method and equipment for carrying out IMS service registration

文档序号：1711823 发布日期：2019-12-13 浏览：13次中文

阅读说明：本技术 一种进行ims业务注册的方法和设备 (method and equipment for carrying out IMS service registration ) 是由姜怡于 2018-06-06 设计创作，主要内容包括：本发明实施例公开了一种进行IMS业务注册的方法和设备,用以解决5G场景下终端进行IMS网络切片注册失败概率高的问题。本发明实施例在进行IMS业务注册时,首先终端向网络侧发送PDU session建立请求,然后终端根据预先设定的5G切片和IMS切片的映射关系及返回的IMS切片信息,确定注册的5G切片和IMS切片；最后终端通过确定的5G切片向确定的IMS切片进行IMS业务注册。此方法通过5G切片和IMS切片的映射关系,确定注册的5G切片和IMS切片,保证了终端不会因为IMS切片和5G切片不对应而出现注册失败,降低了5G场景下终端进行IMS网络切片注册失败的概率。(The embodiment of the invention discloses a method and equipment for carrying out IMS service registration, which are used for solving the problem of high failure probability of carrying out IMS network slice registration by a terminal under a 5G scene. When IMS service registration is carried out, firstly, a terminal sends a PDU session establishment request to a network side, and then the terminal determines the registered 5G slice and the registered IMS slice according to the preset mapping relation between the 5G slice and the IMS slice and the returned IMS slice information; and finally, the terminal performs IMS service registration to the determined IMS slice through the determined 5G slice. According to the method, the registered 5G slice and the registered IMS slice are determined through the mapping relation between the 5G slice and the IMS slice, so that the condition that the terminal fails to register because the IMS slice and the 5G slice do not correspond to each other is guaranteed, and the probability of failure of the terminal in registering the IMS network slice in a 5G scene is reduced.)

1. A method for performing registration of a multimedia subsystem IMS service, the method comprising:

The terminal sends a PDU session establishment request to the network side;

the terminal determines a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and at least one piece of IMS slice information returned by the network side;

And the terminal registers the IMS service to a proxy call session control function (P-CSCF) entity corresponding to the determined IMS slice through the determined 5G slice.

2. The method of claim 1, wherein the terminal accesses one 5G slice;

the terminal sends a PDU session establishment request to a network side, and the PDU session establishment request comprises the following steps:

and the terminal sends a PDU session establishment request to a Session Management Function (SMF) entity.

3. the method of claim 2, wherein the terminal determines the 5G slice and the IMS slice for registration according to a mapping relationship between the preset 5G slice and the IMS slice and at least one piece of IMS slice information received from the network side, and the method includes:

if the SMF entity returns a plurality of pieces of IMS slice information, the terminal determines at least one IMS slice corresponding to the 5G slice accessed by the terminal in the plurality of pieces of IMS slice information returned by the SMF entity according to a preset mapping relation between the 5G slice and the IMS slice, takes the 5G slice accessed by the terminal as the 5G slice for registration use, and takes one IMS slice in the at least one determined IMS slice as the IMS slice for registration use; or

And if the SMF entity returns an IMS slice message, the terminal takes the 5G slice accessed by the terminal as a 5G slice for registration, and takes an IMS slice message returned by the SMF entity received by the terminal as an IMS slice for registration.

4. The method of claim 3, wherein the terminal performs IMS service registration with the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice, and the method comprises:

The terminal determines a P-CSCF entity address corresponding to an IMS slice used for registration according to the mapping relation between the IMS slice information returned by the SMF entity and the P-CSCF entity address;

and the terminal performs IMS service registration through the determined 5G slice and the P-CSCF entity address.

5. The method of claim 1, wherein the terminal accesses a plurality of 5G slices;

the terminal sends a PDU session establishment request to a network side, and the PDU session establishment request comprises the following steps:

and the terminal sends a PDU session establishment request according to the address of the P-CSCF entity acquired from the SMF entity.

6. The method of claim 5, wherein the terminal determines the 5G slice and the IMS slice for registration according to a mapping relationship between the preset 5G slice and the IMS slice and the received IMS slice information returned by the network side, and the method includes:

The terminal receives IMS slice information returned by the network side;

the terminal determines at least one 5G slice corresponding to the IMS slice information received in a plurality of 5G slices accessed by the terminal according to a preset mapping relation between the 5G slices and the IMS slices;

And the terminal takes the IMS slice information acquired by the terminal as an IMS slice for registration, and takes one 5G slice in the at least one determined 5G slice as a 5G slice for registration.

7. A method for performing IMS service registration, the method comprising:

After receiving a registration request sent by a terminal, a P-CSCF entity sends identification information of the terminal to a Policy and Charging Control (PCC) entity;

the P-CSCF entity determines an S-NSSAI corresponding to IMS slice information accessed by the terminal according to single-network-slice selection auxiliary information S-NSSAI returned by the policy and charging control PCC entity;

And the P-CSCF entity sends the S-NSSAI corresponding to the IMS slice information accessed by the terminal to a service session control function (S-CSCF) entity so that the S-CSCF entity informs the terminal of the IMS slice used for registration according to the received S-NSSAI.

8. The method of claim 7, wherein the P-CSCF entity determines the S-NSSAI corresponding to the IMS slice accessed by the terminal according to the S-NSSAI returned by the PCC entity, comprising:

The P-CSCF entity takes the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal; or

The P-CSCF entity judges whether the S-NSSAI returned by the PCC entity is the same as the S-NSSAI contained in the registration request, if so, the S-NSSAI contained in the registration request is used as the S-NSSAI corresponding to the IMS slice information accessed by the terminal; and if not, taking the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal.

9. A method for performing IMS service registration, the method comprising:

a PCC entity receives identification information of a terminal sent by a P-CSCF entity, wherein the identification information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal;

the PCC entity inquires a corresponding 5G core network element according to the identification information of the terminal to obtain S-NSSAI carried during registration, and determines the S-NSSAI corresponding to the received identification information of the terminal;

and the PCC entity sends the S-NSSAI to the P-CSCF entity so that the P-CSCF entity triggers the S-CSCF entity to inform a terminal of an IMS slice used for registration according to the received S-NSSAI.

10. a method for performing IMS service registration, the method comprising:

the S-CSCF entity sends the received S-NSSAI corresponding to the IMS slice information accessed by the terminal sent by the P-CSCF entity to the HSS entity;

And the S-CSCF entity sends the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to a terminal so that the terminal determines a 5G slice and an IMS slice for registration according to the received IMS slice information.

11. a method for performing IMS service registration, the method comprising:

a Home Subscriber Server (HSS) entity receives S-NSSAI corresponding to IMS slice information accessed by a terminal sent by an S-CSCF entity;

The HSS entity determines IMS slice information corresponding to the received S-CSCF entity according to the mapping relation between the S-NSSAI and the IMS slice;

And the HSS entity sends the determined IMS slice information to an S-CSCF entity so that the S-CSCF entity informs the terminal of determining a 5G slice and an IMS slice for registration according to the IMS slice information.

12. An apparatus for performing IMS service registration, comprising: a processor and a transceiver:

the processor is used for sending a PDU session establishment request to the network side through the transceiver; determining a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and at least one piece of IMS slice information returned by a network side; and performing IMS service registration to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

13. the device of claim 12, wherein the terminal accesses one 5G slice, and wherein the processor is further configured to:

and sending a PDU session establishment request to the SMF entity.

14. the device of claim 13, wherein the processor is specifically configured to:

if the SMF entity returns a plurality of pieces of IMS slice information, determining at least one IMS slice corresponding to a 5G slice accessed by the terminal in the plurality of pieces of IMS slice information returned by the SMF entity according to a preset mapping relation between the 5G slice and the IMS slice, taking the accessed 5G slice as a 5G slice for registration use, and taking one IMS slice in the at least one determined IMS slice as an IMS slice for registration use; or

And if the SMF entity returns an IMS slice message, taking the 5G slice accessed by the terminal as a 5G slice for registration, and taking the IMS slice message returned by the SMF entity as an IMS slice for registration.

15. The device of claim 14, wherein the processor is specifically configured to:

determining a P-CSCF entity address corresponding to an IMS slice used for registration according to the mapping relation between the IMS slice information returned by the SMF entity and the P-CSCF entity address; and performing IMS service registration through the determined 5G slice and the P-CSCF entity address.

16. The device of claim 12, wherein the terminal accesses a plurality of 5G slices, the processor being further configured to:

and sending a PDU session establishment request according to the address of the P-CSCF entity acquired from the SMF entity.

17. The device of claim 16, wherein the processor is specifically configured to:

receiving IMS slice information returned by a network side; determining at least one 5G slice corresponding to the IMS slice information received in the plurality of accessed 5G slices according to a preset mapping relation between the 5G slices and the IMS slices; and taking the obtained IMS slice information as an IMS slice for registration, and taking one 5G slice in the at least one determined 5G slice as a 5G slice for registration.

18. An apparatus for performing IMS service registration, comprising: a processor and a transceiver:

The processor is configured to send, by the transceiver, the identification information of the terminal to the PCC entity after receiving a registration request sent by the terminal; determining S-NSSAI corresponding to IMS slice information accessed by the terminal according to the S-NSSAI returned by the PCC entity; and sending the S-NSSAI corresponding to the IMS slice information accessed by the terminal to an S-CSCF entity so that the S-CSCF entity informs the terminal of the IMS slice used for registration according to the received S-NSSAI.

19. The device of claim 18, wherein the processor is specifically configured to:

taking the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal; or

judging whether the S-NSSAI returned by the PCC entity is the same as the S-NSSAI contained in the registration request, if so, taking the S-NSSAI contained in the registration request as the S-NSSAI corresponding to the IMS slice information accessed by the terminal; and if not, taking the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal.

20. An apparatus for performing IMS service registration, comprising: a processor and a transceiver:

The processor is configured to receive, by a transceiver, identification information of a terminal sent by a P-CSCF entity, where the identification information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal; inquiring a corresponding 5G core network element according to the identification information of the terminal to obtain S-NSSAI carried during registration, and determining the S-NSSAI corresponding to the received identification information of the terminal; and sending the S-NSSAI to the P-CSCF entity so that the P-CSCF entity triggers the S-CSCF entity to inform a terminal of an IMS slice used for registration according to the received S-NSSAI.

21. An apparatus for performing IMS service registration, the apparatus comprising: at least one processing unit and at least one memory unit, wherein the memory unit has stored program code which, when executed by the processing unit, causes the processing unit to carry out the steps of the method according to any one of claims 1 to 6 or the steps of the method according to any one of claims 7 to 8 or the steps of the method according to claim 9 or the steps of the method according to claim 10 or the steps of the method according to claim 11.

22. a computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6 or the steps of the method according to any one of claims 7 to 8 or the steps of the method according to claim 9 or the steps of the method according to claim 10 or the steps of the method according to claim 11.

Technical Field

The present invention relates to the technical field of core networks, and in particular, to a method and an apparatus for performing IMS service registration.

Background

With the development of technology, 4G (the 4 Generation mobile communication technology, fourth Generation communication technology) has gradually failed to meet the requirements of technology development, because 4G bandwidth is not large enough and latency is too long, and although it is enough to meet the daily Application (Application), it cannot face the future, so 5G (the 5 Generation mobile communication technology, fifth Generation communication technology) has been proposed.

However, in the development process of 5G, since IMS (IP Multimedia Subsystem) slices and 5G core network slices do not correspond to each other one by one, there are scenes in which a terminal accesses different IMS slices through one 5G core network slice or a terminal accesses the same IMS slice through a plurality of different 5G core network slices.

For a scenario that a terminal accesses different IMS slices through one 5G core network slice and a scenario that the terminal accesses the same IMS slice through a plurality of different 5G core network slices, if the IMS slice used for IMS network slice registration by the terminal and the 5G core network slice are not corresponding, IMS network slice registration failure of the terminal can be caused. However, there is no scheme for enabling the terminal to know the IMS slice used for IMS network slice registration and the corresponding 5G core network, so that the probability of failure of the terminal in IMS network slice registration is high.

In summary, the probability of failure of the terminal to perform IMS network slice registration in the current 5G scenario is high.

Disclosure of Invention

the embodiment of the invention provides a method and equipment for carrying out IMS service registration, which are used for solving the problem of high probability of failure in IMS network slice registration of a terminal in a 5G scene.

In a first aspect, a method for performing IMS service registration provided in an embodiment of the present invention includes:

firstly, a terminal sends a PDU session establishment request to a network side, then the terminal determines a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and at least one piece of IMS slice information returned by the network side, and finally the terminal registers IMS service to a P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

According to the method, after the terminal receives at least one piece of IMS slice information returned by the network side, the 5G slice and the IMS slice used for registration can be determined according to the preset mapping relation between the 5G slice and the IMS slice, so that the terminal can perform IMS service registration to a P-CSCF (Proxy-Call Session Control function) entity corresponding to the determined IMS slice through the determined 5G slice, and the 5G slice and the IMS slice used for registration are determined to be the corresponding 5G slice and the IMS slice according to the preset mapping relation between the 5G slice and the IMS slice, so that the situation that the terminal fails in registration due to the fact that the IMS slice does not correspond to the 5G core network slice can be ensured, and the probability that the terminal fails in IMS network slice registration in a 5G scene is reduced.

in a possible implementation manner, when the terminal accesses one 5G slice, the sending, by the terminal, a PDU session establishment request to a network side includes: the terminal sends a PDU Session establishment request to an SMF (Session Management Function).

in the method, when the terminal accesses a 5G slice, the PDU session establishment request is sent to the SMF through the terminal, so that IMS service registration is carried out.

In a possible implementation manner, the determining, by the terminal, a 5G slice and an IMS slice for registration according to a mapping relationship between a preset 5G slice and an IMS slice and at least one piece of IMS slice information returned by the network side includes: if the SMF returns a plurality of pieces of IMS slice information, the terminal determines at least one IMS slice corresponding to the 5G slice accessed by the terminal in the plurality of pieces of IMS slice information returned by the SMF according to a preset mapping relation between the 5G slice and the IMS slice, takes the 5G slice accessed by the terminal as a 5G slice for registration use, and takes one IMS slice in the at least one determined IMS slice as an IMS slice for registration use; or, if the SMF returns an IMS slice information, the terminal uses a 5G slice accessed by the terminal as a 5G slice for registration, and uses an IMS slice information returned by the terminal receiving the SMF as an IMS slice for registration.

according to the method, when the terminal is accessed to one 5G slice, the corresponding registration method is selected for registration according to the number of the IMS slices returned by the SMF, and when the number of the IMS slices returned by the SMF is one, the returned IMS slices are directly determined to be the IMS slices used for registration, the IMS slices are not required to be determined and selected according to the mapping relation between the 5G slices and the IMS slices, a more suitable solution is provided for different registration scenes, and the operation process and the system pressure are reduced.

In a possible implementation manner, the performing, by the terminal, IMS service registration with a P-CSCF corresponding to the determined IMS slice through the determined 5G slice includes: the terminal determines a P-CSCF address corresponding to an IMS slice used for registration according to the mapping relation between the IMS slice information returned by the SMF and the P-CSCF address; and the terminal performs IMS service registration through the determined 5G slice and the P-CSCF address.

in the method, when the terminal performs IMS service registration to the determined IMS slice through the determined 5G slice, because the P-CSCFs of different IMS networks are different, when performing IMS registration, the terminal needs to acquire the P-CSCF addresses of different IMS networks according to different service requirements, register to different IMS networks, that is, the corresponding P-CSCF address of IMS slice when registering is needed to be determined, the SMF of the invention stores the mapping relation between the IMS slice information and the P-CSCF address, when the terminal registers the service to the IMS slice through the 5G slice, the terminal can determine the P-CSCF address corresponding to the IMS slice used for registration according to the mapping relation between the IMS slice information returned by the SMF and the P-CSCF address, so that the terminal registers the IMS service through the determined 5G slice and the P-CSCF address.

In one possible implementation, the terminal accesses a plurality of 5G slices; the terminal sends a PDU session establishment request to a network side, and the PDU session establishment request comprises the following steps: and the terminal sends a PDU session establishment request according to the P-CSCF address acquired from the SMF.

According to the method, the terminal needs to determine the P-CSCF address corresponding to the IMS slice when the IMS is registered, the terminal can acquire the P-CSCF address from the SMF, and the IMS service registration is carried out by the terminal through the determined 5G slice and the P-CSCF address.

in a possible implementation manner, the determining, by the terminal, a 5G slice and an IMS slice for registration according to a mapping relationship between a preset 5G slice and an IMS slice and received IMS slice information returned by a network side includes: the terminal receives IMS slice information returned by the network side; the terminal determines at least one 5G slice corresponding to the IMS slice information received in a plurality of 5G slices accessed by the terminal according to a preset mapping relation between the 5G slices and the IMS slices; and the terminal takes the IMS slice information acquired by the terminal as an IMS slice for registration, and takes one 5G slice in the at least one determined 5G slice as a 5G slice for registration.

according to the method, the 5G slice and the IMS slice used for registration are determined according to the preset mapping relation between the 5G slice and the IMS slice, so that when the terminal performs registration under the 5G, the terminal can determine which 5G slice and the IMS slice are selected for registration, and IMS service registration under the 5G is realized.

in a second aspect, a method for performing IMS service registration provided in an embodiment of the present invention includes:

Firstly, after receiving a registration request sent by a terminal, a P-CSCF entity sends identification information of the terminal to a PCC (Policy and Charging Control) entity; then the P-CSCF entity determines the S-NSSAI corresponding to the IMS Slice Information accessed by the terminal according to the S-NSSAI (Single Network Slice Selection Assistant Information) returned by the PCC entity; and finally, the P-CSCF entity sends the S-NSSAI corresponding to the IMS slice information accessed by the terminal to an S-CSCF (Serving Call Session control Function) entity so that the S-CSCF entity informs the terminal of the IMS slice used for registration according to the received S-NSSAI.

According to the method, when the terminal sends the PDU session establishment request, the P-CSCF entity obtains the S-NSSAI carried by the registration information after receiving the registration request sent by the terminal and sends the S-CSCF entity, so that when the terminal registers the service to the IMS slice through the 5G slice, the terminal can determine the IMS slice used for registration according to the S-NSSAI, and the IMS service registration is realized.

In a third aspect, a method for performing IMS service registration provided in an embodiment of the present invention includes:

firstly, a PCC entity receives identification information of a terminal sent by a P-CSCF entity, wherein the identification information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal; then, the PCC entity inquires the corresponding 5G core network element according to the identification information of the terminal to obtain the S-NSSAI carried during registration, and determines the S-NSSAI corresponding to the received identification information of the terminal; and finally, the PCC entity sends the S-NSSAI to the P-CSCF entity so that the P-CSCF entity triggers the S-CSCF entity to inform a terminal of an IMS slice used for registration according to the received S-NSSAI.

According to the method, as a plurality of terminals may initiate IMS service registration at the same time, at this time, when the terminal sends a PDU session establishment request, the PCC entity can determine the specific terminal for performing IMS service registration according to the received identification information of the terminal sent by the P-CSCF entity, so that the subsequent steps are realized, and the problem that when a plurality of terminals initiate IMS service registration at the same time, the terminals for performing IMS service registration cannot be in one-to-one correspondence is avoided, so that IMS service registration fails.

In a fourth aspect, a method for performing IMS service registration provided in an embodiment of the present invention includes:

Firstly, an S-CSCF entity sends S-NSSAI corresponding to IMS slice information of terminal access sent by a P-CSCF entity to an HSS (Home Subscriber Server) entity; and then the S-CSCF entity sends the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to a terminal so that the terminal determines a 5G slice and an IMS slice for registration according to the received IMS slice information.

In the method, when a terminal sends a PDU session establishment request, an S-CSCF entity sends S-NSSAI corresponding to IMS slice information of terminal access sent by a P-CSCF entity to an HSS entity, the S-CSCF entity sends the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to the terminal, so that when the terminal registers the service to an IMS slice through a 5G slice, the terminal can determine the IMS slice used for registration according to the S-NSSAI, and the terminal determines the 5G slice used for registration according to the IMS slice determined for registration, thereby realizing IMS service registration.

In a fifth aspect, a method for performing IMS service registration provided in the embodiment of the present invention includes:

firstly, an HSS entity receives S-NSSAI corresponding to IMS slice information accessed by a terminal sent by an S-CSCF entity; then the HSS entity determines IMS slice information corresponding to the received S-CSCF entity according to the mapping relation between the S-NSSAI and the IMS slice; and finally, the HSS entity sends the determined IMS slice information to an S-CSCF entity so that the S-CSCF entity informs the terminal of determining a 5G slice and an IMS slice for registration according to the IMS slice information.

in the method, when a terminal sends a PDU session establishment request, an HSS entity determines IMS slice information corresponding to a received S-CSCF entity according to a mapping relation between S-NSSAI and an IMS slice, the HSS entity sends the determined IMS slice information to the S-CSCF entity, so that when the terminal registers services to the IMS slice through a 5G slice, the terminal can determine the IMS slice for registration according to the S-NSSAI, and then the terminal determines the 5G slice for registration according to the determined IMS slice for registration, thereby realizing IMS service registration.

In a sixth aspect, an embodiment of the present invention provides a terminal for performing IMS service registration, where the terminal includes: a processor and a transceiver:

In a seventh aspect, an embodiment of the present invention provides a P-CSCF entity for performing IMS service registration, including: a processor and a transceiver:

the processor is configured to send, by the transceiver, the identification information of the terminal to the PCC entity after receiving a registration request sent by the terminal; determining S-NSSAI corresponding to IMS slice information accessed by the terminal according to the S-NSSAI returned by the PCC entity; and sending the S-NSSAI corresponding to the IMS slice information accessed by the terminal to an S-CSCF entity so that the S-CSCF entity informs the terminal of the IMS slice used for registration according to the received S-NSSAI.

In an eighth aspect, an embodiment of the present invention provides a PCC entity for performing IMS service registration, where the PCC entity includes: a processor and a transceiver:

in a ninth aspect, an embodiment of the present invention provides an S-CSCF entity for performing IMS service registration, including: a processor and a transceiver:

the processor is used for sending the received S-NSSAI corresponding to the IMS slice information accessed by the terminal sent by the P-CSCF entity to the HSS entity through the transceiver; and sending the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to a terminal, so that the terminal determines a 5G slice and an IMS slice for registration according to the received IMS slice information.

In a tenth aspect, an embodiment of the present invention provides an HSS entity for performing IMS service registration, where the HSS entity includes: a processor and a transceiver:

the processor is used for receiving S-NSSAI corresponding to IMS slice information accessed by a terminal and sent by an S-CSCF entity through the transceiver; determining IMS slice information corresponding to the received S-CSCF entity according to the mapping relation between the S-NSSAI and the IMS slice; and sending the determined IMS slice information to an S-CSCF entity so that the S-CSCF entity informs the terminal of determining a 5G slice and an IMS slice for registration according to the IMS slice information.

in an eleventh aspect, an embodiment of the present invention further provides an apparatus for performing IMS service registration, where the apparatus includes:

at least one processing unit and at least one memory unit, wherein the memory unit has stored program code which, when executed by the processing unit, causes the processing unit to perform the functions of the embodiments of the first aspect described above.

in a twelfth aspect, an embodiment of the present invention further provides an apparatus for performing IMS service registration, where the apparatus includes:

At least one processing unit and at least one memory unit, wherein the memory unit has stored program code which, when executed by the processing unit, causes the processing unit to perform the functions of the embodiments of the first aspect described above.

In a thirteenth aspect, an embodiment of the present invention further provides an apparatus for performing IMS service registration, where the apparatus includes:

In a fourteenth aspect, an embodiment of the present invention further provides an apparatus for performing IMS service registration, where the apparatus includes:

in a fifteenth aspect, an embodiment of the present invention further provides an apparatus for performing IMS service registration, where the apparatus includes:

In a sixteenth aspect, a computer-storable medium has stored thereon a computer program which, when being executed by a processor, realizes the steps of the above-mentioned method.

In a seventeenth aspect, the present application further provides a computer storage medium having a computer program stored thereon, which when executed by a processor, performs the steps of the method of any one of the first to fifth aspects.

In addition, for technical effects brought by any one implementation manner of the sixth aspect to the seventeenth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect to the fifth aspect, and details are not repeated here.

drawings

in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a system for performing IMS service registration according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a scenario according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a second scenario of the present invention;

Fig. 4 is a schematic flow chart of a method for a terminal to access different IMS slices for service registration through one 5G slice in the embodiment of the present invention;

fig. 5 is a flowchart illustrating a method for a terminal to access the same IMS slice through multiple 5G slices to perform service registration in the embodiment of the present invention;

Fig. 6 is a schematic structural diagram of an apparatus for performing IMS service registration by a first terminal according to an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of an apparatus for performing IMS service registration by a second terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first P-CSCF entity according to an embodiment of the present invention;

fig. 9 is a schematic device structure diagram of a second P-CSCF entity according to the embodiment of the present invention;

fig. 10 is a schematic device structure diagram of a first PCC entity according to an embodiment of the present invention;

Fig. 11 is a schematic device structure diagram of a second PCC entity according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an apparatus of a first S-CSCF entity according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of an apparatus of a second S-CSCF entity according to the embodiment of the present invention;

Fig. 14 is a schematic device structure diagram of a first HSS entity according to the embodiment of the present invention;

fig. 15 is a schematic device structure diagram of a second HSS entity according to the embodiment of the present invention;

fig. 16 is a flowchart illustrating a method for performing IMS service registration by a P-CSCF entity according to an embodiment of the present invention;

Fig. 17 is a flowchart illustrating a method for performing IMS service registration by a PCC entity according to an embodiment of the present invention;

fig. 18 is a flowchart illustrating a method for performing IMS service registration by an S-CSCF entity according to an embodiment of the present invention;

fig. 19 is a flowchart illustrating a method for performing IMS service registration by an HSS entity according to an embodiment of the present invention.

Detailed Description

in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the embodiments of the present invention.

Some of the words that appear in the text are explained below:

(1) In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(2) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

(3) the terminal referred in the embodiment of the invention refers to a terminal capable of supporting the method technology for performing IMS service registration.

(4) the slicing referred to in the embodiment of the present invention is to cut a physical network into a plurality of virtual end-to-end networks, and each virtual network, including devices, access networks, transport networks and core networks in the network, is logically independent, and any virtual network fails without affecting other virtual networks. Each virtual network has different functional characteristics and is oriented to different requirements and services;

(5) The "P-CSCF entity" referred to in the embodiments of the present invention refers to a proxy call session control function, the P-CSCF entity is the first contact node (in the signaling plane) of a user in the IMS, and from the SIP perspective, it is an outbound/inbound SIP proxy server, and all SIP signaling, whether from a user equipment (terminal) or sent to the terminal, must pass through the P-CSCF entity. The terminal may obtain the address of the P-CSCF entity using the local CSCF discovery mechanism. The P-CSCF entity is responsible for validating the request, forwarding it to the specified target, and processing and forwarding the response;

(6) the S-CSCF entity referred in the embodiment of the invention means that the S-CSCF entity is the core of the IMS, is positioned in the home network, performs session control and registration request for the terminal, but when the terminal is in the session, the S-CSCF entity processes the session state in the network;

(7) The HSS entity in the embodiment of the present invention refers to a Home Subscriber Server (HSS entity) which is a concept proposed by 3GPP when R5 introduces IMS, and has a function similar to that of HLR but stronger, supports more interfaces, and can process more user information;

(8) The IMS (IP Multimedia system) in the embodiment of the present invention is a brand new Multimedia service format, and can meet the requirements of the current terminal client for more novel and diversified Multimedia services.

(9) The 'S-NSSAI' referred to in the embodiments of the present invention refers to a slice selection assistance information unique identifier, and one S-NSSAI is composed of two parts, a slice/service type and a slice differentiation identifier, where the slice type indicates a network slice behavior expected in terms of characteristics and services, and the slice differentiation identifier is used to supplement network slice differentiation information among a plurality of network slices having the same slice/service type.

(10) the PCC referred to in the embodiments of the present invention is policy and charging control, and has a main function of providing functions such as policy control, charging control, event reporting of service data flows, and the like.

as shown in fig. 1, an embodiment of the present invention provides a system for performing IMS service registration, where the system includes:

A terminal 100, configured to send a PDU session establishment request to a network side; determining a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and at least one piece of IMS slice information returned by a network side; performing IMS service registration to a P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice;

The network side equipment 101 is used for returning at least one piece of IMS slice information to the terminal according to the received PDU session establishment request sent by the terminal;

And the P-CSCF entity 102 is configured to perform IMS service registration for the terminal.

In the embodiment of the invention, when a terminal registers an IMS service, the terminal firstly sends a PDU session establishment request to a network side, and the terminal determines a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and at least one piece of IMS slice information returned by the network side; the terminal registers the IMS service to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice, determines the 5G slice and the IMS slice used for registration according to the preset mapping relation between the 5G slice and the IMS slice, and registers according to the P-CSCF entity corresponding to the IMS slice, so that when the terminal registers under the 5G, which 5G slice and the IMS slice are selected for registration can be determined, and the IMS service registration under the 5G is realized.

since the IMS slice type and the 5G core network slice type are not in one-to-one correspondence, there are scenarios in which a terminal accesses different IMS slices through one 5G slice, or a terminal accesses the same IMS slice through a plurality of different 5G slices.

In the first scenario, a terminal accesses different IMS slices through one 5G slice.

as shown in fig. 2, an embodiment of the present invention provides a system for performing IMS service registration, where the system includes:

a terminal 200, configured to send an establishment request to an SMF entity; receiving a P-CSCF entity address corresponding to the accessed IMS slice returned by the SMF entity; determining a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and received IMS slice information returned by the SMF entity; and performing IMS service registration through the determined 5G slice and the determined P-CSCF entity address corresponding to the IMS slice.

and the SMF entity 201 is used for returning the IMS slice information, determining a P-CSCF entity address corresponding to the IMS slice accessed by the terminal according to the mapping relation between the IMS slice information and the P-CSCF entity address, and returning the P-CSCF entity address corresponding to the IMS slice accessed by the terminal to the terminal.

after receiving at least one piece of IMS slice information returned by a network side, the terminal of the embodiment of the invention can determine the 5G slice and the IMS slice for registration according to the preset mapping relation between the 5G slice and the IMS slice, so that the terminal can register the IMS service to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice, and the 5G slice and the IMS slice for registration are determined to be the corresponding 5G slice and the IMS slice according to the preset mapping relation between the 5G slice and the IMS slice, thereby ensuring that the terminal cannot have the registration failure condition caused by the non-correspondence between the IMS slice and the 5G core network slice, and reducing the probability of the IMS network slice registration failure of the terminal under the 5G scene.

Wherein the IMS slices include, but are not limited to, some or all of:

A call service IMS slice, a conference service IMS slice, an unmanned service IMS slice, and a V2x service IMS slice.

If a terminal accesses a plurality of IMS slices, the terminal cannot know the P-CSCF address corresponding to each accessed IMS slice, and in order to determine the P-CSCF addresses corresponding to different accessed IMS slices, the terminal sends a PDU session establishment request to an SMF entity, wherein the establishment request carries information of a plurality of IMS slices accessed by the terminal;

Correspondingly, the SMF entity receives the PDU session establishment request and acquires IMS slice information accessed by the terminal carried in the establishment request;

the SMF determines a P-CSCF entity address corresponding to an IMS slice accessed by the terminal according to the mapping relation between the IMS slice information and the P-CSCF entity address through the acquired information;

And the SMF returns the P-CSCF entity address corresponding to the IMS slice accessed by the terminal to the terminal.

The specific processing modes of the terminal are different according to the number of IMS slices returned by the SMF entity, which are listed below.

Case 1, the SMF entity returns a plurality of IMS slice information.

Optionally, the terminal determines, according to a preset mapping relationship between the 5G slice and the IMS slice, at least one IMS slice corresponding to the 5G slice accessed by the terminal in the plurality of pieces of IMS slice information returned by the SMF entity, takes the 5G slice accessed by the terminal as the 5G slice for registration, and takes one IMS slice of the at least one IMS slice as the IMS slice for registration.

the method comprises the steps that a terminal is supposed to be accessed into different IMS slices through a 5G slice, and the attribute of the 5G slice accessed by the terminal is a low-delay 5G slice;

the terminal sends a PDU session establishment request to the SMF entity;

the SMF entity receives a PDU session establishment request and acquires a plurality of IMS slices accessed by the terminal carried in the establishment request;

According to the obtained information, the SMF determines P-CSCF entity addresses corresponding to a plurality of IMS slices accessed by the terminal according to the mapping relation between the IMS slice information and the P-CSCF entity addresses, and returns the P-CSCF entity addresses corresponding to the plurality of IMS slices accessed by the terminal to the terminal;

the terminal can determine that the IMS slices suitable for the currently accessed 5G slice to be accessed are the unmanned service IMS slice, the V2x service IMS slice, and the intelligent manufacturing service IMS slice according to the mapping relationship between the 5G slice and the IMS slice (see table 1) and the IMS slice information returned by the SMF entity.

at this time, the terminal randomly selects one IMS slice as a registration used IMS slice from a plurality of IMS slices conforming to the registration service. It should be noted that the above random selection is merely an example, and any method capable of selecting an IMS slice for registration is applicable to the embodiment of the present invention.

TABLE 15G slice to IMS slice mapping relationship

And after determining the IMS slice used for registration, the terminal takes the accessed 5G slice as the 5G slice used for registration determination, and performs IMS service registration to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

Case 2, the SMF entity returns an IMS slice message.

optionally, the terminal uses a 5G slice accessed by the terminal as a 5G slice for registration, and uses an IMS slice information returned by the SMF entity received by the terminal as an IMS slice for registration.

For example, the terminal accesses an IMS slice through the 5G slice, the 5G slice accessed by the terminal is a low-latency 5G slice, and the accessed IMS slice is an unmanned service IMS slice;

the terminal sends a PDU session establishment request to the SMF entity;

the SMF entity receives a PDU session establishment request and acquires an unmanned service IMS slice accessed by a terminal carried in the establishment request;

determining a P-CSCF entity address corresponding to an unmanned service IMS slice accessed by a terminal according to the obtained information and the mapping relation between the IMS slice information and the P-CSCF entity address, and returning the P-CSCF entity address corresponding to the unmanned service IMS slice accessed by the terminal to the terminal;

and finally, performing IMS service registration on a P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

According to the two methods, when the terminal is accessed to one 5G slice, the corresponding registration method is selected for registration according to the number of the IMS slices returned by the SMF entity, and when the number of the IMS slices returned by the SMF entity is one, the returned IMS slices are directly determined to be the IMS slices used for registration, the IMS slices are not required to be determined and selected according to the mapping relation between the 5G slices and the IMS slices, a more suitable solution is provided for different registration scenes, and the operation process and the system pressure are reduced.

In the foregoing cases 1 and 2, when the terminal performs IMS service registration on a certain IMS slice through the determined 5G slice, because P-CSCF entities of different IMS slices are different, the terminal needs to acquire P-CSCF entity addresses of different IMS slices according to different service requirements when performing IMS registration, and register the P-CSCF entity addresses to different IMS slices, that is, the P-CSCF entity addresses corresponding to the IMS slices when performing registration need to be determined, and to address this problem, the following solutions are adopted in the embodiments of the present invention:

Optionally, the terminal determines a P-CSCF entity address corresponding to an IMS slice used for registration according to a mapping relationship between IMS slice information returned by the SMF entity and the P-CSCF entity address;

and the terminal performs IMS service registration through the determined 5G slice, the IMS slice used for registration and the P-CSCF address corresponding to the IMS slice.

And assuming that the terminal finally determines the IMS slice for registration as the unmanned service IMS slice. As shown in table 2, the terminal determines, according to the mapping relationship between the IMS slice information returned by the SMF entity and the P-CSCF entity address, that the P-CSCF entity address corresponding to the driverless service IMS slice used for registration is 333, and the terminal performs IMS service registration through the determined 5G slice and the P-CSCF entity address 333.

TABLE 2 mapping relationship between IMS slice and P-CSCF entity address

In the method, when the terminal performs IMS service registration to the determined IMS slice through the determined 5G slice, because the P-CSCF addresses of different IMS slices are different, the terminal needs to acquire the P-CSCF addresses of different IMS slices according to different service requirements when performing IMS registration and register the P-CSCF addresses to different IMS slices, namely the P-CSCF addresses corresponding to the IMS slices when performing registration are all required to be determined.

And in the second scenario, the terminal accesses the same IMS slice scenario through a plurality of different 5G slices.

As shown in fig. 3, an embodiment of the present invention provides a system for performing IMS service registration, where the system includes:

the terminal 300 is configured to send a PDU session establishment request to a P-CSCF entity; determining a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and an IMS slice information returned by the received S-CSCF; and performing IMS service registration to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

a P-CSCF entity 301, configured to send, after receiving a registration request sent by a terminal, identification information of the terminal to a PCC entity; determining S-NSSAI corresponding to IMS slice information accessed by the terminal according to the S-NSSAI returned by the PCC entity; and sending the S-NSSAI corresponding to the IMS slice information accessed by the terminal to an S-CSCF entity so that the S-CSCF entity informs the terminal of the IMS slice used for registration according to the received S-NSSAI.

A PCC entity 302, configured to receive identifier information of a terminal sent by a P-CSCF entity, where the identifier information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal; inquiring a corresponding 5G core network element according to the identification information of the terminal to obtain S-NSSAI carried during registration, and determining the S-NSSAI corresponding to the received identification information of the terminal; and sending the S-NSSAI to the P-CSCF entity so that the P-CSCF entity triggers the S-CSCF entity to inform a terminal of an IMS slice used for registration according to the received S-NSSAI.

The S-CSCF entity 303 is configured to send the S-NSSAI corresponding to the IMS slice information of the terminal access sent by the P-CSCF entity to the HSS entity; and sending the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to a terminal, so that the terminal determines a 5G slice and an IMS slice for registration according to the received IMS slice information.

the HSS entity 304 is configured to receive an S-NSSAI corresponding to IMS slice information of a terminal access sent by an S-CSCF entity; determining IMS slice information corresponding to the received S-CSCF entity according to the mapping relation between the S-NSSAI and the IMS slice; and sending the determined IMS slice information to an S-CSCF entity so that the S-CSCF entity informs the terminal of determining a 5G slice and an IMS slice for registration according to the IMS slice information.

The method comprises the steps that a terminal is supposed to be accessed into an IMS slice through a plurality of 5G slices, and the IMS slice accessed into the terminal is an agricultural service IMS slice;

step 1: the terminal sends a PDU session establishment request to a P-CSCF entity;

Step 2: after receiving a registration request sent by a terminal, a P-CSCF entity sends identification information of the terminal (e.g., terminal identification information: ID123) to a PCC entity.

The identification information of the terminal mainly refers to the identity of the terminal and is used for distinguishing the terminal initiating the IMS service registration. It should be noted that the terminal ID identification information is only an example, and any manner capable of distinguishing terminals is applicable to the embodiment of the present invention.

And step 3: after receiving the identification information of the terminal sent by the P-CSCF entity, the PCC entity queries the corresponding 5G core network element according to the received identification information of the terminal to obtain the S-NSSAI carried during registration, and sends the S-NSSAI to the P-CSCF entity.

For example, the PCC entity receives the ID123 identification information sent by the P-CSCF entity, queries the corresponding terminal performing registration to the corresponding 5G core network element according to the ID123 identification information, and obtains the S-NSSAI carried when the corresponding terminal registers from the 5G core network element query, and then the PCC entity sends the S-NSSAI obtained by the query to the P-CSCF entity. The PCC not only successfully obtains the S-NSSAI carried by the registration information, but also avoids the problem that when a plurality of terminals initiate IMS service registration simultaneously, the terminals which can not carry out IMS service registration one by one, so that the IMS service registration fails.

and 4, step 4: and the P-CSCF entity determines the S-NSSAI corresponding to the IMS slice information accessed by the terminal according to the S-NSSAI returned by the PCC entity, and sends the S-NSSAI corresponding to the IMS slice information accessed by the terminal to the S-CSCF entity.

in this step, the P-CSCF entity determines, according to the S-NSSAI returned by the PCC entity, the S-NSSAI corresponding to the IMS slice to which the terminal accesses, which may be divided into two cases, which are listed below:

Determination of S-NSSAI method 1: the P-CSCF entity takes the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal;

For example, the S-NSSAI returned by the PCC entity is (a, B, C), and because the S-NSSAI returned by the PCC entity is always correct, the P-CSCF entity does not check the S-NSSAI carried by the terminal, and directly uses the S-NSSAI (a, B, C) returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal, thereby determining the IMS slice used for service registration.

Determination of S-NSSAI method 2: the P-CSCF entity judges whether the S-NSSAI returned by the PCC entity is the same as the S-NSSAI contained in the registration request, if so, the S-NSSAI contained in the registration request is used as the S-NSSAI corresponding to the IMS slice information accessed by the terminal; and if not, taking the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal.

Such as: and the S-NSSAI returned by the PCC entity is (A, B, C), and the P-CSCF entity checks the S-NSSAI carried by the terminal according to the S-NSSAI information returned by the PCC entity.

And assuming that the S-NSSAI carried by the terminal is (A, B, C) consistent with the S-NSSAI (A, B, C) returned by the PCC entity, taking the S-NSSAI (A, B, C) of the terminal as the S-NSSAI corresponding to the IMS slice information accessed by the terminal, and determining the IMS slice used for service registration according to the determined S-NSSAI information.

And assuming that the S-NSSAI carried by the terminal is (A, B, D) inconsistent with the S-NSSAI (A, B, C) information returned by the PCC entity, taking the S-NSSAI (A, B, D) returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal, and determining the IMS slice used for service registration according to the determined S-NSSAI information.

In this step, the P-CSCF entity may directly replace the S-NSSAI carried by the acquired registration information with the S-NSSAI returned by the PCC entity according to actual needs, or the P-CSCF entity checks the S-NSSAI carried by the acquired registration information and determines whether to replace the S-NSSAI, where it is determined that the comparison step is relatively reduced in the S-NSSAI method 1, and it is determined that the number of times of replacement is relatively reduced in the S-NSSAI method 2, and two different schemes are adopted, which may be selected according to actual needs, and have a stronger applicability.

And 5: and the S-CSCF entity sends the S-NSSAI corresponding to the IMS slice information of the terminal access sent by the P-CSCF entity to the HSS entity.

For example, the P-CSCF entity sends S-NSSAI (a, B, C) to the S-CSCF entity, and the S-CSCF entity sends S-NSSAI (a, B, C) corresponding to IMS slice information of terminal access sent by the P-CSCF entity to the HSS entity.

step 6: the HSS entity receives S-NSSAI corresponding to IMS slice information accessed by a terminal sent by the S-CSCF entity, determines the received IMS slice information corresponding to the S-CSCF entity as an agricultural service IMS slice according to the mapping relation between the S-NSSAI and the IMS slice, and sends the determined IMS slice information to the S-CSCF entity.

for example, the HSS entity receives S-NSSAI (a, B, C) corresponding to IMS slice information of terminal access sent by the S-CSCF entity, determines that the IMS slice of terminal access is an agricultural service IMS slice according to a mapping relationship between the S-NSSAI and the IMS slice (see table 3), and sends the determined IMS slice information to the S-CSCF entity.

S-NSSAI	IMS slices
		(A,B,C)	Agricultural business IMS slice
(D,B,C)	conference service IMS slice
		(A,E,C)	Intelligent manufacturing service IMS slice
(A,D,E)	unmanned service IMS slice
		(A,B,D)	IMS slice for building service

TABLE 3S-NSSAI and IMS slice correspondence table

and 7: and the S-CSCF entity sends the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to the terminal so that the terminal determines the accessed IMS slice as an agricultural service IMS slice according to the received IMS slice information.

such as: and the S-CSCF entity sends the IMS slice information of the IMS slice agricultural service corresponding to the S-NSSAI returned by the HSS entity to a terminal.

The terminal acquires information sent by the S-CSCF, the agricultural service IMS slice is used as the IMS slice for registration, and the terminal determines that the 5G slice for registration is the large-scale Internet of things 5G slice according to the agricultural service IMS slice for service registration and the mapping relation between the 5G slice and the IMS slice (see table 4).

TABLE 45G slice to IMS slice mapping relationship

At this time, the terminal randomly selects the large-scale internet of things 5G slice 2 from the plurality of large-scale internet of things 5G slices conforming to the registration service as the 5G slice for registration (see table 5). The random selection is merely an example, and any method capable of selecting a registered 5G slice is applicable to the embodiment of the present invention.

table 55G slice attribute correspondence table

and 8: and the terminal performs IMS service registration to the determined IMS slice through the determined 5G slice.

For example, the 5G slice used for registration is a large-scale internet of things 5G slice 2, the IMS slice used for registration is an agricultural service IMS slice, and the terminal performs IMS service registration on the agricultural service IMS slice through the large-scale internet of things 5G slice 2.

In the embodiment of the present invention, no matter the registration mode, the P-CSCF entity address corresponding to the IMS slice when performing service registration needs to be known, where when the terminal accesses a plurality of 5G slices, the terminal sends a PDU session establishment request to the slice side, including: and the terminal sends a PDU session establishment request according to the address of the P-CSCF entity acquired from the SMF entity.

specifically, the accessing of the terminal into a plurality of 5G slices, the sending of the PDU session establishment request by the terminal to the slice side, includes:

And the terminal sends a PDU session establishment request according to the address of the P-CSCF entity acquired from the SMF entity.

after the terminal sends a PDU session establishment request, the IMS slice and the 5G slice used for registration need to be determined.

Specifically, the determining, by the terminal, the 5G slice and the IMS slice for registration according to a preset mapping relationship between the 5G slice and the IMS slice and the received IMS slice information returned by the slice side includes:

The terminal receives IMS slice information returned by the network side; the terminal determines at least one 5G slice corresponding to the IMS slice information received in a plurality of 5G slices accessed by the terminal according to a preset mapping relation between the 5G slices and the IMS slices; and the terminal takes the IMS slice information acquired by the terminal as an IMS slice for registration, and takes one 5G slice in the at least one determined 5G slice as a 5G slice for registration.

A method for performing IMS service registration will be described in detail below.

as shown in fig. 4, in the embodiment of the present invention, the terminal accesses different IMS slices through one 5G slice.

Step 400, the terminal sends a PDU session establishment request to the network side, including: the terminal sends a PDU session establishment request to the SMF entity;

Step 401, after receiving a registration request sent by a terminal, an SMF entity determines a P-CSCF entity address corresponding to an IMS slice accessed by the terminal according to a mapping relationship between IMS slice information and the P-CSCF entity address;

step 402, the SMF entity sends IMS slice information accessed by the terminal and a P-CSCF entity address corresponding to the IMS slice to the terminal;

Step 403, the terminal determines, according to a preset mapping relationship between the 5G slice and the IMS slice, at least one IMS slice corresponding to the 5G slice accessed by the terminal among the plurality of IMS slice information returned by the SMF entity;

step 404, using the accessed 5G slice as a 5G slice for registration and using the determined IMS slice as an IMS slice for registration;

Step 405, the terminal determines a P-CSCF entity address corresponding to an IMS slice for registration according to a mapping relationship between IMS slice information returned by the SMF entity and the P-CSCF entity address;

And step 406, the terminal performs IMS service registration through the determined 5G slice and the P-CSCF entity address.

As shown in fig. 5, in the embodiment of the present invention, a terminal accesses the same IMS slice through multiple 5G slices.

Step 500, the terminal sends a PDU session establishment request to the network side, including: the terminal sends a PDU session establishment request according to a P-CSCF entity address acquired from the SMF entity;

Step 501, after receiving a registration request sent by a terminal, a P-CSCF entity sends identification information of the terminal to a PCC entity;

Step 502, a PCC entity receives identification information of a terminal sent by a P-CSCF entity, where the identification information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal;

Step 503, the PCC entity queries a corresponding 5G core network element according to the identification information of the terminal to obtain an S-NSSAI carried during registration, and determines the S-NSSAI corresponding to the received identification information of the terminal;

step 504, the PCC entity sends the S-NSSAI to the P-CSCF entity;

step 505, the P-CSCF entity determines, according to the S-NSSAI returned by the PCC entity, an S-NSSAI corresponding to the IMS slice information accessed by the terminal;

Step 506, the P-CSCF entity sends the S-NSSAI corresponding to the IMS slice information accessed by the terminal to the S-CSCF entity;

step 507, the S-CSCF entity sends the S-NSSAI corresponding to the IMS slice information of the terminal access sent by the P-CSCF entity to the HSS entity;

step 508, the HSS entity receives the S-NSSAI corresponding to the IMS slice information accessed by the terminal sent by the S-CSCF entity;

step 509, the HSS entity determines, according to the mapping relationship between the S-NSSAI and the IMS slice, the received IMS slice information corresponding to the S-CSCF entity;

step 510, the HSS entity sends the determined IMS slice information to an S-CSCF entity, so that the S-CSCF entity notifies the terminal to determine a 5G slice and an IMS slice for registration according to the IMS slice information.

Step 511, the S-CSCF entity sends the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to the terminal;

Step 512, the terminal determines the 5G slice and the IMS slice for registration according to a mapping relationship between the preset 5G slice and the IMS slice and at least one piece of IMS slice information returned by the network side;

And 513, the terminal performs IMS service registration to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

As shown in fig. 6, an embodiment of the present invention provides an apparatus for performing IMS service registration, where the apparatus includes: processor 600 and transceiver 601:

The processor 600 is configured to send a PDU session establishment request to a network side through a transceiver; determining a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and at least one piece of IMS slice information returned by a network side; and performing IMS service registration to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

Optionally, the processor 600 accesses a 5G slice, which is specifically configured to:

And sending a PDU session establishment request to the SMF entity.

Optionally, the processor 600 is specifically configured to:

If the SMF entity returns a plurality of pieces of IMS slice information, determining at least one IMS slice corresponding to a 5G slice accessed by the terminal in the plurality of pieces of IMS slice information returned by the SMF entity according to a preset mapping relation between the 5G slice and the IMS slice, taking the 5G slice accessed by the terminal as a 5G slice for registration use, and taking one IMS slice in the at least one determined IMS slice as an IMS slice for registration use; or the like, or, alternatively,

And if the SMF entity returns an IMS slice message, taking the 5G slice accessed by the terminal as a 5G slice for registration, and taking an IMS slice message returned by the SMF entity received by the terminal as an IMS slice for registration.

Optionally, the processor 600 is specifically configured to:

optionally, the processor 600 accesses a plurality of 5G slices, specifically configured to:

and sending a PDU session establishment request according to the address of the P-CSCF entity acquired from the SMF entity.

Optionally, the processor 600 is specifically configured to:

Receiving IMS slice information returned by a network side; determining at least one 5G slice corresponding to the IMS slice information received in a plurality of 5G slices accessed by the terminal according to a preset mapping relation between the 5G slices and the IMS slices; and taking the IMS slice information acquired by the terminal as an IMS slice for registration, and taking one 5G slice in the at least one determined 5G slice as a 5G slice for registration.

as shown in fig. 7, the present invention provides an apparatus for performing IMS service registration, where the apparatus includes:

at least one processing unit 700 and at least one memory unit 701, wherein said memory unit stores program code which, when executed by said processing unit, causes said processing unit to perform the following:

sending a PDU session establishment request to a network side; determining a 5G slice and an IMS slice for registration according to a preset mapping relation between the 5G slice and the IMS slice and at least one piece of IMS slice information returned by a network side; and performing IMS service registration to the P-CSCF entity corresponding to the determined IMS slice through the determined 5G slice.

optionally, the processing unit 700 is specifically configured to:

and sending a PDU session establishment request to the SMF entity.

optionally, the processing unit 700 is specifically configured to:

if the SMF entity returns a plurality of pieces of IMS slice information, determining at least one IMS slice corresponding to an accessed 5G slice in the plurality of pieces of IMS slice information returned by the SMF entity according to a preset mapping relation between the 5G slice and the IMS slice, taking the accessed 5G slice as a 5G slice for registration use, and taking one IMS slice in the at least one determined IMS slice as an IMS slice for registration use; or the like, or, alternatively,

and if the SMF entity returns an IMS slice message, taking the accessed 5G slice as a 5G slice for registration, and taking an IMS slice message returned by the received SMF entity as an IMS slice for registration.

Optionally, the processing unit 700 is specifically configured to:

optionally, the processing unit 700 is specifically configured to:

And sending a PDU session establishment request according to the address of the P-CSCF entity acquired from the SMF entity.

Optionally, the processing unit 1100 is specifically configured to:

As shown in fig. 8, an embodiment of the present invention provides an apparatus for performing IMS service registration, where the apparatus includes: processor 800 and transceiver 801:

the processor 800 is configured to send, after receiving a registration request sent by a terminal, identification information of the terminal to a PCC entity through a transceiver; determining S-NSSAI corresponding to IMS slice information accessed by the terminal according to the S-NSSAI returned by the PCC entity; and sending the S-NSSAI corresponding to the IMS slice information accessed by the terminal to an S-CSCF entity so that the S-CSCF entity informs the terminal of the IMS slice used for registration according to the received S-NSSAI.

Optionally, the processor 800 is specifically configured to:

taking the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal; or the like, or, alternatively,

As shown in fig. 9, the present invention provides an apparatus for performing IMS service registration, where the apparatus includes:

At least one processing unit 900 and at least one storage unit 901 unit, wherein the storage unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:

After receiving a registration request sent by a terminal, sending identification information of the terminal to a PCC entity; determining S-NSSAI corresponding to IMS slice information accessed by the terminal according to the S-NSSAI returned by the PCC entity; and sending the S-NSSAI corresponding to the IMS slice information accessed by the terminal to an S-CSCF entity so that the S-CSCF entity informs the terminal of the IMS slice used for registration according to the received S-NSSAI.

Optionally, the processing unit 900 is specifically configured to:

taking the S-NSSAI returned by the PCC entity as the S-NSSAI corresponding to the IMS slice information accessed by the terminal; or the like, or, alternatively,

as shown in fig. 10, an embodiment of the present invention provides an apparatus for performing IMS service registration, where the apparatus includes: processor 1000 and transceiver 1001:

The processor 1000 is configured to receive, by a transceiver, identification information of a terminal sent by a P-CSCF entity, where the identification information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal; inquiring a corresponding 5G core network element according to the identification information of the terminal to obtain S-NSSAI carried during registration, and determining the S-NSSAI corresponding to the received identification information of the terminal; and sending the S-NSSAI to the P-CSCF entity so that the P-CSCF entity triggers the S-CSCF entity to inform a terminal of an IMS slice used for registration according to the received S-NSSAI.

as shown in fig. 11, the present invention provides an apparatus for performing IMS service registration, where the apparatus includes:

At least one processing unit 1100 and at least one storage unit 1101, wherein the storage unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:

receiving identification information of a terminal sent by a P-CSCF entity, wherein the identification information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal; inquiring a corresponding 5G core network element according to the identification information of the terminal to obtain S-NSSAI carried during registration, and determining the S-NSSAI corresponding to the received identification information of the terminal; and sending the S-NSSAI to the P-CSCF entity so that the P-CSCF entity triggers the S-CSCF entity to inform a terminal of an IMS slice used for registration according to the received S-NSSAI.

as shown in fig. 12, an embodiment of the present invention provides an apparatus for performing IMS service registration, where the apparatus includes: processor 1200 and transceiver 1201:

the processor 1200 is configured to send, to the HSS entity, the S-NSSAI corresponding to the IMS slice information, sent by the P-CSCF entity and accessed by the terminal, through the transceiver; and sending the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to a terminal, so that the terminal determines a 5G slice and an IMS slice for registration according to the received IMS slice information.

As shown in fig. 13, the present invention provides an apparatus for performing IMS service registration, where the apparatus includes:

At least one processing unit 1300 and at least one memory unit 1301, wherein the memory unit stores program code which, when executed by the processing unit, causes the processing unit to perform the following:

sending S-NSSAI corresponding to IMS slice information accessed by a terminal sent by a P-CSCF entity to an HSS entity; and sending the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to a terminal, so that the terminal determines a 5G slice and an IMS slice for registration according to the received IMS slice information.

as shown in fig. 14, an embodiment of the present invention provides an apparatus for performing IMS service registration, where the apparatus includes: processor 1400 and transceiver 1401:

The processor 1400 is configured to receive, by a transceiver, an S-NSSAI corresponding to IMS slice information accessed by a terminal and sent by an S-CSCF entity; determining IMS slice information corresponding to the received S-CSCF entity according to the mapping relation between the S-NSSAI and the IMS slice; and sending the determined IMS slice information to an S-CSCF entity so that the S-CSCF entity informs the terminal of determining a 5G slice and an IMS slice for registration according to the IMS slice information.

As shown in fig. 15, the present invention provides an apparatus for performing IMS service registration, where the apparatus includes:

at least one processing unit 1500 and at least one storage unit 1501, wherein the storage unit stores program code that, when executed by the processing unit, causes the processing unit to perform the following:

receiving S-NSSAI corresponding to IMS slice information accessed by a terminal sent by an S-CSCF entity; determining IMS slice information corresponding to the received S-CSCF entity according to the mapping relation between the S-NSSAI and the IMS slice; and sending the determined IMS slice information to an S-CSCF entity so that the S-CSCF entity informs the terminal of determining a 5G slice and an IMS slice for registration according to the IMS slice information.

In some possible embodiments, the aspects of IMS service registration provided in the embodiments of the present invention may also be implemented in the form of a program product, which includes program code for causing a computer device to execute the steps in the method for IMS service registration according to various exemplary embodiments of the present invention described in this specification, when the program code runs on the computer device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

a program product for IMS service registration according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a server device. However, the program product of the present invention is not limited thereto, and in this document, the readable storage medium may be any tangible medium containing or storing the program, which can be used by or in connection with an information transmission, apparatus, or device.

A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the periodic network action system, apparatus, or device.

program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device.

the embodiment of the invention also provides a storage medium readable by computing equipment aiming at the method for carrying out IMS service registration, namely, the content is not lost after power failure. The storage medium stores therein a software program, which includes program code, and when the program code runs on a computing device, the software program is read by one or more processors and executed, so as to implement the scheme of IMS service registration by any of the above terminals according to the embodiments of the present invention.

the embodiment of the invention also provides a storage medium readable by computing equipment for the IMS service registration method, namely, the content is not lost after power failure. The storage medium stores therein a software program, which includes program code, and when the program code runs on a computing device, the software program is read by one or more processors and executed, so as to implement any of the above schemes of the embodiments of the present invention for IMS service registration by an SMF entity.

The embodiment of the invention also provides a storage medium readable by computing equipment for the IMS service registration method, namely, the content is not lost after power failure. The storage medium stores therein a software program comprising program code which, when executed on a computing device, when read and executed by one or more processors, implements any of the above schemes for PCC entity to perform IMS service registration in accordance with embodiments of the present invention.

the embodiment of the invention also provides a storage medium readable by computing equipment for the IMS service registration method, namely, the content is not lost after power failure. The storage medium stores therein a software program, which includes program code, and when the program code runs on a computing device, the software program is read by one or more processors and executed, so as to implement any of the above schemes of performing IMS service registration by a P-CSCF entity according to the embodiments of the present invention.

The embodiment of the invention also provides a storage medium readable by computing equipment for the IMS service registration method, namely, the content is not lost after power failure. The storage medium stores therein a software program, including program code, which when executed on a computing device, when read and executed by one or more processors, implements any of the above schemes for IMS service registration by an S-CSCF entity of embodiments of the present invention.

The embodiment of the invention also provides a storage medium readable by computing equipment for the IMS service registration method, namely, the content is not lost after power failure. The storage medium stores therein a software program comprising program code which, when executed on a computing device, when read and executed by one or more processors, implements any of the above aspects of embodiments of the present invention for registration of an IMS service by an HSS entity.

Based on the same inventive concept, the embodiment of the present invention further provides a method for performing IMS service registration, and since the device corresponding to the method is a method corresponding to the device for performing IMS service registration in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the method can be implemented with reference to the implementation of the device, and repeated details are not repeated.

As shown in fig. 16, an embodiment of the present invention provides a method for performing IMS service registration, where the method includes:

step 1600, after receiving a registration request sent by a terminal, a P-CSCF entity sends identification information of the terminal to a PCC entity;

Step 1601, the P-CSCF entity determines, according to the S-NSSAI returned by the PCC entity, an S-NSSAI corresponding to IMS slice information accessed by the terminal;

step 1602, the P-CSCF entity sends the S-NSSAI corresponding to the IMS slice information accessed by the terminal to the S-CSCF entity, so that the S-CSCF entity notifies the terminal of the IMS slice used for registration according to the received S-NSSAI.

optionally, the P-CSCF entity determines, according to the S-NSSAI returned by the PCC entity, an S-NSSAI corresponding to an IMS slice to which the terminal accesses, which may be divided into two cases, which are respectively listed below:

As shown in fig. 17, an embodiment of the present invention provides a method for performing IMS service registration, where the method includes:

Step 1700, a PCC entity receives identification information of a terminal sent by a P-CSCF entity, where the identification information of the terminal is sent by the P-CSCF entity after receiving a registration request of the terminal;

Step 1701, the PCC entity inquires the corresponding 5G core network element to obtain the S-NSSAI carried during registration according to the identification information of the terminal, and determines the S-NSSAI corresponding to the received identification information of the terminal;

step 1702, the PCC entity sends the S-NSSAI to the P-CSCF entity, so that the P-CSCF entity triggers, according to the received S-NSSAI, the S-CSCF entity to notify the terminal of the IMS slice used for registration.

based on the same inventive concept, the embodiment of the present invention further provides a method for performing IMS service registration, and since the device corresponding to the method is a method corresponding to the device for performing IMS service registration in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the method can be implemented with reference to the implementation of the device, and repeated details are not repeated.

as shown in fig. 18, an embodiment of the present invention provides a method for performing IMS service registration, where the method includes:

Step 1800, the S-CSCF entity sends the S-NSSAI corresponding to the IMS slice information of the terminal access sent by the P-CSCF entity to the HSS entity;

step 1801, the S-CSCF entity sends the IMS slice information corresponding to the S-NSSAI returned by the HSS entity to the terminal, so that the terminal determines a 5G slice and an IMS slice for registration according to the received IMS slice information.

As shown in fig. 19, an embodiment of the present invention provides a method for performing IMS service registration, where the method includes:

Step 1900, the HSS entity receives an S-NSSAI corresponding to IMS slice information of a terminal access sent by the S-CSCF entity;

Step 1901, the HSS entity determines, according to the mapping relationship between the S-NSSAI and the IMS slice, IMS slice information corresponding to the received S-CSCF entity;

Step 1902, the HSS entity sends the determined IMS slice information to an S-CSCF entity, so that the S-CSCF entity notifies the terminal to determine a 5G slice and an IMS slice for registration according to the IMS slice information.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

it will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the embodiments of the present invention and their equivalents, the embodiments of the present invention are also intended to encompass such modifications and variations.

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method and equipment for carrying out IMS service registration

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