WO2022088183A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

Info

Publication number
WO2022088183A1
WO2022088183A1 PCT/CN2020/125916 CN2020125916W WO2022088183A1 WO 2022088183 A1 WO2022088183 A1 WO 2022088183A1 CN 2020125916 W CN2020125916 W CN 2020125916W WO 2022088183 A1 WO2022088183 A1 WO 2022088183A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
target
network element
user equipment
call
Prior art date
Application number
PCT/CN2020/125916
Other languages
English (en)
French (fr)
Inventor
徐艺珊
诸华林
时书锋
朱浩仁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2020/125916 priority Critical patent/WO2022088183A1/zh
Priority to PCT/CN2021/111629 priority patent/WO2022088832A1/zh
Priority to CN202180072548.5A priority patent/CN116472743A/zh
Priority to EP21884564.2A priority patent/EP4228329A4/en
Publication of WO2022088183A1 publication Critical patent/WO2022088183A1/zh
Priority to US18/308,981 priority patent/US20230269661A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1073—Registration or de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/14—Backbone network devices

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus.
  • the IP multimedia subsystem (IMS) network belongs to a type of data network (DN).
  • the IMS network is connected to a standalone non-public network (SNPN) of an independent network, and the IMS network is the User equipment (UE) in a non-public network provides IMS services.
  • SNPN non-public network
  • UE User equipment
  • the IMS network has service provider attributes.
  • the IMS network provided by service provider A can only provide services for service provider A's user equipment (ie, user equipment with service provider A's subscription data), and cannot provide services for other service providers.
  • User equipment provides services. Since a non-public network is currently connected to an IMS network, the non-public network provides a kind of IMS network provided by a service provider for user equipment, that is, user equipment of only one kind of service provider can connect to the IMS network through the non-public network .
  • the purpose of the present application is to provide a communication method and apparatus, which are used to realize that user equipments of different service providers can connect to the IMS networks of their respective service providers through a non-public network.
  • the present application provides a communication method, and the method can be executed by a session management network element, or a component (such as a chip or circuit) in the session management network element.
  • the method is performed by a session management network element, and the method includes: the session management network element receives the first information from the user equipment, the session management network element and the user equipment are located in a non-public network, and the non-public network Connect to multiple IMS networks, the first information is used to indicate the target IMS network that the user equipment requests to connect to, the target IMS network is one of the multiple IMS networks, and the target IMS network is provided by the target service provider; the session management network element is based on the first information.
  • the first call information is used to establish the connection between the user equipment and the target IMS network; the session management network element sends the first call information to the user equipment.
  • a non-public network is implemented to connect multiple IMS networks to provide respective IMS network services for user equipments of different service providers. Further, the user equipment sends the first information to the session management network element, and the session management network element can determine the target IMS network to which the user equipment requests to connect based on the first information, so as to establish a session connection between the user equipment and the target IMS network, without requiring Adding a local user server to a non-public network helps reduce deployment costs.
  • the first information includes identification information of the target service provider, and/or first call information.
  • the session management network element may determine the target IMS network provided by the target service provider based on the identification information of the target service provider in the first information, and establish a session connection between the user equipment and the target IMS network.
  • the session management network element may determine, based on the first call information in the first information, the target proxy call network element indicated by the first call information, and the target IMS network where the target proxy call network element is located, and establishes the relationship between the user equipment and the target IMS. Session connections between networks.
  • the first information is data network name information
  • the data network name information includes identification information of the target service provider.
  • the user equipment can send enhanced data network name information to the session management network element, where the enhanced data network name information includes the identification information of the target service provider, and the session management network element can obtain the data network name information from the data network name information.
  • the identification information of the target service provider is obtained, and based on the existing session establishment process, a session connection between the user equipment and the target IMS network is established.
  • the target proxy call network element is located in a non-public network, and the method further includes: the session management network element sends second information to the target proxy call network element or the policy control network element; wherein the second information includes the user The identification information of the device and the identification information of the target service provider, and the second information is used to instruct the target proxy call network element to send the IMS message from the user equipment to the target inquiry call network element of the target IMS network.
  • the second information further includes second call information used to indicate the target query calling network element.
  • the session management network element sends the second information to the target proxy call network element, or the session management network element sends the second message to the target proxy call network element via the policy control network element, and the target proxy call network element can be based on the second message.
  • the target proxy call network element is located in a non-public network, and the method further includes: the session management network element determines the second call corresponding to the target service provider according to the corresponding relationship between the service provider and the inquiry call information information; the session management network element determines the target association relationship, and the target association relationship includes the association relationship between the identification information of the user equipment and the second call information, or the target association relationship includes the identification information of the user equipment, the second call information and the target service provision.
  • the association relationship of the identification information of the provider; the session management network element sends the target association relationship to the target agent call network element or the policy control network element.
  • the session management network element can determine the identification information of the user equipment and the second call information according to the corresponding query call information (that is, the second call information) of the target service provider and the target service provider, and the identification information of the user equipment.
  • the target association of the call information The session management network element sends the target association relationship to the target proxy call network element, or sends the target association relationship to the target proxy call network element via the policy control network element.
  • the target proxy call network element can send the IMS message from the user equipment to the corresponding target query call network element according to the target association relationship.
  • the present application provides a communication method, which can be performed by a user equipment, or a component (such as a chip or a circuit) in the user equipment.
  • the method is performed by a user equipment, and the method includes: the user equipment sends first information to a session management network element, the user equipment and the session management network element are located in a non-public network, and the non-public network is connected to multiple IMS network connection, the first information is used to indicate the target IMS network to which the user equipment requests to connect, the target IMS network is one of multiple IMS networks, and the target IMS network is provided by the target service provider; the user equipment receives the information from the session management network element.
  • the first call information where the first call information indicates that the target agent calls a network element, and the first call information is used to establish a connection between the user equipment and the target IMS network.
  • the first information includes identification information of the target service provider, and/or first call information.
  • the first information is data network name information
  • the data network name information includes identification information of the target service provider.
  • the data network name information is obtained by the user equipment from an access and mobility management network element or a session management network element or an access network network element.
  • the first information includes first call information
  • the method further includes: the user equipment receives third information from the access network element, and the third The information includes the first service provider and proxy call information corresponding to the first service provider, and the proxy call information corresponding to the first service provider is the first call information.
  • the user equipment can determine, according to the acquired third information, whether there is a target IMS network that provides services for the user equipment among the multiple IMS networks that are not connected to the public network. If the user equipment determines that the identification information of the service provider to which the user equipment belongs exists in the third information, it determines that a target IMS network exists in multiple IMS networks, and the user equipment can establish a session connection through a non-public network to obtain the information provided by the target IMS network. IMS business.
  • the user equipment determines that the identification information of the service provider to which the user equipment belongs does not exist in the third information, it determines that the target IMS network does not exist in the multiple IMS networks, and cannot establish a session connection through a non-public network to obtain the information provided by the target IMS network. IMS business.
  • the first information includes first call information
  • the method further includes: the user equipment sends a query request to a domain name system server; the query request includes a non-public network
  • the user equipment receives a query response from the domain name system server, the query response includes first call information
  • the target proxy call network element indicated by the first call information is located in the target IMS network and connected to a non-public network.
  • the user equipment can send a query request to the domain name system server, and the query request includes the identification information of the non-public network; if the domain name system server determines to obtain the proxy call information corresponding to the target IMS network domain name, it will feed back to the user equipment the information including the target IMS network name.
  • the user equipment can establish a session connection through a non-public network to obtain the IMS service provided by the target IMS network.
  • the domain name system server determines that the proxy call information corresponding to the target IMS network domain name has not been obtained, it will feedback the query failure to the user equipment, or indicate that the target IMS network is not connected to the non-public network, so that the user equipment can determine that the session cannot be established through the non-public network. Connect to obtain IMS services provided by the target IMS network.
  • the present application provides a communication method, and the method can be executed by a policy control network element, or a component (such as a chip or a circuit) in the policy control network element.
  • the method is executed by a policy control network element, and the method includes: the policy control network element receives second information from the session management network element, where the second information includes identification information of the user equipment and target service provision The identification information of the provider; the policy control network element determines the target association according to the corresponding relationship between the service provider and the inquiry call information and the second information, and the target association includes the association between the identification information of the user equipment and the second call information, or The target association relationship includes the association relationship between the identification information of the user equipment, the second call information, and the identification information of the target service provider, where the second call information indicates the target inquiry call network element, and the target inquiry call network element is located in the target IMS network, And the target inquiry calling network element is connected to the target agent calling network element in the non-public network; the policy control network element sends the target association relationship to the target agent calling network element.
  • the policy control network element may determine the target association relationship according to the corresponding relationship between the service provider and the inquiry call information and the second information, and send the target association relationship to the target proxy call network element.
  • the target proxy call network element can send the IMS message from the user equipment to the corresponding target query call network element according to the target association relationship.
  • the present application provides a communication method, and the method can be executed by a target proxy call network element, or a component (such as a chip or circuit) in the target proxy call network element.
  • the method is executed by the target proxy calling network element, and the method includes: the target proxy calling network element receives IMS information from the user equipment, the IMS information includes the identification information of the user equipment, and the target proxy calling network element receives the IMS information from the user equipment.
  • the element and the user equipment are located in a non-public network;
  • the target proxy call network element determines the second call information according to the target association relationship and the identification information of the user equipment, and the target association relationship includes the association relationship between the identification information of the user equipment and the second call information;
  • the target proxy call network element sends IMS information to the target inquiry call network element indicated by the second call information, and the target inquiry call network element is located in the target IMS network.
  • the method before the target proxy call network element receives the IMS information from the user equipment, the method further includes: the target proxy call network element receives the target association relationship from the policy control network element or the session management network element.
  • the method further includes: the target proxy call network element receives the user equipment identification information and target from the policy control network element or the session management network element.
  • the identification information of the service provider; the target proxy call network element determines the target association relationship according to the corresponding relationship between the service provider and the inquiry call information.
  • the target association relationship further includes identification information of the target service provider.
  • the target proxy call network element may receive the target association relationship from the policy control network element or the session management network element, or receive the identification information of the user equipment and the target service provider from the policy control network element or the session management network element. identification information, and determine the target association.
  • the target proxy call network element can send the IMS message from the user equipment to the corresponding target query call network element according to the target association relationship.
  • an embodiment of the present application provides a communication device, the device may have the function of implementing a session management network element in the first aspect or any possible implementation manner of the first aspect, and the device may be a session management network It can also be a chip included in the session management network element.
  • the apparatus may also have the function of implementing the user equipment in the second aspect or any possible implementation manner of the second aspect, and the apparatus may be user equipment or a chip included in the user equipment.
  • the apparatus may also have the function of implementing the policy control network element in the third aspect or any possible implementation manner of the third aspect, and the apparatus may be a policy control network element or a chip included in the policy control network element.
  • the apparatus may also have the function of implementing the target agent calling network element in the fourth aspect or any possible implementation manner of the fourth aspect.
  • the apparatus may be the target agent calling network element, or the target agent calling network element may include chip.
  • the functions of the above communication apparatus may be implemented by hardware, or by executing corresponding software in hardware, and the hardware or software includes one or more modules or units or means corresponding to the above functions.
  • the structure of the apparatus includes a processing module and a transceiver module, wherein the processing module is configured to support the apparatus to perform session management in the first aspect or any possible implementation manner of the first aspect
  • the corresponding function of the network element or perform the corresponding function of the user equipment in the second aspect or any possible implementation manner of the second aspect, or perform the policy control in the third aspect or any possible implementation manner of the third aspect.
  • the corresponding function of the network element or perform the corresponding function of the target agent calling the network element in the fourth aspect or any of the possible implementation manners of the fourth aspect.
  • the transceiver module is used to support the communication between the device and other communication devices.
  • the communication device may also include a storage module, which is coupled to the processing module and stores necessary program instructions and data of the device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory
  • the memory may be integrated with the processor, or may be provided separately from the processor.
  • the structure of the apparatus includes a processor, and may also include a memory.
  • the processor is coupled to the memory and can be used to execute computer program instructions stored in the memory, so that the apparatus executes the method in the above-mentioned first aspect or any possible implementation manner of the first aspect, and performs the above-mentioned second aspect or the second aspect.
  • the method in any possible implementation manner, executes the above third aspect or the method in any possible implementation manner of the third aspect, and executes the above fourth aspect or the method in any possible implementation manner of the fourth aspect.
  • the apparatus further includes a communication interface to which the processor is coupled.
  • the communication interface may be a transceiver or an input/output interface; when the device is a session management network element or user equipment or a policy control network element
  • the communication interface may be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, when the program or the instruction is executed by the processor , so that the chip system implements the above-mentioned first aspect or the method in any possible implementation manner of the first aspect, or implements the above-mentioned second aspect or the method in any possible implementation manner of the second aspect, or realizes the above-mentioned first aspect.
  • the third aspect or the method in any possible implementation manner of the third aspect, or implementing the method in the fourth aspect or any possible implementation manner of the fourth aspect.
  • the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.
  • processors in the chip system, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory can be integrated with the processor, or can be provided separately from the processor.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the computer to execute the first aspect or any one of the first aspects.
  • a method in a possible implementation manner or performing the method in the above-mentioned second aspect or any one possible implementation manner of the second aspect, or performing the method in the above-mentioned third aspect or any one possible implementation manner in the third aspect, or perform the above fourth aspect or the method in any possible implementation manner of the fourth aspect.
  • an embodiment of the present application provides a computer program product, when a computer reads and executes the computer program product, the computer is made to execute the method in the first aspect or any possible implementation manner of the first aspect, Or perform the method in the above-mentioned second aspect or any possible implementation manner of the second aspect, or perform the method in the above-mentioned third aspect or any possible implementation manner of the third aspect, or perform the above-mentioned fourth aspect or the first aspect.
  • the method in any possible implementation manner of the four aspects.
  • an embodiment of the present application provides a communication system, where the communication system includes a session management network element configured to execute the first aspect or any possible implementation manner of the first aspect, configured to execute the second aspect or User equipment in any possible implementation manner of the second aspect.
  • the communication system further includes a policy control network element for implementing the third aspect or any possible implementation manner of the third aspect;
  • the communication system includes a session management network element for executing the first aspect or any possible implementation manner of the first aspect, for executing the second aspect or any possible implementation manner of the second aspect.
  • User equipment used for executing the third aspect or the policy control network element in any possible implementation of the third aspect, and for executing the fourth aspect or the target proxy call in any possible implementation of the fourth aspect network element.
  • FIG. 1 exemplarily provides a system architecture of a non-public network for this application
  • 2a is a schematic diagram of a connection relationship between a non-public network and an IMS network provided by the application;
  • 2b is a schematic diagram of a connection relationship between another non-public network and an IMS network provided by this application;
  • FIG. 3 is a schematic flow chart of establishing a session between a user equipment and an IMS network provided by the present application;
  • FIG. 4 is a schematic diagram of a connection relationship between a non-public network and an IMS network provided by the present application
  • 5a is a schematic diagram of a local user server deployed in a non-public network provided by the application
  • FIG. 5b is a schematic diagram of a non-public network provided by the application with a local user server and a proxy call network element having no service provider attribute deployed;
  • FIG. 6 is a schematic flowchart of a communication method provided by the present application.
  • FIG. 7 is a schematic flowchart of a first session connection method exemplarily provided by this application.
  • FIG. 9 is a schematic flowchart of a third session connection method exemplarily provided by the present application.
  • FIG. 10 is a schematic flowchart of a fourth session connection method exemplarily provided by this application.
  • FIG. 11 is a schematic structural diagram of a communication device provided by the application.
  • FIG. 12 is a schematic structural diagram of another communication device provided by the present application.
  • the IMS network mainly involves the following functional entities:
  • the home subscriber server (HSS) is used as a database for user information storage in IMS. It mainly stores user authentication information, specific information of subscribers, dynamic information of subscribers, network policy rules and device identification register information. For mobility management and user service data management. It is a logical entity that can physically consist of multiple physical databases.
  • the call session control function (CSCF) network element is the core part of the IMS and is mainly used for session initiation protocol (SIP) control based on packet switching.
  • the call session control function network element is responsible for processing the user's multimedia session, which can be regarded as a SIP server in the IETF architecture.
  • call session control function network elements are divided into proxy-call session control function (P-CSCF) network elements, interrogation call session control function (interrogation-call session control function, I -CSCF) network element and serving-call session control function (serving-call session control function, S-CSCF) network element, the three functions can be physically separated or independent.
  • P-CSCF proxy-call session control function
  • I -CSCF interrogation-call session control function
  • serving-call session control function serving-call session control function
  • the network element of the proxy call session control function may also be referred to as the proxy call network element
  • the network element of the inquiry call session control function may also be referred to as the inquiry call network element
  • the network element of the service call session control function may also be referred to as the service call session control function network element. Call the network element.
  • Multimedia resource function multimedia resource function (multimedia resource function, MRF) network element, mainly to complete the multi-party call and multimedia conference functions.
  • the multimedia resource function network element is composed of a multimedia resource function controller (MRFC) and a multimedia resource function processor (MRFP), which respectively complete the control and bearer functions of the media stream.
  • the multimedia resource function controller parses the session initiation protocol signaling received from the service call session control function network element, and uses the media gateway control protocol instructions to control the multimedia resource function processor to complete the corresponding media stream encoding and decoding, conversion, mixing and playback Features.
  • Gateway functions including IMS gateway control function (breakout gateway control function, BGCF), media gateway control function (media gateway control function, MGCF), IMS media gateway (IMS media gateway, IMS MGW) and signaling gateway (signaling gateway, SGW).
  • IMS gateway control function breakout gateway control function, BGCF
  • media gateway control function media gateway control function, MGCF
  • IMS media gateway IMS media gateway
  • IMS MGW signaling gateway
  • An independent non-public network that is, the network does not depend on the public land mobile network (PLMN), and is operated by a non-public network exclusive operator.
  • the network element devices in the non-public network all serve the user equipment in the non-public network, and the control plane signaling and user plane data are usually not transmitted to the external network, so as to achieve a certain security and privacy effect.
  • the system architecture of a non-public network includes the following devices or network elements:
  • User equipment also known as terminal equipment, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc.
  • the user equipment is a device that provides voice and/or data connectivity to users.
  • the user equipment may include a handheld device with a wireless connection function, a vehicle-mounted device, or the like.
  • the user equipment may be: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palmtop computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart grid ), wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, etc.
  • the user equipment in FIG. 1 is shown as UE, which is only an example, and does not limit the user equipment.
  • An access network (access network, AN) network element is used to provide wireless access services to the user equipment.
  • the access network device is a device in the communication system that accesses the user equipment to a wireless network.
  • the access network device is a node in a radio access network, which may also be referred to as a base station, or may also be referred to as a radio access network (radio access network, RAN) node (or device).
  • radio access network radio access network
  • access network equipment are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (base band unit, BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc.
  • TRP transmission reception point
  • eNB evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • base transceiver station base transceiver station
  • BTS home base station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • baseband unit base band unit, BBU
  • wireless fidelity wireless fidelity, Wifi
  • the main function of the application function network element is to interact with the 3rd generation partnership project (3GPP) core network to provide services to affect service flow routing, access network capability opening, and policy control.
  • the application function network element may be an application function (application function, AF) network element.
  • the application function network element may still be an AF network element, or there are other The name is not limited in this application.
  • the application function network element is an AF network element, the AF network element may provide a Naf service.
  • the network opening network element can be used to enable 3GPP to securely provide network service capabilities to a third-party AF (for example, a service capability server (services capability server, SCS), an application server (application server, AS), etc.).
  • a third-party AF for example, a service capability server (services capability server, SCS), an application server (application server, AS), etc.
  • the network exposure network element may be a network exposure function (NEF) network element.
  • NEF network exposure function
  • the network exposure network element may still be an NEF network element, Or there are other names, which are not limited in this application.
  • the network open network element is an NEF
  • the NEF can provide Nnef services to other network function network elements.
  • the unified data management network element may be used to manage subscription data of the user equipment, registration information related to the user equipment, and the like.
  • the unified data management network element may be a unified data management (unified data management, UDM) network element.
  • UDM unified data management
  • the unified data management function network element may still be a UDM
  • the network element, or other names, are not limited in this application.
  • the UDM network element may provide Nudm services.
  • the access and mobility management network element can be used to manage the access control and mobility of the user equipment. In practical applications, it includes the mobility management entity in the network framework in the long term evolution (LTE).
  • the access and mobility management function in mobility management entity, MME
  • MME mobility management entity
  • the access management function is added, which can be specifically responsible for the registration of the user equipment, mobility management, tracking area update process, reachability detection, session Manage network element selection, mobility state transition management, etc.
  • the access and mobility management network element may be an access and mobility management function (AMF) network element.
  • AMF access and mobility management function
  • the mobility management network element may still be an AMF network element, or have other names, which are not limited in this application.
  • the AMF may provide Namf services.
  • a session management network element which can be used to be responsible for session management of the user equipment (including session establishment, modification and release), selection and reselection of user plane function network elements, and Internet Protocol (IP) of the user equipment Address allocation, quality of service (quality of service, QoS) control, etc.
  • the session management network element may be a session management function (session management function, SMF) network element.
  • SMF session management function
  • the session management network element may still be an SMF network element, Or there are other names, which are not limited in this application.
  • the SMF can provide Nsmf services.
  • the user plane function (UPF) network element can be responsible for the forwarding and receiving of user data in the user equipment.
  • User data can be received from the data network and transmitted to the user equipment through the access network element; the user plane function network element can also receive the user data from the user equipment through the access network element and forward it to the data network.
  • the transmission resources and scheduling functions that provide services for the user equipment are managed and controlled by the session management function network element.
  • network elements in non-public networks can be co-located.
  • the access and mobility management network element may be co-located with the session management network element; the session management network element may be co-located with the user plane network element.
  • the connection relationship between the non-public network and the IMS network can be referred to as FIG. 2a, a non-public network is only connected to the IMS network, and an IMS network can be connected to one or more non-public networks.
  • IP multimedia private identity IP multimedia private identity, IMPI
  • IP multimedia public identity IP multimedia public identity, IMPU
  • the IMS network can determine which non-public network the user equipment comes from according to the IP multimedia private identifier and the IP multimedia public identifier.
  • Figure 2b exemplarily shows a schematic diagram of the structure of the connection between the IMS network and a non-public network.
  • the non-public network includes user equipment, access network elements, access and mobility management network elements, and user plane function network elements. , a session management network element, a policy control network element, and a unified data management network element.
  • the IMS network includes a home subscriber server, a proxy call network element, and an inquiry/service call network element.
  • One of the non-public networks can only be connected to one IMS network.
  • FIG. 3 is a schematic flowchart of a session establishment between a user equipment and an IMS network provided by the present application.
  • Step 301 the user equipment requests the access and mobility management network element to establish a protocol data unit (protocol data unit, PDU) session.
  • protocol data unit protocol data unit
  • the user equipment sends a non-access stratum (non-access stratum, NAS) message to the access and mobility management network element.
  • the NAS message carries the session identifier (PDU Session ID), the data network name (UE Requested data network name, UE Requested DNN) requested by the user equipment, and the single network slice selection assistance information (Single network slice selection assistance information, S -NSSAI) and other parameters.
  • the UE Requested DNN may be determined by the user equipment based on the service provider to which it belongs. For example, if the user equipment corresponds to service provider A, the UE Requested DNN is the name of the IMS network provided by service provider A.
  • Step 302 the access and mobility management network element selects the session management network element.
  • Step 303 the access and mobility management network element requests the session management network element to establish a PDU session.
  • the access and mobility management network element sends a PDU session creation session context request message to the session management network element.
  • the PDU session creation session context request message carries parameters such as SUPI, UE Requested DNN, and PDU Session ID.
  • the session management network element obtains the session management subscription data from the unified data management network element.
  • Step 305 the session management network element sends a PDU session creation session context response message to the access and mobility management network element.
  • step 306 the PDU session authentication or authorization process.
  • Step 307 the session management network element establishes a session policy association with the policy control network element. Specifically, if a dynamic policy control and charging (policy control and charging, PCC) rule is required, the session management network element selects a policy control network element, and establishes a session policy association with the policy control network element.
  • policy control and charging policy control and charging
  • Step 308 the session management network element selects the user plane function network element. Step 308 is optional.
  • Step 309 the session management network element performs the session policy association modification to the policy control network element.
  • the session management network element sends the IP address allocated for the user equipment to the policy control network element.
  • Step 309 is executed if step 307 is executed.
  • Step 310 the session management network element establishes an N4 connection with the user plane functional network element.
  • Step 311 the session management network element sends an N1N2 message (Namf_Communication_N1N2Message transfer) to the access and mobility management network element.
  • the N1N2 message carries information such as the tunnel endpoint identifier of the user plane functional network element, which will be sent to the access network element to inform the access network element of the destination peer of the uplink data. If the PDU session is for IMS, the session management network element will also carry the address information of the proxy calling network element in the N1N2 message.
  • Step 312 The access and mobility management network element sends the address information of the above-mentioned proxy calling network element to the user equipment.
  • the access and mobility management network element sends a NAS message to the user equipment.
  • the NAS message carries the address information of the above-mentioned proxy calling network element.
  • Step 313 the user equipment requests to establish a connection with the proxy call network element according to the received address of the proxy call network element.
  • the user equipment sends SIP signaling (also referred to as IMS signaling or IMS message) to the proxy call network element.
  • SIP signaling also referred to as IMS signaling or IMS message
  • This SIP signaling is used to request the establishment of a connection with the IMS network.
  • the target address of the SIP signaling is the address of the proxy call network element received by the user equipment.
  • the network can connect multiple IMS networks.
  • the non-public networks are respectively connected to IMS network 1, IMS network 2 and IMS network 3.
  • IMS network 1 is provided by service provider 1
  • IMS network 2 is provided by service provider 2
  • IMS network 3 is provided by service provider 2.
  • Service provider 3 provides, specifically, service provider 1, service provider 2 and service provider 3 respectively correspond to identification information: service provider identification 1 (SP ID1), service provider identification 2 (SP ID2) and service provider identification Trademark ID 3 (SP ID3)
  • IMS network 1 IMS network 2 and IMS network 3 correspond to identification information respectively: IMS network ID 1 (IMS ID1), IMS network ID 2 (IMS ID2) and IMS network ID 3 (IMS ID3)
  • IMS ID 1 IMS network ID1
  • IMS network ID2 IMS network ID2
  • IMS ID3 IMS network ID 3
  • an IMS network can still continue to connect to one or more non-public networks.
  • the non-public network When the user equipment in the non-public network requests to connect to the IMS network, the non-public network needs to determine which IMS network the user equipment requests to connect to (the IMS network the user equipment requests to connect to is referred to as the target IMS network below). Exemplarily, as shown in FIG. 4, if the user equipment belongs to service provider 1, when the user equipment requests to connect to the IMS network, the non-public network determines that the target IMS network is IMS network 1, and then the non-public network establishes the user equipment and the IMS network. 1 session connection.
  • a local subscriber server (IMS HSS) of an IMS network may be deployed in a non-public network, and the local subscriber server stores subscription data of the user equipment in the IMS network.
  • the non-public network uses the unified data management network element and the local user server to determine the service provider information of the target IMS network that the user equipment wants to connect to, thereby determining the target IMS network and the target IMS network.
  • the proxy calls the network element in the network, and the non-public network establishes the connection between the user plane function network element and the proxy call network element, thereby completing the establishment of the PDU session.
  • a local user server and a proxy call network element without service provider attributes may be deployed in a non-public network, where the local user server stores the user equipment in the IMS network.
  • the user plane function network element is connected to the proxy call network element through the N6 interface.
  • the proxy call network element can obtain the service provider information of the user equipment by querying the local user server, so as to determine the target IMS network and the target IMS network based on the service provider information of the user equipment. query the calling network element.
  • the proxy call network element receives the IMS message from the user equipment, the IMS message can be sent to the inquiry call network element in the target IMS network.
  • the present application provides a communication method, wherein a target IMS network is determined from multiple IMS networks not connected to a public network, and a session connection between a user equipment and the target IMS network is established.
  • the method provided by the present application helps to save deployment costs.
  • a corresponding proxy call network element is deployed in each IMS network, there is no need to add a local user server in a non-public network.
  • the target IMS network can be determined from multiple IMS networks without deploying a local user server in a non-public network.
  • a corresponding proxy call network element is deployed in each IMS network.
  • the first architecture can refer to FIG. 5a, and there is no need to deploy a local user server in a non-public network.
  • a proxy call network element without service provider attributes is deployed in the non-public network.
  • For the second architecture refer to FIG. 5b, and there is no need to deploy a local user server in the non-public network.
  • the flowchart involves a non-public network and multiple IMS networks connected to the non-public network, and the non-public network determines a target IMS network from the multiple IMS networks, wherein the target IMS network is determined by the service provider of the user equipment ( can be referred to as the target service provider).
  • the non-public network includes session management network elements, access and mobility management network elements, policy control network elements, user equipment, access network network elements, etc.
  • the IMS network includes query call network elements.
  • the proxy call network element may be in a non-public network or an IMS network.
  • Step 601 the user equipment sends first information to the session management network element.
  • the first information is used to indicate a target IMS network to which the user equipment requests to connect.
  • the first information may be directly sent by the user equipment to the session management network element, or sent by the user equipment to the session management network element via the access and mobility management network element.
  • the first information may be sent by the user equipment when requesting to establish a session connection, or may be sent by the user equipment before requesting to establish a session connection.
  • the user equipment sends a PDU session establishment request message (NAS message) to the access and mobility management network element, where the PDU session establishment request message includes first information, and the access and mobility management network element selects the session management network element, and then send the first information to the session management network element.
  • the access and mobility management network element sends a PDU session creation session context request message to the session management network element, and the PDU session creation session context request message includes the first information.
  • the first information may include identification information of the target service provider and/or first call information.
  • the identification information of the target service provider may specifically be any information that can be used to characterize the service provider providing the target IMS network service, such as the target service provider identification, the target operator identification, and the target operator network identification.
  • the first call information is used to indicate that the target agent calls a network element in the target IMS network.
  • the first call information may be address information of the target agent to call the network element in the target IMS network.
  • the user equipment may send the identification information of the target service provider as the first information to the session management network element.
  • the user equipment may first obtain the first set, where the first set includes the identification information of the service provider to which each IMS network belongs among the multiple IMS networks connected to the non-public network.
  • the user equipment determines the identification information of the service provider requested by the user equipment (ie, the identification information of the target service provider) from the first set, and sends the identification information of the target service provider to the session management network element.
  • the first set includes SP ID1, SP ID2 and SP ID3. If the user equipment corresponds to service provider 1, the user equipment determines the SP ID1 from the first set, and sends the SP ID1 to the session management network element.
  • the first set may be obtained by the user equipment from an access network element, an access and mobility management network element, or a session management network element.
  • the first set may be sent by the access network element to the user equipment, and the access network element may be sent based on a request of the user equipment, or may be broadcast to the user equipment.
  • the first set may be carried in a radio resource control (RRC) message sent by the access network element to the user equipment, or a medium access control control element (MAC CE) of the media access control layer, or Downlink control information (downlink control information, DCI).
  • RRC radio resource control
  • MAC CE medium access control control element
  • DCI Downlink control information
  • the user equipment may send first request information to the access and mobility management network element, where the first request information is used to request the access and mobility management network element for the first set.
  • the access and mobility management network element receives the first request information, and sends the first response information including the first set to the user equipment.
  • the access and mobility management network element may obtain the first set from the session management network element.
  • the first request information may be carried in a NAS message sent by the user equipment to the access and mobility management network element, and the first request information may be used as a separate NAS message, or may be carried in an existing NAS message.
  • NAS message may be carried in a NAS message sent by the access and mobility management network element to the user equipment, and the first response information may be used as a separate NAS message, or may be carried in an existing NAS message.
  • the purpose of obtaining the first set by the user equipment is to determine whether there is a target IMS network that provides services for the user equipment among the multiple IMS networks not connected to the public network. Therefore, if the user equipment determines that there are users in the first set If the identification information of the service provider to which the device belongs, it is determined that a target IMS network exists in multiple IMS networks, and the user equipment can establish a session connection through a non-public network to obtain IMS services provided by the target IMS network. If the user equipment determines that the target IMS network does not exist in the multiple IMS networks, it may determine that a session connection cannot be established through a non-public network to obtain the IMS service provided by the target IMS network.
  • the user equipment can also directly use the identification information of its own service provider as the first information, and the non-public network can determine whether a target IMS network exists in the multiple IMS networks, that is, determine whether the user equipment can be established with the target IMS network. session connection between.
  • the user equipment can send the SPID1 to the session management network element, wherein the IMS network 1 provided by the service provider 1 indicated by the SPID1, if the non-public network determines that the IMS network 1 exists in the multiple IMS networks according to the SPID1, then establish A session connection between the user equipment and the IMS network 1 .
  • the first information may be data network name information.
  • the data network name information corresponding to the IMS network in the prior art is specifically "IMS", which does not contain the identification information of the target service provider, while the data network name information in this solution is enhanced data network name information.
  • IMS data network name information
  • the user equipment sends the data network name information to the session management network element, and the session management network element can obtain the identification information of the target service provider according to the data network name information.
  • the data network name information may be obtained by the user equipment from an access network element, an access and mobility management network element, or a session management network element.
  • the network element of the access network broadcasts the second set, where the second set includes data network name information corresponding to each IMS network in the multiple IMS networks connected to the non-public network, wherein the data network name corresponding to each IMS network
  • the information includes identification information of the service provider to which the IMS network belongs.
  • the user equipment determines the data network name information from the second set according to the service provider to which it belongs.
  • the data network name information corresponding to IMS network 1, IMS network 2 and IMS network 3 are DNN1 (including SP ID1), DNN2 (including SP ID2) and DNN3 (including SP ID3), the access network element
  • the second set of broadcasts includes DNN1, DNN2, and DNN3. If the user equipment corresponds to service provider 1, the user equipment determines DNN1 from the second set, and sends DNN1 to the session management network element.
  • the second set may further include service providers corresponding to the DNN, for example, the second set includes (SP ID1 and DNN1), (SP ID2 and DNN2), and (SP ID3 and DNN3), and the user equipment receives In the second set, according to the service provider 1 corresponding to the user equipment, the DNN1 corresponding to the SPID1 is determined from the second set, and the DNN1 is sent to the session management network element.
  • the second set includes (SP ID1 and DNN1), (SP ID2 and DNN2), and (SP ID3 and DNN3)
  • the user equipment receives In the second set, according to the service provider 1 corresponding to the user equipment, the DNN1 corresponding to the SPID1 is determined from the second set, and the DNN1 is sent to the session management network element.
  • the user equipment sends second request information to the access and mobility management network element, where the second request information is used to request the access and mobility management network element for the data network name of the IMS network provided by the target service provider information, wherein the second request information includes identification information of the target service provider.
  • the second request information may also include identification information of the target service provider and first indication information, wherein the first indication information is used to indicate that the second request information is used to request the IMS network provided by the target service provider.
  • a request message for data network name information may also include identification information of the target service provider and first indication information, wherein the first indication information is used to indicate that the second request information is used to request the IMS network provided by the target service provider.
  • the access and mobility management network element determines whether there is data network name information corresponding to the identification information of the target service provider in the access and mobility management network element according to the identification information of the target service provider in the second request information. If yes, send the second response information including the data network name information to the user equipment, if not, after acquiring the data network name information from the session management network element, send the data network name information to the user equipment. Second response information.
  • the access and mobility management network element sends the identification information of the target service provider to the session management network element, and the session management network element sends the identification information of the target service provider to the access and mobility management network element according to the identification information of the target service provider.
  • the access and mobility management network element may also send second indication information to the session management network element, where the second indication information is used to instruct the session management network element to send the data network element to the access and mobility management network element. name information.
  • the user equipment sends the second request information to the access and mobility management network element, wherein the second request information includes SP ID1, and the access and mobility management network element determines according to the SP ID1 in the second request information If there is no DNN1 corresponding to the SPID1 in the access and mobility management network element, the DNN1 is obtained from the session management network element, and the DNN1 is sent to the user equipment.
  • the user equipment may send the first call information as the first information to the session management network element.
  • a corresponding proxy call network element is deployed in each IMS network, and the non-public network determines the target proxy call network element and the target IMS network to which the target proxy call network element belongs according to the first information.
  • proxy call information corresponding to IMS network 1 , IMS network 2 and IMS network 3 are proxy call information 1 , proxy call information 2 and proxy call information 3 respectively.
  • the user equipment sends proxy call information 1 to the session management network element, and the session management network element determines the target IMS network as the IMS network 1 according to the proxy call information 1, and selects a user plane function network element that can establish a connection with the IMS network 1.
  • the user equipment may determine the first call information in the following manners 1 and 2.
  • Manner 1 The user equipment is obtained from the network element of the access network.
  • the network element of the access network may broadcast a third set (also referred to as third information) to the user equipment, where the third set includes the identification of the service provider to which each IMS network belongs to among the multiple IMS networks not connected to the public network information and corresponding proxy call information, the user equipment determines the corresponding proxy call information according to the identification information of the service provider to which it belongs, and the proxy call information is the first call information.
  • third information also referred to as third information
  • the third set includes SPID1 corresponding to IMS network 1 and proxy call information 1, SPID2 corresponding to IMS network 2 and proxy call information 2, and SPID3 corresponding to IMS network 3 and proxy call information 3. If the service provider to which the user equipment belongs corresponds to the SP ID1, the user equipment determines from the third set that the proxy call information 1 is the first information.
  • the purpose of obtaining the third set by the user equipment is to determine whether there is a target IMS network providing services for the user equipment among the multiple IMS networks not connected to the public network. Therefore, if the user equipment determines that the identification information of the service provider to which the user equipment belongs exists in the third set, it determines that a target IMS network exists in multiple IMS networks, and the user equipment can establish a session connection through a non-public network to obtain the target IMS network IMS services provided. If the user equipment determines that the target IMS network does not exist in the multiple IMS networks, it may determine that a session connection cannot be established through a non-public network to obtain the IMS service provided by the target IMS network.
  • the user equipment is obtained from a domain name system server (domain name system server, DNS server).
  • domain name system server domain name system server, DNS server
  • the user equipment may request the first call information from the domain name system server.
  • the user equipment is pre-configured with domain name information of the IMS network provided by the service provider to which it belongs (ie, domain name information of the target IMS network).
  • the domain name information of the target IMS network may be ims.mnc99.mcc999.3gppnetwork.org; wherein mnc represents the mobile network code (mobile network code), which is the code of the operator network in a country; mcc represents the mobile country code ( mobile country code), is a three-digit code that uniquely specifies a country.
  • the domain name information indicates an IMS network provided by an operator with a mobile network code of 99 in a country with a mobile country code of 999.
  • the user equipment sends third request information to the domain name system server, where the third request information includes the domain name information of the target IMS network and the identification information of the non-public network, wherein the identification information of the non-public network may be the network identification of the non-public network (such as Public land mobile network identity (public land mobile network identity, PLMN ID) + network identifier (network identifier, NID).
  • the identification information of the non-public network may be the network identification of the non-public network (such as Public land mobile network identity (public land mobile network identity, PLMN ID) + network identifier (network identifier, NID).
  • the domain name system server receives the third request information, according to the domain name information and non-public domain name information of the target IMS network in the third request information
  • the identification information of the network to determine the proxy call information (that is, the first call information) corresponding to the target IMS network domain name, the proxy call network element indicated by the first call information is connected to the non-public network, and the domain name system server will contain the first call information.
  • the third response message of the message is sent to the user equipment.
  • the domain name system server determines that there is no proxy call information corresponding to the target IMS network domain name
  • the third response information fed back to the user equipment is used to indicate that the query fails, or that the target IMS network is not connected to the non-public network.
  • the domain name system server may be deployed in the session management network element, or the session management network element has the function of the domain name system server.
  • the user equipment obtains the first call information from the domain name system server, which is equivalent to that the user
  • the device obtains the first call information from the session management network element.
  • the user equipment may acquire the first call information from the session management network element through a control plane message or a user plane message.
  • a first correspondence relationship is pre-obtained in the session management network element, and the first correspondence relationship includes information corresponding to each IMS network among the multiple IMS networks connected to the non-public network.
  • the identification information of the service provider and the proxy call information (such as the address information of the proxy call network element).
  • the user equipment sends first call information to the session management network element, where the first call information may implicitly indicate the target service provider to which the user equipment belongs, or implicitly indicate the identification information of the target service provider to which the user equipment belongs.
  • a first correspondence relationship includes identification information and proxy call information of service providers corresponding to IMS network 1 to IMS network 3 respectively. If the first call information is proxy call address information 1 (P-CSCF IP1), it can indicate that the target service provider to which the user equipment belongs is service provider 1, and the identification information of the target service provider to which it belongs is SP ID1.
  • P-CSCF IP1 proxy call address information 1
  • the user equipment sends the identification information of the target service provider and the first call information together as the first information to the session management network element, wherein the proxy call information corresponding to the target IMS network provided by the target service provider That is, the first call information.
  • the proxy call information corresponding to the target IMS network provided by the target service provider That is, the first call information.
  • Step 602 the session management network element determines first call information according to the first information.
  • the first information includes identification information of the target service provider.
  • a corresponding proxy call network element is deployed in each IMS network, and the session management network element determines the first call information according to the identification information of the target service provider included in the first information, and the first call information indicates
  • the target proxy-calling network element ie, the proxy-calling network element in the target IMS network
  • the target proxy-calling network element is equivalent to the session management network element determining the target IMS network from multiple IMS networks connected to the non-public network.
  • the session management network element includes a first correspondence relationship, and the session management network element determines, according to the identification information of the target service provider, a corresponding relationship with the identification information of the target service provider from the first correspondence relationship.
  • the proxy call information is the first call information. Taking the example of Table 1 above, if the first information includes the identification information of the target service provider as SPID1, the session management network element can determine that the first call information is P-CSCF IP1.
  • a proxy call network element without service provider attribute is deployed in a non-public network
  • the session management network element can determine the proxy call network element without service provider attribute deployed in the non-public network based on the identification information of the service provider.
  • Proxy call information also referred to as the first call information
  • Case 2 The first information includes the first call information.
  • the session management network element may determine the first call information from the first information.
  • the first information may also include the identification information of the target service provider and the first call information.
  • the identification information of the target service provider may also include the identification information of the target service provider and the first call information.
  • Step 603 the session management network element sends the first call information to the user equipment.
  • the user equipment receives the first call information from the session management network element, and the user equipment can determine the destination address information of the IMS message according to the first call information.
  • the user equipment may send an IMS message to the target proxy call network element to obtain the IMS service provided by the target IMS network.
  • a non-public network connects multiple IMS networks, and provides respective IMS network services for user equipments of different service providers.
  • the user equipment sends the first information to the session management network element, the first information may include the identification information of the target service provider and/or the first call information, and the session management network element may determine the connection request of the user equipment based on the first information.
  • the target IMS network is established, thereby establishing a session connection between the user equipment and the target IMS network, without adding a local user server in the non-public network, which helps to reduce deployment costs.
  • the user equipment can use the existing session establishment process, without adding additional information elements or parameters, the non-public network can know the IMS network that the user equipment requests to connect to, and complete the session establishment.
  • a proxy call network element without service provider attributes is deployed in a non-public network, although the user equipment calls a target proxy without service provider attributes in the non-public network according to the first call information
  • the network element sends an IMS message, but the target proxy call network element is connected to IMS networks provided by multiple service providers respectively.
  • the target interrogation calling network element in the target IMS network Before sending the IMS message to the target query call network element in the target IMS network The target interrogation calling network element in the target IMS network.
  • the target proxy calls the network element to obtain the target association relationship
  • the target association relationship includes the identification information of the user equipment and the inquiry call information corresponding to the user equipment.
  • the identification information of the user equipment may be an IP address of the user equipment or an identification (Identity, ID) of the user equipment.
  • the inquiry call information corresponding to the user equipment may be address information of the inquiry call network element in the IMS network corresponding to the service provider to which the user equipment belongs.
  • Table 2 is a target association relationship obtained by the target agent calling the network element.
  • Table 2 includes the identification information of the user equipment and the inquiry call information corresponding to the user equipment.
  • One or more of the user equipments may correspond to the same inquiry call information.
  • the target association relationship may further include identification information of the service provider to which the user equipment belongs.
  • Table 3 is another target association relationship obtained by the target agent calling the network element. Table 3 includes the identification information of the user equipment, the identification information of the service provider to which the user equipment belongs, and the inquiry call information corresponding to the user equipment. One or more user equipments may correspond to the same inquiry call information, and one or more user equipments may correspond to the same service provider identification information.
  • Identification information of user equipment Service Provider Identification Information Ask for call information UE IP 1 SP ID1 I-CSCF IP1 UE IP 2 SP ID2 I-CSCF IP2 UE IP 3 SP ID3 I-CSCF IP3 UE IP 4 SP ID3 I-CSCF IP3 UE IP5 SP ID3 I-CSCF IP3
  • the target proxy call network element receives the IMS message, it can determine the inquiry call information (ie the second call information) corresponding to the identification information of the user equipment from the target association according to the identification information of the user equipment in the IMS message, and An IMS message is sent to the query calling network element corresponding to the second call information.
  • the inquiry call information ie the second call information
  • the target proxy calling network element determines that the second call information is I-CSCF IP1, and the target proxy calling network element queries the calling network element corresponding to I-CSCF IP1 Send the IMS message.
  • the target proxy call network element may obtain the target association relationship from the session management network element or the policy control network element.
  • the target association relationship may also be configured on the target agent calling network element.
  • the session management network element or the policy control network element determines the target association relationship, and sends the target association relationship to the target proxy call network element. It is explained in the following cases.
  • the target proxy call network element, or the session management network element, or the policy control network element can obtain a second correspondence, and the second correspondence includes each IMS in the multiple IMS networks connected to the non-public network.
  • the identification information and inquiry call information of the service provider corresponding to the network, as shown in Figure 4, as shown in Table 4 is a second correspondence relationship, the second correspondence relationship includes services corresponding to IMS network 1 to IMS network 3 respectively Provider's identification information and inquiry call information.
  • the session management network element determines the target association relationship.
  • the user equipment sends first information to the session management network element, where the first information includes identification information of the target service provider, and the session management network element combines the identification information of the target service provider and the identification information of the user equipment in combination with the identification information of the target service provider.
  • Two corresponding relationships determine the association between the identification information of the user equipment and the inquiry call information, that is, the target association shown in Table 2; or determine the identification information of the user equipment, the identification information of the service provider to which it belongs, and the inquiry call information.
  • the association relationship that is, the target association relationship shown in Table 3.
  • the session management network element sends the target association relationship to the target proxy call network element, or the session management network element sends the target association relationship to the target proxy call network element via the policy control network element.
  • the policy control network element determines the target association relationship.
  • the user equipment sends first information to the session management network element, where the first information includes the identification information of the target service provider, and the session management network element sends the identification information including the target service provider and the user to the policy control network element.
  • the second information of the identification information of the device receives the second information, and in combination with the second corresponding relationship, determines the association between the identification information of the user equipment and the inquiry call information, that is, the target association shown in Table 2; or determines the identification information of the user equipment, belonging to The association relationship between the identification information of the service provider and the inquiry call information, that is, the target association relationship shown in Table 3.
  • the policy control network element sends the target association relationship to the target proxy call network element.
  • the target agent calls the network element to determine the target association relationship.
  • the user equipment sends first information to the session management network element, where the first information includes the identification information of the target service provider, and the session management network element sends the identification information including the target service provider and the target proxy call network element to the target proxy call network element.
  • the second information of the identification information of the user equipment, or the second information is sent to the target proxy call network element through the policy control network element.
  • the target agent calls the network element to receive the second information, and in combination with the second correspondence, determines the association between the identification information of the user equipment and the inquiry call information, that is, the target association shown in Table 2; or determines the identification information of the user equipment, The associated relationship between the identification information of the affiliated service provider and the inquiry call information, that is, the target associated relationship shown in Table 3.
  • a non-public network connects multiple IMS networks, and provides respective IMS network services for user equipments of different service providers.
  • the proxy call network element can determine the inquiry call network element based on the target association relationship, so as to send the inquiry call network element from the user equipment. IMS messages.
  • FIG. 7 exemplarily provides the first flow chart of establishing a session connection between a user equipment and a target IMS network.
  • This embodiment can be applied to each IMS network in the first architecture. The case where the corresponding proxy call network element is deployed.
  • the first information includes identification information of the target service provider, and the non-public network determines, according to the identification information of the target service provider, the first call information used to instruct the target agent to call the network element.
  • the first call information is used to establish a session connection between the user equipment and the target IMS network.
  • Step 701 the user equipment sends a session establishment request message to the access and mobility management network element.
  • the user equipment sends a NAS message to the access and mobility management network element, which includes parameters such as session identifier, data network name requested by the user equipment, slice information, and identification information of the target service provider.
  • the access and mobility management network element selects a session management network element.
  • Step 703 The access and mobility management network element sends a session context creation request message to the session management network element.
  • the access and mobility management network element sends a PDU session creation session context request message to the session management network element.
  • the PDU session creation session context request message carries parameters such as the session identifier, the data network name requested by the user equipment, and also includes the identifier information of the target service provider.
  • Step 704 the session management network element sends a create session context response message to the access and mobility management network element.
  • the session management network element sends a PDU session creation session context response message to the access and mobility management network element.
  • Step 705 the session management network element selects the user plane function network element.
  • the session management network element selects a user plane function network element connected to the IMS network provided by the target service provider from a plurality of user plane function network elements according to the identification information of the target service provider.
  • Step 706 the session management network element establishes an N4 connection with the user plane function network element.
  • Step 707 The session management network element determines the first call information according to the first correspondence and the identification information of the target service provider.
  • Step 708 the session management network element sends the first call information to the access and mobility management network element.
  • the session management network element sends an N1N2 message (Namf_Communication_N1N2Message transfer) to the access and mobility management network element, where the N1N2 message includes the first call information.
  • Step 709 The access and mobility management network element sends the first call information to the user equipment.
  • the access and mobility management network element sends a NAS message to the user equipment.
  • the NAS message carries the above-mentioned first call information.
  • Step 710 the user equipment requests to establish a connection with the target proxy call network element according to the received first call information.
  • the user equipment sends SIP signaling (also referred to as IMS signaling or IMS message) to the target proxy call network element according to the received first call information.
  • SIP signaling also referred to as IMS signaling or IMS message
  • This SIP signaling is used to request the establishment of a connection with the IMS network.
  • the target address of the SIP signaling is the address of the target proxy call network element indicated by the first call information.
  • the present application provides a second schematic flowchart of establishing a session connection between a user equipment and a target IMS network.
  • the corresponding agent calls the network element.
  • the first information is data network name information, wherein the data network name information includes the identification information of the target service provider, and the non-public network determines the first information used to instruct the target agent to call the network element according to the identification information of the target service provider. Call information, thereby establishing a session connection between the user equipment and the target IMS network.
  • Step 801 the user equipment may acquire data network name information based on the method in Example 1 or Example 2 below.
  • Example 1 the user equipment obtains the data network name information from the access and mobility management network element, and may refer to the following steps 801-1 to 801-5.
  • Step 801-1 the user equipment sends the second request information to the access and mobility management network element, including the identification information of the target service provider, exemplarily, the second request information may be carried in the NAS message, the NAS Specifically, the message may be a registration request message sent by the user equipment to the access and mobility management network element in the registration process.
  • Step 801-2a if there is data network name information corresponding to the identification information of the target service provider in the access and mobility management network element, step 801-5 is executed.
  • Step 801-2b if there is no data network name information corresponding to the identification information of the target service provider in the access and mobility management network element, perform steps 801-3 to 801-5.
  • Step 801-3 the access and mobility management network element sends the identification information of the target service provider to the session management network element.
  • Step 801-4 the session management network element sends data network name information to the access and mobility management network element.
  • the information between the access and mobility management network element and the session management network element may be carried in the Nsmf message.
  • Step 801-5 the access and mobility management network element sends data network name information to the user equipment.
  • Example 2 where the user equipment obtains the data network name information from the access network element, reference may be made to the following steps 801-6 and 801-7.
  • Step 801-6 the network element of the access network broadcasts a second set, where the second set includes data network name information corresponding to each IMS network in the multiple IMS networks connected to the non-public network.
  • Step 801-7 the user equipment determines the data network name information corresponding to the service provider it belongs to from the second set.
  • Step 802 the user equipment sends a session establishment request message to the access and mobility management network element.
  • the user equipment sends a NAS message to the access and mobility management network element, including parameters such as session identifier, data network name information, slice information, and the data network name information includes identification information of the target service provider.
  • the access and mobility management network element selects the session management network element.
  • Step 804 the access and mobility management network element sends a session context creation request message to the session management network element.
  • the access and mobility management network element sends a PDU session creation session context request message to the session management network element, which carries parameters such as session identifier, data network name information, slice information, and the data network name information includes the target service. Provider's identifying information.
  • Step 805 the session management network element sends a create session context response message to the access and mobility management network element.
  • the session management network element sends a PDU session creation session context response message to the access and mobility management network element.
  • Step 806 the session management network element selects the user plane function network element.
  • the session management network element selects a user plane function network element connected to the target IMS network provided by the target service provider from a plurality of user plane function network elements according to the identification information of the target service provider in the data network name information.
  • Step 807 the session management network element establishes an N4 connection with the user plane functional network element.
  • Step 808 the session management network element determines the first call information according to the first correspondence and the identification information of the target service provider.
  • Step 809 the session management network element sends the first call information to the access and mobility management network element.
  • the session management network element sends an N1N2 message (Namf_Communication_N1N2Message transfer) to the access and mobility management network element, where the N1N2 message includes the first call information.
  • Step 810 the access and mobility management network element sends the first call information to the user equipment.
  • Step 811 the user equipment requests to establish a connection with the target proxy call network element according to the received first call information.
  • the user equipment sends SIP signaling (also referred to as IMS signaling or IMS message) to the target proxy call network element according to the received first call information.
  • SIP signaling also referred to as IMS signaling or IMS message
  • This SIP signaling is used to request the establishment of a connection with the IMS network.
  • the target address of the SIP signaling is the address of the target proxy call network element indicated by the first call information.
  • the present application provides a third schematic flow chart of establishing a session connection between a user equipment and a target IMS network.
  • the corresponding agent calls the network element.
  • the first information includes first call information, the first call information is used to instruct the target agent to call a network element, and the non-public network establishes a session connection between the user equipment and the target IMS network according to the first call information.
  • Step 901 the user equipment may acquire the first call information based on the method in the following example 1 or example 2.
  • Example 1 the user equipment obtains the first call information from the domain name system server, and may refer to the following steps 901-1 and 901-2.
  • Step 901-1 the user equipment sends third request information to the domain name system server, which includes the domain name information of the target IMS network and the identification information of the non-public network.
  • Step 901-2 the domain name system server determines the proxy call information (ie the first call information) corresponding to the target IMS network domain name according to the domain name information of the target IMS network and the identification information of the non-public network, and the domain name system server sends the first call information to the user equipment. call information.
  • the user equipment acquires the first call information from the network element of the access network, and may refer to the following steps 901-3 and 901-4.
  • Step 901-3 the access network element broadcasts a third set, where the third set includes the identification information of the service provider to which each IMS network belongs among the multiple IMS networks not connected to the public network and the corresponding proxy call information.
  • Step 901-4 the user equipment determines the first call information from the third set.
  • Step 902 the user equipment sends a session establishment request message to the access and mobility management network element.
  • the user equipment sends a NAS message to the access and mobility management network element, which includes parameters such as a session identifier, a data network name requested by the user equipment, slice information, etc., and also includes first call information.
  • the first call information may be Indicates the identification information of the target service provider.
  • the access and mobility management network element selects the session management network element.
  • Step 904 the access and mobility management network element sends a session context creation request message to the session management network element.
  • the access and mobility management network element sends a PDU session creation session context request message to the session management network element, which includes parameters such as the session identifier, the data network name requested by the user equipment, and slice information, and also includes the first call information.
  • Step 905 the session management network element sends a create session context response message to the access and mobility management network element.
  • the session management network element sends a PDU session creation session context response message to the access and mobility management network element.
  • Step 906 the session management network element selects the user plane function network element.
  • the session management network element selects a user plane function network element connected to the IMS network provided by the target service provider from a plurality of user plane function network elements according to the identification information of the target service provider.
  • the session management network element may determine the identification information of the target service provider according to the first call information.
  • Step 907 the session management network element establishes an N4 connection with the user plane functional network element.
  • Step 908 the session management network element sends the first call information to the access and mobility management network element.
  • the session management network element sends an N1N2 message (Namf_Communication_N1N2Message transfer) to the access and mobility management network element.
  • the N1N2 message includes the first call information.
  • Step 909 the access and mobility management network element sends the first call information to the user equipment.
  • Step 910 the user equipment requests to establish a connection with the target proxy call network element according to the received first call information.
  • the user equipment sends SIP signaling (also referred to as IMS signaling or IMS message) to the target proxy call network element according to the received first call information.
  • SIP signaling also referred to as IMS signaling or IMS message
  • This SIP signaling is used to request the establishment of a connection with the IMS network.
  • the target address of the SIP signaling is the address of the target proxy call network element indicated by the first call information.
  • the present application provides a fourth schematic flow chart of establishing a session connection between a user equipment and a target IMS network.
  • This embodiment can be applied to the deployment of no service provider in a non-public network in the second architecture. Attribute of the agent calling the network element.
  • the first information includes identification information of the target service provider, and the non-public network determines the second call information according to the identification information of the target service provider, so as to send the IMS message from the user equipment to the target IMS network.
  • Step 1001 the user equipment sends a session establishment request message to the access and mobility management network element.
  • the user equipment sends a NAS message to the access and mobility management network element, which includes parameters such as a session identifier, a data network name requested by the user equipment, and further includes identification information of the target service provider.
  • the access and mobility management network element selects a session management network element.
  • Step 1003 the access and mobility management network element sends a session context creation request message to the session management network element.
  • the access and mobility management network element sends a PDU session creation session context request message to the session management network element, which includes the session identifier, the data network name requested by the user equipment, slice information, and identification information of the target service provider.
  • Step 1004 the session management network element sends a create session context response message to the access and mobility management network element.
  • the session management network element sends a PDU session creation session context response message to the access and mobility management network element.
  • Step 1005 the session management network element establishes a session policy association with the policy control network element.
  • Step 1006 the session management network element selects the user plane function network element.
  • the session management network element selects a user plane function network element connected to the IMS network provided by the target service provider from a plurality of user plane function network elements according to the identification information of the target service provider.
  • Step 1007 the session management network element establishes an N4 connection with the user plane function network element.
  • Step 1008 the session management network element and the policy control network element perform session policy association modification.
  • the session management network element sends the identification information of the user equipment and the identification information of the target service provider to the policy control network element, and the policy control network element determines the target association relationship, and the target association relationship includes the identification information of the user equipment and the target service provider.
  • Step 1009 the policy control network element sends the target association relationship to the target proxy call network element.
  • Steps 1008 and 1009 may refer to the description of Case 2 in the description of FIG. 6 .
  • Step 1010 the session management network element determines the first call information according to the identification information of the target service provider.
  • the first call information is used to instruct the target agent to call the network element.
  • Step 1011 the session management network element sends the first call information to the access and mobility management network element.
  • the session management network element sends an N1N2 message (Namf_Communication_N1N2Message transfer) to the access and mobility management network element.
  • the N1N2 message includes the first call information.
  • Step 1012 the access and mobility management network element sends the first call information to the user equipment.
  • Step 1013 the user equipment requests to establish a connection with the target proxy call network element according to the received first call information.
  • the user equipment sends SIP signaling (also referred to as IMS signaling or IMS message) to the proxy call network element.
  • SIP signaling is used to request to establish a connection between the user equipment and the IMS network.
  • the target address of the SIP signaling is the address of the target proxy call network element indicated by the first call information
  • the source address of the SIP signaling is the IP address of the user equipment.
  • the proxy call network element determines the inquiry call information corresponding to the SIP signaling according to the acquired target association, and sends the SIP signaling to the inquiry call network element corresponding to the inquiry call information.
  • the above steps 1008 and 1009 take the determination of the target association relationship by the policy control network element as an example.
  • the session management network element may also determine the target association relationship, and send the target association relationship to the policy control network element, and then the policy control network element sends the target association relationship to the target proxy call network element.
  • the target association may also be determined by the target agent calling the network element.
  • the session management network element may send the identification information of the user equipment and the identification information of the target service provider to the policy control network element, and then the policy control network element sends the identification information of the user equipment and the target service provider to the target proxy call network element.
  • the identifier information of the provider is used, and the target agent calls the network element to determine the target association relationship. For details, refer to the description of Case 3 in the description of FIG. 6 .
  • this embodiment of the present invention does not limit the order of execution of steps 1008 and 1009 and subsequent steps 1010 to 1013 .
  • each device/network element may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module . Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • each functional module in each embodiment of the present application may be integrated into one processor, or may exist physically alone, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • FIG. 11 and FIG. 12 are schematic structural diagrams of possible communication apparatuses provided by the present application. These communication apparatuses can be used to implement the functions of the session management network element, or the user equipment, or the policy control network element, or the target proxy call network element in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be a session management network element, or user equipment, or a policy control network element, or a target proxy call network element as shown in A device, or a policy control network element, or a component (such as a chip or circuit) in the target agent call network element.
  • the communication device 1100 includes a processing module 1101 and a transceiver module 1102 .
  • the processing module 1101 is configured to control the transceiver module 1102 to receive the first information from the user equipment, the apparatus and the user equipment are located in a non-public network, and the non-public network is connected to multiple IMS networks, and the first information is used for Indicates the target IMS network to which the user equipment requests to connect, the target IMS network is one of the multiple IMS networks, and the target IMS network is provided by the target service provider; the processing module 1101 is further configured to the first information, determine the first call information, the first call information indicates that the target agent calls the network element, and the first call information is used to establish the connection between the user equipment and the target IMS network; the processing module 1101 is further configured to control the transceiver module 1102 to send the first call information to the user equipment.
  • the first information includes identification information of the target service provider, and/or the first call information.
  • the first information is data network name information
  • the data network name information includes identification information of the target service provider.
  • the target proxy calling network element is located in the non-public network
  • the processing module 1101 is further configured to control the transceiver module 1102 to call the target proxy network element or a policy control network element Sending second information; wherein the second information includes identification information of the user equipment and identification information of the target service provider, and the second information is used to indicate that the target proxy call network element will
  • the IMS message of the user equipment is sent to the target query calling network element of the target IMS network.
  • the second information further includes second call information used to indicate the target inquiring call network element.
  • the target proxy call network element is located in the non-public network
  • the processing module 1101 is further configured to determine the target service provider according to the corresponding relationship between service providers and query call information the second call information corresponding to the quotient; determine a target association relationship, where the target association relationship includes the association relationship between the identification information of the user equipment and the second call information, or the target association relationship includes the user equipment The associated relationship between the identification information, the second call information and the identification information of the target service provider; the processing module 1101 is further configured to control the transceiver module 1102 to call a network element or a policy control network to the target agent The meta sends the target association.
  • the processing module 1101 is configured to control the transceiver module 1102 to send first information to a session management network element, where the apparatus and the session management network element are located in a non-public network, the non-public network is connected to multiple IMS networks, the first information is The information is used to indicate the target IMS network to which the device requests to connect, the target IMS network is one of the multiple IMS networks, and the target IMS network is provided by the target service provider; the processing module 1101 is further configured to Control the transceiver module 1102 to receive the first call information from the session management network element, the first call information indicates that the target proxy calls the network element, and the first call information is used to establish the device and the target IMS network connection.
  • the first information includes identification information of the target service provider, and/or the first call information.
  • the first information is data network name information
  • the data network name information includes identification information of the target service provider.
  • the data network name information is that the processing module 1101 controls the transceiver module 1102 from the access and mobility management network element or the session management network element or the access network element obtained.
  • the first information includes the first call information
  • the processing module 1101 controls the transceiver module 1102 to send the first information to the session management network element
  • the processing module 1101 is further configured to control the The transceiver module 1102 receives third information from an access network element, where the third information includes the first service provider and proxy call information corresponding to the first service provider, and the first service provider The corresponding proxy call information is the first call information.
  • the first information includes the first call information
  • the processing module 1101 controls the transceiver module 1102 to send the first information to the session management network element
  • the processing module 1101 is further configured to control the
  • the transceiver module 1102 sends a query request to the DNS server, and receives a query response from the DNS server, where the query request includes the identification information of the non-public network, the query response includes the first call information, and the query response includes the first call information.
  • the target proxy call network element is located in the target IMS network and connected to the non-public network.
  • the processing module 1101 is configured to control the transceiver module 1102 to receive second information from the session management network element, where the second information includes the identification information of the user equipment and the identification information of the target service provider; the processing module 1101 further For determining a target association relationship according to the corresponding relationship between the service provider and the inquiry call information and the second information, the target association relationship includes the association relationship between the identification information of the user equipment and the second call information, or The target association relationship includes the association relationship between the identification information of the user equipment, the second call information, and the identification information of the target service provider, the second call information indicates the target inquires the calling network element, the target inquires The calling network element is located in the target IMS network, and the target query calling network element is connected to the target proxy calling network element in the non-public network; the processing module 1101 is further configured to control the transceiver module 1102 to call the target proxy network element The meta sends the target association.
  • the processing module 1101 is configured to control the transceiver module 1102 to receive IMS information from the user equipment, the IMS information includes the identification information of the user equipment, the target proxy call network element and the user equipment are located in a non-public network; The processing module 1101 is further configured to determine the second call information according to the target association relationship and the identification information of the user equipment, and the target association relationship includes the association relationship between the identification information of the user equipment and the second call information; The processing module 1101 is further configured to control the transceiver module 1102 to send the IMS information to the target inquiry call network element indicated by the second call information, where the target inquiry call network element is located in the target IMS network.
  • the processing module 1101 controls the transceiver module 1102 to receive the IMS information from the user equipment, it is further configured to control the transceiver module 1102 to receive information from a policy control network element or a session management network element. the target association.
  • the processing module 1101 controls the transceiver module 1102 to receive the IMS information from the user equipment, it is further configured to control the transceiver module 1102 to receive information from a policy control network element or a session management network element.
  • the identification information of the user equipment and the identification information of the target service provider; and the target association relationship is determined according to the corresponding relationship between the service provider and the inquiry call information.
  • the target association relationship further includes identification information of the target service provider.
  • FIG. 12 shows an apparatus 1200 provided in this embodiment of the present application, and the apparatus shown in FIG. 12 may be an implementation of a hardware circuit of the apparatus shown in FIG. 11 .
  • the communication apparatus can be applied to the flow chart shown above to execute the function of the session management network element, or the user equipment, or the policy control network element, or the target agent calling network element in the above method embodiments.
  • FIG. 12 only shows the main components of the communication device.
  • the apparatus 1200 may also include at least one memory 1230 for storing program instructions and/or data.
  • Memory 1230 and processor 1220 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 1220 may cooperate with the memory 1230.
  • Processor 1220 may execute program instructions stored in memory 1230 . At least one of the at least one memory may be included in the processor.
  • the apparatus 1200 shown in FIG. 12 includes at least one processor 1220 and a communication interface 1210 , and the processor 1220 is configured to execute the instructions or programs stored in the memory 1230 .
  • the processor 1220 is configured to perform the operations performed by the processing module 1101 in the above embodiments
  • the communication interface 1210 is configured to perform the operations performed by the transceiver module 1102 in the above embodiments.
  • the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.
  • the transceiver when the communication interface is a transceiver, the transceiver may include an independent receiver and an independent transmitter; it may also be a transceiver integrating a transceiver function, or a communication interface.
  • the apparatus 1200 may also include a communication line 1240 .
  • the communication interface 1210, the processor 1220 and the memory 1230 may be connected to each other through a communication line 1240; the communication line 1240 may be a peripheral component interconnect (PCI for short) bus or an extended industry standard architecture (extended industry standard architecture). , referred to as EISA) bus and so on.
  • the communication line 1240 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 12, but it does not mean that there is only one bus or one type of bus.
  • an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or an instruction, when the program or instruction is processed by the When the device is executed, the chip system enables the function of the session management network element, or the user equipment, or the policy control network element, or the target proxy call network element in the above method embodiments.
  • the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.
  • processors in the chip system, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory can be integrated with the processor, or can be provided separately from the processor.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.
  • the embodiments of the present application provide a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the computer to execute the session management network in the foregoing method embodiment.
  • the embodiments of the present application provide a computer program product, when the computer reads and executes the computer program product, the computer executes the session management network element, or user equipment, or the policy in the above method embodiments Control the function of the network element, or the target agent to call the network element.
  • an embodiment of the present application provides a communication system, where the communication system includes the session management network element and user equipment in the foregoing method embodiments; or the communication system includes the session management network element and user equipment in the foregoing method embodiments. equipment and a policy control network element; or the communication system includes a session management network element, a user equipment, a policy control network element and a target proxy call network element in the above method embodiments.
  • At least one means one or more, and “plurality” means two or more.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one (a) of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, c can be single or multiple.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, etc.) having computer-usable program code embodied therein.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

一种通信方法及装置，其中方法包括：会话管理网元接收来自用户设备的第一信息，第一信息用于指示用户设备请求连接的目标IMS网络，目标IMS网络为多个IMS网络中的一个，目标IMS网络由目标服务提供商提供；会话管理网元根据第一信息，确定第一呼叫信息，第一呼叫信息指示目标代理呼叫网元，第一呼叫信息用于建立用户设备与目标IMS网络的连接；会话管理网元向用户设备发送第一呼叫信息。该技术方案用于实现一个非公共网络连接多个IMS网络，为不同服务提供商的用户设备提供各自的IMS网络服务，且无需在非公共网络中新增本地用户服务器，有助于减少部署的成本。

Description

一种通信方法及装置 技术领域
本申请涉及无线通信技术领域，特别涉及一种通信方法及装置。
背景技术
IP多媒体子系统(IP multimedia subsystem，IMS)网络属于数据网络(data network，DN)的一种，IMS网络与独立组网的非公共网络(standalone non-public network，SNPN)连接，IMS网络为该非公共网络中用户设备(user equipment，UE)提供IMS服务。
IMS网络具有服务提供商属性，比如服务提供商A提供的IMS网络只能为服务提供商A的用户设备(即具有服务提供商A签约数据的用户设备)提供服务，不能为其它服务提供商的用户设备提供服务。由于当前一个非公共网络连接一个IMS网络，所以非公共网络为用户设备提供一种服务提供商提供的IMS网络，也即，只有一种服务提供商的用户设备可以通过非公共网络连接至IMS网络。
目前亟需一种方法，用于实现不同服务提供商的用户设备可以通过非公共网络连接至各自服务提供商的IMS网络。
发明内容
本申请的目的在于提供一种通信方法及装置，用于实现不同服务提供商的用户设备可以通过非公共网络连接至各自服务提供商的IMS网络。
第一方面，本申请的提供一种通信方法，该方法可以由会话管理网元执行，或会话管理网元中的部件(比如芯片或电路)执行。
在一种可能的实现方式中，该方法由会话管理网元执行，该方法包括：会话管理网元接收来自用户设备的第一信息，会话管理网元和用户设备位于非公共网络，非公共网络与多个IMS网络连接，第一信息用于指示用户设备请求连接的目标IMS网络，目标IMS网络为多个IMS网络中的一个，目标IMS网络由目标服务提供商提供；会话管理网元根据第一信息，确定第一呼叫信息，第一呼叫信息指示目标代理呼叫网元，第一呼叫信息用于建立用户设备与目标IMS网络的连接；会话管理网元向用户设备发送第一呼叫信息。
上述技术方案中，实现一个非公共网络连接多个IMS网络，为不同服务提供商的用户设备提供各自的IMS网络服务。进一步的，用户设备向会话管理网元发送第一信息，会话管理网元可以基于第一信息确定用户设备请求连接的目标IMS网络，从而建立用户设备与目标IMS网络之间的会话连接，无需在非公共网络中新增本地用户服务器，有助于减少部署的成本。
在一种可能的实现方式中，第一信息包括目标服务提供商的标识信息，和/或，第一呼叫信息。
上述技术方案中，会话管理网元可以基于第一信息中目标服务提供商的标识信息，确定目标服务提供商提供的目标IMS网络，并建立用户设备与目标IMS网络之间的会话连接。或者，会话管理网元可以基于第一信息中第一呼叫信息，确定第一呼叫信息所指示的目标代理呼叫网元，以及该目标代理呼叫网元所在的目标IMS网络，建立用户设备与目标 IMS网络之间的会话连接。
在一种可能的实现方式中，第一信息为数据网络名称信息，数据网络名称信息中包括目标服务提供商的标识信息。
上述技术方案中，用户设备可以向会话管理网元发送增强的数据网络名称信息，该增强的数据网络名称信息中包括目标服务提供商的标识信息，会话管理网元可以从该数据网络名称信息中获得目标服务提供商的标识信息，并基于现有的会话建立流程，建立用户设备与目标IMS网络之间的会话连接。
在一种可能的实现方式中，目标代理呼叫网元位于非公共网络，方法还包括：会话管理网元向目标代理呼叫网元或策略控制网元发送第二信息；其中，第二信息包括用户设备的标识信息和目标服务提供商的标识信息，第二信息用于指示目标代理呼叫网元将来自用户设备的IMS消息发送至目标IMS网络的目标问询呼叫网元。在一种可能的实现方式中，第二信息还包括用于指示目标问询呼叫网元的第二呼叫信息。
上述技术方案中，会话管理网元向目标代理呼叫网元发送第二信息，或者会话管理网元经策略控制网元向目标代理呼叫网元发送第二消息，目标代理呼叫网元可以基于第二信息，确定用户设备的标识信息和目标问询呼叫网元的对应关系，从而目标代理呼叫网元可以将来自该用户设备的IMS消息发送至对应的目标问询呼叫网元中。
在一种可能的实现方式中，目标代理呼叫网元位于非公共网络，方法还包括：会话管理网元根据服务提供商和问询呼叫信息的对应关系，确定目标服务提供商对应的第二呼叫信息；会话管理网元确定目标关联关系，目标关联关系中包括用户设备的标识信息和第二呼叫信息的关联关系，或目标关联关系中包括用户设备的标识信息、第二呼叫信息和目标服务提供商的标识信息的关联关系；会话管理网元向目标代理呼叫网元或策略控制网元发送目标关联关系。
上述技术方案中，会话管理网元可以根据目标服务提供商和目标服务提供商对应的问询呼叫信息(即第二呼叫信息)，以及用户设备的标识信息，确定用户设备的标识信息和第二呼叫信息的目标关联关系。会话管理网元向目标代理呼叫网元发送目标关联关系，或者经策略控制网元向目标代理呼叫网元发送目标关联关系。目标代理呼叫网元可以根据目标关联关系，将来自该用户设备的IMS消息发送至对应的目标问询呼叫网元中。
第二方面，本申请的提供一种通信方法，该方法可以由用户设备执行，或用户设备中的部件(比如芯片或电路)执行。
在一种可能的实现方式中，该方法由用户设备执行，该方法包括：用户设备向会话管理网元发送第一信息，用户设备和会话管理网元位于非公共网络，非公共网络与多个IMS网络连接，第一信息用于指示用户设备请求连接的目标IMS网络，目标IMS网络为多个IMS网络中的一个，目标IMS网络由目标服务提供商提供；用户设备接收来自会话管理网元的第一呼叫信息，第一呼叫信息指示目标代理呼叫网元，第一呼叫信息用于建立用户设备与目标IMS网络的连接。
在一种可能的实现方式中，第一信息包括目标服务提供商的标识信息，和/或，第一呼叫信息。
在一种可能的实现方式中，第一信息为数据网络名称信息，数据网络名称信息包括所述目标服务提供商的标识信息。
在一种可能的实现方式中，数据网络名称信息是用户设备从接入与移动性管理网元或会话管理网元或接入网网元中获取的。
在一种可能的实现方式中，第一信息包括第一呼叫信息，用户设备向会话管理网元发送第一信息之前，还包括：用户设备接收来自接入网网元的第三信息，第三信息中包括第一服务提供商和第一服务提供商对应的代理呼叫信息，第一服务提供商对应的代理呼叫信息为第一呼叫信息。
上述技术方案中，用户设备可以根据获取的第三信息，确定非公共网络连接的多个IMS网络中是否存在为用户设备提供服务的目标IMS网络。用户设备若确定第三信息中存在用户设备所属的服务提供商的标识信息，则确定多个IMS网络中存在目标IMS网络，用户设备可以通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。用户设备若确定第三信息中不存在用户设备所属的服务提供商的标识信息，则确定多个IMS网络中不存在目标IMS网络，无法通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。
在一种可能的实现方式中，第一信息包括第一呼叫信息，用户设备向会话管理网元发送第一信息之前，还包括：用户设备向域名系统服务器发送查询请求；查询请求包括非公共网络的标识信息；用户设备接收来自域名系统服务器的查询响应，查询响应包括第一呼叫信息，第一呼叫信息指示的目标代理呼叫网元位于目标IMS网络且连接非公共网络。
上述技术方案中，用户设备可以向域名系统服务器发送查询请求，查询请求包括非公共网络的标识信息；若域名系统服务器确定获得目标IMS网络域名对应的代理呼叫信息，则向用户设备反馈包括目标IMS网络域名对应的代理呼叫信息(第一呼叫信息)的查询响应，用户设备可以通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。若域名系统服务器确定未获得目标IMS网络域名对应的代理呼叫信息，则向用户设备反馈查询失败，或指示非公共网络中未连接有目标IMS网络，从而用户设备可以确定无法通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。
第三方面，本申请的提供一种通信方法，该方法可以由策略控制网元执行，或策略控制网元中的部件(比如芯片或电路)执行。
在一种可能的实现方式中，该方法由策略控制网元执行，该方法包括：策略控制网元接收来自会话管理网元的第二信息，第二信息包括用户设备的标识信息和目标服务提供商的标识信息；策略控制网元根据服务提供商和问询呼叫信息的对应关系和第二信息，确定目标关联关系，目标关联关系包括用户设备的标识信息和第二呼叫信息的关联关系，或目标关联关系包括用户设备的标识信息、第二呼叫信息和目标服务提供商的标识信息的关联关系，第二呼叫信息指示目标问询呼叫网元，目标问询呼叫网元位于目标IMS网络中，且目标问询呼叫网元连接非公共网络中目标代理呼叫网元；策略控制网元向目标代理呼叫网元发送目标关联关系。
上述技术方案中，策略控制网元可以根据服务提供商和问询呼叫信息的对应关系和第二信息，确定目标关联关系，向目标代理呼叫网元发送目标关联关系。目标代理呼叫网元可以根据该目标关联关系，将来自该用户设备的IMS消息发送至对应的目标问询呼叫网元中。
第四方面，本申请的提供一种通信方法，该方法可以由目标代理呼叫网元执行，或目标代理呼叫网元中的部件(比如芯片或电路)执行。
在一种可能的实现方式中，该方法由目标代理呼叫网元执行，该方法包括：目标代理呼叫网元接收来自用户设备的IMS信息，IMS信息中包括用户设备的标识信息，目标代理呼叫网元和用户设备位于非公共网络中；目标代理呼叫网元根据目标关联关系和用户设备的标识信息，确定第二呼叫信息，目标关联关系包括用户设备的标识信息和第二呼叫信息的关联关系；目标代理呼叫网元向第二呼叫信息指示的目标问询呼叫网元发送IMS信息，目标问询呼叫网元位于目标IMS网络中。
在一种可能的实现方式中，目标代理呼叫网元接收来自用户设备的IMS信息之前，还包括：目标代理呼叫网元接收来自策略控制网元或会话管理网元的目标关联关系。
在一种可能的实现方式中，目标代理呼叫网元接收来自用户设备的IMS信息之前，还包括：目标代理呼叫网元接收来自策略控制网元或会话管理网元的用户设备的标识信息和目标服务提供商的标识信息；目标代理呼叫网元根据服务提供商和问询呼叫信息的对应关系，确定目标关联关系。
在一种可能的实现方式中，目标关联关系还包括目标服务提供商的标识信息。
上述技术方案中，目标代理呼叫网元可以接收来自策略控制网元或会话管理网元的目标关联关系，或者接收来自策略控制网元或会话管理网元的用户设备的标识信息和目标服务提供商的标识信息，并确定目标关联关系。目标代理呼叫网元可以根据该目标关联关系，将来自该用户设备的IMS消息发送至对应的目标问询呼叫网元中。
第五方面，本申请实施例提供一种通信装置，该装置可以具有实现上述第一方面或第一方面的任一种可能的实现方式中会话管理网元的功能，该装置可以为会话管理网元，也可以为会话管理网元中包括的芯片。
该装置也可以具有实现上述第二方面或第二方面的任一种可能的实现方式中用户设备的功能，该装置可以为用户设备，也可以用户设备中包括的芯片。
该装置也可以具有实现上述第三方面或第三方面的任一种可能的实现方式中策略控制网元的功能，该装置可以为策略控制网元，也可以策略控制网元中包括的芯片。
该装置也可以具有实现上述第四方面或第四方面的任一种可能的实现方式中目标代理呼叫网元的功能，该装置可以为目标代理呼叫网元，也可以目标代理呼叫网元中包括的芯片。
上述通信装置的功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或多个与上述功能相对应的模块或单元或手段(means)。
在一种可能的实现方式中，该装置的结构中包括处理模块和收发模块，其中，处理模块被配置为支持该装置执行上述第一方面或第一方面的任一种可能实现方式中会话管理网元相应的功能，或者执行上述第二方面或第二方面的任一种可能实现方式中用户设备相应的功能，或者执行上述第三方面或第三方面的任一种可能实现方式中策略控制网元相应的功能，或者执行上述第四方面或第四方面的任一种可能实现方式中目标代理呼叫网元相应的功能。收发模块用于支持该装置与其他通信设备之间的通信。该通信装置还可以包括存储模块，存储模块与处理模块耦合，其保存有装置必要的程序指令和数据。
作为一种示例，处理模块可以为处理器，通信模块可以为收发器，存储模块可以为存 储器，存储器可以和处理器集成在一起，也可以和处理器分离设置。
在另一种可能的实现方式中，该装置的结构中包括处理器，还可以包括存储器。处理器与存储器耦合，可用于执行存储器中存储的计算机程序指令，以使装置执行上述第一方面或第一方面的任一种可能实现方式中的方法，执行上述第二方面或第二方面的任一种可能实现方式中的方法，执行上述第三方面或第三方面的任一种可能实现方式中的方法，执行上述第四方面或第四方面的任一种可能实现方式中的方法。
可选地，该装置还包括通信接口，处理器与通信接口耦合。当装置为会话管理网元或用户设备或策略控制网元或目标代理呼叫网元时，该通信接口可以是收发器或输入/输出接口；当该装置为会话管理网元或用户设备或策略控制网元或目标代理呼叫网元中包含的芯片时，该通信接口可以是芯片的输入/输出接口。可选地，收发器可以为收发电路，输入/输出接口可以是输入/输出电路。
第六方面，本申请实施例提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述第一方面或第一方面的任一种可能实现方式中的方法，或实现上述第二方面或第二方面的任一种可能实现方式中的方法，或实现上述第三方面或第三方面的任一种可能实现方式中的方法，或实现上述第四方面或第四方面的任一种可能实现方式中的方法。
可选地，该芯片系统还包括接口电路，该接口电路用于交互代码指令至所述处理器。
可选地，该芯片系统中的处理器可以为一个或多个，该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上。
第七方面，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序或指令，当该计算机程序或指令被执行时，使得计算机执行上述第一方面或第一方面的任一种可能实现方式中的方法，或执行上述第二方面或第二方面的任一种可能实现方式中的方法，或执行上述第三方面或第三方面的任一种可能实现方式中的方法，或执行上述第四方面或第四方面的任一种可能实现方式中的方法。
第八方面，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述第一方面或第一方面的任一种可能实现方式中的方法，或执行上述第二方面或第二方面的任一种可能实现方式中的方法，或执行上述第三方面或第三方面的任一种可能实现方式中的方法，或执行上述第四方面或第四方面的任一种可能实现方式中的方法。
第九方面，本申请实施例提供一种通信系统，该通信系统包括用于执行上述第一方面或第一方面的任一种可能实现方式中会话管理网元，用于执行上述第二方面或第二方面的任一种可能实现方式中用户设备。可选的，所述通信系统还包括用于执行上述第三方面或第三方面的任一种可能实现方式中策略控制网元；
或者，所述通信系统包括用于执行上述第一方面或第一方面的任一种可能实现方式中会话管理网元，用于执行上述第二方面或第二方面的任一种可能实现方式中用户设备，用 于执行上述第三方面或第三方面的任一种可能实现方式中策略控制网元，以及用于执行上述第四方面或第四方面的任一种可能实现方式中目标代理呼叫网元。
附图说明
图1为本申请示例性提供的一种非公共网络的系统架构；
图2a为本申请提供的一种非公共网络与IMS网络之间的连接关系的示意图；
图2b为本申请提供的另一种非公共网络与IMS网络之间的连接关系的示意图；
图3为本申请提供的一种用户设备与IMS网络建立会话的流程示意图；
图4为本申请提供的再一种非公共网络与IMS网络之间的连接关系的示意图；
图5a为本申请提供的一种非公共网络中部署有本地用户服务器的示意图；
图5b为本申请提供的一种非公共网络中部署有本地用户服务器和无服务提供商属性的代理呼叫网元的示意图；
图6为本申请提供的一种通信方法的流程示意图；
图7为本申请示例性提供的第一种会话连接的方法的流程示意图；
图8为本申请示例性提供的第二种会话连接的方法的流程示意图；
图9为本申请示例性提供的第三种会话连接的方法的流程示意图；
图10为本申请示例性提供的第四种会话连接的方法的流程示意图；
图11为本申请提供的一种通信装置的结构示意图；
图12为本申请提供的另一种通信装置的结构示意图。
具体实施方式
为方便描述，如下先对本申请涉及的相关技术和/或术语解释如下。
一、IMS网络中主要涉及如下功能实体：
归属签约用户服务器(home subscriber server，HSS)，在IMS中作为用户信息存储的数据库，主要存放用户认证信息、签约用户的特定信息、签约用户的动态信息、网络策略规则和设备标识寄存器信息，用于移动性管理和用户业务数据管理。它是一个逻辑实体，物理上可以由多个物理数据库组成。
呼叫会话控制功能(call session control function，CSCF)网元，是IMS的核心部分，主要用于基于分组交换的会话发起协议(session initiation protocol，SIP)控制。在IMS中，呼叫会话控制功能网元负责对用户多媒体会话进行处理，可以看作IETF架构中的SIP服务器。根据各自不同的主要功能，呼叫会话控制功能网元分为代理呼叫会话控制功能(proxy-call session control function，P-CSCF)网元、问询呼叫会话控制功能(interrogation-call session control function，I-CSCF)网元和服务呼叫会话控制功能(serving-call session control function，S-CSCF)网元，三个功能在物理上可以分开，也可以独立。本申请中，代理呼叫会话控制功能网元又可以称为代理呼叫网元，问询呼叫会话控制功能网元又可以称为问询呼叫网元，服务呼叫会话控制功能网元又可以称为服务呼叫网元。
多媒体资源功能(multimedia resource function，MRF)网元，主要完成多方呼叫与多媒体会议功能。多媒体资源功能网元由多媒体资源功能控制器(multimedia resource function controller，MRFC)和多媒体资源功能处理器(multimedia resource function processor，MRFP) 构成，分别完成媒体流的控制和承载功能。多媒体资源功能控制器解析从服务呼叫会话控制功能网元收到的会话发起协议信令，并且使用媒体网关控制协议指令来控制多媒体资源功能处理器完成相应的媒体流编解码、转换、混合和播放功能。
网关功能，包括出IMS网关控制功能(breakout gateway control function，BGCF)、媒体网关控制功能(media gateway control function，MGCF)、IMS媒体网关(IMS media gateway，IMS MGW)和信令网关(signaling gateway，SGW)。
二、独立组网的非公共网络(或独立私网或非公共网络)，即该网络不依赖于公共陆地移动网络(public land mobile network，PLMN)，由非公共网络专属运营商运营。非公共网络中的网元设备都服务于该非公共网络中的用户设备，其中的控制面信令、用户面数据通常不会传输至外部网络，达到一定的安全隐私效果。
示例性的，如图1为本申请提供的一种非公共网络的系统架构，包括如下设备或网元：
用户设备，又可以称之为终端设备、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，是一种向用户提供语音和/或数据连通性的设备。例如，所述用户设备可以包括具有无线连接功能的手持式设备、车载设备等。目前，所述用户设备可以是：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self-driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端，或智慧家庭(smart home)中的无线终端等。其中，图1中所述用户设备以UE示出，仅作为示例，并不对用户设备进行限定。
接入网(access network，AN)网元，用于向所述用户设备提供无线接入服务。所述接入网设备是所述通信系统中将所述用户设备接入到无线网络的设备。所述接入网设备为无线接入网中的节点，又可以称为基站，还可以称为无线接入网(radio access network，RAN)节点(或设备)。目前，一些接入网设备的举例为：gNB、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wifi)接入点(access point，AP)等。
应用功能网元，主要功能是与第三代合作伙伴计划(the 3rd generation partnership project，3GPP)核心网交互来提供服务，来影响业务流路由、接入网能力开放、策略控制等。例如，在5G中，所述应用功能网元可以是应用功能(application function，AF)网元，在未来通信，如6G中，所述应用功能网元仍可以是AF网元，或有其它的名称，本申请不做限定。当所述应用功能网元是AF网元时，所述AF网元可以提供Naf服务。
网络开放网元，可用于使3GPP能够安全地向第三方的AF(例如，业务能力服务器(services capability server，SCS)、应用服务器(application server，AS)等)提供网络业务能力等。例如，在5G中，所述网络开放网元可以是网络开放功能(network exposure function，NEF)网元，在未来通信系统中，如6G中，所述网络开放网元仍可以是NEF网 元，或有其它的名称，本申请不做限定。当所述网络开放网元是NEF时，所述NEF可以向其他网络功能网元提供Nnef服务。
统一数据管理网元，可用于管理所述用户设备的签约数据、与所述用户设备相关的注册信息等。例如，在5G中，所述统一数据管理网元可以是统一数据管理(unified data management，UDM)网元，在未来通信系统中，如6G中，所述统一数据管理功能网元仍可以是UDM网元，或有其它的名称，本申请不做限定。当所述统一数据管理功能网元是UDM网元时，所述UDM网元可以提供Nudm服务。
接入与移动性管理网元，可用于对所述用户设备的接入控制和移动性进行管理，在实际应用中，其包括了长期演进(long term evolution，LTE)中网络框架中移动性管理实体(mobility management entity，MME)里的接入与移动性管理功能，并加入了接入管理功能，具体可以负责所述用户设备的注册、移动性管理、跟踪区更新流程、可达性检测、会话管理网元的选择、移动状态转换管理等。例如，在5G中，所述接入与移动性管理网元可以是接入与移动性管理功能(access and mobility management function，AMF)网元，在未来通信，如6G中，所述接入与移动性管理网元仍可以是AMF网元，或有其它的名称，本申请不做限定。当所述接入与移动性管理网元是AMF网元时，所述AMF可以提供Namf服务。
会话管理网元，可用于负责所述用户设备的会话管理(包括会话的建立、修改和释放)，用户面功能网元的选择和重选、所述用户设备的互联网协议(internet protocol，IP)地址分配、服务质量(quality of service，QoS)控制等。例如，在5G中，所述会话管理网元可以是会话管理功能(session management function，SMF)网元，在未来通信系统中，如6G中，所述会话管理网元仍可以是SMF网元，或有其它的名称，本申请不做限定。当会话管理网元时SMF网元时，所述SMF可以提供Nsmf服务。
用户面功能(user plane function，UPF)网元，可以负责用户设备中用户数据的转发和接收。可以从数据网络接收用户数据，通过接入网网元传输给用户设备；用户面功能网元还可以通过接入网网元从用户设备接收用户数据，转发到数据网络。用户面功能网元中为用户设备提供服务的传输资源和调度功能由会话管理功能网元管理控制的。
在实际部署中，非公共网络中的网元可以合设。例如，接入与移动性管理网元可以与会话管理网元合设；会话管理网元可以与用户面网元合设。当两个网元合设的时候，本申请实施例提供的这两个网元之间的交互就成为该合设网元的内部操作或者可以省略。
本申请实施例提供的方案不仅可以适用于非公共网络，还可以适用于中立网络、非3GPP接入网络等其他网络，本申请实施例不作限制。
现有技术中，非公共网络与IMS网络之间的连接关系可参照如图2a，一个非公共网络仅与IMS网络进行连接，一个IMS网络可以连接一个或多个非公共网络。示例性的，非公共网络中用户设备的IP多媒体私有标识(IP multimedia private identity，IMPI)以及IP多媒体公有标识(IP multimedia public identity，IMPU)基于用户设备在非公共网络的用户永久标识(subscription permanent identifier，SUPI)，IMS网络在接收到来自不同非公共网络中用户设备的IMS消息时，IMS网络可以根据该IP多媒体私有标识以及该IP多媒体公有标识确定出用户设备来自于哪个非公共网络。
进一步的，如图2b示例性示出IMS网络与一个非公共网络连接的结构示意图，非公共网络中包括用户设备、接入网网元、接入与移动性管理网元、用户面功能网元、会话管 理网元、策略控制网元、统一数据管理网元，IMS网络中包括归属签约用户服务器、代理呼叫网元、问询/服务呼叫网元。其中一个非公共网络只能连接一个IMS网络。
结合如图2b中架构图，如图3为本申请提供的一种用户设备与IMS网络建立会话的流程示意图。
步骤301，用户设备向接入与移动性管理网元请求建立协议数据单元(protocol data unit，PDU)会话。
示例性的，用户设备向接入与移动性管理网元发送非接入层(non-access stratum，NAS)消息。其中，该NAS消息中携带了会话标识(PDU Session ID)、用户设备请求的数据网络名称(UE Requested data network name，UE Requested DNN)、单个网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)等参数。其中，UE Requested DNN可以是用户设备基于自身所属的服务提供商确定的，比如，用户设备对应服务提供商A，则UE Requested DNN为服务提供商A提供的IMS网络的名称。
步骤302，接入与移动性管理网元选择会话管理网元。
步骤303，接入与移动性管理网元向会话管理网元请求建立PDU会话。
示例性的，接入与移动性管理网元向会话管理网元发送PDU会话创建会话上下文请求消息。该PDU会话创建会话上下文请求消息中携带了SUPI、UE Requested DNN、PDU Session ID等参数。
可选的，步骤304，会话管理网元向统一数据管理网元获取会话管理签约数据。
步骤305，会话管理网元向接入与移动性管理网元发送PDU会话创建会话上下文响应消息。
可选的，步骤306，PDU会话鉴权或授权流程。
步骤307，会话管理网元与策略控制网元建立会话策略关联。具体的，若需要动态策略控制和计费(policy control and charging，PCC)规则，则会话管理网元选择策略控制网元，并与该策略控制网元建立会话策略关联。
步骤308，会话管理网元选择用户面功能网元。步骤308可选。
步骤309，会话管理网元向策略控制网元执行会话策略关联修改，在该步骤中，会话管理网元会向策略控制网元发送为用户设备分配的IP地址。
步骤309在步骤307执行的情况下执行。
步骤310，会话管理网元与用户面功能网元建立N4连接。
步骤311，会话管理网元向接入与移动性管理网元发送N1N2消息(Namf_Communication_N1N2Message transfer)。N1N2消息中携带了用户面功能网元的隧道端点标识等信息，该信息会发给接入网网元，用于告诉接入网网元，上行数据的目的对端。若该PDU会话是用于IMS的，则会话管理网元还会将代理呼叫网元的地址信息携带在此N1N2消息中。
步骤312，接入与移动性管理网元向用户设备发送上述代理呼叫网元的地址信息。
示例性的，接入与移动性管理网元向用户设备发送NAS消息。该NAS消息中携带了上述代理呼叫网元的地址信息。
步骤313，用户设备根据接收到的代理呼叫网元的地址，请求与代理呼叫网元建立连接。
示例性的，用户设备向代理呼叫网元发送SIP信令(亦可称为IMS信令或IMS消息)。 该SIP信令用于请求建立与IMS网络的连接。该SIP信令的目标地址为用户设备接收到的代理呼叫网元的地址。
为实现非公共网络为不同服务提供商的用户设备建立与对应服务提供商提供的IMS网络的会话连接，如图4为本申请示例性提供的另一种系统架构，该系统架构中一个非公共网络可以连接多个IMS网络。
示例性的，如图4中，非公共网络分别连接IMS网络1、IMS网络2和IMS网络3，IMS网络1由服务提供商1提供，IMS网络2由服务提供商2提供，IMS网络3由服务提供商3提供，具体的，服务提供商1、服务提供商2和服务提供商3分别对应标识信息：服务提供商标识1(SP ID1)、服务提供商标识2(SP ID2)和服务提供商标识3(SP ID3)，IMS网络1、IMS网络2和IMS网络3分别对应标识信息：IMS网络标识1(IMS ID1)、IMS网络标识2(IMS ID2)和IMS网络标识3(IMS ID3)，本申请实施例均可以结合图4举例说明。
还需要说明的是，一个IMS网络仍可以继续连接一个或多个非公共网络。
非公共网络中用户设备在请求连接IMS网络时，非公共网络需要确定用户设备请求连接的IMS网络是哪一个(如下将用户设备请求连接的IMS网络称为目标IMS网络)。示例性的，如图4中，若用户设备属于服务提供商1，则该用户设备请求连接IMS网络时，非公共网络确定目标IMS网络为IMS网络1，然后非公共网络建立用户设备与IMS网络1的会话连接。
在一个可选方式中，如图5a所示，可以在非公共网络中部署一个IMS网络的本地用户服务器(IMS HSS)，该本地用户服务器中存储有用户设备在IMS网络中的签约数据。当用户设备发起PDU会话建立请求消息时，非公共网络通过统一数据管理网元以及本地用户服务器，确定该用户设备想要连接的目标IMS网络的服务提供商信息，从而确定目标IMS网络和目标IMS网络中代理呼叫网元，非公共网络建立用户面功能网元与代理呼叫网元之间的连接，从而完成PDU会话建立。
在另一个可选方式中，如图5b所示，可以在非公共网络中部署本地用户服务器和一个无服务提供商属性的代理呼叫网元，其中本地用户服务器存储有用户设备在IMS网络中的签约数据，用户面功能网元通过N6接口与代理呼叫网元连接。当用户设备发起PDU会话建立请求消息时，代理呼叫网元可以通过查询本地用户服务器，获知用户设备的服务提供商信息，从而基于用户设备的服务提供商信息确定目标IMS网络和目标IMS网络中问询呼叫网元。当代理呼叫网元收到来自该用户设备的IMS消息时，可以将该IMS消息发送至该目标IMS网络中的问询呼叫网元。
如图5a和图5b中，均需要在非公共网络中新增功能网元，增加了部署成本。
基于此，本申请提供一种通信方法，从非公共网络连接的多个IMS网络中确定出目标IMS网络，建立用户设备与目标IMS网络的会话连接。
此外，本申请提供的方法有助于节省部署成本，在每个IMS网络中部署有与之对应的代理呼叫网元的情况下，无需在非公共网络中增加本地用户服务器，参照图5a，可以不在非公共网络中部署本地用户服务器情况下，实现从多个IMS网络中确定出目标IMS网络。
又或者，在非公共网络中部署无服务提供商属性的代理呼叫网元的情况下，无需在非公共网络中增加本地用户服务器，参照图5b，可以不在非公共网络中部署本地用户服务器 情况下，实现从多个IMS网络中确定出目标IMS网络。
应理解，本申请提供的通信方法，可以适用于两种架构：
架构一，在每个IMS网络中部署有与之对应的代理呼叫网元，架构一可以参照图5a，且非公共网络中无需部署本地用户服务器。
架构二，在非公共网络中部署无服务提供商属性的代理呼叫网元，架构二可以参照图5b，且非公共网络中无需部署本地用户服务器。
参照如图6示出的流程示意图说明如下。其中，该流程图涉及非公共网络和与该非公共网络连接的多个IMS网络，非公共网络从多个IMS网络中确定目标IMS网络，其中该目标IMS网络是由用户设备的服务提供商(可以称为是目标服务提供商)提供。
进一步的，非公共网络中包括会话管理网元、接入与移动性管理网元、策略控制网元、用户设备、接入网网元等，IMS网络中包括问询呼叫网元。基于上述架构一和架构二，代理呼叫网元可以在非公共网络中，也可以在IMS网络中。
步骤601，用户设备向会话管理网元发送第一信息。
第一信息用于指示所述用户设备请求连接的目标IMS网络。
第一信息可以是用户设备直接发送至会话管理网元的，或是用户设备经接入与移动性管理网元发送至会话管理网元的。
第一信息可以是用户设备在请求建立会话连接时发送的，也可以是用户设备在请求建立会话连接之前发送的。示例性的，用户设备向接入与移动性管理网元发送的PDU会话建立请求消息(NAS消息)，该PDU会话建立请求消息中包括第一信息，接入与移动性管理网元选择会话管理网元，然后向该会话管理网元发送该第一信息。一种可行的实现方式，接入与移动性管理网元向该会话管理网元发送PDU会话创建会话上下文请求消息，该PDU会话创建会话上下文请求消息中包括有该第一信息。
第一信息中可以包括目标服务提供商的标识信息和/或第一呼叫信息。其中，目标服务提供商的标识信息，具体可以是，目标服务提供商标识、目标运营商标识、目标运营商网络标识等任意可以用于表征提供目标IMS网络服务的服务提供商的信息。第一呼叫信息用于指示目标IMS网络中目标代理呼叫网元，具体的，第一呼叫信息可以是目标IMS网络中目标代理呼叫网元的地址信息。
第一种可选实现方式中，用户设备可以将目标服务提供商的标识信息作为第一信息发送至会话管理网元。
示例性的，用户设备可以先获取第一集合，第一集合中包括与非公共网络连接的多个IMS网络中各IMS网络所属的服务提供商的标识信息。用户设备从第一集合中确定出用户设备请求的服务提供商的标识信息(即目标服务提供商的标识信息)，向会话管理网元发送目标服务提供商的标识信息。
结合图4举例，第一集合中包括SP ID1、SP ID2和SP ID3。若用户设备对应服务提供商1，则用户设备从第一集合中确定出SP ID1，并向会话管理网元发送SP ID1。
本可选实现方式中，第一集合可以是用户设备从接入网网元、或接入与移动性管理网元、或会话管理网元中获取。
第一个示例，第一集合可以是接入网网元发送至用户设备的，接入网网元可以是基于用户设备的请求发送的，也可以是广播给用户设备的。该第一集合可以承载于接入网网元向用户设备发送的无线资源控制(radio resource control，RRC)消息、或媒体接入控制层 的控制单元(medium access control control element，MAC CE)、或下行控制信息(downlink control information，DCI)中。
第二个示例，用户设备可以向接入与移动性管理网元发送第一请求信息，该第一请求信息用于向接入与移动性管理网元请求第一集合。接入与移动性管理网元接收该第一请求信息，向用户设备发送包含有该第一集合的第一响应信息。可选的，接入与移动性管理网元可以从会话管理网元获得该第一集合。
可选的，第一请求信息可以是承载于用户设备向接入与移动性管理网元发送的NAS消息中，该第一请求信息可以作为单独的一条NAS消息，也可以是承载于已有的NAS消息中。第一响应信息可以是承载于接入与移动性管理网元向用户设备发送的NAS消息中，该第一响应信息可以作为单独的一条NAS消息，也可以是承载于已有的NAS消息中。
需要指出的是，用户设备获取第一集合的目的在于，确定非公共网络连接的多个IMS网络中是否存在为用户设备提供服务的目标IMS网络，所以，用户设备若确定第一集合中存在用户设备所属的服务提供商的标识信息，则确定多个IMS网络中存在目标IMS网络，用户设备可以通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。若用户设备确定多个IMS网络中不存在目标IMS网络，则可以确定无法通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。
此外，用户设备也可以直接将自己的服务提供商的标识信息作为第一信息，非公共网络来确定多个IMS网络中是否存在目标IMS网络，也即确定是否可以建立用户设备与目标IMS网络之间的会话连接。结合上述例子，用户设备可以向会话管理网元发送SP ID1，其中SP ID1指示的服务提供商1提供的IMS网络1，若非公共网络根据SP ID1确定多个IMS网络中存在IMS网络1，则建立用户设备与IMS网络1之间的会话连接。
第一信息可以是数据网络名称信息。需要说明的是，现有技术中IMS网络对应的数据网络名称信息具体为“IMS”，其中并未包含目标服务提供商的标识信息，而本方案中数据网络名称信息为增强的数据网络名称信息，相比于现有技术中数据网络名称信息，其中包括服务提供商的标识信息。用户设备向会话管理网元发送数据网络名称信息，会话管理网元可以根据数据网络名称信息获得目标服务提供商的标识信息。
可选的，数据网络名称信息可以是用户设备从接入网网元、或接入与移动性管理网元、或会话管理网元中获取。
示例性的，接入网网元广播第二集合，其中第二集合包括与非公共网络连接的多个IMS网络中各IMS网络对应的数据网络名称信息，其中每个IMS网络对应的数据网络名称信息包括IMS网络所属服务提供商的标识信息。用户设备根据自己所属的服务提供商，从第二集合中确定数据网络名称信息。
结合图4举例，IMS网络1、IMS网络2和IMS网络3分别对应的数据网络名称信息为DNN1(包括SP ID1)、DNN2(包括SP ID2)和DNN3(包括SP ID3)，接入网网元广播的第二集合中包括DNN1、DNN2和DNN3。若用户设备对应服务提供商1，则用户设备从第二集合中确定出DNN1，并向会话管理网元发送DNN1。
此外，第二集合中还可以进一步包括与DNN对应的服务提供商，比如，第二集合中包括(SP ID1和DNN1)，(SP ID2和DNN2)，以及(SP ID3和DNN3)，用户设备接收第二集合，根据用户设备对应的服务提供商1，从第二集合中确定出SP ID1对应的DNN1，并向会话管理网元发送DNN1。
再示例性的，用户设备向接入与移动性管理网元发送第二请求信息，第二请求信息用于向接入与移动性管理网元请求目标服务提供商提供的IMS网络的数据网络名称信息，其中第二请求信息中包括有目标服务提供商的标识信息。
进一步的，第二请求信息中还可以包括目标服务提供商的标识信息和第一指示信息，其中第一指示信息用于指示第二请求信息是用于请求该目标服务提供商提供的IMS网络的数据网络名称信息的请求消息。
接入与移动性管理网元根据第二请求信息中目标服务提供商的标识信息，确定接入与移动性管理网元中是否有与目标服务提供商的标识信息对应的数据网络名称信息。若有，则向用户设备发送包括有该数据网络名称信息的第二响应信息，若没有，则从会话管理网元中获取该数据网络名称信息之后，向用户设备发送包含该数据网络名称信息的第二响应信息。
一种具体实现中，接入与移动性管理网元向会话管理网元发送目标服务提供商的标识信息，会话管理网元根据目标服务提供商的标识信息，向接入与移动性管理网元发送数据网络名称信息。可选的，接入与移动性管理网元还可以向会话管理网元发送第二指示信息，其中第二指示信息用于指示会话管理网元向接入与移动性管理网元发送该数据网络名称信息。
结合图4举例，用户设备向接入与移动性管理网元发送的第二请求信息，其中第二请求信息包括SP ID1，接入与移动性管理网元根据第二请求信息中SP ID1，确定接入与移动性管理网元中没有SP ID1对应的DNN1，则从会话管理网元中获取该DNN1，并向用户设备发送DNN1。
第二种可选实现方式，用户设备可以将第一呼叫信息作为第一信息发送至会话管理网元。
架构一中每个IMS网络中部署有与之对应的代理呼叫网元，非公共网络根据第一信息确定目标代理呼叫网元，以及目标代理呼叫网元所属的目标IMS网络。
示例性的，如图4的系统架构中，IMS网络1、IMS网络2和IMS网络3分别对应的代理呼叫信息为代理呼叫信息1、代理呼叫信息2和代理呼叫信息3。用户设备向会话管理网元发送代理呼叫信息1，则会话管理网元根据代理呼叫信息1确定目标IMS网络为IMS网络1，并选择可以与IMS网络1建立连接的用户面功能网元。
示例性的，用户设备确定第一呼叫信息可以有如下方式一和方式二。
方式一，用户设备从接入网网元中获取。
接入网网元可以向用户设备广播第三集合(也可称为第三信息)，其中，第三集合中包括非公共网络连接的多个IMS网络中各IMS网络所属的服务提供商的标识信息和对应的代理呼叫信息，用户设备根据其所属的服务提供商的标识信息，确定对应的代理呼叫信息，该代理呼叫信息即为第一呼叫信息。
结合图4举例，第三集合中包括IMS网络1对应的SP ID1和代理呼叫信息1、IMS网络2对应的SP ID2和代理呼叫信息2、IMS网络3对应的SP ID3和代理呼叫信息3。若用户设备的所属服务提供商对应SP ID1，则用户设备从第三集合中确定出代理呼叫信息1为第一信息。
需要指出的是，用户设备获取第三集合的目的在于，确定非公共网络连接的多个IMS网络中是否存在为用户设备提供服务的目标IMS网络。所以，用户设备若确定第三集合中 存在用户设备所属的服务提供商的标识信息，则确定多个IMS网络中存在目标IMS网络，用户设备可以通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。用户设备若确定多个IMS网络中不存在目标IMS网络，则可以确定无法通过非公共网络建立会话连接以获取该目标IMS网络提供的IMS业务。
方式二，用户设备从域名系统服务器(domain name system server，DNS server)中获取。
用户设备可以向域名系统服务器请求第一呼叫信息。
示例性的，用户设备中预先配置有所属服务提供商提供的IMS网络的域名信息(即目标IMS网络的域名信息)。示例性的，目标IMS网络的域名信息可以是ims.mnc99.mcc999.3gppnetwork.org；其中mnc表示移动网络码(mobile network code)，是一个国家内运营商网络的代码；mcc表示移动国家码(mobile country code)，是一个唯一指定某国家的三位数字代码。该域名信息指示在移动国家码为999的国家内由移动网络码为99的运营商提供的IMS网络。
用户设备向域名系统服务器发送第三请求信息，该第三请求信息中包括有目标IMS网络的域名信息和非公共网络的标识信息，其中非公共网络的标识信息可以是非公共网络的网络标识(比如公共陆地移动网络标识(public land mobile network identity，PLMN ID)+网络标识(network identifier，NID)。域名系统服务器接收到第三请求信息，根据第三请求信息中目标IMS网络的域名信息和非公共网络的标识信息，确定目标IMS网络域名对应的代理呼叫信息(即第一呼叫信息)，该第一呼叫信息指示的代理呼叫网元与该非公共网络连接，域名系统服务器将包含有第一呼叫信息的第三响应信息发送至用户设备。
此外，若域名系统服务器确定未有目标IMS网络域名对应的代理呼叫信息，则向用户设备反馈的第三响应信息用于指示查询失败，或指示非公共网络中未连接目标IMS网络。
域名系统服务器可以是部署于会话管理网元中，或者说，会话管理网元具有域名系统服务器的功能，在该种方式中，用户设备从域名系统服务器中获取第一呼叫信息，相当于是，用户设备从会话管理网元中获取第一呼叫信息。用户设备可以通过控制面消息或者用户面消息从会话管理网元中获取第一呼叫信息。
在第二种可选实现方式中，示例性的，会话管理网元中预先获得第一对应关系，该第一对应关系中包括有与非公共网络连接的多个IMS网络中各IMS网络对应的服务提供商的标识信息和代理呼叫信息(比如代理呼叫网元的地址信息)。用户设备向会话管理网元发送第一呼叫信息，第一呼叫信息可以隐式指示用户设备所属的目标服务提供商，或者说，隐式指示用户设备所属的目标服务提供商的标识信息。
结合图4举例，如表1为一种第一对应关系，该第一对应关系中包含有IMS网络1至IMS网络3分别对应的服务提供商的标识信息和代理呼叫信息。若第一呼叫信息为代理呼叫地址信息1(P-CSCF IP1)，则可以指示用户设备所属的目标服务提供商为服务提供商1，以及所属的目标服务提供商的标识信息为SP ID1。
表1
服务提供商的标识信息 代理呼叫信息
SP ID1 P-CSCF IP1
SP ID2 P-CSCF IP2
SP ID 3 P-CSCF IP3
第三种可选实现方式，用户设备将目标服务提供商的标识信息和第一呼叫信息一起作为第一信息发送至会话管理网元，其中目标服务提供商提供的目标IMS网络对应的代理呼叫信息即为该第一呼叫信息。该具体实现可参照上述第一种可选实现方式和第二种可选实现方式，不再赘述。
步骤602，会话管理网元根据所述第一信息，确定第一呼叫信息。
情况一、第一信息中包括目标服务提供商的标识信息。
架构一中在每个IMS网络中部署有与之对应的代理呼叫网元，会话管理网元根据第一信息中包括的目标服务提供商的标识信息，确定第一呼叫信息，第一呼叫信息指示目标代理呼叫网元(即目标IMS网络中代理呼叫网元)，相当于会话管理网元从与非公共网络连接的多个IMS网络中确定出目标IMS网络。
一种可选实现方式中，会话管理网元中包括第一对应关系，会话管理网元根据目标服务提供商的标识信息，从第一对应关系中确定出与目标服务提供商的标识信息对应的代理呼叫信息，即为第一呼叫信息。结合上述表1举例，若第一信息中包括目标服务提供商的标识信息为SP ID1，则会话管理网元可以确定第一呼叫信息为P-CSCF IP1。
架构二中在非公共网络中部署无服务提供商属性的代理呼叫网元，会话管理网元可以基于服务提供商的标识信息，确定非公共网络中部署的无服务提供商属性的代理呼叫网元的代理呼叫信息(同样可以称为是第一呼叫信息)。
情况二、第一信息中包括第一呼叫信息。
会话管理网元可以从第一信息中确定第一呼叫信息。
当然，第一信息中还可以包括目标服务提供商的标识信息和第一呼叫信息，该具体实现可参照上述情况一和情况二，不再赘述。
步骤603，会话管理网元向用户设备发送第一呼叫信息。
相应的，用户设备接收来自会话管理网元的第一呼叫信息，用户设备可以根据第一呼叫信息，确定IMS消息的目的地址信息。
示例性的，用户设备获得目标代理呼叫网元的地址信息，便可向目标代理呼叫网元发送IMS消息以获取目标IMS网络提供的IMS业务。
上述技术方案实现一个非公共网络连接多个IMS网络，为不同服务提供商的用户设备提供各自的IMS网络服务。进一步的，用户设备向会话管理网元发送第一信息，第一信息可以包括目标服务提供商的标识信息和/或第一呼叫信息，会话管理网元可以基于第一信息确定用户设备请求连接的目标IMS网络，从而建立用户设备与目标IMS网络之间的会话连接，无需在非公共网络中新增本地用户服务器，有助于减少部署的成本。
进一步的，第一信息为数据网络名称信息时，用户设备可以采用现有的会话建立流程，无需额外增加信元或参数，非公共网络即可获知用户设备请求连接的IMS网络，完成会话建立。
此外，需要指出的是，架构二中在非公共网络中部署无服务提供商属性的代理呼叫网元，虽然用户设备根据第一呼叫信息，向非公共网络中无服务提供商属性的目标代理呼叫 网元发送IMS消息，但该目标代理呼叫网元连接有多个服务提供商分别提供的IMS网络，目标代理呼叫网元在向目标IMS网络中的目标问询呼叫网元发送IMS消息之前，确定目标IMS网络中的目标问询呼叫网元。
一种可选实现方式中，目标代理呼叫网元获得目标关联关系，目标关联关系中包含用户设备的标识信息和用户设备对应的问询呼叫信息。其中，用户设备的标识信息可以是用户设备的IP地址或用户设备的标识(Identity，ID)。用户设备对应的问询呼叫信息可以是用户设备所属服务提供商对应的IMS网络中问询呼叫网元的地址信息。
示例性的，表2为目标代理呼叫网元获得的一种目标关联关系。表2中包括用户设备的标识信息和用户设备对应的问询呼叫信息。其中一个或多个用户设备可以对应于同一个问询呼叫信息。
表2
用户设备的标识信息 问询呼叫信息
UE IP 1 I-CSCF IP1
UE IP 2 I-CSCF IP2
UE IP 3 I-CSCF IP3
UE IP 4 I-CSCF IP3
UE IP 5 I-CSCF IP3
此外，目标关联关系中还可以包括用户设备所属服务提供商的标识信息。示例性的，表3为目标代理呼叫网元获得的另一种目标关联关系。表3中包括用户设备的标识信息、用户设备所属服务提供商的标识信息和用户设备对应的问询呼叫信息。其中一个或多个用户设备可以对应于同一个问询呼叫信息，以及一个或多个用户设备可以对应于同一个服务提供商的标识信息。
表3
用户设备的标识信息 服务提供商的标识信息 问询呼叫信息
UE IP 1 SP ID1 I-CSCF IP1
UE IP 2 SP ID2 I-CSCF IP2
UE IP 3 SP ID3 I-CSCF IP3
UE IP 4 SP ID3 I-CSCF IP3
UE IP5 SP ID3 I-CSCF IP3
若目标代理呼叫网元接收到IMS消息，则可以根据IMS消息中的用户设备的标识信息，从目标关联关系中确定用户设备的标识信息对应的问询呼叫信息(即第二呼叫信息)，并向该第二呼叫信息对应的问询呼叫网元发送IMS消息。
比如表2中，若IMS消息中包含有UE IP 1，则目标代理呼叫网元确定出第二呼叫信息为I-CSCF IP1，目标代理呼叫网元向I-CSCF IP1对应的问询呼叫网元发送该IMS消息。
本申请实施例中，目标代理呼叫网元可以从会话管理网元、或策略控制网元获得目标关联关系。或者，该目标关联关系也可以配置在目标代理呼叫网元上。
示例性的，会话管理网元或策略控制网元确定目标关联关系，向目标代理呼叫网元发送该目标关联关系。如下分情况解释说明。
需要说明的是，目标代理呼叫网元、或会话管理网元、或策略控制网元可以获得一个第二对应关系，该第二对应关系中包括与非公共网络连接的多个IMS网络中各IMS网络对应的服务提供商的标识信息和问询呼叫信息，结合如图4，如表4为一种第二对应关系，该第二对应关系中包含有IMS网络1至IMS网络3分别对应的服务提供商的标识信息和问询呼叫信息。
表4
服务提供商的标识信息 问询呼叫信息
SP ID1 I-CSCF IP1
SP ID2 I-CSCF IP2
SP ID 3 I-CSCF IP3
情况1，会话管理网元确定目标关联关系。
示例性的，用户设备向会话管理网元发送第一信息，第一信息中包含目标服务提供商的标识信息，会话管理网元根据目标服务提供商的标识信息和用户设备的标识信息，结合第二对应关系，确定用户设备的标识信息和问询呼叫信息的关联关系，即如表2所示的目标关联关系；或确定用户设备的标识信息、所属服务提供商的标识信息、问询呼叫信息的关联关系，即如表3所示目标关联关系。
会话管理网元向目标代理呼叫网元发送目标关联关系，或者会话管理网元经策略控制网元向目标代理呼叫网元发送目标关联关系。
情况2，策略控制网元确定目标关联关系。
示例性的，用户设备向会话管理网元发送第一信息，第一信息中包含有目标服务提供商的标识信息，会话管理网元向策略控制网元发送包含目标服务提供商的标识信息和用户设备的标识信息的第二信息。策略控制网元接收第二信息，结合第二对应关系，确定用户设备的标识信息和问询呼叫信息的关联关系，即如表2所示的目标关联关系；或确定用户设备的标识信息、所属服务提供商的标识信息、问询呼叫信息的关联关系，即如表3所示的目标关联关系。
策略控制网元向目标代理呼叫网元发送目标关联关系。
情况3，目标代理呼叫网元确定目标关联关系。
示例性的，用户设备向会话管理网元发送第一信息，第一信息中包含有目标服务提供商的标识信息，会话管理网元向目标代理呼叫网元发送包含目标服务提供商的标识信息和用户设备的标识信息的第二信息，或通过策略控制网元向目标代理呼叫网元发送该第二信息。目标代理呼叫网元接收第二信息，结合第二对应关系，确定用户设备的标识信息和问询呼叫信息的关联关系，即如表2所示的目标关联关系；或确定用户设备的标识信息、所属服务提供商的标识信息、问询呼叫信息的关联关系，即如表3所示的目标关联关系。
上述技术方案实现一个非公共网络连接多个IMS网络，为不同服务提供商的用户设备提供各自的IMS网络服务。当无服务提供商属性的代理呼叫网元部署于非公共网络中时，该代理呼叫网元可以基于目标关联关系，确定问询呼叫网元，从而向该问询呼叫网元发送 来自用户设备的IMS消息。
基于相同的发明构思，如图7为本申请示例性提供的第一种建立用户设备与目标IMS网络之间的会话连接的流程示意图，该实施例可以适用于架构一中在每个IMS网络中部署有与之对应的代理呼叫网元的情况。
其中，第一信息中包括目标服务提供商的标识信息，非公共网络根据目标服务提供商的标识信息，确定用于指示目标代理呼叫网元的第一呼叫信息。第一呼叫信息用于建立用户设备与目标IMS网络之间的会话连接。
步骤701，用户设备向接入与移动性管理网元发送会话建立请求消息。示例性的，用户设备向接入与移动性管理网元发送NAS消息，其中包括会话标识、用户设备请求的数据网络名称、切片信息等参数，此外还包括目标服务提供商的标识信息。
可选的，步骤702，接入与移动性管理网元选择会话管理网元。
步骤703，接入与移动性管理网元向会话管理网元发送创建会话上下文请求消息。示例性的，接入与移动性管理网元向会话管理网元发送PDU会话创建会话上下文请求消息。PDU会话创建会话上下文请求消息中携带会话标识、用户设备请求的数据网络名称等参数，此外还包括目标服务提供商的标识信息。
步骤704，会话管理网元向接入与移动性管理网元发送创建会话上下文响应消息。示例性的，会话管理网元向接入与移动性管理网元发送PDU会话创建会话上下文响应消息。
步骤705，会话管理网元选择用户面功能网元。示例性的，会话管理网元根据目标服务提供商的标识信息，从多个用户面功能网元中选择与目标服务提供商提供的IMS网络连接的用户面功能网元。
步骤706，会话管理网元与用户面功能网元建立N4连接。
步骤707，会话管理网元根据第一对应关系和目标服务提供商的标识信息，确定第一呼叫信息。
步骤708，会话管理网元向接入与移动性管理网元发送第一呼叫信息。示例性的，会话管理网元向接入与移动性管理网元发送N1N2消息(Namf_Communication_N1N2Message transfer)，其中，N1N2消息包括第一呼叫信息。
步骤709，接入与移动性管理网元向用户设备发送第一呼叫信息。
示例性的，接入与移动性管理网元向用户设备发送NAS消息。该NAS消息中携带了上述第一呼叫信息。
步骤710，用户设备根据接收到的第一呼叫信息，请求与目标代理呼叫网元建立连接。
示例性的，用户设备根据接收到的第一呼叫信息向目标代理呼叫网元发送SIP信令(亦可称为IMS信令或IMS消息)。该SIP信令用于请求建立与IMS网络的连接。SIP信令的目标地址为第一呼叫信息指示的目标代理呼叫网元的地址。
本申请实施例中未详细描述的步骤，均可参见图3或图6相关实施例中说明。
基于相同的发明构思，如图8本申请提供第二种建立用户设备与目标IMS网络之间的会话连接的流程示意图，该实施例可以适用于架构一中在每个IMS网络中部署有与之对应的代理呼叫网元的情况。
其中，第一信息为数据网络名称信息，其中数据网络名称信息中包括目标服务提供商 的标识信息，非公共网络根据目标服务提供商的标识信息，确定用于指示目标代理呼叫网元的第一呼叫信息，从而建立用户设备与目标IMS网络之间的会话连接。
步骤801，用户设备可以基于如下示例1或示例2中方法获取数据网络名称信息。
示例1，用户设备从接入与移动性管理网元获取数据网络名称信息，可以参照如下步骤801-1至步骤801-5。
步骤801-1，用户设备向接入与移动性管理网元发送第二请求信息，其中包括目标服务提供商的标识信息，示例性的，该第二请求信息可以承载于NAS消息中，该NAS消息具体可以是注册流程中用户设备向接入与移动性管理网元发送的注册请求消息。
步骤801-2a，若接入与移动性管理网元中有与目标服务提供商的标识信息对应的数据网络名称信息，则执行步骤801-5。
步骤801-2b，若接入与移动性管理网元中没有与目标服务提供商的标识信息对应的数据网络名称信息，则执行步骤801-3至步骤801-5。
步骤801-3，接入与移动性管理网元向会话管理网元发送目标服务提供商的标识信息。
步骤801-4，会话管理网元向接入与移动性管理网元发送数据网络名称信息。其中接入与移动性管理网元与会话管理网元之间的信息可以承载于Nsmf消息中。
步骤801-5，接入与移动性管理网元向用户设备发送数据网络名称信息。
示例2，用户设备从接入网网元获取数据网络名称信息，可以参照如下步骤801-6和步骤801-7。
步骤801-6，接入网网元广播第二集合，其中第二集合包括与非公共网络连接的多个IMS网络中各IMS网络对应的数据网络名称信息。
步骤801-7，用户设备从第二集合中确定所属服务提供商对应的数据网络名称信息。
步骤802，用户设备向接入与移动性管理网元发送会话建立请求消息。示例性的，用户设备向接入与移动性管理网元发送NAS消息，其中包括会话标识、数据网络名称信息、切片信息等参数，数据网络名称信息中包括目标服务提供商的标识信息。
可选的，步骤803，接入与移动性管理网元选择会话管理网元。
步骤804，接入与移动性管理网元向会话管理网元发送创建会话上下文请求消息。示例性的，接入与移动性管理网元向会话管理网元发送PDU会话创建会话上下文请求消息，其中携带了会话标识、数据网络名称信息、切片信息等参数，数据网络名称信息中包括目标服务提供商的标识信息。
步骤805，会话管理网元向接入与移动性管理网元发送创建会话上下文响应消息。示例性的，会话管理网元向接入与移动性管理网元发送PDU会话创建会话上下文响应消息。
步骤806，会话管理网元选择用户面功能网元。示例性的，会话管理网元根据数据网络名称信息中目标服务提供商的标识信息，从多个用户面功能网元中选择与目标服务提供商提供的目标IMS网络连接的用户面功能网元。
步骤807，会话管理网元与用户面功能网元建立N4连接。
步骤808，会话管理网元根据第一对应关系和目标服务提供商的标识信息，确定第一呼叫信息。
步骤809，会话管理网元向接入与移动性管理网元发送第一呼叫信息。示例性的，会话管理网元向接入与移动性管理网元发送N1N2消息(Namf_Communication_N1N2Message  transfer)，其中，N1N2消息包括第一呼叫信息。
步骤810，接入与移动性管理网元向用户设备发送第一呼叫信息。
步骤811，用户设备根据接收到的第一呼叫信息，请求与目标代理呼叫网元建立连接。
示例性的，用户设备根据接收到的第一呼叫信息向目标代理呼叫网元发送SIP信令(亦可称为IMS信令或IMS消息)。该SIP信令用于请求建立与IMS网络的连接。SIP信令的目标地址为第一呼叫信息指示的目标代理呼叫网元的地址。
本申请实施例中未详细描述的步骤，均可参见图3或图6相关实施例中说明。
基于相同的发明构思，如图9本申请提供第三种建立用户设备与目标IMS网络之间的会话连接的流程示意图，该实施例可以适用于架构一中在每个IMS网络中部署有与之对应的代理呼叫网元的情况。
其中，第一信息中包括第一呼叫信息，第一呼叫信息用于指示目标代理呼叫网元，非公共网络根据第一呼叫信息，建立用户设备与目标IMS网络之间的会话连接。
步骤901，用户设备可以基于如下示例一或示例二中方法获取第一呼叫信息。
示例一，用户设备从域名系统服务器中获取第一呼叫信息，可以参照如下步骤901-1和步骤901-2。
步骤901-1，用户设备向域名系统服务器发送第三请求信息，其中包括目标IMS网络的域名信息和非公共网络的标识信息。
步骤901-2，域名系统服务器根据目标IMS网络的域名信息和非公共网络的标识信息，确定目标IMS网络域名对应的代理呼叫信息(即第一呼叫信息)，域名系统服务器向用户设备发送第一呼叫信息。
示例二，用户设备从接入网网元中获取第一呼叫信息，可以参照如下步骤901-3和步骤901-4。
步骤901-3，接入网网元广播第三集合，第三集合包括非公共网络连接的多个IMS网络中各IMS网络所属的服务提供商的标识信息和对应的代理呼叫信息。
步骤901-4，用户设备从第三集合中确定第一呼叫信息。
步骤902，用户设备向接入与移动性管理网元发送会话建立请求消息。示例性的，用户设备向接入与移动性管理网元发送NAS消息，其中包括会话标识、用户设备请求的数据网络名称、切片信息等参数，此外还包括第一呼叫信息，第一呼叫信息可以指示目标服务提供商的标识信息。
可选的，步骤903，接入与移动性管理网元选择会话管理网元。
步骤904，接入与移动性管理网元向会话管理网元发送创建会话上下文请求消息。示例性的，接入与移动性管理网元向会话管理网元发送PDU会话创建会话上下文请求消息，其中包括会话标识、用户设备请求的数据网络名称、切片信息等参数，此外还包括第一呼叫信息。
步骤905，会话管理网元向接入与移动性管理网元发送创建会话上下文响应消息。示例性的，会话管理网元向接入与移动性管理网元发送PDU会话创建会话上下文响应消息。
步骤906，会话管理网元选择用户面功能网元。示例性的，会话管理网元根据目标服务提供商的标识信息，从多个用户面功能网元中选择与目标服务提供商提供的IMS网络连接的用户面功能网元。可选的，会话管理网元可以根据第一呼叫信息确定目标服务提供商 的标识信息。
步骤907，会话管理网元与用户面功能网元建立N4连接。
步骤908，会话管理网元向接入与移动性管理网元发送第一呼叫信息。示例性的，会话管理网元向接入与移动性管理网元发送N1N2消息(Namf_Communication_N1N2Message transfer)。其中，N1N2消息包括有第一呼叫信息。
步骤909，接入与移动性管理网元向用户设备发送第一呼叫信息。
步骤910，用户设备根据接收到的第一呼叫信息，请求与目标代理呼叫网元建立连接。
示例性的，用户设备根据接收到的第一呼叫信息向目标代理呼叫网元发送SIP信令(亦可称为IMS信令或IMS消息)。该SIP信令用于请求建立与IMS网络的连接。SIP信令的目标地址为第一呼叫信息指示的目标代理呼叫网元的地址。
本申请实施例中未详细描述的步骤，均可参见图3或图6相关实施例中说明。
基于相同的发明构思，如图10本申请提供第四种建立用户设备与目标IMS网络之间的会话连接的流程示意图，该实施例可以适用于架构二中在非公共网络中部署无服务提供商属性的代理呼叫网元的情况。
其中，第一信息中包括目标服务提供商的标识信息，非公共网络根据目标服务提供商的标识信息，确定第二呼叫信息，从而向目标IMS网络发送来自用户设备的IMS消息。
步骤1001，用户设备向接入与移动性管理网元发送会话建立请求消息。示例性的，用户设备向接入与移动性管理网元发送NAS消息，其中包括会话标识、用户设备请求的数据网络名称等参数，此外还包括目标服务提供商的标识信息。
可选的，步骤1002，接入与移动性管理网元选择会话管理网元。
步骤1003，接入与移动性管理网元向会话管理网元发送创建会话上下文请求消息。示例性的，接入与移动性管理网元向会话管理网元发送PDU会话创建会话上下文请求消息，其中包括会话标识、用户设备请求的数据网络名称、切片信息以目标服务提供商的标识信息。
步骤1004，会话管理网元向接入与移动性管理网元发送创建会话上下文响应消息。示例性的，会话管理网元向接入与移动性管理网元发送PDU会话创建会话上下文响应消息。
步骤1005，会话管理网元与策略控制网元建立会话策略关联。
步骤1006，会话管理网元选择用户面功能网元。示例性的，会话管理网元根据目标服务提供商的标识信息，从多个用户面功能网元中选择与目标服务提供商提供的IMS网络连接的用户面功能网元。
步骤1007，会话管理网元与用户面功能网元建立N4连接。
步骤1008，会话管理网元与策略控制网元执行会话策略关联修改。
在步骤1008中，会话管理网元将用户设备的标识信息和目标服务提供商的标识信息发送至策略控制网元，策略控制网元确定目标关联关系，目标关联关系中包括用户设备的标识信息和第二呼叫信息，或包括用户设备的标识信息、目标服务提供商的标识信息和第二呼叫信息。
步骤1009，策略控制网元向目标代理呼叫网元发送目标关联关系。
步骤1008和1009可以参考图6的说明中情况2的描述。
步骤1010，会话管理网元根据目标服务提供商的标识信息，确定第一呼叫信息。其中 第一呼叫信息用于指示目标代理呼叫网元。
步骤1011，会话管理网元向接入与移动性管理网元发送第一呼叫信息。示例性的，会话管理网元向接入与移动性管理网元发送N1N2消息(Namf_Communication_N1N2Message transfer)。其中，N1N2消息包括有第一呼叫信息。
步骤1012，接入与移动性管理网元向用户设备发送第一呼叫信息。
步骤1013，用户设备根据接收到的第一呼叫信息，请求与目标代理呼叫网元建立连接。
示例性的，用户设备向代理呼叫网元发送SIP信令(亦可称为IMS信令或IMS消息)。该SIP信令用于请求建立用户设备与IMS网络的连接。SIP信令的目标地址为第一呼叫信息指示的目标代理呼叫网元的地址，SIP信令的源地址为用户设备的IP地址。代理呼叫网元根据获取的目标关联关系确定该SIP信令对应的问询呼叫信息，并向该问询呼叫信息对应的问询呼叫网元发送该SIP信令。
需要指出的是，上述步骤1008和1009以策略控制网元确定目标关联关系为例。本申请实施例中也可以由会话管理网元确定目标关联关系，并向策略控制网元发送该目标关联关系，然后策略控制网元向目标代理呼叫网元发送该目标关联关系，具体可以参考图6的说明中情况1的描述。或者，本申请实施例中也可以由目标代理呼叫网元确定目标关联关系。示例性的，会话管理网元可以向策略控制网元发送用户设备的标识信息和目标服务提供商的标识信息，然后策略控制网元向目标代理呼叫网元发送用户设备的标识信息和目标服务提供商的标识信息，目标代理呼叫网元确定目标关联关系，具体可以参考图6的说明中情况3的描述。
此外，需要说明的是，本发明实施例不限制步骤1008和1009与后续步骤1010至步骤1013执行的先后顺序。
本申请实施例中未详细描述的步骤，均可参见图3或图6相关实施例中说明。
本文中描述的各个实施例可以为独立的方案，也可以根据内在逻辑进行组合，这些方案都落入本申请的保护范围中。
上述本申请提供的实施例中，分别从各个设备/网元之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，各个设备/网元可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
基于上述内容和相同构思，图11和图12为本申请的提供的可能的通信装置的结构示意图。这些通信装置可以用于实现上述方法实施例中会话管理网元、或用户设备、或策略控制网元、或目标代理呼叫网元的功能，因此也能实现上述方法实施例所具备的有益效果。
在本申请中，该通信装置可以是如图1所示的会话管理网元、或用户设备、或策略控制网元、或目标代理呼叫网元，还可以是应用于会话管理网元、或用户设备、或策略控制 网元、或目标代理呼叫网元中的部件(如芯片或电路)。
如图11所示，该通信装置1100包括处理模块1101和收发模块1102。
当通信装置1100用于实现上述方法实施例的会话管理网元的功能时：
处理模块1101用于控制收发模块1102接收来自用户设备的第一信息，所述装置和所述用户设备位于非公共网络，所述非公共网络与多个IMS网络连接，所述第一信息用于指示所述用户设备请求连接的目标IMS网络，所述目标IMS网络为所述多个IMS网络中的一个，所述目标IMS网络由目标服务提供商提供；所述处理模块1101还用于根据所述第一信息，确定第一呼叫信息，所述第一呼叫信息指示目标代理呼叫网元，所述第一呼叫信息用于建立所述用户设备与所述目标IMS网络的连接；所述处理模块1101还用于控制所述收发模块1102向所述用户设备发送所述第一呼叫信息。
在一种可能的实现方式中，所述第一信息包括所述目标服务提供商的标识信息，和/或，所述第一呼叫信息。
在一种可能的实现方式中，所述第一信息为数据网络名称信息，所述数据网络名称信息中包括所述目标服务提供商的标识信息。
在一种可能的实现方式中，所述目标代理呼叫网元位于所述非公共网络，所述处理模块1101还用于控制所述收发模块1102向所述目标代理呼叫网元或策略控制网元发送第二信息；其中，所述第二信息包括所述用户设备的标识信息和所述目标服务提供商的标识信息，所述第二信息用于指示所述目标代理呼叫网元将来自所述用户设备的IMS消息发送至所述目标IMS网络的目标问询呼叫网元。
在一种可能的实现方式中，所述第二信息还包括用于指示所述目标问询呼叫网元的第二呼叫信息。
在一种可能的实现方式中，所述目标代理呼叫网元位于所述非公共网络，所述处理模块1101还用于根据服务提供商和问询呼叫信息的对应关系，确定所述目标服务提供商对应的第二呼叫信息；确定目标关联关系，所述目标关联关系中包括所述用户设备的标识信息和所述第二呼叫信息的关联关系，或所述目标关联关系中包括所述用户设备的标识信息、所述第二呼叫信息和所述目标服务提供商的标识信息的关联关系；所述处理模块1101还用于控制所述收发模块1102向所述目标代理呼叫网元或策略控制网元发送所述目标关联关系。
当通信装置1100用于实现上述方法实施例的用户设备的功能时：
处理模块1101用于控制收发模块1102向会话管理网元发送第一信息，所述装置和所述会话管理网元位于非公共网络，所述非公共网络与多个IMS网络连接，所述第一信息用于指示所述装置请求连接的目标IMS网络，所述目标IMS网络为所述多个IMS网络中的一个，所述目标IMS网络由目标服务提供商提供；所述处理模块1101还用于控制所述收发模块1102接收来自所述会话管理网元的第一呼叫信息，所述第一呼叫信息指示目标代理呼叫网元，所述第一呼叫信息用于建立所述装置与所述目标IMS网络的连接。
在一种可能的实现方式中，所述第一信息包括所述目标服务提供商的标识信息，和/或，所述第一呼叫信息。
在一种可能的实现方式中，所述第一信息为数据网络名称信息，所述数据网络名称信息包括所述目标服务提供商的标识信息。
在一种可能的实现方式中，所述数据网络名称信息是所述处理模块1101控制所述收发模块1102从接入与移动性管理网元或所述会话管理网元或接入网网元中获取的。
在一种可能的实现方式中，所述第一信息包括所述第一呼叫信息，所述处理模块1101控制所述收发模块1102向会话管理网元发送第一信息之前，还用于控制所述收发模块1102接收来自接入网网元的第三信息，所述第三信息中包括所述第一服务提供商和所述第一服务提供商对应的代理呼叫信息，所述第一服务提供商对应的代理呼叫信息为所述第一呼叫信息。
在一种可能的实现方式中，所述第一信息包括所述第一呼叫信息，所述处理模块1101控制所述收发模块1102向会话管理网元发送第一信息之前，还用于控制所述收发模块1102向域名系统服务器发送查询请求，以及接收来自所述域名系统服务器的查询响应，所述查询请求包括所述非公共网络的标识信息，所述查询响应包括所述第一呼叫信息，所述目标代理呼叫网元位于所述目标IMS网络且连接所述非公共网络。
当通信装置1100用于实现上述方法实施例的策略控制网元的功能时：
处理模块1101用于控制收发模块1102接收来自会话管理网元的第二信息，所述第二信息包括所述用户设备的标识信息和所述目标服务提供商的标识信息；所述处理模块1101还用于根据服务提供商和问询呼叫信息的对应关系和所述第二信息，确定目标关联关系，所述目标关联关系包括所述用户设备的标识信息和第二呼叫信息的关联关系，或所述目标关联关系包括所述用户设备的标识信息、第二呼叫信息和所述目标服务提供商的标识信息的关联关系，所述第二呼叫信息指示目标问询呼叫网元，所述目标问询呼叫网元位于目标IMS网络中，且所述目标问询呼叫网元连接非公共网络中目标代理呼叫网元；所述处理模块1101还用于控制所述收发模块1102向所述目标代理呼叫网元发送所述目标关联关系。
当通信装置1100用于实现上述方法实施例的目标代理呼叫网元的功能时：
处理模块1101用于控制收发模块1102接收来自用户设备的IMS信息，所述IMS信息中包括所述用户设备的标识信息，所述目标代理呼叫网元和所述用户设备位于非公共网络中；所述处理模块1101还用于根据目标关联关系和所述用户设备的标识信息，确定第二呼叫信息，所述目标关联关系包括所述用户设备的标识信息和所述第二呼叫信息的关联关系；所述处理模块1101还用于控制所述收发模块1102向所述第二呼叫信息指示的目标问询呼叫网元发送所述IMS信息，所述目标问询呼叫网元位于目标IMS网络中。
在一种可能的实现方式中，所述处理模块1101控制所述收发模块1102接收来自用户设备的IMS信息之前，还用于控制所述收发模块1102接收来自策略控制网元或会话管理网元的所述目标关联关系。
在一种可能的实现方式中，所述处理模块1101控制所述收发模块1102接收来自用户设备的IMS信息之前，还用于控制所述收发模块1102接收来自策略控制网元或会话管理网元的所述用户设备的标识信息和所述目标服务提供商的标识信息；以及根据服务提供商和问询呼叫信息的对应关系，确定所述目标关联关系。
在一种可能的实现方式中，所述目标关联关系还包括所述目标服务提供商的标识信息。
如图12所示为本申请实施例提供的装置1200，图12所示的装置可以为图11所示的 装置的一种硬件电路的实现方式。该通信装置可适用于前面所示出的流程图中，执行上述方法实施例中会话管理网元、或用户设备、或策略控制网元、或目标代理呼叫网元的功能。为了便于说明，图12仅示出了该通信装置的主要部件。
装置1200还可以包括至少一个存储器1230，用于存储程序指令和/或数据。存储器1230和处理器1220耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器1220可能和存储器1230协同操作。处理器1220可能执行存储器1230中存储的程序指令。所述至少一个存储器中的至少一个可以包括于处理器中。
图12所示的装置1200包括至少一个处理器1220以及通信接口1210，处理器1220用于执行存储器1230中存储的指令或程序。存储器1230中存储的指令或程序被执行时，该处理器1220用于执行上述实施例中处理模块1101执行的操作，通信接口1210用于执行上述实施例中收发模块1102执行的操作。
在本申请实施例中，通信接口可以是收发器、电路、总线、模块或其它类型的通信接口。在本申请实施例中，通信接口为收发器时，收发器可以包括独立的接收器、独立的发射器；也可以集成收发功能的收发器、或者是通信接口。
装置1200还可以包括通信线路1240。其中，通信接口1210、处理器1220以及存储器1230可以通过通信线路1240相互连接；通信线路1240可以是外设部件互连标准(peripheral component interconnect，简称PCI)总线或扩展工业标准结构(extended industry standard architecture，简称EISA)总线等。所述通信线路1240可以分为地址总线、数据总线、控制总线等。为便于表示，图12中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
基于上述内容和相同构思，本申请实施例提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述方法实施例中会话管理网元、或用户设备、或策略控制网元、或目标代理呼叫网元的功能。
可选地，该芯片系统还包括接口电路，该接口电路用于交互代码指令至所述处理器。
可选地，该芯片系统中的处理器可以为一个或多个，该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上。
基于上述内容和相同构思，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序或指令，当该计算机程序或指令被执行时，使得计算机执行上述方法实施例中会话管理网元、或用户设备、或策略控制网元、或目标代理呼叫网元的功能。
基于上述内容和相同构思，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述方法实施例中会话管理网元、或用户设备、或策略控制网元、或目标代理呼叫网元的功能。
基于上述内容和相同构思，本申请实施例提供一种通信系统，该通信系统包括上述方法实施例中会话管理网元、用户设备；或该通信系统包括上述方法实施例中会话管理网元、 用户设备和策略控制网元；或该通信系统包括上述方法实施例中会话管理网元、用户设备和策略控制网元和目标代理呼叫网元。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (37)

  1. 一种通信方法，其特征在于，包括：
    会话管理网元接收来自用户设备的第一信息，所述会话管理网元和所述用户设备位于非公共网络，所述非公共网络与多个IP多媒体子系统IMS网络连接，所述第一信息用于指示所述用户设备请求连接的目标IMS网络，所述目标IMS网络为所述多个IMS网络中的一个，所述目标IMS网络由目标服务提供商提供；
    所述会话管理网元根据所述第一信息，确定第一呼叫信息，所述第一呼叫信息指示目标代理呼叫网元，所述第一呼叫信息用于建立所述用户设备与所述目标IMS网络的连接；
    所述会话管理网元向所述用户设备发送所述第一呼叫信息。
  2. 如权利要求1所述的方法，其特征在于，所述第一信息包括所述目标服务提供商的标识信息，和/或，所述第一呼叫信息。
  3. 如权利要求1所述的方法，其特征在于，所述第一信息为数据网络名称信息，所述数据网络名称信息包括所述目标服务提供商的标识信息。
  4. 如权利要求1至3任一项所述的方法，其特征在于，所述目标代理呼叫网元位于所述非公共网络，所述方法还包括：
    所述会话管理网元向所述目标代理呼叫网元或策略控制网元发送第二信息；
    其中，所述第二信息包括所述用户设备的标识信息和所述目标服务提供商的标识信息，所述第二信息用于指示所述目标代理呼叫网元将来自所述用户设备的IMS消息发送至所述目标IMS网络的目标问询呼叫网元。
  5. 如权利要求4所述的方法，其特征在于，所述第二信息还包括用于指示所述目标问询呼叫网元的第二呼叫信息。
  6. 如权利要求1至3任一项所述的方法，其特征在于，所述目标代理呼叫网元位于所述非公共网络，所述方法还包括：
    所述会话管理网元根据服务提供商和问询呼叫信息的对应关系，确定所述目标服务提供商对应的第二呼叫信息；
    所述会话管理网元确定目标关联关系，所述目标关联关系中包括所述用户设备的标识信息和所述第二呼叫信息的关联关系，或所述目标关联关系中包括所述用户设备的标识信息、所述第二呼叫信息和所述目标服务提供商的标识信息的关联关系；
    所述会话管理网元向所述目标代理呼叫网元或策略控制网元发送所述目标关联关系。
  7. 一种通信方法，其特征在于，包括：
    用户设备向会话管理网元发送第一信息，所述用户设备和所述会话管理网元位于非公共网络，所述非公共网络与多个IP多媒体子系统IMS网络连接，所述第一信息用于指示所述用户设备请求连接的目标IMS网络，所述目标IMS网络为所述多个IMS网络中的一个，所述目标IMS网络由目标服务提供商提供；
    所述用户设备接收来自所述会话管理网元的第一呼叫信息，所述第一呼叫信息指示目标代理呼叫网元，所述第一呼叫信息用于建立所述用户设备与所述目标IMS网络的连接。
  8. 如权利要求7所述的方法，其特征在于，所述第一信息包括所述目标服务提供商的标识信息，和/或，所述第一呼叫信息。
  9. 如权利要求7所述的方法，其特征在于，所述第一信息为数据网络名称信息，所 述数据网络名称信息包括所述目标服务提供商的标识信息。
  10. 如权利要求9所述的方法，其特征在于，所述数据网络名称信息是所述用户设备从接入与移动性管理网元或所述会话管理网元或接入网网元中获取的。
  11. 如权利要求7至10任一项所述的方法，其特征在于，所述第一信息包括所述第一呼叫信息，所述用户设备向会话管理网元发送第一信息之前，还包括：
    所述用户设备接收来自接入网网元的第三信息，所述第三信息中包括所述第一服务提供商和所述第一服务提供商对应的代理呼叫信息，所述第一服务提供商对应的代理呼叫信息为所述第一呼叫信息。
  12. 如权利要求7至10任一项所述的方法，其特征在于，所述第一信息包括所述第一呼叫信息，所述用户设备向会话管理网元发送第一信息之前，还包括：
    所述用户设备向域名系统服务器发送查询请求，所述查询请求包括所述非公共网络的标识信息；
    所述用户设备接收来自所述域名系统服务器的查询响应，所述查询响应包括所述第一呼叫信息，所述第一呼叫信息指示的所述目标代理呼叫网元位于所述目标IMS网络且连接所述非公共网络。
  13. 一种通信方法，其特征在于，包括：
    策略控制网元接收来自会话管理网元的第二信息，所述第二信息包括所述用户设备的标识信息和所述目标服务提供商的标识信息；
    所述策略控制网元根据服务提供商和问询呼叫信息的对应关系和所述第二信息，确定目标关联关系，所述目标关联关系包括所述用户设备的标识信息和第二呼叫信息的关联关系，或所述目标关联关系包括所述用户设备的标识信息、第二呼叫信息和所述目标服务提供商的标识信息的关联关系，所述第二呼叫信息指示目标问询呼叫网元，所述目标问询呼叫网元位于目标IP多媒体子系统IMS网络中，且所述目标问询呼叫网元连接非公共网络中目标代理呼叫网元；
    所述策略控制网元向所述目标代理呼叫网元发送所述目标关联关系。
  14. 一种通信方法，其特征在于，包括：
    目标代理呼叫网元接收来自用户设备的IP多媒体子系统IMS信息，所述IMS信息中包括所述用户设备的标识信息，所述目标代理呼叫网元和所述用户设备位于非公共网络中；
    所述目标代理呼叫网元根据目标关联关系和所述用户设备的标识信息，确定第二呼叫信息，所述目标关联关系包括所述用户设备的标识信息和所述第二呼叫信息的关联关系；
    所述目标代理呼叫网元向所述第二呼叫信息指示的目标问询呼叫网元发送所述IMS信息，所述目标问询呼叫网元位于目标IMS网络中。
  15. 如权利要求14所述的方法，其特征在于，所述目标代理呼叫网元接收来自用户设备的IMS信息之前，还包括：
    所述目标代理呼叫网元接收来自策略控制网元或会话管理网元的所述目标关联关系。
  16. 如权利要求14所述的方法，其特征在于，所述目标代理呼叫网元接收来自用户设备的IMS信息之前，还包括：
    所述目标代理呼叫网元接收来自策略控制网元或会话管理网元的所述用户设备的标识信息和所述目标服务提供商的标识信息；
    所述目标代理呼叫网元根据服务提供商和问询呼叫信息的对应关系，确定所述目标关 联关系。
  17. 如权利要求14至16任一项所述的方法，其特征在于，所述目标关联关系还包括所述目标服务提供商的标识信息。
  18. 一种通信装置，其特征在于，包括：
    处理模块用于控制收发模块接收来自用户设备的第一信息，所述装置和所述用户设备位于非公共网络，所述非公共网络与多个IP多媒体子系统IMS网络连接，所述第一信息用于指示所述用户设备请求连接的目标IMS网络，所述目标IMS网络为所述多个IMS网络中的一个，所述目标IMS网络由目标服务提供商提供；
    所述处理模块还用于根据所述第一信息，确定第一呼叫信息，所述第一呼叫信息指示目标代理呼叫网元，所述第一呼叫信息用于建立所述用户设备与所述目标IMS网络的连接；
    所述处理模块还用于控制所述收发模块向所述用户设备发送所述第一呼叫信息。
  19. 如权利要求18所述的装置，其特征在于，所述第一信息包括所述目标服务提供商的标识信息，和/或，所述第一呼叫信息。
  20. 如权利要求18所述的装置，其特征在于，所述第一信息为数据网络名称信息，所述数据网络名称信息中包括所述目标服务提供商的标识信息。
  21. 如权利要求18至20任一项所述的装置，其特征在于，所述目标代理呼叫网元位于所述非公共网络，所述处理模块还用于控制所述收发模块向所述目标代理呼叫网元或策略控制网元发送第二信息；其中，所述第二信息包括所述用户设备的标识信息和所述目标服务提供商的标识信息，所述第二信息用于指示所述目标代理呼叫网元将来自所述用户设备的IMS消息发送至所述目标IMS网络的目标问询呼叫网元。
  22. 如权利要求21所述的装置，其特征在于，所述第二信息还包括用于指示所述目标问询呼叫网元的第二呼叫信息。
  23. 如权利要求18至20任一项所述的装置，其特征在于，所述目标代理呼叫网元位于所述非公共网络，所述处理模块还用于根据服务提供商和问询呼叫信息的对应关系，确定所述目标服务提供商对应的第二呼叫信息；确定目标关联关系，所述目标关联关系中包括所述用户设备的标识信息和所述第二呼叫信息的关联关系，或所述目标关联关系中包括所述用户设备的标识信息、所述第二呼叫信息和所述目标服务提供商的标识信息的关联关系；所述处理模块还用于控制所述收发模块向所述目标代理呼叫网元或策略控制网元发送所述目标关联关系。
  24. 一种通信装置，其特征在于，包括：
    处理模块用于控制收发模块向会话管理网元发送第一信息，所述装置和所述会话管理网元位于非公共网络，所述非公共网络与多个IP多媒体子系统IMS网络连接，所述第一信息用于指示所述装置请求连接的目标IMS网络，所述目标IMS网络为所述多个IMS网络中的一个，所述目标IMS网络由目标服务提供商提供；
    所述处理模块还用于控制所述收发模块接收来自所述会话管理网元的第一呼叫信息，所述第一呼叫信息指示目标代理呼叫网元，所述第一呼叫信息用于建立所述装置与所述目标IMS网络的连接。
  25. 如权利要求24所述的装置，其特征在于，所述第一信息包括所述目标服务提供商的标识信息，和/或，所述第一呼叫信息。
  26. 如权利要求24所述的装置，其特征在于，所述第一信息为数据网络名称信息， 所述数据网络名称信息包括所述目标服务提供商的标识信息。
  27. 如权利要求26所述的装置，其特征在于，所述数据网络名称信息是所述处理模块控制所述收发模块从接入与移动性管理网元或所述会话管理网元或接入网网元中获取的。
  28. 如权利要求24至27任一项所述的装置，其特征在于，所述第一信息包括所述第一呼叫信息，所述处理模块控制所述收发模块向会话管理网元发送第一信息之前，还用于控制所述收发模块接收来自接入网网元的第三信息，所述第三信息中包括所述第一服务提供商和所述第一服务提供商对应的代理呼叫信息，所述第一服务提供商对应的代理呼叫信息为所述第一呼叫信息。
  29. 如权利要求24至27任一项所述的装置，其特征在于，所述第一信息包括所述第一呼叫信息，所述处理模块控制所述收发模块向会话管理网元发送第一信息之前，还用于控制所述收发模块向域名系统服务器发送查询请求，所述查询请求包括所述非公共网络的标识信息，以及接收来自所述域名系统服务器的查询响应，所述查询响应包括所述第一呼叫信息，所述目标代理呼叫网元位于所述目标IMS网络且连接所述非公共网络。
  30. 一种通信装置，其特征在于，包括：
    处理模块用于控制收发模块接收来自会话管理网元的第二信息，所述第二信息包括所述用户设备的标识信息和所述目标服务提供商的标识信息；
    所述处理模块还用于根据服务提供商和问询呼叫信息的对应关系和所述第二信息，确定目标关联关系，所述目标关联关系包括所述用户设备的标识信息和第二呼叫信息的关联关系，或所述目标关联关系包括所述用户设备的标识信息、第二呼叫信息和所述目标服务提供商的标识信息的关联关系，所述第二呼叫信息指示目标问询呼叫网元，所述目标问询呼叫网元位于目标IP多媒体子系统IMS网络中，且所述目标问询呼叫网元连接非公共网络中目标代理呼叫网元；
    所述处理模块还用于控制所述收发模块向所述目标代理呼叫网元发送所述目标关联关系。
  31. 一种通信装置，其特征在于，包括：
    处理模块用于控制收发模块接收来自用户设备的IP多媒体子系统IMS信息，所述IMS信息中包括所述用户设备的标识信息，所述目标代理呼叫网元和所述用户设备位于非公共网络中；
    所述处理模块还用于根据目标关联关系和所述用户设备的标识信息，确定第二呼叫信息，所述目标关联关系包括所述用户设备的标识信息和所述第二呼叫信息的关联关系；
    所述处理模块还用于控制所述收发模块向所述第二呼叫信息指示的目标问询呼叫网元发送所述IMS信息，所述目标问询呼叫网元位于目标IMS网络中。
  32. 如权利要求31所述的装置，其特征在于，所述处理模块控制所述收发模块接收来自用户设备的IMS信息之前，还用于控制所述收发模块接收来自策略控制网元或会话管理网元的所述目标关联关系。
  33. 如权利要求31所述的装置，其特征在于，所述处理模块控制所述收发模块接收来自用户设备的IMS信息之前，还用于控制所述收发模块接收来自策略控制网元或会话管理网元的所述用户设备的标识信息和所述目标服务提供商的标识信息；以及根据服务提供商和问询呼叫信息的对应关系，确定所述目标关联关系。
  34. 如权利要求31至33任一项所述的装置，其特征在于，所述目标关联关系还包括所述目标服务提供商的标识信息。
  35. 一种通信装置，其特征在于，包括处理器和通信接口，所述通信接口用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求1至6中任一项所述的方法，或用于实现如权利要求7至12中任一项所述的方法，或用于实现如权利要求13所述的方法，或用于实现如权利要求14至17中任一项所述的方法。
  36. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至6中任一项所述的方法，或用于实现如权利要求7至12中任一项所述的方法，或用于实现如权利要求13所述的方法，或用于实现如权利要求14至17中任一项所述的方法。
  37. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至6中任一项所述的方法，或用于实现如权利要求7至12中任一项所述的方法，或用于实现如权利要求13所述的方法，或用于实现如权利要求14至17中任一项所述的方法。
PCT/CN2020/125916 2020-11-02 2020-11-02 一种通信方法及装置 WO2022088183A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/CN2020/125916 WO2022088183A1 (zh) 2020-11-02 2020-11-02 一种通信方法及装置
PCT/CN2021/111629 WO2022088832A1 (zh) 2020-11-02 2021-08-09 一种通信方法及装置
CN202180072548.5A CN116472743A (zh) 2020-11-02 2021-08-09 一种通信方法及装置
EP21884564.2A EP4228329A4 (en) 2020-11-02 2021-08-09 COMMUNICATION METHOD AND DEVICE
US18/308,981 US20230269661A1 (en) 2020-11-02 2023-04-28 Communication method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/125916 WO2022088183A1 (zh) 2020-11-02 2020-11-02 一种通信方法及装置

Publications (1)

Publication Number Publication Date
WO2022088183A1 true WO2022088183A1 (zh) 2022-05-05

Family

ID=81381712

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/CN2020/125916 WO2022088183A1 (zh) 2020-11-02 2020-11-02 一种通信方法及装置
PCT/CN2021/111629 WO2022088832A1 (zh) 2020-11-02 2021-08-09 一种通信方法及装置

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/111629 WO2022088832A1 (zh) 2020-11-02 2021-08-09 一种通信方法及装置

Country Status (4)

Country Link
US (1) US20230269661A1 (zh)
EP (1) EP4228329A4 (zh)
CN (1) CN116472743A (zh)
WO (2) WO2022088183A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101212386A (zh) * 2006-12-29 2008-07-02 中兴通讯股份有限公司 一种电路交换网络与ip多媒体子系统的互通系统
US20110019639A1 (en) * 2009-05-22 2011-01-27 Jeyhan Karaoguz Enterprise Level Management in a Multi-Femtocell Network
CN105230083A (zh) * 2013-05-21 2016-01-06 三星电子株式会社 选择移动通信网络中的小区的方法和装置
CN111182543A (zh) * 2018-11-12 2020-05-19 华为技术有限公司 切换网络的方法和装置
CN111263424A (zh) * 2018-12-04 2020-06-09 维沃移动通信有限公司 一种接入网络的控制方法及通信设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1953448A (zh) * 2006-10-24 2007-04-25 华为技术有限公司 一种sip请求过程中标识和控制ims通信服务的方法
US9379914B2 (en) * 2007-05-11 2016-06-28 At&T Intellectual Property I, L.P. Method and system for implementing aggregate endpoints on IMS networks
CN111436081B (zh) * 2019-03-06 2023-06-30 维沃移动通信有限公司 数据传送的保障方法及通信设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101212386A (zh) * 2006-12-29 2008-07-02 中兴通讯股份有限公司 一种电路交换网络与ip多媒体子系统的互通系统
US20110019639A1 (en) * 2009-05-22 2011-01-27 Jeyhan Karaoguz Enterprise Level Management in a Multi-Femtocell Network
CN105230083A (zh) * 2013-05-21 2016-01-06 三星电子株式会社 选择移动通信网络中的小区的方法和装置
CN111182543A (zh) * 2018-11-12 2020-05-19 华为技术有限公司 切换网络的方法和装置
CN111263424A (zh) * 2018-12-04 2020-06-09 维沃移动通信有限公司 一种接入网络的控制方法及通信设备

Also Published As

Publication number Publication date
US20230269661A1 (en) 2023-08-24
CN116472743A (zh) 2023-07-21
EP4228329A4 (en) 2024-03-27
EP4228329A1 (en) 2023-08-16
WO2022088832A1 (zh) 2022-05-05

Similar Documents

Publication Publication Date Title
US11917498B2 (en) Communication method and communications apparatus
US11665025B2 (en) Information transmission method and system, and convergence gateway
WO2016112671A1 (zh) 一种集群通信系统、服务器及通信方法
US10638351B2 (en) Service rate adjustment method and apparatus
WO2019144935A1 (zh) 通信方法和通信装置
US9848020B2 (en) User plane control in IMS
US20220338152A1 (en) Support for ims routing with multiple ims pdu sessions over different 5gc slices
WO2022007639A1 (zh) 管理应用的方法和装置
WO2021218595A1 (zh) 一种地址获取方法及装置
JP2023052808A (ja) ３ｇｐｐ・セルラー外のアクセスのための、５ｇネットワークにおけるアクセスノードの選択、及び、合法的な傍受に従う地域的要件の表示傍受を意識したアクセスノードの選択
WO2016180113A1 (zh) WiFi语音业务发起的方法、LTE通信设备、终端及通信系统
US20220322053A1 (en) Group identities in a communication system
EP4070518A1 (en) First network node, second wireless device and methods performed therein
WO2019184717A1 (zh) 一种通信方法、及相关产品
WO2021063134A1 (zh) 一种播放视频媒体的方法及装置
RU2454031C2 (ru) Способ, система и устройство для установления ассоциативно-управляющих связей
CN111031528B (zh) 一种专用网络的连接建立方法和装置
US10165538B1 (en) Use of DCN-ID as basis for service configuration and differentiation
WO2022088183A1 (zh) 一种通信方法及装置
JP7425087B2 (ja) セッション管理ネットワーク要素を選択するための方法および装置
CN117136534A (zh) 第一ims节点、第一核心网络节点、第二ims节点和在其中执行的方法
WO2024032213A1 (zh) 通信方法、装置和系统
WO2023143212A1 (zh) 一种通信方法及装置
US11902393B2 (en) Proxy-call session control function (P-CSCF) to P-CSCF communication
JP7328461B2 (ja) 無線通信システムにおけるシステム間の移動性支援のための方法及びその装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20959343

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20959343

Country of ref document: EP

Kind code of ref document: A1