阅读说明：本技术 网络节点执行的方法以及相应的网络节点 (The method and corresponding network node that network node executes ) 是由 王涛 于 2019-09-27 设计创作，主要内容包括：本公开提供了一种由网络节点执行的方法以及相应的网络节点。具体地,由访问-控制面网络节点执行的方法包括：向归属-控制面网络节点发送第一信息,其中所述第一信息指示所述访问-控制面网络节点支持的时间参数修改方式；以及从所述归属-控制面网络节点接收第二信息,其中所述第二信息指示所述访问-控制面网络节点将要使用的时间参数修改方式。(Present disclose provides a kind of method executed by network node and corresponding network nodes.It specifically, include: to send the first information to ownership-control plane network node from the method that access-control plane network node executes, wherein the first information indicates the time parameter modification mode that the access-control plane network node is supported；And the second information is received from the ownership-control plane network node, wherein second information indicates that access-control plane network node time parameter to be used modifies mode.)

1. a kind of method executed by access-control plane network node, comprising:

The first information is sent to ownership-control plane network node, wherein the first information indicates the access-control torus network The time parameter method of determination that node is supported；And

The second information is received from the ownership-control plane network node, wherein second information indicates the access-control plane Network node time parameter method of determination to be used.

2. the method as described in claim 1, further includes:

According to access-user's torus network node to the measurement capability of the time difference between the system clock of heterogeneous networks, institute is generated State the first information.

3. method according to claim 2, further includes:

Solicited message is sent to the access-user's torus network node, wherein the solicited message is for requesting the access-use The measurement capability of time difference between its system clock to heterogeneous networks of family torus network node feeding back；And

Response message is received from the access-user's torus network node, wherein the response message indicates the access-user face Measurement capability of the network node to the time difference between the system clock of heterogeneous networks.

4. method as described in any one of claims 1 to 3, wherein when second information indicates the access-control veil Network node by time parameter method of determination to be used be the first method of determination when, the method also includes:

First time parameter is received from the ownership-control plane network node, wherein the first time parameter is based on described The time parameter of ownership-control plane network node belonging network system clock；And

The second time parameter is determined according at least to the first time parameter, wherein second time parameter is based on the visit Ask-the time parameter of the system clock of control plane network node belonging network.

5. method as claimed in claim 4, wherein described determine the second time parameter according at least to the first time parameter Include:

According to the first time parameter and the ownership-control plane network node belonging network system clock with it is described Time difference between access-control plane network node belonging network system clock, determine the second time parameter.

6. method as described in any one of claims 1 to 3, wherein when second information indicates the access-control veil Network node by time parameter method of determination to be used be the second method of determination when, the method also includes:

The second time parameter is received from the ownership-control plane network node, wherein second time parameter is based on described The time parameter of access-control plane network node belonging network system clock.

7. method as described in any one of claims 1 to 3, wherein when second information indicates the access-control veil Network node by time parameter method of determination to be used be third method of determination when, the method also includes:

Third time parameter is received from the ownership-control plane network node, wherein the third time parameter is based on described The time parameter of the system clock of ownership-control plane network node belonging network external network；And

The second time parameter is determined according at least to the third time parameter, wherein second time parameter is based on the visit Ask-the time parameter of the system clock of control plane network node belonging network.

8. the method for claim 7, wherein described determine the second time parameter according at least to the third time parameter Include:

According to the system of the third time parameter and the ownership-control plane network node belonging network external network Time difference between clock and the access-control plane network node belonging network system clock, determine the second time parameter.

9. method according to claim 2, the wherein agreement of roams home of the method based on time-sensitive network communication Data cell session, the access-user's torus network node disjoint is in the association for the roams home for participating in time-sensitive network communication Discuss user's torus network node of data cell session.

10. a kind of method executed by ownership-control plane network node, comprising:

The first information is received from access-control plane network node, wherein the first information indicates the access-control torus network The time parameter method of determination that node is supported；And

The second information is sent to the access-control plane network node, wherein second information indicates the access-control plane Network node time parameter method of determination to be used.

11. method as claimed in claim 10, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the first method of determination, the method also includes:

First time parameter is sent to the access-control plane network node, wherein the first time parameter is based on described The time parameter of ownership-control plane network node belonging network system clock.

12. method as claimed in claim 10, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is third method of determination, the method also includes:

Third time parameter is sent to the access-control plane network node, wherein the third time parameter is based on described The time parameter of the system clock of ownership-control plane network node belonging network external network.

13. a kind of access-control plane network node, comprising:

Transmission unit is configured as sending the first information to ownership-control plane network node, wherein the first information indicates institute State the time parameter method of determination that access-control plane network node is supported；And

Receiving unit is configured as receiving the second information from the ownership-control plane network node, wherein second information refers to Show the access-control plane network node time parameter method of determination to be used.

14. a kind of ownership-control plane network node, comprising:

Receiving unit is configured as receiving the first information from access-control plane network node, wherein the first information indicates institute State the time parameter method of determination that access-control plane network node is supported；And

Transmission unit is configured as sending the second information to the access-control plane network node, wherein second information refers to Show the access-control plane network node time parameter method of determination to be used.

15. a kind of access-control plane network node, comprising:

Processor；And

Memory, wherein computer executable program is stored in the memory, when by the processor execution calculating When machine executable program, perform claim requires method described in any one of 1-11.

Technical field

This disclosure relates to wireless communication field, and relate more specifically to a kind of method and phase executed by network node The network node answered.

Background technique

Relative to traditional communication system, biggish change is had occurred in the core net framework of 5G communication system.Specifically, it passes Mobility management entity (Mobility Management Entity, MME) in the core net for communication system of uniting is flat by control Face function (Control Plane Function, CPF) entity substitution, for example, its function is broken down into access and mobility pipe Manage function (Access and Mobilitymanagement Function, AMF) entity and conversation management functional (Session Management Function, SMF) entity.In addition, gateway (the Serving in the core net of legacy communications system GateWay, SGW) and PDN Gateway (PDNGateWay, PGW) by user-plane function (User Plane Function, UPF) Entity substitution.

In addition, 5G communication system introduces in time-sensitive network (Time Sensitive Networking, TSN) Time-sensitive communicates (Time Sensitive Communication, TSC), to support to the higher industry of time required precision Automated manufacturing application.In order to enable the Radio Access Network (Radio Access Network, RAN) of 5G carries out data stream Accurate time control, the business that SMF entity can be provided according to application function (Application Function, AF) entity Information generates TSC auxiliary information (TSC Assistance Information, TSCAI), and provides it to RAN, so that RAN Accurate time control can be carried out to data stream according to TSCAI.

In the protocol Data Unit of the roams home (Home Routed Roaming) of time-sensitive network communication In (Protocol Data Unit, PDU) session (Session), in terminal roaming and H-SMF (Home-SMF, A SMF in The HPLMN (Home Public Land Mobile Network, home public land mobile network)) and V-SMF ((Visited Public Land Mobile Network, accesses public land to Visited-SMF, A SMF in the VPLMN Ground mobile network)) in the scene of time synchronization, the business information that H-SMF can be provided according to AF entity generates TSCAI, and by institute The TSCAI of generation is supplied to V-SMF, and then the TSCAI is supplied to RAN by V-SMF, so as to RAN according to the TSCAI to data flow Carry out accurate time control.

However, V-SMF and H-SMF are likely to be out of synchronization in time.For example, VPLMN and HPLMN is in time-domain, there are the times Poor (for example, time zone is different), or time drift is caused using different master clocks in same time zone.In this feelings Under shape, V-SMF be supplied to as procedure described above RAN TSCAI be it is inaccurate, data stream can not be carried out so as to cause RAN Accurate time control.

Summary of the invention

In order to overcome defect existing in the prior art, the present disclosure proposes it is a kind of by network node execute method and Corresponding network node.

According to one aspect of the disclosure, a kind of method executed by access-control plane network node is provided, comprising: The first information is sent to ownership-control plane network node, wherein the first information indicates the access-control plane network node The time parameter method of determination of support；And the second information is received from the ownership-control plane network node, wherein described second Information indicates access-control plane network node time parameter method of determination to be used.

According to the disclosure example, the above method further include: according to access-user's torus network node to heterogeneous networks System clock between time difference measurement capability, generate the first information.

According to the disclosure example, the above method further include: send request to the access-user's torus network node Information, wherein the solicited message be used to requesting the access-user's torus network node feeding back its to the systems of heterogeneous networks when The measurement capability of time difference between clock；And response message is received from the access-user's torus network node, wherein the sound Information is answered to indicate the access-user's torus network node to the measurement capability of the time difference between the system clock of heterogeneous networks.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the first method of determination, the method also includes: from the ownership-control torus network Node receives first time parameter, wherein the first time parameter is based on the ownership-affiliated net of control plane network node The time parameter of the system clock of network；And the second time parameter is determined according at least to the first time parameter, wherein described Second time parameter is the time parameter based on the access-control plane network node belonging network system clock.

According to the disclosure example, wherein described determine the second time parameter according at least to the first time parameter Include: according to the first time parameter and the ownership-control plane network node belonging network system clock with it is described Time difference between access-control plane network node belonging network system clock, determine the second time parameter.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the second method of determination, the method also includes: from the ownership-control torus network Node receives the second time parameter, wherein second time parameter is based on the access-affiliated net of control plane network node The time parameter of the system clock of network.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is third method of determination, the method also includes: from the ownership-control torus network Node receives third time parameter, wherein the third time parameter is based on the ownership-affiliated net of control plane network node The time parameter of the system clock of the external network of network；And determine that the second time joined according at least to the third time parameter Number, wherein second time parameter is the time based on the access-control plane network node belonging network system clock Parameter.

According to the disclosure example, wherein described determine the second time parameter according at least to the third time parameter It include: the system according to the third time parameter and the ownership-control plane network node belonging network external network Time difference between clock and the access-control plane network node belonging network system clock, determine the second time parameter.

According to the disclosure example, the protocol data of roams home of the above method based on time-sensitive network communication Unit session.

According to the disclosure example, wherein the access-user's torus network node disjoint is in participation time-sensitive net User's torus network node of the protocol Data Unit session of the roams home of network communication.

According to the disclosure example, wherein the access-user's torus network node is to participate in time-sensitive network to lead to User's torus network node of the protocol Data Unit session of the roams home of letter.

According to another aspect of the present disclosure, a kind of method executed by ownership-control plane network node is provided, comprising: The first information is received from access-control plane network node, wherein the first information indicates the access-control plane network node The time parameter method of determination of support；And the second information is sent to the access-control plane network node, wherein described second Information indicates access-control plane network node time parameter method of determination to be used.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the first method of determination, the method also includes: to the access-control torus network Node sends first time parameter, wherein the first time parameter is based on the ownership-affiliated net of control plane network node The time parameter of the system clock of network.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the second method of determination, the method also includes: to the access-control torus network Node sends the second time parameter, wherein second time parameter is based on the access-affiliated net of control plane network node The time parameter of the system clock of network.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is third method of determination, the method also includes: to the access-control torus network Node sends third time parameter, wherein the third time parameter is based on the ownership-affiliated net of control plane network node The time parameter of the system clock of the external network of network.

According to another aspect of the present disclosure, a kind of access-control plane network node is provided, comprising: transmission unit is matched It is set to ownership-control plane network node and sends the first information, wherein the first information indicates the access-control torus network The time parameter method of determination that node is supported；And receiving unit, it is configured as receiving from the ownership-control plane network node Second information, wherein second information indicates the access-control plane network node time parameter determination side to be used Formula.

According to the disclosure example, further includes: processing unit is configured as according to access-user's torus network node To the measurement capability of the time difference between the system clock of heterogeneous networks, the first information is generated.

According to the disclosure example, wherein the transmission unit is additionally configured to the access-user's torus network Node send solicited message, wherein the solicited message for request the access-user's torus network node feeding back its to difference The measurement capability of time difference between the system clock of network；And the receiving unit is additionally configured to from the access-use Family torus network node receives response message, wherein the response message indicates access-user's torus network node to different nets The measurement capability of time difference between the system clock of network.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the first method of determination, the receiving unit is additionally configured to from the ownership-control Torus network node processed receives first time parameter, wherein the first time parameter is based on the ownership-control torus network section The time parameter of the system clock of point belonging network；And the processing unit was additionally configured to according at least to the first time Parameter determines the second time parameter, wherein second time parameter is based on the access-affiliated net of control plane network node The time parameter of the system clock of network.

According to the disclosure example, the processing unit is configured as according to the first time parameter, Yi Jisuo Ownership-control plane network node belonging network system clock, which is stated, with the access-control plane network node belonging network is Time difference between system clock, determine the second time parameter.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the second method of determination, the receiving unit is additionally configured to from the ownership-control Torus network node processed receives the second time parameter, wherein second time parameter is based on the access-control torus network section The time parameter of the system clock of point belonging network.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is third method of determination, the receiving unit is additionally configured to from the ownership-control Torus network node processed receives third time parameter, wherein the third time parameter is based on the ownership-control torus network section The time parameter of the system clock of the external network of point belonging network；And the processing unit is additionally configured to according at least to institute It states third time parameter and determines the second time parameter, wherein second time parameter is based on the access-control torus network The time parameter of the system clock of node belonging network.

According to the disclosure example, wherein the processing unit be configured as according to the third time parameter, with And the system clock of the ownership-control plane network node belonging network external network and the access-control torus network section Time difference between the system clock of point belonging network, determine the second time parameter.

According to the disclosure example, the above-mentioned method executed by access-control plane network node is based on time-sensitive The protocol Data Unit session of the roams home of network communication.

According to the disclosure example, wherein the access-user's torus network node disjoint is in participation time-sensitive net User's torus network node of the protocol Data Unit session of the roams home of network communication.

According to the disclosure example, wherein the access-user's torus network node is to participate in time-sensitive network to lead to User's torus network node of the protocol Data Unit session of the roams home of letter.

According to another aspect of the present disclosure, a kind of ownership-control plane network node is provided, comprising: receiving unit is matched It is set to from access-control plane network node and receives the first information, wherein the first information indicates the access-control torus network The time parameter method of determination that node is supported；And transmission unit, it is configured as sending to the access-control plane network node Second information, wherein second information indicates the access-control plane network node time parameter determination side to be used Formula.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the first method of determination, the transmission unit is additionally configured to the access-control Torus network node processed sends first time parameter, wherein the first time parameter is based on the ownership-control torus network section The time parameter of the system clock of point belonging network.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is the second method of determination, the transmission unit is additionally configured to the access-control Torus network node processed sends the second time parameter, wherein second time parameter is based on the access-control torus network section The time parameter of the system clock of point belonging network.

According to the disclosure example, wherein when second information indicates the access-control plane network node When time parameter method of determination to be used is third method of determination, the transmission unit is additionally configured to the access-control Torus network node processed sends third time parameter, wherein the third time parameter is based on the ownership-control torus network section The time parameter of the system clock of the external network of point belonging network.

According to another aspect of the present disclosure, a kind of access-control plane network node is provided, comprising: processor；And it deposits Reservoir, wherein be stored with computer executable program in the memory, can be held when executing the computer by the processor When line program, the above method is executed.

According to another aspect of the present disclosure, a kind of ownership-control plane network node is provided, comprising: processor；And it deposits Reservoir, wherein be stored with computer executable program in the memory, can be held when executing the computer by the processor When line program, the above method is executed.

According to another aspect of the present disclosure, a kind of computer readable storage medium is provided, instruction is stored thereon with, it is described Instruction is when being executed by processor, so that the processor executes the above method.

According to the method for the above-mentioned various aspects of the disclosure executed by access-control plane network node, by ownership-control plane The method and corresponding access-control plane network node, ownership-control plane network node, computer that network node executes can Storage medium is read, access-control plane network node can be used to indicate itself and be supported to ownership-control plane network node transmission Time parameter method of determination information, and be used to indicate access-control torus network section from the reception of ownership-control plane network node The information of time parameter method of determination to be used is controlled access-to realize by ownership-control plane network node by point Control plane network node time parameter method of determination to be used, so that when access-control plane network node is according to this Between parameter method of determination determine time parameter, to provide correct time parameter to RAN, avoid due to V-PLMN and H- Time difference between PLMN causes time drift using different master clocks in same time zone and causes in TSCAI " burst arrival time " inaccuracy.

Detailed description of the invention

The embodiment of the present disclosure is described in more detail in conjunction with the accompanying drawings, the above-mentioned and other purpose of the disclosure, Feature and advantage will be apparent.Attached drawing is used to provide to further understand the embodiment of the present disclosure, and constitutes explanation A part of book is used to explain the disclosure together with the embodiment of the present disclosure, does not constitute the limitation to the disclosure.In the accompanying drawings, Identical reference label typically represents same parts or step.

Fig. 1 is can be in the schematic diagram of the framework for the wireless time sensitive communication system for wherein applying embodiment of the disclosure.

Fig. 2 is the flow chart according to the method for the embodiment of the present disclosure executed by access-control plane network node.

Fig. 3 is to determine access-user's torus network node to not according to access-control plane network node of the embodiment of the present disclosure With the flow chart of the method for the measurement capability of the time difference between the system clock of network.

Fig. 4 is the flow chart according to the method for the embodiment of the present disclosure executed by ownership-control plane network node.

Fig. 5 is the schematic flow diagram for the method that wireless time sensitive communication system is realized according to the embodiment of the present disclosure.

Fig. 6 is that wireless time sensitive communication system realizes the first method of determination according to the embodiment of the present disclosure to determine the time The schematic flow diagram of parameter.

Fig. 7 is that wireless time sensitive communication system realizes the first method of determination according to the embodiment of the present disclosure to determine the time Another schematic flow diagram of parameter.

Fig. 8 is that wireless time sensitive communication system realizes the second method of determination according to the embodiment of the present disclosure to determine the time The schematic flow diagram of parameter.

Fig. 9 is that wireless time sensitive communication system realizes the second method of determination according to the embodiment of the present disclosure to determine the time Another schematic flow diagram of parameter.

Figure 10 is that wireless time sensitive communication system is realized according to the third method of determination of the embodiment of the present disclosure come when determining Between parameter schematic flow diagram.

Figure 11 is that wireless time sensitive communication system is realized according to the third method of determination of the embodiment of the present disclosure come when determining Between parameter another schematic flow diagram.

Figure 12 is access-control plane network node structural schematic diagram according to the embodiment of the present disclosure.

Figure 13 is ownership-control plane network node structural schematic diagram according to the embodiment of the present disclosure.

Figure 14 shows the framework of the equipment according to the embodiment of the present disclosure.

Specific embodiment

In order to enable the purposes, technical schemes and advantages of the disclosure become apparent, root is described in detail below with reference to accompanying drawings According to the example embodiment of the disclosure.In the accompanying drawings, identical reference label indicates identical element from beginning to end.It is understood that The embodiments described herein is merely illustrative, and is not necessarily to be construed as limiting the scope of the present disclosure.In addition, described here Terminal may include various types of user terminals (User Equipment, UE), such as mobile terminal or fixed terminal.For For the sake of convenient, UE and terminal is hereinafter sometimes interchangeably used.

Firstly, referring to Fig.1 come describe can be in the wireless time sensitive communication system for wherein applying embodiment of the disclosure Framework.The wireless time sensitive communication system communicates (for example, Home Routed Roaming) scene for terminal roaming Schematic architecture.The wireless time sensitive communication system may include home public land mobile network (Home Public Land Mobile Network, HPLMN) and access public land mobile network (Visited Public Land Mobile Network, VPLMN).Here HPLMN and/or VPLMN can be 5G communication system, be also possible to the nothing of any other type Line communication system, such as 6G communication system etc..Hereinafter, example is described implementation of the disclosure by taking 5G communication system as an example, but Other kinds of wireless communication system is readily applicable to it should be appreciated that being described below.In addition, the wireless time sensitive communication System can also include time-sensitive network data network (Time Sensitive Networking (TSN) Data Network (DN), TSN DN).

Specifically, as shown in Figure 1, wireless time sensitive communication system 100 includes UE 101, (wireless) access network ((Radio) Access Network, (R) AN) 102, access and mobile management function to ps domain (Access and Mobility Management Function, AMF) entity 103, V-SMF (Visited-SMF, A SMF in the VPLMN) (Session Management Function, conversation management functional) entity 104, V-UPF (Visited-UPF, A UPF in the VPLMN) (User Plane Function, user-plane function) entity 105, H-SMF (Home-SMF, A SMF in the HPLMN) entity 106, H-UPF (Home-UPF, AUPF in the HPLMN) entity 107, policy control functions (Policy Control Function, PCF) entity 108 and application function (Application Function, AF) entity 109, uniformly Data management (Unified Data Management, UDM) entity 110, business converter 111 corresponding with UE 101, terminal The corresponding business converter 113 of (end station) 112 and V-UPF entity 105 of standing, business corresponding with H-UPF entity 107 Converter 114, TSN DN 115 etc..Each entity as described herein can be one or more servers.In the disclosure, " entity " is referred to as node.For convenience, entity and node is hereinafter sometimes interchangeably used.

AMF entity 103 and V-SMF entity 104 as described herein belong to the control plane network node in VPLMN, can be with Referred to as access-control plane network node；V-UPF entity 105 belongs to user's torus network node in VPLMN, can be referred to as Access-user's torus network node.H-SMF entity 106 belongs to the control plane network node in HPLMN, can be referred to as ownership-control Torus network node processed；H-UPF entity 107 belongs to user's torus network node in HPLMN, can be referred to as ownership-user's veil Network node.

In the disclosure, (R) AN 102 can be the access network being made of base station.Here base station can be any class Base station or WiFi AP in the base station of type, such as the base station 5G or legacy communications system etc..In addition, AMF entity 103 can be with Support the access authentication of UE, mobile management, registration management, connection management, it is legal answer, support between transmission UE and SMF entity Session management information etc..V-SMF entity 104 is similar with H-SMF entity 106, can support session management etc., wherein the meeting Words management may include session establishment, modification and release.V-UPF entity 105 is similar with H-UPF entity 107, may have counting According to the routing function of packet, for example, data packet can be obtained from TSN DN 115, send data packet etc. to (R) AN 102.PCF is real Body 108 can support unified policy framework and control plane etc. to manage network behavior, provide policing rule to control.AF entity 109 can support to influence the application of service path, influence each other with the gage frame for policy control.UDM entity 110 It can support user identifier processing, based on access mandate (such as roaming limitation), the support service/session continuity for subscribing to data Deng.Business converter 111 corresponding with UE 101 can be time-sensitive business converter, such as equipment side TSN converter (Device-Side TSN Translator, DS-TT).DS-TT can support for eliminate shake holding and forwarding capability, Link layer connectivity discovery and report etc..Business converter 113 corresponding with V-UPF entity 105 and/or with H-UPF entity 107 Corresponding business converter 114 is also possible to time-sensitive business converter, such as network side TSN converter (NetWork- Side TSN Translator, NW-TT).NW-TT is similar with DS-TT, can also support the holding for eliminating shake and turn Send out function, link layer connectivity discovery and report etc..

In addition, UE 101 can be connected by Uu interface with (R) AN 102, it is connected by N1 interface with AMF entity 103. (R) AN 102 can be connected by N2 interface with AMF entity 103, be connected by N3 interface with V-UPF entity 105.V-UPF is real Body 105 can be connected by N4 interface with V-SMF entity 104, be connected by N9 interface with H-UPF entity 107.H-UPF entity 107 can be connected by N4 interface with H-SMF entity 106, be connected by N6 interface with TSN DN 115.V-SMF entity 104, H-SMF entity 106 can be connected by Nsmf, Npcf interface with PCF entity 108.PCF entity 108 can by Npcf interface, Nudm interface is connected with UDM entity 110.AF entity 109 can be connected by Naf, Nudm interface with UDM entity 110.3GPP mark Various interfaces mentioned herein have been defined in quasi- specification, therefore repeat no more.In addition, UE 101 can by DS-TT with Terminal station 112 communicates, and H-UPF entity 107 can be communicated by NW-TT with TSN DN 115.

In addition, in the example of fig. 1, NW-TT is integrated in UPF entity.However the present disclosure is not limited thereto.For example, NW- TT and UPF entity can be two independent equipment.

Embodiment of the disclosure can the roams home (Home Routed Roaming) based on time-sensitive network communication Protocol Data Unit (Protocol Data Unit, PDU) session (Session).It specifically, can be in time-sensitive network It carries out during the establishment process or modification of the protocol Data Unit session of the roams home of communication according to the embodiment of the present disclosure Method.For example, in the establishment process of the protocol Data Unit session of the roams home of time-sensitive network communication, access-control Torus network node (for example, V-SMF entity 104) processed can be sent out to ownership-control plane network node (for example, H-SMF entity 106) The information for being used to indicate the time parameter method of determination itself supported is sent, and is used for from ownership-control plane network node reception The information for indicating access-control plane network node time parameter method of determination to be used, to realize by ownership-control Torus network node controls access-control plane network node time parameter method of determination to be used, so that access-control Torus network node processed determines time parameter according to the time parameter method of determination, to mention to RAN (for example, (R) AN 102) For correct time parameter, avoids due to the time difference between V-PLMN and H-PLMN or used in same time zone Different master clocks causes time drift and leads to " burst arrival time " inaccuracy in TSCAI.

The side executed by access-control plane network node according to the embodiment of the present disclosure is described next, with reference to Fig. 2 Method.Fig. 2 is the flow chart according to the method 200 of the embodiment of the present disclosure executed by access-control plane network node.Such as Fig. 2 institute Show, in step s 201, access-control plane network node sends the first information to ownership-control plane network node, wherein described The first information indicates the time parameter method of determination that the access-control plane network node is supported.

In the disclosure, the time parameter method of determination that access-control plane network node is supported can have one or more. For example, access-the time parameter method of determination supported of control plane network node can there are three types of, respectively the first method of determination, Second method of determination and third method of determination.Specifically, the first method of determination be with can referring to access-control plane network node portion Time parameter is determined by ownership-control plane network node, the second method of determination can refer to that access-control plane network node is complete Time parameter is determined by ownership-control plane network node entirely, third method of determination can refer to access-control torus network section Point does not determine time parameter by ownership-control plane network node.This variety of method of determination can be adapted for different operations Quotient, to improve the popularity of application.

According to the first implementation of the disclosure, access-control plane network node can be according to access-user's torus network section Point (for example, V-UPF entity 105 in Fig. 1) generates institute to the measurement capability of the time difference between the system clock of heterogeneous networks State the first information.Specifically, access-control plane network node can determine access-user's torus network node to different nets first The measurement capability of time difference between the system clock of network.Then, access-control plane network node can be according to access-user Torus network node determines access-control plane network node to the measurement capability of the time difference between the system clock of heterogeneous networks The time parameter method of determination that can be supported.Then, access-control plane network node can be true according to identified time parameter Determine mode and generates the first information.

" time difference between the system clock of heterogeneous networks " as described herein may include TSN DN (for example, by UE Establish a data network title (Data Network when PDU (Protocol Data Unit, protocol Data Unit) session Name, DNN) the TSN DN that is connected) system clock and access-control plane network node belonging to network (i.e. VPLMN) The system clock and ownership-of network (i.e. VPLMN) belonging to time difference, access-control plane network node between system clock At least one of time difference between the system clock of network belonging to control plane network node (i.e. HPLMN) etc..

In the system clock and access-control veil that " time difference between the system clock of heterogeneous networks " includes TSN DN In the example of time difference between the system clock of network belonging to network node (i.e. VPLMN), access-control plane network node can To determine net belonging to system clock and access-control plane network node of the access-user's torus network node to TSN DN first The measurement capability of time difference between the system clock of network (i.e. VPLMN).When access-user's torus network node can measure TSN When time difference between the system clock of network (i.e. VPLMN) belonging to the system clock of DN and access-control plane network node, Access-control plane network node can not determine time parameter by ownership-control plane network node, therefore, access-control Torus network node can determine that access-control plane network node can support third method of determination.Then, access-control veil Network node can generate the first information according to third method of determination.

It include network belonging to access-control plane network node in " time difference between the system clock of heterogeneous networks " Between the system clock of network (i.e. HPLMN) belonging to system clock and ownership-the control plane network node of (i.e. VPLMN) when Between in poor example, access-control plane network node can determine access-user's torus network node to access-control plane first Network (i.e. HPLMN) belonging to the system clock and ownership-control plane network node of network belonging to network node (i.e. VPLMN) System clock between time difference measurement capability.When access-user's torus network node can measure access-control torus network The system clock of network belonging to node (i.e. VPLMN) is with network (i.e. HPLMN) belonging to ownership-control plane network node Unite clock between time difference when, access-control plane network node can be partially or even wholly by ownership-control torus network Node determines time parameter, and therefore, access-control plane network node can determine that access-control plane network node can prop up Hold the first method of determination and the second method of determination.Then, access-control plane network node can according to the first method of determination and/ Or second method of determination generate the first information.

In the system clock and access-control veil that " time difference between the system clock of heterogeneous networks " includes TSN DN Belonging to time difference and access-control plane network node between the system clock of network belonging to network node (i.e. VPLMN) Between the system clock of network (i.e. HPLMN) belonging to system clock and ownership-control plane network node of network (i.e. VPLMN) Time difference example in, access-control plane network node can determine access-user's torus network node to TSN DN's first Time difference, Yi Jifang between the system clock of network (i.e. VPLMN) belonging to system clock and access-control plane network node Ask-control plane network node belonging to network (i.e. VPLMN) system clock and ownership-control plane network node belonging to network The measurement capability of time difference between the system clock of (i.e. HPLMN).When access-user's torus network node can measure TSN DN System clock and access-control plane network node belonging to network (i.e. VPLMN) system clock between time difference, and Access-user's torus network node can measure the system clock of network (i.e. VPLMN) belonging to access-control plane network node with When time difference between the system clock of network (i.e. HPLMN) belonging to ownership-control plane network node, access-control veil Network node can not by or partly by or fully determine that by ownership-control plane network node, the time joins Number, therefore, access-control plane network node can determine that access-control plane network node can support the first method of determination, the Two methods of determination and third method of determination.Then, access-control plane network node can be according to the first method of determination, and/or Two methods of determination, and/or third method of determination generate the first information.

In the first implementation, access-control plane network node can determine access-by method shown in Fig. 3 Measurement capability of user's torus network node to the time difference between the system clock of heterogeneous networks.Fig. 3 is implemented according to the disclosure Access-control plane network node of example determines access-user's torus network node to the time between the system clock of heterogeneous networks The flow chart of the method 300 of the measurement capability of difference.

As shown in figure 3, access-control plane network node can be to access-user's torus network node hair in step S301 Send solicited message, wherein the solicited message can be used for requesting access to-user's torus network node is to access-control plane network node Feed back the measurement capability of the time difference between its system clock to heterogeneous networks.For example, the solicited message can be used for requesting Access-user's torus network node feeds back its system clock and access-control plane to TSN DN to access-control plane network node Net belonging to time difference, access-control plane network node between the system clock of network belonging to network node (i.e. VPLMN) Between the system clock of network (i.e. HPLMN) belonging to system clock and ownership-control plane network node of network (i.e. VPLMN) The measurement capability of at least one of time difference etc..

Then, in step s 302, access-control plane network node can be received from access-user's torus network node and be rung Answer information, wherein the response message can indicate access-user's torus network node between the system clock of heterogeneous networks when Between poor measurement capability.Specifically, response message may include the bit of predetermined quantity, and the bit of the predetermined quantity takes Value can indicate access-user's torus network node to the measurement capability of the time difference between the system clock of heterogeneous networks.

For example, response message may include 2 bits, and four values " 00 " of 2 bits, " 01 ", " 10 " and " 00 " in " 11 " can indicate that access-user's torus network node is not capable of measuring the system clock and access-control plane of TSN DN Belonging to time difference and access-control plane network node between the system clock of network belonging to network node (i.e. VPLMN) Network (i.e. VPLMN) system clock and ownership-control plane network node belonging to network (i.e. HPLMN) system clock it Between time difference." 01 " can indicate that access-user's torus network node is not capable of measuring system clock and the access-control of TSN DN Time difference between the system clock of network belonging to torus network node (i.e. VPLMN) but access-control torus network can be measured The system clock of network belonging to node (i.e. VPLMN) is with network (i.e. HPLMN) belonging to ownership-control plane network node Time difference between system clock." 10 " can indicate access-user's torus network node can measure the system clock of TSN DN with Time difference between the system clock of network (i.e. VPLMN) belonging to access-control plane network node but it is not capable of measuring access- Network belonging to the system clock and ownership-control plane network node of network belonging to control plane network node (i.e. VPLMN) is (i.e. HPLMN the time difference between system clock)." 11 " can indicate that access-user's torus network node can measure TSN DN's Time difference, Yi Jifang between the system clock of network (i.e. VPLMN) belonging to system clock and access-control plane network node Ask-control plane network node belonging to network (i.e. VPLMN) system clock and ownership-control plane network node belonging to network Both time differences between the system clock of (i.e. HPLMN).

In addition, access-control plane network node can be according to access-control plane according to the second implementation of the disclosure Network node generates the first information to the measurement capability of the time difference between the system clock of heterogeneous networks.Specifically, it visits Ask-control plane network node can be according to access-control plane network node to the time difference between the system clock of heterogeneous networks Measurement capability, determine the time parameter method of determination that access-control plane network node can be supported.Then, access-control plane Network node can generate the first information according to identified time parameter method of determination.

" time difference between the system clock of heterogeneous networks " is hereinbefore described, details are not described herein.

In the system clock and access-control veil that " time difference between the system clock of heterogeneous networks " includes TSN DN In the example of time difference between the system clock of network belonging to network node (i.e. VPLMN), access-control plane network node can To determine net belonging to system clock and access-control plane network node of the access-control plane network node to TSN DN first The measurement capability of time difference between the system clock of network (i.e. VPLMN).When access-control plane network node can measure TSN When time difference between the system clock of network (i.e. VPLMN) belonging to the system clock of DN and access-control plane network node, Access-control plane network node can not determine time parameter by ownership-control plane network node, therefore, access-control Torus network node can determine that access-control plane network node can support third method of determination.Then, access-control veil Network node can generate the first information according to third method of determination.

It include network belonging to access-control plane network node in " time difference between the system clock of heterogeneous networks " Between the system clock of network (i.e. HPLMN) belonging to system clock and ownership-the control plane network node of (i.e. VPLMN) when Between in poor example, access-control plane network node can determine access-control plane network node to access-control plane first Network (i.e. HPLMN) belonging to the system clock and ownership-control plane network node of network belonging to network node (i.e. VPLMN) System clock between time difference measurement capability.When access-control plane network node can measure access-control torus network The system clock of network belonging to node (i.e. VPLMN) is with network (i.e. HPLMN) belonging to ownership-control plane network node Unite clock between time difference when, access-control plane network node can be partially or even wholly by ownership-control torus network Node determines time parameter, and therefore, access-control plane network node can determine that access-control plane network node can prop up Hold the first method of determination and the second method of determination.Then, access-control plane network node can according to the first method of determination and/ Or second method of determination generate the first information.

In the system clock and access-control veil that " time difference between the system clock of heterogeneous networks " includes TSN DN Belonging to time difference and access-control plane network node between the system clock of network belonging to network node (i.e. VPLMN) Between the system clock of network (i.e. HPLMN) belonging to system clock and ownership-control plane network node of network (i.e. VPLMN) Time difference example in, access-control plane network node can determine access-control plane network node to TSN DN's first Time difference, Yi Jifang between the system clock of network (i.e. VPLMN) belonging to system clock and access-control plane network node Ask-control plane network node belonging to network (i.e. VPLMN) system clock and ownership-control plane network node belonging to network The measurement capability of time difference between the system clock of (i.e. HPLMN).When access-control plane network node can measure TSN DN System clock and access-control plane network node belonging to network (i.e. VPLMN) system clock between time difference, and Access-control plane network node can measure the system clock of network (i.e. VPLMN) belonging to access-control plane network node with When time difference between the system clock of network (i.e. HPLMN) belonging to ownership-control plane network node, access-control veil Network node can not by or partly by or fully determine that by ownership-control plane network node, the time joins Number, therefore, access-control plane network node can determine that access-control plane network node can support the first method of determination, the Two methods of determination and third method of determination.Then, access-control plane network node can be according to the first method of determination, and/or Two methods of determination, and/or third method of determination generate the first information.

In addition, access-control plane network node can be according to access-user face according to the third implementation of the disclosure Network node (for example, V-UPF entity 105 in Fig. 1) to the measurement capability of the time difference between the system clock of heterogeneous networks, And access-control plane network node generates institute to both measurement capabilities of time difference between the system clock of heterogeneous networks State the first information.Third is achieved in that the combination of the first implementation and the second implementation described above, herein not It repeats again.

In first implementation described above, the second implementation and third implementation, the first information can be with Implicitly or explicitly indicate that the time parameter method of determination that access-control plane network node is supported, the disclosure do not limit this It is fixed.

In addition, access-control plane network node is fully by ownership-control torus network section in the second method of determination Point is to determine time parameter, and therefore, access-control plane network node can always support the second method of determination.Therefore, the first letter Breath can not indicate the second method of determination.

Fig. 2 is returned to, in step S202, access-control plane network node receives second from ownership-control plane network node Information, wherein second information indicates the access-control plane network node time parameter method of determination to be used.For example, Ownership-control plane network node can determine what access-control plane network node was supported according to the first information in step S201 Time parameter method of determination, and select from the time parameter method of determination that access-control plane network node is supported it is a kind of as Access-control plane network node time parameter method of determination to be used.Then, ownership-control plane network node can lead to Cross the second information notice access-control plane network node in step S202.

After step S202, method 200 can also include step S203: access-control plane network node can basis Second information determines time parameter.Specifically, access-control plane network node can determine access-control according to the second information Torus network node is by time parameter method of determination to be used, then by identified time parameter method of determination come when determining Between parameter.

" time parameter " as described herein can be based on the access-control plane network node belonging network (i.e. VPLMN the TSC auxiliary information (TSC Assistance Information, TSCAI) of system clock).TSCAI describes use In the TSC traffic characteristic of 5G system.The knowledge of TSN flow rate mode be for the base station 5G (such as gNB) it is useful, to allow 5G base Stand by configure authorization, semi-persistent scheduling or dynamic authorization more effectively property dispatching cycle, deterministic Business Stream.TSCAI May include the information in direction (for example, uplink or downlink) for indicating TSC business, in TSC business data transmission It happens suddenly in period and TSC business one or more of arrival time (Burst Arrival time) etc..For example, TSCAI Definition can be found in following table 1.In addition, TSCAI can be supplied to the RAN in 5G system by SMF, such as SMF can built The RAN being supplied to TSCAI during vertical service quality stream (QoS Flow) in 5G system.

The definition of 1 TSCAI of table

In table 1, TSCAI includes burst arrival time and the periodicity of business datum of business datum (Periodicity).First data packet of business datum is reached in burst arrival time, and other data of business datum After packet is after the arrival time that happens suddenly, in the arrival 5G system wrapped with the time one of the periodical defined of business datum RAN。

Specifically, for downlink, in TSC business burst arrival time can be data from UPF reach RAN when Between.Specifically, burst arrival time T in downlink can be determined according to following formula (1)_DL:

T_DL=T₁+offset_{(TSN, PLMN)}+delay_{(NW-TT, RAN)}Formula (1)

Wherein, T₁It indicates that data reach the time of NW-TT, is the downlink " burst arrival time " provided from AF to SMF； offset_{(TSN, PLMN)}Indicate TSN DN system clock and PLMN system clock between time difference, can by SMF measure or Person is measured and reported to SMF by UPF；delay_{(NW-TT, RAN)}Indicate the propagation delay time from NW-TT to RAN.

Under the scene of terminal roaming, above-mentioned formula (1) can be modified to following formula (2):

T_DL=T₁+offset_{(TSN, VPLMN)}+delay_{(V-UPF, RAN)}+delay_{(H-UPF-NW-TT, V-UPF)}Formula (2)

Wherein, delay_{(H-UPF-NW-TT, V-UPF)}Indicate the propagation delay time from H-UPF NW-TT to V-UPF, delay_{(V-UPF, RAN)}Table Show the propagation delay time from V-PUF to RAN.delay_{(H-UPF-NW-TT, V-UPF)}With delay_{(V-UPF, RAN)}Value can pass through 5G system The internal measurement of static configuration or 5G system and obtain.offset_{(TSN, VPLMN)}The system clock and VPLMN for indicating TSN DN be Time difference between system clock.

offset_{(TSN, VPLMN)}Method of determination there are many.For example, can be measured by V-SMF.Alternatively, it is possible to by V- UPF is measured and reported to V-SMF.Alternatively, offset_{(TSN, VPLMN)}It can be offset_{(TSN, HPLMN)}With offset_{(HPLMN, VPLMN)}Sum.offset_{(TSN, HPLMN)}It indicates between the system clock of TSN DN and the system clock of HPLMN Time difference can be measured by H-SMF or be measured and reported to H-SMF by H-UPF.offset_{(HPLMN, VPLMN)}Indicate HPLMN System clock and VPLMN system clock between time difference, can be measured by V-SMF or by V-UPF be measured and be reported It accuses to V-SMF, either measured by H-SMF or H-SMF is measured and reported to by H-UPF.

For uplink, burst arrival time can be the time that data reach UE from DS-TT in TSC business.Specifically Ground can determine burst arrival time according to following formula (3):

T_UL=T₂+offset_{(TSN, PLMN)}+delay_{(DS-TT, UE)}Formula (3)

Wherein, T₂It indicates that data reach the time of DS-TT, is the uplink " burst arrival time " provided from AF to SMF. offset_{(TSN, PLMN)}Indicate TSN DN system clock and PLMN system clock between time difference, can by SMF measure or Person is measured and reported to SMF by UPF；delay_{(DS-TT, UE)}Indicate that the propagation delay time from DS-TT to UE, value can pass through 5G system The static configuration of system or the internal measurement of 5G system and obtain.

Under the scene of terminal roaming, above-mentioned formula (3) can be modified to following formula (4):

T_UL=T₂+offset_{(TSN, VPLMN)}+delay_{(DS-TT, UE)}Formula (4)

Formula (4) is similar with formula (3), wherein offset_{(TSN, VPLMN)}Method of determination partially said in formula (3) Bright, details are not described herein.

In the disclosure, as described above for measuring and/or the V-UPF and/or H-UPF of report time difference can be Dedicated for measurement and/or the UPF of report time difference.That is, for measure and/or the V-UPF of report time difference and/or H-UPF can be independently of user's torus network section of the protocol Data Unit session for the roams home for participating in time-sensitive network communication Point.For example, for measure and/or the V-UPF and/or H-UPF of report time difference can be independently of UE participation TSN communicate UPF in PDU session.Alternatively, for measuring and/or the V-UPF and/or H-UPF of report time difference are also possible to participate in User's torus network node of the protocol Data Unit session of the roams home of time-sensitive network communication.For example, for measure and/ Or the V-UPF and/or H-UPF of report time difference can be the UPF in the PDU session that UE participates in TSN communication, it not only can be with For carrying out PDU session, it can be also used for measurement and/or report time be poor.

In addition, time difference between the system clock of TSN DN described above and the system clock of HPLMN, and/or The system clock of time difference, and/or VPLMN between the system clock of TSN DN and the system clock of VPLMN and HPLMN's is It time difference between system clock, can be by being used to measure heterogeneous networks defined in standard IEEE 1588 or IEEE802.1AS System clock between time difference method or algorithm realize.

By the description to " time parameter " in step S203, in above-mentioned steps S203, access-control torus network section O'clock time parameter is determined specifically according to the second information and can be access-control plane network node and determines that the time joins according to the second information " burst arrival time " in number.That is, access-control plane network node can determine access-control according to the second information Then torus network node processed determines time parameter method of determination to be used by identified time parameter method of determination " burst arrival time " in time parameter.

Access-control plane network node be will be detailed below by identified time parameter method of determination come when determining Between " burst arrival time " in parameter illustrative process.Hereinafter, for convenience, by access-control plane network node It is known as " the second time parameter " by the time parameter of identified time parameter method of determination determination.

According to the first example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the first method of determination, access-control plane network node can be by the first method of determination come when determining Between " burst arrival time " in parameter.

Specifically, in the first example, access-control plane network node can be received from ownership-control plane network node First time parameter, wherein the first time parameter is based on the ownership-control plane network node belonging network system The time parameter of clock.Then, when access-control plane network node can determine second according at least to the first time parameter Between parameter, wherein second time parameter is based on the access-control plane network node belonging network system clock Time parameter.For example, access-control plane network node can be according to the first time parameter and the ownership-control plane Between the system clock of network node belonging network and the access-control plane network node belonging network system clock when Between it is poor, determine the second time parameter.

For example, in the first example, access-control plane network node can receive base from ownership-control plane network node " burst in the TSCAI of the ownership-control plane network node belonging network (i.e. HPLMN) system clock, the TSCAI Arrival time " is based on the ownership-control plane network node belonging network (i.e. HPLMN) system clock.Then, it visits - control plane the network node TSCAI and the ownership-control veil that can provide according to ownership-control plane network node are provided The system clock of network node belonging network (i.e. HPLMN) and the access-control plane network node belonging network (i.e. VPLMN) Time difference offset between system clock_{(HPLMN, VPLMN)}, ownership-control torus network is modified by above-mentioned formula (2) or (4) " burst arrival time " in the TSCAI that node provides, the access-control plane network node belonging network is based on to obtain " burst arrival time " in the TSCAI of the system clock of (i.e. VPLMN).It should be based on the access-control plane network node institute " the burst arrival time " belonged in the TSCAI of the system clock of network (i.e. VPLMN) is based on the access-control torus network section The system clock of point belonging network (i.e. VPLMN).

According to the second example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the second method of determination, access-control plane network node can be by the second method of determination come when determining Between " burst arrival time " in parameter.

Specifically, in the second example, access-control plane network node can be received from ownership-control plane network node Second time parameter, when wherein second time parameter is based on the access-control plane network node belonging network system The time parameter of clock.

For example, in the second example, access-control plane network node can receive base from ownership-control plane network node " burst in the TSCAI of the access-control plane network node belonging network (i.e. VPLMN) system clock, the TSCAI Arrival time " is based on the access-control plane network node belonging network (i.e. VPLMN) system clock.That is, When ownership-control plane network node will be based on the ownership-control plane network node belonging network (i.e. HPLMN) system The TSCAI of clock is revised as the TSCAI based on the access-control plane network node belonging network (i.e. VPLMN) system clock, Therefore, access-control plane network node no longer needs to be implemented modification operation and can directly obtain based on the access-control plane The TSCAI of the system clock of network node belonging network (i.e. VPLMN).

According to the third example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is third method of determination, access-control plane network node can be by third method of determination come when determining Between " burst arrival time " in parameter.

Specifically, in third example, access-control plane network node can be from the ownership-control plane network node Third time parameter is received, wherein the third time parameter is based on the ownership-control plane network node belonging network The time parameter of the system clock of external network.Then, access-control plane network node can be according at least to the third time Parameter determines the second time parameter, wherein second time parameter is based on the access-affiliated net of control plane network node The time parameter of the system clock of network.For example, access-control plane network node can according to the third time parameter and The system clock and the access-control plane network node of the ownership-control plane network node belonging network external network Time difference between the system clock of belonging network determines the second time parameter.

For example, access-control plane network node can receive base from ownership-control plane network node in third example It, should in the TSCAI of the system clock of the ownership-control plane network node belonging network external network (i.e. TSN DN) " burst arrival time " in TSCAI is based on the ownership-control plane network node belonging network external network (i.e. TSN DN system clock).Then, access-control plane network node can be provided according to ownership-control plane network node The system clock of TSCAI and the ownership-control plane network node belonging network external network (i.e. TSN DN) with it is described Time difference offset between access-control plane network node belonging network (i.e. VPLMN) system clock_{(TSN, VPLMN)}, pass through " the burst arrival time " in the TSCAI that ownership-control plane network node provides is modified in above-mentioned formula (2) or (4), to obtain In TSCAI based on the access-control plane network node belonging network (i.e. VPLMN) system clock " burst reach when Between ".It should be based on " the burst in the TSCAI of the access-control plane network node belonging network (i.e. VPLMN) system clock Arrival time " is based on the access-control plane network node belonging network (i.e. VPLMN) system clock.

The method executed by access-control plane network node through this embodiment, access-control plane network node can be with Send the information for being used to indicate the time parameter method of determination itself supported to ownership-control plane network node, and from ownership- Control plane network node receives the letter for being used to indicate access-control plane network node time parameter method of determination to be used Breath, controls access-control plane network node time parameter to be used to realize by ownership-control plane network node Method of determination, so that access-control plane network node determines time parameter according to the time parameter method of determination, so as to Correct time parameter is provided to RAN, is avoided due to the time difference between V-PLMN and H-PLMN or even if in same time zone It is interior but cause time drift using different master clocks and lead to " burst arrival time " inaccuracy in TSCAI.

The side executed by ownership-control plane network node according to the embodiment of the present disclosure is described next, with reference to Fig. 4 Method.Fig. 4 is the flow chart according to the method 400 of the embodiment of the present disclosure executed by ownership-control plane network node.Due to basis Method 400 execute operations described below detail it is identical as the details described above with reference to Fig. 2, therefore herein in order to It avoids repeating and omitting the repeated description to same detail.

As described in Figure 4, in step S401, ownership-control plane network node receives the from access-control plane network node One information, wherein the first information indicates the time parameter method of determination that the access-control plane network node is supported.

In the disclosure, the time parameter method of determination that access-control plane network node is supported can have one or more. For example, access-the time parameter method of determination supported of control plane network node can there are three types of, respectively the first method of determination, Second method of determination and third method of determination.Specifically, the first method of determination be with can referring to access-control plane network node portion Time parameter is determined by ownership-control plane network node, the second method of determination can refer to that access-control plane network node is complete Time parameter is determined by ownership-control plane network node entirely, third method of determination can refer to access-control torus network section Point does not determine time parameter by ownership-control plane network node.

Then, in step S402, ownership-control plane network node sends the to the access-control plane network node Two information, wherein second information indicates access-control plane network node time parameter method of determination to be used. For example, ownership-control plane network node can determine access-control plane network node branch according to the first information in step S401 The time parameter method of determination held, and one kind is selected from the time parameter method of determination that access-control plane network node is supported As access-control plane network node time parameter method of determination to be used.Then, ownership-control plane network node can To notify access-control plane network node by the second information in step S402.

" time parameter " as described herein can be based on the access-control plane network node belonging network (i.e. VPLMN the TSC auxiliary information (TSC Assistance Information, TSCAI) of system clock).TSCAI may include Indicate the information in direction (for example, uplink or downlink) of TSC business, in TSC business the transmission cycle of data and It happens suddenly in TSC business one or more of arrival time (Burst Arrival time) etc..Hereinafter, for convenience, Access-control plane network node is known as " when second by the time parameter of identified time parameter method of determination determination Between parameter ".

According to the first example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the first method of determination, ownership-control plane network node can be sent to access-control plane network node First time parameter, wherein the first time parameter is based on the ownership-control plane network node belonging network system The time parameter of clock.Correspondingly, access-control plane network node determined for the second time according at least to the first time parameter Parameter, wherein second time parameter be based on the access-control plane network node belonging network system clock when Between parameter.For example, access-control plane network node can be according to the first time parameter and the ownership-control veil Time between the system clock of network node belonging network and the access-control plane network node belonging network system clock Difference determines the second time parameter.

For example, in the first example, ownership-control plane network node can send base to access-control plane network node " burst in the TSCAI of the ownership-control plane network node belonging network (i.e. HPLMN) system clock, the TSCAI Arrival time " is based on the ownership-control plane network node belonging network (i.e. HPLMN) system clock.Then, it visits - control plane the network node TSCAI and the ownership-control veil that can provide according to ownership-control plane network node are provided The system clock of network node belonging network (i.e. HPLMN) and the access-control plane network node belonging network (i.e. VPLMN) Time difference offset between system clock_{(HPLMN, VPLMN)}, ownership-control torus network is modified by above-mentioned formula (2) or (4) " burst arrival time " in the TSCAI that node provides, the access-control plane network node belonging network is based on to obtain " burst arrival time " in the TSCAI of the system clock of (i.e. VPLMN).It should be based on the access-control plane network node institute " the burst arrival time " belonged in the TSCAI of the system clock of network (i.e. VPLMN) is based on the access-control torus network section The system clock of point belonging network (i.e. VPLMN).

In this example, ownership-control plane network node is returned to what access-control plane network node was sent based on described The TSCAI of category-control plane network node belonging network (i.e. HPLMN) system clock can be according to based on the ownership-control The TSCAI and the ownership-control plane of the system clock of the external network (i.e. TSN DN) of torus network node belonging network processed The system clock and the ownership-affiliated net of control plane network node of the external network (i.e. TSN DN) of network node belonging network Time difference between the system clock of network (i.e. HPLMN) and it is determined.

According to the second example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the second method of determination, ownership-control plane network node can be to the access-control plane network node The second time parameter is sent, wherein second time parameter is based on the access-control plane network node belonging network The time parameter of system clock.

For example, in the second example, ownership-control plane network node can send base to access-control plane network node " burst in the TSCAI of the access-control plane network node belonging network (i.e. VPLMN) system clock, the TSCAI Arrival time " is based on the access-control plane network node belonging network (i.e. VPLMN) system clock.That is, When ownership-control plane network node will be based on the ownership-control plane network node belonging network (i.e. HPLMN) system The TSCAI of clock is revised as the TSCAI based on the access-control plane network node belonging network (i.e. VPLMN) system clock, Therefore, access-control plane network node no longer needs to be implemented modification operation and can directly obtain based on the access-control plane The TSCAI of the system clock of network node belonging network (i.e. VPLMN).

In this example, ownership-control plane network node is to access-control plane network node transmission based on the visit Ask-TSCAI of the system clock of control plane network node belonging network (i.e. VPLMN) can be according to based on the ownership-control The TSCAI of the system clock of the external network (i.e. TSN DN) of torus network node belonging network processed, the ownership-control torus network The system clock and the ownership-control plane network node belonging network of the external network (i.e. TSN DN) of node belonging network Time difference and the ownership-control plane network node belonging network (i.e. HPLMN) between the system clock of (i.e. HPLMN) System clock and the access-control plane network node belonging network (i.e. VPLMN) system clock between time difference and It is determined.

According to the third example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is third method of determination, ownership-control plane network node can be to the access-control plane network node Third time parameter is sent, wherein the third time parameter is based on the ownership-control plane network node belonging network The time parameter of the system clock of external network.Correspondingly, when access-control plane network node can be according at least to the third Between parameter determine the second time parameter, wherein second time parameter is based on belonging to the access-control plane network node The time parameter of the system clock of network.For example, access-control plane network node can according to the third time parameter, with And the system clock of the ownership-control plane network node belonging network external network and the access-control torus network section Time difference between the system clock of point belonging network, determine the second time parameter.

For example, ownership-control plane network node can send base to access-control plane network node in third example It, should in the TSCAI of the system clock of the ownership-control plane network node belonging network external network (i.e. TSN DN) " burst arrival time " in TSCAI is based on the ownership-control plane network node belonging network external network (i.e. TSN DN system clock).Then, access-control plane network node can be provided according to ownership-control plane network node The system clock of TSCAI and the ownership-control plane network node belonging network external network (i.e. TSN DN) with it is described Time difference offset between access-control plane network node belonging network (i.e. VPLMN) system clock_{(TSN, VPLMN)}, pass through " the burst arrival time " in the TSCAI that ownership-control plane network node provides is modified in above-mentioned formula (2) or (4), to obtain In TSCAI based on the access-control plane network node belonging network (i.e. VPLMN) system clock " burst reach when Between ".It should be based on " the burst in the TSCAI of the access-control plane network node belonging network (i.e. VPLMN) system clock Arrival time " is based on the access-control plane network node belonging network (i.e. VPLMN) system clock.

The method executed by ownership-control plane network node through this embodiment, ownership-control plane network node can be with The time parameter method of determination for being used to indicate access-control plane network node and being supported is received from access-control plane network node Information, and be used to indicate access-control plane network node time ginseng to be used to access-control plane network node transmission Number methods of determination information, thus realize by ownership-control plane network node control access-control plane network node will The time parameter method of determination used, so that access-control plane network node is according to the time parameter method of determination come really Fix time parameter, to provide correct time parameter to RAN, avoid due between V-PLMN and H-PLMN time difference or Time drift is caused using different master clocks in same time zone and leads to " burst arrival time " in TSCAI no Accurately.

The tool for the method that wireless time sensitive communication system is realized according to the embodiment of the present disclosure is described below in conjunction with Fig. 5 The schematic diagram of body process.Fig. 5 is the exemplary flow for the method that wireless time sensitive communication system is realized according to the embodiment of the present disclosure Figure.Example shown in fig. 5 is based on the PDU session establishment process under UE roams home scene.

As shown in figure 5, V-SMF can send N4 session establishment to V-UPF by N4 interface and request (N4 in step 1a Session Establishment Request), and N4 session establishment request may include the step in the above method 300 Solicited message in rapid S301, when the system which can be used for requesting V-UPF to feed back it to heterogeneous networks to V-SMF The measurement capability of time difference between clock.

Then, in step 1b, V-UPF can send N4 session establishment to V-SMF by N4 interface and respond (N4 Session Establishment Response), and N4 session establishment response may include the step in the above method 300 Response message in rapid S302, the response message can indicate V-UPF to the time difference between the system clock of heterogeneous networks Measurement capability.

Then, in step 2, V-SMF can send Nsmf_PDU session _ request to create to H-SMF by Nsmf interface (Nsmf_PDUSession_Create Request), and the Nsmf_PDU session _ request to create may include the above method The first information in step S201 in 200, the first information can indicate the time parameter method of determination that V-SMF is supported.

Then, in step 3, H-SMF can send Nsmf_PDU session _ creation to V-SMF by Nsmf interface and respond (Nsmf_PDUSession_Create Response), and the Nsmf_PDU session _ creation response may include the above method The second information in step S202 in 200, second information can indicate that H-SMF is that the time parameter that V-SMF is determined determines Mode.

Example shown in fig. 5 can also include other steps.These steps, and this has been defined in 3GPP standard criterion The summary of the invention of a little steps and the disclosure is unrelated, and therefore, details are not described herein.

Wireless time sensitive communication system is described below in conjunction with Fig. 6-7 to realize according to the first of the embodiment of the present disclosure really Determine mode determine time parameter detailed process schematic diagram.Fig. 6 is that wireless time sensitive communication system is realized according to this public affairs The first method of determination of embodiment is opened to determine the schematic flow diagram of time parameter.Example shown in fig. 6 is based on UE roams home PDU session modification process under scene.PDU session modification process can be initiated by UE or be initiated by SMF or be sent out by PCF Rise etc..

As shown in fig. 6, in step 1a, H-SMF can send Nsmf_PDU session _ more to V-SMF by Nsmf interface New request (Nsmf_PDUSession_Update Request), and the Nsmf_PDU session _ update request includes being based on " burst arrival time " in the TSCAI of the system clock of HPLMN, the TSCAI is the system clock based on HPLMN.

In step 1b, V-SMF obtains the time difference between the system clock of HPLMN and the system clock of VPLMN offset_{(HPLMN, VPLMN)}.For example, such as described above in association with formula (2), offset_{(HPLMN, VPLMN)}It can be measured by V-SMF Or V-SMF is measured and reported to by V-UPF.Alternatively, offset_{(HPLMN, VPLMN)}It can be measured by H-SMF or by H- UPF is measured and reported to H-SMF, and then H-SMF can be by offset_{(HPLMN, VPLMN)}It notifies to V-SMF.

It is noted that the disclosure do not limit above-mentioned steps 1a and 1b execute sequence.For example, may be performed simultaneously above-mentioned step Rapid 1a and step 1b, can perhaps first carry out above-mentioned steps 1a and execute above-mentioned steps 1b again or can first carry out above-mentioned steps 1b executes above-mentioned steps 1a again.

Then, in step 1c, the TSCAI of the system clock based on HPLMN can be revised as being based on VPLMN by V-SMF System clock TSCAI.For example, V-SMF can be according to the system based on HPLMN according to the first example as described above The TSCAI of clock and pass through the time between the system clock of HPLMN acquired in step 1b and the system clock of VPLMN Poor offset_{(HPLMN, VPLMN)}, the TSCAI of the system clock based on HPLMN is revised as by base by above-mentioned formula (2) or (4) In the TSCAI of the system clock of VPLMN." burst arrival time " in modified TSCAI is the system clock based on VPLMN 's.

Then, in step 2a, V-SMF can send Nsmf_PDU session _ update SM content to AMF by Nsmf interface It responds (Nsmf_PDUSession_UpdateSMContext Response), the Nsmf_PDU session _ update SM content response TSCAI including the system clock based on VPLMN.Alternatively, in step 2b, AMF and V-SMF can pass through Namf interface Namf_ communication _ N1N2 messaging (Namf_Communication_N1N2MessageTransfer) is transmitted, the Namf_ is logical Letter _ N1N2 messaging includes the TSCAI of the system clock based on VPLMN.

Then, in step 3, AMF sends N2 session request (N2 Session to (R) AN by N2 interface Request), and the N2 session request include the system clock based on VPLMN TSCAI.

Example shown in fig. 6 can also include other steps.These steps, and this has been defined in 3GPP standard criterion The summary of the invention of a little steps and the disclosure is unrelated, and therefore, details are not described herein.

Fig. 7 is that wireless time sensitive communication system realizes the first method of determination according to the embodiment of the present disclosure to determine the time Another schematic flow diagram of parameter.Example shown in Fig. 7 is based on the PDU session establishment process under UE roams home scene.

As shown in fig. 7, H-SMF can send Nsmf_PDU session _ wound to V-SMF by Nsmf interface in step 1a It builds response (Nsmf_PDUSession_Create Response), and the Nsmf_PDU session _ creation response includes being based on " burst arrival time " in the TSCAI of the system clock of HPLMN, the TSCAI is the system clock based on HPLMN.

In step 1b, V-SMF obtains the time difference between the system clock of HPLMN and the system clock of VPLMN offset_{(HPLMN, VPLMN)}.For example, such as described above in association with formula (2), offset_{(HPLMN, VPLMN)}It can be measured by V-SMF Or V-SMF is measured and reported to by V-UPF.Alternatively, offset_{(HPLMN, VPLMN)}It can be measured by H-SMF or by H- UPF is measured and reported to H-SMF, and then H-SMF can be by offset_{(HPLMN, VPLMN)}It notifies to V-SMF.

It is noted that the disclosure do not limit above-mentioned steps 1a and 1b execute sequence.For example, may be performed simultaneously above-mentioned step Rapid 1a and step 1b, can perhaps first carry out above-mentioned steps 1a and execute above-mentioned steps 1b again or can first carry out above-mentioned steps 1b executes above-mentioned steps 1a again.

Then, in step 1c, the TSCAI of the system clock based on HPLMN can be revised as being based on VPLMN by V-SMF System clock TSCAI.For example, V-SMF can be according to the system based on HPLMN according to the first example as described above The TSCAI of clock and pass through the time between the system clock of HPLMN acquired in step 1b and the system clock of VPLMN Poor offset_{(HPLMN, VPLMN)}, the TSCAI of the system clock based on HPLMN is revised as by base by above-mentioned formula (2) or (4) In the TSCAI of the system clock of VPLMN." burst arrival time " in modified TSCAI is the system clock based on VPLMN 's.

Then, in step 2, AMF and V-SMF can transmit Namf_ communication _ N1N2 messaging by Namf interface (Namf_Communication_N1N2MessageTransfer), which includes being based on The TSCAI of the system clock of VPLMN.

Then, in step 3, AMF sends N2 PDU session request (N2 PDU Session to (R) AN by N2 interface Request), and the N2 PDU session request include the system clock based on VPLMN TSCAI.

Example shown in Fig. 7 can also include other steps.These steps, and this has been defined in 3GPP standard criterion The summary of the invention of a little steps and the disclosure is unrelated, and therefore, details are not described herein.

Wireless time sensitive communication system is described below in conjunction with Fig. 8-9 to realize according to the second of the embodiment of the present disclosure really Determine mode determine time parameter detailed process schematic diagram.Fig. 8 is that wireless time sensitive communication system is realized according to this public affairs The second method of determination of embodiment is opened to determine the schematic flow diagram of time parameter.Example shown in Fig. 8 is based on UE roams home PDU session modification process under scene.

As shown in figure 8, H-SMF is obtained between the system clock of HPLMN and the system clock of VPLMN in step 1a Time difference offset_{(HPLMN, VPLMN)}.For example, such as described above in association with formula (2), offset_{(HPLMN, VPLMN)}It can be by H- SMF is measured or is measured and reported to H-SMF by H-UPF.Alternatively, offset_{(HPLMN, VPLMN)}Can by V-SMF measure or Person is measured and reported to V-SMF by V-UPF, and then V-SMF can be by offset_{(HPLMN, VPLMN)}It notifies to H-SMF.

Then, in step 1b, the TSCAI of the system clock based on HPLMN can be revised as being based on VPLMN by H-SMF System clock TSCAI.For example, H-SMF can be according to the system based on HPLMN according to the second example as described above The TSCAI of clock and pass through the time between the system clock of HPLMN acquired in step 1a and the system clock of VPLMN Poor offset (HPLMN, VPLMN) is modified the TSCAI of the system clock based on HPLMN by above-mentioned formula (2) or (4) For the TSCAI of the system clock based on VPLMN." burst arrival time " in modified TSCAI is the system based on VPLMN Clock.

Then, in step 1c, H-SMF can send Nsmf_PDU session _ update to V-SMF by Nsmf interface and request (Nsmf_PDUSession_Update Request), and the Nsmf_PDU session _ update request includes being based on VPLMN " burst arrival time " in the TSCAI of system clock, the TSCAI is the system clock based on VPLMN.

Because " the burst arrival time " in the TSCAI in step 1c is already based on the system clock of VPLMN, so V- SMF is not necessarily to the time for making to continue as is seen in fig. 6 or fig. 7 adjustment, and this TSCAI directly can be sent to (R) AN.That is, In In step 2a, V-SMF can send Nsmf_PDU session _ update SM content response (Nsmf_ to AMF by Nsmf interface PDUSession_UpdateSMContext Response), the Nsmf_PDU session _ update SM content response includes being based on The TSCAI of the system clock of VPLMN.Alternatively, in step 2b, AMF and V-SMF can be transmitted by Namf interface Namf_ communication _ N1N2 messaging (Namf_Communication_N1N2MessageTransfer), Namf_ communication _ N1N2 messaging includes the TSCAI of the system clock based on VPLMN.

Then, in step 3, AMF sends N2 session request (N2 Session to (R) AN by N2 interface Request), and the N2 session request include the system clock based on VPLMN TSCAI.

Example shown in Fig. 8 can also include other steps.These steps, and this has been defined in 3GPP standard criterion The summary of the invention of a little steps and the disclosure is unrelated, and therefore, details are not described herein.

Fig. 9 is that wireless time sensitive communication system realizes the second method of determination according to the embodiment of the present disclosure to determine the time Another schematic flow diagram of parameter.Example shown in Fig. 9 is based on the PDU session establishment process under UE roams home scene.

As shown in figure 9, H-SMF is obtained between the system clock of HPLMN and the system clock of VPLMN in step 1a Time difference offset_{(HPLMN, VPLMN)}.For example, such as described above in association with formula (2), offset_{(HPLMN, VPLMN)}It can be by H- SMF is measured or is measured and reported to H-SMF by H-UPF.Alternatively, offset_{(HPLMN, VPLMN)}Can by V-SMF measure or Person is measured and reported to V-SMF by V-UPF, and then V-SMF can be by offset_{(HPLMN, VPLMN)}It notifies to H-SMF.

Then, in step 1b, the TSCAI of the system clock based on HPLMN can be revised as being based on VPLMN by H-SMF System clock TSCAI.For example, H-SMF can be according to the system based on HPLMN according to the second example as described above The TSCAI of clock and pass through the time between the system clock of HPLMN acquired in step 1a and the system clock of VPLMN Poor offset (HPLMN, VPLMN) is modified the TSCAI of the system clock based on HPLMN by above-mentioned formula (2) or (4) For the TSCAI of the system clock based on VPLMN." burst arrival time " in modified TSCAI is the system based on VPLMN Clock.

Then, in step 1c, H-SMF can send Nsmf_PDU session _ creation to V-SMF by Nsmf interface and respond (Nsmf_PDUSession_Create Response), and the Nsmf_PDU session _ creation response includes based on VPLMN's " burst arrival time " in the TSCAI of system clock, the TSCAI is the system clock based on VPLMN.

Because " the burst arrival time " in the TSCAI in step 1c is already based on the system clock of VPLMN, so V- SMF is not necessarily to the time for making to continue as is seen in fig. 6 or fig. 7 adjustment, and this TSCAI directly can be sent to (R) AN.That is, In In step 2, AMF and V-SMF can transmit Namf_ communication _ N1N2 messaging (Namf_ by Namf interface Communication_N1N2MessageTransfer), which includes being based on VPLMN The TSCAI of system clock.

Then, in step 3, AMF sends N2 PDU session request (N2 PDU Session to (R) AN by N2 interface Request), and the N2 PDU session request include the system clock based on VPLMN TSCAI.

Example shown in Fig. 9 can also include other steps.These steps, and this has been defined in 3GPP standard criterion The summary of the invention of a little steps and the disclosure is unrelated, and therefore, details are not described herein.

The realization of wireless time sensitive communication system is described below in conjunction with Figure 10-11 according to the third of the embodiment of the present disclosure Method of determination determines the schematic diagram of the detailed process of time parameter.Figure 10 is that wireless time sensitive communication system is realized according to this The third method of determination of embodiment is disclosed to determine the schematic flow diagram of time parameter.It is unrestrained that example shown in Fig. 10 is based on UE ownership Swim the PDU session modification process under scene.

As shown in Figure 10, in step 1a, H-SMF can send Nsmf_PDU session _ more to V-SMF by Nsmf interface New request (Nsmf_PDUSession_Update Request), and the Nsmf_PDU session _ update request includes being based on TSN " burst arrival time " in the TSCAI of the system clock of DN, the TSCAI is the system clock based on TSN DN.

In step 1b, V-SMF obtains the time difference between the system clock of TSN DN and the system clock of VPLMN offset_{(TSN, VPLMN)}.For example, such as described above in association with formula (2), offset_{(TSN, VPLMN)}Can by V-SMF measure or Person is measured and reported to V-SMF by V-UPF.

It is noted that the disclosure do not limit above-mentioned steps 1a and 1b execute sequence.For example, may be performed simultaneously above-mentioned step Rapid 1a and step 1b, can perhaps first carry out above-mentioned steps 1a and execute above-mentioned steps 1b again or can first carry out above-mentioned steps 1b executes above-mentioned steps 1a again.

Then, in step 1c, the TSCAI of the system clock based on TSN DN can be revised as being based on VPLMN by V-SMF System clock TSCAI.For example, V-SMF can be according to the system based on TSN DN according to third example as described above The TSCAI of clock and pass through the time between the system clock of TSN DN and the system clock of VPLMN acquired in step 1b Poor offset_{(TSN, VPLMN)}, the TSCAI of the system clock based on TSNDN is revised as being based on by above-mentioned formula (2) or (4) The TSCAI of the system clock of VPLMN." burst arrival time " in modified TSCAI is the system clock based on VPLMN 's.

Then, in step 2a, V-SMF can send Nsmf_PDU session _ update SM content to AMF by Nsmf interface It responds (Nsmf_PDUSession_UpdateSMContext Response), the Nsmf_PDU session _ update SM content response TSCAI including the system clock based on VPLMN.Alternatively, in step 2b, AMF and V-SMF can pass through Namf interface Namf_ communication _ N1N2 messaging (Namf_Communication_N1N2MessageTransfer) is transmitted, the Namf_ is logical Letter _ N1N2 messaging includes the TSCAI of the system clock based on VPLMN.

Then, in step 3, AMF sends N2 session request (N2 Session to (R) AN by N2 interface Request), and the N2 session request include the system clock based on VPLMN TSCAI.

Example shown in Fig. 10 can also include other steps.These steps have been defined in 3GPP standard criterion, and The summary of the invention of these steps and the disclosure is unrelated, and therefore, details are not described herein.

Figure 11 is that wireless time sensitive communication system is realized according to the third method of determination of the embodiment of the present disclosure come when determining Between parameter another schematic flow diagram.Example shown in Figure 11 is based on the PDU session establishment process under UE roams home scene.

As shown in figure 11, in step 1a, H-SMF can send Nsmf_PDU session _ wound to V-SMF by Nsmf interface It builds response (Nsmf_PDUSession_Create Response), and the Nsmf_PDU session _ creation response includes being based on " burst arrival time " in the TSCAI of the system clock of TSN DN, the TSCAI is the system clock based on TSN DN.

In step 1b, V-SMF obtains the time difference between the system clock of TSN DN and the system clock of VPLMN offset_{(TSN, VPLMN)}.For example, such as described above in association with formula (2), offset_{(TSN, VPLMN)}Can by V-SMF measure or Person is measured and reported to V-SMF by V-UPF.

It is noted that the disclosure do not limit above-mentioned steps 1a and 1b execute sequence.For example, may be performed simultaneously above-mentioned step Rapid 1a and step 1b, can perhaps first carry out above-mentioned steps 1a and execute above-mentioned steps 1b again or can first carry out above-mentioned steps 1b executes above-mentioned steps 1a again.

Then, in step 1c, the TSCAI of the system clock based on TSN DN can be revised as being based on VPLMN by V-SMF System clock TSCAI.For example, according to third example as described above, V-SMF can be according to based on TSN DN Unite clock TSCAI and by between the system clock of TSN DN and the system clock of VPLMN acquired in step 1b when Between difference offset_{(TSN, VPLMN)}, the TSCAI of the system clock based on TSNDN is revised as by base by above-mentioned formula (2) or (4) In the TSCAI of the system clock of VPLMN." burst arrival time " in modified TSCAI is the system clock based on VPLMN 's.

Then, in step 2, AMF and V-SMF can transmit Namf_ communication _ N1N2 messaging by Namf interface (Namf_Communication_N1N2MessageTransfer), which includes being based on The TSCAI of the system clock of VPLMN.

Then, in step 3, AMF sends N2 PDU session request (N2 PDU Session to (R) AN by N2 interface Request), and the N2 PDU session request include the system clock based on VPLMN TSCAI.

Example shown in Figure 11 can also include other steps.These steps have been defined in 3GPP standard criterion, and The summary of the invention of these steps and the disclosure is unrelated, and therefore, details are not described herein.

Hereinafter, 2 describing access-control plane corresponding with method shown in Fig. 2 according to the embodiment of the present disclosure referring to Fig.1 Network node.Figure 12 is access-control plane network node 1200 structural schematic diagram according to the embodiment of the present disclosure.Due to visiting Ask-function of control plane network node 1200 is identical as the details of method described above with reference to Fig. 2, therefore be herein For the sake of simplicity, omitting the detailed description to identical content.As shown in figure 12, access-control plane network node 1200 includes: hair Unit 1210 is sent, is configured as sending the first information to ownership-control plane network node, wherein described in first information instruction The time parameter method of determination that access-control plane network node is supported；And receiving unit 1220, it is configured as returning from described Category-control plane network node receives the second information, wherein second information indicates that the access-control plane network node will The time parameter method of determination used.Other than the two units, access-control plane network node 1200 can also include it His component, however, omitting its diagram and description herein since these components are unrelated with the content of the embodiment of the present disclosure.

In the disclosure, the time parameter method of determination that access-control plane network node is supported can have one or more. For example, access-the time parameter method of determination supported of control plane network node can there are three types of, respectively the first method of determination, Second method of determination and third method of determination.Specifically, the first method of determination be with can referring to access-control plane network node portion Time parameter is determined by ownership-control plane network node, the second method of determination can refer to that access-control plane network node is complete Time parameter is determined by ownership-control plane network node entirely, third method of determination can refer to access-control torus network section Point does not determine time parameter by ownership-control plane network node.This variety of method of determination can be adapted for different operations Quotient, to improve the popularity of application.

According to the first implementation of the disclosure, access-control plane network node 1200 can also include processing unit (figure In be not shown), which is configured as according to access-user's torus network node (for example, V-UPF entity 105 in Fig. 1) To the measurement capability of the time difference between the system clock of heterogeneous networks, the first information is generated.Specifically, access-control Torus network node can determine access-survey of user's torus network node to the time difference between the system clock of heterogeneous networks first Amount ability.Then, access-control plane network node can according to access-user's torus network node to the systems of heterogeneous networks when The measurement capability of time difference between clock determines the time parameter method of determination that access-control plane network node can be supported.So Afterwards, access-control plane network node can generate the first information according to identified time parameter method of determination.

In the first implementation, processing unit can determine access-user's torus network node by following mode To the measurement capability of the time difference between the system clock of heterogeneous networks.

Specifically, processing unit can send solicited message to access-user's torus network node, and wherein the solicited message can For requesting access to-user's torus network node system clock from heterogeneous networks to access-control plane network node that feed back it to Between time difference measurement capability.For example, the solicited message can be used for requesting access to-user's torus network node to access- Control plane network node feeds back network belonging to its system clock and access-control plane network node to TSN DN (i.e. VPLMN the system clock of the time difference between system clock, network (i.e. VPLMN) belonging to access-control plane network node) At least one of time difference between the system clock of network (i.e. HPLMN) belonging to ownership-control plane network node etc. Measurement capability.

Then, processing unit can receive response message from access-user's torus network node, and wherein the response message can be with Indicate access-user's torus network node to the measurement capability of the time difference between the system clock of heterogeneous networks.Specifically, it responds Information may include the bit of predetermined quantity, and the value of the bit of the predetermined quantity can indicate access-user's torus network Measurement capability of the node to the time difference between the system clock of heterogeneous networks.

In addition, access-control plane network node 1200 can also include that processing is single according to the second implementation of the disclosure First (not shown), the processing unit are configured as the system clock according to access-control plane network node to heterogeneous networks Between time difference measurement capability, generate the first information.Specifically, access-control plane network node can be according to visit Ask-control plane network node to the measurement capability of the time difference between the system clock of heterogeneous networks, determine access-control veil The time parameter method of determination that network node can be supported.Then, access-control plane network node can be according to the identified time Parameter method of determination generates the first information.

In addition, access-control plane network node 1200 can also include that processing is single according to the third implementation of the disclosure First (not shown), the processing unit are configured as according to access-user's torus network node (for example, the V-UPF in Fig. 1 is real Body 105) to the measurement capability of the time difference between the system clock of heterogeneous networks and access-control plane network node to not With both measurement capabilities of time difference between the system clock of network, the first information is generated.Third is achieved in that The combination of first implementation and the second implementation described in face, details are not described herein.

In first implementation described above, the second implementation and third implementation, the first information can be with Implicitly or explicitly indicate that the time parameter method of determination that access-control plane network node is supported, the disclosure do not limit this It is fixed.

In addition, access-control plane network node is fully by ownership-control torus network section in the second method of determination Point is to determine time parameter, and therefore, access-control plane network node can always support the second method of determination.Therefore, the first letter Breath can not indicate the second method of determination.

In addition, in the disclosure, processing unit can determine time parameter according to the second information.Specifically, processing unit Access-control plane network node time parameter method of determination to be used can be determined according to the second information, then pass through institute Determining time parameter method of determination determines time parameter.

" time parameter " as described herein can be based on the access-control plane network node belonging network (i.e. VPLMN the TSC auxiliary information (TSC Assistance Information, TSCAI) of system clock).TSCAI may include Indicate the information in direction (for example, uplink or downlink) of TSC business, in TSC business the transmission cycle of data and It happens suddenly in TSC business one or more of arrival time (Burst Arrival time) etc..

By the description to " time parameter ", processing unit, which determines time parameter specifically according to the second information, can be processing Unit determines " burst arrival time " in time parameter according to the second information.That is, processing unit can be according to second Information determines access-control plane network node time parameter method of determination to be used, is then joined by the identified time Method of determination is counted to determine " the burst arrival time " in time parameter.

Access-control plane network node be will be detailed below by identified time parameter method of determination come when determining Between " burst arrival time " in parameter illustrative process.Hereinafter, for convenience, by access-control plane network node It is known as " the second time parameter " by the time parameter of identified time parameter method of determination determination.

According to the first example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the first method of determination, processing unit can be determined in time parameter by the first method of determination " burst arrival time ".

Specifically, in the first example, receiving unit 1220 can receive at the first time from ownership-control plane network node Parameter, wherein the first time parameter be based on the ownership-control plane network node belonging network system clock when Between parameter.Then, processing unit can determine the second time parameter according at least to the first time parameter, wherein described second Time parameter is the time parameter based on the access-control plane network node belonging network system clock.For example, processing is single Member can be according to the first time parameter and the ownership-control plane network node belonging network system clock and institute The time difference between access-control plane network node belonging network system clock is stated, determines the second time parameter.

According to the second example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the second method of determination, processing unit can be determined in time parameter by the second method of determination " burst arrival time ".

Specifically, in the second example, receiving unit 1220 can receive for the second time from ownership-control plane network node Parameter, wherein second time parameter is the time based on the access-control plane network node belonging network system clock Parameter.

According to the third example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is third method of determination, processing unit can be determined in time parameter by third method of determination " burst arrival time ".

Specifically, in third example, receiving unit 1220 can receive third from the ownership-control plane network node Time parameter, wherein the third time parameter is based on the ownership-control plane network node belonging network external network System clock time parameter.Then, processing unit can determine that the second time joined according at least to the third time parameter Number, wherein second time parameter is the time based on the access-control plane network node belonging network system clock Parameter.For example, access-control plane network node can be according to the third time parameter and the ownership-control torus network The system clock of the external network of node belonging network and the access-control plane network node belonging network system clock it Between time difference, determine the second time parameter.

Access through this embodiment-control plane network node, access-control plane network node can be to ownership-controls Torus network node, which is sent, is used to indicate the information of the time parameter method of determination itself supported, and from ownership-control torus network Node receives the information for being used to indicate access-control plane network node time parameter method of determination to be used, to realize Control access-control plane network node time parameter method of determination to be used by ownership-control plane network node, into And make access-control plane network node and determine time parameter according to the time parameter method of determination, it is quasi- to be provided to RAN True time parameter is avoided due to the time difference between V-PLMN and H-PLMN or is used in same time zone different Master clock cause time drift and lead to " burst arrival time " inaccuracy in TSCAI.

Hereinafter, 3 describing ownership-control plane corresponding with method shown in Fig. 4 according to the embodiment of the present disclosure referring to Fig.1 Network node.Figure 13 is ownership-control plane network node 1300 structural schematic diagram according to the embodiment of the present disclosure.Due to returning Category-control plane network node 1300 function is identical as the details of method described above with reference to Fig. 4, therefore is herein For the sake of simplicity, omitting the detailed description to identical content.As shown in figure 13, ownership-control plane network node 1300 includes: to connect Unit 1310 is received, is configured as receiving the first information from access-control plane network node, wherein described in first information instruction The time parameter method of determination that access-control plane network node is supported；And transmission unit 1320, it is configured as to the visit - control plane network node the second information of transmission is asked, wherein second information indicates that the access-control plane network node will The time parameter method of determination used.Other than the two units, ownership-control plane network node 1300 can also include it His component, however, omitting its diagram and description herein since these components are unrelated with the content of the embodiment of the present disclosure.

In the disclosure, the time parameter method of determination that access-control plane network node is supported can have one or more. For example, access-the time parameter method of determination supported of control plane network node can there are three types of, respectively the first method of determination, Second method of determination and third method of determination.Specifically, the first method of determination be with can referring to access-control plane network node portion Time parameter is determined by ownership-control plane network node, the second method of determination can refer to that access-control plane network node is complete Time parameter is determined by ownership-control plane network node entirely, third method of determination can refer to access-control torus network section Point does not determine time parameter by ownership-control plane network node.

In the disclosure, ownership-control plane network node can be determined according to the received first information of receiving unit 1310 The time parameter method of determination that access-control plane network node is supported, and the time ginseng supported from access-control plane network node It is selected in number method of determination a kind of as access-control plane network node time parameter method of determination to be used.Then, return Category-control plane network node can send the second information by transmission unit 1320 to notify access-control plane network node.

" time parameter " as described herein can be based on the access-control plane network node belonging network (i.e. VPLMN the TSC auxiliary information (TSC Assistance Information, TSCAI) of system clock).TSCAI may include Indicate the information in direction (for example, uplink or downlink) of TSC business, in TSC business the transmission cycle of data and It happens suddenly in TSC business one or more of arrival time (Burst Arrival time) etc..Hereinafter, for convenience, Access-control plane network node is known as " when second by the time parameter of identified time parameter method of determination determination Between parameter ".

According to the first example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the first method of determination, when transmission unit 1320 can send first to access-control plane network node Between parameter, wherein the first time parameter is based on the ownership-control plane network node belonging network system clock Time parameter.Correspondingly, access-control plane network node determines the second time parameter according at least to the first time parameter, Wherein second time parameter is the time ginseng based on the access-control plane network node belonging network system clock Number.For example, access-control plane network node can be according to the first time parameter and the ownership-control torus network section Time difference between the system clock and the access-control plane network node belonging network system clock of point belonging network, Determine the second time parameter.

According to the second example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is the second method of determination, transmission unit 1320 can send the to the access-control plane network node Two time parameters, wherein when second time parameter is based on the access-control plane network node belonging network system The time parameter of clock.

According to the third example of the disclosure, when the second information indicates access-control plane network node time to be used When parameter method of determination is third method of determination, transmission unit 1320 can send the to the access-control plane network node Three time parameters, wherein the third time parameter is based on the ownership-control plane network node belonging network extranets The time parameter of the system clock of network.Correspondingly, access-control plane network node can be according at least to the third time parameter The second time parameter is determined, wherein second time parameter is based on the access-control plane network node belonging network The time parameter of system clock.For example, access-control plane network node can be according to the third time parameter and described Belonging to the system clock and the access-control plane network node of ownership-control plane network node belonging network external network Time difference between the system clock of network determines the second time parameter.

Ownership through this embodiment-control plane network node, ownership-control plane network node can be from access-controls Torus network node, which receives, is used to indicate the information of the time parameter method of determination that access-control plane network node is supported, and to Access-control plane network node transmission is used to indicate access-control plane network node time parameter method of determination to be used Information, control access-control plane network node time to be used to realize by ownership-control plane network node Parameter method of determination, so that access-control plane network node determines time parameter according to the time parameter method of determination, To provide correct time parameter to RAN, avoid due to the time difference between V-PLMN and H-PLMN or even if same In time zone but time drift is caused using different master clocks and leads to " burst arrival time " inaccuracy in TSCAI.

In addition, according to the equipment of the embodiment of the present disclosure (for example, terminal, access-control plane network node, ownership-control plane Network node etc.) it can also be realized by means of calculating the framework of equipment shown in Figure 14.Figure 14 shows the calculating equipment Framework.As shown in figure 14, calculating equipment 1400 may include bus 1410, one or more CPU 1420, read-only memory (ROM) 1430, random access memory (RAM) 1440, the communication port 1450 for being connected to network, input output assembly 1460, Hard disk 1470 etc..The storage equipment in equipment 1400 is calculated, such as ROM 1430 or hard disk 1470 can store computer disposal And/or communicate program instruction performed by the various data used or file and CPU.Calculating equipment 1400 can also include using Family interface 1480.Certainly, framework shown in Figure 14 is only exemplary, according to actual needs, can when realizing different equipment To omit one or more components in the calculating equipment shown in Figure 14.

Embodiment of the disclosure also may be implemented as computer readable storage medium.According to the calculating of the embodiment of the present disclosure Computer-readable instruction is stored on machine readable storage medium storing program for executing.It, can be with when the computer-readable instruction is run by processor Execute the method according to the embodiment of the present disclosure referring to the figures above description.The computer readable storage medium includes but unlimited In such as volatile memory and/or nonvolatile memory.The volatile memory for example may include that arbitrary access is deposited Reservoir (RAM) and/or cache memory (cache) etc..The nonvolatile memory for example may include read-only storage Device (ROM), hard disk, flash memory etc..

It will be appreciated by those skilled in the art that a variety of variations and modifications can occur in content disclosed by the disclosure.For example, Various equipment described above or component can also pass through one in software, firmware or three by hardware realization A little or whole combinations is realized.

In addition, as shown in the disclosure and claims, unless context clearly prompts exceptional situation, " one ", " one It is a ", the words such as "an" and/or "the" not refer in particular to odd number, may also comprise plural number." first ", " second " used in the disclosure And similar word is not offered as any sequence, quantity or importance, and be used only to distinguish different component parts.Together The similar word such as sample, " comprising " or "comprising" means to occur after element or object before the word cover and appear in the word The element that face is enumerated perhaps object and its equivalent and be not excluded for other elements or object." connection " or " connected " etc. are similar Word be not limited to physics or mechanical connection, but may include electrical connection, either it is direct still Indirectly.

In addition, flow chart has been used to be used to illustrate behaviour performed by system according to an embodiment of the present disclosure in the disclosure Make.It should be understood that front or following operate not necessarily accurately carry out in sequence.On the contrary, can according to inverted order or Various steps are handled simultaneously.It is also possible to during other operations are added to these, or from these processes remove a certain step Or number step operation.

Unless otherwise defined, all terms (including technical and scientific term) used herein have leads with belonging to the present invention The identical meanings that the those of ordinary skill in domain is commonly understood by.It is also understood that those of definition term such as in usual dictionary The meaning consistent with their meanings in the context of the relevant technologies should be interpreted as having, without application idealization or The meaning of extremely formalization explains, unless being clearly defined herein.

The disclosure is described in detail above, but it will be apparent to a person skilled in the art that the disclosure not limits The fixed embodiment illustrated in this manual.The disclosure is not departing from the disclosure determined by the record of claims Under the premise of objective and range, modifications and changes mode can be used as to implement.Therefore, the record of this specification is said with example For the purpose of bright, for purposes of this disclosure not with the meaning of any restrictions.