CN117222034A - Method and system for transmitting delay-sensitive network data - Google Patents
Method and system for transmitting delay-sensitive network data Download PDFInfo
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Abstract
The invention provides a method and a system for transmitting delay-sensitive network data, which relate to the technical field of communication, and the method comprises the following steps: generating V2X policy information and/or ProSe policy information for direct connection time synchronization service and direct connection deterministic transmission service based on capability information sent by UE, policy information sent by TSN AF and UE subscription information; configuring a V2X policy and/or a ProSe policy for the UE based on the V2X policy information and/or the ProSe policy information; and transmitting a V2X strategy and/or a ProSe strategy to the initial UE so that the initial UE establishes an end-to-end direct connection data surface link with the target UE. By the method, the terminal equipment for realizing direct communication based on the 3GPP communication system can transmit time synchronization service data and delay sensitive data.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a system for transmitting delay-sensitive network data.
Background
The conventional 3GPP (the 3rd Generation Partnership Project) communication system cannot achieve the transmission of time-synchronized service data and delay-sensitive data.
The existing 5G TSN (Time Sensitive Network ) protocol supports transmission of time synchronization service data and delay sensitive data based on the TSN protocol based on the traditional IEEE TSN network architecture and protocol. The 5G TSN can be used as a logic network bridge in a TSN network system to realize transmission of TSN network time synchronization protocol and time delay sensitive data, and the 5G network is used as a part of the TSN network through system integration of the 5G network and the TSN network, so that the TSN protocol data can be transmitted through the 5G wireless network.
However, the existing 5G TSN protocol cannot be directly applied to a terminal (UE) device for implementing direct communication based on a 3GPP communication system, so that transmission of time synchronization service data and delay sensitive data cannot be implemented between terminal devices for implementing direct communication based on the 3GPP communication system.
Disclosure of Invention
The invention provides a method and a system for transmitting time delay sensitive network data, which are used for solving the defect that the transmission of time synchronization service data and time delay sensitive data cannot be realized between terminal devices which realize direct communication based on a 3GPP communication system in the prior art.
The invention provides a transmission method of delay-sensitive network data, which is applied to a network side PCF and comprises the following steps: receiving capability information sent by UE; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information; receiving strategy information sent by TSN AF; receiving UE subscription information sent by a UDM; generating V2X strategy information and/or ProSe strategy information for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the capability information sent by the UE, the strategy information sent by the TSN AF and the UE subscription information; configuring a V2X policy and/or a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the V2X policy information and/or the ProSe policy information; transmitting a V2X policy and/or a ProSe policy to an initial UE, so that the initial UE establishes an end-to-end direct connection data plane link with a target UE based on the V2X policy and/or the ProSe policy; wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data.
According to the transmission method of the delay sensitive network data provided by the invention, before the V2X strategy and/or the ProSe strategy are sent to the initial UE, the transmission method comprises the following steps: determining data required by the V2X policy information based on the direct connection time synchronization service type policy information and the direct connection deterministic transmission service type policy information in the V2X application, and/or determining data required by the ProSe policy information based on the direct connection time synchronization service type policy information and the direct connection deterministic transmission service type policy information in the ProSe application; the data required by the V2X policy information includes a PC5 QoS parameter of a direct connection time synchronization service based on 5g V2X, a PC5 QoS parameter of a direct connection deterministic transmission service based on 5g V2X, a PLMN providing V2X service, an access network providing V2X service, frequency information, geographic area policy information, a radio access type of the direct connection time synchronization service, a radio access type of the direct connection deterministic transmission service, a radio parameter, a service range, configuration information for discovery exploration, a scheduling policy of deterministic data flows; the data required by ProSe policy information includes PC5 QoS parameters of a direct connection time synchronization service based on 5G ProSe, PC5 QoS parameters of a direct connection deterministic transmission service based on 5G ProSe, PLMNs providing ProSe services, access networks providing ProSe services, frequency information, geographical area policy information, radio access type of the direct connection time synchronization service, radio access type of the direct connection deterministic transmission service, radio parameters, service scope, configuration information for exploring discovery, scheduling policy of deterministic data flows.
According to the transmission method of delay sensitive network data provided by the invention, the strategy information sent by the TSN AF comprises QoS indexes of end-to-end time synchronization service and deterministic transmission service, flow characteristics of data flow and scheduling strategy information; the QoS metrics of the end-to-end time synchronization service and the deterministic transmission service include the transmission budget for direct-to-time synchronization transmission and the transmission budget for direct-to-delay sensitive data.
The invention also provides a transmission method of the delay-sensitive network data, which is applied to the UE and comprises the following steps: when network registration is carried out, capability information is sent to a network side; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information; determining a V2X policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the V2X policy information, and/or determining a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the ProSe policy information; receiving a V2X strategy and/or a ProSe strategy sent by a PCF at a network side; when an initial UE sends a direct connection time synchronization service request and/or a direct connection deterministic transmission service request to a target UE, the initial UE establishes an end-to-end direct connection data plane link with the target UE based on a V2X strategy and/or a ProSe strategy; wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data.
According to the method for transmitting the delay-sensitive network data provided by the invention, before the initial UE sends the direct connection time synchronization service request and/or the direct connection deterministic transmission service request to the target UE, the method comprises the following steps: determining direct connection time synchronization service type policy information and direct connection deterministic transmission service type policy information in a V2X application and/or determining direct connection time synchronization service type policy information and direct connection deterministic transmission service type policy information in a ProSe application; the direct-connection time synchronization service policy type information and the direct-connection deterministic transmission service type policy information determined in the V2X application comprise a PC5 QoS parameter of the direct-connection time synchronization service based on 5G V2X, a PC5 QoS parameter of the direct-connection deterministic transmission service based on 5G V2X, a PLMN providing the V2X service, an access network providing the V2X service, allowed frequency information and geographic area policy information; the direct time synchronization service type policy information and the direct deterministic transmission service type policy information determined in the ProSe application include PC5 QoS parameters of a 5 gprosi-based direct time synchronization service, PC5 QoS parameters of a 5G ProSe-based direct deterministic transmission service, PLMNs providing ProSe services, access networks providing ProSe services, allowed frequency information, geographical area policy information.
According to the transmission method of delay sensitive network data provided by the invention, an initial UE establishes an end-to-end direct connection data surface link with a target UE based on a V2X strategy and/or a ProSe strategy, and the method comprises the following steps: the initial UE sends a direct link establishment request to the target UE based on a V2X strategy and/or a ProSe strategy; the direct link establishment request comprises QoS information of a direct link, service type information and Layer2 ID identification information of the direct link; responding to a response message corresponding to a direct link establishment request returned by the target UE, and completing the establishment of an end-to-end direct data surface link between the target UE and the target UE; the response message includes QoS information, service type information, and security parameters of the direct link.
According to the method for transmitting delay-sensitive network data provided by the invention, after the initial UE establishes an end-to-end direct connection data plane link with the target UE based on the V2X strategy and/or the ProSe strategy, the method further comprises the following steps: based on the end-to-end direct connection data surface link, transmitting time synchronization service data between the initial UE and the target UE through a time synchronization protocol; based on the end-to-end direct data plane link, the deterministic transmission service data between the initial UE and the target UE is transmitted through a scheduling policy.
The invention also provides a network device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the transmission method of the delay-sensitive network data applied to the network PCF when executing the program.
The invention also provides a terminal comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the transmission method of the time delay sensitive network data applied to the UE according to any one of the above when executing the program.
The invention also provides a transmission system of the time delay sensitive network data, which comprises a network PCF and UE; the network-side PCF is configured to: receiving capability information sent by UE; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information; receiving strategy information sent by TSN AF; receiving UE subscription information sent by a UDM; generating V2X strategy information and/or ProSe strategy information for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the capability information sent by the UE, the strategy information sent by the TSN AF and the UE subscription information; configuring a V2X policy and/or a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the V2X policy information and/or the ProSe policy information; transmitting a V2X policy and/or a ProSe policy to an initial UE, so that the initial UE establishes an end-to-end direct connection data plane link with a target UE based on the V2X policy and/or the ProSe policy; wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data; the UE is configured to: when network registration is carried out, capability information is sent to a network side; determining a V2X policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the V2X policy information, and/or determining a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the ProSe policy information; receiving a V2X strategy and/or a ProSe strategy sent by a PCF at a network side; when the initial UE sends a direct connection time synchronization service request and/or a direct connection deterministic transmission service request to the target UE, the initial UE establishes an end-to-end direct connection data plane link with the target UE based on a V2X policy and/or a ProSe policy.
The invention provides a method and a system for transmitting delay-sensitive network data, which are applied to a network-side PCF and comprise the following steps: receiving capability information sent by UE; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information; receiving strategy information sent by TSN AF; receiving UE subscription information sent by a UDM; generating V2X strategy information and/or ProSe strategy information for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the capability information sent by the UE, the strategy information sent by the TSN AF and the UE subscription information; configuring a V2X policy and/or a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the V2X policy information and/or the ProSe policy information; transmitting a V2X policy and/or a ProSe policy to an initial UE, so that the initial UE establishes an end-to-end direct connection data plane link with a target UE based on the V2X policy and/or the ProSe policy; wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data. By the above manner, since the 3GPP communication system has the capability of communicating based on the V2X and/or ProSe end-to-end direct communication standard, V2X policy information and/or ProSe policy information for direct-connection time synchronization service and direct-connection deterministic transmission service can be generated for the UE, then the V2X policy and/or ProSe policy for direct-connection time synchronization service and direct-connection deterministic transmission service can be configured for the UE based on the V2X policy and/or ProSe policy information, so that an end-to-end direct-connection data plane link between the UE based on the 3GPP communication system and the target UE can be established based on the generated V2X policy and/or ProSe policy, and time synchronization service data and/or deterministic transmission service data can be transmitted, and the time synchronization service data and delay sensitive data can be transmitted between the terminal equipment based on the 3GPP communication system to realize direct-connection communication.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a system architecture diagram of a prior art 5GS as a TSN bridge;
fig. 2 is a schematic flow chart of a method for transmitting delay-sensitive network data according to the present invention;
fig. 3 is a signaling diagram of a V2X/ProSe policy configuration flow provided by the present invention;
fig. 4 is a second flowchart of a method for transmitting delay-sensitive network data according to the present invention;
fig. 5 is a flow signaling diagram for establishing an end-to-end direct data plane link provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First, english appearing in the present invention will be briefly described:
TSN: time Sensitive Network, a time-sensitive network (or referred to as a delay-sensitive network);
V2X: vehicle to X, namely information exchange of the Vehicle to the outside;
ProSe: proximity based Services, nearby services;
OAM: operation Administration and Maintenance, operation management and maintenance;
QoS: quality of Service, quality of service;
DS-TT: device-Side TSN Translator, device-side TSN converter;
NW-TT: network-Side TSN Translator, network side TSN converter;
AN: access Network, access Network;
RAN: radio Access Network, wireless network access network;
UPF: user Plane Function, user plane function;
AMF: access and Mobility Management Function access and mobility management functions;
SMF: session Management Function, session management function;
UDM: unified Data Management, unified data management;
NEF: network Exposure Function, network open function;
PCF: policy Control Function, policy control function;
CNC: centralized network configuration, centralized network controller;
TSN AF: time Sensitive Network Time Sensitive Network, time-sensitive network application functions;
C-Plane: a control surface;
U-Plane: a user plane;
device side of Bridge: a device-side bridge;
5GC:5g core,5g core network;
5GS:5g system,5g system;
TSN System: a TSN system;
logical Bridge: a logical bridge.
Conventional 3GPP communication systems cannot achieve transmission of time-synchronized service data and delay-sensitive data.
The existing 5G TSN protocol supports protocols such as time synchronization and resource scheduling based on TSN on the basis of the traditional IEEE TSN network architecture and protocol, so that transmission of time synchronization service data and time delay sensitive data is realized. The 5G TSN can be used as a logic network bridge in a TSN network system to realize transmission of TSN network time synchronization protocol and time delay sensitive data, and the 5G network is used as a part of the TSN network through system integration of the 5G network and the TSN network, so that the TSN protocol data can be transmitted through the 5G wireless network.
Referring to fig. 1, fig. 1 is a system architecture diagram of a prior art TSN bridge with 5 GS.
Specifically, as shown in fig. 1, the 5G system may act as a logical bridge supporting TSN conversion functionality when the user plane and the control plane interoperate between the TSN system and the 5G system.
In fig. 1, UPF, AMF, SMF, (R) AN, UDM, NEF, PCF, TSN AF are network elements, N1, N2, N3, N4, N5, N7, N8, N9, N52, N33 are interfaces, and the connection relationship between the network elements is shown in fig. 1; where AN and RAN may be denoted as "(R) AN", and UE is a terminal.
The TSN conversion function may be implemented by a device side TSN converter and a network side TSN converter. The TSN AF is part of the 5GC, providing control plane conversion functionality for 5G system integration into the TSN network, e.g. interaction with CNC. The flow specific to 5G in the 5GC and RAN, e.g., wireless communication links, etc., is hidden from the TSN network. To achieve transparency of the 5G specific flow to the TSN network and to enable the 5GS to act as any TSN bridge, the 5GS may provide TSN input and output ports through the DS-TT and NW-TT.
Two end-to-end direct communication standards, namely a V2X-based 5G V2X end-to-end direct communication standard and a ProSe-based 5G ProSe end-to-end direct communication standard, are defined in the 3GPP communication system, so that the 3GPP communication system has the capability of communicating based on the V2X and ProSe end-to-end direct communication standards.
Specifically, starting from the 3GPP Rel-16 specification, 5G V2X technology was introduced into 3GPP systems. The 5G V2X technology is a technology for realizing direct information interaction between a vehicle and other entities (such as vehicles, infrastructures, pedestrians, networks and the like) by utilizing a 5G communication technology, and belongs to the vertical application of the 5G communication technology in the field of Internet of vehicles. The 3GPP Rel-17 standard combines the ProSe technology with the 5G technology for the first time, establishes a structure based on supporting ProSe by 5G, enables adjacent UE to perform direct communication under the condition of Network control or Network non-control, enables the UE to serve as a UE-to-Network relay of a second layer/a third layer of the 5G ProSe layer, a far end UE, supports a terminal direct discovery function based on a PC5 interface, and three direct communication capabilities of unicast, broadcast and group level communication, and simultaneously supports a single-hop relay from the terminal to the Network and a path selection strategy based on the PC5 interface/Uu interface.
However, the existing 5G TSN protocol cannot be directly applied to terminal devices for implementing direct communication based on a 3GPP communication system, so that transmission of time synchronization service data and delay sensitive data cannot be implemented between terminal devices for implementing direct communication based on the 3GPP communication system.
Based on the above, the present invention provides a method and system for transmitting delay-sensitive network data, so as to solve the above-mentioned problems.
Referring to fig. 2, fig. 2 is a flow chart of a transmission method of delay-sensitive network data provided by the present invention, in this embodiment, the transmission method of delay-sensitive network data is applied to a network PCF, and includes steps S210 to S260, where the steps are specifically as follows:
s210: and receiving the capability information sent by the UE.
The UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information.
The current 5G v2x/5G ProSe defines some non-3 GPP standardized end-to-end application services, so that the 3GPP communication system supports part of the basic end-to-end services, such as relative positioning services, time synchronization services, deterministic transmission services, etc., which are commonly implemented in the 3GPP communication system based on the data plane of the 3GPP PC5 interface.
If the UE has the direct connection time synchronous transmission capability based on the PC5 interface and the time delay sensitive data transmission capability based on the PC5 interface, when the UE performs network registration, corresponding direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information are sent to a network side.
Specifically, when the UE initiates network registration to the 3GPP core network, the corresponding capability information is sent to the network side, so that the PCF at the network side can receive the capability information sent by the UE, and learn whether the UE has time synchronization transmission capability and delay sensitive data transmission capability based on the capability information sent by the UE.
S220: and receiving strategy information sent by the TSN AF.
Specifically, the TSN AF may obtain policy information through OAM and send the policy information to the PCF.
The policy information includes related information such as QoS index of end-to-end time synchronization service and deterministic transmission service, flow characteristic of data flow, scheduling policy information, etc. acquired by TSN AF through OAM.
S230: and receiving the UE subscription information sent by the UDM.
The method comprises the steps that when the UE with time synchronous transmission capability and time delay sensitive data transmission capability performs network registration, UE subscription information corresponding to the UE is stored in the UDM, wherein the UE subscription information comprises subscription information related to the UE serving as an end-to-end deterministic network, subscription information related to the UE authorized to support the end-to-end deterministic network, subscription information such as a service range allowed by the UE and the like.
Specifically, the network side PCF may receive UE subscription information sent by the UDM.
S240: and generating V2X strategy information and/or ProSe strategy information for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the capability information sent by the UE, the strategy information sent by the TSN AF and the UE subscription information.
Specifically, the network side PCF may determine, based on capability information sent by the UE, policy information sent by the TSN AF, and UE subscription information, UEs capable of supporting the direct-connection time synchronization service and the direct-connection deterministic transmission service, and generate V2X policy information and/or ProSe policy information for the UEs capable of supporting the direct-connection time synchronization service and the direct-connection deterministic transmission service.
The time synchronization service is used for ensuring the clock consistency of all the devices, ensuring the correct matching of the transmission time slots of the data in each device, and meeting the requirements of end-to-end deterministic time delay and queuing-free transmission. Deterministic transmission services generally refer to a technology for guaranteeing service quality (such as delay upper bound, delay jitter, etc.) related to end-to-end transmission delay of a service flow, and meet requirements of end-to-end transmission delay and jitter of the service flow in an uncertain network environment.
S250: and configuring V2X strategy and/or ProSe strategy for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the V2X strategy information and/or ProSe strategy information.
Referring to fig. 3, fig. 3 is a signaling diagram of a V2X/ProSe policy configuration flow provided in the present invention.
Specifically, as shown in fig. 3, the V2X/ProSe policy configuration flow is as follows:
the first step: and the UE reports the capability information.
When the UE with time synchronous transmission capability and time delay sensitive data transmission capability performs network registration, reporting capability information of the UE to an AMF/UDM of a network side; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information.
Specifically, the UE may send Registration Request message to the AMF at the network side, where Registration Request message includes capability information of the UE; after receiving the Registration Request message sent by the UE, the AMF generates a nudm_uecm_registration message, and sends the generated nudm_uecm_registration message to the UDM, where the nudm_uecm_registration message includes capability information of the UE. The AMF/UDM stores the capability information of the UE.
The UDM also needs to store UE subscription information corresponding to the UE while the UE performs network registration, where the UE subscription information includes subscription information related to the UE as an end-to-end deterministic network, related information of the UE authorized as a supporting end-to-end deterministic network, and subscription information such as a service range allowed by the UE.
The network side PCF may obtain capability information, UE subscription information, and context information of the UE from the UDM.
And a second step of: the TSN AF provides policy information.
Specifically, the TSN AF may obtain policy information through OAM and send the policy information to the PCF.
The policy information includes related information such as QoS index of end-to-end time synchronization service and deterministic transmission service, flow characteristic of data flow, scheduling policy information, etc. acquired by TSN AF through OAM.
And a third step of: V2X policy information and/or ProSe policy information is generated.
The network PCF generates V2X strategy information and/or ProSe strategy information for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the capability information sent by the UE, the strategy information sent by the TSN AF and the UE subscription information.
The data required by the V2X policy information includes a PC5QoS parameter of a direct connection time synchronization service based on 5g V2X, a PC5QoS parameter of a direct connection deterministic transmission service based on 5g V2X, a PLMN providing V2X service, an access network providing V2X service, frequency information, geographical area policy information, a radio access type of the direct connection time synchronization service, a radio access type of the direct connection deterministic transmission service, a radio parameter (e.g., available spectrum, available geographical area, etc.), a service range, configuration information (e.g., default Layer2 ID or discovery mode) for discovery, a scheduling policy of deterministic data flows, etc.
The data required for ProSe policy information includes PC5 QoS parameters of a direct connection time synchronization service based on 5G ProSe, PC5 QoS parameters of a direct connection deterministic transmission service based on 5G ProSe, PLMNs providing ProSe services, access networks providing ProSe services, frequency information, geographical area policy information, radio access type of a direct connection time synchronization service, radio access type of a direct connection deterministic transmission service, radio parameters (e.g., available spectrum, available geographical area, etc.), service scope, configuration information (e.g., default Layer2 ID or discovery pattern) for discovery, scheduling policy of deterministic data flows, etc.
And configuring a V2X strategy and/or a ProSe strategy for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the V2X strategy information and/or the ProSe strategy information, and realizing end-to-end deterministic communication.
Fourth step: the PCF sends V2X policy and/or ProSe policy to the UE.
Specifically, the PCF sends the generated or updated V2X policy and/or ProSe policy to the AMF via MANAGE UE POLICY COMMAND messages in namf_communication_n1n2messagetransfer service operation.
The AMF generates a corresponding DL NAS TRANSPORT message and sends the DL NAS TRANSPORT message to the UE. Wherein the DL NAS TRANSPORT message is generated based on MANAGE UE POLICY COMMAND message container ， Carrying V2X policies and/or ProSe policies generated or updated by the PCF.
Fifth step: and the UE returns a response message to complete the configuration of the V2X strategy and/or the ProSe strategy.
After receiving and storing the V2X policy and/or the ProSe policy, the UE returns a response message to the PCF to complete the configuration of the V2X policy and/or the ProSe policy.
Specifically, the UE returns MANAGE UE POLICY COMPLETE a response message to the AMF. After receiving the MANAGE UE POLICY COMPLETE response message, the AMF generates a corresponding Namf_communication_N1message notification response message based on the MANAGE UE POLICY COMPLETE message container, and returns the Namf_communication_N1message notification response message to the PCF to complete the V2X policy and/or ProSe policy configuration.
S260: and transmitting the V2X strategy and/or the ProSe strategy to the initial UE so that the initial UE establishes an end-to-end direct connection data surface link with the target UE based on the V2X strategy and/or the ProSe strategy.
Wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data.
The PCF sends a V2X policy and/or a ProSe policy to the initial UE so that the initial UE establishes an end-to-end direct data plane link with the target UE based on the V2X policy and/or the ProSe policy.
Further, when time synchronization service data and/or deterministic transmission service data are required to be transmitted between an initial UE and a target UE in the 3GPP communication system, and the time synchronization service and/or deterministic transmission service between the initial UE and the target UE are required to be based on PC5 data plane connection, the initial UE may establish an end-to-end direct data plane link with the target UE based on the received V2X policy and/or ProSe policy, so as to realize transmission of the time synchronization service data and/or deterministic transmission service data.
According to the method for transmitting the delay-sensitive network data, the 3GPP communication system has the capability of communicating with the end-to-end direct communication standard based on V2X and/or ProSe, so that V2X strategy information and/or ProSe strategy information for direct-connection time synchronization service and direct-connection deterministic transmission service can be generated for the UE, then the V2X strategy and/or ProSe strategy information for direct-connection time synchronization service and direct-connection deterministic transmission service is configured for the UE based on the V2X strategy and/or the ProSe strategy information, an end-to-end direct-connection data plane link between the UE based on the generated V2X strategy and/or the ProSe strategy for direct-connection communication can be established between the UE based on the 3GPP communication system, and time synchronization service data and/or deterministic transmission service data can be transmitted between the terminal equipment for realizing direct-connection communication based on the 3GPP communication system.
In some embodiments, before sending the V2X policy and/or ProSe policy to the initial UE, comprising: and determining data required by the V2X policy information based on the direct connection time synchronization service type policy information and the direct connection deterministic transmission service type policy information in the V2X application, and/or determining data required by the ProSe policy information based on the direct connection time synchronization service type policy information and the direct connection deterministic transmission service type policy information in the ProSe application.
In V2X and/or ProSe applications, specific service types for implementing clock synchronization services and standardized service types for implementing deterministic transport services may be defined. For the two special service types, the PCF of the operator can define corresponding V2X strategy information and ProSe strategy information, and the strategy information defines data required by the corresponding direct connection time synchronization service type and the direct connection deterministic transmission service to establish an end-to-end direct connection data plane link through a data plane of V2X/ProSe.
Specifically, the data required by the V2X policy information includes a PC5 QoS parameter of a direct connection time synchronization service based on 5g V2X, a PC5 QoS parameter of a direct connection deterministic transmission service based on 5g V2X, a PLMN providing V2X service, an access network providing V2X service, frequency information, geographic area policy information, a radio access type of the direct connection time synchronization service, a radio access type of the direct connection deterministic transmission service, a radio parameter, a service range, configuration information for discovery search, and a scheduling policy of deterministic data flows.
The data required by ProSe policy information includes PC5 QoS parameters of a direct connection time synchronization service based on 5G ProSe, PC5 QoS parameters of a direct connection deterministic transmission service based on 5G ProSe, PLMNs providing ProSe services, access networks providing ProSe services, frequency information, geographical area policy information, radio access type of the direct connection time synchronization service, radio access type of the direct connection deterministic transmission service, radio parameters, service scope, configuration information for exploring discovery, scheduling policy of deterministic data flows.
By the method, the time synchronization service data and the deterministic transmission service data can be processed as standardized 3GPP V2X/ProSe application data, so that the transmission of the time synchronization service data and the time delay sensitive data can be carried out between terminal equipment for realizing direct communication based on a 3GPP communication system.
In some embodiments, the policy information sent by the TSN AF includes QoS metrics of the end-to-end time synchronization service and deterministic transmission service, traffic characteristics of the data flows, scheduling policy information.
The QoS indexes of the end-to-end time synchronization service and the deterministic transmission service comprise the transmission budget of direct-connection time synchronization transmission and the transmission budget of direct-connection delay sensitive data.
Referring to fig. 4, fig. 4 is a second flowchart of a transmission method of delay-sensitive network data provided by the present invention, in this embodiment, the transmission method of delay-sensitive network data is applied to a UE, and includes steps S410 to S440, where each step is specifically as follows:
s410: and when the network registration is carried out, sending the capability information to the network side.
The UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information.
S420: based on the V2X policy information, determining V2X policies for the direct time synchronization service and the direct deterministic transmission service, and/or based on the ProSe policy information, determining ProSe policies for the direct time synchronization service and the direct deterministic transmission service.
S430: and receiving the V2X strategy and/or the ProSe strategy sent by the PCF at the network side.
S440: when the initial UE sends a direct connection time synchronization service request and/or a direct connection deterministic transmission service request to the target UE, the initial UE establishes an end-to-end direct connection data plane link with the target UE based on a V2X policy and/or a ProSe policy.
Wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data.
In some embodiments, before the initial UE sends the direct time synchronization service request and/or the direct deterministic transmission service request to the target UE, comprising: determining direct time synchronization service type policy information and direct deterministic transmission service type policy information in the V2X application and/or determining direct time synchronization service type policy information and direct deterministic transmission service type policy information in the ProSe application.
It will be appreciated that in V2X and/or ProSe applications, specific service types for implementing clock synchronization services and standardized service types for implementing deterministic transport services may be defined. Before the initial UE sends the direct-connection time synchronization service request and/or the direct-connection deterministic transmission service request to the target UE, direct-connection time synchronization service type policy information and direct-connection deterministic transmission service type policy information may be defined in the V2X application and/or direct-connection time synchronization service type policy information and direct-connection deterministic transmission service type policy information may be defined in the ProSe application.
The direct connection time synchronization service type policy information and the direct connection deterministic transmission service type policy information determined in the V2X application include a PC5QoS parameter of a direct connection time synchronization service based on 5g V2X, a PC5QoS parameter of a direct connection deterministic transmission service based on 5g V2X, a PLMN providing V2X service, an access network providing V2X service, allowed frequency information, and geographic area policy information.
The direct time synchronization service type policy information and the direct deterministic transmission service type policy information determined in the ProSe application include PC5 QoS parameters of a direct time synchronization service based on 5G ProSe, PC5 QoS parameters of a direct deterministic transmission service based on 5G ProSe, PLMNs providing ProSe services, access networks providing ProSe services, allowed frequency information, geographical area policy information.
In some embodiments, the initial UE establishes an end-to-end direct data plane link with the target UE based on the V2X policy and/or ProSe policy, comprising: the initial UE sends a direct link establishment request to the target UE based on a V2X strategy and/or a ProSe strategy; the direct link establishment request comprises QoS information of a direct link, service type information and Layer2 ID identification information of the direct link; responding to a response message corresponding to a direct link establishment request returned by the target UE, and completing the establishment of an end-to-end direct data surface link between the target UE and the target UE; the response message includes QoS information, service type information, and security parameters of the direct link.
Referring to fig. 5, fig. 5 is a flow signaling diagram for establishing an end-to-end direct data plane link according to the present invention.
Specifically, the establishment flow of the end-to-end direct data plane link is as follows:
the first step: the initial UE triggers the establishment of a direct link.
Specifically, the initial UE initiates a time synchronization service request and/or a direct connection deterministic transmission service request, triggers an end-to-end direct connection data plane link establishment.
And a second step of: the initial UE sends a request to establish a direct link.
Specifically, the initial UE sends a direct link establishment request or a direct link modification request based on the 5g PC5 interface to the target UE based on the V2X policy and/or ProSe policy.
The direct link establishment request or the direct link modification request comprises QoS information, service type information and Layer2 ID identification information of the direct link.
And a third step of: the target UE responds to the request to establish the direct link.
Specifically, the target UE responds to the direct link establishment request or the direct link modification request, and returns a response message corresponding to the direct link establishment request or the direct link modification request, so as to complete the establishment of the end-to-end direct data plane link with the target UE.
The response message includes QoS information, service type information, security parameters, and the like of the direct link.
Fourth step: and (5) data transmission.
The initial UE and the target UE transmit time synchronization service data and/or deterministic transmission service data based on the established PC5 interface based end-to-end direct data plane link.
In some embodiments, after the initial UE establishes an end-to-end direct data plane link with the target UE based on the V2X policy and/or ProSe policy, further comprising: based on the end-to-end direct data plane link, time synchronization service data between the initial UE and the target UE is transmitted through a time synchronization protocol.
In particular, with an end-to-end direct data plane link based on a PC5 interface, time synchronization service data between an initial UE and a target UE may be transmitted through a time synchronization protocol defined by IEEE Std 802.1 AS.
Based on the end-to-end direct data plane link, the deterministic transmission service data between the initial UE and the target UE is transmitted through a scheduling policy.
Specifically, with the end-to-end direct data plane link based on the PC5 interface, deterministic transmission service data between the initial UE and the target UE may schedule the PC5 user plane via a scheduling policy defined based on IEEE Std 802.1AS, so AS to implement transmission of deterministic transmission service data based on 5g v2x and/or ProSe.
The present invention also provides a network device, which in this embodiment may include a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor executes the program to realize the transmission method of the delay sensitive network data applied to the PCF at the network side.
Further, the logic instructions in the memory described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The invention also provides a terminal comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the transmission method of the time delay sensitive network data applied to the UE according to any one of the above when executing the program.
The invention also provides a transmission system of the delay-sensitive network data, and in the embodiment, the transmission system of the delay-sensitive network data comprises a network PCF and UE.
The network-side PCF is configured to: receiving capability information sent by UE; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information; receiving strategy information sent by TSN AF; receiving UE subscription information sent by a UDM; generating V2X strategy information and/or ProSe strategy information for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the capability information sent by the UE, the strategy information sent by the TSN AF and the UE subscription information; configuring a V2X policy and/or a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service for the UE based on the V2X policy information and/or the ProSe policy information; transmitting a V2X policy and/or a ProSe policy to an initial UE, so that the initial UE establishes an end-to-end direct connection data plane link with a target UE based on the V2X policy and/or the ProSe policy; wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data.
The UE is configured to: when network registration is carried out, capability information is sent to a network PCF (physical function); determining a V2X policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the V2X policy information, and/or determining a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the ProSe policy information; receiving a V2X strategy and/or a ProSe strategy sent by a PCF at a network side; when the initial UE sends a direct connection time synchronization service request and/or a direct connection deterministic transmission service request to the target UE, the initial UE establishes an end-to-end direct connection data plane link with the target UE based on a V2X policy and/or a ProSe policy.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for transmitting delay-sensitive network data, applied to a network-side PCF, comprising:
receiving capability information sent by UE; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information;
receiving strategy information sent by TSN AF;
receiving UE subscription information sent by a UDM;
generating V2X policy information and/or ProSe policy information for a direct connection time synchronization service and a direct connection deterministic transmission service for the UE based on capability information sent by the UE, policy information sent by the TSN AF and the UE subscription information;
configuring a V2X policy and/or a ProSe policy for a direct connection time synchronization service and a direct connection deterministic transmission service for the UE based on the V2X policy information and/or the ProSe policy information;
transmitting the V2X policy and/or the ProSe policy to the initial UE so that the initial UE establishes an end-to-end direct connection data plane link with the target UE based on the V2X policy and/or the ProSe policy; wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data.
2. The method for transmitting delay-sensitive network data according to claim 1, characterized in that before said transmitting the V2X policy and/or the ProSe policy to the initial UE, it comprises:
determining data required by the V2X policy information based on the direct connection time synchronization service type policy information and the direct connection deterministic transmission service type policy information in the V2X application, and/or determining data required by the ProSe policy information based on the direct connection time synchronization service type policy information and the direct connection deterministic transmission service type policy information in the ProSe application;
the data required by the V2X policy information includes a PC5QoS parameter of a direct connection time synchronization service based on 5g V2X, a PC5QoS parameter of a direct connection deterministic transmission service based on 5g V2X, a PLMN providing V2X service, an access network providing V2X service, frequency information, geographic area policy information, a wireless access type of the direct connection time synchronization service, a wireless access type of the direct connection deterministic transmission service, a wireless parameter, a service range, configuration information for discovery, and a scheduling policy of deterministic data flows;
the data required by the ProSe policy information comprises a PC5QoS parameter of a direct connection time synchronization service based on 5G ProSe, a PC5QoS parameter of a direct connection deterministic transmission service based on 5G ProSe, a PLMN providing ProSe service, an access network providing ProSe service, frequency information, geographic area policy information, a wireless access type of the direct connection time synchronization service, a wireless access type of the direct connection deterministic transmission service, a wireless parameter, a service range, configuration information for exploring discovery, and a scheduling policy of deterministic data flows.
3. The method for transmitting delay-sensitive network data according to claim 1, wherein the policy information sent by the TSN AF includes QoS indicators of end-to-end time synchronization service and deterministic transmission service, traffic characteristics of data flows, and scheduling policy information;
the QoS indexes of the end-to-end time synchronization service and the deterministic transmission service comprise the transmission budget of direct-connection time synchronization transmission and the transmission budget of direct-connection delay sensitive data.
4. A method for transmitting delay-sensitive network data, applied to a UE, comprising:
when network registration is carried out, capability information is sent to a network side; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information;
determining a V2X policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the V2X policy information, and/or determining a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the ProSe policy information;
receiving the V2X strategy and/or the ProSe strategy sent by a PCF at a network side;
when the initial UE sends a direct connection time synchronization service request and/or a direct connection deterministic transmission service request to the target UE, the initial UE establishes an end-to-end direct connection data plane link with the target UE based on the V2X strategy and/or the ProSe strategy; wherein the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data.
5. The method according to claim 4, wherein before the initial UE sends a direct time synchronization service request and/or a direct deterministic transmission service request to the target UE, comprising:
determining direct connection time synchronization service type policy information and direct connection deterministic transmission service type policy information in a V2X application and/or determining direct connection time synchronization service type policy information and direct connection deterministic transmission service type policy information in a ProSe application;
wherein the direct connection time synchronization service policy type information and the direct connection deterministic transmission service type policy information determined in the V2X application include a PC5QoS parameter of a direct connection time synchronization service based on 5g V2X, a PC5QoS parameter of a direct connection deterministic transmission service based on 5g V2X, a PLMN providing V2X service, an access network providing V2X service, allowed frequency information, geographical area policy information;
the direct time synchronization service type policy information and the direct deterministic transmission service type policy information determined in the ProSe application include PC5QoS parameters of a direct time synchronization service based on 5G ProSe, PC5QoS parameters of a direct deterministic transmission service based on 5G ProSe, PLMNs providing ProSe services, access networks providing ProSe services, allowed frequency information, geographical area policy information.
6. The method according to claim 4, wherein the initial UE establishes an end-to-end direct data plane link with the target UE based on the V2X policy and/or the ProSe policy, comprising:
the initial UE sends a direct link establishment request to the target UE based on the V2X strategy and/or the ProSe strategy; the direct link establishment request comprises QoS information of a direct link, service type information and Layer2 ID identification information of the direct link;
responding to a response message corresponding to the direct link establishment request returned by the target UE, and completing the establishment of an end-to-end direct data surface link between the target UE; the response message includes QoS information, service type information, and security parameters of the direct link.
7. The method according to claim 4, wherein after the initial UE establishes an end-to-end direct data plane link with the target UE based on the V2X policy and/or the ProSe policy, further comprising:
transmitting time synchronization service data between the initial UE and the target UE through a time synchronization protocol based on the end-to-end direct data plane link;
And transmitting the deterministic transmission service data between the initial UE and the target UE through a scheduling strategy based on the end-to-end direct data plane link.
8. A network device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements a method of transmission of delay-sensitive network data as claimed in any one of claims 1 to 3 when the program is executed by the processor.
9. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of transmission of delay-sensitive network data according to any one of claims 4 to 7 when executing the program.
10. A kind of transmission system of time delay sensitive network data, characterized by, including network PCF and UE;
the network-side PCF is configured to: receiving capability information sent by UE; the UE comprises an initial UE and a target UE, and the capability information comprises direct connection time synchronous transmission capability information and direct connection time delay sensitive data transmission capability information; receiving strategy information sent by TSN AF; receiving UE subscription information sent by a UDM; generating V2X policy information and/or ProSe policy information for a direct connection time synchronization service and a direct connection deterministic transmission service for the UE based on capability information sent by the UE, policy information sent by the TSN AF and the UE subscription information; configuring a V2X policy and/or a ProSe policy for a direct connection time synchronization service and a direct connection deterministic transmission service for the UE based on the V2X policy information and/or the ProSe policy information; transmitting the V2X policy and/or the ProSe policy to the initial UE so that the initial UE establishes an end-to-end direct connection data plane link with the target UE based on the V2X policy and/or the ProSe policy; the end-to-end direct data plane link is used for transmitting time synchronization service data and/or deterministic transmission service data;
The UE is configured to: when network registration is carried out, capability information is sent to a network side; determining a V2X policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the V2X policy information, and/or determining a ProSe policy for the direct connection time synchronization service and the direct connection deterministic transmission service based on the ProSe policy information; receiving the V2X strategy and/or the ProSe strategy sent by a PCF at a network side; when the initial UE sends a direct connection time synchronization service request and/or a direct connection deterministic transmission service request to the target UE, the initial UE establishes an end-to-end direct connection data plane link with the target UE based on the V2X policy and/or the ProSe policy.
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