WO2007025479A1 - Procede et systeme de communication de prestation de service multidiffusion pour utilisateur en itinerance - Google Patents

Procede et systeme de communication de prestation de service multidiffusion pour utilisateur en itinerance Download PDF

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Publication number
WO2007025479A1
WO2007025479A1 PCT/CN2006/002243 CN2006002243W WO2007025479A1 WO 2007025479 A1 WO2007025479 A1 WO 2007025479A1 CN 2006002243 W CN2006002243 W CN 2006002243W WO 2007025479 A1 WO2007025479 A1 WO 2007025479A1
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WIPO (PCT)
Prior art keywords
user
multicast service
network
home network
authorization
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PCT/CN2006/002243
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English (en)
Chinese (zh)
Inventor
Peng Zhang
Hai Zhang
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Huawei Technologies Co., Ltd.
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Publication of WO2007025479A1 publication Critical patent/WO2007025479A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/185—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with management of multicast group membership

Definitions

  • the present invention relates to multicast technologies in the field of communications, and more particularly to a method and a communication system for providing multicast services to roaming users. Background technique
  • the third generation mobile communication can provide a higher data rate service than the second generation mobile communication, thereby supporting multiple service forms. For example, video phones, picture downloads, high-speed browsing Internet networks and other services.
  • One of the characteristics of the service is that the service can simultaneously send information to users who subscribe to the service in the wireless network. For example, send weather forecasts, news clips, sports highlights, and more.
  • the third-generation mobile communication system introduced the concept of multicast/broadcast from Rel-6, which can make more efficient use of priority air interface resources and provide higher system capacity.
  • each branch of the multicast/broadcast service data transmission tree has only one data for transmission, occupying one.
  • the difference between the multicast service and the broadcast service is only that: the multicast service only sends corresponding information to users who subscribe to certain information, and the broadcast service sends information to all users in the wireless network.
  • the multicast/broadcast service provides the same information to a large number of users at the same time, which can greatly save network resources.
  • the wireless network structure supporting the broadcast/multicast service is the broadcast/multicast service server (BM-SC), and the BM-SC passes the Gmb interface or Gi.
  • the interface is connected to a Gateway GPRS Support Node (GGSN), and a BM-SC can be connected to multiple GGSNs.
  • the GGSN is connected to a Serving GPRS Support Node (SGSN) through a Gn/Gp interface, a GGSN.
  • SGSN Serving GPRS Support Node
  • the SGSN can be connected to multiple SGSNs; the SGSN can be connected to the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) through the Iu interface, and then the UTRAN 204 is connected to the User Terminal (UE) through the Uu interface, and the SGSN can also pass the Iu/
  • the Gb interface is connected to the Global System for Mobile Communications (GSM) Enhanced Radio Access Network (GERAN), which then connects to the UE via the Um interface.
  • GSM Global System for Mobile Communications
  • GERAN Global System for Mobile Communications
  • the GGSN and the SGSN belong to nodes in the core network (CN) in the wireless network.
  • the Broadcast Multicast Service Center provides functions for the provision and delivery of MBMS user services. Can be used as an access point for MBMS content transmission, authorization and initiation of MBMS bearer services in PLMN, and can be used for tune Degrees and send MBMS transmissions.
  • BM-SC must exist for MBMS user services, including membership function module, session and transmission function module, proxy and transmission function module, service announcement function module and security function module, as shown in Figure 2.
  • the BM-SC that stores the user subscription information, authorizes the user to access the MBMS service, and the BM-SC that provides the MBMS service to the user must be the same, that is, provide the MBMS service to the user.
  • the BM-SC must have the subscription information of the user, and the BM-SC that generally has the user subscription information is located in the user's home network. Therefore, in the case of roaming, the user needs to access the MBMS service, which means that the BM-SC that needs to return to the home network needs to perform service activation (authorization;), and receives the MBMS data provided by the BM-SC in the home network.
  • service activation authorization
  • some MBMS services provided by the BM-SC in the home network do not meet the needs of the user. For example, if the user subscribes to the weather report service, the most desirable situation for the user is that no matter where he is. All weather forecasts are received, not always the weather forecast for their attribution.
  • the current MBMS framework does not support roaming in this case very well, because the user always needs to access the BM-SC in the home network, and the BM-SC located in the roaming network does not have the subscription information of the roaming user.
  • the BM-SC in the roaming network cannot authorize the user; therefore, no matter where it roams, it receives the weather forecast of its home location. Therefore, in the case of roaming, local provisioning of MBMS services is not possible.
  • other multicast services that require the home network of the roaming user to authorize, there is also a problem that the multicast service cannot be directly provided by the access network.
  • the nature and content of the service determine its strong regionality. If the local provision of the service cannot be supported in the roaming situation, it will greatly affect the effectiveness of the service provision. The comprehensiveness of service deployment and user satisfaction. Therefore, the local provision of broadcast/multicast services in roaming is an important feature of the MBMS system. Therefore, how to access the network to provide local multicast services for roaming users is an urgent problem to be solved. . Summary of the invention
  • the present invention provides a method and a communication system for providing a multicast service to a roaming user, so as to solve the problem that the access network cannot provide the local multicast service to the roaming user in the prior art.
  • a method for providing a multicast service to a roaming user includes the following steps:
  • the roaming user initiates a multicast service join request
  • the GGSN initiates a multicast service authorization request to the broadcast/multicast service center BM-SC in the visited network according to the multicast service join request;
  • the BM-SC of the visited network interacts with the BM-SC of the user's home network, and one of the BM-SC pairs User authorization;
  • the BM-SC accessing the network determines whether to join the roaming user to the multicast group according to the result of the weighting.
  • the BM-SC of the user's home network authorizes the user according to the subscription information of the user, and returns the authorization result to the BM-SC in the visited network; or the BM-SC in the user's home network sends the subscription information of the user to the entertained information. Accessing the BM-SC in the network, the user is authorized by the BM-SC in the visited network.
  • the BM-SC in the access network authorizes the user according to the user's subscription information and local authorization policy.
  • the roaming user selects an access access network from the access von network or the access access network option provided by the terminal device, or the terminal device automatically selects the access access network; the terminal device
  • the access point name (APN) of the visited network is constructed according to the selection result and carried in the PDP context activation request.
  • a method for providing a multicast service to a roaming user includes the following steps:
  • the roaming user initiates a multicast service join request.
  • the GGSN in the access network initiates a multicast service authorization request to the broadcast/multicast service center BM-SC in the home network according to the multicast service join request;
  • the BM-SC in the user's home network determines whether it is suitable to provide the requested multicast service to the roaming user, and if so, proceed to step D, otherwise, proceed to step E;
  • the BM-SC in the home network of the user authorizes the roaming user, and determines whether to join the roaming user to the multicast group according to the authorization result;
  • the BM-SC accessing the network interacts with the BM-SC of the user's home network, and one of the BM-SCs authorizes the user, and the BM-SC accessing the network determines whether to join the roaming user according to the authorization result. Multicast group.
  • the BM-SC of the home network of the user directly sends the multicast service authorization request to the BM-SC of the access network; or the BM-SC of the user home network notifies the user terminal device, and the user terminal device re-initiates the pointing access network.
  • a method for providing a multicast service to a roaming user includes the following steps:
  • the roaming user initiates a multicast service join request, and the request is routed to the GGSN in the visited network;
  • the network entity in the access network determines, according to the configuration policy and/or the attribute of the requested multicast service, the BM-SC that is suitable for providing the service, and if the multicast service is suitable for being provided by the BM-SC of the user home network, proceeding Step C, if the multicast service is suitable to be provided by the BM-SC accessing the network, proceed to step D;
  • the GGSN initiates a multicast service authorization request to the BM-SC in the home network of the user, and the BM-SC in the user home network authorizes the roaming user, and determines whether to join the roaming user to the multicast group according to the authorization result.
  • the GGSN initiates a multicast service authorization request to the BM-SC in the visited network, and the BM-SC accesses the network.
  • the BM-SC interacts with the user's home network, and one of the BM-SCs authorizes the user, and the BM-SC accessing the network determines whether to join the roaming user to the multicast group according to the authorization result.
  • a broadcast/multicast service center including a membership function module for providing authorization for a user to request activation of a multicast service, and a proxy and transmission function module for transmitting signaling; wherein, the broadcast/multicast service center
  • the method further includes: an interface for receiving a multicast service authorization request and receiving authorization information, and sending a multicast service authorization request and sending authorization information.
  • a communication system includes a plurality of communication networks, each of which has a broadcast/multicast service center (BM-SC) for providing broadcast/multicast services to users, and the BM-SC includes a user request activation group.
  • BM-SC broadcast/multicast service center
  • Authorized membership function module of the broadcast service, and proxy and transmission function module for transmitting signaling characterized in that each broadcast/multicast service center has an interface for interactive authorization information, and a broadcast/multicast service The center obtains the authorization information of the requesting roaming user from the broadcast/multicast service center of the user home network through the interface according to the multicast service joining request of the roaming user.
  • the broadcast/multicast service center in the home network of the user is requested by the broadcast/multicast service center of the visited network where the roaming user is located, and the broadcast/multicast service center of the visited network is directly after the authorization is successful.
  • Providing multicast services to roaming users, especially those who have signed up for MBMS services, can obtain information related to roaming places, such as weather forecasts of roaming places.
  • the invention can not only satisfy the comprehensiveness of the service deployed by the operator and the effectiveness of providing the service, but also can improve the satisfaction of the user.
  • FIG. 1 is a schematic structural diagram of a wireless network supporting broadcast/multicast services in the prior art
  • FIG. 2 is a schematic structural diagram of a BM-SC in the prior art
  • FIG. 3 is a schematic diagram of a roaming user receiving MBMS data provided by a BM-SC in a home network in the prior art
  • FIG. 4 is a schematic diagram of a framework for providing a multicast service to a roaming user by a visited network according to an embodiment of the present invention
  • FIG. 5A and FIG. 5B are schematic diagrams showing an interface connection between BM-SCs in different networks according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a multicast service provided by a visited network to a roaming user according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of MBMS data provided by a BM-SC in a network received by a roaming user according to an embodiment of the present invention
  • FIG. 8 is a flowchart of providing a multicast service to a roaming user by selecting a BM-SC according to an embodiment of the present invention
  • FIG. 10 is a detailed flowchart of a local multicast service activation in a roaming situation according to an embodiment of the present invention. detailed description In this embodiment, a multimedia broadcast/multicast service (MBMS) in a multicast service is taken as an example for description.
  • MBMS multimedia broadcast/multicast service
  • the BM-SC located in the roaming network cannot obtain the authorization of the user from the BM-SC in the home network of the user.
  • Information and thus it is not possible to provide local MBMS services to roaming users who have subscribed to the MBMS service.
  • the invention adds an interface between the BM-SCs in each network, so that the BM-SC in the access network where the roaming user is located can interact with the BM-SC of the home network, thereby implementing the BM-SC accessing the network to the roaming user.
  • an interface is added between BM-SCs in each network. Therefore, in the case of roaming, between the BM-SC located in the visited network and the BM-SC in which the user subscription information is stored in the user home network There is an interface, and the UE accesses the BM-SC located in the visited network to provide multicast services.
  • the BM-SC located in the access network is responsible for the MBMS service-related control and the MBMS data transmission; the BM-SC located in the home network completes the authorization of the user, and provides the authorization information to the BM in the access network through the interface. SC.
  • the BM-SC located in the home network may also provide authorization information to the BM-SC in the access network, and the BM-SC in the access network completes the authorization of the user.
  • the BM-SC in the access network can directly decide whether to authorize according to the authorization information, or add some local authorization policies of the roaming network to decide whether to authorize or not, and even refer to the authorization information to determine whether to authorize according to the local authorization policy.
  • the local authorization policy such as the restriction of the service type and the limitation of the service capability is similar to the process of authorizing the user by the BM-SC in the home network.
  • the user can access the home network to receive the multicast service in the case of roaming, for example, receiving the promotion information of the home network; the user can also access the roaming network to accept the local The service, for example, receives weather information for the roaming network.
  • the choice of this access can be as follows:
  • the terminal device Providing access local (ie, roaming) and access attribution to the user on the terminal device, and preparing to initiate a multicast service join request, the terminal device points to the corresponding access point name according to the access network structure selected by the user (APN) And carrying in the PDP context activation request, establishing a connection between the appropriate GGSNs by pointing to the APN, and then transmitting a multicast service join request on the connection. For example, if the user selects the access home, the APN1 is constructed, the routing device accesses the user to the BM-SC of the home network, and the user selects to access the local, then constructs the APN2, and the routing device connects the user to the BM-SC of the roaming network. .
  • the operator can configure policies on the network entities in the network, such as configuring policies on the DNS.
  • the network entity determines whether the user is connected according to the configuration policy and/or the attributes of the service selected by the user. Into the home network, or local access to the roaming network.
  • the operator can also set the redirection function on the BM-SC. If the user accesses the BM-SC in the home grid, However, if the BM-SC determines that the service is better provided by the roaming area according to the service attribute, the BM-SC may be notified to re-access the BM-SC of the roaming place. Similarly, if the user accesses the BM-SC in the roaming network. However, the BM-SC determines that the service is better provided by the home location according to the service attribute, and may notify the user to re-access the BM-SC of the home location.
  • the BM-SC includes a membership function module, a session and transmission function module, a proxy and transmission function module, a service announcement function module, and a security function module.
  • the membership function module provides a user request to activate the MBMS service authorization, and may have an MBMS service user.
  • the registration information may also generate charging information of the MBMS service user;
  • the membership function module is a function of the MBMS bearer service layer, but may provide functions of the user service layer, for example: membership function management, key management, etc.
  • the session and transmission function module can schedule MBMS session transmission;
  • the proxy and transmission function module is a proxy server for Gmb interface point signaling transmission between the GGSN and other BM-SC sub-function entities For example: BM-SC membership function and BM-SC session and send function.
  • the proxy and transport functions can also handle and route different information interactions, which are transparent to the GGSN;
  • the service announcement function module can provide services for multicast and broadcast MBMS user services.
  • the security function module is responsible for user authentication and key distribution; the session and transmission function module is responsible for scheduling MBMS sessions, providing MBMS session related parameters (such as QoS, MBMS service areas, etc.) to the GGSN, initiating and terminating MBMS sessions, and sending MBMS data.
  • MBMS session related parameters such as QoS, MBMS service areas, etc.
  • the add-on interface can be defined as a Gt interface.
  • Gt interface After implementing the specific functional modules of the BM-SC, refer to the Gt interface structure shown in Figure 5A and Figure 5B.
  • the Gt interface is between the proxy and transport functions in the two BM-SCs, and one of the BM-SC's proxy and transport function modules receives an authorization request from the Gt interface to another BM-SC. Then, the user is authorized to obtain the subscription information of the user from the member function module, and the authorization result is sent to the corresponding BM-SC through the Gt interface, or the authorization information is sent to the corresponding BM-SC.
  • the Gt interface functions between the proxy and transport functions in the BM-SC accessing the network and the member functions in the BM-SC of the home network, and the member function modules, agents, and transmissions of each BM-SC.
  • the function modules have Gt interfaces.
  • the proxy and transmission function modules send authorization requests to other BM-SCs through the Gt interface.
  • the member function modules send authorization results or authorization information to the BM-SC requesting authorization through the Gt interface.
  • the interface between the BM-SCs can use the Diameter protocol, the SIP protocol or the MAP protocol.
  • the GGSN sends the International Mobile Subscriber Identifier (IMSI) of the user in the MBMS authorization request of the BM-SC to identify the user, and the BM-SC searches for the subscription information of the user.
  • IMSI International Mobile Subscriber Identifier
  • the user may carry the identifier of the BM-SC routing authorization request for accessing the network in the joining request, and the BM-SC and the GGSN accessing the network may route the authorization request to the BM of the user home network according to the identifier.
  • SC or, the BM-SC accessing the network converts the identifier of the available routing authorization request according to the IMSI or MSISDN of the user, The authorization request is routed to the BM-SC of the user's home network.
  • the Gt interface uses the SIP protocol, there are two ways to construct the identifier: the user terminal constructs the SIPURI, which is brought to the BM-SC in the join request; or the BM-SC constructs the tel URI according to the user's MSISDN.
  • the BM-SC analyzes the E.164 number of the BM-SC of its home network based on the MSISDN of the user.
  • the routing of the MBMS authorization request on the Gt interface is based on the domain name (realm).
  • the BM-SC in the access network can obtain the home network domain name by the following method:
  • NAI network access identifier
  • the BM-SC in the access network performs a conversion according to the user's IMSI, and derives the realm of the user's home network from the user's IMSI.
  • Step 100 The roaming UE initiates a multicast service join request to the GGSN in the visited network, and expects to access the BM-SC in the access network, and the local service provided by the UE.
  • Step 110 The GGSN initiates an MBMS authorization request to the BM-SC located in the visited network.
  • Step 120 The BM-SC that receives the MBMS authorization request determines that the user is a roaming user, and has no subscription data of the user, and sends an MBMS authorization request to the MB-SC in the home network of the user through the Gt interface.
  • Step 130 The BM-SC located in the home network authorizes the user according to the subscription information of the user, and returns the authorization information to the BM-SC in the visited network.
  • Step 140 The BM-SC in the access network returns a corresponding MBMS authorization response to the GGS according to the authorization information returned by the BM-SC in the home network of the user.
  • the BM-SC in the visited network can also return an MBMS authorization response to the GGSN in conjunction with the access network and the operator's policy.
  • the situation of accessing the network mainly refers to the resource situation. For example, the current network has less available resources, but the authorization information of the I) home network indicates that the user is provided with high service quality. At this time, the access network may be difficult to support, and the service quality can be reduced. .
  • the operator policy determines the mode and level of service provision. For example, in a certain period of time, the access of the users of the local network is preferentially guaranteed. If there are no resources remaining, the access of the roaming user is denied.
  • Step 150 Follow the existing MBMS multicast service activation process to complete other processing steps.
  • the BM-SC that provides the multicast service to the roaming user may also be determined by the BM-SC in the visited network, that is, in step 120, the BM-SC in the visited network sends the MBMS authorization to the BM-SC in the user's home network.
  • the user terminal device Before requesting, it may be determined whether it is suitable to provide the requested multicast service to the roaming user, and if so, proceed to the next step; if not, then Knowing the user terminal device, the user terminal device re-initiates a multicast service join request directed to the BM-SC of the home network, and the network entity routes the join request to the GGSN of the BM-SC that can access the user home network, and then The BM-SC decides whether to accept the user's request.
  • the user terminal automatically sends a multicast service join request according to the notification, and the user may manually select a multicast service join request directed to the access network according to the prompt on the terminal.
  • the BM-SC accessing the network can also directly route the multicast service authorization request to the BM-SC of the user's home network.
  • the roaming user receives the MBMS data provided by the BM-SC in the access network as shown in FIG. 7.
  • the main processing steps of the BM-SC for determining the multicast service to the roaming user by the BM-SC of the user home network are as follows:
  • Step 800 The roaming user initiates a multicast service join request.
  • Step 810 The network entity in the access network routes the multicast service join request to the GGSN, and the GGSN sends a multicast service authorization request to the broadcast/multicast service center (BM-SC) in the user home network.
  • BM-SC broadcast/multicast service center
  • Step 820 The BM-SC in the home network determines whether it is suitable to provide the requested multicast service to the roaming user according to the attributes of the service required by the user. If yes, proceed to step 830; otherwise, perform steps 840 to 880.
  • Step 830 The BM-SC in the home network of the user performs authorization according to the subscription information of the user, to determine whether to accept the join request of the roaming user, that is, whether to join the user to the corresponding multicast group (the processing is the same as the prior art) Reason).
  • Step 840 Send a notification message to the roaming user, and notify the user to access the network.
  • Step 850 The user terminal sends a multicast service join request, and the access network entity routes the multicast service join request to the GGSN, and the GGSN sends a multicast service authorization request to the BM-SC in the visited network.
  • the multicast service join request may be automatically sent by the user terminal according to the notification, or the user may manually select the multicast service join request directed to the access network according to the prompt on the terminal.
  • Step 860 The BM-SC accessing the network determines that the user is a roaming user, and sends a multicast service authorization request to the BM-SC of the user home network.
  • Step 870 The BM-SC of the user home network performs authorization according to the subscription information of the user, and returns an authorization response including the authorization information to the BM-SC accessing the network.
  • Step 880 The BM-SC in the access network determines whether to accept the user's join request according to the authorization information. If the authorization information indicates that the authorization is successful, the subsequent process of adding the user to the multicast group and providing the multicast service to the user is performed. If the authorization fails, the user's multicast service join request is rejected and terminated.
  • the BM-SC of the home network may also directly route the multicast service join request of the user to the BM of the access network through the Gt interface when determining the multicast service that is not suitable for providing the request to the roaming user. SC.
  • Step 900 The roaming user initiates a multicast service join request.
  • Step 910 The SGSN in the access network sends a route query request to the DNS.
  • Step 920 The DNS queries the configuration policy according to the service attribute, and determines that the BM-SC that is suitable for the service is provided. If the BM-SC is provided by the user's home network, proceed to step 930, if it is suitable to be provided by the BM-SC accessing the network. Then, proceed to step 940.
  • Step 930 The SGSN in the access network routes the multicast service join request to the GGSN of the user home network, and the GGSN initiates an MBMS authorization request to the BM-SC located in the home network, and the BM-SC performs authorization according to the subscription information of the user. , to decide whether to accept the join request of the roaming user (the processing is the same as the prior art).
  • Step 940 The SGSN in the access network routes the multicast service join request to the GGSN of the access network, and the GGSN initiates an MBMS authorization request to the BM-SC located in the visited network.
  • Step 950 The BM-SC accessing the network determines that the user is a roaming user, and sends a multicast service authorization request to the BM-SC of the user home network.
  • Step %0 the BM-SC of the user home network performs authorization according to the subscription information of the user, and returns an authorization response to the BM-SC accessing the network.
  • Step 970 The BM-SC in the access network determines whether to accept the user's join request according to the authorization response. If the authorization response indicates that the authorization is successful, the subsequent process is continued. If the authorization fails, the user's multicast service join request is rejected. .
  • Step 1001 If there is no activated PDP context, the user terminal (UE) activates a general PDP context.
  • Step 1002 The UE sends an IGMP (IPv4) or MLD (IPv6) Join message on the default PDP context, indicating that it is ready to receive a specific multicast MBMS bearer service, and the bearer service is identified by an IP multicast address.
  • IPv4 IPv4
  • MLD IPv6
  • Step 1003a The GGSN sends an MBMS authorization request to the BM-SC accessing the network (MBMS Authorization).
  • MBMS authorization requests may be included in the trace information.
  • Step 1003b In the roaming situation, the BM-SC located in the access network does not have the subscription information of the user, and the authorization of the user cannot be completed. Therefore, the BM-SC located in the visited network sends the MBMS authorization request to the user home network. A BM-SC storing user subscription information. The BM-SC in the home network completes the authorization of the user according to the subscription information of the user, and returns the authorization information to the BM-SC in the visited network.
  • Step 1003c The BM-SC returns an authorization response to the GGSN.
  • Authorization result (may be based on the sign in BM-SC
  • the information and the APN are returned by the member function to the GGSN in the MBMS Authorization Response for creating the MBMS UE context. If it is indicated in the authorization response that the UE is not authorized to receive MBMS data, the entire processing flow ends without further message exchange.
  • Step 1004a The GGS sends an MBMS Notification Request (MBMS Notification Request) to the SGSN, where the IP multicast address, the APN, and the connected NSAPI are included.
  • the NS API (Linked NS API) is configured to send the NSAPI corresponding to the PDP context of the join message; the IP multicast address is the IP multicast address requested by the UE in the join request; the APN may be different from the activated The APN corresponding to the default PDP context.
  • the APN may be resolved to a GGSN, which may be different from the GGSN that received the IG P/MLD join request.
  • the GGSN starts an MBMS activation timer because the GGSN may not receive a response from the SGSN. For example: The SGSN or the UE does not support MBMS.
  • Step 1004b The SGSN returns an MBMS Notification Response ( Cause ) to the GGSN that sends the MBMS notification request, where the reason part indicates whether the MBMS context activation will be processed. If the reason part included in the response message received by the GGSN indicates that the authorization is unsuccessful, the GGSN should not send a further MBMS notification request message, and the entire process is terminated.
  • MBMS Notification Response Cause
  • Step 1005 The SGSN sends a request to the UE for an MBMS Context Activation message (Request MBMS Context).
  • the connected NSAPI enables the UE to associate the MBMS UE context with the PDP context used to send the IGMP/MLD join message in step 2.
  • the TI is selected by the SGSN and includes a value that is not used by any other activated PDP context and other MBMS UE contexts of the UE.
  • Step 1006 The UE creates an MBMS UE context, and sends an Activate MBMS Context Request message to the SGSN, where the IP multicast address, APN, MBMS-NSAPI, MBMS bearer capability is carried.
  • the IP multicast address identifies the MBMS multicast service that the UE wants to activate.
  • the APN may specify a specific GGSN.
  • the MBMS bearer capability indicates the maximum QoS that the UE can handle.
  • the MBMS-NSAPI is selected by the UE and includes a value that is not used by any other activated PDP context and other MBMS UE contexts of the UE.
  • the SGSN needs to verify whether the MBMS bearer capability of the UE meets the requirements of the MBMS bearer service. If the SGSN determines the MBMS bearer capability required by the UE's MBMS bearer capability region, the SGSN rejects the MBMS Context Activation request and provides a reason description.
  • Step 1007a If the MBMS UE context is not established, the SGSN returns an MBMS Notification Reject Request ( Cause ) message to the GGSN that sends the MBMS Notification Request message, where the reason part indicates why the MBMS The UE context has not been able to be established.
  • Step 1007b the GGSN returns an MBMS Notification Reject Response message to the SGSN. This prevents the GGSN from continuing to send MBMS Notification Request messages. The entire process is terminated.
  • Step 1008 Perform security functions between the UE and the SGSN, for example: authenticating the UE.
  • Step 1009 In the A Gb mode, if the BSS trace is activated, the SGSN sends an Invoke Trace message (with a tracking reference, a tracking type, a trigger Id, and an OMC identifier) to the BSS.
  • the tracking reference and tracking type are copied from the tracking information, which is received from the HLR or OMC.
  • Step 1010 The SGSN creates an MBMS UE context, and sends a Create MBMS Context Request message to the GGSN, carrying an IP multicast address, APN, MBMS_NSAPI, IMSI, MSISDN, RAL IMEI-SV, RAT Type, MS Time Zone , CGI/SAI, Trace Reference, Trace Type, Trigger Id, OMC Identity, Additional MBMS Trace Info.
  • GGSN tracking is activated, the SGSN will include tracking reference, tracking type, trigger Id and OMC identification.
  • the BM-SC tracking is activated, the SGSN will include additional MBMS tracking information.
  • the SGSN will copy the tracking reference, tracking type and OMC identification from the tracking information, which is received from the HLR or OMC. Whether or not to include CGI/SAI is subject to the rules in Section 15.1.1a of TS 23.060.
  • Steps 1011a-1011b the GGSN sends an MBMS Authorization Request message ( carrying IMSI, MSISDN, RAI, IMEI-SV, RAT Type, MS Time Zone, CGI/SAI, Additional MBMS Trace Info) to the BM-SC, Authorization of the UE being activated. If BM-SC tracking is activated, GGS will include additional MBMS tracking information. Also included, CGI/SAI. The BM-SC provides an authorization decision in the MBMS Authorization Response message. The BM-SC creates the MBMS UE context.
  • Step 1012a If the GGSN does not have an MBMS bearer context for the MBMS bearer service at this time, the GGSN sends an MBMS Registration Request message to the BM-SC.
  • the BM-SC will allocate a new TMGI, which will be passed to the GGSN and the SGSN through the MBMS Registration Response message, and further, by activating the MBMS context. Accept (Activate MBMS Context Accept) message is sent to UEo
  • Step 1012b The BM-SC responds to an MBMS Registration Response message, including MBMS bearer context information for the MBMS bearer service, and adds an identifier of the GGSN that initiates the registration request to the MBMS bearer context on the BM-SC.
  • MBMS Registration Response message including MBMS bearer context information for the MBMS bearer service, and adds an identifier of the GGSN that initiates the registration request to the MBMS bearer context on the BM-SC.
  • Step 1013 The GGSN creates an MBMS UE context, and sends an MBMS context response to the SGSN.
  • the (Create MBMS Context Response) message should be used.
  • Step 1014a If the SGSN does not have MBMS bearer context information for the MBMS bearer service at this time, the SGSN initiates an MBMS Registration Request message to the GGSN.
  • Step 1014b The GGSN responds to an MBMS Registration Response message, where the MBMS bearer context information for the MBM bearer service is included, and the identifier of the SGSN that initiates the registration request is added to the "List" in the MBMS bearer context on the GGSN. Of downstream nodes" parameters.
  • Step 1015 If at least one PS RAB is established for the UE at this time, the SGSN provides the MBMS UE context to the RAN of the Iu mode.
  • Step 1016 In the Iu mode, if the tracking is activated, the SGSN sends an Invoke Trace message (carrying tracking reference, tracking type, triggering Id and OMC identifier) to the RAN.
  • the tracking reference and tracking type are copied from the tracking information, which is received from the HLR or OMC.
  • step 16 When the tracking activation is triggered by signaling, step 16 is applied. Other optional methods are triggered by the OMC to trigger the trace. The details of the tracking activation process are described in TS 32.422.
  • Step 1017 The SGSN sends an Activate MBMS Context Accept message (carrying TMGI, MBMS bearer capability) to the UE.
  • the MBMS bearer capability indicates the maximum QoS used by the MBMS bearer service. When more MBMS bearer services are activated, the MBMS bearer capability can be taken into consideration. If the MBMS bearer capability of the UE is not verified in step 6, the MBMS bearer capability of the UE can be verified at this time. If the SGSN determines that the MBMS bearer capability of the UE is lower than the required MBMS bearer capability, the SGSN rejects the MBMS Context Activation Request and returns the appropriate reason. At the same time, the SGSN initiates a deactivation process to deactivate the established MBMS UE.

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

Abstract

Ce procédé de prestation de service de multidiffusion à un utilisateur en itinérance consiste à: lancer une demande d'accès de service multidiffusion par l'utilisateur en itinérance; lancer une demande d'autorisation de service de multidiffusion par GGSN noeud de prise en charge de GPRS du réseau visité dirigée au centre de service de diffusion/multidiffusion du réseau visité d'après la demande d'accès; faire interagir le centre de service de diffusion/multidiffusion du réseau visité avec le centre de service diffusion/multidiffusion du réseau domestique, l'un des centres de service diffusion/multidiffusion autorisant l'utilisateur; déterminer si l'utilisateur en itinérance est autorisé à se joindre à un groupe de multidiffusion d'après le résultat obtenu. L'invention concerne aussi un centre de service de diffusion/multidiffusion et un système de communication.
PCT/CN2006/002243 2005-08-31 2006-08-31 Procede et systeme de communication de prestation de service multidiffusion pour utilisateur en itinerance WO2007025479A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004112328A1 (fr) * 2003-06-13 2004-12-23 Samsung Electronics Co., Ltd. Procede de mise a jour de zone de routage (ra) d'equipement utilisateur (ue) a service de diffusion multimedia et multidiffusion (mbms) dans un systeme de communication
WO2005067201A1 (fr) * 2003-12-12 2005-07-21 France Telecom Procede et systeme de diffusion multicast vers un terminal nomade en fonction de sa localisation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004112328A1 (fr) * 2003-06-13 2004-12-23 Samsung Electronics Co., Ltd. Procede de mise a jour de zone de routage (ra) d'equipement utilisateur (ue) a service de diffusion multimedia et multidiffusion (mbms) dans un systeme de communication
WO2005067201A1 (fr) * 2003-12-12 2005-07-21 France Telecom Procede et systeme de diffusion multicast vers un terminal nomade en fonction de sa localisation

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