WO2022227010A1 - Procédé de gestion de session d'unité de données de protocole (pdu) et dispositif - Google Patents

Procédé de gestion de session d'unité de données de protocole (pdu) et dispositif Download PDF

Info

Publication number
WO2022227010A1
WO2022227010A1 PCT/CN2021/091512 CN2021091512W WO2022227010A1 WO 2022227010 A1 WO2022227010 A1 WO 2022227010A1 CN 2021091512 W CN2021091512 W CN 2021091512W WO 2022227010 A1 WO2022227010 A1 WO 2022227010A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
data transmission
transmission device
connection
data
Prior art date
Application number
PCT/CN2021/091512
Other languages
English (en)
Chinese (zh)
Inventor
赵鹏涛
李岩
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2021/091512 priority Critical patent/WO2022227010A1/fr
Publication of WO2022227010A1 publication Critical patent/WO2022227010A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment

Definitions

  • the present application relates to the field of communications, and, more particularly, to methods and apparatus for managing protocol data unit sessions.
  • the protocol data unit (PDU) session in service and session continuity mode 2 (SSC mode 2) in 3GPP TS 23.502 cannot guarantee service continuity for terminal equipment.
  • the network determines that the user plane function (UPF) of the anchor point needs to be changed (for example, the routing path of the anchor point UPF is too long relative to the current location of the terminal device), the network will trigger the release of the current PDU session and indicate The terminal device establishes a new PDU session, and selects a new anchor point UPF in the process of establishing the new PDU session, so that the routing path of the new session is more optimized. This way of establishing a PDU session is also called "break-before-build".
  • TCP Transmission Control Protocol
  • the present application provides a method and device for managing a protocol data unit session, which can synchronize the transmission and reception status of a transmission control protocol connection between a terminal device and an application server, reduce the waste of air interface resources, and avoid the increase in transmission delay of the resumed transmission service. big.
  • a first aspect provides a method for managing a protocol data unit session, comprising: a session management function network element sending first information to a first data transmission device, the first information indicating that the protocol data unit session will be released; The element determines that the transmission control protocol connection between the first data transmission device and the second data transmission device has been released according to the first information, the transmission control protocol connection bears the resume transmission service, and the protocol data unit session includes the transmission control protocol connection; session management The functional network element releases the protocol data unit session.
  • the first data transmission device may be a terminal device, and the second data transmission device may be an application server, or, the first data transmission device may be an application server, and the second data transmission device may be a terminal device.
  • the first data transmission device and the second data transmission can be synchronized by notifying the first data transmission device to disconnect the transmission control protocol connection carrying the resumed transmission service before the protocol data unit session is disconnected.
  • the transmission control protocol connection transceiver status of the device Since the transmission and reception status of the transmission control protocol connection of the first data transmission device and the second data transmission device are synchronized, retransmission of successfully transmitted data is avoided, and because the transmission control protocol connection release process is actively executed, it is avoided that the transmission control protocol connection is not delivered on the connection. data retransmission.
  • the waste of air interface resources can be reduced, and the transmission delay of the breakpoint part can be avoided from increasing.
  • the first information may be sent to the first data transmission device through the user plane, the session management function network element sends the first information through the user plane function network element, and the first information It is included in the packet header of the data packet of the user plane functional network element.
  • one manner may be that the session management function network element sends the first information to the user plane function network element, and the user plane management function network element directly includes the first information in the header of the data packet.
  • Another way may be that the session management function network element sends the first signaling to the user plane function network element, the user plane function network element generates the first information through the first signaling, and includes the first information in the packet header of the data packet middle.
  • the session management function network element when the session management function network element sends the first information to the first data transmission device through the control plane or the user, the session management function network element determines the first data transmission device The transmission control protocol connection with the second data transmission device has been released according to the first information, including:
  • the session function management network element starts a timer after sending the first information, and when the first time elapses after the first information is sent, it is determined that the transmission control protocol connection has been released according to the first information.
  • the session management function network element when the session management function network element sends the first information by controlling the terminal device or the application server, the session management function network element determines the relationship between the terminal device and the application server.
  • the TP connection has been released according to the first information, including:
  • the session function management network element receives the first feedback information from the terminal device or the application server, where the first feedback information indicates that the transmission control protocol connection has been released according to the first information.
  • a method for managing a protocol data unit session comprising: a first data transmission device receiving first information sent from a network element with a session management function, the first information indicating that the first protocol data unit session will be released; The first data transmission device determines that the transmission control protocol connection between the first data transmission device and the second data transmission device bears the resume-break service, and the protocol data unit session includes the transmission control protocol connection; the first data transmission device according to the first information , to release the Transmission Control Protocol connection.
  • the first data transmission device may be a terminal device, and the second data transmission device may be an application server, or, the first data transmission device may be an application server, and the second data transmission device may be a terminal device.
  • the first data transmission device and the second data transmission can be synchronized by notifying the first data transmission device to disconnect the transmission control protocol connection carrying the resumed transmission service before the protocol data unit session is disconnected. Transmit and receive status of the TP connection between the devices. Since the transmission and reception status of the transmission control protocol connection between the first data transmission device and the second data transmission device is synchronized, retransmission of successfully transmitted data is avoided, and because the transmission control protocol connection release process is actively executed, it is avoided that the transmission control protocol connection is not sent on the connection. Retransmission of data. The waste of air interface resources can be reduced, and the transmission delay of the breakpoint part can be avoided from increasing.
  • the first data transmission device when the first information is sent through the control plane, the first data transmission device sends the first feedback information to the session management network element after releasing the transmission control protocol connection, and the first data transmission device sends the first feedback information to the session management network element.
  • a feedback message indicates that the Transmission Control Protocol connection has been released.
  • the transmission control protocol connection is a transmission control protocol connection between the first data transmission device and the second data transmission device that bears the resumed transmission service.
  • the first data transmission device when the first information is sent through the user plane, decapsulates the data packet to receive the first information, and further, releases the transmission control according to the first information protocol connection.
  • the release of the TP connection can be initiated by the terminal device alone or by the application server alone.
  • a communication apparatus which includes a unit for performing each step of the communication method in any one of the first and second aspects and implementations thereof.
  • the communication device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the communication device is a communication device (eg, terminal device or network device, etc.), and the communication chip may include a transmitter for sending information or data, and a receiver for receiving information or data.
  • the communication chip may include a transmitter for sending information or data, and a receiver for receiving information or data.
  • a communication device including a processor and a memory, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device executes the above-mentioned first aspect and A communication method in any of the second aspects and implementations thereof.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the communication device further includes a transmitter (transmitter) and a receiver (receiver).
  • a computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, causes a computer to execute the first aspect and the first aspect above. Any one of the two aspects and a communication method in each of its implementations.
  • a computer-readable medium stores a computer program (also referred to as code, or instruction), when it runs on a computer, causing the computer to execute the above-mentioned first aspect and the first aspect. Any one of the two aspects and a communication method in each of its implementations.
  • a chip system including a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device installed with the chip system executes the above-mentioned A communication method in any of the first and second aspects and implementations thereof.
  • the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 3 is a schematic diagram of another application scenario of the embodiment of the present application.
  • FIG. 4 is a schematic diagram of a process of changing the anchor point UPF under SSC mode 2 according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a flow of establishing a TCP connection according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a process of releasing a TCP connection according to an embodiment of the present application.
  • FIG. 7 is a schematic interaction diagram of an example of a method for managing a PDU session according to an embodiment of the present application.
  • FIG. 8 is a schematic interaction diagram of another example of a method for managing a PDU session according to an embodiment of the present application.
  • FIG. 9 is a schematic interaction diagram of another example of a method for managing a PDU session according to an embodiment of the present application.
  • FIG. 10 is a schematic interaction diagram of another example of a method for managing a PDU session according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of another communication device according to an embodiment of the present application.
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between 2 or more computers.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G 5th Generation
  • 5G 5th Generation
  • New Radio New Radio
  • the terminal device in this embodiment of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or user device.
  • the terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or future evolved Public Land Mobile Networks (PLMN)
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • a terminal device, etc. is not limited in this embodiment of the present application.
  • Fig. 1 is a network architecture applied to an embodiment of the present application, which is a schematic diagram of a 5G network architecture based on a point-to-point interface, which can be divided into three parts, namely user equipment (user equipment, UE), data network (data network, DN) and operation Each network element that may be involved in the network architecture will be described separately.
  • Terminal equipment refers to network terminal equipment, such as mobile phones, Internet of Things terminal equipment, etc.
  • RAN Radio Access Network, Radio Access Network
  • a device that provides wireless access for terminal devices including but not limited to gNodeB, eNodeB, WiFi AP, WiMAX BS, etc.
  • AMF Access and Mobility management Function: It is mainly responsible for mobility management in the mobile network, such as user location update, user registration network, user switching, etc.
  • SMF Session Management Function
  • Session Management Function It is mainly responsible for session management (such as session establishment, modification, and release) in the mobile network, IP address allocation and management, and UPF selection and control.
  • PCF Policy Control Function, policy control function: responsible for the generation of terminal equipment access policies and quality of service (quality of service, QoS) flow control policies.
  • UDM Unified Data Management
  • AUSF Authentication Server Function
  • NEF Network Exposure Function
  • UDR Unified Data Repository
  • NRF Network Repository Function
  • AF Application Function
  • UPF User Plane Function, user plane function
  • DN Data Network, data network: refers to a specific data service network that terminal equipment accesses.
  • the DN is identified by the Data Network Name (DNN) in the 5G network.
  • Typical DNs include Internet, IMS (IP Multi-media Service, IP Multimedia Service) networks, etc.
  • the operator network may include one or more of the following network elements: Authentication Server Function (AUSF) network element, Network Exposure Function (Network Exposure Function, NEF) network element, Policy Control Function (Policy Control Function, PCF) network element, Unified Data Management (UDM) network element, Unified Data Repository (UDR), Network Repository Function (NRF) network element, Application Function (AF) network element element, access and mobility management function (Access and Mobility Management Function, AMF) network element, session management function (Session Management Function, SMF) network element, radio access network (Radio Access Network, RAN) and user plane functions ( User Plane Function, UPF) network element, etc.
  • AUSF Authentication Server Function
  • NEF Network Exposure Function
  • Policy Control Function Policy Control Function
  • PCF Policy Control Function
  • UDM Unified Data Management
  • UDR Unified Data Repository
  • NRF Network Repository Function
  • AF Application Function
  • SMF Session Management Function
  • SMF Session Management Function
  • RAN Radio Access Network
  • network element may also be referred to as an entity, a device, an apparatus, or a module, etc., which is not particularly limited in this application.
  • the description of "network element” is omitted in some descriptions.
  • the NEF network element is abbreviated as NEF.
  • the “NEF” should be understood as the NEF network element or NEF entity, hereinafter, the description of the same or similar situations is omitted.
  • each network element included in FIG. 1 is only a name, and the name does not limit the function of the network element itself.
  • the above-mentioned network elements may also have other names, which are not specifically limited in this embodiment of the present application.
  • some or all of the above-mentioned network elements may use the terminology in 5G, or other names, etc., which will be uniformly described here, and will not be repeated below.
  • each network element in FIG. 1 does not necessarily exist at the same time, and which network elements are required can be determined according to requirements.
  • the connection relationship between each network element in FIG. 1 is not uniquely determined, and can be adjusted according to requirements.
  • network elements or functions may be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (eg, a cloud platform).
  • FIG. 2 shows a schematic diagram of an application scenario of an embodiment of the present application. As shown in Figure 2, it is a typical service and session continuity mode 2 (service and session continuity mode 2, SSC mode 2) business scenario.
  • service and session continuity mode 2 service and session continuity mode 2, SSC mode 2
  • FIG. 3 shows a schematic diagram of still another application scenario of the embodiment of the present application.
  • the SSC mode 2 service scenario shown in Figure 3 involves AS migration in the same DN.
  • RAN Used to implement wireless-related functions.
  • AMF responsible for user mobility management, including mobility status management, assigning user temporary identities, authenticating and authorizing users.
  • SMF It is mainly responsible for session management (such as session establishment, modification, and release) in the mobile network, IP address allocation and management, and UPF selection and control.
  • PCF responsible for the generation of terminal device access policies and quality of service (QoS) flow control policies.
  • QoS quality of service
  • UDM Responsible for managing subscription data, and informing the corresponding network element when the subscription data is modified.
  • AF Responsible for providing services to the 3GPP network, such as affecting service routing, interacting with PCF for policy control, etc.
  • UPF Provides user plane functions such as user packet forwarding, processing, connection to DN, session anchor, and QoS policy enforcement.
  • DN refers to a specific data service network that terminal equipment accesses.
  • the DN is identified by the data network name (DNN) in the 5G network.
  • Typical DNs include Internet, IMS (IP Multi-media Service, IP Multimedia Service) networks, etc.
  • the SMF decides to perform UPF reselection, that is, when the network determines that the UPF of the anchor point needs to be changed (for example, the routing path of the anchor point UPF is too long relative to the current position of the terminal device).
  • the network triggers the release of the current PDU session, and the path of the current PUD session is UPF1.
  • the terminal device establishes a new PDU session, and selects a new anchor point UPF2 in the process of establishing the new PDU session, so that the routing path of the new session is more optimized.
  • SSC mode 2 can carry services such as resumable uploading from breakpoints.
  • Resuming uploading from breakpoints is to artificially divide the task (a file or compressed package) into several parts during uploading/downloading, and each part uses a thread for uploading/downloading , if you encounter a network failure, you can continue uploading/downloading the unfinished part from the part that has already been uploaded/downloaded, instead of having to start uploading/downloading from the beginning. Save time and increase speed.
  • Common upload/download software that supports resumed uploads: QQ whirlwind, Xunlei, Kuaiche, eMule, Ku6, Tudou, Youku, Baidu Video, Sina Video, Tencent Video, Baidu Cloud, etc.
  • TCP provides a connection-oriented reliable byte stream service.
  • Connection-oriented means that two applications using TCP must establish a TCP connection before exchanging data with each other.
  • TCP uses "ports" to identify application processes at the source and destination. The port number can use any number between 0 and 65535.
  • the operating system dynamically assigns a port number to the client's application.
  • each service provides services to users on a "Well-Know Port".
  • FIG. 5 shows the flow of establishing a TCP connection. As shown in the figure, establishing a TCP connection has the following process:
  • the client When the client needs to send a data packet to the server, the client actively opens the connection. At this time, the server is notified to let the server also open the connection, so the server opens the connection passively. After the connection is opened, the server enters the listening state, waiting for the connection request from the client.
  • the client also begins to prepare connection request packets and starts sending them.
  • the first data packet sent by the client is a connection request segment.
  • SYN 1 (no change)
  • ACK 1
  • the client can be a terminal device
  • the server can be an application server
  • one terminal device can establish multiple TCP connections with multiple application servers, respectively carrying different tasks.
  • FIG. 6 shows the release flow of the TCP connection. As shown in Figure 6, releasing a TCP connection has the following process:
  • the w here is not necessarily v+1
  • the server enters the final confirmation state and waits for the confirmation of the client.
  • the release of the TCP connection can be initiated by the server or by the client.
  • the method 700 includes:
  • SMF1 decides to perform UPF reselection.
  • the SMF1 sends the first information to the first data transmission apparatus.
  • the first information indicates that the PDU session will be released, and indirectly instructs the first data transmission apparatus to release the TCP connection according to the first information.
  • the first information may directly instruct the first data transmission apparatus to release the TCP connection.
  • the TCP connection is between the first data transmission device and the second data transmission device, and bears the resume transmission service
  • the PDU session includes a TCP connection.
  • the TCP connection included in the PDU session is a bearer The transmission of the continuous transmission type service between the first data transmission device and the second data transmission device.
  • the first data transmission device may be a terminal device
  • the second data transmission device may be an application server
  • the first data transmission device may be an application server
  • the first data transmission device may be a terminal device.
  • first data transmission device and the second data transmission device may also be other data transmission devices, which are not limited in this application.
  • the first data transmission apparatus receives the first information, and further releases the TCP connection according to the first information.
  • the first data transmission apparatus receives the first information through the control plane, and further releases the TCP connection according to the first information.
  • the first data transmission apparatus receives the first information through the user plane decapsulation data packet, and further releases the TCP connection according to the first information.
  • SMF1 determines that the TCP connection has been released, and further, SMF1 releases the PDU session.
  • SMF1 indirectly determines that the TCP connection is released, and starts a timer after sending the first information.
  • the first time elapses, the default TCP connection of SMF1 is released, and the first time is the default TCP connection of SMF1 time required to be released.
  • the SMF1 directly determines that the TCP connection is released, the SMF1 receives the first feedback information sent from the first data transmission device or the second data transmission device, and the SMF1 determines that the TCP connection is released.
  • the SMF1 when the SMF1 sends the first information through the control plane, it may determine that the TCP connection has been released by starting a timer, or may determine that the TCP connection has been released by receiving the first feedback information. When the SMF1 sends the first information through the user plane data packet, it may determine that the TCP connection has been released by starting a timer.
  • the SMF1 determines that the TCP connection is released, it executes the release of the PDU session.
  • the method 800 includes:
  • SMF1 decides to perform UPF reselection.
  • the SMF1 sends the first information to the terminal device.
  • the first information indicates that the PDU session is about to be released, and indirectly instructs the terminal device to release the TCP connection, where the TCP connection is a TCP connection between the terminal device and the application server that bears the resumed transmission service, and the TCP connection belongs to the PDU session. .
  • the first information directly instructs the terminal device to release the TCP connection.
  • the content of the first information may be PDU Session Modification Command.
  • the SMF1 may send the first information to the terminal device through the AMF.
  • the SMF1 may send the first information through the Namf_Communication_N1N2MessageTransfer service of the AMF.
  • this PDU session is a PDU session for which SMF1 decides to perform UPF reselection.
  • the terminal device receives the first information, and further releases the TCP connection according to the first information.
  • one PDU session corresponds to one terminal device, and one terminal device has at least one TCP connection, which are respectively connected to different application servers and carry different services, some of which are of the type of continuous transmission.
  • the terminal device when the terminal device receives the first information, it immediately sends second feedback information to SMF1 through the AMF, and then releases the TCP connection according to the first information.
  • the second feedback information indicates that the terminal device has received the first information. a message.
  • the second feedback information may be Ack, and the second feedback information is used to notify the SMF1 terminal device that the first information has been received.
  • the terminal device after receiving the first information, initiates a process of releasing the TCP connection according to the first information, and after the TCP connection is released, it sends first feedback information to SMF1, the first feedback information Indicates that the TCP connection has been released, by way of example and not limitation, the first feedback information may be Ack.
  • S840 SMF1 determines that the TCP connection has been released, and further, SMF1 releases the PDU session.
  • the SMF1 starts a timer after sending the first information in step S820.
  • the timer may be a UPF relocation timer.
  • SMF1 determines that the TCP connection has been released, which is an indirect determination. SMF1 defaults that after the first time has elapsed, the TCP connection has been released, and then initiates the release of the PDU session.
  • the SMF1 starts a timer after receiving the second feedback information in step S830.
  • the timer may be a UPF relocation timer.
  • the SMF1 determines that the TCP connection has been released, which is an indirect determination. SMF1 defaults that after the first time elapses, the TCP connection has been released, and then initiates the release of the PDU session.
  • the SMF1 receives the first feedback information from the terminal device, directly determines that the TCP connection has been released, and then initiates the release of the PDU session.
  • the release of the PDU session specifically includes: as an example but not a limitation, the SMF1 can send the N1 SM Information to the terminal device by calling the Namf_Communication_N1N2MessageTransfer service of the AMF, and the N1 SM Information contains a PDU session release instruction, which includes the PDU session ID and the re-established PDU session. to the same DN.
  • the network and the terminal device complete the process of releasing the original PDU session.
  • the terminal device receives the PDU session release instruction, generates a new PDU session ID, and initiates a PDU session establishment process.
  • AMF selects SMF2, and SMF2 selects UPF2.
  • the network and the terminal device complete the re-establishment of the PDU session of SSC mode 2.
  • SMF1 and SMF2 are only exemplary, representing the session management function network element of the original PDU session and the session management function network element of the re-established PDU session, which may also be represented by SMF3 or the like.
  • UPF2 is only exemplary, and represents a newly created PDU session path, and may also be represented by UPF3 or the like.
  • the SMF notifies the terminal device through the control plane that the network should release the original PDU session, perform UPF reselection, and create a new PDU session to connect to the same DN.
  • the terminal device actively executes the release process of the TCP connection carrying the resumed transmission service on the PDU session, and synchronizes the TCP sending and receiving status between the terminal device and the application server. Due to the synchronization of the sending and receiving status of the TCP connection between the terminal device and the application server, the retransmission of successfully transmitted data is avoided, and the retransmission of undelivered data on the TCP connection is avoided due to the active execution of the TCP connection release process.
  • the method of this embodiment can reduce the waste of air interface resources and avoid increasing the transmission delay of the breakpoint part.
  • the method 900 includes:
  • SMF1 decides to perform UPF reselection.
  • the SMF1 sends the first information to the application server.
  • the first information indicates that the PDU session is about to be released, and indirectly instructs the application server to release the TCP connection. PDU session.
  • the first information directly instructs the application server to release the TCP connection.
  • the SMF1 sends the first information to the application server, and the first information may actually be received by the application function network element in the application server.
  • the application function network element is mainly responsible for the control plane function and interacts with the 5G core network.
  • the application server is mainly responsible for It is responsible for user plane functions and transmits service data with terminal devices.
  • one PDU session corresponds to one terminal device, and one terminal device can be connected to at least one application server through at least one TCP connection, and some of the at least one TCP connection bears the resume transmission service, and some bears other services.
  • the TCP connection is located between the terminal device and the application server, and bears the resumed transmission service from a breakpoint.
  • the SMF1 sends the first information to all associated application servers through the control plane, and the application server determines whether the connection between it and the terminal device is a TCP connection carrying a resume-break service, and if it is a TCP connection The connection initiates the release, and if it is another TCP connection, the first information may be ignored and the release is not initiated.
  • the SMF1 sends the first information through the control plane to the application server carrying the resumed transmission service, in other words, the connection between the SMF1 and the terminal device is directly sent as a TCP connection It should be noted that if the application server provides enough information about itself when subscribing to the SMF1 for the first information, the SMF1 can only send the first information to the application server carrying the resumed transmission service.
  • this PDU session is a PDU session for which SMF1 decides to perform UPF reselection.
  • SMF1 may send the first information through the Nsmf_EventExposure_Notify service.
  • the SMF1 may directly send the first information to all associated application servers or application servers carrying the resume-break service.
  • the SMF1 may send the first information to the NEF, and forward the first information to all associated application servers or application servers that carry the resume-break service through the NEF.
  • the first information is subscribed to the SMF1 by the application server in advance.
  • the first information is subscribed when all associated application servers subscribe to SMF1 for early notification information.
  • the application server carrying the resume-break service when subscribing to SMF1 for the first information, the application server carrying the resume-break service also indicates that SMF1 needs to wait for its own first feedback information, and the first feedback information is used in applications that carry resume-break services. Sent when the server finishes releasing the TCP connection.
  • the application server when subscribing to the SMF1 for the first information, the application server that does not carry a service of the type of resumable transmission at a break point indicates that the SMF1 does not need to wait for its own first feedback information at the same time.
  • all the application servers associated with the PDU session have at least one application server indicating that they need to wait for their own first feedback information when subscribing, it indicates that there is a service that needs to be resumed on the PDU session.
  • the application server receives the first information, and further releases the TCP connection according to the first information.
  • the SMF1 sends the first information to all associated application servers, and the application server receives the first information and first determines whether it carries the resume-break service. If it carries the resume-break service, further , and release the TCP connection according to the first information.
  • the SMF1 sends the first information to the application server carrying the resume-break service, and the application server carrying the resume-break service receives the first information, and further releases the TCP according to the first information. connect.
  • the SMF1 determines that the TCP connection has been released, and further, the SMF1 triggers the release process of the original PDU session.
  • the SMF1 starts a timer after sending the first information to the application server, and after the first time elapses, the SMF1 determines that the TCP connection has been released, and further triggers the release process of the original PDU session.
  • a time is the time required for the SMF1 default TCP connection to be released.
  • the SMF1 receives the first feedback information to determine that the TCP connection has been released, and the first feedback information is sent to the SMF1 after the application server releases the TCP connection.
  • the SMF1 further triggers the release of the original PDU session.
  • all application servers associated with SMF1 indicate that SMF1 does not need to wait for the first feedback information when subscribing to the first information, and then SMF1 immediately triggers the release of the original PDU session after sending the first information.
  • SMF1 triggers the release process steps of the original PDU session, please refer to method 800.
  • the SMF1 notifies the application server through the control plane that the network should release the original PDU session, perform UPF reselection, and create a new PDU session to connect to the same DN.
  • the application server After the application server receives the first information, it actively executes the process of releasing the TCP connection with the terminal device carrying the resumed transmission service, and synchronizes the TCP sending and receiving status between the terminal device and the application server. Due to the synchronization of the TCP transceiver status between the terminal device and the application server, the retransmission of successfully transmitted data is avoided. In addition, due to the active execution of the TCP connection release process, the retransmission of undelivered data on the TCP connection is avoided.
  • the method of this embodiment can reduce the waste of air interface resources and avoid increasing the transmission delay of the breakpoint part.
  • the method 1000 includes:
  • SMF1 decides to perform UPF reselection.
  • the SMF1 sends the first information to the terminal device or the application server.
  • the first information indicates that the PDU session is about to be released, and indirectly instructs the terminal device or the application server to release the TCP connection.
  • a connection belongs to a PDU session.
  • the first information directly instructs the terminal device or the application server to release the TCP connection.
  • the SMF1 may directly send the first information to the UPF, and the UPF directly includes the first information into the packet header of the UPF data packet.
  • the SMF1 may send the first signaling to the UPF, and the UPF generates the first information according to the first signaling, and includes the first information in the packet header of the UPF data packet.
  • the first information or the first signaling sent by the SMF1 to the UPF1 may specifically be an N4 Session Modification Request.
  • the UPF1 may also reply information to the SMF1, and then perform the action of adding the first information or adding the first information generated by the first signaling to the packet header of the data packet.
  • the reply information may specifically be an N4 Session Modification Response.
  • the terminal device or the application server receives the first information, and further releases the TCP connection according to the first information.
  • the application server decapsulates the uplink data packet and receives the first information
  • the terminal device decapsulates the downlink data packet and receives the first information
  • the SMF1 determines that the TCP connection has been released, and further, the SMF1 triggers the release process of the original PDU session.
  • the SMF1 when the SMF1 sends the first information or the first signaling to the UPF, it starts a timer. When the timer elapses for the first time, and the SMF1 determines that the TCP connection has been released, it initiates the release process of the PDU session. The first time The time required for the SMF1 default TCP connection release.
  • the process of releasing and re-establishing the PDU session is the same as in method 800 .
  • SMF1 or SMF2 is only an example, and represents switching from one original SMF to another target SMF, and may also be represented by SMF3 or SMF4 or the like.
  • UPF1 and UPF2 are only exemplary, representing the original PDU session path and the newly created PDU session path, and may also be UPF3, UPF4, and so on.
  • SMF1 notifies the terminal device or the application server by sending the first information through the user plane.
  • the first information exists in the IP header or TCP header of the data packet and can specifically instruct the terminal device and the application carrying the resume transmission service.
  • the server disconnects the TCP connection in the middle, and after receiving the notification, the terminal device or the application server actively executes the release process of the TCP connection carrying the resumed transmission service, and synchronizes the TCP sending and receiving status between the terminal device and the application server. Due to the synchronization of the TCP transceiver status between the terminal device and the application server, the retransmission of successfully transmitted data is avoided. In addition, due to the active execution of the TCP connection release process, the retransmission of undelivered data on the TCP connection is avoided.
  • This embodiment can reduce the waste of air interface resources and avoid increasing the transmission delay of the breakpoint part.
  • FIG. 11 shows a schematic block diagram of a communication apparatus 1100 according to an embodiment of the present application, and the communication apparatus 1100 may be used to execute the methods or steps corresponding to the foregoing method SMF1.
  • each unit in the communication apparatus 1100 may be implemented by software.
  • the communication apparatus can be configured to execute the method or step corresponding to SMF1 in the method 800.
  • the apparatus is shown in FIG. 11 , and the communication apparatus 1100 includes:
  • the transceiver unit 1110 is configured to send the first information.
  • the processing unit 1120 is configured to release the PDU session after determining that the TCP connection has been released.
  • the first information indicates that the PDU session is about to be released, and indirectly instructs the terminal device to release the TCP connection, where the TCP connection is a TCP connection between the terminal device and the application server that bears the resumed transmission service, and the TCP connection belongs to the PDU session. .
  • the first information directly instructs the terminal device to release the TCP connection.
  • the content of the first information may be PDU Session Modification Command.
  • the transceiver unit 1110 may send the first information to the terminal device through the AMF.
  • the transceiver unit 1110 may send the first information through the Namf_Communication_N1N2MessageTransfer service of the AMF.
  • processing unit 1120 is further configured to decide to perform UPF reselection of a PDU session, and the PDU session is the PDU session for which the processing unit 1120 decides to perform UPF reselection.
  • the processing unit 1120 is further configured to start a timer.
  • the timer may be a UPF relocation timer.
  • the processing unit 1120 determines that the TCP connection has been released, which is an indirect determination. The processing unit 1120 defaults to the first time after the TCP connection has been released, and then initiates the release of the PDU session.
  • the transceiver unit 1110 is further configured to receive second feedback information, the second feedback information is sent by the terminal device after receiving the first information, and the processing unit 1120 receives the second feedback information after receiving the second feedback information.
  • a timer is started.
  • the timer may be a UPF relocation timer.
  • the processing unit 1120 determines that the TCP connection has been released, which is an indirect determination.
  • the processing unit 1120 defaults that after the first time elapses, the TCP connection has been released, and then initiates the release of the PDU session.
  • the transceiver unit 1110 receives the first feedback information from the terminal device, the first feedback information indicates that the TCP connection has been released, the processing unit 1120 directly determines that the TCP connection has been released, and then initiates a PDU session release.
  • the release of the PDU session specifically includes: as an example but not a limitation, the transceiver unit 1110 can send the N1 SM Information to the terminal device by calling the Namf_Communication_N1N2MessageTransfer service of the AMF, and the N1 SM Information includes a PDU session release instruction, and the instruction includes the PDU session ID and Reason for re-establishing the PDU session to the same DN.
  • the network and the terminal device complete the process of releasing the original PDU session.
  • the terminal device receives the PDU session release instruction, generates a new PDU session ID, and initiates a PDU session establishment process.
  • AMF selects SMF2, and SMF2 selects UPF2.
  • the network and the terminal device complete the re-establishment of the PDU session of SSC mode 2.
  • the communication apparatus may be configured to execute the method or step corresponding to SMF1 in the method 900.
  • the apparatus is shown in FIG. 11 , and the communication apparatus 1100 includes:
  • the transceiver unit 1110 is configured to send the first information.
  • the processing unit 1120 is configured to release the PDU session after determining that the TCP connection has been released.
  • the first information indicates that the PDU session is about to be released, and indirectly instructs the application server to release the TCP connection. PDU session.
  • the first information directly instructs the application server to release the TCP connection.
  • the transceiver unit 1110 sends the first information to the application server, and the first information may actually be received by the application function network element in the application server.
  • the application function network element is mainly responsible for the control plane function, interacts with the 5G core network, and applies
  • the server is mainly responsible for the user plane function and transmits service data with the terminal device.
  • one PDU session corresponds to one terminal device, and one terminal device can be connected to at least one application server through at least one TCP connection, and some of the at least one TCP connection bears the resume transmission service, and some bears other services.
  • the TCP connection is located between the terminal device and the application server, and bears the resumed transmission service from a breakpoint.
  • the transceiver unit 1110 sends the first information to all associated application servers through the control plane, and the application server determines whether the connection between it and the terminal device is a TCP connection that carries the resume transmission service. If it is a TCP connection, the release is initiated. If it is another TCP connection, the first information may be ignored and the release is not initiated.
  • the transceiver unit 1110 sends the first information through the control plane to the application server carrying the resume-break service, in other words, directly sends the first information to the connection with the terminal device as It should be noted that if the application server provides enough information about itself when subscribing to the SMF1 for the first information, the transceiver unit 1110 can only send the first information to the application server carrying the resumed transmission service. a message.
  • the processing unit is further configured to decide to perform UPF reselection of a PDU session, and the PDU session is the PDU session for which the processing unit 1120 decides to perform UPF reselection.
  • the transceiving unit 1110 may send the first information through the Nsmf_EventExposure_Notify service.
  • the transceiver unit 1110 may directly send the first information to all associated application servers.
  • the transceiver unit 1110 may send the first information to the NEF, and forward it to all associated application servers via the NEF.
  • the first information is subscribed by the application server to the processing unit 1120 in advance.
  • the first information is subscribed when all associated application servers subscribe to the processing unit 1120 for early notification information.
  • the application server that bears the resumed transmission service at the same time instructs the processing unit 1120 that it needs to wait for its own first feedback information, and the first feedback information resumes transmission when the transmission is interrupted. It is sent after the application server of the similar service completes the release of the TCP connection.
  • the application server that does not carry a service of the type of resumable transmission, at the same time instructs the processing unit 1120 that the processing unit 1120 does not need to wait for its own first feedback information.
  • all the application servers associated with the PDU session have at least one application server indicating that they need to wait for their own first feedback information when subscribing, it indicates that there is a service that needs to be resumed on the PDU session.
  • the transceiver unit 1110 starts a timer after sending the first information to the application server, and after the first time elapses, the processing unit 1120 determines that the TCP connection has been released, and further triggers the release of the original PDU session Flow, the first time is the time required by the processing unit 1120 to release the TCP connection by default.
  • the transceiver unit 1110 receives first feedback information to determine that the TCP connection has been released, and the first feedback information is sent to the transceiver unit 1110 after the application server releases the TCP connection.
  • the processing unit 1120 triggers the release of the original PDU session.
  • all application servers associated with the processing unit 1120 instruct the processing unit 1120 not to wait for the first feedback information when subscribing to the first information, and the transceiver unit 1110 triggers the original PDU session immediately after sending the first information release.
  • the communication apparatus may be configured to execute the method or step corresponding to SMF1 in the method 1000.
  • the apparatus is shown in FIG. 11 , and the communication apparatus 1100 includes:
  • the transceiver unit 1110 is configured to send the first information.
  • the processing unit 1120 is configured to release the PDU session after determining that the TCP connection has been released.
  • the first information indicates that the PDU session is about to be released, and indirectly instructs the terminal device or the application server to release the TCP connection.
  • a connection belongs to a PDU session.
  • the first information directly instructs the terminal device or the application server to release the TCP connection.
  • the transceiver unit 1110 may directly send the first information to the UPF, and the UPF directly includes the first information into the packet header of the UPF data packet.
  • the transceiver unit 1110 may send the first signaling to the UPF, and the UPF generates the first information according to the first signaling, and includes the first information in the packet header of the UPF data packet.
  • the first information or the first signaling sent by the transceiver unit 1110 to the UPF1 may specifically be an N4 Session Modification Request.
  • the UPF1 can also reply the information to the transceiver unit 1110, and then perform the action of adding the first information or adding the first information generated by the first signaling to the data packet header.
  • the reply information may specifically be an N4 Session Modification Response.
  • the transceiver unit 1110 starts a timer when sending the first information or the first signaling to the UPF.
  • the processing unit 1120 determines that the TCP connection has been released, and then initiates a timer.
  • the first time is the time required by the processing unit 1120 to release the TCP connection by default.
  • the process of releasing the PDU session is the same as the above.
  • FIG. 11 shows a schematic block diagram of a communication apparatus 1100 according to an embodiment of the present application, where the communication apparatus 1100 may be used to execute the methods or steps corresponding to the terminal device or the application server of the foregoing method.
  • each unit in the communication apparatus 1100 may be implemented by software.
  • the communication apparatus may be configured to execute the method or step corresponding to the terminal device in the method 800.
  • the apparatus is shown in FIG. 11 , and the communication apparatus 1100 includes:
  • the transceiver unit 1110 is configured to receive the first information.
  • the processing unit 1120 is configured to release the TCP connection according to the first information.
  • the transceiver unit 1110 upon receiving the first information, the transceiver unit 1110 immediately sends the second feedback information to the SMF1 through the AMF, and then the processing unit 1120 releases the TCP connection according to the first information, and the second feedback information indicates that the transmission and reception information is received.
  • Unit 1110 receives the first message.
  • the second feedback information may be Ack, and the second feedback information is used to notify the SMF1 that the transceiver unit 1110 has received the first information.
  • the processing unit 1120 initiates a process of releasing the TCP connection according to the first information.
  • the transceiver unit 1110 is further configured to send the first message to SMF1.
  • a feedback information indicates that the TCP connection has been released, as an example and not a limitation, the first feedback information may be sent to the SMF1 through the AMF.
  • the communication apparatus can be used to execute the method or step of the application server in the method 900.
  • the apparatus is shown in FIG. 11 , and the communication apparatus 1100 includes:
  • the transceiver unit 1110 is configured to receive the first information.
  • the processing unit 1120 is configured to release the TCP connection according to the first information.
  • the SMF1 sends the first information to all associated transceiver units 1110, and the transceiver unit 1110 receives the first information.
  • the processing unit 1120 first determines whether it carries the breakpoint resume service. For resuming the transmission service, further, the processing unit 1120 releases the TCP connection according to the first information.
  • the SMF1 sends the first information to the transceiver unit 1110 carrying the resume-break service, and the transceiver unit 1110 carrying the resume-break service receives the first information; further, the processing unit 1120 Release the TCP connection according to the first information.
  • the transceiver unit 1110 is further configured to send first feedback information to the SMF1, where the first feedback information indicates that the TCP connection has been released.
  • the communication apparatus can be used to execute the method or step corresponding to the terminal device or the application server in the method 1000.
  • the apparatus is shown in FIG. 11 , and the communication apparatus 1100 includes:
  • the transceiver unit 1110 is configured to receive the first information.
  • the processing unit 1120 is configured to release the TCP connection according to the first information.
  • the transceiver unit 1110 decapsulates the uplink data packet to receive the first information, or the transceiver unit 1110 decapsulates the downlink data packet to receive the first information.
  • the technical effects achieved may refer to methods 800-1000.
  • FIG. 12 is a schematic diagram of another communication apparatus 1200 according to an embodiment of the present application.
  • each unit in the communication apparatus 1100 may be implemented by software.
  • the transceiver 1210 in the communication device 1200 performs actions similar to the transceiver unit 1110 in the communication device 1100, and the processor 1220 in the communication device 1200 performs actions similar to the processing unit 1120 in the communication device 1100.
  • the processing unit 1120 in the communication device 1100 For detailed methods and steps, please refer to Description in Communication Device 1100 .
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

Landscapes

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

Abstract

La présente demande fournit un procédé de gestion d'une session d'unité de données de protocole (PDU) et un dispositif de communication. Le procédé consiste à : envoyer, par un élément de réseau à fonction de gestion de session et à un premier dispositif de transmission de données, des premières informations indiquant qu'une session de PDU va se libérer ; déterminer, par l'élément de réseau à fonction de gestion de session, que la connexion de protocole de commande de transmission (TCP) entre le premier dispositif de transmission de données et un second dispositif de transmission de données a été libérée selon les premières informations, la connexion de TCP portant un service de reprise de point d'arrêt et la session de PDU comprenant la connexion de TCP ; et libérer, par l'élément de réseau à fonction de gestion de session, la session de PDU. Le premier dispositif de transmission de données reçoit les premières informations et libère la connexion de TCP selon les premières informations. Le procédé et le dispositif de communication proposés par la présente demande peuvent réduire le gaspillage de ressources d'interface radio et empêcher une augmentation du retard de transmission à une partie de point d'arrêt.
PCT/CN2021/091512 2021-04-30 2021-04-30 Procédé de gestion de session d'unité de données de protocole (pdu) et dispositif WO2022227010A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/091512 WO2022227010A1 (fr) 2021-04-30 2021-04-30 Procédé de gestion de session d'unité de données de protocole (pdu) et dispositif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/091512 WO2022227010A1 (fr) 2021-04-30 2021-04-30 Procédé de gestion de session d'unité de données de protocole (pdu) et dispositif

Publications (1)

Publication Number Publication Date
WO2022227010A1 true WO2022227010A1 (fr) 2022-11-03

Family

ID=83847487

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/091512 WO2022227010A1 (fr) 2021-04-30 2021-04-30 Procédé de gestion de session d'unité de données de protocole (pdu) et dispositif

Country Status (1)

Country Link
WO (1) WO2022227010A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108738086A (zh) * 2017-04-21 2018-11-02 华为技术有限公司 一种用户面重选的方法及装置
CN110063084A (zh) * 2016-10-07 2019-07-26 Lg电子株式会社 在无线通信系统中选择会话和服务连续性模式的方法及其装置
CN110582126A (zh) * 2018-06-11 2019-12-17 华为技术有限公司 一种通信方法及装置
WO2020067677A1 (fr) * 2018-09-27 2020-04-02 삼성전자 주식회사 Procédé d'exploitation d'une application nécessitant une communication avec un dispositif externe, et dispositif électronique associé
CN111586670A (zh) * 2020-04-30 2020-08-25 腾讯科技（深圳）有限公司 用于实现业务连续性的方法及相关设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110063084A (zh) * 2016-10-07 2019-07-26 Lg电子株式会社 在无线通信系统中选择会话和服务连续性模式的方法及其装置
CN108738086A (zh) * 2017-04-21 2018-11-02 华为技术有限公司 一种用户面重选的方法及装置
CN110582126A (zh) * 2018-06-11 2019-12-17 华为技术有限公司 一种通信方法及装置
WO2020067677A1 (fr) * 2018-09-27 2020-04-02 삼성전자 주식회사 Procédé d'exploitation d'une application nécessitant une communication avec un dispositif externe, et dispositif électronique associé
CN111586670A (zh) * 2020-04-30 2020-08-25 腾讯科技（深圳）有限公司 用于实现业务连续性的方法及相关设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VIVO: "Newly added UE behaviour for eEDGE in SSC mode 2 and 3", 3GPP DRAFT; S2-2102741, vol. SA WG2, 6 April 2021 (2021-04-06), pages 1 - 4, XP051994115 *

Similar Documents

Publication Publication Date Title
US11937131B2 (en) Resume request followed by release and redirect
JP6105665B2 (ja) インターネットプロトコルマルチメディアサブシステム協調セッションにおける識別および移転のための方法および装置
WO2019076306A1 (fr) Procédé de traitement de canal de transmission de données, appareil et système
WO2011035100A2 (fr) Procédé et appareil de fourniture d'une communication poste à poste au moyen d'une connexion réseau
US11419027B2 (en) User plane link establishment method, base station, and mobility management device
WO2021042653A1 (fr) Procédé de commutation de trajet, appareil de communication et système de communication
WO2009015525A1 (fr) Procédé de commutation de voie de commande de session de service centralisé de sous-système réseau central multimédia ip
US11722574B2 (en) Packet transmission method, communication apparatus, and communication system
TWI792415B (zh) Ue和網路之間的多存取pdu會話狀態同步
WO2018068598A1 (fr) Procédé de gestion de session, entité fonctionnelle de gestion mobile et entité fonctionnelle de gestion de session
CN111787580A (zh) 一种数据流处理方法、设备及存储介质
US8914049B2 (en) Method for managing a status of a mobile station in a wireless network
JP2023534597A (ja) リロケーション時にエッジアプリケーションサーバへのシームレスなサービス継続性を調整するためのメカニズム
US20110173292A1 (en) Push based inter-operator inter-device transfer
US20230018378A1 (en) Parameter configuration method, apparatus and system, device and storage medium
WO2022227010A1 (fr) Procédé de gestion de session d'unité de données de protocole (pdu) et dispositif
US20110205937A1 (en) Pull based inter-operator inter-device transfer
WO2021134756A1 (fr) Procédé et dispositif de commutation de liaison, et dispositif de communication
JP7377987B2 (ja) 通信サービスを提供する通信ネットワーク構成及び方法
TWI805465B (zh) 3gpp會話建立進程的改進方法及其使用者設備
CN113993169B (zh) 数据传输方式的更改方法、装置、设备及存储介质
WO2022179500A1 (fr) Procédé et appareil de communication
WO2023045839A1 (fr) Procédé, appareil et dispositif de communication et dispositif de réseau central
WO2022165787A1 (fr) Procédé et appareil de configuration de paramètres, dispositif, et support de stockage
JP7493622B2 (ja) データ転送のサポート

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21938484

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21938484

Country of ref document: EP

Kind code of ref document: A1