WO2008131681A1 - Procédé, système et appareil de mise en œuvre d'un service de sous-système multimédia ip dans un réseau visité - Google Patents

Procédé, système et appareil de mise en œuvre d'un service de sous-système multimédia ip dans un réseau visité Download PDF

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Publication number
WO2008131681A1
WO2008131681A1 PCT/CN2008/070794 CN2008070794W WO2008131681A1 WO 2008131681 A1 WO2008131681 A1 WO 2008131681A1 CN 2008070794 W CN2008070794 W CN 2008070794W WO 2008131681 A1 WO2008131681 A1 WO 2008131681A1
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WIPO (PCT)
Prior art keywords
network
service
multimedia subsystem
user terminal
gateway
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PCT/CN2008/070794
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English (en)
Chinese (zh)
Inventor
Weisheng Jin
Pengbo Duan
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008131681A1 publication Critical patent/WO2008131681A1/fr

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    • 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]

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a method, system and apparatus for implementing an IP multimedia subsystem service in a visited network. Background technique
  • LTE Long Term Evolution Project
  • SAE network architecture part
  • radio interface part In the 3GPP evolution network, a network architecture part (SAE) and a radio interface part are included.
  • SAE includes end-to-end system features that relate to core network characteristics and how multiple IP-based access networks access the core network.
  • the larger elliptical dashed box in Figure 1 is the packet core (EPC) of the evolved network.
  • the SAE gateway (GW) has the function of accessing an Inter Access System Anchor, including a serving gateway Serving GW and a data gateway PDN GW.
  • Serving GW assumes the 3GPP inter-network handover anchor point and is also the handover anchor point between the evolved base stations (eNodeBs).
  • the packet data gateway PDN GW is a gateway node that terminates the interface SGi between the SAE network and the PDN, and also has the function of anchoring between the 3GPP network and the non-3GPP network. Physically, the service gateway and the data gateway may be unified.
  • the Mobility Management Entity (MME) manages and stores the PDP context of the User Terminal (UE), assigning a temporary to the UE The identity also authenticates and authorizes the UE.
  • MME Mobility Management Entity
  • the 2G/3G access network accesses the SAE EPC through the SGSN, and the LTE EUTRAN user plane directly accesses the SAE EPC.
  • Non-3GPP access networks are divided into trusted (eg WiMax) and untrusted (eg WLAN), trusted by S2a to access SAE EPC, and non-trusted evolved packet data gateway (ePDG) is accessed by S2b to SAE EPC
  • trusted eg WiMax
  • eg WLAN untrusted
  • ePDG evolved packet data gateway
  • S2b to SAE EPC
  • the entities that are not 3GPP user access control and mobility management are AGW (Access Gateway), ePDG or AAA Server/Proxy (Authentication Authorization Accounting Server/Proxy) or a combination of AGW, ePDG and AAA.
  • mobile communications are not limited to traditional voice communications, but can also combine multiple media services such as audio, video, pictures and text.
  • media services can meet the diverse needs of users through a combination of short messages, web browsing, location information, push services and file sharing.
  • IP Multimedia Subsystem IMS
  • 3GPP and 3GPP2 have launched the IP Multimedia Subsystem (IMS) architecture, which aims to implement a variety of multimedia service applications using a standardized open architecture in mobile networks. Provide users with more choices and richer feelings.
  • IMS IP Multimedia Subsystem
  • the IP Multimedia Subsystem is introduced.
  • the IP Multimedia Subsystem is superimposed on the packet domain network.
  • the Call Session Control Function (CSCF), Media Gateway Control Function (MGCF), Media Resource Function (MRF), Interworking Border Control Function (IBCF) and Home Subscriber Server (HSS) are functional entities.
  • the CSCF can be divided into three logical entities: the service CSCF (S-CSCF), the proxy CSCF (P-CSCF), and the query CSCF (I-CSCF).
  • S-CSCF is a service switching center of the IP multimedia subsystem, performs session control, maintains session state, is responsible for managing user information, and generates charging information.
  • the P-CSCF is an access point for users to access the IP multimedia subsystem, completing the user. Registration, responsible for quality of service (QoS) control and security management; I-CSCF is responsible for interworking between IP multimedia subsystem domains, managing the allocation and selection of S-CSCF, hiding network topology and configuration, generating billing data, etc. .
  • the MGCF controls the gateway to implement interworking between the IP Multimedia Subsystem and other networks. MRF provides media resources.
  • Home Location Register (HSS) stores subscriber subscription data and configuration information Interest and so on.
  • the IP Multimedia Subsystem Network defined by 3GPP can also be applied to the packet network defined in 3GPP2 to provide interworking with multiple types of networks, and achieve independence from the use of terminal types. Therefore, the IP multimedia subsystem is not limited to be applied to 3GPP related networks and applications. Other types of access networks and services and applications of the network can also be implemented by the IP multimedia subsystem architecture.
  • the network that provides services for the user terminal can be divided into a bearer network and a service network.
  • the foregoing 3GPP LTE-SAE network and the 3GPP2 network are both bearer networks, and it is necessary for the user to provide a packet data network (PDN).
  • IP connectivity IP connectivity.
  • the IP multimedia subsystem network belongs to the service network and is built on the bearer network to provide users with basic transparent and bearer network service services.
  • the service network and the network can belong to the same carrier or belong to different operators.
  • 3GPP R8 and later versions emphasize roaming, user data is routed from the visited local gateway into the packet data network (PDN), which is a common way of roaming user data, namely Local Breakout.
  • PDN packet data network
  • the feature is that the data route of the user terminal at the visited place enters the packet data network (PDN) from the visited data gateway (PDN GW) instead of entering the packet data network from the home data gateway.
  • PDN packet data network
  • PDN GW visited data gateway
  • the user data may not enter the packet data network, but only in the visited local network, here we collectively refer to Local Breakout. This mode can effectively reduce the transmission delay and the burden on the carrier backbone network in some application scenarios.
  • Local Breakout the user's mobility anchor is at the visited data gateway, and the IP address used for routing belongs to the address field of the visited data gateway.
  • the user can access the IP multimedia subsystem service of the home PLMN by using the IP multimedia subsystem service in the roaming scenario, that is, accessing the home P-CSCF; or accessing the IP multimedia subsystem service of the visited PLMN, that is, visiting the visited place. P-CSCF.
  • the roaming user terminal can use the IP multimedia subsystem service in multiple ways, for example, using the bearer route to return to the home to provide the IP multimedia subsystem service access point. The manner in which the bearer route is used to route from the visited data gateway but access the home to provide the IP Multimedia Subsystem IP Multimedia Subsystem Service Access Point.
  • the embodiment of the invention provides a method, a system and a device for implementing an IP multimedia service on a visited network, which are used to solve the problem in the prior art that when a user terminal visits a network to perform a service, the visited network decides how to provide a service for the user terminal ( How to obtain the P-CSCF address of the IP Multimedia Subsystem service network (especially when roaming, the service network is the home IP Multimedia Subsystem network) and send it to the user terminal, and when roaming How users choose the network that provides IP Multimedia Subsystem services.
  • the visited network determines, according to the IP multimedia subsystem user subscription information of the user terminal, and/or the operator policy, that the user terminal is provided with the IP multimedia subsystem service.
  • Service Network
  • the user terminal uses the P-CSCF address information to perform registration and service access of the IP multimedia subsystem service.
  • a communication system includes a first network and a second network, where the first network includes a service network decision unit and an information acquisition and transmission unit, where
  • the service network decision unit is configured to: before the user terminal belonging to the second network performs IP multimedia subsystem registration with the first network, according to the IP multimedia subsystem of the user terminal Determining, by any one of the user subscription information, the IP multimedia subsystem service indication, and the operator policy, or a combination thereof, a manner in which the user terminal registers a network to which the P-CSCF of the IP multimedia subsystem service belongs and the user data bearer route;
  • the information acquisition and sending unit is configured to obtain P-CSCF address information of the service network, and provide any one of the P-CSCF address information and a routing manner for the user to establish a bearer to the user terminal for IP Multimedia subsystem registration.
  • an information acquisition sending unit configured to acquire P-CSCF address information of the user terminal from the service network, and send the P-CSCF address information to the user terminal.
  • a receiving unit configured to receive, by the network, a request for acquiring a P-CSCF address information of the user terminal, where the information acquiring and sending unit is configured to acquire P-CSCF address information of the user terminal in the home network, and send the P-CSCF address information to the P- CSCF address information is provided to the visited network.
  • a receiving unit configured to receive a bearer setup request sent by the roaming user terminal, where the IP multimedia subsystem service indication of the user terminal is included;
  • a determining unit configured to determine, according to the IP multimedia subsystem service indication of the user terminal, the IP multimedia subsystem user subscription information, the operator policy, or a combination of the user terminal, the user data routing network of the user terminal ;
  • a terminal configured to send the bearer setup request to the local network gateway when the determined user data routing network is routed to the visited local gateway, otherwise, the bearer is established to the home terminal home network gateway, and the two data routes may be simultaneously exist.
  • a terminal provided by the embodiment of the present invention includes:
  • a sending module configured to send, by the visited network gateway, the IP multimedia subsystem service request information, where the request information carries the IP multimedia subsystem service indication information of the terminal;
  • the receiving module is configured to receive network information of the P-CSCF address information of the service network that provides the IP multimedia subsystem service for the terminal, and indication information of the routing manner of the bearer established for the user.
  • the visited network may make a decision according to the user IP multimedia subsystem subscription information of the user terminal roaming locally, the IP multimedia subsystem service indication sent by the user terminal, and the operator policy, and determine the IP address of the user terminal.
  • the service network of the multimedia subsystem service determines which network P-CSCF is used to access the IP Multimedia Subsystem and obtains the P-CSCF address information of the service network.
  • BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a network structure of a SAE;
  • Embodiment 1 of a method according to the present invention
  • Embodiment 3 is a schematic flowchart of Embodiment 2 of a method according to the present invention.
  • Embodiment 4 is a schematic flow chart of Embodiment 3 of a method according to the present invention.
  • FIG. 5 is a schematic structural view of Embodiment 1 of the system of the present invention.
  • FIG. 6 is a schematic structural diagram of an embodiment of a communication system gateway according to the present invention.
  • FIG. 7 is a schematic structural diagram of another embodiment of a communication system gateway according to the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a mobility management entity according to the present invention. detailed description
  • the user terminal when the user terminal attaches to the visited network or switches to the visited network and performs IP multimedia subsystem registration, the visited network according to the IP multimedia subsystem user subscription information of the user terminal, and the IP multimedia sent by the user terminal.
  • Sub-system service indication if the user terminal provides, the operator policy determines, determines a service network of the IP multimedia subsystem service of the user terminal, obtains P-CSCF address information of the service network, and obtains the P-CSCF Address information, replacement page (Article 26)
  • the information of the service network (that is, whether the P-CSCF is owned by the visited or the home network) is sent to the user terminal; the user terminal uses the P-CSCF address information and service
  • the network information is used for IP multimedia subsystem registration and access to the IP Multimedia Subsystem service.
  • the above-mentioned decision step and the execution entity obtaining the P-CSCF address information of the service network providing the IP multimedia subsystem service may be a visited network gateway or a network control entity such as MME/SGSN/AGW/ePDG/AAA Proxy/A AA Server.
  • the visited network gateway or the MME/SGSN may Determining, according to the IP multimedia subsystem service indication, the IP multimedia subsystem user subscription information, the operator policy, or the operator policy of the user terminal, a service network that provides the IP multimedia subsystem service to the user terminal (ie, The visited place is also the destination data route, whether the P-CSCF is visited or owned by the home network).
  • the subscription information may include an indication of whether the user uses the IP multimedia subsystem service provided by the PLMN or the IP multimedia subsystem service provided by the PLMN, that is, the information may also directly determine the service network providing the IP multimedia subsystem service.
  • the first bearer established to access a data gateway is generally the default bearer.
  • the first bearer established to establish a service access to a packet data network is also It may be the default bearer. If the user terminal accesses only one bearer from a certain data gateway, then the bearer is also the default bearer.
  • the default bearer is used to maintain the signaling path between the user terminal and the bearer network or packet data network PDN. And the user data is routed from the visited data gateway to the bearer.
  • the routes of the two types of bearers of the user terminal in the visited place are different.
  • the IP-CAN IP-Connectivity Access Network
  • IP-Connectivity Access Network is for the service network entity and the user terminal.
  • the process of implementing the IP multimedia subsystem service in the visited network by the user terminal in the method embodiment of the present invention is as follows:
  • Step 200 The user terminal sends the IP multimedia subsystem service indication to the visited network gateway in the process of the visited network performing the attach/load establishment request.
  • the IP multimedia subsystem service indication may include an emergency service identifier, or indication information including whether to use the home to provide IP multimedia subsystem services, according to a data routing manner that may be used on behalf of the user terminal, or on behalf of the user terminal.
  • the network to which the P-CSCF of the IP Multimedia Subsystem service is used if the network providing the IP Multimedia Subsystem service access, the network having the P-CSCF for access must be on the same network as the data gateway providing the data route, It may be a representative of a data gateway indicating data routing and a common network providing IP Multimedia Subsystem services.
  • the delivery of the indication message may be independent or carried in other messages.
  • Step 201 When the user terminal attaches to the visited network or switches to the visited network and registers the IP multimedia subsystem service, the visited network gateway according to the IP multimedia subsystem service indication, the IP multimedia subsystem user subscription information of the user terminal Any one or combination of the operator policies determines a service network and a user data routing manner for providing the IP multimedia subsystem service to the user terminal, that is, returning to a local route or performing data routing from the visited data gateway.
  • the IP multimedia subsystem service indication of the user using the IP multimedia subsystem service network may be sent to the network control unit, such as the mobility management entity, the AAA server when the terminal attaches or sends a new bearer or IP-CAN session establishment request.
  • the agent, the access gateway, and the like may be implemented by extending a network (in the service network accessed from the home station or the service network accessed from the visited place) on the APN that initiates the bearer setup request. It can also be carried in messages exchanged between other terminals and the network control unit, for example, non-access stratum signaling (NAS Non-Access Stratum; cartridge: NAS) signaling, dynamic host configuration protocol (Dynamic Host Configuration Protocol; : DHCP) Requests, etc.
  • NAS Non-Access Stratum cartridge: NAS
  • Dynamic Host Configuration Protocol Dynamic Host Configuration Protocol
  • DHCP Dynamic Host Configuration Protocol
  • the indication represents The information may be a routing manner indicating the default bearer that the network user wants to establish (returning the local route or the local gateway to the local gateway), and may also represent the IP multimedia subsystem service network that the user terminal wants to use (attributed by the attribution) It is also provided by the visitor). If the indication information is used only to establish a default bearer or an IP-CAN session, and is used as a route indicating the preference of the user, an independent message may be sent to the network control entity in the future interaction between the terminal and the network. This message is used to indicate which PLMN's P-CSCF address the terminal needs to acquire. At this time, the user IP multimedia subsystem service indication may be the same message or a different message. It should be noted that the scope of use of this indication is not limited to the use of IP multimedia subsystem services, other services can use a similar approach.
  • the user uses the IP multimedia subsystem service indication of the service network, the operator policy, and when the roaming can have the IP multimedia subsystem service of the home network and the IP multimedia subsystem service of the visited location simultaneously provide services for the user, the network
  • the user can be informed of which bearer connections are to the home data gateway, and which bearer connections are to the visited gateway, so that the user selects the data route when roaming, that is, the data is returned from the inter-operator interface to the locality, and from the attribution
  • the gateway enters the packet data network, or enters the packet data network from the visited local data gateway.
  • the visited network obtains the P-CSCF address of the service network and sends it to the user terminal, an indication may also be added to inform the user terminal which P-CSCFs. It is provided by the local business network and which is provided by the visiting business network.
  • the foregoing network notifying the user terminal that the indication of entering the packet data network may be brought to the user terminal in the reply of the default bearer initiated by the user terminal or the IP-CAN session establishment request, or may be the default bearer initiated by the network or
  • the IP-CAN session establishment request is brought to the user terminal to indicate whether the default bearer or IP-CAN session is established to the home gateway access service network or to the visited gateway access service network.
  • this indication can also be brought to the user terminal in other messages, either as an independent indication or as an implicit indication.
  • the implicit indication may be used in the following manner, for example, when the user initiates a default bearer setup request to access the service network using the visited gateway, the IP multimedia subsystem industry that carries the user to use the service network
  • the service indicates (the extended APN), the network decides that the default bearer can be established, and the default 7 load is established without modification, and the UI is sent back to the user terminal, and the user terminal knows this default.
  • the 7-layer establishment to the visited network gateway can be distinguished from the default 7-load to the home gateway.
  • the routing mode of the default bearer may also be indicated in the ⁇ of the user's default bearer setup request reply. This may be extended and the indication is added.
  • the field of the routing method can also be indicated by the operator ID (Operator ID).
  • the APN may be an APN brought in when the user terminal initiates a default bearer setup, or may be an APN that the network reselects for the user, an APN that the user subscribes to, and an indication.
  • the service network for providing the IP multimedia subsystem service to the user terminal may be the visited network of the user terminal or the home network of the user terminal. That is to say, the user terminal may be provided with the IP multimedia subsystem service by the visited network of the user terminal, or the user terminal may be provided with the IP multimedia subsystem service by the user terminal's home network.
  • the operator policy may include an operator policy at the home and/or roaming location. The operator policy may include information on how to determine the service network of the user terminal pre-configured by the operator, and may also include information such as whether the visited network supports the IP multimedia subsystem service, for example, if the visited network does not support the IP multimedia subsystem service, The IP multimedia subsystem service required by the user is provided by the home network.
  • the network may decide to select two routing modes for the user and establish corresponding default bearers.
  • the default 7 loads of these two routing methods can be established together or twice.
  • the default load can be initiated by the user terminal or by a network entity (network control entity, data gateway, core control entity, etc.).
  • Step 202 The visited network gateway establishes a default bearer of the selected routing mode for the user, obtains P-CSCF address information of the service network that provides the IP multimedia subsystem service, and obtains the P-CSCF address information and P - indication of the network to which the CSCF belongs, indication of the manner in which the user data is routed
  • the user terminal may be carried in the user terminal attach response or the default bearer setup response, or may be sent independently.
  • the visited network gateway may obtain P-CSCF address information of the service network from the home network in multiple manners.
  • P-CSCF address information can be configured in advance for the user terminal in the HSS/Authentication, Authorization, and Accounting (AAA) server of the home network, and the visited network gateway can obtain the configuration for the user terminal from the HSS/AAA server of the home network.
  • P-CSCF address information is pre-configured in the HSS/AAA server; the roaming user terminal sends the user identifier of the user terminal to the SGSN/MME/AGW/ePDG network of the visited network in the request of the network control entity interaction.
  • the network control entity obtains P-CSCF address information from the HSS/AAA server of the home network of the user terminal, and provides the P-CSCF address information to the roaming terminal.
  • the visited gateway can also obtain the P-CSCF address information of the user's home network directly from the HSS/AAA server.
  • the P-CSCF address information may be obtained from the home network gateway of the user terminal by the visited network gateway (the visited service gateway or the visited data gateway). Specifically, the visited network gateway sends a request for acquiring the P-CSCF address information of the home network of the user terminal to the home network gateway of the user terminal; the home network gateway acquires the P-CSCF of the home network of the user terminal. Address information, and the home P-CSCF address information is sent to the visited network gateway.
  • the visited network gateway may obtain a request for the user terminal to belong to the P-CSCF address information by roaming between the PLMN gateway and the home PLMN gateway.
  • the visited network gateway may send the request for acquiring the P-CSCF address information of the user terminal home network in multiple manners.
  • the GPRS method is adopted, that is, a P-CSCF address information is transmitted between the home domain gateway and the visited network gateway by newly defining a message, or an interface message between the original home domain gateway and the visited network gateway is extended, and these messages are passed.
  • the request and response of the P-CSCF address information that needs to acquire the home network of the user terminal are carried.
  • the home network gateway receives the cancellation After the information is identified, the P-CSCF address information of the user terminal in the home network is obtained, and the P-CSCF address information of the home network of the user terminal is obtained from the home network, and the method for obtaining the home network P-CSCF address by the home network gateway It can be the internal configuration information of the home network gateway, and the specific implementation refers to the existing standards.
  • the visited network gateway may further send the request for acquiring the home P-CSCF address information of the user terminal by using a dynamic host configuration protocol (DHCP) manner, that is, constructing a DHCP request message on the roaming gateway, and sending the DHCP request message to the home network gateway through the DHCP request.
  • DHCP dynamic host configuration protocol
  • DHCP dynamic host configuration protocol
  • the home network gateway After the home network gateway receives the DHCP request message for obtaining the home P-CSCF address information of the user terminal, and considers that the request is a request for acquiring the P-CSCF address information of the user terminal, the home network directly obtains the user by using the existing technology.
  • the terminal belongs to the P-CSCF address information, and returns the P-CSCF address information of the home terminal home network to the visited network gateway.
  • Step 203 The user terminal uses the P-CSCF address information to register the IP multimedia subsystem and access the IP multimedia subsystem service.
  • the user terminal When the user terminal initiates the IP multimedia subsystem service, it may connect according to different default bearers or IP-CAN sessions (the connection is established to the home gateway or the gateway to the visited destination), the network to which the P-CSCF belongs (the visited service network or Home business network) Register and conduct business. Of course, these policies can be pre-configured on the user terminal.
  • the user terminal uses the P-CSCF address information returned by the network, the network to register the IP multimedia subsystem for the user-set default load or IP-CAN session, and access the IP multimedia subsystem service.
  • the network returns an indication of the default bearer routing mode established for the user (the home data gateway route or the visited data gateway route Local Breakout)
  • the P-CSCF belongs to the network, and the network and the terminal support different routing methods.
  • the P-CSCF to which the different networks belong to access the IP multimedia subsystem service.
  • the user terminal can select a data routing mode and a P-CSCF for accessing the IP multimedia subsystem service according to the indication information.
  • the network completely determines the routing mode used by the user and the IP multimedia subsystem service network provided for the user.
  • the network establishes all possible routing modes for the user, and provides the corresponding IP Multimedia Subsystem Service Access Point (P-CSCF). Address, the way the user chooses to conduct business according to their needs.
  • P-CSCF IP Multimedia Subsystem Service Access Point
  • the terminal In the first mode, the terminal only needs to initiate IP multimedia system service registration and perform services according to the received P-CSCF address.
  • the network control unit can select the appropriate data routing mode (return to the local route or local access to the packet data network) according to the user's preference (the terminal can be sent to the network or not), the user signing and the operator signing, and the operator policy. Routing), establishes a default bearer, and obtains a service access point (P-CSCF) address, which is sent to the user terminal.
  • P-CSCF service access point
  • the P-CSCF address received by the terminal, the network information of the P-CSCF, the default bearer routing mode, and the manner in which the IP multimedia subsystem service is selected initiates the IP multimedia subsystem service registration and performs the service.
  • the network control unit can select the appropriate data routing mode (return to the local route or local access to the packet data network) according to the user's preference (the terminal can be sent to the network or not), the user signing and the operator signing, and the operator policy.
  • P-CSCF service access point
  • the P-CSCF address information may include more than one P-CSCF address domain name and a domain name server (DNS) address, or may only include a P-CSCF address list.
  • DNS domain name server
  • the user terminal may select a P-CSCF address from the P-CSCF address list for IP multimedia subsystem registration and access to the IP Multimedia Subsystem service.
  • the user terminal needs to select a P-CSCF to utilize the DNS server address.
  • the embodiment shown in FIG. 3 is a method for acquiring P-CSCF address information in a 3GPP core network.
  • the visited PLMN gateway determines that the serving network of the user terminal is the home PLMN, the GPRS signaling message or other signaling is required.
  • the message sends a request for obtaining the P-CSCF address information of the home PLMN to the home PLMN gateway.
  • the embodiment shown in FIG. 4 is a method for obtaining the P-CSCF address information in a DHCP manner.
  • the visited PLMN gateway determines the user terminal If the service network is a home PLMN, the DHCP function needs to be constructed on the visited PLMN gateway, and the request to obtain the home P-CSCF address information of the user terminal is sent to the home PLMN network gateway through the DHCP function, or the DHCP mode is directly obtained from the UE. The request of the UE to the P-CSCF address information is sent to the home PLMN gateway.
  • Step 301 The UE sends a default bearer IP-CAN session establishment carrying the IP multimedia subsystem service indication of the UE to the SGSN/MME/AGW/ePDG in the visited PLMN during the attach or default bearer setup process in the visited PLMN. request.
  • the IP multimedia subsystem service indication of the UE may be an emergency call (EMC) identifier, or may be an indication information indicating whether the UE uses the IP multimedia subsystem service provided by the home PLMN.
  • EMC emergency call
  • This indication may have different meanings and forms depending on the portion of the invention. It may represent only the data routing mode that the UE wants to use, or only the network to which the IP multimedia subsystem service that the UE wishes to use, if the network providing the IP multimedia subsystem service access must be on the same network as the data gateway providing the data routing. It may also be a common network representing the data gateways used for data routing and providing IP Multimedia Subsystem services.
  • the indication message may be independent or carried in other messages, for example, an extended APN message.
  • the extended APN message may include a field representing the preference of the user terminal in the APN network ID (NI) or the carrier ID ( 01 ), which may be a direct indication of the network, or may refer to Indicates whether the user wants to return to the local route or the local break (Local Breakout), or the IP multimedia subsystem service that wants to access the home or the visited place.
  • NI APN network ID
  • 01 carrier ID
  • the default/default bearer setup request determine whether the IP multimedia subsystem service indication of the UE is included, and according to whether the IP multimedia subsystem service indication is included, and the specific IP multimedia subsystem service indication information, the user's subscription information, the network
  • the policy integrated routing uses the visited PLMN gateway or the home PLMN gateway and sends a default bearer setup request to the selected gateway.
  • the PLMN gateway may be a GGSN or a packet data gateway PDN GW. (Visiting)
  • the local service gateway Serving GW may participate in the bearer establishment process and carry corresponding messages.
  • the GGSN/PDN GW is selected according to the selection procedure of the GGSN/PDN GW in the existing standard, so that the bearer is created by using the selected GGSN/PDN GW;
  • the emergency call service establishment process in the prior art is performed for subsequent processing.
  • the SGSN/MME/AGW/ePDG/AAA Server/AAA Proxy identifies the IP multimedia subsystem service indication, it selects the APN/GGSN that is specifically set for the emergency service of the PLMN;
  • the bearer setup request carries the IP multimedia subsystem service indication of the UE, and the IP multimedia subsystem service indication is indication information indicating that the UE uses the local IP multimedia subsystem service
  • the user and the operator may be contracted according to the operator policy. Prefer to visit the PLMN gateway;
  • the carrier may be The policy preferentially chooses the home PLMN gateway.
  • the bearer setup request carries the IP multimedia subsystem service indication of the UE, and the IP multimedia subsystem service indication is to indicate that the UE wishes to use the visited PLMN IP multimedia subsystem service
  • the indication information, and the network has established a bearer or IP-CAN session for the user to access the home PLMN data gateway, and according to the operator policy, the user and the operator can sign two routes simultaneously for the user (back to the home data gateway) Or local Local Breakout), then off;
  • the bearer setup request carries the IP multimedia subsystem service indication of the UE, and the IP multimedia subsystem service indication is indication information indicating that the UE wishes to use the home PLMN IP multimedia subsystem service, and the network has established an access visit for the user.
  • the bearer or IP-CAN session of the PLMN data gateway can be based on the operator policy, and the user and the operator can sign two routes at the same time (back to the home data gateway or local Local Breakout), then the gateway;
  • the SGSN/MME//AAA Server/AAA Proxy can store the address of the selected data gateway into the public core control entity HSS (or only the AAA Server) and can also record the network to which the data gateway belongs to the HSS, or just record Whether the data gateway is the gateway of Local Breakout.
  • step 303 is performed. If the visited data gateway is selected in step 302, step 305 is performed.
  • Step 303 If the home PLMN gateway is selected in step 302, the SGSN/MME/AGW/ePDG sends a bearer setup request to the selected home data gateway, where the request may carry an indication requesting the P-CSCF address.
  • the bearer setup request may be sent to the visited service gateway first, and then sent by the visited service gateway to the home data gateway.
  • Step 304 The home PLMN gateway performs the bearer creation process according to the existing process, and obtains the P-CSCF address list of the home PLMN according to the internally configured method. If the data gateway deposits its own address into the public core control entity HSS at this step, the network to which the data gateway belongs may be stored at the same time, or the gateway indicating that it is not in the form of Local Breakout access. Proceed to step 308. Step 305: If the visited PLMN gateway is selected in step 302, the SGSN/MME/AGW/ePDG sends a bearer setup request to the selected visited data gateway, and the request may carry an indication of requesting the P-CSCF address. Depending on the network and the scenario, the bearer setup request may be sent to the visited service gateway first, and then sent by the visited service gateway to the visited data gateway.
  • Step 306 Visiting the PLMN gateway performs the bearer creation process according to the existing process, and obtains the P-CSCF address list of the visited PLMN in the process according to the internally configured method. If the data gateway deposits its own address into the public core control entity HSS in this step, the network to which the data gateway belongs may be stored at the same time, or it may indicate that it is a gateway accessed in the form of Local Breakout.
  • Step 307 The visited PLMN data gateway replies with a bearer setup complete message to the visited SGSN/MME/AGW/ePDG, and sends the P-CSCF address list of the visited PLMN to the visited SGSN/MME/AGW/ePDG. Similarly, this message It may be sent to the local service gateway of the visited place, and then sent to the visited SGSN/MME/AGW/ePDG by the local service gateway of the visited place, and then step 309 is performed:
  • Step 308 The home PLMN data gateway replies with a bearer setup complete message to the visited SGSN/MME/AGW/ePDG, and sends the P-CSCF address list of the visited PLMN to the visited SGSN/MME/AGW/ePDG. Similarly, the message It may be sent to the local service gateway of the visited place first.
  • the PLMN gateway can be either a GGSN or a SAE GW.
  • the manner of requesting the PLMN gateway to request the P-CSCF address list of the home PLMN may also be as follows:
  • the GGSN/SAE GW of the home PLMN can be applied through the roaming interface between the PLMN gateways.
  • the method for the home GGSN/SAE GW to obtain the P-CSCF list of the home location can be performed according to existing standards; Sending a DHCP request to request the P-CSCF address information of the home location; or pre-configuring the P-CSCF address information of the home network for the user terminal, and storing the information in the HSS, the AAA server or other entity, and then the HSS to the home PLMN
  • the AAA server or other entity requests the P-CSCF address information of the home PLMN.
  • Step 309 For the 3GPP access network, the visited SGSN/MME sends the P-CSCF address list to the UE through the bearer establishment success reply. At the same time, the route mode of the established bearer may also be returned (return to the local data gateway route or from the visit)
  • the local data route indicates that the indication of the network to which the P-CSCF belongs is sent to the UE, and the UE performs the IP multimedia subsystem service by accessing the P-CSCF address list obtained by the PLMN, if there are multiple routes, multiple networks
  • the P-CSCF is optional, and the IP multimedia subsystem service can be performed by selecting a route according to the above indication and a network of the P-CSCF.
  • the AGW/ePDG/AAA Server/AAA Proxy can notify the user terminal of the routing mode when the user selects the data gateway, or can inform the user terminal after the bearer is established.
  • the method for informing the user of the routing mode of the terminal may be carried in any message exchanged with the UE, for example, extending the APN replied to the user terminal.
  • the UE When the UE initiates bearer setup, it will carry only the NI that represents the service, and may also carry the 01 indicating the operator, the reply, the 01 indicates the routing network of the bearer, and the 01 of the APN sent by the user. It is replaced with the routing network of this bearer.
  • any join field extension NI or 01 indicates that it is also possible. This indication can simply indicate the type of route, that is, the return to the local route or Local Breakout.
  • Figure 4 shows the specific flow diagram when the UE obtains the P-CSCF address list through DHCP.
  • the specific process of this embodiment is as follows:
  • Step 402 The UE sends a DHCP request to the visited PLMN gateway, where the request may carry an IP multimedia subsystem service indication of the UE, where the IP multimedia subsystem service indication includes an EMC identifier, or an indication of which PLMN's IP multimedia subsystem service is used by the UE.
  • Information to get P-CSCF address information can be either a GGSN or a SAE GW or a DHCP Server.
  • Step 403 The visiting PLMN gateway determines the service network of the IP multimedia subsystem service of the UE according to the IP multimedia subsystem service indication, the user IP multimedia subsystem subscription information, and the operator policy, that is, using the P-CSCF of the visited PLMN. Still provided by the P-CSCF belonging to the PLMN IP Multimedia Subsystem business.
  • step 404 is performed; if it is determined that the service network providing the IP multimedia subsystem service for the UE is the visited PLMN, step 407 is performed.
  • Step 404 The visited PLMN gateway may act as a proxy to send a request to the home PLMN gateway to obtain the P-CSCF address information of the home PLMN.
  • the manner in which the PLMN gateway accesses the P-CSCF address information of the home PLMN can be implemented in various ways. For example, it can be obtained from the GGSN or SAE GW of the home PLMN through the roaming interface between the PLMN gateways; or can be obtained by sending a DHCP request to the GGSN or SAE GW of the home PLMN; or can be obtained from other network entities of the home PLMN.
  • the P-CSCF address information of the home PLMN is obtained from a network entity such as the home HSS or the PCRF.
  • the DHCP request can also be sent to a DHCP server of the home PLMN to obtain the P-CSCF address information of the home PLMN. The address must be pre-configured or otherwise obtained for P-CSCF address information.
  • Step 405 The home PLMN gateway uses the internal configuration method to obtain the attribution by using the existing technology.
  • P-CSCF address information of PLMN P-CSCF address information of PLMN.
  • Step 406 The home PLMN gateway returns the P-CSCF address information of the home PLMN to the gateway of the visited PLMN, and performs step 408.
  • Step 407 The PLMN gateway accesses the P-CSCF address information to which the PLMN belongs by using the internal configuration method.
  • Step 408 The visited PLMN gateway sends the obtained P-CSCF address information to the UE.
  • the P-CSCF address information may include a P-CSCF address list, and may also include a P-CSCF domain name and a DNS server address.
  • Step 409 If the P-CSCF address information includes a P-CSCF address list, the UE selects a P-CSCF address from the P-CSCF address list to initiate IP multimedia subsystem registration and access IP multimedia subsystem services; if P-CSCF The address information includes the P-CSCF domain name instead of the P-CSCF Address, after selecting the P-CSCF, the UE needs to use the DNS server address to resolve the domain name of the P-CSCF to obtain the corresponding P-CSCF address.
  • the IP multimedia subsystem service preference indication sent by the user terminal to the network control entity the bearer route type indication sent by the network control entity to the user terminal, and the network to which the P-CSCF belongs
  • the indication, and the method by which the network control entity selects the bearer routing network data gateway for the user terminal is consistent. This example only shows the method of obtaining the P-CSCF address from the home location using the DHCP method.
  • the address of the data gateway is stored in the common core control unit HSS to ensure the service continuity of the different system handover.
  • the data gateway address stored in the HSS shall distinguish between the home gateway and the visited gateway.
  • the PLMN ID (operator ID) to which the data gateway belongs may be indicated in the HSS or AAA Server or whether the gateway belongs to the home PLMN or the visited PLMN, or whether the data gateway is a data gateway of the Local Breakout access mode.
  • the new network control entity obtains the address of the data gateway and the above indication from the HSS or AAA Server, and according to this indication, determines whether to establish a bearer to the data gateway for the user.
  • the visited network may determine the IP address of the user terminal according to the user IP multimedia subsystem subscription information of the user terminal roaming locally, the IP multimedia subsystem service indication sent by the user terminal, and the operator policy.
  • the service network of the multimedia subsystem service to determine which network P-CSCF is used to access the IP multimedia subsystem, and obtain the P-CSCF address information of the service network, and also include other service networks (ie, by visiting or belonging)
  • the user terminal implements the IP multimedia subsystem service by using the P-CSCF address information of the service network provided by the visited network and other service network information.
  • the visited network may determine the service network according to a certain policy, and the service network may be the visited network or the home network, and the number of different networks.
  • the routing bearer can also exist at the same time. Therefore, the network side selects the service network for the roaming user terminal to be flexible.
  • the operator can also determine the service network according to various needs and user preferences.
  • the user terminal can also flexibly select the network that it prefers based on the received bearer routing information and the network information of the P-CSCF. Receive business services.
  • the system of the embodiment of the present invention includes a first network 51, a second network 52, and an MME 55 entity.
  • the first network 51 is a visited network of the user terminal
  • the second network is the home network of the user terminal.
  • the first network 51 includes a service network decision unit 57 and an information acquisition and transmission unit 58, wherein the service network decision unit 57 is configured to receive the user terminal belonging to the second network when the first network performs IP multimedia subsystem registration. Determining a service network of the IP multimedia subsystem service of the user terminal and the user data routing mode information according to any one or a combination of the IP multimedia subsystem user subscription information and the operator policy of the user terminal;
  • the service network decision unit 57 may further determine the user terminal according to any one or a combination of the IP multimedia subsystem user subscription information, the operator policy, and the IP multimedia subsystem service indication from the user terminal.
  • the information acquisition sending unit 58 is configured to obtain P-CSCF address information of the service network, and provide the P-CSCF address information to the user terminal for IP multimedia subsystem registration.
  • the information obtaining and transmitting unit 58 includes a requesting unit for obtaining P-CSCF address information of the serving network, and a transmitting unit, configured to send the obtained P-CSCF address information of the serving network and the user data routing manner information to the User terminal.
  • the service network decision unit 57 and the information acquisition sending unit 58 may be located in the first gateway of the first network, or, as another implementation, the service network decision unit 57 may be located in the mobility management entity 55 of the first network, The information acquisition transmitting unit 58 may be located in the first gateway 53 of the first network. Service network decision unit 57 and information acquisition and transmission are shown in FIG. The sending unit 58 is located in the first gateway 53 of the first network.
  • the MME entity 55 may be configured to: when receiving the PDP context request from the user equipment that belongs to the second network, determine the service gateway according to the IP multimedia subsystem user subscription information and the operator policy of the user terminal, if the service gateway is visited The network gateway sends the activation PDP context request to the first gateway 53, otherwise, the PDP context request is sent to the gateway in the second network.
  • the MME entity 55 can be an independent physical entity or can be located in the SGSN as a logical entity.
  • the first gateway 53 is configured to receive the IP multimedia subsystem registration when the user terminal is locally performed.
  • the PDP context request is activated, determining a service network of the IP multimedia subsystem service of the user terminal according to the IP multimedia subsystem user subscription information and the operator policy of the user terminal; obtaining P-CSCF address information of the service network, and And providing the P-CSCF address information to the user terminal for IP multimedia subsystem service.
  • the second network 52 includes: a second gateway 54, configured to provide the first gateway 51 with P-CSCF address information of the user terminal in its own network according to the request of the first gateway 51.
  • the P-CSCF address information includes a P-CSCF address list, or includes a P-CSCF address domain name and a DNS server address.
  • the first gateway 51 provided by the embodiment of the present invention may include: a decision unit 61 and an information acquisition and transmission unit 62.
  • the determining unit 61 determines the IP address of the user terminal according to the IP multimedia subsystem user subscription information and/or the operator policy of the user terminal when receiving the default bearer setup request sent by the user terminal that belongs to the second network.
  • a service network of the multimedia subsystem service and the user data routing mode information configured to acquire P-CSCF address information of the user terminal from the service network; and send the P-CSCF address information To the user terminal.
  • the information acquisition transmitting unit 62 includes: a request unit 621 and a transmission unit 622.
  • the requesting unit 621 is configured to obtain P-CSCF address information of the serving network
  • the transmitting unit 622 is configured to send the obtained P-CSCF address information of the serving network and the user data routing manner information. To the user terminal.
  • the second gateway 52 includes a receiving unit 71 and an information acquisition transmitting unit 72.
  • the receiving unit 71 is configured to receive a request for acquiring the P-CSCF address information of the user terminal to visit the network
  • the information acquiring and sending unit 72 is configured to obtain the P-CSCF address information of the user terminal in the home network, and The P-CSCF address information is provided to the visited network.
  • an MME provided by an embodiment of the present invention includes:
  • the receiving unit 81 is configured to receive a default bearer setup request sent by the roaming user terminal, where the IP multimedia subsystem service indication of the user terminal is included;
  • the determining unit 82 is configured to determine, according to the IP multimedia subsystem service indication, the IP multimedia subsystem user subscription information, the operator policy, or a combination of the user terminal, the service gateway;
  • the sending unit 83 is configured to: when the determined serving gateway is the local network gateway, send the default bearer setup request to the local network gateway, otherwise, send the default bearer setup to the user terminal home network gateway.
  • the visited network may make a decision according to the user IP multimedia subsystem subscription information and the operator policy of the user terminal roaming locally, and determine the service network of the IP multimedia subsystem service of the user terminal to determine which one to use.
  • the P-CSCF of the network accesses the IP multimedia subsystem, and obtains the P-CSCF address information of the service network, and the user terminal implements the IP multimedia subsystem service by using the P-CSCF address information of the service network provided by the visited network.
  • the embodiment of the present invention needs to obtain the P-CSCF address information of the home network from the home network.
  • the request may be implemented by newly defining a GPRS signaling message or extending an existing GPRS signaling message to carry the request for acquiring the P-CSCF address information of the home network; if the DHCP method is adopted, the attribution is not required.
  • the network gateway makes changes, only need to visit the network structure Create a DHCP function, or directly forward the DHCP request of the user terminal. Therefore, the network gateway changes little.
  • the user terminal may send the IP multimedia subsystem service indication to the visited network gateway when the user terminal performs the IP multimedia subsystem registration request, or the visited network gateway may according to the IP multimedia subsystem service indication. Whether the user IP multimedia subsystem subscription information, the operator policy, and the visited network support the IP multimedia subsystem for decision making.
  • the network and the user terminal have the capability, and according to the user subscription, user preference, and operator policy, when the roaming can be provided by the home IP multimedia subsystem service and the visited IP multimedia subsystem service simultaneously, the network can notify The user's bearer or IP-CAN session routing and services are provided at the home, which are provided by the visit, and even inform the P-CSCF's own network (the visited service network or the home service network) for the user to select the service. Network and business.
  • the embodiment of the present invention further provides a terminal, including a mode sending module and a receiving module, where the sending module is configured to send an IP multimedia subsystem IP multimedia subsystem service request information to the visited network gateway, where the request information carries the IP of the terminal.
  • the multimedia subsystem service indication information; the receiving module is configured to receive P-CSCF address information and routing mode indication information of the service network that provides the IP multimedia subsystem service for the terminal.
  • the terminal also includes a display module for providing a user with a user interface of a service network that can select an IP multimedia subsystem service.
  • the IP multimedia subsystem IP multimedia subsystem service request information is sent to the visited network gateway, where the request information carries the IP multimedia subsystem service indication information of the terminal, and the IP multimedia subsystem service indication
  • the information is the routing mode (return to the local route or the local breakout) indicating the default bearer that the network user wants to establish, and can also represent the IP multimedia subsystem service network that the user terminal wants to use (provided by the home location or visited) of) . If the indication is only establishing a default bearer or When the IP-CAN session is used as the routing mode to indicate the user's preference, an independent message may be sent to the network control entity in the future interaction between the terminal and the network.
  • the message is used to indicate which PLMN the terminal needs to acquire. P-CSCF address.
  • the user IP multimedia subsystem service indication may be the same message or a different message.
  • the visited network determines, according to the IP multimedia subsystem user subscription information and/or the operator policy of the user terminal, the service for providing the IP multimedia subsystem service to the user terminal.
  • the internet
  • the visited network obtains the proxy call control function P-CSCF address information of the service network, and sends the P-CSCF address information to the user terminal;
  • the user terminal uses the P-CSCF address information to perform registration and service access of the IP multimedia subsystem.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un système et un appareil pour mettre en œuvre un service de sous-système multimédia IP dans un réseau visité. Le procédé comporte les opérations suivantes : lorsque l'extrémité utilisateur enregistre le service du sous-système multimédia IP dans un réseau visité, le réseau visité détermine un réseau de service d'un sous-système multimédia IP d'une extrémité utilisateur à partir des informations de signature utilisateur, d'une indication utilisateur et d'une politique de fournisseur d'un sous-système multimédia IP de l'extrémité utilisateur; le réseau visité obtient des informations d'adresse d'une fonction de commande d'appel du réseau de serveur et transmet les informations d'adresse de la fonction de commande d'appel du réseau de serveur et/ou la façon établie d'exécuter le routage à l'extrémité utilisateur ; l'extrémité utilisateur utilisant les informations d'adresse de la fonction de commande d'appel et les informations sur la façon établie d'exécuter le routage pour exécuter l'enregistrement dans un sous-système multimédia IP et accéder au service.
PCT/CN2008/070794 2007-04-26 2008-04-24 Procédé, système et appareil de mise en œuvre d'un service de sous-système multimédia ip dans un réseau visité WO2008131681A1 (fr)

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