CN115396980B - A method and device for wireless communication - Google Patents

A method and device for wireless communication Download PDF

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Publication number
CN115396980B
CN115396980B CN202110566282.1A CN202110566282A CN115396980B CN 115396980 B CN115396980 B CN 115396980B CN 202110566282 A CN202110566282 A CN 202110566282A CN 115396980 B CN115396980 B CN 115396980B
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pdcp
entity
pdu
signaling
node
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CN115396980A (en
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陈宇
张晓博
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Shanghai Langbo Communication Technology Co Ltd
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Shanghai Langbo Communication Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a method and a device used for wireless communication, comprising the following steps: transmitting a first wireless signal comprising a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU; receiving a first signaling; transmitting a second wireless signal in response to receiving the first signaling, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs; the application ensures the continuity of the service through the first signaling.

Description

Method and apparatus for wireless communication
Technical Field
The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly, to a method and apparatus for reducing service interruption, improving service continuity, enhancing reliability, and security in wireless communication.
Background
Future wireless communication systems have more and more diversified application scenes, and different application scenes have different performance requirements on the system. To meet the different performance requirements of various application scenarios, a New air interface technology (NR) is decided to be researched in 3GPP (3 rd Generation Partner Project, third Generation partnership project) RAN (Radio Access Network ) #72 full-time, and a standardization Work for NR is started in 3GPP RAN #75 full-time with NR's WI (Work Item).
In Communication, both LTE (Long Term Evolution ) and 5G NR can be involved in reliable accurate reception of information, optimized energy efficiency ratio, determination of information validity, flexible resource allocation, scalable system structure, efficient non-access layer information processing, lower service interruption and disconnection rate, support for low power consumption, which is important for normal Communication of base stations and user equipments, reasonable scheduling of resources, balancing of system load, so-called high throughput, meeting Communication requirements of various services, improving spectrum utilization, improving base stone of service quality, whether eMBB (ehanced Mobile BroadBand, enhanced mobile broadband), URLLC (Ultra Reliable Low Latency Communication, ultra-high reliability low-latency Communication) or eMTC (ENHANCED MACHINE TYPE Communication ) are indispensable. Meanwhile, in the internet of things in the industrial field IIoT (Industrial Internet of Things), in V2X (vehicle to X) communication (Device to Device) between devices, in communication of unlicensed spectrum, in user communication quality monitoring, in network planning optimization, in NTN (Non Territerial Network, non-terrestrial network communication), in TN (TERRITERIAL NETWORK, terrestrial network communication), in a dual connectivity (Dual connectivity) system, in radio resource management and codebook selection of multiple antennas, there is a wide demand in signaling design, neighbor management, service management, and beamforming, and the transmission modes of information are classified into broadcasting and unicast, and both transmission modes are indispensable for 5G systems because they are very helpful to meet the above demand.
With the increasing of the scene and complexity of the system, the system has higher requirements on reducing the interruption rate, reducing the time delay, enhancing the reliability, enhancing the stability of the system, and the flexibility of the service, and saving the power, and meanwhile, the compatibility among different versions of different systems needs to be considered in the system design.
Disclosure of Invention
In various communication scenarios, the use of relay may be involved, for example, when one remote UE (remote UE) is not within the coverage area of a cell, the network may be accessed through the relay, and the relay node may be another UE. When data transmission is carried out, data of remote UE is firstly sent to a relay node, and then the data is forwarded to a network by the relay node. The link between the relay node and the network or between the relay node and the remote UE may be broken or the relay node decides not to serve the remote UE anymore due to instability or mobility of the radio channel, etc., resulting in the need for the remote UE to reestablish a connection with the network, e.g. directly access the network or access the network through other relays. In this case, the relay node may still buffer the data of the remote UE but cannot transmit, for example, a radio link failure has occurred, or the bearer is released, etc. The remote UE may not know this at all, or the remote UE may not know how much data the relay UE has buffered to be sent. When a connection is re-established with the network, the PDCP layer of the remote UE may retransmit the data, e.g. the RLC layer of the remote UE may inform the PDCP layer that the data has been successfully distributed, and if the PDCP layer chooses not to retransmit the data according to this acknowledgement to have been properly received by the network, this may result in loss of data that is not distributed to the network in the relay node buffer, since the RLC layer ends with the remote UE and the relay node, and the PDCP layer ends with the remote UE and the network. This will further reduce the communication quality, deteriorating the user's experience. In this case, it is an urgent problem to be solved for the case where the RLC entity of the opposite side and the PDCP entity of the opposite side are not in the same node. The method provided by the application can determine which data need to be retransmitted according to whether the RLC entity and the PDCP entity are maintained by the same node, especially which data which are confirmed to be distributed by a lower layer still need to be retransmitted, thereby solving the problems.
In view of the above problems, the present application provides a solution.
It should be noted that, in the case of no conflict, the embodiments of any node of the present application and the features in the embodiments may be applied to any other node. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
The application discloses a method used in a first node of wireless communication, comprising the following steps:
Transmitting a first wireless signal comprising a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
Receiving a first signaling;
Transmitting a second wireless signal in response to receiving the first signaling, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As one embodiment, the problems to be solved by the present application include: when the L2 relay is used, since the RLC layer is terminated by the remote UE and relay, not by the remote UE and network, in some special cases, the PDCP layer of the remote UE needs to retransmit the data; at this time, however, the remote UE simply determines from the RLC layer acknowledgement that the data buffered in the relay node that was not properly distributed to the network is not retransmitted, resulting in data loss.
As one example, the benefits of the above method include: the method provided by the application can solve the problems, avoid data interruption, ensure service quality and ensure service continuity of data communication. Meanwhile, the method provided by the application can reduce unnecessary retransmission as much as possible and reduce the system overhead.
Specifically, according to one aspect of the present application, any PDCP SDU in the first PDCP SDU set is associated with a timer, and the timer associated with any PDCP SDU in the second PDCP SDU set is in an operation state; the first PDCP SDU is any PDCP SDU of the first set of PDCP SDUs; the first PDCP SDU is associated with the first timer, the first timer being the one timer, expiration of the first timer being used to trigger the first PDCP SDU to be removed from the buffer of the first PDCP entity; the first timer starts when the first PDCP SDU is received by the first PDCP entity from a higher layer (upper layer).
Specifically, according to one aspect of the present application, a first protocol layer control PDU is received, the first protocol layer control PDU being used to indicate that all PDCP PDUs preceding a first PDCP PDU are successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
Specifically, according to one aspect of the present application, the first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU are successfully transmitted, where the first PDCP PDU belongs to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
Specifically, according to one aspect of the present application, a second signaling is received, the second signaling being used to indicate 25 most significant bits of a difference between a COUNT value of a next PDCP SDU expected to be received from the first DRB and 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
In particular, according to one aspect of the application, third signaling is received, the third signaling being used to indicate or trigger a reselection relay;
transmitting fourth signaling, which is used to request RRC reestablishment, in response to receiving the third signaling; the fourth signaling is used to trigger the first signaling.
Specifically, according to one aspect of the present application, the COUNT value of the PDCP SDU included in the second PDCP PDU is associated with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking modulus from TX_NEXT and 2 L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed;
Wherein a first DRB, which is a DRB associated with the first PDCP entity, is not suspended.
In particular, according to one aspect of the application, the first node is a user equipment.
Specifically, according to an aspect of the present application, the first node is an internet of things terminal.
In particular, according to one aspect of the application, the first node is a relay.
Specifically, according to one aspect of the present application, the first node is a vehicle-mounted terminal.
In particular, according to one aspect of the application, the first node is an aircraft.
The application discloses a method used in a second node of wireless communication, comprising the following steps:
Receiving a first wireless signal, the first wireless signal comprising a first set of PDCP PDUs, the first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
Transmitting a third wireless signal;
The first signaling is used to trigger a sender of the first wireless signal to send a second wireless signal, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity; the first wireless signal is used to generate a third wireless signal; the third wireless signal includes the first set of PDCP PDUs.
Specifically, according to one aspect of the present application, the second wireless signal is received, and the fourth wireless signal is transmitted; the second radio signal is used to generate the fourth radio signal, the fourth radio signal comprising the second set of PDCP PDUs.
Specifically, according to one aspect of the present application, a first protocol layer control PDU is transmitted, where the first protocol layer control PDU is used to indicate that all PDCP PDUs before a first PDCP PDU are successfully transmitted, and the first PDCP PDU belongs to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
Specifically, according to one aspect of the present application, third signaling is sent, which is used to indicate or trigger a reselection relay;
transmitting fourth signaling, which is used to request RRC reestablishment, in response to receiving the third signaling; the fourth signaling is used to trigger the first signaling.
In particular, according to an aspect of the application, the second node is a user equipment.
Specifically, according to an aspect of the present application, the second node is an internet of things terminal.
In particular, according to one aspect of the application, the second node is a relay.
Specifically, according to an aspect of the present application, the second node is a vehicle-mounted terminal.
In particular, according to one aspect of the application, the second node is an aircraft.
The application discloses a method used in a third node of wireless communication, comprising the following steps:
Receiving a third radio signal and a second set of PDU's, the third radio signal comprising a first set of PDCP PDU's, the first set of PDCP PDU's generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
transmitting a first signaling;
the first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second wireless signal, the second wireless signal comprising the second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
Specifically, according to one aspect of the application, the act of receiving a first set of PDCP PDUs includes receiving a second radio signal, the second radio signal including the first set of PDCP PDUs.
Specifically, according to one aspect of the application, the act of receiving a first set of PDCP PDUs includes receiving a fourth radio signal, the second radio signal including the first set of PDCP PDUs.
Specifically, according to one aspect of the present application, the first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU are successfully transmitted, where the first PDCP PDU belongs to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
Specifically, according to one aspect of the present application, a second signaling is transmitted, the second signaling being used to indicate 25 most significant bits of a difference between a COUNT value of a next PDCP SDU expected to be received from the first DRB and 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
Specifically, according to one aspect of the present application, fourth signaling is received, and the first signaling is transmitted in response to receiving the fourth signaling.
Specifically, according to an aspect of the present application, the third node is a base station.
In particular, according to one aspect of the application, the third node is a cell or group of cells.
In particular, according to one aspect of the application, the third node is a gateway.
In particular, according to one aspect of the application, the third node is an access point.
The application discloses a first node used for wireless communication, comprising:
A first transmitter that transmits a first wireless signal including a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a first receiver that receives a first signaling;
The first transmitter, in response to receiving the first signaling, transmits a second wireless signal, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
The application discloses a second node used for wireless communication, comprising:
A second receiver receiving a first wireless signal including a first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a second transmitter that transmits a third wireless signal;
The first signaling is used to trigger a sender of the first wireless signal to send a second wireless signal, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity; the first wireless signal is used to generate a third wireless signal; the third wireless signal includes the first set of PDCP PDUs.
The application discloses a third node used for wireless communication, comprising:
a third receiver receiving a third radio signal and a second set of PDU's, the third radio signal comprising a first set of PDCP PDU's, the first set of PDCP PDU's being generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a third transmitter that transmits the first signaling;
the first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second wireless signal, the second wireless signal comprising the second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
A third receiver receiving a third radio signal and a second set of PDU's, the third radio signal comprising a first set of PDCP PDU's, the first set of PDCP PDU's being generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a third transmitter that transmits the first signaling;
the first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second wireless signal, the second wireless signal comprising the second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the present application has the following advantages over the conventional scheme: the method provided by the application can prevent the interruption or loss of the data transmitted to the network by the remote node due to the fact that the relay node caches the data which is not distributed when the remote UE transmits the data through the relay node, especially the layer 2 relay access network, and the method provided by the application can not receive the interference of successful distribution confirmation of a lower layer.
As an embodiment, the present application has the following advantages over the conventional scheme: the method provided by the application can reduce unnecessary retransmission through the indication given by the first protocol layer control PDU, the second signaling, the first signaling and the like, thereby saving bandwidth and improving efficiency.
As an embodiment, the present application has the following advantages over the conventional scheme: the method provided by the application can determine the data needing to be retransmitted according to whether the opposite-end PDCP entity of the first PDCP entity and the opposite-end RLC entity of the first RLC entity are maintained by the same node, and can reduce unnecessary retransmission, thereby saving bandwidth and improving efficiency.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings in which:
Fig. 1 shows a flow chart of transmitting a first wireless signal, receiving a first signaling, and transmitting a second wireless signal according to one embodiment of the application;
FIG. 2 shows a schematic diagram of a network architecture according to one embodiment of the application;
Fig. 3 shows a schematic diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to an embodiment of the application;
FIG. 4 shows a schematic diagram of a first node, a second node, and a third node according to one embodiment of the application;
FIG. 5 illustrates a flow chart of a transmission according to one embodiment of the application;
FIG. 6 shows a flow chart of a transmission according to one embodiment of the application;
FIG. 7 shows a schematic diagram of a protocol stack according to one embodiment of the application;
Fig. 8 is a diagram illustrating a first protocol layer control PDU used to determine whether a PDCP SDU included in any PDCP PDU of a first set of PDCP PDUs acknowledged by a lower layer to be successfully distributed belongs to a second set of PDCP SDUs, according to an embodiment of the present application;
FIG. 9 is a diagram illustrating first signaling used to determine whether PDCP SDUs included in any PDCP PDU of a first PDCP PDU set acknowledged by a lower layer to be successfully distributed belong to a second PDCP SDU set in accordance with an embodiment of the present application;
Fig. 10 shows a schematic diagram in which third signaling is used to indicate or trigger a reselection relay in accordance with an embodiment of the present application;
FIG. 11 illustrates a schematic diagram of a processing device for use in a first node in accordance with one embodiment of the present application;
FIG. 12 illustrates a schematic diagram of a processing apparatus for use in a second node in accordance with one embodiment of the application;
Fig. 13 illustrates a schematic diagram of a processing arrangement for use in a second node according to an embodiment of the application.
Detailed Description
The technical scheme of the present application will be described in further detail with reference to the accompanying drawings, and it should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
Example 1
Embodiment 1 illustrates a flow chart for transmitting a first wireless signal, receiving a first signaling, and transmitting a second wireless signal according to one embodiment of the present application, as shown in fig. 1. In fig. 1, each block represents a step, and it is emphasized that the order of the blocks in the drawing does not represent temporal relationships between the represented steps.
In embodiment 1, a first node in the present application transmits a first wireless signal in step 101; receiving first signaling in step 102; transmitting a second wireless signal in step 103;
Wherein the first wireless signal comprises a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
In response to receiving the first signaling, the second wireless signal is transmitted, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
The successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the first node is a UE (User Equipment).
As an embodiment, the lower layer comprises an RLC layer.
As an embodiment, the lower layer comprises a MAC layer.
As an embodiment, the lower layer comprises a physical layer.
As an embodiment, the lower layer includes only protocol layers in { RLC layer, MAC layer, physical layer }.
As an embodiment, the first wireless signal is sent at the PC5 interface.
As one embodiment, the first wireless signal is transmitted over a sidelink.
As an embodiment, the second wireless signal is transmitted over a sidelink.
As one embodiment, the second wireless signal is transmitted over a primary link.
As an embodiment, the second person wireless signal is transmitted at the Uu interface.
As an embodiment, the physical channel occupied by the first radio signal includes a PSSCH (PHYSICAL SIDELINK SHARED CHANNEL ).
As an embodiment, the first wireless signal includes a first MAC PDU, the first MAC PDU including a first MAC sub-PDU, a header of the first MAC sub-PDU being a first MAC sub-header, the first MAC sub-header including 16 most significant bits of a first identity and 8 most significant bits of a second identity; the first identity is used to identify the first node;
As a sub-embodiment of the above embodiment, the first identity and the second identity are respectively link layer identities.
As a sub-embodiment of the above embodiment, the first identity and the second identity are respectively Layer-2 identities.
As a sub-embodiment of the above embodiment, the second identity is used to identify a second node;
As a sub-embodiment of the above embodiment, the second identity is used to identify a relay of the first node;
As a sub-embodiment of the above embodiment, the node for identifying the second identity is a node other than the producer of the first signaling.
As a sub-embodiment of the above embodiment, the node for which the second identity is used for identification does not maintain the second PDCP entity.
As a sub-embodiment of the above embodiment, the node for which the second identity is used for identification maintains the second RLC entity.
As one embodiment, the first wireless signal carries the first set of PDCP PDUs.
As an embodiment, the first radio signal includes N sub-signals, where N is a positive integer, and the N sub-signals of the first radio signal are used to carry any PDCP PDU in the first PDCP PDU set.
As an embodiment, the first PDCP entity generates the first set of PDCP PDUs.
As an embodiment, the first PDCP entity encapsulates any PDCP SDU in the first PDCP SDU set to generate PDCP PDUs, and the PDCP PDUs generated by the first PDCP entity encapsulating any PDCP SDU in the first PDCP SDU set belong to the first PDCP PDU set.
As a sub-embodiment of the above embodiment, encapsulating any PDCP SDU in the first set of PDCP SDUs by the first PDCP entity includes setting a header of PDCP PDUs.
As a sub-embodiment of the above embodiment, encapsulating any PDCP SDU in the first set of PDCP SDUs by the first PDCP entity includes using the any PDCP SDU as payload (payload) or data of PDCP PDUs.
As an embodiment, the first PDCP entity is a maintainer or transmitter of the first PDCP PDU set.
As an embodiment, PDCP PDUs in the first PDCP PDU set correspond to PDCP SDUs in the first PDCP SDU set one-to-one.
As an embodiment, any PDCP PDU of the first set of PDCP PDUs is generated by a unique PDCP SDU of the first set of PDCP SDUs.
As an embodiment, the PDCP PDUs in the first set of PDCP PDUs are the same as the number of elements comprised by the first set of PDCP SDUs.
As an embodiment, one PDCP SDU generates or corresponds or associates only one PDCP PDU.
As an embodiment, any PDCP SDU in the first set of PDCP SDUs comprises an SDAP PDU.
As an embodiment, any PDCP SDU in the first set of PDCP SDUs comprises RRC PDUs.
As an embodiment, one PDCP PDU includes and only includes one PDCP SDU.
As an embodiment, the first signaling comprises RRC signaling.
As an embodiment, the first signaling includes RRCReconfiguration.
As an embodiment, the first signaling includes RRCConnectionReconfiguration.
As an embodiment, the first signaling includes RadioBearerConfig.
As an embodiment, the first signaling includes nr-RadioBearerConfig1.
As an embodiment, the first signaling includes nr-RadioBearerConfig2.
As an embodiment, the first signaling includes SRB-ToAddMod.
As an embodiment, the first signaling includes reestablishPDCP.
As an embodiment, the first signaling comprises DRB-ToAddMod.
As an embodiment, the first signaling includes recoverPDCP.
As an embodiment, the first signaling is transmitted using SRB (SIGNALING RADIO BEARER ) of Uu interface.
As one embodiment, the first signaling is transmitted using SRB 1.
As one embodiment, the first signaling is transmitted using SRB 2.
As one embodiment, the first signaling is transmitted using SRB 3.
As one embodiment, the first signaling triggers the first node to send a second wireless signal.
As one embodiment, the first signaling instructs the first node to transmit a second wireless signal.
As an embodiment, the second wireless signal is sent at the PC5 interface.
As an embodiment, the first signaling is used to indicate a re-establishment of the first PDCP entity.
As an embodiment, the first signaling is used to instruct the first PDCP entity to perform data recovery.
As an embodiment, the first signaling is used to instruct the first PDCP entity to use a new key.
As an embodiment, the physical channel occupied by the second radio signal includes a PSSCH (PHYSICAL SIDELINK SHARED CHANNEL ).
As an embodiment, the Physical channel occupied by the second radio signal includes PUSCH (Physical Uplink SHARED CHANNEL ).
As an embodiment, the second wireless signal includes a second MAC PDU, the second MAC PDU including a second MAC sub-PDU, a header of the second MAC sub-PDU being a second MAC sub-header, the second MAC sub-header including 16 most significant bits of the third identity and 8 most significant bits of the fourth identity; the third identity is used for identifying the first node;
as a sub-embodiment of the above embodiment, the third identity and the fourth identity are respectively link layer identities.
As a sub-embodiment of the above embodiment, the third identity and the fourth identity are respectively Layer-2 identities.
As a sub-embodiment of the above embodiment, the fourth identity is used to identify the second node;
As a sub-embodiment of the above embodiment, the fourth identity is used to identify nodes other than the second node;
as a sub-embodiment of the above embodiment, the fourth identity is used to identify a relay of the first node;
as a sub-embodiment of the above embodiment, the node for identifying the fourth identity is a node other than the producer of the first signaling.
As a sub-embodiment of the above embodiment, the node for which the fourth identity is used for identification does not maintain the second PDCP entity.
As a sub-embodiment of the above embodiment, the node for which the fourth identity is used for identification does not maintain the second RLC entity.
As one embodiment, the second radio signal carries the second set of PDCP PDUs.
As an embodiment, the second radio signal includes M sub-signals, where the M sub-signals of the first radio signal are used to carry any PDCP PDU in the second PDCP PDU set, and M is a positive integer.
As an embodiment, the second PDCP entity generates the second set of PDCP PDUs.
As an embodiment, the second PDCP entity encapsulates any PDCP SDU in the second PDCP SDU set to generate PDCP PDUs, and the PDCP PDUs generated by the second PDCP entity encapsulating any PDCP SDU in the second PDCP SDU set belong to the second PDCP PDU set.
As a sub-embodiment of the above embodiment, encapsulating any PDCP SDU in the second set of PDCP SDUs by the second PDCP entity includes setting a header of a PDCP PDU.
As a sub-embodiment of the above embodiment, encapsulating any PDCP SDU in the second set of PDCP SDUs by the second PDCP entity includes using the any PDCP SDU as payload (payload) or data of PDCP PDUs.
As an embodiment, the second PDCP entity is a maintainer or transmitter of the second set of PDCP PDUs.
As an embodiment, PDCP PDUs in the second set of PDCP PDUs are in one-to-one correspondence with PDCP SDUs in the second set of PDCP SDUs.
As an embodiment, any PDCP PDU of the second set of PDCP PDUs is generated by a unique PDCP SDU of the second set of PDCP SDUs.
As an embodiment, the PDCP PDUs in the second set of PDCP PDUs are the same as the number of elements comprised by the second set of PDCP SDUs.
As an embodiment, any PDCP SDU in the second set of PDCP SDUs comprises an SDAP PDU.
As an embodiment, any PDCP SDU in the second set of PDCP SDUs comprises RRC PDUs.
As an embodiment, any PDCP SDU in the second set of PDCP SDUs does not include RRC PDUs.
As an embodiment, any PDCP SDU in the first set of PDCP SDUs does not include RRC PDUs.
As an embodiment, the first PDCP entity corresponds to or is associated with a first DRB, which is a DRB (Data Radio Bearer ) of the Uu interface.
As an embodiment, the first set of PDCP PDUs and the second set of PDCP PDUs belong to the same DRB.
As an embodiment, the first set of PDCP SDUs and the second set of PDCP SDUs use the same DRB.
As an embodiment, the first set of PDCP PDUs and the second set of PDCP PDUs occupy different RLC bearers.
As one embodiment, the first DRB is an AM DRB.
As an embodiment, any PDCP SDU in the second set of PDCP SDUs belongs to the first set of PDCP SDUs.
As an embodiment, any PDCP PDU of the second set of PDCP PDUs belongs to the first set of PDCP PDUs.
As an embodiment, one PDCP PDU in the second PDCP PDU set does not belong to the first PDCP PDU set.
As an embodiment, the first signaling is received later than the transmission of the first set of PDCP PDUs.
As an embodiment, the first PDCP PDU entity is associated with the first RLC entity of the first node when transmitting the first PDCP PDU set.
As an embodiment, the first PDCP PDU entity is associated with a third RLC entity of the first node when transmitting the second PDCP PDU set.
As an embodiment, the peer RLC entity of the first node and the peer RLC entity of the third RLC entity of the first node are maintained by different communication nodes.
As an embodiment, the first set of PDCP PDUs and the second set of PDCP PDUs are both submitted to the first RLC entity of the first node.
As an embodiment, the first PDCP entity is associated with only one RLC entity of the first node at the same time.
As an embodiment, the act of transmitting the first radio signal includes transmitting a first set of RLC PDUs, the first set of RLC PDUs generated by the first RLC entity, any RLC SDU included in the first set of RLC PDUs belonging to the first set of PDCP PDUs.
As an embodiment, the first PDCP entity is a receiving PDCP entity, and the second PDCP entity is a transmitting PDCP entity.
As an embodiment, the first PDCP entity is a transmitting PDCP entity, and the second PDCP entity is a receiving PDCP entity.
As an embodiment, the lower layer informs the first PDCP entity of successful distribution (Successful delivery) of at least one PDCP PDU of the first set of PDCP PDUs through an inter-layer service or message or primitive.
As an embodiment, the lower layer acknowledges (Successful delivery) successful distribution (Successful delivery) of at least one PDCP PDU of the first set of PDCP PDUs to the first PDCP entity by an inter-layer service or message or primitive.
As an embodiment, the first acknowledgement PDCP PDU is any PDCP PDU of the first set of PDCP PDUs, the successful distribution of the first acknowledgement PDCP PDU is acknowledged by a lower layer of the first PDCP entity, and the PDCP SDU included in the first acknowledgement PDCP PDU is a first acknowledgement PDCP SDU; whether the first confirming PDCP SDU belongs to the second set of PDCP SDUs is related to whether a second PDCP entity and the second RLC entity are maintained by the same communication node.
As an embodiment, successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, and for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity.
As a sub-embodiment of the above embodiment, when the second PDCP entity and the second RLC entity are maintained by the same communication node, PDCP SDUs included for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer as successfully distributed do not belong to the second set of PDCP SDUs.
As a sub-embodiment of the above embodiment, when the second PDCP entity and the second RLC entity are maintained by different communication nodes, respectively, PDCP SDUs included for any PDCP PDU that is acknowledged by a lower layer to be successfully distributed in the first PDCP PDU set belong to the second PDCP SDU set.
As a sub-embodiment of the above embodiment, when layer 2 (L2) relay is used, the second PDCP entity and the second RLC entity are maintained by different communication nodes, respectively.
As a sub-embodiment of the above embodiment, when a type II relay is used, the second PDCP entity and the second RLC entity are maintained by different communication nodes, respectively.
As a sub-embodiment of the above embodiment, when a type I relay is used, the second PDCP entity and the second RLC entity are maintained by different communication nodes, respectively.
As a sub-embodiment of the above embodiment, when the second PDCP entity is maintained by the third node and the second RLC entity is maintained by the second node, PDCP SDUs included for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as successfully distributed belong to the second set of PDCP SDUs.
As a sub-embodiment of the above embodiment, the sentence acknowledges, for any PDCP PDU of the first set of PDCP PDUs that was successfully distributed by a lower layer, whether the included PDCP SDU belongs to the second set of PDCP SDUs and whether the second PDCP entity and the second RLC entity are maintained by the same communication node includes the following meanings: for any one of the first set of PDCP PDUs acknowledged by the lower layer as successfully distributed PDCP PDUs, whether the included PDCP SDU belongs to the second set of PDCP SDUs is related to whether the second PDCP entity and the second RLC entity belong to the same communication node.
As a sub-embodiment of the above embodiment, when the second PDCP entity and the second RLC entity belong to different communication nodes, PDCP SDUs included in PDCP PDUs which are acknowledged by a lower layer to be successfully distributed for any one of the first PDCP PDU sets belong to the second PDCP SDU set.
As a sub-embodiment of the above embodiment, when the second PDCP entity and the second RLC entity belong to a relay and a base station, respectively, PDCP SDUs included in PDCP PDUs which are confirmed to be successfully distributed by a lower layer for any one of the first PDCP PDU sets belong to the second PDCP SDU set.
As a sub-embodiment of the above embodiment, when the second PDCP entity and the second RLC entity belong to a relay and a network, respectively, PDCP SDUs included in PDCP PDUs which are confirmed to be successfully distributed by a lower layer for any one of the first PDCP PDU sets belong to the second PDCP SDU set.
As a sub-embodiment of the above embodiment, when the second PDCP entity and the second RLC entity belong to a relay and a serving cell, respectively, PDCP SDUs included for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer to be successfully distributed belong to the second set of PDCP SDUs.
As a sub-embodiment of the above embodiment, when the second PDCP entity and the second RLC entity belong to relay and serving cell groups, respectively, PDCP SDUs included in PDCP PDUs acknowledged by a lower layer to be successfully distributed for any one of the first PDCP PDU sets belong to the second PDCP SDU set.
As a sub-embodiment of the above embodiment, when both the second PDCP entity and the second RLC entity belong to a network, PDCP SDUs included for any PDCP PDU that is confirmed to be successfully distributed by a lower layer in the first PDCP PDU set do not belong to the second PDCP SDU set.
As a sub-embodiment of the above embodiment, when both the second PDCP entity and the second RLC entity belong to a serving cell group, PDCP SDUs included in PDCP PDUs confirmed to be successfully distributed by a lower layer for any one of the first PDCP PDU sets do not belong to the second PDCP SDU set.
As an embodiment, the association of the first PDCP entity of the sentence with the first RLC entity of the first node comprises the following meanings: the first PDCP entity belongs to the first node; the first PDCP entity and the first RLC entity of the first node have a served-to-served relationship.
As an embodiment, the association of the first PDCP entity of the sentence with the first RLC entity of the first node comprises the following meanings: the first set of PDCP PDUs is submitted to the first RLC entity by the first PDCP entity.
As an embodiment, the association of the first PDCP entity of the sentence with the first RLC entity of the first node comprises the following meanings: the first PDCP entity processes data from the first RLC entity.
As an embodiment, the association of the first PDCP entity of the sentence with the first RLC entity of the first node comprises the following meanings: the PDCP PDU generated by the first PDCP entity is an RLC SDU received by the first RLC entity.
As an embodiment, the association of the first PDCP entity of the sentence with the first RLC entity of the first node comprises the following meanings: the first DRB is associated with an RLC bearer corresponding to the first RLC entity.
As an embodiment, the first RLC entity uses AM (Acknowledged Mode ) mode.
As an embodiment, the second RLC entity uses AM (Acknowledged Mode ) mode.
As an embodiment, the second PDCP entity corresponds to the first DRB.
As an embodiment, the second RLC entity belongs to a relay node.
As an embodiment, the first RLC entity and the second RLC entity respectively belong to RLC entities of a PC5 interface.
As an embodiment, the first RLC entity and the second RLC entity correspond to RLC bearers of a PC5 interface.
As an embodiment, any PDCP SDU in the first set of PDCP SDUs is associated with a timer, and the one timer associated with any PDCP SDU in the second set of PDCP SDUs is in operation; the first PDCP SDU is any PDCP SDU of the first set of PDCP SDUs; the first PDCP SDU is associated with the first timer, the first timer being the one timer, expiration of the first timer being used to trigger the first PDCP SDU to be removed from the buffer of the first PDCP entity; the first timer starts when the first PDCP SDU is received by the first PDCP entity from a higher layer (upper layer).
As a sub-embodiment of the above embodiment, the one timer is DISCARDTIMER.
As a sub-embodiment of the above embodiment, the first timer is DISCARDTIMER.
As a sub-embodiment of the above embodiment, when one PDCP SDU in the first set of PDCP SDUs is determined to belong to the second set of PDCP SDUs, a timer associated with the one PDCP SDU is restarted.
As a sub-embodiment of the above embodiment, when one PDCP SDU in the first set of PDCP SDUs is determined to belong to the second set of PDCP SDUs, a timer associated with the one PDCP SDU is not restarted.
As an embodiment, the first PDCP entity associates a COUNT value of a PDCP SDU included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking modulus from TX_NEXT and 2 L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is a PDCP PDU of any one of the second PDCP PDU sets acknowledged by a lower layer as successfully distributed;
Wherein a first DRB, which is a DRB associated with the first PDCP entity, is not suspended.
As a sub-embodiment of the above embodiment, L is equal to 12.
As a sub-embodiment of the above embodiment, L is equal to 18.
As a sub-embodiment of the above embodiment, L is equal to 6.
As a sub-embodiment of the above embodiment, COUNT is a parameter associated with PDCP SDUs.
As a sub-embodiment of the above embodiment, L least significant bits of the COUNT value associated with one PDCP SDU are equal to the SN of the PDCP PDU corresponding to the one PDCP SDU.
As a sub-embodiment of the above embodiment, the tx_next is a state variable of the first PDCP entity.
As a sub-embodiment of the above embodiment, the first signaling is used to reset the tx_next.
As a sub-embodiment of the above embodiment, the first DRB is a DRB corresponding to or associated with the first PDCP entity.
As a sub-embodiment of the above embodiment, the first DRB is in a non-suspended state.
As one embodiment, the sentence the first PDCP entity associates the COUNT value of the PDCP SDU included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking modulus from TX_NEXT and 2 L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed; wherein a first DRB is not suspended, the first DRB being a DRB associated with the first PDCP entity, comprising the following meanings: the second set of PDCP SDUs is considered as received from a higher layer (upper layer).
As one embodiment, the sentence the first PDCP entity associates the COUNT value of the PDCP SDU included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking modulus from TX_NEXT and 2 L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed; wherein a first DRB is not suspended, the first DRB being a DRB associated with the first PDCP entity, comprising the following meanings: the second set of PDCP SDUs is considered to be newly received from a higher layer (upper layer).
As one embodiment, the sentence the first PDCP entity associates the COUNT value of the PDCP SDU included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking modulus from TX_NEXT and 2 L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed; wherein a first DRB is not suspended, the first DRB being a DRB associated with the first PDCP entity, comprising the following meanings: the second set of PDCP SDUs is considered new data.
As one embodiment, the sentence the first PDCP entity associates the COUNT value of the PDCP SDU included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking modulus from TX_NEXT and 2 L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed; wherein a first DRB is not suspended, the first DRB being a DRB associated with the first PDCP entity, comprising the following meanings: the first PDCP entity associates a COUNT value for any PDCP SDU in the second set of PDCP SDUs according to tx_next after receiving the first signaling, after having associated the COUNT value for any PDCP SDU in the second set of PDCP SDUs.
As one embodiment, the first signaling is used to reset tx_next.
As an example, the phrases tx_next and 2 L modulo refers to MOD (tx_next, 2 L), where MOD is the modulo operation, and the remainder obtained is modulo, e.g., MOD (5, 2) =1, e.g., MOD (7, 4) =3.
As an embodiment, the first DRB is a DRB of a Uu interface.
As an embodiment, when the first signaling indicates data recovery, the i-th PDCP SDU is any PDCP SDU in the first set of PDCP SDUs; and if the ith PDCP SDU belongs to the second PDCP SDU set, the PDCP PDU corresponding to the ith PDCP SDU belongs to the first PDCP PDU set and also belongs to the second PDCP PDU set.
As an embodiment, when the first signaling indicates PDCP re-establishment, the i-th PDCP SDU is any PDCP SDU in the first set of PDCP SDUs; and if the ith PDCP SDU belongs to the second PDCP SDU set, the PDCP PDU corresponding to the ith PDCP SDU does not belong to the first PDCP PDU set and belongs to the second PDCP PDU set.
As an embodiment, the first node detects a radio link failure, triggers the first node to send fourth signaling, which is used to request an RRC connection.
As a sub-embodiment of this embodiment, the first node reselects a relay, and sends the fourth signaling through the reselected relay.
As a sub-embodiment of this embodiment, the fourth signaling is used to request RRC connection re-establishment.
As a sub-embodiment of this embodiment, the radio link failure detected by the first node is a radio link failure of a PC5 interface.
As a sub-embodiment of this embodiment, the first node detects a radio link failure of the PC5 interface for transmitting the first radio signal.
As an embodiment, the link between the first node and the relay is released, triggering the first node to send fourth signaling, which is used to request an RRC connection.
As a sub-embodiment of this embodiment, the first node releases the link between the first node and the relay.
As a sub-embodiment of this embodiment, the first node receives signaling indicating to release the link between the first node and the relay.
As a sub-embodiment of this embodiment, the relay is the second node.
As a sub-embodiment of this embodiment, the first node fails to successfully receive feedback of KEEP ALIVE signals between itself and the relay.
As a sub-embodiment of this embodiment, the link between the first node and the relay is a PC5 link.
As a sub-embodiment of this embodiment, the link between the first node and the relay is a direct link.
As a sub-embodiment of this embodiment, the link between the first node and the relay is a PC5 unicast link.
As a sub-embodiment of this embodiment, the link between the first node and the relay is a wireless link for transmitting the first wireless signal.
Example 2
Embodiment 2 illustrates a schematic diagram of a network architecture according to one embodiment of the application, as shown in fig. 2. Fig. 2 illustrates V2X communication architecture under 5G NR (NewRadio, new air interface), LTE (Long-Term Evolution) and LTE-a (Long-Term Evolution Advanced, enhanced Long-Term Evolution) system architecture. The 5G NR or LTE network architecture may be referred to as 5GS (5 GSystem)/EPS (Evolved PACKET SYSTEM) or some other suitable terminology.
The V2X communication architecture of embodiment 2 includes UE (User Equipment) 201, UE241, ng-RAN (next generation radio access network) 202,5GC (5G Core Network)/EPC (Evolved Packet Core, evolved packet core) 210, hss (Home Subscriber Server )/UDM (Unified DATA MANAGEMENT) 220, ProSe function 250 and ProSe application server 230. The V2X communication architecture may be interconnected with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the V2X communication architecture provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this disclosure may be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR node bs (gnbs) 203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gNB203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (transmit receive node), or some other suitable terminology. The gNB203 provides the UE201 with an access point to the 5GC/EPC 210. Examples of UE201 include a cellular telephone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a non-terrestrial base station communication, a satellite mobile communication, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, an drone, an aircraft, a narrowband internet of things device, a machine-type communication device, a land-based vehicle, an automobile, a wearable device, or any other similar functional device. Those of skill in the art may also refer to the UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. gNB203 is connected to 5GC/EPC210 through an S1/NG interface. the 5GC/EPC210 includes MME (Mobility MANAGEMENT ENTITY )/AMF (Authentication MANAGEMENT FIELD, authentication management domain)/SMF (Session Management Function ) 211, other MME/AMF/SMF214, S-GW (SERVICE GATEWAY, serving gateway)/UPF (UserPlaneFunction, user plane functions) 212 and P-GW (PACKET DATE Network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC 210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet Protocal, internet protocol) packets are transported through the S-GW/UPF212, which S-GW/UPF212 itself is connected to the P-GW/UPF213. The P-GW provides UE IP address assignment as well as other functions. The P-GW/UPF213 is connected to the internet service 230. Internet services 230 include operator-corresponding internet protocol services, which may include, in particular, the internet, intranets, IMS (IP Multimedia Subsystem ) and packet-switched streaming services. The ProSe function 250 is a logic function for network related behavior required for a ProSe (Proximity-based Service); including DPF (Direct Provisioning Function, direct provision Function), direct Discovery name management Function (Direct Discovery NAME MANAGEMENT Function), EPC level Discovery ProSe Function (EPC-level Discovery ProSe Function), and the like. the ProSe application server 230 has the functions of storing EPC ProSe user identities, mapping between application layer user identities and EPC ProSe user identities, allocating ProSe-restricted code suffix pools, etc.
As an embodiment, the UE201 and the UE241 are connected through a PC5 reference point (REFERENCE POINT).
As an embodiment, the ProSe function 250 is connected to the UE201 and the UE241 through PC3 reference points, respectively.
As an embodiment, the ProSe function 250 is connected to the ProSe application server 230 via a PC2 reference point.
As an embodiment, the ProSe application server 230 is connected to the ProSe application of the UE201 and the ProSe application of the UE241 via PC1 reference points, respectively.
As an embodiment, the third node, the first node and the second node in the present application are NR node B, UE and UE241, respectively.
As an embodiment, the first node and the second node in the present application are UE201 and UE241, respectively.
As an embodiment, the third node gNB203 in the present application.
As an embodiment, the radio link between the UE201 and the UE241 corresponds to a sidelink (Sidelink, SL) in the present application.
As an embodiment, the radio link from the UE201 to the NR node B is an uplink.
As an embodiment, the radio link from the NR node B to the UE201 is a downlink.
As an embodiment, the UE201 supports relay transmission.
As an embodiment, the UE241 supports relay transmission.
As one example, the UE201 is a vehicle including an automobile.
As one example, the UE241 is a vehicle including an automobile.
As an embodiment, the gNB203 is a macro cell (MarcoCellular) base station.
As one example, the gNB203 is a Micro Cell (Micro Cell) base station.
As an embodiment, the gNB203 is a pico cell (PicoCell) base station.
As an embodiment, the gNB203 is a flying platform device.
As one embodiment, the gNB203 is a satellite device.
Example 3
Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to the application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, fig. 3 shows the radio protocol architecture for the control plane 300 for a first node (UE, satellite or aerial in gNB or NTN) and a second node (gNB, satellite or aerial in UE or NTN), or between two UEs, in three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the links between the first node and the second node and the two UEs through PHY301. The L2 layer 305 includes a MAC (Medium Access Control ) sublayer 302, an RLC (Radio Link Control, radio link layer control protocol) sublayer 303, and a PDCP (PACKET DATA Convergence Protocol ) sublayer 304, which terminate at the second node. the PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by ciphering the data packets and handover support for the first node between second nodes. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out of order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell among the first nodes. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control ) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second node and the first node. The PC5-S (PC 5SIGNALING PROTOCOL ) sublayer 307 is responsible for the processing of the signaling protocol of the PC5 interface. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer), the radio protocol architecture for the first node and the second node in the user plane 350 is substantially the same for the physical layer 351, PDCP sublayer 354 in the L2 layer 355, RLC sublayer 353 in the L2 layer 355 and MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is an SDAP (SERVICE DATA Adaptation Protocol ) sublayer 356, the SDAP sublayer 356 being responsible for mapping between QoS flows and data radio bearers (DRBs, data Radio Bearer) to support diversity of traffic. Although not shown, the first node may have several upper layers above the L2 layer 355. Further included are a network layer (e.g., IP layer) terminating at the P-GW on the network side and an application layer terminating at the other end of the connection (e.g., remote UE, server, etc.). For UEs involving relay services, the control plane may also include an adaptation sublayer AP308 and the user plane may also include an adaptation sublayer AP358, the introduction of which may facilitate multiplexing and/or distinguishing data from multiple source UEs by lower layers, such as the MAC layer, e.g., RLC layer. In addition, the adaptation sublayers AP308 and AP358 may also be sublayers within PDCP304 and PDCP354, respectively. The RRC306 may be used to handle RRC signaling for Uu interface and signaling for PC5 interface.
As an embodiment, the radio protocol architecture in fig. 3 is applicable to the first node in the present application.
As an embodiment, the radio protocol architecture in fig. 3 is applicable to the second node in the present application.
As an embodiment, the radio protocol architecture in fig. 3 is applicable to the third node in the present application.
As an embodiment, the first signaling in the present application is generated in RRC306.
As an embodiment, the second signaling in the present application is generated in RRC306.
As an embodiment, the third signaling in the present application is generated in RRC306 or PC5-S307.
As an embodiment, the fourth signaling in the present application is generated in RRC306.
As an embodiment, the first protocol layer control PDU in the present application is generated at the AP308 or the AP358.
As an embodiment, the first wireless signal in the present application is generated in the PHY301 or the PHY351.
As an embodiment, the second wireless signal in the present application is generated in the PHY301 or the PHY351.
As an embodiment, the third wireless signal in the present application is generated in the PHY301 or the PHY351.
As an embodiment, the fourth wireless signal in the present application is generated in the PHY301 or the PHY351.
As an embodiment, the first PDCP PDU set in the present application is generated in PDCP304 or PDCP354.
As an embodiment, the protocol layer corresponding to the first PDCP entity in the present application is PDCP304 or PDCP354.
As an embodiment, the protocol layer corresponding to the second PDCP entity in the present application is PDCP304 or PDCP354.
As an embodiment, the protocol layer corresponding to the first RLC entity in the present application is RLC303 or PDCP353.
As an embodiment, the protocol layer corresponding to the second RLC entity in the present application is RLC303 or PDCP353.
As an embodiment, the first PDCP SDU set in the present application is generated in the SDAP356 or the RRC306.
Example 4
Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the application, as shown in fig. 4. Fig. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.
The first communication device 450 includes a controller/processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter/receiver 454, and an antenna 452.
The second communication device 410 includes a controller/processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.
In the transmission from the second communication device 410 to the first communication device 450, upper layer data packets from the core network are provided to a controller/processor 475 at the second communication device 410. The controller/processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, a controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller/processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., physical layer). Transmit processor 416 performs coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal clusters based on various modulation schemes, e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM). The multi-antenna transmit processor 471 digitally space-precodes the coded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. A transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate a physical channel carrying the time domain multicarrier symbol stream. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multiple antenna transmit processor 471 to a radio frequency stream and then provides it to a different antenna 420.
In a transmission from the second communication device 410 to the first communication device 450, each receiver 454 receives a signal at the first communication device 450 through its respective antenna 452. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream that is provided to a receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various signal processing functions for the L1 layer. A multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. The receive processor 456 converts the baseband multicarrier symbol stream after receiving the analog precoding/beamforming operation from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receive processor 456, wherein the reference signal is to be used for channel estimation, and the data signal is subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial stream destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in a receive processor 456 and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals that were transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller/processor 459. The controller/processor 459 implements the functions of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the second communication device 450, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the core network. The upper layer packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.
In the transmission from the first communication device 450 to the second communication device 410, a data source 467 is used at the first communication device 450 to provide upper layer data packets to a controller/processor 459. Data source 467 represents all protocol layers above the L2 layer. Similar to the transmit functions at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller/processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocations, implementing L2 layer functions for the user and control planes. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming, with the multi-antenna transmit processor 457 performing digital multi-antenna spatial precoding, after which the transmit processor 468 modulates the resulting spatial stream into a multi-carrier/single-carrier symbol stream, which is analog precoded/beamformed in the multi-antenna transmit processor 457 before being provided to the different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and provides it to an antenna 452.
In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals to baseband signals, and provides the baseband signals to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement the functions of the L1 layer. The controller/processor 475 implements L2 layer functions. The controller/processor 475 may be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, a controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the UE 450. Upper layer packets from the controller/processor 475 may be provided to the core network.
As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: transmitting a first wireless signal comprising a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU; receiving a first signaling; transmitting a second wireless signal in response to receiving the first signaling, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs; wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the first communication device 450 includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: transmitting a first wireless signal comprising a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU; receiving a first signaling; transmitting a second wireless signal in response to receiving the first signaling, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs; wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: receiving a first wireless signal, the first wireless signal comprising a first set of PDCP PDUs, the first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU; transmitting a third wireless signal; the first signaling is used to trigger a sender of the first wireless signal to send a second wireless signal, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs; wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity; the first wireless signal is used to generate a third wireless signal; the third wireless signal includes the first set of PDCP PDUs.
As an embodiment, the first communication device 450 includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a first wireless signal, the first wireless signal comprising a first set of PDCP PDUs, the first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU; transmitting a third wireless signal; the first signaling is used to trigger a sender of the first wireless signal to send a second wireless signal, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs; wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity; the first wireless signal is used to generate a third wireless signal; the third wireless signal includes the first set of PDCP PDUs.
As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 410 means at least: receiving a third radio signal and a second set of PDU's, the third radio signal comprising a first set of PDCP PDU's, the first set of PDCP PDU's generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU; transmitting a first signaling; the first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second wireless signal, the second wireless signal comprising the second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs; wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a third radio signal and a second set of PDU's, the third radio signal comprising a first set of PDCP PDU's, the first set of PDCP PDU's generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU; transmitting a first signaling; the first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second wireless signal, the second wireless signal comprising the second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs; wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the first communication device 450 corresponds to a first node in the present application.
As an embodiment, the second communication device 450 corresponds to a second node in the present application.
As an embodiment, the second communication device 410 corresponds to a third node in the present application.
As an embodiment, the first communication device 450 is a UE.
As an embodiment, the first communication device 450 is an in-vehicle terminal.
As an embodiment, the first communication device 450 is a relay.
As an embodiment, the second communication device 410 is a base station.
For one embodiment, the first communication device 410 is an access point.
As an example, a receiver 456 (including an antenna 460), a receive processor 452 and a controller/processor 490 are used in the present application to receive the first signaling.
As an example, a receiver 456 (including an antenna 460), a receive processor 452 and a controller/processor 490 are used in the present application to receive the second signaling.
As an example, a receiver 456 (including an antenna 460), a receive processor 452 and a controller/processor 490 are used in the present application to receive the third signaling.
As an example, a receiver 456 (including an antenna 460), a receive processor 452 and a controller/processor 490 are used in the present application to receive the first protocol layer control PDU.
As one example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used in the present application to transmit the first wireless signal.
As one example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used in the present application to transmit the second wireless signal.
As an example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used to transmit the first set of PDCP PDUs in the present application.
As an example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used to transmit the second set of PDCP PDUs in the present application.
As an example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used in the present application to transmit the fourth signaling.
As one example, receiver 456 (including antenna 460), receive processor 452 and controller/processor 490 are used in the present application to receive the first wireless signal.
As an example, receiver 456 (including antenna 460), receive processor 452 and controller/processor 490 are used in the present application to receive the second wireless signal.
As an example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used in the present application to transmit the third signaling.
As one example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used in the present application to transmit the third wireless signal.
As one example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used in the present application to transmit the fourth wireless signal.
As an example, a transmitter 456 (including an antenna 460), a transmit processor 455 and a controller/processor 490 are used in the present application to transmit the first protocol layer control PDU.
As an example, the transmitter 416 (including the antenna 420), the transmit processor 412 and the controller/processor 440 are used in the present application to transmit the first signaling.
As an example, the transmitter 416 (including the antenna 420), the transmit processor 412 and the controller/processor 440 are used in the present application to send the second signaling.
As an example, receiver 416 (including antenna 420), receive processor 412 and controller/processor 440 are used in the present application to receive the third wireless signal.
As an example, receiver 416 (including antenna 420), receive processor 412 and controller/processor 440 are used in the present application to receive the fourth wireless signal.
As an example, receiver 416 (including antenna 420), receive processor 412 and controller/processor 440 are used in the present application to receive the fourth signaling.
Example 5
Embodiment 5 illustrates a wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 5. In fig. 5, U01 corresponds to a first node of the present application, U02 corresponds to a second node of the present application, and U03 corresponds to a third node of the present application, and it is specifically illustrated that the order in this example is not limited to the order of signal transmission and the order of implementation in the present application, where the steps in F51 are optional, and example 6 gives another implementation of the functions implemented by the steps in F52.
For the first node U01, transmitting a first wireless signal in step S5101; receiving a third signaling in step S5102; transmitting a fourth signaling in step S5103; receiving a first protocol layer control PDU in step S5104; receiving a second signaling in step S5105; receiving a first signaling in step S5106; the second wireless signal is transmitted in step S5107.
For the second node U02, receiving a first wireless signal in step S5201; transmitting a third wireless signal in step S5202; transmitting a third signaling in step S5203; the first protocol layer control PDU is transmitted in step S5204.
For the third node U03, receiving a third wireless signal in step S5301; receiving a fourth signaling in step S5302; transmitting a second signaling in step S5303; transmitting a first signaling in step S5304; the second wireless signal is received in step S5305.
In embodiment 5, the first wireless signal comprises a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
in response to receiving the first signaling, a second wireless signal is transmitted, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the first node U01 is a remote UE, the second node U02 is a relay, and the third node U03 is a serving cell of the first node U01.
As an embodiment, the first node U01 is a remote UE, the second node U02 is a relay, and the third node U03 is a candidate cell of the first node U01.
As an embodiment, the first node U01 is a remote UE, the second node U02 is a relay, and the third node U03 is a base station.
As an embodiment, the third node U03 is a Pcell of the first node U01.
As an embodiment, the third node U03 is a SpCell of the first node U01.
As an embodiment, the third node U03 is an MCG (MASTER CELL Group of primary cells) of the first node U01.
As an embodiment, the communication interface between the first node U01 and the second node U02 is a PC5.
As an embodiment, a sidelink is used for communication between the first node U01 and the second node U02.
As an embodiment, the communication interface between the first node U01 and the third node U03 is Uu.
As an embodiment, the communication interface between the second node U02 and the third node U03 is Uu.
As one embodiment, the first wireless signal is a physical layer signal.
As one embodiment, the first set of PDCP PDUs uses ciphering.
As one embodiment, the first set of PDCP PDUs uses integrity protection.
As one embodiment, the first wireless signal is used to generate the third wireless signal.
As a sub-embodiment of the above embodiment, the third radio signal comprises or carries the first set of PDCP PDUs.
As a sub-embodiment of the above embodiment, the third radio signal is used to forward or relay the first set of PDCP PDUs.
As a sub-embodiment of the above embodiment, the physical channel occupied by the third radio signal includes PUSCH.
As a sub-embodiment of the above embodiment, the logical channel occupied by the third wireless signal is DCCH.
As a sub-embodiment of the above embodiment, the third wireless signal is a physical layer signal.
As a sub-embodiment of the above embodiment, the third wireless signal includes a MAC PDU different from the MAC PDU included in the first wireless signal.
As a sub-embodiment of the above embodiment, the RLC PDU included in the third radio signal is different from the RLC PDU included in the first radio signal.
As an embodiment, the third signaling is used to indicate relay reselection.
As an embodiment, the third signaling comprises PC5-RRC signaling.
As an embodiment, the third signaling comprises PC5-S signaling.
As an embodiment, the third signaling comprises a control PDU of the user plane.
As an embodiment, the physical channel occupied by the third signaling includes a PSSCH.
As an embodiment, the physical Channel occupied by the third signaling includes PSCCH (PHYSICAL SIDELINK Control Channel ).
As an embodiment, the third signaling is used to trigger the first PDCP entity re-establishment.
As an embodiment, the third signaling is used to trigger the first RLC entity re-establishment of the first node U01.
As an embodiment, the fourth signaling comprises RRC signaling.
As an embodiment, the fourth signaling is sent over the Uu interface.
As an embodiment, the physical channel occupied by the fourth signaling includes PUSCH.
As an embodiment, the fourth signaling includes RRCReestablishmentRequest.
As an embodiment, the fourth signaling includes RRCConnectionReestablishmentRequest.
As an embodiment, the fourth signaling includes RRCResumeRequest.
As an embodiment, the fourth signaling includes RRCConnectionResumeRequest.
As an embodiment, the fourth signaling is sent over SRB 0.
As an embodiment, the fourth signaling is included in msg3 or msgA of a random access procedure.
As an embodiment, the third node U03 sends signaling for feeding back the fourth signaling.
As an embodiment, the first protocol layer control PDU is a control PDU of a first protocol layer.
As a sub-embodiment of the above embodiment, the first protocol layer is an adaptation layer.
As a sub-embodiment of the above embodiment, the first protocol layer is SLAP.
As a sub-embodiment of the above embodiment, the first protocol layer is an adaptation layer.
As a sub-embodiment of the above embodiment, the first protocol layer is AP308 or AP358 in embodiment 3.
As a sub-embodiment of the above embodiment, the first protocol layer is a layer above the RLC layer.
As a sub-embodiment of the above embodiment, the first protocol layer is a layer below the PDCP layer.
As a sub-embodiment of the above embodiment, the first protocol layer is configured to multiplex received data of different RLC channels to be transmitted on one RLC channel.
As an embodiment, the first protocol layer control PDU is a control PDU.
As an embodiment, the first protocol layer control PDU indicates a sequence number of a first PDCP PDU.
As an embodiment, the first protocol layer control PDU indicates a sequence number-1 of the first PDCP PDU.
As an embodiment, the first protocol layer control PDU indicates MOD (X-z+2 L,2L), where MOD is a modulo operation, and L is the number of bits occupied by the sequence number of the PDCP PDU in the first PDCP PDU set; x is the sequence number of the first PDCP PDU and z is an integer, e.g., z is equal to 1, e.g., z is equal to-1.
As an embodiment, the first protocol layer control PDU indicates a COUNT value of PDCP SDUs included in the first PDCP PDU.
As an embodiment, the first protocol layer control PDU indicates a COUNT value of-1 of PDCP SDUs included in the first PDCP PDU.
As an embodiment, the first protocol layer control PDU indicates a first missing (FIRST MISSING) RLC SDU.
As an embodiment, the first PDCP PDU is the first missing (FIRST MISSING) RLC SDU.
As an embodiment, the first protocol layer control PDU indicates the number of RLC SDUs in the buffer, and the first PDCP PDU is the earliest sequence number.
As an embodiment, the first protocol layer control PDU indicates an rx_next state variable of a second RLC entity, wherein the first PDCP PDU corresponds to an RLC SDU indicated or determined by the rx_next.
As an embodiment, the first protocol layer control PDU indicates a tx_next_ack state variable of a third RLC entity, wherein the first PDCP PDU corresponds to the RLC SDU indicated or determined by the tx_next_ack.
As an embodiment, the first protocol layer control PDU indicates a tx_next_ack state variable of a third RLC entity, wherein the first PDCP PDU corresponds to a previous RLC SDU of the RLC SDU indicated or determined by the tx_next_ack.
As an embodiment, the third RLC entity is associated with the first DRB.
As an embodiment, the third RLC entity is configured to send the RLC SDU received by the second RLC entity to the RLC entity of the third node U03.
As an embodiment, the first protocol layer control PDU indicates that RLC SDUs in the buffer have all been transmitted, and the first PDCP PDU is the next PDCP PDU expected to be received.
As an embodiment, the sender of the first protocol layer control PDU is not co-located with the sender of the first signaling.
As an embodiment, the sender of the first protocol layer control PDU is the receiver of the first RLC PDU set.
As an embodiment, the first protocol layer control PDU is used to indicate the next PDCP PDU waiting to be transmitted.
As an embodiment, the first signaling indicates a sequence number of the first PDCP PDU.
As an embodiment, the first signaling indicates a sequence number-1 of the first PDCP PDU.
As an embodiment, the first signaling indicates MOD (X-z+2l, 2L), where MOD is a modulo operation, and L is the number of bits occupied by the sequence numbers of PDCP PDUs in the first PDCP PDU set; x is the sequence number of the first PDCP PDU and z is an integer, e.g., z is equal to 1, e.g., z is equal to-1.
As an embodiment, the first signaling indicates a COUNT value of PDCP SDUs included in the first PDCP PDU.
As an embodiment, the first signaling indicates a COUNT value-1 of PDCP SDUs included in the first PDCP PDU.
As one embodiment, the first signaling indicates a first lost (FIRST MISSING) PDCP PDU.
As an embodiment, the first signaling indicates a last PDCP PDU of the first lost (FIRST MISSING) PDCP PDUs.
As one embodiment, the first PDCP PDU is a first lost (FIRST MISSING) PDCP PDU.
As an embodiment, the first signaling indicates the number of PDCP PDUs in the buffer, and the first PDCP PDU is the earliest sequence number.
As an embodiment, the first signaling indicates an rx_next state variable of a second PDCP entity, wherein the first PDCP PDU corresponds to a PDCP PDU indicated or determined by the rx_next.
As an embodiment, the first signaling indicates an rx_ DELIV state variable of a second PDCP entity, wherein the first PDCP PDU corresponds to the PDCP PDU indicated or determined by the rx_ DELIV.
As an embodiment, the sender of the first signaling is a receiver of the first set of PDCP PDUs.
As an embodiment, the first signaling is used to indicate the next PDCP PDU waiting to be received.
As an embodiment, the second signaling is used to indicate 25 most significant bits of a difference between a COUNT value of a next PDCP SDU expected to be received from the first DRB and 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
As a sub-embodiment of the above embodiment, the second signaling comprises RRC signaling.
As a sub-embodiment of the above embodiment, the second signaling includes CounterCheck.
As a sub-embodiment of the above embodiment, the second signaling is transmitted using SRB1 of the Uu interface.
As a sub-embodiment of the above embodiment, the second signaling includes drb-CountMSB-InfoList.
As a sub-embodiment of the above embodiment, the second signaling includes an identity of the first DRB.
As a sub-embodiment of the above embodiment, the second signaling includes countMSB-Downlink of the first DRB.
As a sub-embodiment of the above embodiment, the second signaling includes countMSB-Uplink of the first DRB.
As an embodiment, the second signaling is used to indicate 25 most significant bits of a result of a difference between the state variables rx_next and 1 of the second PDCP entity.
As a sub-embodiment of the above embodiment, the 25 most significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU are the same as the 25 most significant bits of the result of the second signaling for indicating the difference between the state variables rx_next and 1 of the second PDCP entity, and the 7 least significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU is 0000000.
As a sub-embodiment of the above embodiment, the 25 most significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU are the same as the 25 most significant bits of the result of the second signaling indicating the difference between the state variables rx_next and 1 of the second PDCP entity, and the 7 least significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU are 0000001.
As an embodiment, the second signaling is used to indicate 25 most significant bits of a result of a difference between the state variables tx_next and 1 of the second PDCP entity.
As an embodiment, the second signaling is used to indicate 25 most significant bits of a result of a difference between the state variables rx_ DELIV and 1 of the second PDCP entity.
As a sub-embodiment of the above embodiment, the 25 most significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU are the same as the 25 most significant bits of the result of the second signaling indicating the difference between the state variables rx_ DELIV and 1 of the second PDCP entity, and the 7 least significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU are 0000000.
As a sub-embodiment of the above embodiment, the 25 most significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU are the same as the 25 most significant bits of the result of the second signaling indicating the difference between the state variables rx_ DELIV and 1 of the second PDCP entity, and the 7 least significant bits of the COUNT value of the PDCP SDU included in the first PDCP PDU are 0000001.
As an embodiment, the second signaling indicates an SN of a first lost PDCP PDU of the first DRB.
As an embodiment, the first signaling is forwarded through the second node U02.
As an embodiment, the second signaling is forwarded through the second node U02.
As an embodiment, the fourth signaling is forwarded through the second node U02.
As an embodiment, the first signaling is used for mobility management of the first node U01.
As an embodiment, the transmission of the second signal starts from the first signaling.
As an embodiment, the first signaling instructs the first node U01 to switch from passing through a relay connection network to a direct connection network.
As an embodiment, the first signaling indicates that the connection mode of the first node U01 and the network is changed from an indirect (direct) mode to a direct (direct) mode.
As an embodiment, the connection mode of the first node U01 and the network is switched from the indirect (direct) mode to the direct (direct) mode, and the sending of the second wireless signal is triggered.
As an embodiment, the connection mode of the first node U01 and the network is switched from the indirect (direct) mode to the direct (direct) mode, and the sending of the first signaling is triggered.
As an embodiment, the connection mode of the first node U01 and the network is switched from the indirect (direct) mode to the direct (direct) mode, and the sending of the fourth signaling is triggered.
As an embodiment, indirect connection of a UE with a network refers to the UE being connected with the network through a relay node.
As an embodiment, indirect connection of the UE with the network means that the peer RLC entity of the remote UE is not maintained by the network.
As an embodiment, the indirect connection of the UE with the network means that the second RLC entity is not maintained by the network.
As an embodiment, a direct connection of a UE with a network means that the UE does not need to connect with the network through a relay node.
As an embodiment, the direct connection of the UE with the network refers to the peer RLC entity of the remote UE being maintained by the network.
As an embodiment, the direct connection of the UE with the network means that the second RLC entity is maintained by the network.
As an embodiment, the second wireless signal is directly sent to the second node U02.
As an embodiment, the second wireless signal is sent over a Uu interface.
As one embodiment, the second wireless signal is transmitted over a PUSCH channel.
As an embodiment, the first signaling is used to configure a fifth RLC entity of the first node U01, the fifth RLC entity being associated with the first DRB, a peer RLC entity of the fifth RLC entity being maintained by the second node U02.
As an embodiment, the function of the step in F52 is to send the second set of PDCP PDUs to the second node U02.
As an embodiment, the third signaling comprises PC5-RRC signaling.
As an embodiment, the third signaling comprises PC5-S signaling.
As one embodiment, the third signaling uses SRB transmission.
As an embodiment, the third signaling is transmitted using a PC5 interface.
As an embodiment, the physical layer channel occupied by the third signaling is a PSCCH.
Example 6
Embodiment 6 illustrates a wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 6. In fig. 6, U11 corresponds to a first node of the present application, U13 corresponds to a third node of the present application, and U14 is a relay node, and it is specifically illustrated that the order in this example does not limit the order of signal transmission and implementation in the present application; example 6 based on example 5, the parts required in example 6 but not shown can be seen in example 5; example 6 is another embodiment of the step in F52 of example 5.
For the first node U11, a second wireless signal is transmitted in step S6101.
For the third node U13, a fourth wireless signal is received in step S6301.
For the fourth node U14, receiving a second wireless signal in step S6401; the fourth wireless signal is transmitted in step S6402.
As an embodiment, the second wireless signal uses a PC5 interface.
As an embodiment, the second wireless signal uses a sidelink.
As an embodiment, the physical channel occupied by the second wireless signal includes a PSSCH.
As an embodiment, the physical channel occupied by the second wireless signal comprises a PSCCH.
As an embodiment, the RLC PDU comprised by the second radio signal is generated by an entity other than the first RLC entity of the U11 of the first node.
As an embodiment, the RLC PDU comprised by the second radio signal is generated by an entity other than the third RLC entity of the U11 of the first node.
As an embodiment, a peer RLC entity of the RLC entity generating the RLC PDU comprised by the second radio signal is maintained by the fourth node U14.
As an embodiment, the fourth node U14 is a node other than the third node.
As an embodiment, the fourth node U14 is a relay node of the first node U11.
As an embodiment, the fourth node U14 is a UE.
As an embodiment, the communication interface between the fourth node U14 and the first node U11 is a PC5.
As one embodiment, the fourth wireless signal is generated by the second wireless signal.
As an embodiment, the fourth radio signal comprises the second set of PDCP PDUs.
As an embodiment, the fourth radio signal is for forwarding the second set of PDCP PDUs.
As an embodiment, the fourth wireless signal is different from the MAC PDU included in the second wireless signal.
As an embodiment, the fourth radio signal is different from the RLC PDU comprised by the second radio signal.
As an embodiment, the fourth radio signal is identical to the PDCP PDU included in the second radio signal.
As an embodiment, the fourth wireless signal is transmitted over a Uu interface.
As an embodiment, the physical channel occupied by the fourth wireless signal includes PUSCH.
As an embodiment, the communication interface between the fourth node U14 and the third node U13 is Uu.
Example 7
Embodiment 7 illustrates a schematic diagram of a protocol stack according to one embodiment of the application, as shown in fig. 7. Fig. 7 includes two embodiments (a) and (b).
In the protocol stack shown in fig. 7 (a), the first protocol layer terminates with the relay node and the gNB node.
In the protocol stack shown in fig. 7 (b), the first protocol layer is terminated by the UE and the relay node, the relay node and the gNB node, respectively.
As an embodiment, the UE in fig. 7 corresponds to the first node of the present application, and the relay in fig. 7 corresponds to the second node of the present application; the gNB in FIG. 7 corresponds to the third node of the present application.
As an embodiment, embodiment 7 is based on embodiment 3, showing a protocol stack and an interface related to a relay node; in embodiment 7, the NAS is a non-access stratum, the Uu-RRC is an RRC protocol of a Uu interface, and the Uu-PDCP is a PDCP layer of the Uu interface; the Uu-RLC is an RLC layer of a Uu interface, the Uu-MAC is an MAC layer of the Uu interface, and the Uu-PHY is a physical layer of the Uu interface; the PC5-RLC is the RLC layer of the PC5 interface; the PC5-MAC is the MAC layer of the PC5 interface; the PC5-PHY is the physical layer of the PC5 interface; n2 Stack is a protocol Stack of an N2 interface, and the N2 interface is an interface between the gNB and the core network; the Uu first protocol layer is a first protocol layer of a Uu interface; the PC 5-first protocol layer is the first protocol layer of the PC5 interface.
As an embodiment, the first DRB is a radio bearer between the UE and the gNB; the first DRB corresponds to the first PDCP entity;
As an embodiment, the first PDCP entity is an entity corresponding to the Uu-PDCP layer of the UE shown in fig. 7.
As an embodiment, the second PDCP entity is an entity corresponding to the Uu-PDCP layer of the gNB in fig. 7.
As an embodiment, the first RLC entity is an entity corresponding to the PC5-RLC layer of the UE illustrated in fig. 7.
As an embodiment, the second RLC entity is an entity corresponding to the PC5-RLC layer of the relay shown in fig. 7.
As an embodiment, the third RLC entity of the present application is an entity corresponding to the Uu-RLC layer of the relay shown in fig. 7.
As an embodiment, the fourth RLC entity of the present application is an entity corresponding to the Uu-RLC layer of the gNB shown in fig. 7.
As an embodiment, the first signaling is generated in the Uu-RRC layer of the gNB in fig. 7.
As an example, the first wireless signal is generated at the PC5-PHY layer of the UE in fig. 7.
As an example, the second wireless signal is generated at the PC5-PHY layer of the UE in fig. 7.
As an embodiment, the communication interface between the UE and the gNB in fig. 7 is a Uu interface.
As an embodiment, the communication interface between the relay and the gNB in fig. 7 is a Uu interface.
As an example, the communication interface between the UE and the relay in fig. 7 is a PC5 interface.
As an example, the first protocol layer control PDU is generated at the PC 5-first protocol layer of the relay of fig. 7 (b).
As an embodiment, the second set of PDCP PDUs is data buffered by the relay node.
Example 8
Embodiment 8 illustrates a schematic diagram in which a first protocol layer control PDU is used to determine whether PDCP SDUs included in any PDCP PDU of a first set of PDCP PDUs acknowledged by a lower layer to be successfully distributed belong to a second set of PDCP SDUs, as shown in fig. 8, according to an embodiment of the present application.
As an embodiment, the first protocol layer control PDU is used to indicate a first PDCP PDU, and PDCP PDUs preceding the first PDCP PDU are all received by the third node.
As an embodiment, the COUNT value of the PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer to be successfully distributed is not less than the COUNT value of the PDCP SDU included in the first PDCP PDU.
As an embodiment, PDCP PDUs of which COUNT value of a PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed is greater than or equal to the COUNT value of a PDCP SDU included in the first PDCP PDU is determined to belong to the second set of PDCP PDUs.
As an embodiment, a PDCP SDU in which an associated COUNT value of PDCP SDUs included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer to be successfully distributed is greater than or equal to the associated COUNT value of PDCP SDUs included in the first PDCP PDU is determined to belong to the second set of PDCP SDUs.
As an embodiment, PDCP SDUs in which an associated COUNT value of PDCP SDUs included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer to be successfully distributed is smaller than an associated COUNT value of PDCP SDUs included in the first PDCP PDU are not determined to belong to the second set of PDCP SDUs.
As one embodiment, the first PDCP SDU is a PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs acknowledged by the lower layer as successfully distributed, and is determined to belong to the second set of PDCP SDUs if the COUNT value associated with the first PDCP SDU is greater than or equal to the COUNT value associated with the PDCP SDU included in the first PDCP PDU.
As one embodiment, the second PDCP SDU is a PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer to be successfully distributed, and the first PDCP SDU is determined not to belong to the second set of PDCP SDUs if the COUNT value associated with the second PDCP SDU is smaller than the COUNT value associated with the PDCP SDU included in the first PDCP PDU.
As an embodiment, the first protocol layer control PDU includes a sequence number of the first PDCP PDU.
As an embodiment, the first protocol layer control PDU includes a COUNT value associated with the first PDCP SDU.
As an embodiment, the sequence numbers of the second PDCP PDU set all belong to the transmission window of the first PDCP entity.
As an embodiment, the COUNT value associated with any PDCP SDU in the second set of PDCP SDUs is greater than the state variable tx_next-Z of the first PDCP entity, where z=2 (L-1), where L is the number of bits occupied by the sequence number of the PDCP PDU in the first set of PDCP PDUs.
As an embodiment, the COUNT value associated with any PDCP SDU in the second set of PDCP SDUs is not less than the state variable tx_next-Z of the first PDCP entity, where z=2 (L-1), where L is the number of bits occupied by the sequence number of the PDCP PDU in the first set of PDCP PDUs.
Example 9
Embodiment 9 illustrates a schematic diagram in which first signaling is used to determine whether PDCP SDUs included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer to be successfully distributed belong to the second set of PDCP SDUs, as shown in fig. 9, according to an embodiment of the present application.
As an embodiment, the first signaling is used to indicate a first PDCP PDU, all PDCP PDUs preceding the first PDCP PDU being received by the third node.
As an embodiment, the first signaling is used to indicate a first PDCP SDU, and PDCP SDUs preceding the first PDCP SDU are all received by the third node.
As an embodiment, the COUNT value of the PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer to be successfully distributed is not less than the COUNT value of the PDCP SDU included in the first PDCP PDU.
As an embodiment, PDCP PDUs of which COUNT value of a PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed is greater than or equal to the COUNT value of a PDCP SDU included in the first PDCP PDU is determined to belong to the second set of PDCP PDUs.
As an embodiment, a PDCP SDU in which an associated COUNT value of PDCP SDUs included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer to be successfully distributed is greater than or equal to the associated COUNT value of PDCP SDUs included in the first PDCP PDU is determined to belong to the second set of PDCP SDUs.
As an embodiment, PDCP SDUs in which an associated COUNT value of PDCP SDUs included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer to be successfully distributed is smaller than an associated COUNT value of PDCP SDUs included in the first PDCP PDU are not determined to belong to the second set of PDCP SDUs.
As one embodiment, the first PDCP SDU is a PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs acknowledged by the lower layer as successfully distributed, and is determined to belong to the second set of PDCP SDUs if the COUNT value associated with the first PDCP SDU is greater than or equal to the COUNT value associated with the PDCP SDU included in the first PDCP PDU.
As one embodiment, the second PDCP SDU is a PDCP SDU included in any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer to be successfully distributed, and the first PDCP SDU is determined not to belong to the second set of PDCP SDUs if the COUNT value associated with the second PDCP SDU is smaller than the COUNT value associated with the PDCP SDU included in the first PDCP PDU.
As an embodiment, the first signaling includes a sequence number of the first PDCP PDU.
As an embodiment, the first signaling includes a COUNT value associated with the first PDCP SDU.
As an embodiment, the sequence numbers of the second PDCP PDU set all belong to the transmission window of the first PDCP entity.
As an embodiment, the COUNT value associated with any PDCP SDU in the second set of PDCP SDUs is greater than the state variable tx_next-Z of the first PDCP entity, where z=2 (L-1), where L is the number of bits occupied by the sequence number of the PDCP PDU in the first set of PDCP PDUs.
As an embodiment, the COUNT value associated with any PDCP SDU in the second set of PDCP SDUs is not less than the state variable tx_next-Z of the first PDCP entity, where z=2 (L-1), where L is the number of bits occupied by the sequence number of the PDCP PDU in the first set of PDCP PDUs.
Example 10
Embodiment 10 illustrates a schematic diagram in which third signaling is used to indicate or trigger a reselection relay, as shown in fig. 10, according to an embodiment of the present application.
As an embodiment, the third signaling indicates that a radio link failure occurs.
As a sub-embodiment of the above embodiment, the third signaling indicates that the second node has failed a radio link.
As a sub-embodiment of the above embodiment, the third signaling indicates that a Uu interface radio link failure occurs.
As a sub-embodiment of the above embodiment, the third signaling indicating that a radio link failure occurred is used to indicate or trigger a reselection relay.
As an embodiment, the third signaling indicates that the second timer expires.
As a sub-embodiment of the above embodiment, the third signaling indicates that the transmission of the Uu interface is not completed before the expiration of the second timer.
As a sub-embodiment of the above embodiment, the third signaling indicates that the second timer expiration is used to indicate or trigger a reselection relay.
As an embodiment, the third signaling indicates that a handover occurs.
As a sub-embodiment of the above embodiment, the third signaling indicates that ReconfigurationWithSync is received.
As a sub-embodiment of the above embodiment, the third signaling indicates that the serving cell is changed.
As a sub-embodiment of the above embodiment, the third signaling indicates that the PCell is changed.
As a sub-embodiment of the above embodiment, the third signaling indicating that a handover occurs is used to indicate or trigger a reselection relay.
As an embodiment, the third signaling indicates that the RRC connection is released.
As a sub-embodiment of the above embodiment, the third signaling indicates that RRC connection is released is used to indicate or trigger a reselection relay.
As an embodiment, the third signaling indicates that the second PDCP entity is released.
As a sub-embodiment of the above embodiment, the third signaling indicates that the second PDCP entity is released to be used to indicate or trigger a reselection relay.
As an embodiment, the third signaling indicates that the first DRB is released.
As a sub-embodiment of the above embodiment, the third signaling indicates that the first DRB is released is used to indicate or trigger a reselection relay.
As an embodiment, the third signaling indicates that the first DRB is suspended.
As a sub-embodiment of the above embodiment, the third signaling indicates that the first DRB is suspended is used to indicate or trigger a reselection relay.
As an embodiment, the third signaling indicates that RLC bearers of a Uu interface associated with the first DRB are released.
As a sub-embodiment of the above embodiment, the third signaling indicates that RLC bearers of a Uu interface associated with the first DRB are released to be used to indicate or trigger reselection relaying.
As an embodiment, the third signaling indicates that the link is released.
As a sub-embodiment of the above embodiment, the third signaling indicates that the unicast link is released.
As a sub-embodiment of the above embodiment, the third signaling indicates that the PC5 link is released.
As a sub-embodiment of the above embodiment, the third signaling indicates that the direct link is released.
As a sub-embodiment of the above embodiment, the third signaling indicating link is released to be used for indicating or triggering a reselection relay.
As an embodiment, the third signaling indicates a relay failure.
As a sub-embodiment of the above embodiment, the third signaling indicates that the capability is insufficient.
As a sub-embodiment of the above embodiment, the third signaling indicates failure for unknown reasons.
As a sub-embodiment of the above embodiment, the third signaling indicates incompatibility.
As a sub-embodiment of the above embodiment, the third signaling indicates a buffer overflow.
As a sub-embodiment of the above embodiment, the third signaling indicates a preemption failure.
As a sub-embodiment of the above embodiment, the third signaling indicates that the priority is insufficient.
As a sub-embodiment of the above embodiment, the third signaling indicates that the relay is preempted.
As a sub-embodiment of the above embodiment, the third signaling indicates a power shortage.
As a sub-embodiment of the above embodiment, the third signaling indicates overheating.
As a sub-embodiment of the above embodiment, the third signaling indicates that the relay failed is used to indicate or trigger a reselection relay.
As one embodiment, the third signaling indicates that congestion or blocking is occurring (barring).
As a sub-embodiment of the above embodiment, the third signaling indication that congestion or blocking (barring) occurred is used to indicate or trigger a reselection relay.
As an embodiment, the third signaling explicitly indicates to reselect a relay.
As an embodiment, the first node reselects the relay according to the signal strength.
As an embodiment, the first node reselects the relay according to a priority.
As an embodiment, the first node reselects the relay according to the traffic type.
As an embodiment, the first node reselects the relay according to the PLMN.
Example 11
Embodiment 11 illustrates a block diagram of a processing apparatus for use in a first node according to one embodiment of the application; as shown in fig. 11. In fig. 11, the processing means 1100 in the first node comprises a first receiver 1101 and a first transmitter 1102. In the case of the embodiment of the present application in which the sample is a solid,
A first transmitter 1102 that transmits a first wireless signal including a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a first receiver 1101 that receives first signaling;
The first transmitter 1102, in response to receiving the first signaling, transmits a second wireless signal, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, any PDCP SDU in the first set of PDCP SDUs is associated with a timer, and the one timer associated with any PDCP SDU in the second set of PDCP SDUs is in operation; the first PDCP SDU is any PDCP SDU of the first set of PDCP SDUs; the first PDCP SDU is associated with the first timer, the first timer being the one timer, expiration of the first timer being used to trigger the first PDCP SDU to be removed from the buffer of the first PDCP entity; the first timer starts when the first PDCP SDU is received by the first PDCP entity from a higher layer.
As an embodiment, the first receiver 1101 receives a first protocol layer control PDU, where the first protocol layer control PDU is used to indicate that all PDCP PDUs before a first PDCP PDU are successfully transmitted, and the first PDCP PDU belongs to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
As an embodiment, the first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU are successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
As an embodiment, the first receiver 1101 receives second signaling, where the second signaling is used to indicate 25 most significant bits of a difference between a COUNT value of a next expected PDCP SDU of the first DRB and 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
As an embodiment, the first receiver 1101 receives third signaling, which is used to indicate or trigger a reselection relay;
In response to receiving the third signaling, the first transmitter 1102 transmits fourth signaling, which is used to request RRC reestablishment; the fourth signaling is used to trigger the first signaling.
As an embodiment, the first transmitter 1102 associates a COUNT value of PDCP SDUs included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking the modulo of TX_NEXT and 2L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed;
Wherein a first DRB, which is a DRB associated with the first PDCP entity, is not suspended.
As an embodiment, the first node is a User Equipment (UE).
As an embodiment, the first node is a terminal supporting a large delay difference.
As an embodiment, the first node is a terminal supporting NTN.
As an embodiment, the first node is an aircraft.
As an embodiment, the first node is an in-vehicle terminal.
As an embodiment, the first node is a relay.
As an embodiment, the first node is a ship.
As an embodiment, the first node is an internet of things terminal.
As an embodiment, the first node is a terminal of an industrial internet of things.
As an embodiment, the first node is a device supporting low latency and high reliability transmissions.
As an example, the first receiver 1101 includes at least one of the antenna 452, the receiver 454, the receive processor 456, the multi-antenna receive processor 458, the controller/processor 459, the memory 460, or the data source 467 in example 4.
As an example, the first transmitter 1102 may include at least one of the antenna 452, the transmitter 454, the transmit processor 468, the multi-antenna transmit processor 457, the controller/processor 459, the memory 460, or the data source 467 of example 4.
Example 12
Embodiment 12 illustrates a block diagram of a processing arrangement for use in a second node according to one embodiment of the application; as shown in fig. 12. In fig. 12, the processing means 1200 in the second node comprises a second receiver 1202 and a second transmitter 1201. In the case of the embodiment of the present application in which the sample is a sample,
A second receiver 1202 that receives a first wireless signal including a first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
A second transmitter 1201 transmitting a third wireless signal;
The first signaling is used to trigger a sender of the first wireless signal to send a second wireless signal, the second wireless signal comprising a second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity; the first wireless signal is used to generate a third wireless signal; the third wireless signal includes the first set of PDCP PDUs.
As an embodiment, the second receiver 1202 receives a second wireless signal;
The second transmitter 1201 transmits a fourth wireless signal; the second radio signal is used to generate the fourth radio signal, the fourth radio signal comprising the second set of PDCP PDUs.
As an embodiment, the second transmitter 1201 sends a first protocol layer control PDU, where the first protocol layer control PDU is used to indicate that all PDCP PDUs before a first PDCP PDU are successfully transmitted, and the first PDCP PDU belongs to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
As an embodiment, the second transmitter 1201 transmits third signaling, which is used to indicate or trigger a reselection relay.
As an embodiment, the second node is a User Equipment (UE).
As an embodiment, the second node is a terminal supporting a large delay difference.
As an embodiment, the second node is a terminal supporting NTN.
As an embodiment, the second node is an aircraft.
As an embodiment, the second node is an in-vehicle terminal.
As an embodiment, the second node is a relay.
As an embodiment, the second node is a ship.
As an embodiment, the second node is an internet of things terminal.
As an embodiment, the second node is a terminal of an industrial internet of things.
As an embodiment, the second node is a device supporting low latency and high reliability transmissions.
As an example, the second transmitter 1201 includes at least one of the antenna 420, the transmitter 418, the transmission processor 416, the multi-antenna transmission processor 471, the controller/processor 475, and the memory 476 in example 4.
As an example, the second receiver 1202 includes at least one of the antenna 420, the receiver 418, the receive processor 470, the multi-antenna receive processor 472, the controller/processor 475, and the memory 476 of example 4.
Example 13
Embodiment 13 illustrates a block diagram of a processing apparatus for use in a third node according to one embodiment of the application; as shown in fig. 13. In fig. 13, the processing means 1300 in the third node comprises a third receiver 1302 and a third transmitter 1301. In the case of the embodiment of the present application in which the sample is a solid,
A third receiver 1302 that receives a third radio signal and a second set of PDU's, the third radio signal comprising a first set of PDCP PDU's, the first set of PDCP PDU's generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
A third transmitter 1301 transmitting the first signaling;
the first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second wireless signal, the second wireless signal comprising the second set of PDU's; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
As an embodiment, the act of receiving a first set of PDCP PDUs includes the third receiver 1302 receiving a second radio signal, the second radio signal including the first set of PDCP PDUs.
As an embodiment, the act of receiving a first set of PDCP PDUs includes the third receiver 1302 receiving a fourth radio signal, the second radio signal including the first set of PDCP PDUs.
As an embodiment, the first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU are successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
As an embodiment, the third transmitter 1301 transmits a second signaling, which is used to indicate 25 most significant bits of the difference between the COUNT value of the next PDCP SDU expected to be received by the first DRB and 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
As an embodiment, the third receiver 1302 receives the fourth signaling, and the third transmitter 1301 sends the first signaling in response to receiving the fourth signaling.
As an embodiment, the third node is a gateway.
As an embodiment, the third node is a base station supporting a large delay difference.
As an embodiment, the third node is a satellite.
As an embodiment, the third node is a base station.
As an embodiment, the third node is an access point.
As an example, the third transmitter 1301 includes at least one of the antenna 420, the transmitter 418, the transmission processor 416, the multi-antenna transmission processor 471, the controller/processor 475, and the memory 476 in example 4.
As an example, the third receiver 1302 includes at least one of the antenna 420, the receiver 418, the receive processor 470, the multi-antenna receive processor 472, the controller/processor 475, and the memory 476 of example 4.
Those of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described methods may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment may be implemented in a hardware form or may be implemented in a software functional module form, and the present application is not limited to any specific combination of software and hardware. The user equipment, terminal and UE in the present application include, but are not limited to, unmanned aerial vehicles, communication modules on unmanned aerial vehicles, remote control airplanes, aircrafts, mini-planes, mobile phones, tablet computers, notebooks, vehicle-mounted Communication devices, wireless sensors, network cards, internet of things terminals, RFID terminals, NB-IoT terminals, MTC (MACHINE TYPE Communication) terminals, eMTC (ENHANCED MTC ) terminals, data cards, network cards, vehicle-mounted Communication devices, low cost mobile phones, low cost tablet computers, satellite Communication devices, ship Communication devices, NTN user devices, and other wireless Communication devices. The base station or system equipment in the present application includes, but is not limited to, wireless communication equipment such as macro cell base stations, micro cell base stations, home base stations, relay base stations, gNB (NR node B) NR node B, TRP (TRANSMITTER RECEIVER Point, transmitting and receiving node), NTN base stations, satellite equipment, flight platform equipment, and the like.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (34)

1. A first node for wireless communication, comprising:
A first transmitter that transmits a first wireless signal including a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a first receiver that receives a first signaling;
The first transmitter, in response to receiving the first signaling, transmitting a second wireless signal, the second wireless signal comprising a second set of PDCP PDUs; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
2. The first node of claim 1, wherein the first node,
Any PDCP SDU in the first set of PDCP SDUs is associated with a timer, the one timer associated with any PDCP SDU in the second set of PDCP SDUs being in operation; the first PDCP SDU is any PDCP SDU of the first set of PDCP SDUs; the first PDCP SDU is associated with a first timer, the first timer being the one timer, expiration of the first timer being used to trigger removal of the first PDCP SDU from the buffer of the first PDCP entity; the first timer starts when the first PDCP SDU is received by the first PDCP entity from a higher layer.
3. The first node according to claim 1 or 2, comprising:
The first receiver receives a first protocol layer control PDU, wherein the first protocol layer control PDU is used for indicating that PDCP PDUs before a first PDCP PDU are successfully transmitted, and the first PDCP PDU belongs to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
4. A first node according to any one of the claims 1 to 3, characterized in that,
The first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU were successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
5. The first node according to any of claims 1 to 4, comprising:
The first receiver receiving second signaling for indicating 25 most significant bits of a difference between a COUNT value of a next PDCP SDU expected to be received by the first DRB and 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
6. The first node according to any of claims 1 to 5, comprising:
the first receiver receiving third signaling, the third signaling being used to indicate or trigger a reselection relay;
in response to receiving the third signaling, the first transmitter transmits fourth signaling, the fourth signaling being used to request RRC reestablishment; the fourth signaling is used to trigger the first signaling.
7. The first node according to any of claims 1 to 6, comprising:
The first transmitter associating a COUNT value of PDCP SDUs included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking modulus from TX_NEXT and 2 L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed;
Wherein a first DRB, which is a DRB associated with the first PDCP entity, is not suspended.
8. A second node for wireless communication, comprising:
A second receiver receiving a first wireless signal including a first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a second transmitter that transmits a third wireless signal;
The first signaling is used to trigger a sender of the first radio signal to send a second radio signal, the second radio signal comprising a second set of PDCP PDUs; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity; the first wireless signal is used to generate a third wireless signal; the third wireless signal includes the first set of PDCP PDUs.
9. The second node of claim 8, wherein the second node comprises a second node comprising a second node,
The second receiver receives a second wireless signal;
the second transmitter transmits a fourth wireless signal; the second radio signal is used to generate the fourth radio signal, the fourth radio signal comprising the second set of PDCP PDUs.
10. The second node according to claim 8 or 9, characterized in that,
The second transmitter transmits a first protocol layer control PDU, wherein the first protocol layer control PDU is used for indicating that PDCP PDUs before a first PDCP PDU are successfully transmitted, and the first PDCP PDU belongs to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
11. The second node according to any of the claims 8 to 10, characterized in that,
The second transmitter transmits third signaling, which is used to indicate or trigger a reselection relay.
12. A third node for wireless communication, comprising:
a third receiver receiving a third radio signal and a second set of PDCP PDUs, the third radio signal comprising a first set of PDCP PDUs, the first set of PDCP PDUs being generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
a third transmitter that transmits the first signaling;
The first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second radio signal, the second radio signal comprising the second set of PDCP PDUs; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
13. The third node of claim 12, wherein the third node is configured to,
The receiving the first set of PDCP PDUs includes the third receiver receiving a second radio signal that includes the first set of PDCP PDUs.
14. The third node according to claim 12 or 13, characterized in that,
The receiving the first set of PDCP PDUs includes the third receiver receiving a fourth radio signal, the second radio signal including the first set of PDCP PDUs.
15. The third node according to any of the claims 12 to 14, characterized in that,
The first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU were successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
16. The third node according to any of the claims 12 to 15, characterized in that,
The third transmitter transmitting second signaling for indicating 25 most significant bits of a difference between a COUNT value of a next PDCP SDU expected to be received from the first DRB and 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
17. The third node according to any of the claims 12 to 16, characterized in that,
The third receiver receives a fourth signaling, and the third transmitter transmits the first signaling in response to receiving the fourth signaling.
18. A method in a first node for wireless communication, comprising:
Transmitting a first wireless signal comprising a first set of PDCP PDUs generated by a first PDCP entity of the first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
Receiving a first signaling;
transmitting a second wireless signal in response to receiving the first signaling, the second wireless signal comprising a second set of PDCP PDUs; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by the lower layer, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by the lower layer as being successfully distributed, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as the second PDCP entity and the second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
19. The method in the first node of claim 18,
Any PDCP SDU in the first set of PDCP SDUs is associated with a timer, the one timer associated with any PDCP SDU in the second set of PDCP SDUs being in operation; the first PDCP SDU is any PDCP SDU of the first set of PDCP SDUs; the first PDCP SDU is associated with a first timer, the first timer being the one timer, expiration of the first timer being used to trigger removal of the first PDCP SDU from the buffer of the first PDCP entity; the first timer starts when the first PDCP SDU is received by the first PDCP entity from a higher layer.
20. Method in a first node according to claim 18 or 19, characterized in that,
Receiving a first protocol layer control PDU, wherein the first protocol layer control PDU is used for indicating that PDCP PDUs before a first PDCP PDU are successfully transmitted, and the first PDCP PDU belongs to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
21. The method in a first node according to any of the claims 18 to 20, characterized in,
The first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU were successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
22. The method in a first node according to any of the claims 18 to 21, characterized in,
Receiving second signaling, the second signaling being used to indicate 25 most significant bits of a difference of a COUNT value of a next PDCP SDU expected to be received from the first DRB from 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
23. The method in a first node according to any of the claims 18 to 22,
Receiving third signaling, wherein the third signaling is used for indicating or triggering reselection relay;
transmitting fourth signaling, which is used to request RRC reestablishment, in response to receiving the third signaling; the fourth signaling is used to trigger the first signaling.
24. The method in a first node according to any of the claims 18 to 23,
Associating a COUNT value of the PDCP SDU included in the second PDCP PDU with tx_next; setting PDCP SN of the second PDCP PDU as remainder obtained by taking the modulo of TX_NEXT and 2L, wherein L is bit number occupied by the PDCP SN; the second PDCP PDU is any PDCP PDU of the second set of PDCP PDUs acknowledged by the lower layer as successfully distributed;
Wherein a first DRB, which is a DRB associated with the first PDCP entity, is not suspended.
25. A method in a second node for wireless communication, comprising:
Receiving a first wireless signal, the first wireless signal comprising a first set of PDCP PDUs, the first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
Transmitting a third wireless signal;
The first signaling is used to trigger a sender of the first radio signal to send a second radio signal, the second radio signal comprising a second set of PDCP PDUs; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
Wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity; the first wireless signal is used to generate a third wireless signal; the third wireless signal includes the first set of PDCP PDUs.
26. The method in the second node according to claim 25,
Receiving the second wireless signal and transmitting a fourth wireless signal; the second radio signal is used to generate the fourth radio signal, the fourth radio signal comprising the second set of PDCP PDUs.
27. Method in a second node according to claim 25 or 26, characterized in that,
Transmitting a first protocol layer control PDU, the first protocol layer control PDU being used to indicate that PDCP PDUs preceding a first PDCP PDU are successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first protocol layer control PDU is used to determine whether a PDCP SDU included in any PDCP PDU of the first PDCP PDU set that is acknowledged by a lower layer to be successfully distributed belongs to the second PDCP SDU set.
28. The method in a second node according to any of the claims 25-27,
Transmitting third signaling, wherein the third signaling is used for indicating or triggering reselection relay;
transmitting fourth signaling, which is used to request RRC reestablishment, in response to receiving the third signaling; the fourth signaling is used to trigger the first signaling.
29. A method in a third node for wireless communication, comprising:
Receiving a third radio signal and a second set of PDCP PDUs, the third radio signal comprising a first set of PDCP PDUs, the first set of PDCP PDUs generated by a first PDCP entity of a first node; the first set of PDCP PDUs includes at least one PDCP PDU; the first set of PDCP SDUs is a set of PDCP SDUs included with the first set of PDCP PDUs; the first set of PDCP SDUs includes at least one PDCP SDU;
transmitting a first signaling;
The first signaling is used to trigger a generator of the first set of PDCP PDUs to transmit a second radio signal, the second radio signal comprising the second set of PDCP PDUs; the second set of PDCP PDUs includes at least one PDCP PDU; the set of PDCP SDUs included in the second set of PDCP PDUs is the second set of PDCP SDUs; the second set of PDCP SDUs is a subset of the first set of PDCP SDUs;
wherein successful distribution of at least one PDCP PDU of the first set of PDCP PDUs is acknowledged by a lower layer of the first PDCP entity of the first node, for any PDCP PDU of the first set of PDCP PDUs that is acknowledged by a lower layer of the first PDCP entity of the first node, whether the included PDCP SDU belongs to the second set of PDCP SDUs is maintained by the same communication node as a second PDCP entity and a second RLC entity; the first PDCP entity is associated with a first RLC entity of the first node, the first RLC entity uses an AM mode, a peer PDCP entity of the first PDCP entity is the second PDCP entity, and a peer RLC entity of the first RLC entity is the second RLC entity.
30. The method in the third node according to claim 29,
The receiving a first set of PDCP PDUs includes receiving a second radio signal that includes the first set of PDCP PDUs.
31. The method in a third node according to any of the claims 29-30,
The receiving a first set of PDCP PDUs includes receiving a fourth radio signal, the second radio signal including the first set of PDCP PDUs.
32. The method in a third node according to any of the claims 29-31,
The first signaling is used to indicate that all PDCP PDUs preceding a first PDCP PDU were successfully transmitted, the first PDCP PDU belonging to the first PDCP PDU set; the first signaling is used to determine whether any PDCP SDU included in the PDCP PDUs successfully delivered by the lower layer acknowledgement in the first set of PDCP PDUs belongs to the second set of PDCP SDUs.
33. The method in a third node according to any of the claims 29-32,
Transmitting second signaling, the second signaling being used to indicate 25 most significant bits of a difference value of COUNT value of a next PDCP SDU expected to be received from the first DRB from 1; the second signaling is received before the first signaling;
The 25 most significant bits of the COUNT value of any PDCP SDU in the second set of PDCP SDUs are not less than the 25 most significant bits of the difference of the COUNT value of the next expected received PDCP SDU indicated by the second signaling from 1;
the first PDCP entity corresponds to the first DRB.
34. The method in a third node according to any of the claims 29-33,
And receiving fourth signaling, and sending the first signaling as a response of receiving the fourth signaling.
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