CN118120322A

CN118120322A - Communication method and device

Info

Publication number: CN118120322A
Application number: CN202180103254.4A
Authority: CN
Inventors: 马腾; 张世昌; 林晖闵; 赵振山
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2024-05-31
Also published as: WO2023115411A1

Abstract

The present application provides a communication method and apparatus, the method comprising: a terminal device receives downlink control information DCI, the DCI is used to schedule a network physical downlink shared channel PDSCH of a multicast broadcast service MBS. The terminal device determines the propagation mode of the MBS according to the indication information and/or configuration information of the DCI. In this way, the terminal device determines the propagation mode of the MBS through the indication information and/or configuration information of the DCI, so that the DCI can be accurately decoded.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus.

Background

For Multicast Broadcast services (Broadcast Multicast Service, MBS), the manner in which network devices schedule transmissions includes Broadcast (Broadcast), multicast (Multicast), and Unicast (Unicast). The MBS service is sent in a broadcast mode, and is suitable for the terminal equipment to be in a radio resource control (Radio Resource Control, RRC) IDLE (IDLE) state, an RRC non-connection (INACTIVE) state and an RRC connection (ACTIVE) state. And sending MBS service to a group of terminal equipment in a multicast mode, wherein the MBS service is applicable to the terminal equipment in the group in an RRC CONNECTED state, and the network equipment sends the same MBS service to the group of terminal equipment in a Point to Multi-Point (PTM) sending mode.

In the related art, since transmission of MBS service is not supported, it is not necessary to distinguish whether PDCCH is used for scheduling broadcast or multicast. When terminal equipment in RRC IDLE state and RRC INACTIVE state receives MBS service after supporting MBS service transmission, since the terminal equipment does not enter a connection state, MBS service can only be received in a broadcast mode, and therefore, the received DCI is decoded according to DCI format and corresponding information field used for scheduling broadcast.

However, the terminal device in the RRC CONNECTED state may receive the MBS service sent by the broadcast manner while the terminal device in the RRC CONNECTED state receives the MBS service sent by the multicast manner, so that the terminal device in the RRC CONNECTED state cannot determine the propagation manner of the MBS scheduled by the received DCI, and further the terminal device cannot accurately decode the DCI.

Content of the application

The embodiment of the application provides a communication method and a communication device, which are used for solving the technical problem that terminal equipment in a connection state in the prior art cannot determine the propagation mode of a MBS (multicast service provider) scheduled by received DCI.

A first aspect of the present application provides a communication method, the method comprising:

The method comprises the steps that a terminal device receives downlink control information DCI, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a network of a multicast broadcast service MBS;

and the terminal equipment determines the propagation mode of the MBS according to the indication information and/or the configuration information of the DCI.

In an alternative embodiment, the propagation modes of the MBS include broadcast and multicast.

In an alternative embodiment, the indication information of the DCI includes an information field in the DCI, where the information field in the DCI is used to indicate that the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH.

In an alternative embodiment, if the information field includes one bit, two valued states of the one bit are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.

In an alternative embodiment, one bit in the information field is located in the first bit in all information fields of the DCI.

In an optional embodiment, if the information field includes a plurality of bits, two value states of a target bit in the plurality of bits are respectively used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, or preset value states of the plurality of bits are respectively used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH.

In an alternative embodiment, the preset value state is a value state multiplexed in the information domain or a value state reserved in the information domain.

In an alternative embodiment, the information domain is a dedicated information domain of a propagation mode of the MBS or an information domain existing in the DCI.

In an optional implementation manner, the configuration information of the DCI includes a radio network temporary identifier RNTI corresponding to a cyclic redundancy check CRC of a physical downlink control channel PDCCH, and different RNTIs are respectively used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH.

In an alternative embodiment, the propagation mode of the MBS indicated by the RNTI is divided according to the type of the RNTI.

In an alternative embodiment, the configuration information of the DCI further includes a set of control resources used for scheduling PDCCH, different sets of control resources being used for associating the broadcasted PDSCH or the multicasted PDSCH scheduled by the DCI, respectively.

In an optional embodiment, the configuration information of the DCI further includes a search space corresponding to a scheduling PDCCH, and different search spaces are used to associate the broadcasted PDSCH or the multicasted PDSCH scheduled by the DCI, respectively.

In an alternative embodiment, the propagation manner of the MBS associated with the search space is divided according to the type of the search space.

In an alternative embodiment, the type of search space comprises a public search space, a private search space, or a business-private search space.

In an alternative embodiment, the propagation mode of the MBS associated with the search space is divided according to a preset frequency domain position.

In an optional implementation manner, after the terminal device determines the propagation mode of the MBS according to the configuration information of the DCI, the method further includes:

The terminal equipment determines a DCI format corresponding to the propagation mode of the MBS.

In an optional embodiment, after the terminal device determines the DCI format corresponding to the propagation mode of the MBS, the method further includes:

and the terminal equipment decodes the DCI according to a DCI format corresponding to the propagation mode of the MBS.

A second aspect of the present application provides a communication method, the method comprising:

The network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS, and the indication information and/or the configuration information of the DCI are used for determining the propagation mode of the MBS.

A third aspect of the present application provides a communication apparatus, the apparatus comprising:

A receiving module, configured to receive downlink control information DCI, where the DCI is used to schedule a network physical downlink shared channel PDSCH of a multicast broadcast service MBS;

And the processing module is used for determining the propagation mode of the MBS according to the indication information and/or the configuration information of the DCI.

In an optional implementation manner, the processing module is further configured to determine a DCI format corresponding to the propagation mode of the MBS.

In an optional implementation manner, the processing module is further configured to decode the DCI according to a DCI format corresponding to a propagation mode of the MBS.

A fourth aspect of the present application provides a communication apparatus, the apparatus comprising:

A sending module, configured to send downlink control information DCI to a terminal device, where the DCI is used to schedule a network of a multicast broadcast service MBS

And the indication information and/or the configuration information of the DCI are used for determining the propagation mode of the MBS.

A fifth aspect of the present application provides a terminal device, comprising:

A processor, a memory, a transmitter, and an interface for communicating with a terminal device;

the memory stores computer-executable instructions;

the processor executes computer-executable instructions stored by the memory to cause the processor to perform the communication method as described in the first aspect.

A sixth aspect of the present application provides a network device, comprising:

the memory stores computer-executable instructions;

The processor executes computer-executable instructions stored by the memory to cause the processor to perform the communication method as described in the second aspect.

A seventh aspect of the present application provides a chip comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method according to the first aspect.

An eighth aspect of the present application provides a chip comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method as described in the second aspect.

A ninth aspect of the application provides a computer-readable storage medium storing a computer program for causing a computer to perform the method according to the first aspect.

A tenth aspect of the application provides a computer readable storage medium storing a computer program for causing a computer to perform the method according to the second aspect.

An eleventh aspect of the application provides a computer program product comprising computer instructions which, when executed by a processor, implement a method as described in the first aspect.

A twelfth aspect of the application provides a computer program product comprising computer instructions which, when executed by a processor, implement the method according to the second aspect.

A seventh aspect of the application provides a computer program for causing a computer to perform the method as set forth in the thirteenth aspect.

A seventh aspect of the application provides a computer program for causing a computer to perform the method according to the fourteenth aspect.

A fifteenth aspect of the present application provides an apparatus, the apparatus may comprise: at least one processor and interface circuitry, the program instructions involved being executed in the at least one processor to cause the communication device to carry out the method as described in the first aspect.

A sixteenth aspect of the present application provides an apparatus, which may comprise: at least one processor and interface circuitry, the program instructions involved being executable in the at least one processor to cause the communication device to implement the method as described in the second aspect.

A seventeenth aspect of the application provides a communication device for performing the method of the first aspect.

An eighteenth aspect of the application provides a communication device for performing the method of the second aspect.

The communication method and device provided by the embodiment of the application are that the terminal equipment receives the downlink control information DCI, and the DCI is used for scheduling the physical downlink shared channel PDSCH of the multicast broadcast service MBS. And then, the terminal equipment determines the propagation mode of the MBS according to the indication information and/or the configuration information of the DCI. In this way, the terminal device can determine the propagation mode of the MBS through the indication information and/or the configuration information of the DCI, so that the terminal device can accurately decode the DCI.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description of the embodiments or the drawings used in the description of the prior art will be given in brief, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a bandwidth provided in an embodiment of the present application;

fig. 2 is a schematic diagram of another bandwidth provided by an embodiment of the present application;

fig. 3 is a schematic diagram of still another bandwidth provided by an embodiment of the present application;

fig. 4 is a schematic view of a communication method according to an embodiment of the present application;

fig. 5 is a signaling interaction diagram of a communication method according to an embodiment of the present application;

Fig. 6 is a signaling interaction diagram of another communication method according to an embodiment of the present application;

fig. 7 is a signaling interaction diagram of still another communication method according to an embodiment of the present application;

fig. 8 is a signaling interaction diagram of yet another communication method according to an embodiment of the present application;

fig. 9 is a signaling interaction diagram of yet another communication method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 11 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terms first, second and the like in the description of embodiments of the application, in the claims and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Currently, the third generation partnership project (3rd Generation Partnership Project,3GPP) international standards organization begins to develop fifth generation mobile communications technology (5th Generation Mobile Communication Technology,5G) with the pursuit of speed, delay, high speed mobility, energy efficiency, and diversity, complexity requirements of future life services. The main application scenarios of 5G include enhanced mobile Ultra-wideband (Enhanced Mobile Broadband, eMBB), low latency high reliability communications (Ultra-reliable and Low Latency Communications, URLLC), large scale machine class communications (MASSIVE MACHINE TYPE Communication, mMTC).

Wherein eMBB still aims at obtaining multimedia content, services and data by users, the demand of which is growing very rapidly. On the other hand, eMBB may be deployed in different scenarios, such as indoor, urban, rural, etc., where the capability and demand are also quite different, so detailed analysis must be performed in conjunction with a specific deployment scenario. Typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety guarantee and the like. Typical features of mMTC include: high connection density, small data volume, delay insensitive traffic, low cost and long service life of the module, etc.

The New air interface (NR) of 5G may be deployed independently, and in the 5G network environment, in order to reduce air interface signaling and quickly restore wireless connection, a New RRC state, namely, an RRC INACTIVE (INACTIVE) state, is defined, and the RRC INACTIVE state is different from an RRC IDLE (IDLE) state and an RRC ACTIVE (ACTIVE) state as follows:

RRC IDLE state: mobility is cell selection reselection based on terminal equipment, paging is initiated by core network equipment, and paging areas are configured by the core network equipment. The Access network device side has no Access Stratum (AS) context of the terminal device, and no RRC connection exists.

RRC CONNECTED state: there is an RRC connection and the access network device and the terminal device have a terminal device AS context. The network side knows that the location of the terminal device is cell specific. Mobility is network-side controlled mobility. Unicast data may be transmitted between the terminal device and the access network device.

RRC INACTIVE state: mobility is cell selection reselection based on terminal equipment, connection between core network equipment and a new air interface exists, AS context of the terminal equipment exists on certain access network equipment, paging is triggered by an infinite access network (Radio Access Network, RAN), paging area based on the RAN is managed by the RAN, and a network side knows that the position of the terminal equipment is based on the level of the paging area of the RAN.

In 5G, the maximum channel bandwidth may be 400MHZ, which is large compared to the maximum 20M bandwidth of long term evolution technology (Long Term Evolution, LTE). If the terminal device keeps working on the wideband carrier, the power consumption of the terminal device is larger, and the Radio Frequency (RF) of the terminal device can be adjusted according to the actual throughput of the terminal device. An incentive for the bandwidth segment (Band WIDTH PART, BWP) is introduced for this to optimize the power consumption of the terminal equipment.

Exemplary, fig. 1 is a schematic diagram of bandwidth provided in the embodiment of the present application, as shown in fig. 1, if the rate of the terminal device is low, a smaller bandwidth may be configured for the terminal device. Fig. 2 is another schematic bandwidth diagram provided in the embodiment of the present application, as shown in fig. 2, if the rate of the terminal device is higher, a higher bandwidth may be configured for the terminal device. Fig. 3 is a schematic diagram of still another bandwidth provided by an embodiment of the present application, as shown in fig. 3, if the terminal device supports a high rate, or operates in a carrier aggregation (Carrier Aggregation, CA) mode, multiple BWPs may be configured.

Furthermore, it should be appreciated that another purpose of BWP is to trigger coexistence of multiple basic parameter sets (numerology) in one cell. The terminal device in the idle state or in the active state currently resides on an initial (active) BWP, which is visible to the terminal device in the idle state or in the active state, within which BWP information such as a master information block (Master Information Block, MIB), remaining minimum system information (REMAINING MINIMUM SYSTEM INFORMATION, RMSI), OSI other system information (Other System Information, OSI), paging (paging) and the like can be acquired.

The following description is made for multimedia broadcast multicast service (Multimedia Broadcast Multicast Service, MBMS) and point-to-multipoint (SINGLE CELL Point To Multiploint, SC-PTM) systems in LTE.

MBMS is a technology for transmitting data from one data source to a plurality of user equipments through a shared network resource, and is capable of realizing broadcasting and multicasting of multimedia services at a higher rate (256 kbps) while providing multimedia services by effectively utilizing the network resource.

Due to the low MBMS spectrum efficiency, it is not sufficient to effectively carry and support the operation of the mobile tv type service. In the radio access network LTE project, 3GPP has therefore explicitly proposed to enhance the support capability for downlink high-speed multimedia broadcast multicast service services and to determine the design requirements for the physical layer and the air interface.

The enhanced multimedia broadcast multicast service (Enhanced Multimedia Broadcast Multicast Service, E-MBMS) proposes the concept of a single frequency network (Single Frequency Network, SFN), i.e. to transmit data simultaneously in all cells using a unified frequency, but to guarantee synchronization between cells. The single frequency network can greatly improve the overall signal-to-noise ratio distribution and the spectrum efficiency of the cell, and realize the broadcasting and the multicasting of the service based on an internet protocol (Internet Protocol, IP) multicasting protocol.

In LTE/LTE-a, MBMS has only a broadcast bearer mode and no multicast bearer mode. The reception of the MBMS service is applicable to the UE in the rrc_connected or rrc_idle state.

In 3GPP R13, SC-PTM is introduced, the SC-PTM is based on MBMS network architecture, and multicast coordination entity (Multi-cell/multicast Coordination Entity, MCE) decides whether to adopt an SC-PTM transmission mode or a multicast broadcast single frequency network (Multimedia Broadcast multicast SERVICE SINGLE Frequency Network, MBSFN) transmission mode.

In some embodiments, a new logical channel single-cell multicast control channel (SINGLE CELL Multicast Control Channel, SC-MCCH) (lcid=11001) and single-cell multicast transport channel (SINGLE CELL Multicast Transport Channel, SC-MTCH) (lcid=11001) are introduced, mapped onto a Downlink shared channel (DL-SCH, downlink SHARED CHANNEL) and a physical Downlink shared channel (Physical Downlink SHARED CHANNEL, PDSCH). The SC-MCCH and SC-MTCH do not support hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) operations.

In some embodiments, a new system information block (System Information Block, SIB) type SIB20 is introduced to transmit configuration information of the SC-MCCH, and one cell has only one SC-MCCH. The configuration information includes modification period, repetition period, radio frame and subframe configuration information of the SC-MCCH.

Wherein, the radio frame of the SC-MCCH scheduling is SFN mod MCCH-RepetitionPeriod = MCCH-Offset. The subframes for SC-MCCH scheduling are indicated by SC-MCCH-Subframe. The SC-MCCH transmits only one message (SCPTMConfiguration) for configuring configuration information of the SC-PTM.

In some embodiments, a new single cell radio network temporary identity (SINGLE CELL RNTI, SC-RNTI) (fixed value FFFC) is introduced to identify scheduling information of SC-MCCH on PDCCH. The change notification is indicated with one bit of 8 bits in DCI 1C. The modification period boundary is defined as SFN mod m=0, where m is the modification period (sc-mcch-ModificationPeriod) configured in SIB 20.

In NR, the radio link layer control protocol (Radio Link Control, RLC) AM mode has an Automatic Repeat-reQuest (ARQ) feedback mechanism. The receiving end sends RLC status report to feed back the receiving status of the RLC packet as acknowledgement (Acknowledge character, ACK) or non-acknowledgement (Negative Acknowledge character, ACK) NACK. The transmitting end may repeatedly transmit the RLC packet of the SN number of the feedback NACK.

The configuration of BWP is explained below.

The downstream BWP is configured by BWP-Downlink parameters, which may include, in some embodiments, an Id of BWP-Id field identifying the current BWP, BWP-Common for configuring the Common parameters of the downstream BWP. In other embodiments, GENERICPARAMETERS in the BWP-DownlinkCommon parameters is used to configure the frequency domain starting point of the downlink BWP and the number of PRBs involved. For a terminal-specific unicast BWP, the BWP-decoded parameter in BWP-Downlink will configure the Downlink reception parameters on the Downlink BWP, including at least pdcch-Config, pdsch-Config, and sps-Config. Wherein PDCCH-Config is used to indicate the PDCCH transmission mode on the downlink BWP, PDSCH-Config is used to indicate the PDSCH transmission mode on the downlink BWP, and SPS-Config is used to indicate the SPS configuration on the downlink BWP.

The propagation mode for NR MBS is described below.

For MBS services, the parties that network devices schedule transmissions include three.

In the first manner, MBS services may be transmitted by broadcasting. The method is suitable for the terminal equipment to be in the RRC IDLE state or RRC INACTIVE state and the terminal equipment to be in the RRC CONNECTED state. That is, through the MBS service transmitted by broadcasting, no matter what link state the terminal device is in, only the terminal device needs to be guaranteed to be able to receive in the coverage area.

In the second manner, MBS services may be transmitted through multicast. The method is suitable for the terminals in the group to be in the RRC CONNECTED state, and the network equipment sends the same MBS service to a group of terminal equipment through the PTM sending method.

In the third mode, the MBS service may be transmitted through a unicast mode. The method is suitable for the terminals in the RRC CONNECTED state, and the network equipment sends the same MBS service to each terminal equipment through a one-to-one (PTP) sending method.

The following describes the NR MBS group scheduling mode.

In the NR MBS supporting one-to-many multicast transmission, in the one-to-many multicast transmission mode, the network device needs to schedule a common PDSCH by transmitting a common downlink control channel (Physical Downlink Control Channel, PDCCH), where the common PDCCH and the common PDSCH are transmitted in a common frequency domain range (CFR, common Frequency Resource). Currently, there are two alternative CFR configurations:

In the first CFR configuration, the CFR is configured as an MBS-specific BWP, the MBS-specific BWP is associated with a terminal-specific unicast BWP, and the subcarrier spacing and cyclic prefix configured on the CFR are the same as the configuration on the terminal-specific unicast BWP.

It should be appreciated that in the first approach, CFR may follow existing BWP signaling configurations, which is advantageous to reduce the standard workload. However, since CFR is defined as BWP, if a terminal device is required to receive unicast in dedicated unicast BWP and multicast in CFR at the same time, the terminal needs to receive downlink transmission on two BWP at the same time, whereas the terminal has the capability to receive downlink on only one BWP at a given moment. Furthermore, even if the terminal device receives unicast and multicast at different times, BWP handover delay is introduced because both are located at different BWP.

In a second CFR configuration, the CFR is configured as a plurality of physical resource blocks (Physical Resource Block, PRBs) contiguous within the terminal-specific unicast BWP range.

It should be understood that, in the second manner, the problem of BWP handover can be avoided, but since the CFR is a plurality of consecutive PRBs in the second manner, the existing BWP-based signaling configuration cannot be used, and the configuration manners of the resource range, the uplink and downlink transmission parameters, and the like of the CFR need to be redesigned, which has a great influence on the standard.

In addition, since the common PDCCH for scheduling the common PDSCH needs to be simultaneously transmitted to a plurality of receiving terminals, in order to ensure that the number of bits of the common DCI carried in the common PDCCH determined by a plurality of terminal devices is the same, the terminal devices cannot determine the number of bits of the common DCI according to the configuration of the respective dedicated unicast BWP. In addition, since the number of PRBs of the CFR may be different from the initial BWP or CORESET #0 (Control Resource SET 0) currently configured by the terminal, the terminal cannot determine the number of bits of the common DCI through the initial BWP or CORESET #0. Therefore, it is inevitable that the number of bits of the common DCI may be different from the number of DCI bits received by the terminal device in the existing Common Search Space (CSS) and the user specific search space (USS). In order to reduce the implementation complexity of the terminal equipment, at present, the terminal equipment can only receive DCIs with 4 different bit numbers in one cell at most. Wherein the number of DCI bits scrambled by a cell radio network temporary identifier (Cell Radio Network Temporary Identifier, C-RNTI) is not more than 3.

The transmission MBS service comprises three scheduling modes including PTM1, PTM2 and PTP.

In PTM 1, a group shared PDCCH may be used to schedule a group shared PDSCH for a plurality of terminal devices in the same group in a connected state. Wherein, CRC of the group sharing PDCCH is scrambled by using the group sharing RNTI, and the group sharing PDSCH is scrambled by using the same group sharing RNTI.

In PTM2, PDSCH is shared for each terminal device by using a terminal device-specific PDCCH scheduling group for a plurality of terminal devices in the same group in a connected state. Wherein, CRC of the terminal equipment dedicated PDCCH is scrambled by using terminal equipment dedicated RNTI (namely C-RNTI), and the group shared PDSCH is scrambled by using group shared RNTI.

In PTP, for a connected terminal device, a terminal device dedicated PDCCH is used for each terminal device to schedule a terminal device dedicated PDSCH. Wherein the CRC of the terminal equipment specific PDCCH is scrambled by using a terminal equipment specific RNTI (namely C-RNTI), and the terminal equipment specific PDSCH is scrambled by using a terminal equipment specific RNTI (namely C-RNTI).

It should be appreciated that PTM1 and PTP are already supported. The group shared PDCCH or PDSCH refers to a PDCCH or PDSCH transmitted by a network device on a set of time-frequency resources, and can be received by multiple terminal devices of the same group. It should be noted that, in the embodiment of the present application, PTM scheduling methods refer to PTM1.

It should be understood that, in the connection state, the retransmission mechanism based on HARQ-ACK feedback supports the manner of initially transmitting ptm1+retransmitting PTM1, or supports the manner of initially transmitting ptm1+retransmitting PTP.

In the related art, the same DCI format (format 1_0 or format 1_1) is used for DCI by broadcast scheduling MBS as for DCI by multicast scheduling MBS. Whichever DCI format is employed, the information fields in the DCI may be different depending on the configuration at the time of broadcast and multicast transmission.

For broadcasting, in the current system, the broadcasting transmission mode is mainly used for transmitting system messages to the coverage cell by the network, and is mainly oriented to all terminal users in a non-connection state/connection state. Thus, the information of the format, size, control resource set, search space, etc. of the transmitted DCI is commonly known to the terminal device. The terminal equipment only needs to blindly detect and decode the corresponding received PDCCH according to the established rule, and no mismatch condition exists.

For unicast, in the current system, the network and the terminal equipment in a connection state adopt one-to-one communication, the CRC of DCI adopts the terminal exclusive representation C-RNTI to scramble, and the network also configures an exclusive search space for the terminal equipment. Therefore, the terminal equipment knows related information in advance when blind detection and decoding PDCCH, and no problem occurs.

In the current system, transmission of MBS service is not supported, and thus, there is no distinction between whether PDCCH is used for scheduling broadcast or multicast.

For MBS services, whether broadcast or multicast, are sent towards a group of terminal equipments. Thus, to ensure that the terminal devices are both correctly received and decoded, the relevant information and configuration are common between the terminal devices. When receiving the MBS service, the terminal equipment in RRC IDLE state or RRC INACTIVE state can only receive the MBS service in a broadcast mode because the terminal equipment does not enter a connection state, and therefore, the received DCI is decoded according to a DCI format used for scheduling broadcast and a corresponding information domain.

However, the broadcast-transmitted MBS may be received by not only the terminal device in the RRC IDLE state or RRC INACTIVE state but also the terminal device in the RRC CONNECTED state. When receiving MBS service, the RRC CONNECTED terminal device cannot determine whether the received DCI is DCI for broadcast transmission MBS or DCI for multicast transmission MBS.

Because, the CRC check of the PDCCH of the broadcast and multicast transmission MBS is scrambled by adopting the GC-RNTI, and the DCI propagation mode cannot be known by descrambling the GC-RNTI alone. Since the bit sizes of the DCI for scheduling broadcast and the DCI for scheduling multicast are different from each other, the terminal device does not know which DCI is used to interpret the content of the information field in the DCI, and in the current design, how to distinguish whether the DCI is an MBS for scheduling broadcast transmission or an MBS for multicast transmission is not considered, which may result in incorrect decoding of the DCI.

For example, table 1 is an information domain lookup table for DCI scheduling MBS broadcast and scheduling MBS multicast. As shown in table 1, DCI sizes (sizes) for scheduling MBS broadcasting and scheduling MBS multicasting are identical. However, the information fields contained in DCI and the size of each information field are not necessarily uniform. And both DCIs scramble the CRC with either G-RNTI or G-CS-RNTI. Therefore, when the terminal device performs PDCCH blind detection, it can only know whether the DCI is for scheduling MBS service, but cannot know whether the DCI is for scheduling broadcast or for scheduling multicast, and the terminal device cannot determine which mode should be used to decode the DCI. If the terminal device presumes one of the methods to decode, the content of the decoded DCI is inconsistent with that of the DCI transmitted by the network, and incorrect decoding results in failure to correctly decode the PDSCH scheduled by the PDCCH, which further results in a decrease in system reliability.

TABLE 1

In order to solve the above problems, embodiments of the present application provide a communication method and apparatus, where a terminal device determines a propagation method of an MBS through indication information and/or configuration information of DCI, so that a decoding method of the DCI may be determined according to the propagation method of the MBS, and further the DCI may be accurately decoded.

The following illustrates an application scenario of the present application.

Fig. 4 is a schematic view of a communication method according to an embodiment of the present application. As shown in fig. 3, communication between the network device 102 and the terminal device 101 is performed. The network device 102 transmits DCI to the terminal device 101 to schedule PDSCH of MBS. After receiving the DCI, the terminal device 101 may determine a propagation manner of the MBS according to the indication information and/or the configuration information of the DCI. Subsequently, the terminal device 101 may further determine the decoding method of the DCI according to the propagation method of the MBS.

Wherein the terminal device 101 includes, but is not limited to, a satellite or cellular telephone, a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that may include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal device may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.

Network device 102 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. Alternatively, the network device 102 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

The technical solutions of the embodiments of the present application will be described in detail with specific embodiments by taking communication devices such as a terminal device and a network device as examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Fig. 5 is a signaling interaction diagram of a communication method according to an embodiment of the present application. Embodiments of the present application relate to a process of how to perform side-link awareness. As shown in fig. 5, the method includes:

S201, a network device sends downlink control information DCI to a terminal device, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS.

S202, the terminal equipment determines the propagation mode of the MBS according to the indication information and/or the configuration information of the DCI.

In the embodiment of the present application, when the terminal device receives the DCI transmitted by the terminal device, the terminal device may identify whether the DCI is used for scheduling the PDSCH of the broadcast or the PDSCH of the multicast.

In some embodiments, after determining whether the DCI is a PDSCH for scheduling broadcast or a PDSCH for scheduling multicast, the terminal device may further determine a DCI format corresponding to a propagation mode of the MBS and decode the DCI according to the DCI format corresponding to the propagation mode of the MBS.

Wherein, the DCI format includes format content and size of DCI. The propagation modes of DCI include broadcast and multicast, which may be understood as multicast or multicast.

It should be understood that the embodiments of the present application are not limited to how to determine the propagation modes of MBS, and the following exemplary methods for determining the propagation modes of MBS are provided.

In a first method, the indication information of the DCI includes an information field in the DCI for indicating whether the DCI is used to schedule a broadcasted PDSCH or a multicasted PDSCH.

It should be understood that, in the embodiment of the present application, the size of the information field in the DCI is not limited, and may be 1 bit or multiple bits. The embodiment of the application does not limit the type of the information domain in the DCI, can be used for exclusive information domain indication, and can also be used for multiplexing the existing information domain.

In some embodiments, if the information field contains one bit, two valued states of one bit are used to indicate that DCI is used to schedule a broadcasted PDSCH or a multicast PDSCH, respectively.

Illustratively, in the information field of one bit, as shown in table 2, a value of 0 of the bit may be used to indicate that DCI is used for scheduling the PDSCH of the broadcast, and a value of 1 of the bit may be used to indicate that DCI is used for the PDSCH of the multicast. Or in the information field of one bit, as shown in table 3, a value of 1 of the bit may be used to indicate that DCI is used to schedule a PDSCH for broadcasting and a value of 0 of the bit may be used to indicate that DCI is used for a PDSCH for multicasting.

TABLE 2

1 Bit of information	Indicating content
0	PDSCH for scheduling broadcast
1	PDSCH for scheduling multicast

TABLE 3 Table 3

1 Bit of information	Indicating content
1	PDSCH for scheduling broadcast
0	PDSCH for scheduling multicast

Alternatively, one bit in the information domain may be located at any position in all information domains of the DCI, and preferably, may be located at the first bit in all information domains of the DCI.

It should be noted that the one-bit information field may be a dedicated information field or an existing information field. If a dedicated information field, the information field may be dedicated to broadcast or multicast indications. If an existing information field, it may include, but is not limited to, DCI format indication (1 bit), virtual resource block to physical resource block (VRB-to-PRB) mapping (1 bit), or other information fields.

In other embodiments, if the information field includes a plurality of bits, two value states of a target bit in the plurality of bits are respectively used to indicate that the DCI is used to schedule the PDSCH of the broadcast or the PDSCH of the multicast, or preset value states of the plurality of bits are respectively used to indicate that the DCI is used to schedule the PDSCH of the broadcast or the PDSCH of the multicast.

In some embodiments, the target bit may be any bit of a multi-bit, e.g., the first bit. For example, 1 bit of the multiple bits may individually indicate DCI for scheduling a broadcasted PDSCH or a multicasted PDSCH. As shown in table 4, when the value of the first bit in the multiple bits is 0, DCI may be indicated to schedule a PDSCH for broadcasting, and when the value of the first bit in the multiple bits is 1, DCI may be indicated to schedule a PDSCH for multicasting.

TABLE 4 Table 4

In some embodiments, the preset value state of the target bit may be a multiplexed value state of multiple bits.

For example, one or several states in the multiple bits correspond to whether DCI is used to schedule a broadcast PDSCH or a multicast PDSCH. As shown in table 4, the valued states 000, 001, 010, and 011 of the multi-bit information field are used to indicate DCI for scheduling a PDSCH of a broadcast. The value states 100, 101, 110 and 111 of the bit information field are used to indicate DCI for scheduling a multicast PDSCH.

In other embodiments, the preset state of the target bit may be a reserved state of the multiple bits.

For example, if only a part of the value states are used in one information field of the original DCI, the other value states are not used. Under the condition of ensuring that the original value state is not changed, the reserved two value states can be utilized to indicate different DCI scheduling modes. As shown in table 5, the reserved value state 110 is used to indicate that DCI is used to schedule a broadcasted PDSCH, and the reserved value state 111 is used to indicate that DCI is used to schedule a multicasted PDSCH.

TABLE 5

In a second method, the configuration information of the DCI includes a radio network temporary identity (Radio Network Tempory Identity, RNTI) RNTI corresponding to a cyclic redundancy check (Cyclic Redundancy Check, CRC) of a physical downlink control channel (Physical Downlink Control Channel, PDCCH), different RNTIs being used to indicate whether the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH, respectively.

In some embodiments, when the CRC of the PDCCH format 1_x is scrambled with Y-RNTIs and the total number of Y-RNTIs supported by the system is M, the number of Y-RNTIs for scheduling MBS broadcast transmissions may be set to K and the number of Y-RNTIs for scheduling MBS multicast may be set to L.

Wherein K is less than or equal to M, L is less than or equal to M, K+L is less than or equal to M, and K/L/M is an integer greater than or equal to 0. DCI format 1_x includes, but is not limited to: DCI formats 1_0, 1_1, 1_2. The Y-RNTI may be a group radio network temporary identity (G-RNTI), a group configuration scheduling radio network temporary identity (G-CS-RNTI), or other RNTI that schedules the MBS.

For example, if the maximum number of G-RNTIs supported by the system is 128, the 1 st to 64 th G-RNTIs correspond to DCI for scheduling the PDSCH of the broadcast, and the 65 th to 128 th G-RNTIs correspond to DCI for scheduling the PDSCH of the multicast. After receiving the PDCCH, the terminal equipment can acquire whether the DCI is used for scheduling the broadcasted PDSCH or the multicast PDSCH through descrambling the G-RNTI corresponding to the CRC, and then decodes the DCI according to the content and the size of the DCI format corresponding to the broadcast or the multicast to acquire the downlink control information.

In some embodiments, the propagation manner of the MBS indicated by the RNTI is divided according to the type of RNTI.

For example, when the CRC of PDCCH format 1_x is scrambled with a Y-RNTI, the Y-RNTI is exclusively used for scheduling of MBS broadcasting; and/or, when the CRC of PDCCH format 1_x is scrambled with a Z-RNTI, the Z-RNTI is exclusively used for scheduling MBS multicast. Wherein the Y-RNTI and the Z-RNTI are different RNTIs.

In a third method, the configuration information of the DCI further includes a set of control resources used for scheduling the PDCCH, different sets of control resources being used for associating the DCI scheduled broadcast PDSCH or multicast PDSCH, respectively.

For example, PDCCH for scheduling MBS broadcast uses CORESET #1, and corresponding CORESET #1 is associated with DCI scheduled broadcast PDSCH. The PDCCH used to schedule MBS multicasting uses CORESET #2, and the corresponding CORESET #2 is associated with the DCI-scheduled multicasting PDSCH. The terminal device may obtain the monitored PDCCH according to different CORESET to determine whether the current PDCCH is suitable for broadcasting or broadcasting. And then decoding DCI according to the content and the size of the DCI format corresponding to the corresponding broadcast or multicast to obtain downlink control information.

In the fourth method, the configuration information of the DCI further includes a search space corresponding to the scheduling PDCCH, and different search spaces are used to associate a broadcast PDSCH or a multicast PDSCH scheduled by the DCI, respectively.

It should be understood that the PDCCH corresponding to the broadcast PDSCH of the DCI schedule and the PDCCH corresponding to the multicast PDSCH of the DCI schedule do not occur in the same or the same search space.

In some embodiments, the propagation manner of the search space-associated MBS is divided according to the type of search space. The types of search spaces include public search spaces, proprietary search spaces, or business-proprietary search spaces.

For example, the dedicated search space of the MBS service may be a dedicated search space configured to receive the PDCCH for scheduling the MBS service when receiving the multicast service in a connected state.

In other embodiments, the propagation manner of the MBS associated with the search space is divided according to a preset frequency domain location.

For example, the frequency domain location corresponding to the propagation mode of the MBS broadcast is a specific location, and the frequency domain size is CORESET #0 or the DL BWP configured by SIB 1. The terminal device in the connected state can determine that it is used for scheduling MBS broadcasting as long as the PDCCH (CRC scrambled with Y-RNTI) is received at the specific frequency domain location. The PDCCH received in a search space other than the specific location (CRC scrambled with Y-RNTI) may be determined to be used for scheduling MBS multicast. And then, decoding DCI according to the content and the size of the DCI format corresponding to broadcasting or multicasting to acquire downlink control information.

It should be noted that, the above four propagation modes for determining the MBS do not limit the application, and any other modes may be adopted to determine the propagation mode of the MBS through the indication information and/or the configuration information.

According to the communication method provided by the embodiment of the application, by introducing the identification of the propagation mode of DCI, the confusion of DCI can be effectively avoided, especially, when the PDCCH is detected blindly for the connected terminal equipment, the error decoding can be avoided, the performance of the whole system is improved, and meanwhile, different information fields can be configured on the premise of the same length of broadcast DCI and multicast DCI, so that the MBS scheduling is more flexible.

In the communication method provided by the embodiment of the application, the terminal equipment receives the downlink control information DCI, and the DCI is used for scheduling the physical downlink shared channel PDSCH of the multicast broadcast service MBS. And then, the terminal equipment determines the propagation mode of the MBS according to the indication information and/or the configuration information of the DCI. In this way, the terminal device can determine the propagation mode of the MBS through the indication information and/or the configuration information of the DCI, so that the terminal device can accurately decode the DCI.

On the basis of the above embodiments, the following describes the above four methods in detail.

In a first method, the indication information of the DCI includes an information field in the DCI for indicating whether the DCI is used to schedule a broadcasted PDSCH or a multicasted PDSCH. Fig. 6 is a signaling interaction diagram of another communication method according to an embodiment of the present application, as shown in fig. 6, where the method includes:

S301, a terminal device receives downlink control information DCI, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS.

S302, the terminal equipment determines that the DCI is used for scheduling the broadcasted PDSCH or the multicasted PDSCH according to the information field in the DCI.

In one possible design, the propagation modes of MBS include broadcast and multicast.

In one possible design, if one bit is included in the information field, two value states of one bit are used to indicate that DCI is used to schedule a broadcast PDSCH or a multicast PDSCH, respectively.

In one possible design, one bit in the information field is located in the first bit in all information fields of the DCI.

In one possible design, if the information field includes a plurality of bits, two value states of a target bit in the plurality of bits are respectively used to indicate that the DCI is used to schedule the PDSCH of the broadcast or the PDSCH of the multicast, or preset value states of the plurality of bits are respectively used to indicate that the DCI is used to schedule the PDSCH of the broadcast or the PDSCH of the multicast.

In one possible design, the preset value state is a value state multiplexed in the information domain or a value state reserved in the information domain.

In one possible design, the information domain is a dedicated information domain of the propagation mode of the MBS or an information domain existing in the DCI.

In the second method, the configuration information of the DCI includes RNTIs corresponding to CRCs of the PDCCHs, and different RNTIs are used to indicate whether the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH, respectively. Fig. 7 is a signaling interaction diagram of another communication method according to an embodiment of the present application, as shown in fig. 7, where the method includes:

S401, the terminal equipment receives downlink control information DCI, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS.

S402, the terminal equipment determines that the DCI is used for scheduling the broadcasted PDSCH or the multicasted PDSCH according to the RNTI corresponding to the CRC of the PDCCH in the configuration information of the DCI.

In one possible design, the propagation mode of the MBS indicated by the RNTI is divided according to the type of RNTI.

In a third method, the configuration information of the DCI includes a set of control resources used to schedule the PDCCH, different sets of control resources being used to associate a broadcast PDSCH or a multicast PDSCH scheduled by the DCI, respectively. Fig. 8 is a signaling interaction diagram of another communication method according to an embodiment of the present application, as shown in fig. 8, where the method includes:

S501, a terminal device receives downlink control information DCI, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS.

S502, the terminal equipment determines that the DCI is used for scheduling the broadcasted PDSCH or the multicast PDSCH according to the control resource set used by the scheduling PDCCH in the configuration information of the DCI.

In a fourth method, the configuration information of the DCI includes a search space corresponding to the scheduling PDCCH, and different search spaces are used to associate a broadcast PDSCH or a multicast PDSCH scheduled by the DCI, respectively. Fig. 9 is a signaling interaction diagram of another communication method according to an embodiment of the present application, as shown in fig. 9, where the method includes:

s601, a terminal device receives downlink control information DCI, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS.

S602, the terminal equipment determines that the DCI is used for scheduling the broadcasted PDSCH or the multicast PDSCH according to the search space corresponding to the scheduling PDCCH in the configuration information of the DCI.

In one possible design, the propagation manner of the MBS associated with the search space is divided according to the type of the search space.

In one possible design, the types of search spaces include public search spaces, proprietary search spaces, or business-proprietary search spaces.

In one possible design, the propagation mode of the MBS associated with the search space is divided according to a preset frequency domain position.

Fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus may be implemented by software, hardware, or a combination of both to perform the communication method at the terminal device side in the above embodiment. As shown in fig. 10, the communication apparatus 700 includes: a receiving module 701 and a processing module 702.

A receiving module 701, configured to receive downlink control information DCI, where the DCI is used to schedule a network physical downlink shared channel PDSCH of a multicast broadcast service MBS;

the processing module 702 is configured to determine a propagation mode of the MBS according to the indication information and/or the configuration information of the DCI.

In an alternative embodiment, the propagation modes of MBS include broadcast and multicast.

In an alternative embodiment, the indication information of the DCI includes an information field in the DCI, where the information field in the DCI is used to indicate whether the DCI is used to schedule a broadcasted PDSCH or a multicasted PDSCH.

In an alternative embodiment, if the information field contains one bit, two value states of one bit are used to indicate that DCI is used to schedule a broadcast PDSCH or a multicast PDSCH, respectively.

In an alternative embodiment, if the information field includes a plurality of bits, two value states of a target bit in the plurality of bits are respectively used to indicate that the DCI is used to schedule the PDSCH of the broadcast or the PDSCH of the multicast, or preset value states of the plurality of bits are respectively used to indicate that the DCI is used to schedule the PDSCH of the broadcast or the PDSCH of the multicast.

In an alternative embodiment, the configuration information of the DCI includes a radio network temporary identifier RNTI corresponding to a cyclic redundancy check CRC of a physical downlink control channel PDCCH, and different RNTIs are used to indicate that the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH, respectively.

In an alternative embodiment, the configuration information of the DCI further includes a set of control resources used for scheduling the PDCCH, different sets of control resources being used for associating the broadcasted PDSCH or the multicasted PDSCH, respectively, of the DCI schedule.

In an optional embodiment, the configuration information of the DCI further includes a search space corresponding to the scheduling PDCCH, and different search spaces are used to associate a broadcast PDSCH or a multicast PDSCH scheduled by the DCI, respectively.

In an alternative embodiment, the type of search space includes a public search space, a private search space, or a business-private search space.

In an alternative embodiment, the processing module 702 is further configured to determine a DCI format corresponding to a propagation mode of the MBS.

In an alternative embodiment, the processing module 702 is further configured to decode the DCI according to a DCI format corresponding to the propagation mode of the MBS.

The communication device provided by the embodiment of the present application may perform the actions of the communication method at the terminal device side in the above embodiment, and its implementation principle and technical effects are similar, and will not be described herein.

Fig. 11 is a schematic structural diagram of another communication device according to an embodiment of the present application. The communication apparatus may be implemented by software, hardware, or a combination of both to perform the communication method on the network device side in the above embodiment. As shown in fig. 11, the communication apparatus 800 includes: a storage module 801 and a transmission module 802.

The storage module 801 is used for storing executable programs.

A sending module 802, configured to send downlink control information DCI to a terminal device, where the DCI is used to schedule a network of a multicast broadcast service MBS

The physical downlink shared channel PDSCH, the indication information and/or the configuration information of the DCI are used for determining the propagation mode of the MBS.

The communication device provided in the embodiment of the present application may perform the actions of the communication method on the network device side in the above embodiment, and its implementation principle and technical effects are similar, and are not described herein again.

Fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in fig. 12, the electronic device may include: a processor 91 (e.g., a CPU), a memory 92, a receiver 93, and a transmitter 94; the receiver 93 and the transmitter 94 are coupled to the processor 91, the processor 91 controlling the receiving action of the receiver 93, the processor 91 controlling the transmitting action of the transmitter 94. The memory 92 may comprise a high-speed RAM memory or may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, in which various information may be stored in the memory 92 for performing various processing functions and implementing method steps of embodiments of the application. Optionally, the electronic device according to the embodiment of the present application may further include: a power supply 95, a communication bus 96 and a communication port 97. The receiver 93 and the transmitter 94 may be integrated in a transceiver of the electronic device or may be separate transceiver antennas on the electronic device. The communication bus 96 is used to enable communication connections between the elements. The communication port 97 is used for implementing connection communication between the electronic device and other peripheral devices.

In the embodiment of the present application, the memory 92 is used for storing computer executable program codes, and the program codes include information; when the processor 91 executes the information, the information causes the processor 91 to execute the processing action on the terminal device side in the above method embodiment, causes the transmitter 94 to execute the sending action on the terminal device side in the above method embodiment, and causes the receiver 93 to execute the receiving action on the terminal device side in the above method embodiment, so that the implementation principle and technical effects are similar, and are not repeated here.

Or when the processor 91 executes the information, the information causes the processor 91 to execute the processing action on the network device side in the above method embodiment, causes the transmitter 94 to execute the sending action on the network device side in the above method embodiment, and causes the receiver 93 to execute the receiving action on the network device side in the above method embodiment, so that the implementation principle and technical effects are similar, and are not repeated herein.

The embodiment of the application also provides a communication system which comprises the target terminal, the auxiliary terminal and the network equipment so as to execute the communication method.

The embodiment of the application also provides a chip which comprises a processor and an interface. Wherein the interface is used for inputting and outputting data or instructions processed by the processor. The processor is configured to perform the methods provided in the method embodiments above. The chip can be applied to the communication device.

The present invention also provides a computer-readable storage medium, which may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random-access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, etc., in which program codes can be stored, and in particular, the computer-readable storage medium stores program information for the above communication method.

The embodiment of the present application also provides a program for executing the communication method provided by the above method embodiment when executed by a processor.

The present application also provides a program product, such as a computer-readable storage medium, having instructions stored therein, which when run on a computer, cause the computer to perform the communication method provided by the above-described method embodiments.

The embodiment of the application also provides a device, which can comprise: at least one processor and interface circuitry, program instructions being involved to be executed in the at least one processor to cause the communication device to implement the communication method provided by the above-described method embodiments.

The embodiment of the application also provides a communication device which is used for executing the communication method provided by the embodiment of the method.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present invention are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.) means from one website, computer, server, or data center. Computer readable storage media can be any available media that can be accessed by a computer or data storage devices such as servers, data centers, etc. that contain an integration of one or more of the available media. Usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., solid state disk Solid STATE DISK (SSD)), among others.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

A method of communication, comprising:

The method comprises the steps that a terminal device receives downlink control information DCI, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS;

and the terminal equipment determines the propagation mode of the MBS according to the indication information and/or the configuration information of the DCI.
The method of claim 1, wherein the propagation mode of the MBS comprises broadcast and multicast.
The method of claim 2, wherein the indication information of the DCI includes an information field in the DCI for indicating whether the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH.
The method of claim 3, wherein if one bit is included in the information field, two valued states of the one bit are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The method of claim 4, wherein one bit in the information field is located in a first bit in all information fields of the DCI.
The method of claim 3, wherein if a plurality of bits are included in the information field, two value states of a target bit of the plurality of bits are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively, or a preset value state of the plurality of bits is used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The method of claim 6, wherein the preset value state is a multiplexed value state in the information domain or a reserved value state in the information domain.
The method according to any of claims 3-7, wherein the information field is a dedicated information field of a propagation mode of the MBS or an information field existing in the DCI.
The method of claim 2, wherein the configuration information of the DCI includes a radio network temporary identity, RNTI, corresponding to a cyclic redundancy check, CRC, of a physical downlink control channel, PDCCH, different RNTIs being used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The method of claim 9, wherein the propagation manner of the MBS indicated by the RNTI is divided according to a type of the RNTI.
The method of claim 2, wherein the configuration information of the DCI further includes a set of control resources used to schedule a PDCCH, different sets of control resources being used to associate the broadcasted PDSCH or the multicasted PDSCH, respectively, scheduled by the DCI.
The method of claim 2, wherein the configuration information of the DCI further includes a search space corresponding to a scheduling PDCCH, different search spaces being used to associate the broadcasted PDSCH or the multicasted PDSCH scheduled by the DCI, respectively.
The method of claim 12, wherein propagation of the MBS associated with the search space is partitioned according to a type of the search space.
The method of claim 13, wherein the type of search space comprises a public search space, a private search space, or a business-private search space.
The method of claim 12 wherein propagation of the MBS associated with the search space is partitioned according to a preset frequency domain location.
The method according to any one of claims 1-15, wherein after the terminal device determines the propagation mode of the MBS according to the configuration information of the DCI, the method further comprises:

The terminal equipment determines a DCI format corresponding to the propagation mode of the MBS.
The method of claim 16, wherein after the terminal device determines the DCI format corresponding to the propagation mode of the MBS, the method further comprises:

and the terminal equipment decodes the DCI according to a DCI format corresponding to the propagation mode of the MBS.
A method of communication, comprising:

The network equipment sends downlink control information DCI to the terminal equipment, wherein the DCI is used for scheduling a physical downlink shared channel PDSCH of a multicast broadcast service MBS, and the indication information and/or the configuration information of the DCI are used for determining the propagation mode of the MBS.
The method of claim 18, wherein the propagation mode of the MBS comprises broadcast and multicast.
The method of claim 19, wherein the indication information of the DCI includes an information field in the DCI for indicating whether the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH.
The method of claim 20, wherein if the information field contains one bit, two valued states of the one bit are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The method of claim 21, wherein one bit in the information field is located in a first bit in all information fields of the DCI.
The method of claim 20, wherein if the information field contains a plurality of bits, two value states of a target bit of the plurality of bits are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively, or a preset value state of the plurality of bits is used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The method of claim 23, wherein the preset value state is a value state multiplexed in the information domain or a value state reserved in the information domain.
The method according to any of the claims 20-24, wherein the information field is a dedicated information field of a propagation mode of the MBS or an information field existing in the DCI.
The method of claim 19, wherein the configuration information of the DCI includes a radio network temporary identity, RNTI, corresponding to a cyclic redundancy check, CRC, of a physical downlink control channel, PDCCH, different RNTIs being used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The method of claim 26, wherein the propagation manner of the MBS indicated by the RNTI is divided according to a type of the RNTI.
The method of claim 19, wherein the configuration information of the DCI further includes a set of control resources used to schedule a PDCCH, different sets of control resources being used to associate the broadcasted PDSCH or the multicasted PDSCH, respectively, scheduled by the DCI.
The method of claim 19, wherein the configuration information of the DCI further includes a search space corresponding to a scheduling PDCCH, different search spaces being used to associate the broadcasted PDSCH or the multicasted PDSCH scheduled by the DCI, respectively.
The method of claim 29, wherein the propagation of MBS for the search space association is partitioned according to the type of search space.
The method of claim 30, wherein the type of search space comprises a public search space, a private search space, or a business-private search space.
The method of claim 29 wherein propagation of the MBS associated with the search space is partitioned according to a predetermined frequency domain location.
A communication device, comprising:

A receiving module, configured to receive downlink control information DCI, where the DCI is used to schedule a network physical downlink shared channel PDSCH of a multicast broadcast service MBS;

And the processing module is used for determining the propagation mode of the MBS according to the indication information and/or the configuration information of the DCI.
The apparatus of claim 33, wherein the propagation manner of the MBS comprises broadcast and multicast.
The apparatus of claim 34, wherein the indication information of the DCI comprises an information field in the DCI that indicates whether the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH.
The apparatus of claim 35, wherein if one bit is included in the information field, two valued states of the one bit are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The apparatus of claim 36, wherein one bit in the information field is located in a first bit in all information fields of the DCI.
The apparatus of claim 36, wherein if the information field includes a plurality of bits, two value states of a target bit of the plurality of bits are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively, or a preset value state of the plurality of bits is used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The apparatus of claim 38, wherein the preset value state is a multiplexed value state in the information domain or a reserved value state in the information domain.
The apparatus of any one of claims 35-39, wherein the information field is a dedicated information field of a propagation mode of the MBS or an information field existing in the DCI.
The apparatus of claim 34, wherein the configuration information of the DCI includes a radio network temporary identity, RNTI, corresponding to a cyclic redundancy check, CRC, of a physical downlink control channel, PDCCH, different RNTIs being used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The apparatus of claim 41, wherein the propagation manner of the MBS indicated by the RNTI is divided according to a type of the RNTI.
The apparatus of claim 34, wherein the configuration information of the DCI further comprises a set of control resources used to schedule PDCCH, different sets of control resources being used to associate the broadcasted PDSCH or the multicasted PDSCH, respectively, scheduled by the DCI.
The apparatus of claim 34, wherein the configuration information of the DCI further comprises a search space corresponding to a scheduling PDCCH, different search spaces being used for associating the broadcasted PDSCH or the multicasted PDSCH scheduled by the DCI, respectively.
The apparatus of claim 44, wherein the propagation manner of the MBS with which the search space is associated is partitioned according to a type of the search space.
The apparatus of claim 45, wherein the type of search space comprises a public search space, a private search space, or a business-private search space.
The apparatus of claim 44, wherein propagation modes of the MBS associated with the search space are partitioned according to preset frequency domain locations.
The apparatus of any one of claims 33-47, wherein the processing module is further configured to determine a DCI format corresponding to a propagation mode of the MBS.
The apparatus of claim 48, wherein the processing module is further configured to decode the DCI according to a DCI format corresponding to a propagation mode of the MBS.
A communication device, comprising:

A sending module, configured to send downlink control information DCI to a terminal device, where the DCI is used to schedule a network physical downlink shared channel PDSCH of a multicast broadcast service MBS, and the indication information and/or configuration information of the DCI is used to determine a propagation mode of the MBS.
The apparatus of claim 50, wherein the propagation mode of the MBS comprises broadcast and multicast.
The apparatus of claim 51, wherein the indication information of the DCI comprises an information field in the DCI indicating whether the DCI is used to schedule a broadcast PDSCH or a multicast PDSCH.
The apparatus of claim 52, wherein if one bit is included in the information field, two valued states of the one bit are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The apparatus of claim 53, wherein one bit in the information field is located in a first bit in all information fields of the DCI.
The apparatus of claim 52, wherein if a plurality of bits are included in the information field, two value states of a target bit of the plurality of bits are used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively, or a preset value state of the plurality of bits is used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The apparatus of claim 55, wherein the preset value state is a multiplexed value state in the information domain or a reserved value state in the information domain.
The apparatus of any one of claims 52-56, wherein the information field is a dedicated information field of a propagation mode of the MBS or an information field existing in the DCI.
The apparatus of claim 51, wherein the configuration information of the DCI includes a radio network temporary identity, RNTI, corresponding to a cyclic redundancy check, CRC, of a physical downlink control channel, PDCCH, different RNTIs being used to indicate that the DCI is used to schedule the broadcast PDSCH or the multicast PDSCH, respectively.
The apparatus of claim 58, wherein the propagation manner of the MBS indicated by the RNTI is divided according to a type of the RNTI.
The apparatus of claim 51, wherein the configuration information of the DCI further comprises a set of control resources used to schedule PDCCH, different sets of control resources being used to associate the broadcasted PDSCH or the multicasted PDSCH scheduled by the DCI, respectively.
The apparatus of claim 51, wherein the configuration information of the DCI further comprises a search space corresponding to a scheduling PDCCH, different search spaces being used to associate the broadcasted PDSCH or the multicasted PDSCH scheduled by the DCI, respectively.
The apparatus of claim 61, wherein propagation of the MBS to which the search space is associated is partitioned according to a type of the search space.
The apparatus of claim 62, wherein the type of search space comprises a public search space, a private search space, or a business-private search space.
The apparatus of claim 61, wherein propagation modes of the MBS associated with the search space are partitioned according to preset frequency domain locations.
A terminal device, comprising: a processor, a memory, a transmitter, and a receiver;

The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory and executing the method as claimed in any one of claims 1-17;

The transmitter is configured to perform a transmitting action of the terminal device, and the receiver is configured to perform a receiving action of the terminal device.
A network device, comprising: a processor, a memory, a transmitter, and a receiver;

the memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory and executing the method of any one of claims 18-32;

the transmitter is configured to perform a transmitting action of the network device, and the receiver is configured to perform a receiving action of the network device.
A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any of claims 1-17 or 18-32.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1-17 or 18-32.
A computer program product comprising computer program information for causing a computer to perform the method of any one of claims 1-17 or 18-32.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1-17 or 18-32.