WO2019120076A1 - 通信方法、相关装置及系统 - Google Patents

通信方法、相关装置及系统 Download PDF

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Publication number
WO2019120076A1
WO2019120076A1 PCT/CN2018/119250 CN2018119250W WO2019120076A1 WO 2019120076 A1 WO2019120076 A1 WO 2019120076A1 CN 2018119250 W CN2018119250 W CN 2018119250W WO 2019120076 A1 WO2019120076 A1 WO 2019120076A1
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WIPO (PCT)
Prior art keywords
cscf
network
service
ims
service information
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PCT/CN2018/119250
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English (en)
French (fr)
Inventor
张彪
舒续祖
左俊
刘世岳
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华为技术有限公司
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Publication of WO2019120076A1 publication Critical patent/WO2019120076A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method, related apparatus, and system.
  • the fifth-generation (5th generation, 5G) network is a next-generation network that network operators hope to deploy, which has high-rate and low-latency characteristics.
  • a network slice is one of the features provided by a 5G network, which can satisfy different service requirements by separating different network slices for the 5G network.
  • a process of selecting a 5G core (5GC) slice by a user equipment (UE) and a 5G network is defined in the prior art.
  • the UE selects a corresponding 5GC network slice according to different service requirements, and each 5GC slice is
  • the UE allocates different IP addresses, for example, the UE uses different IP addresses to initiate different services.
  • the IP multimedia sub-system IMS network also needs to be sliced.
  • the prior art does not solve the problem of how the incoming service request is selected after the UE accesses the IMS slice network.
  • Technical issues with the IMS slicing network are not solved.
  • the embodiment of the present application provides a communication method, related apparatus and system, which can select an incoming service request to an IMS slice network corresponding to a service.
  • an embodiment of the present application provides a communication method in an IP multimedia subsystem IMS slice network, which includes the following steps:
  • the home subscriber server HSS receives the query request message sent by the query call session control function device I-CSCF, where the query request message carries the service information; then the HSS obtains or determines the service call session control function device S corresponding to the service information.
  • An address of the CSCF, the S-CSCF is located in the IMS slice network; the HSS sends a query response message to the I-CSCF, where the query response message carries an address of the S-CSCF in the IMS slice network, and further The CSCF can obtain the address of the S-CSCF in the IMS slice network.
  • the I-CSCF may route the incoming service request after receiving the query response message sent by the HSS. Or it is sent to the corresponding S-CSCF (or IMS slice network) for processing, which solves the technical problem of the incoming service request routing error in the IMS slicing scenario.
  • the HSS before receiving the query request message sent by the I-CSCF, the HSS further includes:
  • the HSS When the user equipment UE is registered in the IMS slice network, the HSS receives the service information of the service provided by the IMS slice network sent by the S-CSCF, and then the HSS saves the correspondence between the service information and the S-CSCF. . For example, the HSS saves the correspondence between the service information and the S-CSCF in the local storage medium of the HSS, so that the HSS can subsequently query the S-CSCF corresponding to the service information.
  • the query request message received by the HSS is a location information request message (LIR)
  • the header field of the LIR message carries the service information
  • the HSS parses the header field of the LIR message, thereby obtaining the carried Business information.
  • the I-CSCF before the HSS receives the query request message sent by the I-CSCF, the I-CSCF receives the incoming service request message, where the service request message carries the service information. Then, the I-CSCF sends a query request message to the HSS, where the query request message carries the service information, and the query request is used to obtain an address of the S-CSCF in the IMS slice network to which the service request message needs to be routed.
  • the foregoing communication method further includes: the I-CSCF transmitting the received service request message to the device corresponding to the address of the S-CSCF carried in the query response message.
  • the receiving, by the HSS, the service information of the service provided by the IMS slice network sent by the S-CSCF may include: the HSS receiving a server allocation request SAR message sent by the S-CSCF, where the SAR message carries the Business information of the services provided by the IMS slicing network.
  • the S-CSCF when the user equipment UE is registered in the IMS slice network, the S-CSCF receives a registration request sent by the I-CSCF, where the registration request carries a service of the service provided by the IMS slice network.
  • the S-CSCF sends the server allocation request SAR message to the HSS, where the SAR message carries the service information of the service provided by the IMS slice network and the address of the S-CSCF, so that the HSS saves the The correspondence between the service information and the address of the S-CSCF.
  • the embodiment provides a communication method in an IMS snippet network of an IP multimedia subsystem, which is mainly applied to user equipment, and includes:
  • the UE first acquires service information of the service provided by the IMS slice network and an address of the proxy call session control function device P-CSCF in the IMS slice network, and then sends a registration message to the P-CSCF according to the address, where The registration message carries the service information of the service provided by the IMS slice network.
  • the registration message sent by the UE may be sent to the HSS by the S-CSCF in the IMS slice network, so that the HSS may store the correspondence between the service information in the IMS slice network and the S-CSCF in the IMS slice network, and the foregoing
  • the first aspect corresponds to facilitating the HSS to query the S-CSCF corresponding to the service information to solve the technical problem of the routing error of the incoming service request in the IMS slicing scenario.
  • the UE acquiring the service information of the service provided by the IMS slice network includes:
  • the UE When the UE attaches to the 5G core network slice corresponding to the IMS slice network, the UE obtains service information of the service provided by the IMS slice network from the 5G core network (for example, AMF).
  • the 5G core network for example, AMF
  • the user equipment carries the service information in a header field of a registration message.
  • the user equipment acquiring the address of the proxy call session control function device P-CSCF in the IMS slice network includes: when the user equipment establishes a PDU session with the 5G core network slice, from the 5G core network A slice (e.g., AMF) obtains the address of the proxy call session control function device P-CSCF in the IMS slice network.
  • a slice e.g., AMF
  • the user equipment may obtain the service information of the service request initiated by the user, and then send the service request to the IMS slice network corresponding to the service information. Therefore, the user equipment can process the service request initiated by the user and send it to the IMS slice network corresponding to the service information for processing.
  • the embodiment provides a home subscriber server HSS corresponding to the communication method provided by the first aspect, which mainly includes:
  • a request receiving module configured to receive a query request message sent by the query call session control function device I-CSCF, where the query request message carries service information
  • an address obtaining module configured to acquire a service call session control corresponding to the service information
  • An address of the function device S-CSCF, the S-CSCF is located in the IMS slice network
  • a response sending module configured to send a query response message to the I-CSCF, where the query response message carries the IMS slice network The address of the S-CSCF.
  • the request receiving module in the HSS is further configured to: when the user equipment UE performs IMS registration, receive service information of a service provided by the IMS slice network sent by the S-CSCF; And a storage module, configured to save a correspondence between the service information and the S-CSCF.
  • the HSS may also save the service information and an IP address of the UE in the IMS slice network. Further, when receiving the query request message, the IP address of the UE in the IMS slice network corresponding to the service information may be acquired.
  • the query request message in the HSS is a location information request message LIR, and the service information is carried in a header field of the LIR message.
  • the request receiving module in the HSS receives the service information of the service provided by the IMS slice network sent by the S-CSCF, where the request receiving module receives the server allocation request SAR message sent by the S-CSCF,
  • the SAR message carries service information of a service provided by the IMS slice network.
  • the embodiment provides a user server HSS and a user equipment corresponding to the communication method provided by the second aspect, which are characterized in that:
  • An information acquiring module configured to acquire service information of a service provided by the IMS slice network and an address of a proxy call session control function device P-CSCF in the IMS slice network;
  • the registration module is configured to send a registration message to the P-CSCF according to the address, where the registration message carries service information of a service provided by the IMS slice network.
  • the information acquiring module of the user equipment acquiring the service information of the service provided by the IMS slice network includes: when the user equipment is attached to the 5G core network slice corresponding to the IMS slice network, And acquiring, by the 5G core network, service information of the service provided by the IMS slice network.
  • the registration module in the user equipment carries the service information in a header field of the registration message.
  • the information acquiring module in the user equipment acquiring the address of the proxy call session control function device P-CSCF in the IMS slice network includes: the information acquiring module is configured to establish a PDU in the user equipment with the 5G core network slice At the time of the session, the address of the proxy call session control function device P-CSCF in the IMS slice network is obtained from the 5G core network slice.
  • an embodiment of the present application provides a home subscriber server, where the server can be implemented by using a general-purpose computer.
  • the home subscriber server may include a memory, a processor, an input and output device, and the like.
  • the program code is stored in the memory, and the processor can acquire and execute the program code stored in the memory, so that the home user server can perform the communication method provided by the first aspect.
  • the specific implementation process refer to the first aspect.
  • the embodiment of the present application provides a communication system, including the home subscriber server and the I-CSCF according to the third aspect.
  • the I-CSCF can receive the incoming service request and send a query request message to the home subscriber server according to the service information in the service request.
  • the service request message may be an invite message
  • the identifier of the S-CSCF may be an IP address of the S-CSCF.
  • the service information of the service provided by the IMS slice network may also be referred to as the service information of the service provided by the 5GC slice network.
  • FIG. 1 is a schematic diagram of networking of a communication system according to Embodiment 1 of the present application.
  • FIG. 2 is a flowchart of a communication method provided in Embodiment 2 of the present application.
  • Embodiment 3 is a flowchart of a communication method provided in Embodiment 3 of the present application.
  • 4a and 4b are flowcharts of a communication method provided in Embodiment 4 of the present application.
  • FIG. 5 is a hardware structural diagram of a home subscriber server provided in Embodiment 5 of the present application.
  • FIG. 6 is a hardware structural diagram of a user equipment according to Embodiment 6 of the present application.
  • FIG. 7 is a schematic structural diagram of a home subscriber server provided in Embodiment 7 of the present application.
  • FIG. 8 is a schematic structural diagram of a user equipment according to Embodiment 8 of the present application.
  • FIG. 1 is a schematic diagram of networking of a communication system according to Embodiment 1.
  • the communication system provided in this embodiment includes a user equipment (UE) and a network side device.
  • the network side device includes a 5G core network (5GC) that performs mobility management, user plane control, and the like on the user equipment accessing the 5G network, and an IMS network that provides IMS services to the user equipment.
  • 5GC 5G core network
  • 5GC can perform network slicing.
  • 5GC is cut into 5GC1 and 5GC2.
  • the IMS network is also sliced, and the IMS network is cut into IMS1 and IMS2.
  • the principle that the IMS network and the 5GC are sliced may include a service type, a user type, a user level, a number segment, and the like, which are not limited in this embodiment of the present application.
  • Different IMS network slices can provide different IMS services, for example, IMS1 provides voice call service, and IMS2 provides public security cluster service.
  • the device in the IMS1 may include a proxy-call session control function (P-CSCF1), a service-call session control function (S-CSCF1), and an application server 1 ( Application service, AS1).
  • P-CSCF1 proxy-call session control function
  • S-CSCF1 service-call session control function
  • AS1 Application service, AS1
  • Devices in IMS2 may include P-CSCF2, S-CSCF2, and AS2.
  • the home subscriber server (HSS) and the interrogating-call session control function (I-CSCF) belong to the common equipment of IMS1 and IMS2, that is, the HSS and the I-CSCF are not sliced.
  • the devices in the 5GC include an access and mobility management function (AMF) for access and mobility management of the UE, and a session management function (SMF) for managing the session of the UE. ), a user plane function (UPF) that controls the user plane of the UE.
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • other devices are also included in the 5GC, for example, a device that performs a policy control function, which is not limited in this embodiment.
  • the UE can access 5GC1 and 5GC2 to obtain two IP addresses (IP1 and IP2), IP1 corresponds to 5GC1, and IP2 corresponds to 5GC2.
  • IP1 and IP2 corresponds to 5GC2.
  • the UE also establishes a packet data unit (PDU) session at 5GC1 and 5GC2, respectively.
  • PDU packet data unit
  • the UE acquires the address of the P-CSCF1 in the IMS1 and the address of the P-CSCF2 in the IMS2 from 5GC1, 5GC2, respectively.
  • the UE initiates an IMS registration with the P-CSCF1 using IP1, and initiates an IMS registration with the P-CSCF2 using IP2.
  • the UE may initiate IMS services on the two IMS slice networks respectively, for example, the UE initiates a virtual reality (VR) service or a public security cluster service in the IMS1, and initiates a voice call service or augmented reality in the IMS2.
  • VR virtual reality
  • AR AR
  • the registration message (register) sent by the UE to the IMS1 carries the service information 1 (such as the service type or the service identifier) of the service provided by the IMS1, and then passes the S-CSCF1 in the IMS1.
  • the service information 1 is sent to the HSS, so that the HSS can save the correspondence between the service information 1 and the S-CSCF1.
  • the UE also carries the service information 2 of the service provided by the IMS2, and the HSS also stores the correspondence between the service information 2 and the S-CSCF2.
  • the HSS may determine the corresponding IMS slice according to the service information carried in the query request.
  • the S-CSCF in the network further returns the address of the S-CSCF corresponding to the service information carried in the query request to the I-CSCF, so that the I-CSCF can send the received service request to the S- corresponding to the service information. CSCF, continuing the follow-up IMS service.
  • this embodiment solves the technical problem of how an incoming service request is selected to the corresponding IMS slice network in the case of IMS network slicing.
  • the incoming service request is routed to the corresponding IMS.
  • the S-CSCF in the slicing network performs processing, which avoids the situation that the service request is routed to the wrong IMS slicing network and causes the IMS service to fail, thereby improving the stability and efficiency of the communication system.
  • FIG. 2 is a flowchart of implementing a communication method according to Embodiment 2 of the present application.
  • the I-CSCF in the IMS network receives the incoming service request message for the user equipment, and then the I-CSCF sends a query request message to the HSS in the IMS network, to obtain the service request.
  • the address of the S-CSCF (or IMS slice network) that needs to be routed, the HSS can perform the following steps:
  • Step 201 The HSS receives a query request message sent by the query call session control function device I-CSCF, where the query request message carries service information.
  • the query request message may be used to obtain an IMS network that the service request needs to be routed to, and the query request message may be a location information request (LIR) message, where the LIR message carries the service information, and Carry the IP address of the UE.
  • LIR location information request
  • This embodiment mainly describes the processing procedure of the UE as the called party (ie, the incoming service request message), and the process of the UE as the initiator of the service request is further described in the following third embodiment.
  • Step 202 The HSS acquires an address of the serving call session control function device S-CSCF corresponding to the service information, where the S-CSCF is located in the IMS slice network.
  • the HSS may locally save the correspondence between the service information of the service provided by the IMS slice network and the S-CSCF in the IMS slice network, and then, after receiving the query request message, locally query the corresponding relationship to obtain the query request message.
  • the HSS can also save the correspondence between the service information of the service provided by the IMS slice network and the network identifier of the IMS slice network.
  • the network identity can be any information that identifies the IMS tile network. Since different IMS slice networks correspond to different S-CSCFs, the network identifier may be specifically an address of the S-CSCF in the IMS slice network. The network identifier may also be the number of the IMS slice network (Slice ID), and the HSS may further query the address of the S-CSCF in the corresponding IMS slice network by the number of the IMS slice network. The number of the IMS slice network and the address of the S-CSCF in the IMS slice network may also be stored in the HSS, so that the HSS can query the correspondence.
  • Step 203 The HSS sends an inquiry response message to the I-CSCF, where the inquiry response message carries an address of the S-CSCF in the IMS slice network.
  • the HSS sends the previously received service request to the S-CSCF in the corresponding IMS slice network, because the HSS sends the query response message carrying the S-CSCF address to the I-CSCF, so that the I-CSCF can
  • the IMS slicing network processes the service request, and implements the processing of the incoming service request in the IMS network slicing scenario.
  • the HSS may receive the service information of the service provided by the IMS slice network sent by the S-CSCF when the user equipment is registered, and then the HSS saves the correspondence between the service information and the S-CSCF, so as to facilitate subsequent The address of the S-CSCF corresponding to the service information is queried according to the correspondence.
  • FIG. 3 is a flowchart of implementing a communication method according to Embodiment 3 of the present application.
  • the communication method provided by the embodiment of the present application is mainly used for a user equipment, and the method includes:
  • Step 301 The UE acquires service information of a service provided by the IMS slice network and an address of the proxy call session control function device P-CSCF in the IMS slice network.
  • the user equipment may obtain the service information of the service provided by the IMS slice network from the 5G core network (for example, AMF) when attaching to the 5GC slice network (corresponding to the IMS slice network).
  • the service information of the service provided by the IMS slice network may also be referred to as the service information of the service provided by the 5GC slice network, because there is a correspondence between the IMS slice network and the 5GC slice network.
  • the UE may also establish a PDU session with the 5GC slice network after attaching to the 5GC slice network, and acquire the address of the P-CSCF in the IMS slice network from the 5GC during the establishment of the PDU session.
  • the UE can locally store the correspondence between the service information of the services provided by the multiple IMS slice networks and the addresses of the P-CSCFs in the slice network.
  • this embodiment is also applicable to a scenario in which the 5GC does not perform network slicing while the IMS network performs slicing.
  • the UE can acquire the service information of the service provided by each IMS slice network and a public IP address from the 5GC when attaching to the 5GC network. Then, the UE acquires the address of the proxy call session control function device P-CSCF in each IMS slice network from the 5GC when establishing a PDU session with the 5GC.
  • the UE may locally store the correspondence between the service information of the service provided by the multiple IMS slice networks and the address of the P-CSCF in the slice network.
  • Step 302 The UE sends a registration message to the corresponding P-CSCF according to the address, where the registration message carries the service information of the service provided by the IMS slice network.
  • the UE may generate a registration message (also referred to as a registration request), and then send a registration message to the P-CSCF in the IMS slice network, where the service information of the service provided by the IMS slice network is carried.
  • the registration message may also carry the IP address of the UE in the 5GC slice network.
  • the P-CSCF may send a change registration message to the I-CSCF in the IMS slice network, and forward the message through the I-CSCF.
  • the S-CSCF finally sends the service information of the service provided by the IMS network to the HSS, and the HSS saves the correspondence between the service information and the S-CSCF, so as to facilitate subsequent query to the IMS slice network corresponding to the service information.
  • the address of the S-CSCF in the network so that the incoming service request is routed to the S-CSCF in the IMS slicing network corresponding to the service information, and the IMS service processing is continued.
  • the UE may initiate a service on the IMS IMS1 or the IMS2.
  • the communication method provided by the embodiment of the present application may further include:
  • Step 303 The UE acquires service information of a service request initiated by the user.
  • the UE can identify the service information of the service initiated by the (user). For example, if the user initiates a dialing procedure and dials a voice call, the UE determines that the user initiates a voice call service. If the user launches the AR/VR application, the UE may determine that the user initiated the low latency service. If the user initiates a mission-critical push-to-talk (MCPTT) application, the UE may determine that the user initiated the public security cluster service.
  • MCPTT mission-critical push-to-talk
  • Step 304 The UE sends the service request to the IMS slice network corresponding to the service information.
  • the UE may further obtain the address of the P-CSCF of the IMS slice network corresponding to the service request. Specifically, the UE may query the correspondence between the service information and the address of the P-CSCF in the IMS slice network, and obtain the address of the corresponding P-CSCF. Then, the UE sends the above service request to the P-CSCF.
  • the P-CSCF processes the service request, for example, forwards the service request to the S-CSCF, and the S-CSCF processes the service request initiated by the user equipment.
  • the user equipment UE may send a service request initiated by the user to the IMS slice network corresponding to the service information according to the correspondence between the locally stored service information and the address of the P-CSCF in the IMS slice network. Medium, so that the business request initiated by the user is correctly processed.
  • the communication method provided in Embodiment 4 of the present application specifically includes the following steps:
  • Step 401 The UE acquires an address of a proxy call session control function device P-CSCF in the IMS slice network and service information of a service provided by the IMS slice network.
  • the service information may be a service type or a service identifier
  • the service type may include a low-latency service (such as an augmented reality AR, a VR service), a voice call service, a short message, a public security cluster service, etc.
  • the service identifier may be The identifier of the application APP.
  • the service provided by the IMS slicing network is also the service that the UE can initiate or receive. Therefore, the service information of the service provided by the IMS slicing network may also be referred to as the service information of the UE.
  • the UE may send the slice ID of all 5GC slice networks supported by the network to the UE when the 5GC is attached to the 5GC, and then the UE selects different 5GC slice networks according to its capability or service information.
  • the 5GC network slice that the UE needs to select may also be specified by the 5GC.
  • Different 5GC slice networks provide different IP addresses for the UE. In this embodiment, the address provided by the 5GC1 for the UE is IP1, and the address provided by the 5GC2 for the UE is IP2.
  • different 5GC network slices correspond to different IMS slice networks, and different IMS slice networks may provide different IMS services.
  • the UE selects the 5GC slice network and selects the corresponding IMS slice network.
  • 5GC1 corresponds to IMS1
  • 5GC2 corresponds to IMS2.
  • the UE can select two 5GC slice network attachments at the same time, and locally establish the correspondence between the capability or service information of the UE (or the service information of the service provided by the IMS slice network) and the 5GC network slice.
  • the IMS slicing network and the 5GC slicing network are in one-to-one correspondence, and the UE may also locally establish a correspondence between the capabilities of the UE or the service information (the service information of the service provided by the IMS slicing network) and the IMS slicing network.
  • the UE may acquire the address of the P-CSCF in the IMS slice network from the 5GC during the establishment of the PDU session with the 5GC slice network. Specifically, the UE may acquire the address of the P-CSCF in the IMS slice network from the AMF or SMF in the 5GC.
  • the UE may also obtain the address of the P-CSCF locally by means of a local configuration, for example, the address of the P-CSCF in the IMS slice network and the service information of the service provided by the IMS slice network are all configured in the UE's subscriber identity module (subscriber) In the identity module (SIM), the UE can obtain the address and service information of the P-CSCF from the local device.
  • SIM subscriber identity module
  • the process of acquiring the P-CSCF address by the UE may also be referred to as P-CSCF discovery.
  • Step 402 The UE sends a registration message to the P-CSCF1 according to the address of the P-CSCF1, where the registration message carries the service information of the service provided by the IMS slice network.
  • the UE initiates registration in the IMS slice network IMS1 as an example, and the process is the same as the process in which the UE initiates registration in the IMS slice network IMS2.
  • the UE may initiate an IMS registration to two IMS slice networks using an IP multimedia private identity (IMPI) and an IP multimedia public identity (IMPU).
  • IMPI IP multimedia private identity
  • IMPU IP multimedia public identity
  • the UE may also initiate IMS registration to the two IMS slice networks using different IMPI and IMPU, respectively.
  • the UE may locally construct a session initial protocol (SIP)-based register message carrying the service information of the service provided by the IMS tile network IMS1.
  • SIP session initial protocol
  • IP1 IP1
  • IP1 IP1
  • Step 403 The P-CSCF1 sends the received registration message to the I-CSCF.
  • the P-CSCF1 queries the address of the I-CSCF of the home of the UE by using the home network domain name of the user in the registration message, and sends the received registration message to the I-CSCF.
  • Step 404 The I-CSCF sends the received registration message to the S-CSCF1 in the IMS slice network IMS1.
  • Step 405 The S-CSCF1 sends the service information of the service provided by the IMS slice network carried in the registration message to the HSS.
  • the S-CSCF1 may send a notification message or a server assignment request (SAR) message to the HSS, where the SAR message or the notification message carries the service information of the service provided by the IMS slice network and the S- The identity of CSCF1 (such as the address or the name of S-CSCF1).
  • SAR server assignment request
  • Step 406 The HSS saves the correspondence between the service information of the service provided by the IMS slice network IMS1 and the foregoing S-CSCF1.
  • the HSS can save the correspondence between the service information and the identifier of the S-CSCF1, so that the subsequent HSS can query the identifier of the S-CSCF according to the correspondence.
  • the UE since the UE acquires the addresses of the P-CSCFs in at least two IMS slice networks, the UE registers with the at least two IMS slice networks.
  • the HSS can store the correspondence between the S-CSCF and the service information in different IMS slice networks.
  • the correspondence stored by HSS can be as follows:
  • the HSS may also update the registration status of the UE to be registered, and send a server assignment answer (SAA) message to the S-CSCF, where the user equipment is carried in the HSS. Subscribe to the information. Then, the S-CSCF1 may send a registration accept message to the UE to inform the UE that the registration in the IMS slice network IMS1 is successful.
  • SAA server assignment answer
  • the UE may initiate a VR service in an IMS slice network (for example, IMS1) after the registration is successful.
  • the UE may also serve as a service request message for the called party to receive the incoming call, for example, receiving a voice call request initiated by another user.
  • the communication method provided in this embodiment may further include:
  • Step 407 The I-CSCF receives the service request message.
  • the I-CSCF receives the voice call service request message.
  • the voice service request message may be an invite invite message carrying an identifier of the UE, such as a SIP address of the UE.
  • Step 408 The I-CSCF sends a query request message to the HSS for querying an address of the S-CSCF in the IMS slice network.
  • the I-CSCF After receiving the service request message, the I-CSCF sends an inquiry request message to the HSS, where the service information is carried.
  • the query request message is used to query the address of the S-CSCF corresponding to the service request message (or query the address of the S-CSCF in the IMS slice network corresponding to the service request message), which is specifically a LIR message and service information in this embodiment. It can be carried in the feature tag of the LIR message.
  • Step 409 The HSS acquires an address of the serving call session control function device S-CSCF corresponding to the service information, where the S-CSCF is located in the IMS slice network.
  • the service information corresponding to the service request message is a voice service
  • the HSS queries the address 192.125.6.5 of the S-CSCF2 in the corresponding IMS2.
  • Step 410 The HSS sends an inquiry response message to the I-CSCF, where the message carries the address of the S-CSCF2.
  • the query response message may be a location information answer (LIA) message carrying the address 192.125.6.5 of the S-CSCF2 in the IMS slice network IMS2.
  • LIA location information answer
  • Step 411 The I-CSCF sends the received service request message to the device corresponding to the address of the S-CSCF2 carried in the query response message.
  • the I-CSCF forwards the received service request to the S-CSCF2 in the IMS slice network IMS2, and the S-CSCF2 performs voice service processing.
  • Step 412 The S-CSCF2 sends the service request message to the AS2 for processing.
  • the S-CSCF2 since the service request message is a voice service request message, the S-CSCF2 sends the service request message to the multimedia TEL application server (MMTEL AS) or service centralization (service centralization).
  • MMTEL AS multimedia TEL application server
  • service centralization service centralization
  • SCC voice service processing, for example, performing called domain selection, for example, selecting a circuit switched domain.
  • Step 413 The AS2 returns the processed service request message to the S-CSCF2.
  • the service request message returned by AS2 can carry the result of the domain selection and other information.
  • Step 414 The S-CSCF2 sends the service request message to the P-CSCF2.
  • Step 415 The P-CSCF2 forwards the service request message to the UE.
  • the UE may prompt the user to answer or reject the voice call request.
  • the foregoing steps 407-415 describe a method for processing an incoming voice call service request through the IMS-slice network IMS2.
  • the service request of the incoming AR/VR can also be processed through the IMS-slice network IMS1, and the specific processing procedure refers to the foregoing method. step.
  • FIG. 5 is a hardware structural diagram of a home subscriber server HSS according to Embodiment 5 of the present application.
  • the HSS can be implemented by using general computer hardware, which includes a processor 501, a memory 502, a bus 503, an input device 504, an output device 505, and a network interface 506.
  • the HSS may also be referred to as a unified device management (UDM) device.
  • UDM unified device management
  • memory 502 can include computer storage media in the form of volatile and/or nonvolatile memory, such as read only memory and/or random access memory.
  • Memory 502 can store operating systems, applications, other program modules, executable code, program data, user account opening data, user subscription data, and the like.
  • Input device 504 can be used to input commands and information to the HSS, such as a keyboard or pointing device such as a mouse, trackball, touch pad, microphone, joystick, game pad, satellite television antenna, scanner, or the like. These input devices can be connected to the processor 501 via a bus 503.
  • the output device 505 can be used for HSS output information. In addition to the monitor, the output device 505 can also be configured for other peripheral outputs, such as speakers and/or printing devices, which can also be coupled to the processor 501 via the bus 503.
  • the HSS can be connected to the network through a network interface 506, such as a local area network (LAN).
  • a network interface 506 such as a local area network (LAN).
  • computer-executed instructions stored in the HSS can be stored in a remote storage device without being limited to local storage.
  • the HSS may perform the method steps on the HSS side in the above embodiment, for example, performing steps 201-203, 406, 409-410, and the like.
  • the HSS may perform the method steps on the HSS side in the above embodiment, for example, performing steps 201-203, 406, 409-410, and the like.
  • FIG. 6 is a schematic structural diagram of a user equipment according to Embodiment 6 of the present application.
  • the user equipment mainly includes a processor 601, a memory 602, a bus 603, an input device 604, an output device 605, and a network interface 606.
  • the user equipment may further include an application processor (AP), a battery, and the like.
  • AP application processor
  • memory 602 can include computer storage media in the form of volatile and/or nonvolatile memory, such as read only memory and/or random access memory.
  • Memory 602 can store operating systems, applications, other program modules, executable code, and program data.
  • Input device 604 can be used to input commands and information to a user device, such as a keyboard or pointing device such as a mouse, trackball, touch pad, microphone, joystick, game pad, round dish satellite television antenna, scanner, or Similar equipment. These input devices can be connected to the processor 601 via the bus 603.
  • a user device such as a keyboard or pointing device such as a mouse, trackball, touch pad, microphone, joystick, game pad, round dish satellite television antenna, scanner, or Similar equipment.
  • the output device 605 can be used for the user device to output information.
  • the output device 605 can also be provided for other peripheral outputs, such as speakers, which can also be connected to the processor 601 via the bus 603.
  • the user equipment can be connected to the network through the network interface 606, for example, through a wireless interface to a WIFI network, 5G, long term evolution (LTE) network.
  • a wireless interface to a WIFI network, 5G, long term evolution (LTE) network.
  • LTE long term evolution
  • computer-executed instructions stored in a user device can be stored in a remote storage device without being limited to local storage.
  • the user equipment may perform the method steps on the user equipment side in the above embodiment, for example, perform steps 301-304, 401-402, and the like. .
  • the processor 601 in the user equipment executes the executable code or application stored in the memory 602
  • the user equipment may perform the method steps on the user equipment side in the above embodiment, for example, perform steps 301-304, 401-402, and the like. .
  • steps 301-304, 401-402, and the like for specific implementation processes and beneficial effects, refer to the related embodiments above, and details are not described herein again.
  • FIG. 7 is a schematic diagram of functions of a home subscriber server provided in Embodiment 7 of the present application.
  • the home subscriber server HSS provided by the embodiment of the present application mainly includes a request receiving module 701, an address obtaining module 702, and a response sending module 703.
  • the request receiving module 701 is configured to receive a query request message sent by the query call session control function device I-CSCF, where the query request message carries service information; wherein the query request message may be a location information request message LIR, the LIR
  • the service information is carried in a header field (or feature tag) of the message.
  • the address obtaining module 702 is configured to obtain an address of the serving call session control function device S-CSCF corresponding to the service information, where the S-CSCF is located in the IMS slice network, and the response sending module 703 is configured to The I-CSCF sends a query response message, where the query response message carries the address of the S-CSCF in the IMS slice network.
  • the home subscriber server provided by the embodiment of the present application may be used in the foregoing method embodiment, and the home subscriber server in the foregoing method embodiment is completed by the cooperation between the request receiving module 701, the address obtaining module 702, and the response sending module 703. Method steps on one side.
  • the home subscriber server provided by this embodiment has the same beneficial effects as the foregoing method embodiment when performing the above communication procedure.
  • the request receiving module 701 in the HSS is further configured to: when the user equipment UE performs IMS registration, receive service information of a service provided by the IMS slice network sent by the S-CSCF.
  • the foregoing HSS may further include a storage module 704, configured to save a correspondence between the service information and the S-CSCF, so as to facilitate obtaining an address of the S-CSCF corresponding to the service information according to the correspondence.
  • the request receiving module 701 in the HSS receives the service information of the service provided by the IMS slice network sent by the S-CSCF, where the request receiving module 701 receives the server allocation request SAR message sent by the S-CSCF.
  • the SAR message carries service information of a service provided by the IMS slice network.
  • the request receiving module 701 parses the SAR message to obtain the service information.
  • FIG. 8 is a schematic diagram of functions of a user equipment according to Embodiment 8 of the present application.
  • the user equipment provided in this embodiment of the present application includes:
  • the information obtaining module 801 is configured to obtain service information of a service provided by the IMS slice network and an address of a proxy call session control function device P-CSCF in the IMS slice network;
  • the registration module 802 is configured to send a registration message to the P-CSCF according to the address, where the registration message carries service information of a service provided by the IMS slice network.
  • the registration module 802 can carry the service information in a header field of the registration message.
  • the user equipment provided by the embodiment of the present application may be used in the foregoing method embodiment, and the method steps of the user equipment side in the method embodiment are completed by the cooperation between the information acquiring module 801 and the registration module 802.
  • the information acquiring module 801 and the registration module 802 in this embodiment may further implement other functions of the user equipment in the foregoing method embodiments, and details are not described herein again.
  • the user equipment provided by this embodiment has the same beneficial effects as the foregoing method embodiments when performing the above communication process.
  • the step of the information acquiring module 801 acquiring the service information of the service provided by the IMS network is specifically: the information acquiring module 801 is attached to the IMS slice network.
  • the service information of the service provided by the IMS slice network is obtained from the 5G core network slice (for example, AMF).
  • the information acquiring module 801 acquiring the address of the proxy call session control function device P-CSCF in the IMS slice network includes: when the user equipment establishes a PDU session with the 5G core network slice, the information obtaining module 801 A 5G core network slice (e.g., AMF) obtains the address of the proxy call session control function device P-CSCF in the IMS slice network.
  • a 5G core network slice e.g., AMF
  • the HSS and the user equipment in the seventh and eighth embodiments are presented in the form of functional modules, where the "module” may refer to a specific application integrated circuit, a processor and a memory that execute one or more software or firmware programs. , integrated logic, and/or other devices that provide the above functionality.
  • the HSS and the user equipment in this embodiment can also be implemented by using the hardware forms shown in FIG. 5 and FIG. 6, respectively.
  • the functions implemented by the request receiving module 701, the address obtaining module 702 and the response sending module 703 in the HSS can be implemented by the processor 501 and the memory 502 in FIG.
  • the request receiving module 701 receiving the query request message sent by the query call session control function device I-CSCF can be implemented by the processor 501 executing the code stored in the memory 502.
  • the functions implemented by the information acquisition module 801 and the registration module 802 in the user equipment can be implemented by the processor 601 and the memory 602 in FIG.
  • the step of acquiring the service information of the service provided by the IMS slice network and the address of the proxy call session control function device P-CSCF in the IMS slice network by the information acquisition module 801 may be performed by the processor 601 to execute the storage in the memory 602.
  • the code is implemented.
  • the processor for implementing the foregoing user equipment and the home subscriber server may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, Hardware components or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations and the like.

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Abstract

在实施例提供了一种IMS切片网络中的通信方法、相关设备和系统。在本实施例中，HSS接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息，所述查询请求消息中携带业务信息，然后HSS获取与所述业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址，S-CSCF位于IMS切片网络中；HSS向I-CSCF发送查询响应消息，查询响应消息中携带IMS切片网络中的S-CSCF的地址。由于I-CSCF在发送查询请求消息之前接收到的入局的业务请求中携带业务信息，因而I-CSCF可以在接收到HSS发送的查询响应消息后，将入局的业务请求路由或发送到对应的S-CSCF(或IMS切片网络)中进行处理，其解决了IMS切片场景下的入局的业务请求路由错误的技术问题。

Description

通信方法、相关装置及系统
本申请要求于2017年12月21日提交中国国家知识产权局、申请号为201711396440.3、发明名称为“通信方法、相关装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体而言涉及一种通信方法、相关装置及系统。
背景技术
第五代(5th generation,5G)网络是网络运营商希望部署的下一代网络，其具有高速率，低延时的特性。网络切片(slice)是5G网络提供的特性之一，其可以通过对5G网络分出不同的网络切片来满足不同的业务需求。
现有技术中定义了用户设备(User Equipment，UE)和5G网络配合选择5G核心网(5G core，5GC)切片的流程，UE根据不同的业务需求选择对应的5GC网络切片，每个5GC切片为UE分配不同的IP地址，例如UE使用不同的IP地址发起不同的业务。
但是，有些场景下，IP多媒体子系统(IP multimedia sub-system)IMS网络也需要进切片，现有技术没有解决UE在接入到IMS切片网络后，入局(incoming)的业务请求如何选择到对应的IMS切片网络的技术问题。
发明内容
本申请实施例提供了一种可以将入局的业务请求选择到与业务对应的IMS切片网络的通信方法，相关装置和系统。
在一方面，本申请实施例提供一种IP多媒体子系统IMS切片网络中通信方法，其包括如下的步骤：
归属用户服务器HSS接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息，所述查询请求消息中携带业务信息；随后HSS获取或确定与所述业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址，该S-CSCF位于所述IMS切片网络中；HSS向该I-CSCF发送查询响应消息，所述查询响应消息中携带所述IMS切片网络中的S-CSCF的地址，进而I-CSCF可以获取IMS切片网络中的S-CSCF的地址。在本实施例中，由于I-CSCF在发送查询请求消息之前接收到的入局的业务请求中携带业务信息，因而I-CSCF可以在接收到HSS发送的查询响应消息后，将入局的业务请求路由或发送到对应的S-CSCF(或IMS切片网络)中进行处理，其解决了IMS切片场景下的入局的业务请求路由错误的技术问题。
在一个可能的方案中，HSS在接收I-CSCF发送的查询请求消息之前，还包括：
当用户设备UE在上述IMS切片网络中注册时，HSS接收所述S-CSCF发送的所述IMS切片网络提供的业务的业务信息，然后HSS保存所述业务信息和所述S-CSCF的对应关系。例如，HSS将业务信息和S-CSCF的对应关系保存在HSS的本地存储介质中，从而方便HSS后续查询与业务信息对应的S-CSCF。
在一个可能的方案中，HSS接收到的查询请求消息为位置信息请求消息LIR，所述 LIR消息的头域中携带所述业务信息，HSS解析该LIR消息的头域，即可获得其中携带的业务信息。
在一个可能的方案中，在HSS接收I-CSCF发送的查询请求消息之前，I-CSCF接收入局的业务请求消息，该业务请求消息中携带业务信息。随后，I-CSCF向该HSS发送查询请求消息，所述查询请求消息中携带该业务信息，该查询请求用于获取该业务请求消息需要路由到的IMS切片网络中的S-CSCF的地址。
在一个可能的方案中，上述通信方法还包括：I-CSCF将接收的业务请求消息发送给与所述查询响应消息中携带的S-CSCF的地址对应的设备。
在一个可能的方案中，HSS接收S-CSCF发送的所述IMS切片网络提供的业务的业务信息具体可以包括：HSS接收S-CSCF发送的服务器分配请求SAR消息，所述SAR消息中携带所述IMS切片网络提供的业务的业务信息。
在一个可能的方案中，当用户设备UE在上述IMS切片网络中注册时，S-CSCF接收所述I-CSCF发送的注册请求，所述注册请求中携带所述IMS切片网络提供的业务的业务信息；随后S-CSCF向所述HSS发送所述服务器分配请求SAR消息，所述SAR消息中携带所述IMS切片网络提供的业务的业务信息和所述S-CSCF的地址，从而HSS保存所述业务信息和所述S-CSCF的地址之间的对应关系。
第二方面，本实施例提供一种IP多媒体子系统IMS切片网络中的通信方法，主要应用于用户设备，其包括：
UE先获取所述IMS切片网络提供的业务的业务信息和所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址，然后根据所述地址向所述P-CSCF发送注册消息，所述注册消息中携带所述IMS切片网络提供的业务的业务信息。由于UE发送的注册消息会被IMS切片网络中的S-CSCF发送到HSS，从而HSS可以存储该IMS切片网络中的业务信息与该IMS切片网络中的S-CSCF之间的对应关系，与上述的第一方面对应，便于HSS后续查询与业务信息对应的S-CSCF，以解决IMS切片场景下的入局业务请求路由错误的技术问题。
在一个可选的方案中，所述UE获取IMS切片网络提供的业务的业务信息包括：
UE在附着到与所述IMS切片网络对应的5G核心网切片时，从5G核心网(例如AMF)获取所述IMS切片网络提供的业务的业务信息。
一个可选的方案，所述用户设备在注册消息的头域中携带所述业务信息。
一个可选的方案，所述用户设备获取IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址包括：用户设备在与所述5G核心网切片建立PDU会话时，从所述5G核心网切片(例如AMF)获得所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址。
一个可选的方案，用户设备可以获取用户发起的业务请求的业务信息，然后向与业务信息对应的IMS切片网络发送该业务请求。从而，用户设备可以处理用户主动发起的业务请求，并将其发送到与业务信息对应的IMS切片网络中进行处理。
第三方面，本实施例提供一种与第一方面提供的通信方法对应的归属用户服务器HSS，其主要包括：
请求接收模块，用于接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息，所述查询请求消息中携带业务信息；地址获取模块，用于获取与所述业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址，所述S-CSCF位于IMS切片网络中；以及响应 发送模块，用于向所述I-CSCF发送查询响应消息，所述查询响应消息中携带所述IMS切片网络中的S-CSCF的地址。
一个可选的方案，HSS中的请求接收模块还用于在用户设备UE进行IMS注册时，接收所述S-CSCF发送的所述IMS切片网络提供的业务的业务信息；此时，HSS还包括存储模块，用于保存所述业务信息和所述S-CSCF的对应关系。可选的，HSS还可以保存所述业务信息和UE在该IMS切片网络中的IP地址。进而，后续在接收到查询请求消息时，可以获取与该业务信息对应的IMS切片网络中UE的IP地址。
一个可选的方案，HSS中的查询请求消息为位置信息请求消息LIR，所述LIR消息的头域中携带所述业务信息。
一个可选的方案，HSS中的请求接收模块接收S-CSCF发送的所述IMS切片网络提供的业务的业务信息包括：所述请求接收模块接收所述S-CSCF发送的服务器分配请求SAR消息，所述SAR消息中携带所述IMS切片网络提供的业务的业务信息。
第四方面，本实施例提供一种与第二方面提供的通信方法对应的户服务器HSS、一种用户设备，其特征在于，包括：
信息获取模块，用于获取所述IMS切片网络提供的业务的业务信息和所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址；
注册模块，用于根据所述地址向所述P-CSCF发送注册消息，所述注册消息中携带所述IMS切片网络提供的业务的业务信息。
一个可选的方案，用户设备中的信息获取模块获取所述IMS切片网络提供的业务的业务信息包括：信息获取模块在所述用户设备附着到与所述IMS切片网络对应的5G核心网切片时，向5G核心网获取所述IMS切片网络提供的业务的业务信息。
一个可选的方案，用户设备中的注册模块在注册消息的头域中携带所述业务信息。
一个可选的方案，用户设备中的信息获取模块获取IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址包括：信息获取模块在所述用户设备在与所述5G核心网切片建立PDU会话时，从所述5G核心网切片获得所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址。
第五方面，本申请实施例提供一种归属用户服务器，该服务器可以采用通用的计算机来实现。归属用户服务器可以包括存储器、处理器、输入输出设备等。其中，存储器中存储了程序代码，处理器可以获取并执行存储器中存储的程序代码，从而使得归属用户服务器可以执行上述第一方面提供的通信方法，具体执行过程参见上述第一方面。
第六方面，本申请实施例提供一种通信系统，其包括第三方面所述的归属用户服务器和I-CSCF。I-CSCF可以接收入局的业务请求，并根据业务请求中的业务信息向归属用户服务器发送查询请求消息。
在以上任一方面提供的实施例中，业务请求消息可以为邀请消息，S-CSCF的标识可以为S-CSCF的IP地址。可选的，IMS切片网络提供的业务的业务信息也可称为5GC切片网络提供的业务的业务信息。
附图说明
图1是本申请实施例一提供的通信系统的组网示意图；
图2是本申请实施例二提供的通信方法的流程图；
图3是本申请实施例三提供的通信方法的流程图；
图4a、4b是本申请实施例四提供的通信方法的流程图。
图5是本申请实施例五提供的归属用户服务器的硬件结构图；
图6是本申请实施例六提供的用户设备的硬件结构图；
图7是本申请实施例七提供的归属用户服务器的结构示意图；
图8是本申请实施例八提供的用户设备的结构示意图。
具体实施方式
本申请提供一种通信方法、相关装置及系统，参见图1，图1是本实施例一提供的通信系统的组网示意图。
如图1所示，本实施例提供的通信系统包括用户设备(user equipment，UE)和网络侧设备。网络侧设备包括对接入5G网络的用户设备进行移动性管理、用户面控制等的5G核心网(5G core network，5GC)以及对用户设备提供IMS业务的IMS网络。
其中，5GC可以进行网络切片。例如5GC被切为5GC1和5GC2。此外，IMS网络也进行了切片，IMS网络被切成了IMS1和IMS2。IMS网络和5GC进行切片的原则可以包括业务类型、用户类型、用户级别、号码段等，本申请实施例对此不作限定。不同的IMS网络切片可以提供不同的IMS业务，例如IMS1提供语音呼叫业务，IMS2提供公共安全集群业务。
IMS1中的设备可以包括代理呼叫会话控制功能设备1(proxy-call session control function，P-CSCF1)，业务呼叫会话控制功能设备1(service-call session control function，S-CSCF1)以及应用服务器1(application service，AS1)。IMS2中的设备可以包括P-CSCF2，S-CSCF2以及AS2。归属用户服务器(home subscriber server，HSS)和查询呼叫会话控制功能设备(interrogating-call session control function，I-CSCF)属于IMS1和IMS2公共的设备，即HSS和I-CSCF没有进行切片。
5GC中的设备包括对UE进行接入和移动性管理的接入和移动性管理功能设备(access and mobility management function，AMF)、对UE的会话进行管理的会话管理功能设备(session management function，SMF)、对UE的用户面进行控制的用户面功能设备(user plane function，UPF)。此外，5GC中还包括其他设备，例如，进行策略控制功能的设备，本实施例对此不作限定。
在UE开机后，UE可以接入5GC1和5GC2，获得两个IP地址(IP1和IP2)，IP1对应5GC1，IP2对应5GC2。UE还在5GC1和5GC2分别建立分组数据单元(packet data unit，PDU)会话。在建立PDU会话的过程中，UE分别从5GC1、5GC2获取到IMS1中的P-CSCF1的地址和IMS2中的P-CSCF2的地址。此后，UE使用IP1向P-CSCF1发起IMS注册，使用IP2向P-CSCF2发起IMS注册。在注册完成后，UE可以分别在这两个IMS切片网络发起IMS业务，例如UE在IMS1发起虚拟现实(virtual reality，VR)业务或公共安全集群业务，在IMS2发起语音呼叫业务或增强现实(augmented reality,AR)业务等。
在本实施例中，UE在IMS1发起注册时，向IMS1发送的注册消息(register)中携带了IMS1提供的业务的业务信息1(例如业务类型或业务标识)，然后通过IMS1中的S-CSCF1将业务信息1发送给HSS，从而HSS可以保存该业务信息1与S-CSCF1的对应关系。同样的，UE在IMS2发起注册时，同样携带IMS2提供的业务的业务信息2，HSS同样保存业务信息2与S-CSCF2的对应关系。进而，在后续IMS网络中的I-CSCF接收到入 局的业务请求，并向HSS发送查询请求获取该业务请求对应的S-CSCF时，HSS可以根据查询请求中携带的业务信息确定对应的IMS切片网络中的S-CSCF，进而将与查询请求中携带的业务信息对应的S-CSCF的地址返回给I-CSCF，使得I-CSCF可以将接收到的业务请求发送到与业务信息对应的S-CSCF，继续后续的IMS业务。
与现有技术相比，本实施例解决了IMS网络切片的情况下，入局(incoming)的业务请求如何选择到对应的IMS切片网络的技术问题，本实施例将入局的业务请求路由到对应IMS切片网络中的S-CSCF进行处理，避免了业务请求被路由到错误的IMS切片网络而导致IMS业务失败的情况，提高了通信系统的稳定性和效率。
基于上述通信系统，本实施例提供一种通信方法。参考图2，图2是本申请实施例二提供的通信方法的实现流程图。
在本实施例提供的通信方法中，IMS网络中的I-CSCF接收到针对用户设备的入局的业务请求消息，然后I-CSCF向IMS网络中的HSS发送查询请求消息，用于获取该业务请求需要路由到的S-CSCF的地址(或IMS切片网络)，HSS可以执行以下步骤：
步骤201、HSS接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息，所述查询请求消息中携带业务信息。
其中，查询请求消息可以用于获取该业务请求需要路由到的IMS切片网络，该查询请求消息可以为位置信息请求(location information request，LIR)消息，所述LIR消息携带所述业务信息，还可以携带UE的IP地址。本实施例主要描述UE作为被叫(即入局的业务请求消息)的处理流程，UE作为业务请求的发起方的流程参考后续实施例三的进一步描述。
步骤202、HSS获取与所述业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址，所述S-CSCF所述位于IMS切片网络中。
其中，HSS可以在本地保存IMS切片网络提供的业务的业务信息与IMS切片网络中的S-CSCF的对应关系，进而在接收到查询请求消息后，在本地查询该对应关系，获得与查询请求消息中携带的业务信息对应的IMS切片网络中的S-CSCF的地址。
可选的，HSS本地也可以保存IMS切片网络提供的业务的业务信息与IMS切片网络的网络标识之间的对应关系。该网络标识可以为任何能标识该IMS切片网络的信息。由于不同的IMS切片网络对应不同的S-CSCF，因而该网络标识可以具体为该IMS切片网络中的S-CSCF的地址。该网络标识还可以为IMS切片网络的编号(切片标识ID)，HSS进一步通过该IMS切片网络的编号可以查询到对应的IMS切片网络中的S-CSCF的地址。IMS切片网络的编号与IMS切片网络中的S-CSCF的地址也可以保存在HSS中，便于HSS查询该对应关系。
步骤203、HSS向所述I-CSCF发送查询响应消息，所述查询响应消息中携带所述IMS切片网络中的S-CSCF的地址。
在本实施例中，由于HSS向I-CSCF发送了携带S-CSCF地址的查询响应消息，可以使得I-CSCF将之前接收到的业务请求转发到对应IMS切片网络中的S-CSCF，从而该IMS切片网络对该业务请求进行处理，实现了在IMS网络切片场景下的入局业务请求的处理。
在本实施例中，HSS可以在用户设备注册时，接收S-CSCF发送的所述IMS切片网络提供的业务的业务信息，进而HSS保存所述业务信息和该S-CSCF的对应关系，便于后续根据该对应关系查询与业务信息对应的S-CSCF的地址。
参考图3，图3是本申请实施例三提供的通信方法的实现流程图。
本申请实施例提供的通信方法主要用于用户设备，该方法包括：
步骤301、UE获取IMS切片网络提供的业务的业务信息和该IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址。
其中，用户设备可以在附着到5GC切片网络(与IMS切片网络存在对应关系)时，从5G核心网(例如AMF)获得IMS切片网络提供的业务的业务信息。可选的，由于IMS切片网络和5GC切片网络之间存在对应关系，因而IMS切片网络提供的业务的业务信息也可以称为5GC切片网络提供的业务的业务信息。UE还可以在附着到5GC切片网络后，和5GC切片网络建立PDU会话，并在建立PDU会话的过程中从5GC获取到IMS切片网络中的P-CSCF的地址。
由于用户设备可以附着到多个5GC切片网络，因而UE本地可以保存多个IMS切片网络提供的业务的业务信息与该切片网络中的P-CSCF的地址之间的对应关系。
此外，本实施例也可适用于5GC没有进行网络切片，而IMS网络进行了切片的场景。此时，UE可以在附着到5GC网络时，从5GC获取每个IMS切片网络提供的业务的业务信息和一个公共的IP地址。然后，UE在和5GC建立PDU会话的时候从5GC获取每个IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址。UE本地可以保存多个IMS切片网络提供的业务的业务信息与该切片网络中的P-CSCF的地址之间的对应关系。
步骤302、UE根据所述地址向对应的P-CSCF发送注册消息，所述注册消息中携带所述IMS切片网络提供的业务的业务信息。
其中，UE可以生成注册消息(也可以称为注册请求)，然后向IMS切片网络中的P-CSCF发送注册消息，其中携带IMS切片网络提供的业务的业务信息。此外，该注册消息中还可以携带UE在5GC切片网络中的IP地址。
在本实施例中，UE向P-CSCF发送携带IMS切片网络提供的业务的业务信息的注册消息后，P-CSCF可以向IMS切片网络中的I-CSCF发送改注册消息，通过I-CSCF转发给S-CSCF，最终由S-CSCF将IMS切片网络提供的业务的业务信息发给HSS，HSS保存该业务信息与该S-CSCF的对应关系，便于后续查询到与业务信息对应的IMS切片网络中的S-CSCF的地址，从而将入局的业务请求路由到与业务信息对应的IMS切片网络中的S-CSCF进处理，继续IMS业务处理。
进一步的，UE在完成IMS切片网络IMS1和IMS2的注册后，可以在IMS切片网络IMS1或IMS2主动发起业务，本申请实施例提供的通信方法还可以包括：
步骤303、UE获取用户发起的业务请求的业务信息。
其中，UE可以识别(用户)发起的业务的业务信息。例如用户启动拨号程序，拨打语音电话，则UE确定用户发起了语音通话业务。如果用户启动AR/VR应用程序，则UE可以确定用户发起了低时延业务。如果用户启动了关键任务一键通(mission-critical push-to-talk，MCPTT)应用，则UE可以确定用户发起了公共安全集群业务。
步骤304、UE向与业务信息对应的IMS切片网络发送该业务请求。
在本实施例中，UE在获取发起的业务请求的业务信息后，可以进一步获取与该业务请求对应的IMS切片网络的P-CSCF的地址。具体的，UE可以查询业务信息与IMS切片网络中的P-CSCF的地址之间的对应关系，进而获得对应的P-CSCF的地址。然后，UE向该P-CSCF发送上述业务请求。该P-CSCF对该业务请求进行处理，例如向S-CSCF转发给 业务请求，S-CSCF对该用户设备发起的业务请求进行处理。
因此，本实施例中用户设备UE可以根据本地保存的业务信息与IMS切片网络中的P-CSCF的地址之间的对应关系，将用户主动发起的业务请求发送到与业务信息对应的IMS切片网络中，从而使得用户主动发起的业务请求得到正确的处理。
为更详细的理解本申请，下面给出本申请实施例提供的通信方法的完整实现流程。参考图4a，本申请实施例四提供的通信方法具体包括如下步骤：
步骤401、UE获取IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址和IMS切片网络提供的业务的业务信息。
在本实施例中，业务信息可以为业务类型或业务标识，业务类型可以包括低时延业务(例如增强现实AR,VR业务),语音通话业务，短消息，公共安全集群业务等，业务标识可以为应用APP的标识。需要说明的是，IMS切片网络提供的业务通常也是UE能够发起或接收到的业务，因此IMS切片网络提供的业务的业务信息也可以称为UE的业务信息。
UE可以在附着到5GC的时候，5GC下发网络支持的所有5GC切片网络的切片ID给UE，然后UE根据其能力或业务信息选择不同的5GC切片网络。或者，也可由5GC来指定UE需要选择的5GC网络切片。不同的5GC切片网络为UE提供了不同的IP地址。在本实施例中，5GC1为UE提供的地址为IP1，5GC2为UE提供的地址为IP2。
在本实施例中，不同的5GC网络切片对应了不同的IMS切片网络，不同的IMS切片网络可以提供了不同的IMS业务。UE选择了5GC切片网络，就选择了对应的IMS切片网络。例如5GC1对应IMS1，5GC2对应IMS2。UE可以同时选择两个5GC切片网络附着，并在本地建立UE的能力或业务信息(或IMS切片网络提供的业务的业务信息)与5GC网络切片的对应关系。在本实施例中，IMS切片网络和5GC切片网络一一对应，UE也可以在本地建立UE的能力或业务信息(IMS切片网络提供的业务的业务信息)与IMS切片网络的对应关系。
在本实施例中，由于5GC切片网络和IMS切片网络之间存在对应关系，UE可以在和5GC切片网络建立PDU会话的过程中从5GC获取到IMS切片网络中的P-CSCF的地址。具体的，UE可以从5GC中的AMF或SMF获取到IMS切片网络中的P-CSCF的地址。
此外，UE还可以通过本地配置的方式从本地获取P-CSCF的地址，例如IMS切片网络中的P-CSCF的地址和IMS切片网络提供的业务的业务信息都配置在UE的用户识别模块(subscriber identity module，SIM)中，UE可以从本地获取上述P-CSCF的地址和业务信息。上述UE获取P-CSCF地址的过程也可以称为P-CSCF发现。
步骤402、UE根据P-CSCF1的地址向P-CSCF1发送注册消息，所述注册消息中携带所述IMS切片网络提供的业务的业务信息。
本实施例以UE在IMS切片网络IMS1中发起注册为例，该过程与UE在IMS切片网络IMS2中发起注册的过程相同。在本实施例中，UE可以使用一个IP多媒体私有标识(IP multimedia private identity，IMPI)和一个IP多媒体公有标识(IP multimedia public identity，IMPU)来向两个IMS切片网络发起IMS注册。UE也可以使用不同的IMPI和IMPU分别向两个IMS切片网络发起IMS注册。
在本实施例中，UE可以在本地构造基于会话初始化协议(session initial protocol，SIP)的注册(register)消息，其中携带IMS切片网络IMS1提供的业务的业务信息。 此外，还可以携带UE在5GC1中的IP地址(即IP1)以及用户归属网络域名。该注册消息通过5GC1发送到P-CSCF1，启动IMS注册流程。
步骤403、P-CSCF1向I-CSCF发送接收到的注册消息。
其中，P-CSCF1通过注册消息中的用户归属网络域名来查询UE归属地的I-CSCF的地址，并向I-CSCF发送该接收到的注册消息。
步骤404、I-CSCF向IMS切片网络IMS1中的S-CSCF1发送接收到的注册消息。
步骤405、S-CSCF1向HSS发送注册消息中携带的IMS切片网络提供的业务的业务信息。
其中，S-CSCF1可以向HSS发送通知(notification)消息或服务器分配请求(server assignment request，SAR)消息，SAR消息或通知消息中携带所述IMS切片网络提供的业务的业务信息和所述S-CSCF1的标识(例如地址或S-CSCF1的名称)。
步骤406、HSS保存所述IMS切片网络IMS1提供的业务的业务信息和上述S-CSCF1的对应关系。
其中，HSS可以保存该业务信息和S-CSCF1的标识之间的对应关系，便于后续HSS根据该对应关系查询S-CSCF的标识。
在本实施例中，由于UE获取了至少两个IMS切片网络中的P-CSCF的地址，从而UE向该至少两个IMS切片网络注册。HSS可以保存不同IMS切片网络中的S-CSCF和业务信息之间的对应关系。例如，HSS保存的对应关系可以如下：
IMS切片网络 S-CSCF的地址 业务信息
IMS1 192.125.6.3 VR/AR
IMS2 192.125.6.5 语音业务
在本实施例中，HSS还可以将UE的注册状态更新为已注册(registered)，并向S-CSCF发送服务器分配响应(server assignment answer，SAA)消息，其中携带所述用户设备在HSS中的订阅信息。然后，S-CSCF1可以向UE发送注册接受消息，通知UE在IMS切片网络IMS1中的注册成功。
本实施例提供的通信方法中，UE可以在注册成功后，在IMS切片网络(例如IMS1)发起VR业务。此外，UE还可以作为被叫接收入局的业务请求消息，例如接收其他用户发起的语音呼叫请求。
参见图4b，本实施例提供的通信方法还可以包括：
步骤407、I-CSCF接收业务请求消息。
在本实施例中，I-CSCF接收到语音呼叫业务请求消息。语音业务请求消息可为邀请invite消息，其中携带上述UE的标识，例如UE的SIP地址。
步骤408、I-CSCF向HSS发送查询请求消息，用于查询IMS切片网络中的S-CSCF的地址。
其中，I-CSCF在接收到业务请求消息后，向HSS发送查询请求消息，其中携带业务信息。查询请求消息用于查询该业务请求消息对应的S-CSCF的地址(或查询该业务请求消息对应的IMS切片网络中的S-CSCF的地址)，在本实施例中具体为LIR消息，业务信息可以携带在LIR消息的头域(feature tag)中。
步骤409、HSS获取与业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址， S-CSCF位于上述IMS切片网络中。
在本实施例中，上述业务请求消息对应的业务信息为语音业务，则HSS查询到对应的IMS2中的S-CSCF2的地址192.125.6.5。
步骤410、HSS向I-CSCF发送查询响应消息，该消息中携带S-CSCF2的地址。
在本实施例中，查询响应消息具体可以为位置信息响应(location information answer，LIA)消息，其中携带IMS切片网络IMS2中的S-CSCF2的地址192.125.6.5。
步骤411、I-CSCF将接收的业务请求消息发给与所述查询响应消息中携带的S-CSCF2的地址对应的设备。
在本实施例中，I-CSCF将接收到的业务请求转发给IMS切片网络IMS2中的S-CSCF2，由S-CSCF2进行语音业务处理。
步骤412、S-CSCF2将该业务请求消息发送给AS2进行处理。
在本实施例中，由于该业务请求消息为语音业务请求消息，因此S-CSCF2将该业务请求消息发给多媒体电话应用服务器(Multimedia TEL application server，MMTEL AS)或业务集中和连续性(service centralization and continuity，SCC)AS进行语音业务处理，例如进行被叫域选，例如选择电路交换域。
步骤413、AS2返回处理后的业务请求消息给S-CSCF2。
AS2返回的业务请求消息中可以携带域选的结果和其他信息。
步骤414、S-CSCF2向P-CSCF2发送该业务请求消息。
步骤415、P-CSCF2向UE转发送该业务请求消息。
UE接收到该业务请求消息后，可以提示用户接听或拒绝该语音呼叫请求。
以上步骤407-415描述了通过IMS切片网络IMS2来处理入局的语音呼叫业务请求的方法，本实施例也可以通过IMS切片网络IMS1来处理入局的AR/VR等业务请求，具体处理过程参考上述方法步骤。
参见图5，图5是本申请实施例五提供的归属用户服务器HSS的硬件结构图。
其中，HSS可以采用通用的计算机硬件来实现，其包括处理器501、存储器502、总线503、输入设备504、输出设备505以及网络接口506。HSS也可以称为统一设备管理(unified device management，UDM)设备。
具体的，存储器502可以包括以易失性和/或非易失性存储器形式的计算机存储媒体，如只读存储器和/或随机存取存储器。存储器502可以存储操作系统、应用程序、其他程序模块、可执行代码、程序数据、用户开户数据、用户订阅数据等。
输入设备504可以用于向HSS输入命令和信息，输入设备404如键盘或指向设备，如鼠标、轨迹球、触摸板、麦克风、操纵杆、游戏垫、卫星电视天线、扫描仪或类似设备。这些输入设备可以通过总线503连接至处理器501。
输出设备505可以用于HSS输出信息，除了监视器之外，输出设备505还可以为其他外围输出设各，如扬声器和/或打印设备，这些输出设备也可以通过总线503连接到处理器501。
HSS可以通过网络接口506连接到网络中，例如连接到局域网(Local Area Network，LAN)。在联网环境下，HSS中存储的计算机执行指令可以存储在远程存储设备中，而不限于在本地存储。
当HSS中的处理器501执行存储器502中存储的可执行代码或应用程序时，HSS可 以执行以上实施例中的HSS一侧的方法步骤，例如执行步骤201-203、406、409-410等。具体执行过程参见上述实施例，在此不再赘述。
参见图6，图6是本申请实施例六提供的用户设备的结构示意图。
其中，用户设备主要包括处理器601、存储器602、总线603、输入设备604、输出设备605以及网络接口606。此外，用户设备还可以包括应用处理器(application processor，AP)，电池等部件
具体的，存储器602可以包括以易失性和/或非易失性存储器形式的计算机存储媒体，如只读存储器和/或随机存取存储器。存储器602可以存储操作系统、应用程序、其他程序模块、可执行代码和程序数据。
输入设备604可以用于向用户设备输入命令和信息，输入设备604如键盘或指向设备，如鼠标、轨迹球、触摸板、麦克风、操纵杆、游戏垫、圆盆式卫星电视天线、扫描仪或类似设备。这些输入设备可以通过总线603连接至处理器601。
输出设备605可以用于用户设备输出信息，除了监视器之外，输出设备605还可以为其他外围输出设各，如扬声器，这些输出设备也可以通过总线603连接到处理器601。
用户设备可以通过网络接口606连接到网络中，例如通过无线接口连接到WIFI网络、5G、长期演进(long term evolution，LTE)网络。在联网环境下，用户设备中存储的计算机执行指令可以存储在远程存储设备中，而不限于在本地存储。
当用户设备中的处理器601执行存储器602中存储的可执行代码或应用程序时，用户设备可以执行以上实施例中的用户设备一侧的方法步骤，例如执行步骤301-304、401-402等。具体执行过程和有益效果参见上述相关实施例，在此不再赘述。
参见图7，图7是本申请实施例七提供的归属用户服务器的功能示意图。
如图所示，本申请实施例提供的归属用户服务器HSS主要包括请求接收模块701、地址获取模块702和响应发送模块703。
请求接收模块701，用于接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息，所述查询请求消息中携带业务信息；其中，该查询请求消息可以为位置信息请求消息LIR，所述LIR消息的头域(或特性标签feature tag)中携带所述业务信息。
地址获取模块702，用于获取与所述业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址，所述S-CSCF所述位于IMS切片网络中；响应发送模块703，用于向所述I-CSCF发送查询响应消息，所述查询响应消息中携带所述IMS切片网络中的S-CSCF的地址。
本申请实施例提供的归属用户服务器可以使用在前述方法实施例中，其通过上述的请求接收模块701、地址获取模块702以及响应发送模块703之间的配合来完成上述方法实施例中归属用户服务器一侧的方法步骤。与现有技术中的归属用户服务器相比，本实施例提供的归属用户服务器在执行上述通信流程时，具有与前述方法实施例相同的有益效果。
可选的，HSS中的请求接收模块701还用于在用户设备UE进行IMS注册时，接收所述S-CSCF发送的所述IMS切片网络提供的业务的业务信息。进而，上述HSS还可以包括存储模块704，用于保存所述业务信息和所述S-CSCF的对应关系，便于后续根据该对应关系来获取与业务信息对应的S-CSCF的地址。
可选的，HSS中的请求接收模块701接收S-CSCF发送的所述IMS切片网络提供的业务的业务信息具体可以包括：请求接收模块701接收所述S-CSCF发送的服务器分配请求SAR消息，所述SAR消息中携带所述IMS切片网络提供的业务的业务信息。请求接收模块701解析该SAR消息，即可获得该业务信息。
参见图8，图8是本申请实施例八提供的用户设备的功能示意图。
如图所示，本申请实施例提供的用户设备包括：
信息获取模块801，用于获取所述IMS切片网络提供的业务的业务信息和所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址；
注册模块802，用于根据所述地址向所述P-CSCF发送注册消息，所述注册消息中携带所述IMS切片网络提供的业务的业务信息。其中，注册模块802可以在注册消息的头域中携带所述业务信息。
本申请实施例提供的用户设备可以使用在前述方法实施例中，其通过上述的信息获取模块801和注册模块802之间的配合来完成方法实施例中用户设备一侧的方法步骤。本实施例中的信息获取模块801、注册模块802还可以实现上述方法实施例中用户设备的其他功能，在此不再赘述。
与现有技术中的用户设备相比，本实施例提供的用户设备在执行上述通信流程时，具有与前述方法实施例相同的有益效果。
可选的，在本实施例提供的用户设备中，信息获取模块801获取IMS切片网络提供的业务的业务信息的步骤具体可以包括：信息获取模块801在用户设备附着到与所述IMS切片网络对应的5G核心网切片时，从5G核心网切片(例如AMF)获取所述IMS切片网络提供的业务的业务信息。
此外，信息获取模块801获取IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址包括：信息获取模块801在所述用户设备在与所述5G核心网切片建立PDU会话时，从所述5G核心网切片(例如AMF)获得所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址。
其中，上述实施例七、八中HSS和用户设备均是以功能模块的形式来呈现的，这里的“模块”可以指特定应用集成电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。本领域的技术人员可以想到本实施例中的HSS和用户设备也可以分别采用图5、6所示的硬件形式来实现。
例如，HSS中的请求接收模块701，地址获取模块702和响应发送模块703所实现的功能都可以通过图5中的处理器501和存储器502来实现。例如，请求接收模块701接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息可以通过由处理器501来执行存储器502中存储的代码来实现。
用户设备中的信息获取模块801和注册模块802所实现的功能都可以通过图6中的处理器601和存储器602来实现。例如，信息获取模块801获取所述IMS切片网络提供的业务的业务信息和IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址的步骤可以通过由处理器601来执行存储器602中存储的代码来实现。
此外，用于实现上述用户设备和归属用户服务器的处理器可以是中央处理器，通用处理器、数字信号处理器、专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所 描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合等。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (18)

  1. 一种IP多媒体子系统IMS切片网络中的通信方法，其特征在于，包括：
    归属用户服务器HSS接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息，所述查询请求消息中携带业务信息；
    所述HSS获取与所述业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址，所述S-CSCF位于所述IMS切片网络中；
    所述HSS向所述I-CSCF发送查询响应消息，所述查询响应消息中携带所述IMS切片网络中的S-CSCF的地址。
  2. 如权利要求1所述的方法，其特征在于，在所述接收I-CSCF发送的查询请求消息之前，还包括：
    在用户设备UE在所述IMS切片网络中注册时，所述HSS接收所述S-CSCF发送的所述IMS切片网络提供的业务的业务信息；
    所述HSS保存所述业务信息和所述S-CSCF的对应关系。
  3. 如权利要求1或2所述的方法，其特征在于，
    所述查询请求消息为位置信息请求消息LIR，所述LIR消息的头域中携带所述业务信息。
  4. 如权利要求1所述的方法，其特征在于，还包括：
    所述I-CSCF将接收的业务请求消息发送给与所述查询响应消息中携带的S-CSCF的地址对应的设备。
  5. 如权利要求2所述的方法，其特征在于，所述HSS接收S-CSCF发送的所述IMS切片网络提供的业务的业务信息包括：
    所述HSS接收所述S-CSCF发送的服务器分配请求SAR消息，所述SAR消息中携带所述IMS切片网络提供的业务的业务信息。
  6. 如权利要求2所述的方法，其特征在于，还包括：
    所述S-CSCF接收所述I-CSCF发送的注册请求，所述注册请求中携带所述IMS切片网络提供的业务的业务信息；
    所述S-CSCF向所述HSS发送所述服务器分配请求SAR消息，所述SAR消息中携带所述IMS切片网络提供的业务的业务信息和所述S-CSCF的地址；
    所述HSS保存所述业务信息和所述S-CSCF的对应关系包括：
    所述HSS保存所述业务信息和所述S-CSCF的地址之间的对应关系。
  7. 一种IP多媒体子系统IMS切片网络中的通信方法，应用于用户设备，其特征在于，包括：
    获取所述IMS切片网络提供的业务的业务信息和所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址；
    根据所述地址向所述P-CSCF发送注册消息，所述注册消息中携带所述IMS切片网络提供的业务的业务信息。
  8. 如权利要求7所述的方法，其特征在于，所述获取所述IMS切片网络提供的业务的业务信息包括：
    所述用户设备在附着到与所述IMS切片网络对应的5G核心网切片时，获取所述IMS切片网络提供的业务的业务信息。
  9. 如权利要求7所述的方法，其特征在于，所述用户设备在所述注册消息的头域中携带所述业务信息。
  10. 如权利要求8所述的方法，其特征在于，所述获取IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址包括：
    所述用户设备在与所述5G核心网切片建立PDU会话时，从所述5G核心网切片获得所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址。
  11. 一种归属用户服务器HSS，其特征在于，包括：
    请求接收模块，用于接收查询呼叫会话控制功能设备I-CSCF发送的查询请求消息，所述查询请求消息中携带业务信息；
    地址获取模块，用于获取与所述业务信息对应的服务呼叫会话控制功能设备S-CSCF的地址，所述S-CSCF位于IMS切片网络中；
    响应发送模块，用于向所述I-CSCF发送查询响应消息，所述查询响应消息中携带所述IMS切片网络中的S-CSCF的地址。
  12. 如权利要求11所述的HSS，其特征在于，所述请求接收模块还用于在用户设备UE进行IMS注册时，接收所述S-CSCF发送的所述IMS切片网络提供的业务的业务信息；
    所述HSS还包括存储模块，用于保存所述业务信息和所述S-CSCF的对应关系。
  13. 如权利要求11或12所述的HSS，其特征在于，所述查询请求消息为位置信息请求消息LIR，所述LIR消息的头域中携带所述业务信息。
  14. 如权利要求11所述的HSS，其特征在于，所述请求接收模块接收S-CSCF发送的所述IMS切片网络提供的业务的业务信息包括：
    所述请求接收模块接收所述S-CSCF发送的服务器分配请求SAR消息，所述SAR消息中携带所述IMS切片网络提供的业务的业务信息。
  15. 一种用户设备，其特征在于，包括：
    信息获取模块，用于获取所述IMS切片网络提供的业务的业务信息和所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址；
    注册模块，用于根据所述地址向所述P-CSCF发送注册消息，所述注册消息中携带所述IMS切片网络提供的业务的业务信息。
  16. 如权利要求15所述的用户设备，其特征在于，所述信息获取模块获取所述IMS切片网络提供的业务的业务信息包括：
    所述信息获取模块在所述用户设备附着到与所述IMS切片网络对应的5G核心网切片时，获取所述IMS切片网络提供的业务的业务信息。
  17. 如权利要求15所述的用户设备，其特征在于，所述注册模块在所述注册消息的头域中携带所述业务信息。
  18. 如权利要求16所述的用户设备，其特征在于，所述信息获取模块获取IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址包括：
    所述信息获取模块在所述用户设备在与所述5G核心网切片建立PDU会话时，从所述5G核心网切片获得所述IMS切片网络中的代理呼叫会话控制功能设备P-CSCF的地址。
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