RU2781852C1 - Method for indicating the protocol data unit session status, user equipment, and data storage medium - Google Patents

Abstract

FIELD: communication.

SUBSTANCE: to realise the technical result, the provided method for indicating the protocol data unit session status includes indicating the activation and/or deactivation of the protocol data unit session by the UE based on the configuration signalling information sent by the network equipment. Such an indication herein includes an indication of the deactivation of at least one PDU session by the radio resource control (RRC) level to the upper levels of the UE when the UE releases a data radio bearer (DRB) corresponding to the identifier (ID) of the first DRB, or DRBs corresponding to the ID of the first DRB group, based on the configuration signalling information, so that at least one PDU session does not have a DRB associated therewith; wherein the configuration signalling information indicates the ID of the first DRB or the ID of the first DRB group for releasing.

EFFECT: possibility of determining whether the protocol data unit (PDU) session is in an activated or deactivated state at the non-access stratum (NAS) level in the user equipment (UE).

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Description

FIELD OF TECHNOLOGY TO WHICH THE INVENTION RELATES

[0001] The present invention relates to the field of wireless communication technology and, in particular, to a method for indicating the session status of a protocol data unit, a terminal device, and a storage medium.

BACKGROUND OF THE INVENTION

[0002] At the non-access layer (NAS) layer of a terminal device (e.g., user equipment, UE), the UE needs to know the status (such as an activated state or a deactivated state) of a protocol data unit (PDU) session to determine whether to activate the session PDU. Therefore, an urgent problem to be solved is how to determine whether a session PDU is in an activated or deactivated state at the NAS UE level.

SUMMARY OF THE INVENTION

[0003] In order to solve the above technical problem, embodiments of the present invention provide a method for indicating the status of a PDU session, a terminal device, and a storage medium so that it can be determined whether the PDU session is in an activated or deactivated state at the NAS UE level.

[0004] In a first aspect, an embodiment of the present invention provides a method for indicating the status of a PDU session, which includes: indicating by a terminal device to activate and/or deactivate a PDU session based on configuration signaling information sent by a network device.

[0005] In a second aspect, in an embodiment of the present invention, a terminal device is provided, comprising: a processing unit configured to indicate activation and/or deactivation of a protocol data unit (session PDU) session based on configuration signaling information sent by a network device.

[0006] In a third aspect, an embodiment of the present invention provides a terminal device comprising: a processor and a storage device for storing a computer program that can be run on the processor, wherein the processor is configured to implement the steps of a method executed by the terminal device when the computer program is started.

[0007] In a fourth aspect, in an embodiment of the present invention, a storage medium is provided on which an executable program is stored that, when executed by a processor, implements a method executed by a terminal device.

[0008] Through the PDU session status indication method provided in the embodiments of the present invention, the UE may, based on the configuration signaling information sent by the network device, indicate that the PDU session status is activated and/or deactivated so that the PDU session status can be determined on NAS UE level.

BRIEF DESCRIPTION OF GRAPHICS

[0009] FIG. 1 is a schematic representation of a prior art 5G system QoS model;

[0010] in FIG. 2 is a schematic structural view of a communication system according to an embodiment of the present invention;

[0011] in FIG. 3 is a schematic diagram of an alternative workflow of a method for indicating PDU session status according to an embodiment of the present invention;

[0012] in FIG. 4 is a schematic structural view of a terminal device provided in an embodiment of the present invention; and

[0013] in FIG. 5 is a schematic structural view of the hardware components of a terminal device provided in an embodiment of the present invention.

DETAILED DESCRIPTION

[0014] In order to understand the features and technical content of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of the present invention.

[0015] Before describing the embodiments of the present invention in detail, first, a quality of service (QoS) model of a 5G system is briefly described.

[0016] As shown in FIG. 1, one or more PDU sessions are established for each UE; at least one data radio bearer (DRB) is established for each PDU session. For each UE, the NG-RAN establishes at least one DRB for each PDU; the session PDU associated with the DRB is established when the DRB is set up. In addition, the NG-RAN may also establish other DRBs, and there is a correlation between these DRBs and the QoS flows of the session PDU; NG-RAN establishes a correlation between different DRBs and data packets that belong to different PDU sessions.

[0017] In each PDU session, in the absence of a DRB configuration for the PDU session via RRC signaling, and in the absence of a mapping rule configuration between the PDU session and the DRB, the PDU session may be performed with the default DRB, in which case the UE maps the data packets to the DRB by default corresponding to the session PDU.

[0018] For each PDU session, the mapping order of multiple QoS flows to DRB is performed by NG-RAN. NG-RAN may map one GBR stream and one non-GBR stream or multiple GBR streams to the same DRB.

[0019] The present invention provides a method for indicating the session status of a PDU. The method for indicating the PDU session status in the embodiments of the present application can be applied to various communication systems, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Packet General Use Radio Communication System (GPRS), Long Term Evolution System (LTE), LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunications System (UMTS), Global Interoperability Communication System for microwave access (WiMAX) or 5G system.

[0020] As an example, the communication system 100 used in the embodiments of the present application is shown in FIG. 2. Communication system 100 may include a network device 110, which may be a device that communicates with terminal devices 120 (also called communication terminals, terminals). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Alternatively, network device 110 may be a base transceiver station (BTS) in a GSM or CDMA system, or may be a NodeB (NB) in a WCDMA system, or may be an evolutionary NodeB (eNB or eNodeB) in an LTE system, or may be a radio controller in a cloud radio access network (CRAN); or the network device may be a mobile switching center, relay station, access point, vehicle-mounted device, wearable device, hub, switch, network bridge, router, network-side device in a 5G network, or a network device in an advanced evolutionary terrestrial Public Mobile Communications Network (PLMN) or the like.

[0021] Communication system 100 further comprises at least one terminal device 120 located within the coverage area of network device 110. As used herein, "terminal device" includes, but is not limited to, a transmitter connected via a wired line (such as a public telephone network). (PSTN), digital subscriber line (DSL), digital cable, direct cable), and/or via another data connection/network, and/or via a wireless interface (e.g. for cellular network, wireless local area network (WLAN), digital television network (such as DVB-H network), satellite network, AM-FM broadcasting); and/or an apparatus of another terminal device configured to receive/transmit communication signals; and/or an Internet of Things (IoT) device. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communications terminal", "wireless terminal", or "mobile terminal". An example of a mobile terminal includes, but is not limited to, a satellite phone or a cellular phone; a personal communications system (PCS) terminal that can integrate a cellular radiotelephone with data processing functionality, facsimile functionality, and data communications functionality; a PDA, which may include a radiotelephone, pager, Internet/Intranet access, web browser, notepad, calendar, and/or a global positioning system (GPS) receiver; and a conventional laptop computer and/or pocket receiver, or other electronics containing radiotelephone transceivers. A terminal device may be an access terminal, user equipment (UE), user unit, user station, mobile station, mobile console, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The access terminal may be a cellular phone, a radiotelephone, a session establishment protocol (SIP) phone, a wireless subscriber access station (WLL), a personal digital assistant (PDA), a wireless capable handheld device, a computing device, other processing devices connected to a wireless a modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolutionary PLMN, or the like.

[0022] Alternatively, device-to-device (D2D) communication may be between terminal devices 120.

[0023] Alternatively, a 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0024] FIG. 2, one network device and two terminal devices are shown as an example, and as an alternative, the communication system 100 may include a plurality of network devices, the coverage area of each network device may include other numbers of terminal devices, which are not limited in embodiments of the present application.

[0025] Alternatively, the communication system 100 may further comprise other network entities such as a network controller and a mobility management node, which are not limited in the embodiments of the present application.

[0026] It should be noted that in embodiments of the present application, a device with a network/system communication function may be referred to as a communication device. Taking the communication system 100 shown in FIG. 2, by way of example, a communication device may include a network device 110 and terminal devices 120 with communication functions, and the network device 110 and terminal devices 120 may be specific devices described above that will not be re-described herein. The communication device may also include other devices (eg, other network entities such as a network controller and a mobility management node) in the communication system 100, which is not limited in the embodiments of the present application.

[0027] An alternative process flow of the method for indicating PDU session status provided in the embodiments of the present invention is shown in FIG. 3, which includes the following step:

[0028] S201 indicating by the terminal device to activate and/or deactivate the PDU session based on the configuration signaling information sent by the network device.

[0029] In an embodiment of the present invention, the UE receives the configuration signaling information sent by the network device, and the configuration signaling information is used to instruct the terminal device to perform activation processing and/or deactivation processing on the session PDU. There is a correlation between a PDU session and a DRB, and one PDU session may be associated with one DRB, or one PDU session may be associated with multiple DRBs.

[0030] In some embodiments, when the configuration signaling information indicates deactivation of the first PDU session or the first PDU session group, the UE releases the DRB associated with the first PDU session or the DRBs associated with the first PDU session group based on the signaling information about configuration. After the UE deactivates the first PDU session or the first PDU session group, the Radio Resource Control (RRC) layer of the UE indicates to upper layers that the first PDU session or the first PDU session group is deactivated.

[0031] For example, when the configuration signaling information indicates deactivation of the first group of PDU sessions, the UE releases all DRBs associated with the first group of PDU sessions.

[0032] In some other embodiments, when the configuration signaling information indicates the identifier (ID) of the first DRB or the ID of the first DRB group to be released, the UE releases the DRB corresponding to the first DRB ID or the DRB corresponding to the first DRB group ID , based on the configuration signaling information. When a UE DRB release results in at least one PDU session having no DRB associated with it, the UE RRC layer indicates to upper layers that at least one PDU session has been deactivated.

[0033] For example, the fourth PDU session is associated with three DRBs, where the IDs of the first DRB group include the IDs of the three DRBs, and

[0034] three DRBs corresponding to the IDs of the three DRBs are associated with the fourth PDU session; when the configuration signaling information indicates a first DRB group ID to be released, three DRBs corresponding to the three DRB IDs constituting the first DRB group ID are released, and no DRB is associated with the fourth PDU session; in this case, the RRC layer of the UE indicates to upper layers that the fourth session PDU is deactivated.

[0035] In other embodiments, when the configuration signaling information indicates the first DRB ID or the first DRB group ID to be released, and the configuration signaling information further indicates deactivation of the second session PDU associated with the second DRB corresponding to the second DRB ID, the RRC layer of the terminal device indicates to upper layers that the second session PDU is deactivated.

[0036] For example, the configuration signaling information indicates the ID of the first DRB to be released, the ID of the first DRB associated with the second session PDU, and the DRBs associated with the second session PDU are the first DRB, the second DRB, and the third DRB, respectively; the first DRB corresponds to the ID of the first DRB, the second DRB corresponds to the ID of the second DRB, and the third DRB corresponds to the ID of the third DRB.

[0037] When the configuration signaling information indicates only the ID of the first DRB to be released, since there is still a correlation between the second session PDU associated with the first DRB corresponding to the ID of the first DRB, the second DRB and the third DRB, if the signaling information about configuration indicates neither the deactivation of the second PDU session associated with the second DRB corresponding to the second DRB ID nor the deactivation of the second session PDU associated with the third DRB corresponding to the third DRB ID, then the UE does not perform deactivation processing on the second PDU session. If the configuration signaling information indicates deactivation of the second PDU session associated with the second DRB corresponding to the second DRB ID, or indicates deactivation of the second PDU session associated with the third DRB corresponding to the third DRB ID, then the UE performs deactivation processing on the second PDU session; and in such a case, the RRC layer of the UE indicates to upper layers to deactivate the second session PDU.

[0038] In this case, the ID of the second DRB may be the same as the ID of the first DRB, or the ID of the second DRB may be different from the ID of the first DRB; and the first DRB ID may belong to the first DRB group ID, or the first DRB ID may not belong to the first DRB group ID.

[0039] In other embodiments, when the configuration signaling information indicates a second DRB ID or a second DRB group ID to be added by the UE, the UE adds a DRB corresponding to the second DRB ID or DRB corresponding to the second DRB group ID; and, when the DRB added(s) by the UE is (are) the first DRB(s) of the third session PDU, the RRC layer of the UE indicates to upper layers that the third session PDU is activated.

[0040] Alternatively, the configuration signaling information in embodiments of the present invention is an RRC configuration change message, and the RRC configuration change message contains a radio bearer configuration.

[0041] In an embodiment of the present invention, the UE may indicate, based on the configuration signaling information sent by the network device, that the session PDU is activated and/or deactivated; The UE at the AS layer indicates the session status of the PDU to the NAS layer so that the NAS layer of the UE can determine the session status of the PDU.

[0042] Embodiments of the present invention further provide a terminal device, and a schematic representation of the structural composition of the terminal device 300 is shown in FIG. 4 which contains:

[0043] a processing unit 301, configured to indicate the activation and/or deactivation of the PDU session based on the configuration signaling information sent by the network device.

[0044] In an embodiment of the present invention, the processing unit 301 is configured to indicate the deactivation of the first PDU session or the first group of PDU sessions to upper layers when the configuration signaling information indicates the deactivation of the first PDU session or the first group of PDU sessions.

[0045] In an embodiment of the present invention, the processing unit 301 is further configured to release the DRB associated with the first PDU session or release the DRBs associated with the first group of PDU sessions.

[0046] In an embodiment of the present invention, when the configuration signaling information indicates the first DRB ID or the first DRB group ID to be released, and the processing unit 301 releases the DRB corresponding to the first DRB ID or the DRB corresponding to the first DRB group ID, based on the configuration signaling information such that at least one PDU session has no DRB associated with it,

[0047] the processing unit 301 is configured to indicate the deactivation of at least one PDU session to upper layers.

[0048] In an embodiment of the present invention, when the configuration signaling information further indicates the deactivation of the second session PDU associated with the second DRB corresponding to the second DRB ID, the processing unit 301 is configured to indicate the deactivation of the second session PDU to upper layers, wherein

[0049] The ID of the second DRB is the same as or different from the ID of the first DRB, and the ID of the first DRB belongs to the ID of the first DRB group, or the ID of the first DRB does not belong to the ID of the first DRB group.

[0050] In an embodiment of the present invention, when the configuration signaling information indicates the second DRB ID or the second DRB group ID to be added by the UE, and the processing unit 301 adds the DRB corresponding to the second DRB ID or DRB corresponding to the second DRB group ID , as the first DRB(s) of the third session PDU, the processing unit 301 is configured to indicate the activation of the third session PDU to upper layers.

[0051] It should be noted that the UE involved in the embodiments of the present invention is located at the AS level.

[0052] In embodiments of the present invention, a terminal device is further provided that includes a processor and a storage device for storing a computer program that can run on the processor, wherein the processor is configured to implement the steps of a method for indicating the status of a PDU session executed by the terminal device upon computer startup. programs.

[0053] FIG. 5 is a schematic structural view of the hardware components of a terminal device according to an embodiment of the present invention, and the terminal device 700 includes: at least one processor 701, a storage device 702, and at least one network interface 704. Various components in the terminal device 700 are connected to each other. through a bus system 705. It can be noted that the bus system 705 is used to implement connections and communication between these components. The bus system 705 further comprises, in addition to a data bus, a power bus, a control bus, and a status signal bus. However, for clarity of illustration, all of the various buses are designated as bus system 705 in FIG. 5.

[0054] It can be noted that the storage device 702 may be a volatile storage device or a non-volatile storage device, or may contain both volatile and non-volatile storage devices. The non-volatile memory may be ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface, compact disc or compact disc read only memory (CD-ROM); and the magnetic surface storage device may be a disk storage device or a tape storage device. The volatile memory may be random access memory (RAM) that functions as an external cache. As an illustrative, but non-limiting example, many types of RAM may be available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM) ), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), channel synchronous dynamic random access memory (SLDRAM), and direct resident access bus random access memory (DRRAM). The storage device 702 described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of storage device.

[0055] The storage device 702 in the embodiments of the present invention is configured to store various types of data to support the operations of the terminal device 700. Examples of this data include any computer program (such as an application 7022) to run on the terminal device 700. A program for implementing the method according to embodiments of the present invention may be contained in Appendix 7022.

[0056] The method disclosed in the above embodiments of the present invention may be applied to the processor 701 or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing functionality. During implementation, various steps of the method described above may be performed by a hardware integrated logic circuit or instructions in the form of software in processor 701. Processor 701 may be a general purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete logic elements or transistorized logic devices, discrete hardware components, or the like. The processor 701 may implement or execute the methods, steps, and flowcharts disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as implemented by a hardware decoding processor or by a combination of hardware and software modules in a decoding processor. The software module may be located in a storage medium, wherein the storage medium is located in a storage device 702, and the processor 701 reads information from the storage device 702 and performs the steps of the above method along with its hardware components.

[0057] In an exemplary embodiment, terminal device 700 may be implemented by one or more of the following: application specific integrated circuit (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), FPGA, general purpose processor , controller, MCU, MPU or other electronic components, to perform the above method.

[0058] In embodiments of the present application, a computer-readable storage medium is further provided for storing a computer program.

[0059] Alternatively, a computer-readable storage medium can be applied to a terminal device in the embodiments of the present application, the computer program causes the computer to implement the corresponding sequences of operations that are implemented by the terminal device, in various ways of the embodiments of the present application, which will not be described again in this document for brevity.

[0060] The present invention has been described with reference to flowcharts and/or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be noted that each sequence and/or block in the flowcharts and/or block diagrams and any combination of sequences and/or blocks in the flowcharts and/or block diagrams may be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to create a machine, so that the instructions executable by the processor of the computer or other programmable data processing devices create the means to implement the functions specified in one or more sequences of operations in flowcharts and/or one or more blocks in flowcharts.

[0061] These computer program instructions may also be stored in a computer-readable storage device that can control a computer or other programmable data processing device to operate in a certain way so that the instructions stored in the computer-readable storage device create a finished product containing instructions that can implement functions indicated in one or more sequences of operations in the flow diagrams and/or one or more blocks in the flowcharts.

[0062] These computer program instructions may also be downloaded to a computer or other programmable data processing devices, such that the sequence of operating steps is implemented by the computer or other programmable devices to perform the computer-implemented processing, and thus the instructions executed by the computer or other programmable devices, provide steps for implementing the functions indicated in one or more of the sequences of operations in the flow diagrams and/or one or more blocks in the block diagrams.

[0063 The above descriptions are only preferred embodiments of the present invention, but are not intended to limit the scope of the present invention, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in scope of legal protection of the present invention.

Claims (25)

1. A method for indicating the session status of a protocol data unit, including: indicating (S201) by the terminal device the activation and/or deactivation of the protocol data unit session, the session PDU, based on the configuration signaling information sent by the network device, characterized in that the indication (S201) by the terminal device of activation and/or deactivation of the PDU session based on the configuration signaling information sent by the network device includes: indication by the radio resource control, RRC, upper layers of the terminal device to deactivate at least one PDU session when the terminal device releases the data radio bearer, DRB corresponding to the identifier, ID, of the first DRB, or DRBs corresponding to the ID of the first DRB group, based on the signaling information about the configuration such that at least one PDU session has no DRB associated with it, wherein the configuration signaling information indicates a first DRB ID or a first DRB group ID to be released. 2. The method of claim 1, wherein the terminal device indicating (S201) the activation and/or deactivation of the PDU session based on the configuration signaling information sent by the network device comprises: indicating by the RRC layer to the upper layers of the terminal device to deactivate the first session PDU or the first group of PDU sessions when the configuration signaling information indicates the deactivation of the first session PDU or the first group of PDU sessions. 3. The method of claim 2, wherein before the RRC layer indicates to the upper layers of the terminal device to deactivate the first session PDU or the first group of PDU sessions, the method further comprises: releasing by the terminal device the DRB associated with the first session PDU or the DRB associated with the first group of session PDUs. 4. The method of claim 1, wherein the terminal device's indication of PDU session activation and/or deactivation based on configuration signaling information sent by the network device includes: the RRC layer indicating to the upper layers of the terminal device the deactivation of the second session PDU, when the configuration signaling information further indicates the deactivation of the second session PDU associated with the second DRB corresponding to the ID of the second DRB, wherein The ID of the second DRB is the same as or different from the ID of the first DRB, and the ID of the first DRB belongs to the ID of the first DRB group, or the ID of the first DRB does not belong to the ID of the first DRB group. 5. The method of claim 1, wherein the terminal device indicating (S201) the activation and/or deactivation of the PDU session based on the configuration signaling information sent by the network device includes: indication by the RRC layer to the upper layers of the terminal device of activating the third session PDU when the configuration signaling information indicates the ID of the second DRB or the ID of the second DRB group to be added by the terminal device, and the terminal device adds the DRB corresponding to the second DRB ID or the DRB corresponding to the ID the second DRB group as the first DRB(s) of the third session PDU. 6. The method according to any one of paragraphs. 1-5, characterized in that the configuration signaling information is an RRC configuration change message. 7. Terminal device (300) for wireless communication, containing: a processing unit (301) configured to indicate the activation and/or deactivation of a protocol data unit session, a session PDU, based on configuration signaling information sent by a network device, characterized in that the processing unit (301) is configured to indicate deactivation of at least one PDU session to upper layers when the processing unit releases a data radio bearer, a DRB corresponding to an identifier, ID, of the first DRB, or DRBs corresponding to the ID of the first DRB group, based on the configuration signaling information such that at least one PDU session has no associated DRB, wherein the configuration signaling information indicates a first DRB ID or a first DRB group ID to release. 8. The wireless communication terminal device according to claim 7, characterized in that the processing unit (301) is configured to indicate the deactivation of the first PDU session or the first group of PDU sessions to the upper layers when the configuration signaling information indicates the deactivation of the first PDU session or the first group PDU sessions. 9. The wireless communication terminal device of claim 8, wherein the processing unit (301) is further configured to release the DRB associated with the first PDU session or release the DRBs associated with the first group of PDU sessions. 10. The wireless communication terminal device according to claim 7, characterized in that when the configuration signaling information further indicates deactivation of the second session PDU associated with the second DRB corresponding to the ID of the second DRB, the processing unit (301) is configured to indicate the deactivation of the second session PDU to upper layers, and The ID of the second DRB is the same as or different from the ID of the first DRB, and the ID of the first DRB belongs to the ID of the first DRB group, or the ID of the first DRB does not belong to the ID of the first DRB group. 11. The wireless communication terminal device according to claim 7, wherein when the configuration signaling information indicates a second DRB ID or a second DRB group ID to be added by the wireless communication terminal device, and the processing unit (301) adds the DRB , corresponding to the ID of the second DRB, or DRBs corresponding to the ID of the second DRB group, as the first (first) DRBs of the third PDU session, the processing unit is configured to indicate activation of the third PDU session to upper layers. 12. Terminal device for wireless communication according to any one of paragraphs. 7-11, characterized in that the configuration signaling information is a radio resource control (RRC) configuration change message. 13. The wireless communication terminal device according to claim 12, characterized in that the RRC configuration change message contains a radio channel configuration.

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