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EP-4187960-B1 - DETERMINISTIC TRANSMISSION METHOD, COMMUNICATION APPARATUS, AND STORAGE MEDIUM

EP4187960B1EP 4187960 B1EP4187960 B1EP 4187960B1EP-4187960-B1

Inventors

  • YING, Jiangwei
  • YANG, YANMEI

Dates

Publication Date
20260506
Application Date
20210607

Claims (14)

  1. A deterministic transmission method, wherein the method comprises: receiving (S702), by a first network element, the first network element being a core network device, deterministic transmission capability information of a first switching node from a radio access network device and deterministic transmission capability information of a second switching node from a user plane function, UPF, wherein the first switching node comprises the radio access network device and a terminal, and the second switching node comprises the UPF; wherein the radio access network device is a network device in a radio access network; generating (S706), by the first network element, a first scheduling policy and a second scheduling policy based on the deterministic transmission capability information of the first switching node and the deterministic transmission capability information of the second switching node; and sending (S707), by the first network element, the first scheduling policy to the radio access network device, and sending (S708), by the first network element, the second scheduling policy to the UPF; characterized in that before the generating, by the first network element, a first scheduling policy and a second scheduling policy based on the deterministic transmission capability information of the first switching node and the deterministic transmission capability information of the second switching node, the method further comprises: receiving (S705), by the first network element, a deterministic service transmission request from a second network element; and the generating, by the first network element, a first scheduling policy and a second scheduling policy based on the deterministic transmission capability information of the first switching node and the deterministic transmission capability information of the second switching node comprises: generating, by the first network element, the first scheduling policy and the second scheduling policy based on the deterministic transmission capability information of the first switching node, the deterministic transmission capability information of the second switching node, and the deterministic service transmission request.
  2. The method according to claim 1, wherein the method further comprises: receiving, by the first network element, updated deterministic transmission capability information of the first switching node from the radio access network device, and/or updated deterministic transmission capability information of the second switching node from the UPF.
  3. The method according to any one of claims 1 to 2, wherein the first network element is any one of the following network elements: a first centralized network configuration CNC, a policy control function PCF, a network exposure function NEF, and a session management function , SMF.
  4. The method according to claim 3, wherein when the first network element is the SMF, the method further comprises: receiving, by the first network element, a deterministic transmission indication from the terminal.
  5. The method according to claim 4, wherein the method further comprises: sending, by the first network element, the deterministic transmission indication to the radio access network device.
  6. The method according to claim 3, wherein when the first network element is the SMF, the method further comprises: receiving, by the first network element, a deterministic transmission indication from the radio access network device.
  7. The method according to any one of claims 4 to 6, wherein the method further comprises: sending, by the first network element, the deterministic transmission indication to the UPF.
  8. The method according to claim 3, wherein the receiving, by a first network element, deterministic transmission capability information of a first switching node from a radio access network device and deterministic transmission capability information of a second switching node from a UPF comprises: receiving, by the first network element, the deterministic transmission capability information of the first switching node and the deterministic transmission capability information of the second switching node from the SMF, wherein the deterministic transmission capability information of the first switching node is sent by the radio access network device to the SMF, and the deterministic transmission capability information of the second switching node is sent by the UPF to the SMF; and the sending, by the first network element, the first scheduling policy to the radio access network device, and sending the second scheduling policy to the UPF comprises: sending, by the first network element through the SMF, the first scheduling policy to the radio access network device, and sending, by the first network element through the SMF, the second scheduling policy to the UPF.
  9. The method according to claim 1, wherein the second network element is a first centralized user configuration, CUC, or an application function, AF.
  10. The method according to claim 1, wherein before the generating, by the first network element, a first scheduling policy and a second scheduling policy based on the deterministic transmission capability information of the first switching node and the deterministic transmission capability information of the second switching node, the method further comprises: receiving, by the first network element, a third scheduling policy from a second CNC; and the generating, by the first network element, a first scheduling policy and a second scheduling policy based on the deterministic transmission capability information of the first switching node and the deterministic transmission capability information of the second switching node comprises: generating, by the first network element, the first scheduling policy and the second scheduling policy according to the third scheduling policy, the deterministic transmission capability information of the first switching node, and the deterministic transmission capability information of the second switching node.
  11. The method according to claim 10, wherein before the receiving, by the first network element, a third scheduling policy from a second CNC, the method further comprises: generating, by the first network element, deterministic transmission capability information of a first network based on the deterministic transmission capability information of the first switching node and the deterministic transmission capability information of the second switching node; and sending, by the first network element, the deterministic transmission capability information of the first network to the second CNC.
  12. A computer program comprising instructions which, when the program is executed by a computer comprised in a core network device, cause the computer to perform the method according to any one of claims 1 to 11.
  13. A first network element, the first network element being a core network device, comprising a processor and an interface circuit, wherein the processor is configured to communicate with another apparatus through the interface circuit, and perform the method according to any one of claims 1 to 11.
  14. A computer-readable storage medium, comprising computer software instructions, wherein when the computer software instructions are run on a core network device or a chip built in the core network device, the core network device is enabled to perform the method according to any one of claims 1 to 11.

Description

TECHNICAL FIELD Embodiments of this application relate to the communication field, and in particular, to a deterministic transmission method, a communication apparatus, and a storage medium. BACKGROUND Time-sensitive networking (time sensitive networking, TSN) may enable an Ethernet to be real-time and deterministic to ensure transmission reliability of delay-sensitive service data, and can predict an end-to-end transmission delay, to meet requirements in fields such as automobile control and industrial Internet. To implement end-to-end deterministic transmission in a fifth generation mobile communication system (5th-generation system, 5GS), the 5GS may be simulated as a switching node (bridge) in the TSN. For example, the entire 5GS may serve as a bridge in the TSN, and send information about the 5GS to a centralized network configuration (centralized network configuration, CNC) in the TSN network. The CNC may generate a scheduling policy based on the information about the 5GS and a deterministic service transmission requirement that comes from a centralized user configuration (centralized user configuration, CUC) in the TSN network, and send the scheduling policy to the 5GS. The 5GS can implement deterministic transmission according to the scheduling policy sent by the CNC. However, in the existing manner in which the 5GS is simulated as the bridge in the TSN to implement end-to-end deterministic transmission in the 5GS, both a radio access network (radio access network, RAN) and a UPF perform data transmission based on best effort (best effort). This is easy to cause a large delay variation of a quality of service (quality of service, QoS) flow carrying a TSN flow in the 5GS, thereby increasing a delay indicator of the QoS flow. In addition, each network element in the 5GS can view only a partial situation of data transmission but cannot view an overall link situation of the data transmission, and consequently cannot dynamically balance network resources between different QoS flows for different user equipments (user equipment, UE). WO 2020/150333 A1 describes a control plane based configuration for time sensitive networking. WO 2020/101946 A1 describes an output pacing in a cellular communications system serving as a time-sensitive networking (TSN) node. SUMMARY The present invention is defined by the subject-matter of the independent claims. Additional features of the invention are presented in the dependent claims. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of a fully centralized configuration model of a time-sensitive network;FIG. 2 is a schematic diagram of composition of a 5G system;FIG. 3 is a schematic diagram of a system architecture of interworking between a 5G system and a TSN;FIG. 4 is a schematic diagram of composition of an existing time-sensitive network based on a 5G system;FIG. 5 is a schematic diagram of composition of a time-sensitive network based on a 5G system according to an embodiment of this application;FIG. 6 is a schematic diagram of composition of a network device according to an embodiment of this application;FIG. 7 is a schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 8A and FIG. 8B are another schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 9A, FIG. 9B, and FIG. 9C are still another schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 10A, FIG. 10B, and FIG. 10C are still another schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 11A, FIG. 11B, and FIG. 11C are still another schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 12A, FIG. 12B, and FIG. 12C are still another schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 13A, FIG. 13B, and FIG. 13C are still another schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 14 is a schematic diagram of composition of a second time-sensitive network according to an embodiment of this application;FIG. 15 is still another schematic flowchart of a deterministic transmission method according to an embodiment of this application;FIG. 16 is a schematic diagram of a structure of a communication apparatus according to an embodiment of this application;FIG. 17 is another schematic diagram of a structure of a communication apparatus according to an embodiment of this application;FIG. 18 is still another schematic diagram of a structure of a communication apparatus according to an embodiment of this application;FIG. 19 is still another schematic diagram of a structure of a communication apparatus according to an embodiment of this application; andFIG. 20 is still another schematic diagram of a structure of a comm