WO2008040243A1 - A method, multicast-broadcast device and system for a terminal terminating multicast-broadcast service - Google Patents

A method, multicast-broadcast device and system for a terminal terminating multicast-broadcast service Download PDF

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Publication number
WO2008040243A1
WO2008040243A1 PCT/CN2007/070740 CN2007070740W WO2008040243A1 WO 2008040243 A1 WO2008040243 A1 WO 2008040243A1 CN 2007070740 W CN2007070740 W CN 2007070740W WO 2008040243 A1 WO2008040243 A1 WO 2008040243A1
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WO
WIPO (PCT)
Prior art keywords
mbs
terminal
service
exit
gateway
Prior art date
Application number
PCT/CN2007/070740
Other languages
French (fr)
Chinese (zh)
Inventor
Wei Zhang
Wenliang Liang
Chengyan Feng
Yuankui Zhao
Chaolin Ren
Musen Li
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNA2006101270821A external-priority patent/CN101155328A/en
Priority claimed from CN2007100048477A external-priority patent/CN101150852B/en
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008040243A1 publication Critical patent/WO2008040243A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • 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

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, a multicast broadcast device, and a system for a terminal to exit a multicast broadcast service in a global access network.
  • IEEE 802.16 mainly includes three standards of 802.16a, 802.16 RevD and 802.16e.
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX is the industry's wireless metropolitan area network access technology based on the IEEE 802.16 series of standards. Its basic goal is to provide a point-to-multipoint network in the metropolitan area network. In a multi-vendor environment, broadband wireless access means can be effectively interoperable.
  • the 802.16 series of standards specifies the protocol layer of the air interface part of the WiMAX system, including the physical layer (PHY) and the Medium Access Control (MAC) layer.
  • the PHY layer physically performs modulation, demodulation, and codec operations on the signal
  • the MAC layer mainly implements the media access control function of the WiMAX system.
  • FIG. 1 shows the WiMAX end-to-end reference model.
  • the R1 interface is a wireless air interface and is mainly defined by IEEE802.16d/e.
  • the remaining interfaces are all wired interfaces.
  • WiMAX mainly includes a mobile station (Mobile Station, referred to as "MS”) / Subscriber Station ("Snack Station”), an Access Service Network ("ASN”) and a connection service network ( Connectivity Service Network, referred to as "CSN”).
  • MS Mobile Station
  • ASN Access Service Network
  • CSN Connectivity Service Network
  • the ASN is defined as a set of network functions for providing WiMAX user terminals with radio access services.
  • the ASN includes a base station BS and an ASN gateway (ASN GateWay abbreviation "ASN-GW”) network element, and an ASN may be shared by multiple CSNs.
  • ASN-GW ASN GateWay abbreviation "ASN-GW”
  • the main functions of the ASN include the functions of the BS and the functions of the ASN-GW.
  • the functions of the BS are: providing L2 connection of BS and user station SS/MS, radio resource management, measurement and power control, and compression and encryption of air interface data.
  • the functions of ASN-GW include: providing proxy function for SS/MS authentication, authorization and accounting functions; supporting network discovery and selection of Network Service Provider (NSP); providing L3 for SS Relay function of information, such as IP address allocation.
  • the CSN is defined to provide IP connection services for WiMAX user terminals.
  • the CSN mainly provides the following functions: IP address allocation of SS/MS, Internet access, authentication, authorization, and accounting (Authorization Authorization, Account, AAA) proxy or server, user-based authorization. Control, ASN to CSN tunneling, WiMAX subscriber billing and inter-operator billing, tunneling between CSNs, ASN switching, and various WiMAX services (eg location-based services, multimedia) Broadcast and broadcast services, IP multimedia subsystem services).
  • the MS/SS is a (mobile) terminal, and the user uses the terminal to access the WiMAX network.
  • MMS Broadcast & Broadcast Service
  • IP Internet Protocol
  • WiMAX defines the MBS service, which is a point-to-multipoint service that provides a data source to send data to multiple users in a mobile network, realizes network resource sharing, and improves utilization of network resources. Especially the air interface resources.
  • the MBS defined by WiMAX can not only realize plain-text low-rate message-like multicast and broadcast, but also realize multicast and broadcast of high-speed multimedia services, which undoubtedly conforms to the trend of future mobile data development.
  • a service flow identifier (“SFID") is used to identify different one-way service flows, and CIDs are used to identify different connections. All service flows are controlled by media access in the air interface (Medium Access).
  • the connection of the Control abbreviated as "MAC” layer, is transmitted, and the traffic is transmitted on the corresponding connection by mapping between the SFID of the service flow and the CID connected to the MAC layer.
  • the MBS service based on the WiMAX network also identifies the multicast connection through the multicast connection identifier (Multicast CID), and identifies a multicast service through the MBS Contents ID, which is transmitted on a Mulicast CID.
  • a Protocol Data Unit (“PDU”) may contain one or more MBS services.
  • some globally defined service flows may carry broadcast or multicast information to multiple terminals. These service flows include Quality of Service (QoS) parameters. To improve service security, It can be encrypted with a globally defined data encryption key.
  • QoS Quality of Service
  • the MBS service based on WiMAX network supports two access modes: single base station access and multiple base station access.
  • MBS Zone identified by MBS_zone ID
  • MBS GSA Multicast Group Security Association
  • the content of the same MBS service stream is sent, and the terminal that registers the MBS service can receive the MBS service data through multiple base stations in the MBS domain, and the terminal in the idle state does not need to re-establish the connection when moving across the base station in the MBS zone, or Affected receiving MBS services, seamlessly switching MBS services.
  • an MBS connection link can be established by "DSA-REQ” / "DS A-RSP", and the MBS content identifier broadcast by the terminal MBS domain is notified to instruct the terminal to receive MBS service data.
  • the terminal can receive the MBS service data through multiple base stations in the MBS domain, The terminal in the state, when performing cross-base station mobility in the MBS domain, does not need to re-enter the network and re-establish the MBS service connection, and can receive the MBS service without being affected, and realize the MBS. Seamless switching of business.
  • the prior art does not involve related processing that needs to be performed when leaving the MBS service. That is to say, when the terminal does not want to receive the MBS service (for example, when the user does not want to receive the MBS service again, or when the terminal switches to the cell that does not support the MBS service that is subscribed to it) or the MBS service ends, the terminal cannot exit the related MBS service.
  • the present invention provides a method, device, and system for a terminal to exit a multicast broadcast service, so that a terminal in a WiMAX network can normally exit the MBS service.
  • the present invention provides a method for a terminal to exit a multicast broadcast service in a microwave access global interworking network, including the steps of:
  • the MBS server After receiving the request for the terminal to withdraw from the MBS or the condition for terminating the service provided to the terminal, the MBS server instructs the network side key management entity to stop performing the MBS key update for the terminal.
  • the present invention also provides a multicast broadcast system, including at least one MBS server for providing an MBS service, and a bearer network connecting the MBS server and the terminal, the MBS server is further configured to exit the MBS at the receiving terminal. After the condition for requesting or terminating the service for the terminal is satisfied, the network side key management entity is instructed to stop performing the key update of the MBS for the terminal.
  • the present invention further provides a multicast broadcast device, comprising: a receiving determining unit and an indication processing unit, wherein the receiving determining unit comprises: a receiving subunit and/or a determining subunit, wherein
  • the receiving subunit is configured to receive a request for the terminal to withdraw from the MBS;
  • the determining subunit is configured to determine whether the condition for terminating the service provided by the terminal is satisfied; the indication processing unit is configured to satisfy, according to the received request that the terminal exits the MBS, or terminate the service for providing the terminal When the network side key management entity is instructed to stop performing key update of the MBS for the terminal.
  • the present invention will modify the context of the terminal and/or the context of the related MBS service after the MBS server receives the request for the terminal to withdraw from the MBS or terminate the service for providing the terminal, and stops the MBS service charging. And the network side key management entity stops the key update for the terminal, so that the terminal can normally exit the MBS service when actively initiating the request or passively stopping receiving the MBS service.
  • Figure 1 shows an end-to-end reference model in a prior art WiMAX network
  • FIG. 2 is a flow chart of a method for a terminal to exit an MBS in a WiMAX network according to a first embodiment of the present invention
  • FIG. 3 is a flow chart of a method for a terminal to exit an MBS in a WiMAX network according to a second embodiment of the present invention
  • FIG. 4 is a flowchart of an embodiment of a method for a terminal to exit a multicast broadcast service according to a third embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to a fourth embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to a fifth embodiment of the present invention.
  • FIG. 7 is a flowchart of deleting a terminal side MBS service on the network side according to a sixth embodiment of the present invention
  • FIG. 8 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to a seventh embodiment of the present invention
  • FIG. 9 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to an eighth embodiment of the present invention.
  • Figure 10 is a flow chart showing a method of a terminal exiting an MBS in a WiMAX network according to a ninth embodiment of the present invention.
  • the MBS server After receiving the request for the terminal to exit the MBS or the condition for terminating the service provided by the terminal, the MBS server will modify the context of the terminal, stop the MBS service charging, and stop the key update for the terminal, so that the terminal actively initiates the request or passively stops.
  • the MBS service can be normally quit, and the charging of the MBS service is stopped.
  • the terminal exits the MBS service and has the following possibilities:
  • the terminal actively quits the MBS The user may no longer wish to receive the MBS due to the activation state, which may trigger the exit process.
  • the exit process may be initiated by the terminal in the active state.
  • the terminal moves out of the MBS domain that originally received the service, thereby causing the terminal to exit the MBS.
  • the exit process may be initiated by the network side proxy terminal; or the terminal may initiate the exit MBS process before the shutdown in the active state;
  • the MBS server requires the user to quit MBS: possibly due to insufficient prepaid user balance; and so on.
  • the network device such as the Paging Controller ("PC"); the proxy terminal initiates the exit of the MBS service: the anchor PC may initiate the service deactivation to the MBS server due to the shutdown of the idle state terminal; Or because the terminal moves across the MBS domain, as an optimization scheme, the base station/gateway/anchor PC can initiate a service deactivation to the MBS server by the proxy terminal; or because the terminal abnormally exits the network, the anchor gateway/anchor PC proxy the terminal to the MBS server. Initiate business deactivation; and so on.
  • PC Paging Controller
  • the first embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network, as shown in FIG. 2 .
  • the terminal in this embodiment is an active terminal, and the serving gateway of the terminal provides the terminal with the corresponding MBS.
  • the anchor gateway forwards the IGMP data of the request to the control plane, and the control plane maps the multicast group address contained therein to the specific The MBS, and notify the service gateway where the terminal is located, the terminal wants to exit a certain MBS service, and the notified message content includes: terminal ID, terminal NAI, service ID, content identifier, IP multicast address, and the like.
  • the complete IGMP message can also be encapsulated in the above message and sent to the service gateway.
  • step 203 after the serving gateway receives the message sent in step 202, or if the message in step 201 is processed by the serving gateway, the message is identified on the service gateway data plane and processed by the control plane, the serving gateway is corresponding to
  • the MBS server initiates an MBS service exit request, which indicates that the request to exit the MBS service, and the message content further includes: a terminal ID (MSID), a terminal NAI (MS NAI), a service ID (Service ID), a content identifier (Content ID), and an IP multicast. Address, Leave Indicator, etc.
  • the complete IGMP message can also be encapsulated in the above message and sent to the MBS server.
  • the MBS server is enabled to uniquely determine the terminal and the corresponding MBS that need to exit the MBS according to the message. Then, proceeding to step 204, after receiving the request, the MBS server confirms the validity of the content of the message, and after confirming the validity, returns a successful response message to the monthly service gateway, and can simultaneously modify the context and service context of the terminal, and The MBS charging of the terminal is stopped, and the network side key management entity is notified to stop the key update of the MBS for the terminal.
  • the modifying the terminal context refers to deleting the MBS service related information from the terminal context; modifying the service context refers to deleting the terminal related information from the service context; and modifying the terminal context and modifying the service context as described below. The meanings are the same here, and will not be mentioned later.
  • the serving gateway borrows an R6 interface message, such as an RR REQ (Resource Reservation Request) message, to send a corresponding MBS exit message to the base station of the terminal, where the message content includes the MSID, the MBS.
  • R6 interface message such as an RR REQ (Resource Reservation Request) message
  • RR REQ Resource Reservation Request
  • Information such as the service flow identifier corresponding to the service and the exit service indication.
  • the base station borrows an R1 interface message, such as a DSD REQ (Dynamic Service Delete Request) message, to notify the corresponding terminal to complete the exit MBS process, and the message content includes the MSID, the service flow identifier corresponding to the MBS service, and Exit the business instructions and other information.
  • an R1 interface message such as a DSD REQ (Dynamic Service Delete Request) message
  • the terminal returns a corresponding message, such as DSD, to the base station.
  • the base station carries the MBS service in a point-to-point (PTP) mode
  • PTP point-to-point
  • the air interface resource corresponding to the terminal MBS is released in the DSD process to prevent the air interface resource from being vacant, causing waste of resources
  • the point-to-multipoint (“ ⁇ ") mode carries the MBS service, and the DSD process only acts as a notification, and the terminal releases its resources by itself.
  • the base station then returns a corresponding exit response to the serving gateway to notify the service gateway terminal side that the MBS exit has been successfully completed.
  • the service gateway then sends an MBS exit confirmation to the MBS server.
  • the process proceeds to step 210.
  • the MBS server After receiving the confirmation message, the MBS server returns a success response ACK to the service gateway, indicating that the terminal has successfully exited the MBS, and then modifying the context and service context of the terminal, stopping the MBS charging of the terminal, and notifying the network.
  • the side key management entity stops the key update of the MBS for the terminal. By stopping the update of the key of the MBS service for the terminal, when the MBS service key is changed, the terminal cannot continue to use the MBS service, and the method ensures that the terminal is in the The MBS is terminated after the billing is stopped.
  • the MBS server stops the MBS of the terminal, multiple signaling interactions are performed, thereby ensuring the security of the terminal exiting the MBS.
  • the serving gateway returns a corresponding exit ACK to the base station, notifying the base station that the MBS server has officially terminated the terminal using the MBS and has stopped the corresponding charging.
  • Steps 209 through 211 are optional steps. If context modification, charging, and key related operations have been performed in step 204, steps 209 through 211 may not be performed.
  • the service gateway notifies the anchor gateway to modify the context of the user, and deletes the MBS service related information that has been exited.
  • the base station proceeds to step 213, where the base station modifies the terminal context and the
  • the MBS business context and simultaneously modify the user count of the MBS service, reduces the user count by one. If the MBS is carried in the PTM mode and the modified user count is less than the first threshold, the accurate statistics of the number of the MBS users are triggered. If the number of users accurately counted satisfies the condition for carrying the MBS in the PTP mode, the MBS is The bearer mode is switched from the PTM mode to the PTP mode. If the modified user count is 0, the exact statistics of the number of MBS users are also triggered. If the number of users counted is still 0, then the process proceeds to step 214 where the base station initiates to the serving gateway.
  • the registration process is performed, and the service gateway is notified to not distribute the MBS service data to the base station, and the bearer corresponding to the MBS between the base station and the serving gateway may be removed at the same time, and the air interface resources corresponding to the MBS are released (including the air interface resources in the PTP mode). Or air interface resources in PTM mode).
  • the user count of the MBS identifies the number of terminals in the active state using the MBS, and the number may be changed according to the process in which the terminal participates in and exits the MBS, because in addition to the active state terminal, there may be an idle state.
  • the terminal uses the MBS, and the number of terminals using the MBS in the idle state cannot be clearly identified by the user count.
  • the base station may temporarily modify only the number of users of the MBS, and then select a process of triggering the number of users according to the current number of users to reduce the number of users. The possibility of the base station being useless.
  • the base station notifies the service gateway that it no longer needs to distribute data, there is no service gateway. If any of the base stations continues to receive the MBS service, the service gateway does not need to receive the MBS service again, and then proceeds to step 215, the service gateway initiates a deregistration process to the MBS server, notifying the MBS server not to distribute the service to the service gateway.
  • the MBS service data may also release the bearer at the same time. The manner of releasing the bearer may be to remove the tunnel corresponding to the MBS or the multicast group leaving the MBS, so as to use the available resources for other required services.
  • the anchor gateway replaces the serving gateway to perform related signaling transmission and operation.
  • the MBS proxy function entity includes a signaling plane function and a data plane function; wherein the signaling plane function is mainly responsible for signaling forwarding between the ASN entity and the MBS server and controlling resources of the MBS in the ASN;
  • the face function is mainly responsible for receiving MBS service data from the MBS server and distributing it to each gateway that carries the MBS.
  • the IGMP message in this embodiment is only a manifestation of application layer signaling, and the terminal can directly interact with the MBS server through any form of application layer signaling (the WiMAX bearer network only serves as a bearer, and the signaling content). If the MBS server does not perceive the signaling of the MBS service, the MBS server may only instruct the key management entity to stop updating the key for the terminal and stop charging the user. If the network is aware of the bearer, the MBS server may notify the bearer network after the signaling of the MBS service is removed from the terminal.
  • the specific steps and implementations are similar to the steps 205 to 215, and are not mentioned here.
  • the second embodiment of the present invention is substantially the same as the first embodiment, and also relates to a method for a terminal to exit the MBS in a WiMAX network, as shown in FIG.
  • the terminal in this embodiment is also an active terminal, and the service gateway of the terminal provides the terminal with the corresponding MBS.
  • step 301 the terminal borrows the R1 interface message, such as
  • the DSD REQ message informs the base station that the terminal wants to quit the MBS service, and the message carries the Multicast CID, Traffic CID or / and service of the MBS that wishes to exit.
  • the base station borrows the R6 interface message, for example, the RR REQ message notifies the service gateway that the terminal requests to exit the MBS, and the message also carries the MBS that wishes to exit. Multicast CID, Traffic CID or / and service ID.
  • the serving gateway initiates an MBS service exit request to the MBS server, where the request indicates that the MBS service is requested to be withdrawn, and the message content further includes: a terminal ID (MSID), a terminal NAI (MS NAI), and a service ID (Service). ID), Content ID, IP Multicast Address, Leave Indicator, etc.
  • MSID terminal ID
  • MS NAI terminal NAI
  • Service service ID
  • Content ID Content ID
  • IP Multicast Address IP Multicast Address
  • Leave Indicator etc.
  • the MBS server confirms the validity of the message content, returns a successful response message to the service gateway after confirming the validity, and can simultaneously modify the context and the MBS service of the terminal.
  • Context Stop the MBS charging of the terminal; notify the network side key management entity to stop the key update of the MBS for the terminal, or perform any one or a combination thereof.
  • the serving gateway borrows the corresponding R6 interface message, such as an RR RSP message, to send an MBS exit response message to the base station of the terminal, where the content of the response message includes the MSID and the corresponding MBS service.
  • Information such as the service flow identifier and the exit service indication.
  • the base station borrows the corresponding R1 interface message, for example, the DSD RSP message notifies the corresponding terminal to complete the exit MBS process, and the message content includes the MSID, the service flow identifier corresponding to the MBS service, and the exit service indication. information.
  • the terminal may selectively return an exit response to the base station, and notify the base station that the terminal has confirmed to exit the MBS. If the base station carries the MBS service through the PTP mode, the base station can release the air interface resource corresponding to the MBS of the terminal to prevent the air interface resource from being vacant, resulting in waste of resources. Then proceed to step 308.
  • Steps 308 to 315 are similar to steps 208 to 215, and are specifically referred to above, and are not described herein again.
  • the third embodiment of the present invention is substantially the same as the implementation process of the second real-time mode, and is also related to
  • the method for the terminal to exit the MBS in the WiMAX network is shown in Figure 4.
  • the terminal in this embodiment is also an active terminal, and the serving gateway of the terminal provides the terminal with the corresponding MBS.
  • Step 401 The terminal actively sends an exit MBS service (such as a DSD-REQ message) to the ASN, requesting to quit an MBS service.
  • the parameters carried by the message include: MBS service identifier (which can be SFID, Or MBS Contents ID, or multicast IP address/port number, or proof authority Authentication Token, Multicast CID, etc., and/or MBS Service, but not limited to this.
  • Step 402 The ASN sends a terminal to the PF to quit the MBS service request message (for the roaming scenario, to be transferred between the V-PF and the H-PF), and the parameters carried by the message include: an MBS service identifier and/or a deletion indication, but Not limited to this.
  • Step 403 The PF sends a terminal to the MBS server to quit the MBS service request message, and the parameters carried by the message include: an MBS service identifier and a deletion indication.
  • Step 404 After the MBS server performs the policy, the MBS service response message is sent to the PF, and the parameters carried by the message include: an MBS service identifier and a processing result.
  • the MBS server modifies the MBS service context and the terminal context, stops charging the terminal user, and stops distributing the key to the terminal user.
  • Step 405 The PF sends a terminal to the ASN to exit the MBS service response message.
  • the parameters carried in the message include: MBS service identifier and processing result.
  • Step 406 The ASN and the terminal continue the DSD process, and complete the MBS resource deletion process on the terminal side. After this step, the transmission mode transition and the adjustment of the bearer may be initiated, and the specific implementation process is similar to the above embodiment, and will not be described here.
  • a fourth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network, as shown in FIG. 5.
  • the terminal in this embodiment is a terminal in an idle state.
  • the terminal in the idle state can implement the exit of the MBS service through the existing Location Update procedure.
  • the process proceeds to step 501, and the terminal notifies the base station that the terminal wants to exit the MBS, and may specifically notify by using the extended "Rng_Req" message.
  • the action code is Location Update.
  • the terminal adds the MBS service identifier and the Multicast CID, SFID, Content ID, etc. in the "Rng_Req” message, and can also add the MBS exit message to the message. logo.
  • the base station may directly notify the anchor PC or notify the anchor point through the relay PC through the request message, such as the "Location Update Req" message, to notify the anchor PC according to the normal Location Update process.
  • the "Location Update Req" message includes one of the identifier of the exit MBS and one of the MBS service identifier, the multicast CID, the SFID, the Content ID, or any combination thereof.
  • the anchor PC processes the message according to the existing Location Update process. If the discovery message includes the identifier of the exit MBS, the anchor PC sends the message to the MBS.
  • the corresponding server initiates the exit MBS service authorization request, and the message includes the MSID, the NAI, and the corresponding MBS identifier.
  • the MBS server performs corresponding authorization, and after the MBS server confirms the authorization, returns a successful response message to the anchor PC. It is also possible to modify the context of the terminal and the MBS service context at the same time, and stop the MBS charging of the terminal and notify the network-side key management entity to stop the MBS key update for the terminal.
  • the anchor PC returns a response message to the base station side according to the existing Location Update process, such as "Location Update Response", and the message may also return directly to the base station or indirectly to the base station through the relay PC.
  • the message contains the MBS identifier and a confirmation ID that the terminal exits the service.
  • the base station after verifying the validity of the "Rng_Req” message sent by the terminal, notifies the terminal that the Location Update is successful through the corresponding "Rng_Rsp” message. Indicates that the corresponding MBS has exited.
  • the MBS ID and the result ID are included in the "Rng_Rsp" message.
  • the terminal may selectively return a corresponding response message to the base station.
  • the base station returns a "Location Update Confirm" message to the anchor PC according to the Location Update process, where the message includes the identifier of the terminal exiting the MBS and the corresponding MBS identifier, and the anchor PC terminal is notified that the packet has succeeded. Exiting MBS was confirmed.
  • the anchor PC successfully receives the "Location Update Confirm" message, it interacts with the MBS server, sends an exit confirmation to the MBS server, and notifies the MBS server that the terminal has completely exited the specified MBS service.
  • the MBS server modifies the terminal context and/or modifies the MBS service context, and stops the MBS charging of the terminal, instructing the network side key management entity to stop the MBS secret to the terminal. Key update.
  • the exit ACK is then returned to the anchor PC.
  • the anchor PC returns a corresponding exit ACK to the base station, notifying the base station that the MBS server has officially terminated the terminal using the MBS and has stopped the corresponding charging.
  • Steps 509 through 511 are optional steps. If context modification, charging, and key related operations have been performed in step 504, steps 509 through 511 may not be performed.
  • the anchor gateway should also be notified to modify the saved terminal context information.
  • a fifth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network.
  • the terminal does not actively exit the MBS, but when the condition for terminating the service to the terminal is satisfied (such as insufficient balance), the MBS server terminates the MBS service of the terminal, as shown in FIG. 6.
  • the process proceeds to step 601, and the MBS server sends an MBS service exit indication to the gateway (service gateway or anchor gateway) that carries the MBS for the terminal.
  • the indication message includes: MSID, NAI, MBS service identifier, MBS content identifier, etc., and uniquely determines the terminal that needs to exit the MBS and the corresponding MBS.
  • the MBS server can modify the context of the terminal and the MBS service context at the same time, and stop the MBS charging of the terminal and stop the MBS key update of the terminal through the network side key management entity.
  • the serving gateway or the anchor gateway confirms the message according to the previously saved user information. And return a response message.
  • the MBS server may perform corresponding operations at this time if the MBS server does not perform related context modification and key and charging related operations in step 601. Since the network side key management entity stops updating the key for the terminal, and the MBS key update is still performed normally, the terminal cannot continue to use the MBS. In order to force the terminal to immediately stop using the MBS, the MBS server can initiate an MBS service key update process after confirming that the MBS is no longer provided for the terminal, so that the terminal cannot continue to use the MBS through the original key.
  • Steps 602, 603 are optional here, and if they do not occur at this time, they may wait until steps 608, 609.
  • the serving gateway or the anchor gateway borrows the R6 interface message, and the RR REQ message informs the base station of the terminal that the terminal can no longer use the MBS service.
  • Message content contains MSID, service flow identifier corresponding to the MBS service, and information such as the exit service indication.
  • the base station borrows the R1 interface message, for example, the DSD REQ message notifies the corresponding terminal to exit the MBS, and the message content includes the MSID, the service flow identifier corresponding to the MBS service, and the information of the exit service indication.
  • the terminal returns a corresponding response message to the base station, such as
  • the base station carries the MBS service through the PTP mode, the air interface resource of the terminal MBS is released in the DSD process to prevent the air interface resource from being vacant, resulting in waste of resources. If the base station carries the MBS service through the PTM mode, the DSD process only starts. The role of the announcement, the terminal itself releases its resources. Then proceed to step 507.
  • Steps 608 and 609 are optional steps. If steps 602 and 603 have been executed, the two steps do not have to be performed. If the steps 602 and 603 are not performed, the execution is performed here, and the execution content is consistent with 602 and 603.
  • Steps 610 to 613 are similar to steps 208 to 214, wherein steps 610 to 611 are optional, that is, the serving gateway or the anchor gateway may send an MBS exit confirmation to the MBS server, and receive an ACK response from the MBS server. Afterwards, the anchoring gateway is notified to modify the terminal context, and then the corresponding exit ACK is returned to the base station; or after receiving the exit response from the base station, the serving gateway or the anchor gateway notifies the anchoring gateway to modify the terminal context, and deletes the MBS information.
  • steps 610 to 611 are optional, that is, the serving gateway or the anchor gateway may send an MBS exit confirmation to the MBS server, and receive an ACK response from the MBS server. Afterwards, the anchoring gateway is notified to modify the terminal context, and then the corresponding exit ACK is returned to the base station; or after receiving the exit response from the base station, the serving gateway or the anchor gateway notifies the anchoring gateway to modify the terminal context, and deletes the MBS information.
  • the sixth embodiment of the present invention is similar to the fifth embodiment.
  • the MBS server actively terminates the MBS service of the terminal, as shown in FIG. 7.
  • Step 701 The MBS server sends a terminal exit request to the PF, where the parameters carried by the request may include an MBS service identifier and a terminal identifier (such as a network access identifier NAI) for identifying the terminal.
  • the network side key management entity is instructed to stop updating the key for the terminal.
  • Step 702 The PF (Policy Function) sends a terminal exit request to the ASN, where the parameters carried by the request may include an MBS service identifier and a terminal identifier (such as a network access identifier NAI) for identifying the terminal.
  • the PF sends an MBS delete request to the ASN, the ASN modifies the MBS service context and the terminal context.
  • MBS Server - PF Anchor SFA - Serving SFA (Service Business Authorizer).
  • Step 703 The ASN sends a terminal to the terminal to quit the MBS service request, for example, the ASN passes the dynamic The service deletion request message DSD-REQ sends an MBS service deletion request to the terminal, and sends an MBS service modification request to the terminal through the dynamic service modification request message DSC-REQ.
  • the parameter carried in the message may be an MBS service identifier and/or a multicast indication (MBS Service).
  • MBS service identifier can be an SFID, an MBS Contents ID or a multicast IP address/port number, a Multicast CID, an MBS GSA ID, or an authorization token.
  • Step 704 The terminal processes the request and returns the processing result to the ASN. If the MBS service is deleted, the terminal deletes the resources related to the MBS service.
  • Step 705 The ASN returns to the PF to delete the MBS service response.
  • Step 706 The PF returns a MBS service response to the MBS server.
  • the transmission mode transition and the adjustment of the bearer may be caused, which are similar to the above embodiment, and are not described herein again.
  • a seventh embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network.
  • the terminal in this embodiment is an idle state terminal.
  • the anchor PC acts as a proxy instead of the idle state.
  • the terminal initiates the exit of the MBS service, as shown in Figure 8.
  • the anchor PC finds that the idle state terminal exits the network.
  • the idle state terminal exits the network, and the terminal can be shut down in the idle mode, after a successful location update process with the network identifier (Power Down Location Update); or one of the network side AAA server, the external proxy, the anchor PC or Any combination of the idle state terminal is triggered to exit the network; or the anchor PC finds that the idle state terminal is abnormally dropped.
  • the MBS service information of the terminal saved by the anchor PC finds that the base station after the location update process belongs to a different MBS domain than the previous base station for the MBS service that the terminal is receiving.
  • the anchor PC sends an MBS service exit request to the associated MBS server according to the saved MBS service information of the terminal, requesting to quit the MBS service.
  • the MBS server modifies the context of the terminal and/or the context of the MBS service, and stops the MBS charging of the terminal, and notifies the network-side key management entity to stop performing MBS on the terminal. Key update. Therefore, when the terminal is shut down unexpectedly, the terminal can normally exit the MBS service and stop charging for the service.
  • the anchor PC needs to further notify the anchor gateway to modify the terminal. Side context.
  • An eighth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network.
  • the anchor gateway acts as a proxy, instead of the terminal, initiates the exit of the MBS service, specifically, for example, Figure 9 shows.
  • the anchor gateway discovers that the terminal exits the network.
  • the anchor gateway receives a message from the serving gateway or the serving base station for instructing the user to quit the network, and the message may register the message for the data channel;
  • the anchor PC processes the network retreat process, the anchor PC notifies the corresponding anchor gateway that the terminal exits the network.
  • the anchor gateway sends an MBS service exit request to the relevant MBS server according to the saved MBS service information of the terminal, and requests to exit the MBS. business.
  • the MBS server modifies the context of the terminal and/or the context of the MBS service, and stops the MBS charging of the terminal, and notifies the network-side key management entity to stop performing MBS on the terminal. Key update. Therefore, when the terminal is shut down unexpectedly, the terminal can normally exit the MBS service and stop charging for the service.
  • a ninth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network.
  • the terminal in this embodiment is an active state terminal.
  • the target or source ASN acts as a proxy, instead of the terminal, initiates the exit of the MBS service, as shown in FIG.
  • step 1001 the terminal switches from the source ASN to the target ASN through the handover procedure, and removes the MBS domain that is receiving the MBS service.
  • step 1002 after the source ASN finds that the terminal handover is completed, according to the saved MBS service information of the terminal and the information of the target ASN obtained in the handover process, if the MBS service that is being received by the terminal is found, the target ASN is found. If the source ASN does not belong to the same MBS domain, that is, when the terminal moves out of the original MBS domain, it sends an MBS service exit request to the relevant MBS server to request to exit the MBS service.
  • step 1002' after the target ASN finds that the terminal handover is completed, according to the obtained If the MBS service information of the terminal and the source ASN information obtained during the handover process are found, the target ASN and the source ASN do not belong to the same MBS domain, and the terminal is found to have moved out of the original MBS. In the case of a domain, an MBS service exit request is sent to the relevant MBS server to request to exit the MBS service.
  • the MBS server modifies the context of the terminal and/or the context of the MBS service, and stops the MBS charging of the terminal, and notifies the network-side key management entity to stop performing MBS on the terminal. Key update. Therefore, when the terminal is shut down unexpectedly, the terminal can normally exit the MBS service and stop charging for the service.
  • the anchor ASN can also initiate the exit MBS service by the proxy terminal, and the process is consistent with the foregoing.
  • the communication between the ASN and the MBS server may be through a policy control entity, which is similar to the third embodiment, and is not mentioned here.
  • the ASN includes a gateway and a base station.
  • the ASN below has the same meaning as here and will not be mentioned.
  • the related network elements involved in the foregoing embodiments are a base station, a gateway, a paging controller, a policy control entity, and an MBS server, but in actual applications, there may also be an MBS proxy (MBS Proxy) or The specific operations of the other gateways are similar to those of the base station or the gateway, and are not described here.
  • MBS Proxy MBS proxy
  • a tenth embodiment of the present invention relates to a multicast broadcast system including at least one MBS server for providing an MBS service, and a bearer network connecting the MBS server and the terminal, the MBS server also being used to exit at the receiving terminal
  • the network side key management entity is instructed to stop performing the MBS key update for the terminal.
  • the bearer network includes a service gateway, an anchor gateway, an anchor PC, and a base station.
  • the anchor gateway further includes one of the following or any combination thereof: after discovering that the terminal needs to exit the MBS, for example, when determining that the terminal exits the network, notifying the MBS server or the serving gateway of the terminal that the terminal exits the MBS unit; and/or After receiving the notification that the terminal exits the MBS, the unit of the terminal context is modified.
  • the service gateway further includes one of the following units or any combination thereof: after receiving the notification that the active terminal terminates the MBS, notifying the MBS server that the terminal exits the MBS unit; after the terminal exits the MBS, modifying the context of the terminal and/or The unit of the context corresponding to the MBS service; after the terminal exits the MBS, the anchor gateway is notified to modify the unit of the context of the terminal; after the terminal exits the MBS, the base station where the terminal is located is notified that the terminal exits the unit of the MBS.
  • the policy function entity further includes one of the following units or any combination thereof: after receiving the notification that the active terminal terminates the MBS, notifying the MBS server that the terminal exits the MBS unit; after the terminal exits the MBS, notifying the anchor gateway to modify The unit of context of the terminal.
  • the base station further includes one of the following units or any combination thereof: after the terminal exits the notification of the MBS, the unit of the user context and/or the unit of the MBS service context are modified; after receiving the notification that the terminal exits the MBS, the corresponding MBS is modified. a unit for counting the user; a determining unit that determines whether the modified user count satisfies a predetermined condition, triggering a first unit of the adjustment process of the MBS bearer; and when the determining unit determines that the modified user count satisfies a predetermined condition, the first unit triggers the The adjustment process of the MBS bearer.
  • the anchor PC further includes one of the following units or any combination thereof: when the idle state terminal needs to exit the MBS, if it is determined that the idle state terminal exits the network, the MBS server corresponding to the MBS service initiates a request for the terminal to exit the MBS.
  • the unit after receiving the notification that the terminal exits the MBS, modifying the unit of the terminal context; after receiving the notification that the terminal exits the MBS, notifying the anchor gateway of the terminal to modify the unit of the terminal context.
  • the terminal can exit the MBS service normally, whether it is in the active state or in the idle state, whether the terminal actively wants to stop the MBS service or is unexpectedly shut down due to external reasons. Billing for this service.
  • each unit mentioned above is a logical unit, and may be implemented in the same physical unit in actual application, or may be implemented in multiple physical units.
  • the MBS server when the MBS server receives the exit MBS service request from the terminal, or the network side actively requests the terminal to exit the MBS service condition, the MBS server may have the following actions to ensure that the subsequent terminal cannot receive the MBS service:
  • the MBS Authorization Key (MAK) key management entity can be notified, and the terminal is deleted from the list maintained by the terminal to ensure that the subsequent MAK key is not updated.
  • the terminal is to be updated; at the same time, the key management entity may be triggered to initiate a key update process;
  • the group key encryption key (GKEK) key management entity can be notified, and the terminal is deleted from the list maintained by the terminal to ensure that the subsequent MAK key is not updated when the terminal is updated. Updating; at the same time, the key management entity may be triggered to initiate a key update process; 3) the MBS Group Traffic Encryption Key (MGTEK) key management entity may be notified, and the terminal is The maintenance list is deleted to ensure that the terminal is not updated when the subsequent MAK key is updated. At the same time, the key management entity may be triggered to initiate the key update process.
  • GKEK group key encryption key
  • the MBS server after receiving the request for the terminal to withdraw from the MBS or the condition for terminating the service provided by the terminal, modifies the context of the terminal and/or the context of the related MBS service, and stops the MBS service.
  • the billing is performed, and the network side key management entity stops the key update for the terminal, so that the terminal can normally exit the MBS service and stop charging the MBS service when actively initiating the request or passively stopping receiving the MBS service.
  • the MBS server directly notifies the service gateway, or indirectly informs the service gateway of the exit information through the anchor gateway, prompting the service gateway to receive the terminal to exit the MBS.
  • the base station modifies the user context and/or modifies the MBS service context, and modifies the user count of the corresponding MBS. And triggering the adjustment process of the MBS bearer according to the user count.
  • the adjustment process includes one or any combination of the following:
  • the base station carries the MBS. Adjusted to PTP by PTM, thereby reducing the consumption of service resources and improving the utilization of resources;
  • the modified user count is 0, it indicates that the active terminal does not use the MBS, and the exact statistics of the number of MBS users are triggered. It is detected whether there is still an idle state terminal using the MBS, and if the number of users accurately counted is also 0.
  • the base station notifies its serving gateway to stop distributing data to the base station, and can simultaneously remove the MBS bearer between the base station and its serving gateway and release the air interface resource corresponding to the MBS, so as to avoid resources being vacant and forming a waste of resources; If the MBS is carried in the PTP mode, the base station does not need to wait for all the users to exit the MBS, and the air interface resources corresponding to the terminal can be released first, so that the resources can be recycled in time to improve the utilization of resources;
  • the service gateway needs to initiate a deregistration process to the MBS server, informing it to stop distributing the service data to the gateway, and also releasing the idle resources, thereby avoiding the waste of resource vacancy.
  • the request to exit the MBS service may be sent to the MBS server indirectly through the anchor gateway according to the characteristics of the WiMAX network, or indirectly sent to the MBS server through the base station and the service gateway, and the flexibility is high.
  • the MBS server triggers the terminal to exit the corresponding MBS service according to the condition for terminating the service for the terminal, the terminal information and the corresponding MBS information are first notified to the serving gateway, and the MBS server updates after receiving the notification or receiving the response message from the gateway.
  • the context information of the terminal and the service context terminate the service for the terminal.
  • the terminal paging controller (Paging Controller, referred to as "PC") initiates a request for the terminal to exit the MBS to the MBS server corresponding to the MBS service, and the terminal can update the location through the shutdown.
  • the triggering PC sends a request to log out of the MBS service, and the terminal may request the MBS service to exit from the anchor PC through the base station.
  • the anchor PC initiates an MBS service exit request to the corresponding MBS server according to the request.
  • the terminal can normally exit the MBS service and stop charging the service regardless of whether the terminal wants to stop the MBS service or the unexpected shutdown due to external reasons.
  • the anchor gateway of the terminal may initiate a request for the terminal to exit the MBS to the MBS server corresponding to the MBS service.
  • the anchoring gateway receives a message from the serving gateway or the serving base station to instruct the user to quit the network.
  • the idle state terminal whether the active network is disconnected, the passive network is disconnected, or the network is unexpectedly retired, after the anchor PC processes the network retreating process, , will notify the anchor gateway user to quit the network.
  • the anchor gateway initiates an MBS service exit request to the corresponding MBS server according to the MBS service information in the terminal context maintained by it.
  • the terminal can normally exit the MBS service and stop charging for the service in any network exit scenario.
  • the base station releases the bearer of the MBS, and notifies the serving gateway to which the base station belongs to modify the saved MBS user list. If all the base stations under the serving gateway release the bearer of the MBS, the serving gateway requests the MBS server to register the MBS. Release the appropriate resources. By timely detecting the business requirements, the relevant resources are released in time when there is no service demand, so that the MBS service resources can be fully utilized and the resource utilization rate is improved.
  • an embodiment of the present invention further provides a multicast broadcast device, a receiving determining unit, and an indication processing unit, where the receiving determining unit includes: a receiving subunit and/or a determining subunit.
  • the receiving subunit configured to receive a request for the terminal to exit the MBS; the determining subunit, configured to determine whether the condition for terminating the service provided by the terminal is satisfied; the indication processing unit, configured to: according to the received When the terminal exits the MBS request or terminates the condition for providing the service to the terminal, the network side key management entity is instructed to stop performing the MBS key update for the terminal.
  • the multicast broadcast device further includes:
  • Modifying the charging unit configured to modify the context of the terminal and/or the context corresponding to the MBS service after the MBS server receives the request for the terminal to withdraw the MBS or terminate the service for the terminal, and stops The MBS billing of the terminal.
  • the multicast broadcast device further includes:
  • a notification unit configured to notify the functional entity that provides the MBS service for the terminal after the terminal exits the MBS, and the terminal has exited the MBS.
  • the multicast broadcast device further includes:
  • the initiating unit is configured to, when determining that the terminal needs to exit the MBS, initiate a request for the terminal to exit the MBS to a function entity that provides an MBS service for the terminal.
  • the functional entity providing the MBS service for the terminal may include: a base station, a serving gateway, an anchor gateway, an anchor paging controller, and/or a policy function entity.

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Abstract

A method, multicast-broadcast device and system for a terminal terminating multicast-broadcast service are disclosed. The terminal of WiMAX network can terminate normally MBS service. When MBS server receives the terminal termination request or when condition for terminating service provided for the terminal is satisfied, MBS server modifies context of the terminal, stops accounting and notifies network side key management entity to terminate key update for the terminal. If the terminal is active, after MBS server confirms that the terminal terminates MBS service, MBS server or anchor gateway notifies service gateway the termination information. Service gateway notifies a base station serving the terminal to modify user count corresponding to MBS and triggers bearer regulation procedure when user count satisfies preset condition. If the base station bears MBS service by PTP mode, after the terminal terminates MBS service, the base station releases resource corresponding to the terminal MBS.

Description

终端退出多播广播业务的方法、 多播广播设备及***  Method for terminal to exit multicast broadcast service, multicast broadcast device and system
本申请要求于 2006年 9月 20日、 2006年 9月 26日、 2007年 2月 2曰提 交中 国专利局、 申请号分别为 200610159446.4 、 200610127082.1 、 200710004847.7、 发明名称分别为"终端退出多播广播业务的方法及多播广播 ***"、 "通信***中删除 /修改组播广播业务的方法"、 "终端退出多播广播业 务的方法及多播广播***"的中国专利申请的优先权，其全部内容通过引用结 合在本申请中。  This application is required to be submitted to the China Patent Office on September 20, 2006, September 26, 2006, and February 2, 2007. The application numbers are 200610159446.4, 200610127082.1, 200710004847.7, respectively. The invention name is "Terminal Exit Multicast Broadcasting Service". Priority of the method and the multicast broadcast system", "the method of deleting/modifying the multicast broadcast service in the communication system", "the method of the terminal exiting the multicast broadcast service, and the multicast broadcast system", the entire contents of the Chinese patent application This is incorporated herein by reference.
技术领域 Technical field
本发明涉及无线通信领域，特别涉及一种微波接入全球互通网络中终端退 出多播广播业务的方法、 多播广播设备及***。  The present invention relates to the field of wireless communications, and in particular, to a method, a multicast broadcast device, and a system for a terminal to exit a multicast broadcast service in a global access network.
背景技术 Background technique
随着通信技术的发展和用户需求的增长，数据业务得到了迅速发展，数据 业务量的迅速增长使得人们对通信带宽的需求日益高涨，宽带接入正在向产业 界展现出一个巨大的市场。 为突破接入网的带宽瓶颈，人们推出了多种宽带接 入技术。  With the development of communication technology and the growth of user demand, data services have developed rapidly. The rapid growth of data traffic has led to an increasing demand for communication bandwidth. Broadband access is showing a huge market to the industry. In order to break through the bandwidth bottleneck of the access network, various broadband access technologies have been introduced.
Engineers, 简称" IEEE" )于 2001年 12月颁布的， 用于在城域网中提供最后一 公里无线宽带接入的标准。 IEEE802.16标准主要包含 802.16a、 802.16RevD与 802.16e三个标准。 Engineers, referred to as "IEEE", was issued in December 2001 to provide the last mile of wireless broadband access in metropolitan area networks. The IEEE 802.16 standard mainly includes three standards of 802.16a, 802.16 RevD and 802.16e.
微波接入全球互通 ( Worldwide Interoperability for Microwave Access, 简 称" WiMAX" )是目前业界对基于 IEEE 802.16 系列标准的无线城域网接入技 术，其基本目标是提供一种在城域网一点对多点的多厂商环境下，可有效互操 作的宽带无线接入手段。  Worldwide Interoperability for Microwave Access (WiMAX) is the industry's wireless metropolitan area network access technology based on the IEEE 802.16 series of standards. Its basic goal is to provide a point-to-multipoint network in the metropolitan area network. In a multi-vendor environment, broadband wireless access means can be effectively interoperable.
具体地说， 802.16系列标准规定了 WiMAX***的空中接口部分协议层， 主要包括物理层（PHY ), 以及媒体接入控制 （Medium Access Control, 简称 "MAC" )层。 其中， PHY层在物理上完成对信号的调制解调以及编解码等操 作， 而 MAC层主要完成 WiMAX***的媒体接入控制功能。  Specifically, the 802.16 series of standards specifies the protocol layer of the air interface part of the WiMAX system, including the physical layer (PHY) and the Medium Access Control (MAC) layer. The PHY layer physically performs modulation, demodulation, and codec operations on the signal, and the MAC layer mainly implements the media access control function of the WiMAX system.
图 1示出 WiMAX端到端参考模型。 其中 R1接口为无线空中接口， 主要 由 IEEE802.16d/e定义。 其余接口均为有线接口。 如图可见， WiMAX主要包含移动台 （Mobile Station, 简称" MS" ) /用户 站（ Subscribe Station, 简称" SS" )、 接入服务网络（ Access Service Network, 简称" ASN" ) 与连接服务网络（Connectivity Service Network, 简称" CSN" )。 Figure 1 shows the WiMAX end-to-end reference model. The R1 interface is a wireless air interface and is mainly defined by IEEE802.16d/e. The remaining interfaces are all wired interfaces. As can be seen, WiMAX mainly includes a mobile station (Mobile Station, referred to as "MS") / Subscriber Station ("Snack Station"), an Access Service Network ("ASN") and a connection service network ( Connectivity Service Network, referred to as "CSN").
ASN定义为 WiMAX用户终端提供无线接入服务的网络功能集合， ASN 包含基站 BS和 ASN网关（ ASN GateWay 简称" ASN-GW" ) 网元， 一个 ASN 可能被多个 CSN共享。  The ASN is defined as a set of network functions for providing WiMAX user terminals with radio access services. The ASN includes a base station BS and an ASN gateway (ASN GateWay abbreviation "ASN-GW") network element, and an ASN may be shared by multiple CSNs.
ASN的主要功能包含 BS的功能和 ASN- GW的功能。 其中， BS的功能 有： 提供 BS和用户站 SS/ MS的 L2连接、 无线资源管理、 测量与功率控制和 空口数据的压缩与加密。 ASN-GW的功能有： 为 SS/MS认证、 授权和计费功 能提供代理 ( proxy )功能； 支持网络服务提供商 ( Network Service Provider , 简称 "NSP" ) 的网络发现和选择； 为 SS提供 L3信息的中继 （Relay )功能， 如 IP地址分配。  The main functions of the ASN include the functions of the BS and the functions of the ASN-GW. Among them, the functions of the BS are: providing L2 connection of BS and user station SS/MS, radio resource management, measurement and power control, and compression and encryption of air interface data. The functions of ASN-GW include: providing proxy function for SS/MS authentication, authorization and accounting functions; supporting network discovery and selection of Network Service Provider (NSP); providing L3 for SS Relay function of information, such as IP address allocation.
CSN定义为 WiMAX用户终端提供 IP连接服务。 CSN主要提供如下功能： SS/MS的 IP地址分配， Internet接入， 验证、授权、 计费协议（ Authentication Authorization, Account, 简称" AAA" )代理（ proxy )或者服务（ server )， 基 于用户的授权控制， ASN到 CSN的隧道， WiMAX用户的计费以及运营商之 间的结算， 漫游情况下 CSN之间的隧道， ASN之间的切换， 和各种 WiMAX 服务（如基于位置的业务、 多媒体多播和广播业务、 IP多媒体子***业务）。  The CSN is defined to provide IP connection services for WiMAX user terminals. The CSN mainly provides the following functions: IP address allocation of SS/MS, Internet access, authentication, authorization, and accounting (Authorization Authorization, Account, AAA) proxy or server, user-based authorization. Control, ASN to CSN tunneling, WiMAX subscriber billing and inter-operator billing, tunneling between CSNs, ASN switching, and various WiMAX services (eg location-based services, multimedia) Broadcast and broadcast services, IP multimedia subsystem services).
MS/SS为 （移动 )终端， 用户使用该终端接入 WiMAX网络。  The MS/SS is a (mobile) terminal, and the user uses the terminal to access the WiMAX network.
以上对 WiMAX及其网络构架进行了说明，下面对多播广播业^ ( Multicast The above describes WiMAX and its network architecture. The following is for the multicast broadcast industry ^ ( Multicast
& Broadcast Service , 简称" MBS" )进行简单介绍。 & Broadcast Service, referred to as "MBS" for a brief introduction.
随着 Internet (因特网 ) 的迅猛发展， 人们对移动通信的需求已不再满足 于电话和消息业务， 大量多媒体业务涌现出来，其中一些应用业务要求多个用 户能同时接收相同数据， 如视频点播、 电视广播、 视频^义、 网上教育、 互动 游戏等。目前在有线网络上可以采用网间互联协议（ Internet Protocol,简称" IP" ) 组播和广播技术来实现，但是将这些业务移植到移动网上，与一般的数据相比， 由于这些业务具有数据量大、持续时间长、 时延敏感等特点， 并且移动网具有 特定的网络结构、 功能实体和无线接口等， 现有 IP组播和广播技术并不能直 接适用于移动网。 为了有效地利用移动网络资源， WiMAX定义了 MBS业务， MBS业务是 在移动网络中提供一个数据源向多个用户发送数据的点到多点业务，实现网络 资源共享， 提高网络资源的利用率， 尤其是空口接口资源。 WiMAX定义的 MBS 不仅能实现纯文本低速率的消息类组播和广播， 而且还能实现高速多媒 体业务的组播和广播， 这无疑顺应了未来移动数据发展的趋势。 With the rapid development of the Internet (Internet), people's demand for mobile communication is no longer satisfied with telephone and messaging services, and a large number of multimedia services emerge. Some of these applications require multiple users to receive the same data at the same time, such as video on demand. TV broadcasting, video ^ Yi, online education, interactive games, etc. Currently, it can be implemented on the wired network by using the Internet Protocol (IP) multicast and broadcast technology, but these services are transplanted to the mobile network, compared with the general data, because these services have data volume. Large, long-lasting, and time-sensitive, and the mobile network has a specific network structure, functional entities and wireless interfaces. Existing IP multicast and broadcast technologies cannot be directly applied to mobile networks. In order to effectively utilize mobile network resources, WiMAX defines the MBS service, which is a point-to-multipoint service that provides a data source to send data to multiple users in a mobile network, realizes network resource sharing, and improves utilization of network resources. Especially the air interface resources. The MBS defined by WiMAX can not only realize plain-text low-rate message-like multicast and broadcast, but also realize multicast and broadcast of high-speed multimedia services, which undoubtedly conforms to the trend of future mobile data development.
在 WiMAX网络中，通过业务流标识（ Service Flow Identifier,简称" SFID" ), 来标识不同的单向业务流， 通过 CID来标识不同的连接， 所有的业务流在空 口通过媒体访问控制（Medium Access Control, 简称" MAC" )层的连接进行传 送， 通过在业务流的 SFID与 MAC层连接的 CID之间进行映射， 将业务流在 对应的连接上传输。 基于 WiMAX网络 MBS业务在上述标识的基础上， 还通 过组播连接标识（ Multicast CID )专门标识组播连接，通过组播内容标识（ MBS Contents ID )来标识一个组播业务， 一个 Mulicast CID上传输的协议数据单元 ( Protocol Data Unit, 简称" PDU" ) 可以包含一个或多个 MBS业务。  In a WiMAX network, a service flow identifier ("SFID") is used to identify different one-way service flows, and CIDs are used to identify different connections. All service flows are controlled by media access in the air interface (Medium Access). The connection of the Control, abbreviated as "MAC" layer, is transmitted, and the traffic is transmitted on the corresponding connection by mapping between the SFID of the service flow and the CID connected to the MAC layer. Based on the above identification, the MBS service based on the WiMAX network also identifies the multicast connection through the multicast connection identifier (Multicast CID), and identifies a multicast service through the MBS Contents ID, which is transmitted on a Mulicast CID. A Protocol Data Unit ("PDU") may contain one or more MBS services.
在 MBS业务中， 某些全球定义的服务流可以携带到多个终端的广播或多 播信息， 这些服务流包含服务质量（Quality of Service, 简称" QoS" )参数， 为 了提高业务的安全性， 可以用全球定义的数据加密密钥对其进行加密。  In the MBS service, some globally defined service flows may carry broadcast or multicast information to multiple terminals. These service flows include Quality of Service (QoS) parameters. To improve service security, It can be encrypted with a globally defined data encryption key.
基于 WiMAX网络的 MBS业务支持两种接入模式： 单基站接入和多基站 接入。 在多基站接入模式下， 一个 MBS域（即 MBS Zone, 用 MBS— zone ID 来标识）内的所有基站用相同的 Multicast CID和 MBS组安全联盟（ MBS Group Security Association, 简称" MBS GSA" ), 发送同一 MBS业务流的内容， 注册 MBS服务的终端可以在该 MBS域内通过多个基站接收 MBS业务数据， 并且 处于空闲态的终端在 MBS区内跨基站移动时， 不需重建连接， 可以不受影响 的接收 MBS业务， 实现 MBS业务的无缝切换。  The MBS service based on WiMAX network supports two access modes: single base station access and multiple base station access. In the multi-base station access mode, all base stations in an MBS domain (ie, MBS Zone, identified by MBS_zone ID) use the same Multicast CID and MBS Group Security Association (MBS Group Security Association, referred to as "MBS GSA"). The content of the same MBS service stream is sent, and the terminal that registers the MBS service can receive the MBS service data through multiple base stations in the MBS domain, and the terminal in the idle state does not need to re-establish the connection when moving across the base station in the MBS zone, or Affected receiving MBS services, seamlessly switching MBS services.
在现有技术中， 可以通过" DSA-REQ"/"DS A-RSP"来建立 MBS连接链接 , 和告诉终端 MBS域所播的 MBS内容标识以指示终端接收 MBS业务数据。 另 外还规定了终端在移动时， 如何实现 MBS业务的无缝切换， 如对于多基站接 入模式下的 MBS业务， 终端除了可以在该 MBS域内通过多个基站接收 MBS 业务数据外， 对于处于空闲态下的终端， 在 MBS域内进行跨基站移动时， 无 需重入网以及重建 MBS业务连接，可以不受影响的接收 MBS业务，实现 MBS 业务的无缝切换。 In the prior art, an MBS connection link can be established by "DSA-REQ" / "DS A-RSP", and the MBS content identifier broadcast by the terminal MBS domain is notified to instruct the terminal to receive MBS service data. In addition, how to implement seamless handover of the MBS service when the terminal is moving, for example, for the MBS service in the multi-base station access mode, the terminal can receive the MBS service data through multiple base stations in the MBS domain, The terminal in the state, when performing cross-base station mobility in the MBS domain, does not need to re-enter the network and re-establish the MBS service connection, and can receive the MBS service without being affected, and realize the MBS. Seamless switching of business.
然而现有技术中并没有涉及离开 MBS业务时需要进行的相关处理。 也就 是说， 当终端不想接收 MBS业务（如用户不想再接收该 MBS业务， 或终端 切换到不支持其订阅的 MBS业务的小区时）或 MBS业务结束时， 终端不能 退出相关的 MBS业务。  However, the prior art does not involve related processing that needs to be performed when leaving the MBS service. That is to say, when the terminal does not want to receive the MBS service (for example, when the user does not want to receive the MBS service again, or when the terminal switches to the cell that does not support the MBS service that is subscribed to it) or the MBS service ends, the terminal cannot exit the related MBS service.
发明内容 Summary of the invention
有鉴于此， 本发明提供一种终端退出多播广播业务的方法、 设备及***， 使得 WiMAX网络中终端可以正常退出 MBS业务。  In view of this, the present invention provides a method, device, and system for a terminal to exit a multicast broadcast service, so that a terminal in a WiMAX network can normally exit the MBS service.
为实现上述目的，本发明提供了一种微波接入全球互通网络中终端退出多 播广播业务的方法， 包括步骤：  To achieve the above objective, the present invention provides a method for a terminal to exit a multicast broadcast service in a microwave access global interworking network, including the steps of:
多播广播业务 MBS服务器收到终端退出 MBS的请求或终止为终端提供 服务的条件满足后， 指示网络侧密钥管理实体停止为该终端进行 MBS的密钥 更新。  Multicast Broadcast Service After receiving the request for the terminal to withdraw from the MBS or the condition for terminating the service provided to the terminal, the MBS server instructs the network side key management entity to stop performing the MBS key update for the terminal.
本发明还提供了一种多播广播***， 包括至少一个用于提供 MBS服务的 MBS服务器， 以及连接所述 MBS服务器和终端的承载网络， 所述 MBS服务 器还用于在收到终端退出 MBS的请求或终止为终端提供服务的条件满足后， 指示网络侧密钥管理实体停止为该终端进行 MBS的密钥更新。 本发明再提供 一种多播广播设备， 包括： 接收判断单元和指示处理单元， 所述接收判断单元 包括： 接收子单元和 /或判断子单元， 其中  The present invention also provides a multicast broadcast system, including at least one MBS server for providing an MBS service, and a bearer network connecting the MBS server and the terminal, the MBS server is further configured to exit the MBS at the receiving terminal. After the condition for requesting or terminating the service for the terminal is satisfied, the network side key management entity is instructed to stop performing the key update of the MBS for the terminal. The present invention further provides a multicast broadcast device, comprising: a receiving determining unit and an indication processing unit, wherein the receiving determining unit comprises: a receiving subunit and/or a determining subunit, wherein
所述接收子单元， 用于接收终端退出 MBS的请求；  The receiving subunit is configured to receive a request for the terminal to withdraw from the MBS;
所述判断子单元， 用于判断终止为该终端提供服务的条件是否满足； 所述指示处理单元， 用于根据接收到的所述终端退出 MBS的请求， 或者 终止为该终端提供服务的条件满足时，指示网络侧密钥管理实体停止为该终端 进行 MBS的密钥更新。  The determining subunit is configured to determine whether the condition for terminating the service provided by the terminal is satisfied; the indication processing unit is configured to satisfy, according to the received request that the terminal exits the MBS, or terminate the service for providing the terminal When the network side key management entity is instructed to stop performing key update of the MBS for the terminal.
由公开的技术方案可知， 本发明在 MBS服务器收到终端退出 MBS的请 求或终止为终端提供服务的条件满足后， 将修改终端的上下文和 /或相关 MBS 业务的上下文， 停止 MBS业务计费， 并且网络侧密钥管理实体停止为该终端 进行密钥更新， 使得终端在主动发起请求或被动停止接收 MBS业务时， 均能 正常退出 MBS业务。 附图说明 According to the disclosed technical solution, the present invention will modify the context of the terminal and/or the context of the related MBS service after the MBS server receives the request for the terminal to withdraw from the MBS or terminate the service for providing the terminal, and stops the MBS service charging. And the network side key management entity stops the key update for the terminal, so that the terminal can normally exit the MBS service when actively initiating the request or passively stopping receiving the MBS service. DRAWINGS
图 1时现有技术中 WiMAX网络中端到端参考模型；  Figure 1 shows an end-to-end reference model in a prior art WiMAX network;
图 2是根据本发明第一实施方式的 WiMAX网络中终端退出 MBS的方法 流程图；  2 is a flow chart of a method for a terminal to exit an MBS in a WiMAX network according to a first embodiment of the present invention;
图 3是根据本发明第二实施方式的 WiMAX网络中终端退出 MBS的方法 流程图；  3 is a flow chart of a method for a terminal to exit an MBS in a WiMAX network according to a second embodiment of the present invention;
图 4根据本发明第三实施方式的终端退出组播广播业务的方法的实施例 流程图；  4 is a flowchart of an embodiment of a method for a terminal to exit a multicast broadcast service according to a third embodiment of the present invention;
图 5是根据本发明第四实施方式的 WiMAX网络中终端退出 MBS的方法 流程图；  5 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to a fourth embodiment of the present invention;
图 6是根据本发明第五实施方式的 WiMAX网络中终端退出 MBS的方法 流程图；  6 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to a fifth embodiment of the present invention;
图 7根据本发明第六实施方式的网络侧删除终端侧 MBS业务的流程图； 图 8是根据本发明第七实施方式的 WiMAX网络中终端退出 MBS的方法 流程图；  7 is a flowchart of deleting a terminal side MBS service on the network side according to a sixth embodiment of the present invention; FIG. 8 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to a seventh embodiment of the present invention;
图 9是根据本发明第八实施方式的 WiMAX网络中终端退出 MBS的方法 流程图；  9 is a flowchart of a method for a terminal to exit an MBS in a WiMAX network according to an eighth embodiment of the present invention;
图 10是本发明第九实施方式的 WiMAX网络中终端退出 MBS的方法的 流程图。  Figure 10 is a flow chart showing a method of a terminal exiting an MBS in a WiMAX network according to a ninth embodiment of the present invention.
具体实施方式 detailed description
为使本发明的目的、技术方案和优点更加清楚， 下面将结合附图对本发明 作进一步地详细描述。  In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings.
MBS服务器收到终端退出 MBS的请求或终止为终端提供服务的条件满足 后， 将修改终端的上下文， 停止 MBS业务计费以及停止为该终端进行密钥更 新， 使得终端在主动发起请求或被动停止接收 MBS 业务时， 均能正常退出 MBS业务， 停止该 MBS业务的计费。  After receiving the request for the terminal to exit the MBS or the condition for terminating the service provided by the terminal, the MBS server will modify the context of the terminal, stop the MBS service charging, and stop the key update for the terminal, so that the terminal actively initiates the request or passively stops. When receiving the MBS service, the MBS service can be normally quit, and the charging of the MBS service is stopped.
终端退出 MBS业务， 有以下几种可能：  The terminal exits the MBS service and has the following possibilities:
1. 终端主动退出 MBS: 可能由于激活态下， 用户不再希望接收该 MBS, 从而引发退出流程，该退出流程可以由激活态下的终端主动发起； 也可能由于 终端移动出原来接收业务的 MBS域， 从而引发终端退出该 MBS, 此时， 该退 出流程可由网络侧代理终端发起； 也可能是激活态下终端在关机之前，发起退 出 MBS流程； 等等。 1. The terminal actively quits the MBS: The user may no longer wish to receive the MBS due to the activation state, which may trigger the exit process. The exit process may be initiated by the terminal in the active state. The terminal moves out of the MBS domain that originally received the service, thereby causing the terminal to exit the MBS. At this time, the exit process may be initiated by the network side proxy terminal; or the terminal may initiate the exit MBS process before the shutdown in the active state;
2. MBS服务器要求用户退出 MBS:可能由于预付费用户余额不足；等等。 3. 网络设备， 如锚点寻呼控制器（Paging Controller, 简称" PC" ); 代理终 端发起退出 MBS业务：可能由于空闲态终端关机，锚点 PC代理该终端向 MBS 服务器发起业务去激活； 或由于终端跨 MBS 域移动， 作为优化方案， 基站 / 网关 /锚点 PC可以代理终端向 MBS服务器发起业务去激活； 或由于终端异常 退网， 锚点网关 /锚点 PC代理该终端向 MBS服务器发起业务去激活； 等等。  2. The MBS server requires the user to quit MBS: possibly due to insufficient prepaid user balance; and so on. 3. The network device, such as the Paging Controller ("PC"); the proxy terminal initiates the exit of the MBS service: the anchor PC may initiate the service deactivation to the MBS server due to the shutdown of the idle state terminal; Or because the terminal moves across the MBS domain, as an optimization scheme, the base station/gateway/anchor PC can initiate a service deactivation to the MBS server by the proxy terminal; or because the terminal abnormally exits the network, the anchor gateway/anchor PC proxy the terminal to the MBS server. Initiate business deactivation; and so on.
下面根据发明原理对本发明第一实施方式进行说明。本发明第一实施方式 涉及 WiMAX网络中终端退出 MBS的方法， 具体如图 2所示。 本实施方式中 的终端是激活态的终端， 由终端的服务网关为终端提供相应的 MBS。  The first embodiment of the present invention will now be described in accordance with the principles of the invention. The first embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network, as shown in FIG. 2 . The terminal in this embodiment is an active terminal, and the serving gateway of the terminal provides the terminal with the corresponding MBS.
在终端希望退出 MBS时， 进入步骤 201中， 终端通过因特网组管理协议 ( Internet Group Management Protocol, 简称" IGMP" ) 向锚点网关发送离开 MBS的请求， 其中标明要退出的 MBS的多播组地址。  When the terminal wants to exit the MBS, the process proceeds to step 201, and the terminal sends a request to leave the MBS to the anchor gateway through an Internet Group Management Protocol (IGMP), where the multicast group address of the MBS to be logged out is indicated. .
接着进入步骤 202， 如果由锚点网关处理此消息， 则锚点网关收到该请求 后，将传递该请求的 IGMP数据交由控制面处理，控制面将其中包含的多播组 地址映射到具体的 MBS, 并通知该终端所在的服务网关该终端要退出某 MBS 业务， 所通知的消息内容包括： 终端 ID、 终端 NAI、 服务 ID、 内容标识、 IP 多播地址等内容。也可以将完整的 IGMP消息封装在上述消息中发送给服务网 关。  Then, proceeding to step 202, if the message is processed by the anchor gateway, after receiving the request, the anchor gateway forwards the IGMP data of the request to the control plane, and the control plane maps the multicast group address contained therein to the specific The MBS, and notify the service gateway where the terminal is located, the terminal wants to exit a certain MBS service, and the notified message content includes: terminal ID, terminal NAI, service ID, content identifier, IP multicast address, and the like. The complete IGMP message can also be encapsulated in the above message and sent to the service gateway.
在步骤 203， 在服务网关收到步骤 202发送的消息后， 或者如果由服务网 关处理步骤 201中的消息，在服务网关数据面识别该消息， 并交由控制面处理 后， 服务网关向对应的 MBS服务器发起 MBS业务退出请求， 其中标明请求 退出 MBS业务， 消息内容还包括： 终端 ID ( MSID )、 终端 NAI ( MS NAI )、 业务 ID ( Service ID )、 内容标识（ Content ID )、 IP多播地址、 离开标识（ Leave Indicator )等内容。也可以将完整的 IGMP消息封装在上述消息中发送给 MBS 服务器。 使得 MBS服务器能够根据该消息唯一确定需要退出 MBS的终端和 对应的 MBS。 接着进入步骤 204， MBS服务器收到该请求后，对消息内容的合法性进行 确认， 在确认合法后， 向月良务网关返回成功的响应消息， 并可以同时修改终端 的上下文和业务上下文， 以及停止该终端的 MBS计费， 并通知网络侧密钥管 理实体停止对该终端进行 MBS的密钥更新。 其中， 所述修改终端上下文是指 将该 MBS业务相关信息从终端上下文中删除； 修改业务上下文是指将该终端 相关信息从业务上下文中删除； 下文中所说的修改终端上下文、修改业务上下 文的含义均与此处相同， 之后将不再赞述。 In step 203, after the serving gateway receives the message sent in step 202, or if the message in step 201 is processed by the serving gateway, the message is identified on the service gateway data plane and processed by the control plane, the serving gateway is corresponding to The MBS server initiates an MBS service exit request, which indicates that the request to exit the MBS service, and the message content further includes: a terminal ID (MSID), a terminal NAI (MS NAI), a service ID (Service ID), a content identifier (Content ID), and an IP multicast. Address, Leave Indicator, etc. The complete IGMP message can also be encapsulated in the above message and sent to the MBS server. The MBS server is enabled to uniquely determine the terminal and the corresponding MBS that need to exit the MBS according to the message. Then, proceeding to step 204, after receiving the request, the MBS server confirms the validity of the content of the message, and after confirming the validity, returns a successful response message to the monthly service gateway, and can simultaneously modify the context and service context of the terminal, and The MBS charging of the terminal is stopped, and the network side key management entity is notified to stop the key update of the MBS for the terminal. The modifying the terminal context refers to deleting the MBS service related information from the terminal context; modifying the service context refers to deleting the terminal related information from the service context; and modifying the terminal context and modifying the service context as described below. The meanings are the same here, and will not be mentioned later.
接着进入步骤 205， 服务网关收到该成功的响应消息后， 借用 R6接口消 息， 如 RR REQ (资源预留请求） 消息向该终端的基站发送相应的 MBS退出 消息， 消息内容包含 MSID、 该 MBS业务对应的服务流标识以及退出业务指 示等信息。  Then, proceeding to step 205, after receiving the successful response message, the serving gateway borrows an R6 interface message, such as an RR REQ (Resource Reservation Request) message, to send a corresponding MBS exit message to the base station of the terminal, where the message content includes the MSID, the MBS. Information such as the service flow identifier corresponding to the service and the exit service indication.
接着进入步骤 206 ,该基站收到该消息后，借用 R1接口消息，如 DSD REQ (动态服务删除请求） 消息通知对应终端完成退出 MBS流程， 消息内容包含 MSID、 该 MBS业务对应的服务流标识以及退出业务指示等信息。  Then, in step 206, after receiving the message, the base station borrows an R1 interface message, such as a DSD REQ (Dynamic Service Delete Request) message, to notify the corresponding terminal to complete the exit MBS process, and the message content includes the MSID, the service flow identifier corresponding to the MBS service, and Exit the business instructions and other information.
接着进入步骤 207， 终端收到该消息后， 向基站返回对应的消息， 如 DSD Then, proceeding to step 207, after receiving the message, the terminal returns a corresponding message, such as DSD, to the base station.
RSP消息。 如果该基站通过点到点 （Point to point简称 "PTP" )模式承载该 MBS业务， 则在 DSD过程中释放该终端 MBS对应的空口资源， 避免空口资 源被空置， 造成资源浪费； 如果该基站通过点到多点 （Point to multi point , 简称 "ΡΤΜ" )模式承载该 MBS业务， 则 DSD过程只起通告的作用 , 由终端 自行释放其资源。 RSP message. If the base station carries the MBS service in a point-to-point (PTP) mode, the air interface resource corresponding to the terminal MBS is released in the DSD process to prevent the air interface resource from being vacant, causing waste of resources; The point-to-multipoint ("ΡΤΜ") mode carries the MBS service, and the DSD process only acts as a notification, and the terminal releases its resources by itself.
接着进入步骤 208， 基站接着向服务网关返回相应的退出应答， 通知服务 网关终端侧已成功完成 MBS的退出。  Next, proceeding to step 208, the base station then returns a corresponding exit response to the serving gateway to notify the service gateway terminal side that the MBS exit has been successfully completed.
接着进入步骤 209， 服务网关收到消息后， 继而向 MBS服务器发送 MBS 退出确认。  Next, proceeding to step 209, after receiving the message, the service gateway then sends an MBS exit confirmation to the MBS server.
接着进入步骤 210， MBS服务器收到该确认消息后，向服务网关返回成功 应答 ACK, 表明已经知道该终端成功退出 MBS, 进而修改终端的上下文和业 务上下文， 停止该终端的 MBS计费并通知网络侧密钥管理实体停止对该终端 进行 MBS的密钥更新。 通过停止为该终端更新 MBS业务的密钥， 使得 MBS 业务密钥改变时， 终端无法继续使用该 MBS业务， 通过这一方法确保终端在 停止计费后终止使用该 MBS。 Then, the process proceeds to step 210. After receiving the confirmation message, the MBS server returns a success response ACK to the service gateway, indicating that the terminal has successfully exited the MBS, and then modifying the context and service context of the terminal, stopping the MBS charging of the terminal, and notifying the network. The side key management entity stops the key update of the MBS for the terminal. By stopping the update of the key of the MBS service for the terminal, when the MBS service key is changed, the terminal cannot continue to use the MBS service, and the method ensures that the terminal is in the The MBS is terminated after the billing is stopped.
由于在 MBS服务器停止该终端的 MBS之前， 经过了多重信令交互， 从 而确保了终端退出 MBS的安全性。  Since the MBS server stops the MBS of the terminal, multiple signaling interactions are performed, thereby ensuring the security of the terminal exiting the MBS.
接着进入步骤 211，服务网关向基站返回相应的退出 ACK,通知基站 MBS 服务器已正式终止该终端使用 MBS并已停止了相应计费。  Next, proceeding to step 211, the serving gateway returns a corresponding exit ACK to the base station, notifying the base station that the MBS server has officially terminated the terminal using the MBS and has stopped the corresponding charging.
步骤 209至步骤 211为可选步骤，如果在步骤 204中已经进行了上下文修 订、 计费及密钥相关操作， 则步骤 209至步骤 211可以不必执行。  Steps 209 through 211 are optional steps. If context modification, charging, and key related operations have been performed in step 204, steps 209 through 211 may not be performed.
接着进入步骤 212， 服务网关在处理完用户退出 MBS的流程后， 通知锚 点网关修改该用户的上下文， 将已退出的 MBS业务相关信息删除。  Then, proceeding to step 212, after processing the process of the user exiting the MBS, the service gateway notifies the anchor gateway to modify the context of the user, and deletes the MBS service related information that has been exited.
基站在空***互完成后， 接着进入步骤 213， 基站修改终端上下文与该 After the air interface interaction is completed, the base station proceeds to step 213, where the base station modifies the terminal context and the
MBS业务上下文， 并同时修改该 MBS业务的用户计数， 将用户计数减少 1。 如果该 MBS是以 PTM模式承载且修改后的用户计数小于第一门限， 则触发 该 MBS用户数目的精确统计，如果精确统计的用户数目满足通过 PTP模式承 载该 MBS的条件， 则将该 MBS的承载模式从 PTM模式转换为 PTP模式； 如 果修改后的用户计数为 0， 则同样触发该 MBS用户数目的精确统计， 如果统 计出的用户数目依然为 0， 则进入步骤 214，基站向服务网关发起去注册流程， 通知服务网关不要再向该基站分发该 MBS业务数据， 也可以同时去除该基站 与服务网关之间该 MBS对应的承载并释放该 MBS对应的空口资源（包括 PTP 模式下的空口资源或 PTM模式下的空口资源）。 在本步骤中， MBS的用户计 数标识了使用该 MBS的激活态下的终端数目， 该数目可根据终端参与和退出 该 MBS的流程进行变更， 由于除了激活态终端外， 还可能存在空闲态的终端 使用该 MBS，而空闲态下使用该 MBS的终端数目无法通过用户计数明确标识， 因此在用户计数为 0时， 还需要进行 MBS业务用户数目的精确统计， 在确定 没有任何终端使用该 MBS业务时， 才释放相应的承载， 以确保终端在任何状 态下均能正常使用 MBS。 另外， 在步骤 213中， 如果此时该 MBS业务会话尚 未开始， 基站也可以暂时只修改该 MBS的用户数目， 在该 MBS开始时再根 据当前的用户数目选择触发用户数目统计的流程，以减少基站作无用功的可能 性。 The MBS business context, and simultaneously modify the user count of the MBS service, reduces the user count by one. If the MBS is carried in the PTM mode and the modified user count is less than the first threshold, the accurate statistics of the number of the MBS users are triggered. If the number of users accurately counted satisfies the condition for carrying the MBS in the PTP mode, the MBS is The bearer mode is switched from the PTM mode to the PTP mode. If the modified user count is 0, the exact statistics of the number of MBS users are also triggered. If the number of users counted is still 0, then the process proceeds to step 214 where the base station initiates to the serving gateway. The registration process is performed, and the service gateway is notified to not distribute the MBS service data to the base station, and the bearer corresponding to the MBS between the base station and the serving gateway may be removed at the same time, and the air interface resources corresponding to the MBS are released (including the air interface resources in the PTP mode). Or air interface resources in PTM mode). In this step, the user count of the MBS identifies the number of terminals in the active state using the MBS, and the number may be changed according to the process in which the terminal participates in and exits the MBS, because in addition to the active state terminal, there may be an idle state. The terminal uses the MBS, and the number of terminals using the MBS in the idle state cannot be clearly identified by the user count. Therefore, when the user count is 0, accurate statistics of the number of MBS service users are also required, and it is determined that no terminal uses the MBS service. At the same time, the corresponding bearer is released to ensure that the terminal can use MBS normally under any state. In addition, in step 213, if the MBS service session has not yet started, the base station may temporarily modify only the number of users of the MBS, and then select a process of triggering the number of users according to the current number of users to reduce the number of users. The possibility of the base station being useless.
如果在该基站通知服务网关不再需要其分发数据之后，该服务网关上没有 任何基站继续接收该 MBS业务， 则此时该服务网关也无需再接收该 MBS业 务， 接着进入步骤 215， 该服务网关向 MBS服务器发起去注册流程， 通知其 MBS服务器不要再向该服务网关分发该 MBS业务数据，也可以同时释放承载， 释放承载的方式可以是拆除该 MBS对应的隧道或者是离开该 MBS的多播组， 从而将可用资源供其他需要的业务使用。 If the base station notifies the service gateway that it no longer needs to distribute data, there is no service gateway. If any of the base stations continues to receive the MBS service, the service gateway does not need to receive the MBS service again, and then proceeds to step 215, the service gateway initiates a deregistration process to the MBS server, notifying the MBS server not to distribute the service to the service gateway. The MBS service data may also release the bearer at the same time. The manner of releasing the bearer may be to remove the tunnel corresponding to the MBS or the multicast group leaving the MBS, so as to use the available resources for other required services.
在本实施方式中， 如果为该终端提供该 MBS的是终端的锚点网关， 则由 锚点网关代替服务网关进行相关的信令传输和操作。  In this embodiment, if the terminal is provided with the anchor gateway of the terminal, the anchor gateway replaces the serving gateway to perform related signaling transmission and operation.
需要说明的是， 在服务网关与 MBS服务器之间可能存在 MBS代理功能 实体， 该 MBS代理功能实体用于处理 MBS业务， 可以集成在 ASN内的控制 实体中。 所述 MBS代理功能实体包括信令面功能以及数据面功能； 其中， 所 述信令面功能主要负责在 ASN实体与 MBS服务器之间做信令转发以及控制 MBS在 ASN内的资源；所述数据面功能主要负责接收来自 MBS服务器的 MBS 业务数据并分发到承载该 MBS的各个网关。 此 MBS代理可应用于下述各实 施例， 下文中将不再赞述。  It should be noted that there may be an MBS proxy function entity between the service gateway and the MBS server, and the MBS proxy function entity is used to process the MBS service and may be integrated in the control entity in the ASN. The MBS proxy function entity includes a signaling plane function and a data plane function; wherein the signaling plane function is mainly responsible for signaling forwarding between the ASN entity and the MBS server and controlling resources of the MBS in the ASN; The face function is mainly responsible for receiving MBS service data from the MBS server and distributing it to each gateway that carries the MBS. This MBS agent can be applied to the following embodiments, which will not be discussed below.
需要说明的是， 本实施例中的 IGMP 消息只是应用层信令的一种表现形 式， 终端可以通过任何形式的应用层信令直接与 MBS服务器交互 （WiMAX 承载网络只作为承载， 对信令内容不感知）， MBS服务器可以在与该终端交互 退出 MBS业务的信令后， 可以只指示密钥管理实体停止为该终端更新密钥， 同时停止对该用户的计费。 如果进一步需要承载网络感知， 则 MBS服务器可 以在与该终端交互退出 MBS业务的信令后， 通知承载网络， 具体的步骤与实 施方式与步骤 205至步骤 215类似， 此处不再赞述。  It should be noted that the IGMP message in this embodiment is only a manifestation of application layer signaling, and the terminal can directly interact with the MBS server through any form of application layer signaling (the WiMAX bearer network only serves as a bearer, and the signaling content If the MBS server does not perceive the signaling of the MBS service, the MBS server may only instruct the key management entity to stop updating the key for the terminal and stop charging the user. If the network is aware of the bearer, the MBS server may notify the bearer network after the signaling of the MBS service is removed from the terminal. The specific steps and implementations are similar to the steps 205 to 215, and are not mentioned here.
本发明第二实施方式与第一实施方式大致相同，同样涉及 WiMAX网络中 终端退出 MBS的方法， 具体如图 3所示。 本实施方式中的终端也是激活态的 终端， 由终端的服务网关为终端提供相应的 MBS。  The second embodiment of the present invention is substantially the same as the first embodiment, and also relates to a method for a terminal to exit the MBS in a WiMAX network, as shown in FIG. The terminal in this embodiment is also an active terminal, and the service gateway of the terminal provides the terminal with the corresponding MBS.
在终端希望退出 MBS业务时， 进入步骤 301， 终端借用 R1接口消息， 如 When the terminal wants to exit the MBS service, the process proceeds to step 301, where the terminal borrows the R1 interface message, such as
DSD REQ消息通知基站本终端要退出 MBS业务，消息中携带希望退出的 MBS 的 Multicast CID、 Traffic CID或 /和业务 Π The DSD REQ message informs the base station that the terminal wants to quit the MBS service, and the message carries the Multicast CID, Traffic CID or / and service of the MBS that wishes to exit.
接着进入步骤 302，基站收到 DSD REQ后，借用 R6接口消息，如 RR REQ 消息通知服务网关该终端请求退出 MBS,消息中同样携带希望退出的 MBS的 Multicast CID、 Traffic CID或 /和业务 ID。 Then, proceeding to step 302, after receiving the DSD REQ, the base station borrows the R6 interface message, for example, the RR REQ message notifies the service gateway that the terminal requests to exit the MBS, and the message also carries the MBS that wishes to exit. Multicast CID, Traffic CID or / and service ID.
接着进入步骤 303，服务网关收到请求后， 向 MBS服务器发起 MBS业务 退出请求，其中标明请求退出 MBS业务， 消息内容还包括： 终端 ID ( MSID )、 终端 NAI ( MS NAI )、 业务 ID ( Service ID )、 内容标识（ Content ID )、 IP多 播地址、 离开标识（Leave Indicator )等内容。 使得 MBS服务器能够根据该消 息唯一确定需要退出 MBS的终端和对应的 MBS。  Then, proceeding to step 303, after receiving the request, the serving gateway initiates an MBS service exit request to the MBS server, where the request indicates that the MBS service is requested to be withdrawn, and the message content further includes: a terminal ID (MSID), a terminal NAI (MS NAI), and a service ID (Service). ID), Content ID, IP Multicast Address, Leave Indicator, etc. This enables the MBS server to uniquely determine the terminal and corresponding MBS that need to exit the MBS based on the message.
接着进入步骤 304， MBS服务器收到该终端退出 MBS的请求后， 对消息 内容的合法性进行确认， 在确认合法后， 向服务网关返回成功的响应消息， 并 可以同时修改终端的上下文和 MBS业务上下文； 停止该终端的 MBS计费； 通知网络侧密钥管理实体停止对该终端进行 MBS的密钥更新， 或者执行任意 一种或其组合。  Then, proceeding to step 304, after receiving the request for the terminal to exit the MBS, the MBS server confirms the validity of the message content, returns a successful response message to the service gateway after confirming the validity, and can simultaneously modify the context and the MBS service of the terminal. Context; Stop the MBS charging of the terminal; notify the network side key management entity to stop the key update of the MBS for the terminal, or perform any one or a combination thereof.
接着进入步骤 305, 服务网关收到该成功的响应消息后， 借用对应的 R6 接口消息， 如 RR RSP消息向该终端的基站发送 MBS退出响应消息， 该响应 消息内容包含 MSID、 该 MBS业务对应的服务流标识以及退出业务指示等信 息。  Then, in step 305, after receiving the successful response message, the serving gateway borrows the corresponding R6 interface message, such as an RR RSP message, to send an MBS exit response message to the base station of the terminal, where the content of the response message includes the MSID and the corresponding MBS service. Information such as the service flow identifier and the exit service indication.
接着进入步骤 306 , 基站收到该响应消息后， 借用对应的 R1接口消息， 如 DSD RSP消息通知对应终端完成退出 MBS流程， 消息内容包含 MSID、 该 MBS业务对应的服务流标识以及退出业务指示等信息。  Then, in step 306, after receiving the response message, the base station borrows the corresponding R1 interface message, for example, the DSD RSP message notifies the corresponding terminal to complete the exit MBS process, and the message content includes the MSID, the service flow identifier corresponding to the MBS service, and the exit service indication. information.
接着进入步骤 307， 终端成功收到该消息后， 可以选择性地向基站返回退 出应答， 通知基站本终端已确认退出 MBS。 如果该基站通过 PTP模式承载该 MBS业务， 则基站可以释放该终端 MBS对应的空口资源，避免空口资源被空 置， 造成资源浪费。 接着进入步骤 308。  Then, proceeding to step 307, after successfully receiving the message, the terminal may selectively return an exit response to the base station, and notify the base station that the terminal has confirmed to exit the MBS. If the base station carries the MBS service through the PTP mode, the base station can release the air interface resource corresponding to the MBS of the terminal to prevent the air interface resource from being vacant, resulting in waste of resources. Then proceed to step 308.
步骤 308至步骤 315与步骤 208至步骤 215相类似，具体伴见上述，在此 不再赘述。  Steps 308 to 315 are similar to steps 208 to 215, and are specifically referred to above, and are not described herein again.
本发明第三实施方式与第二实时方式的实现过程大致相同， 同样涉及 The third embodiment of the present invention is substantially the same as the implementation process of the second real-time mode, and is also related to
WiMAX网络中终端退出 MBS的方法， 具体如图 4所示。 本实施方式中的终 端也是激活态的终端， 由终端的服务网关为终端提供相应的 MBS。 The method for the terminal to exit the MBS in the WiMAX network is shown in Figure 4. The terminal in this embodiment is also an active terminal, and the serving gateway of the terminal provides the terminal with the corresponding MBS.
步骤 401 : 终端向 ASN主动发送退出 MBS业务（如 DSD-REQ消息）， 请求退出某 MBS业务。该消息携带的参数包括： MBS业务标识（可以为 SFID, 或 MBS Contents ID,或组播 IP地址 /端口号 ,或证明标识 Authentication Token, Multicast CID等）， 和 /或组播指示 （ MBS Service )， 但并不限于此。 Step 401: The terminal actively sends an exit MBS service (such as a DSD-REQ message) to the ASN, requesting to quit an MBS service. The parameters carried by the message include: MBS service identifier (which can be SFID, Or MBS Contents ID, or multicast IP address/port number, or proof authority Authentication Token, Multicast CID, etc., and/or MBS Service, but not limited to this.
步骤 402: ASN向 PF发送终端退出 MBS业务请求消息（对于漫游场景， 要在 V-PF和 H-PF间进行中转）， 该消息携带的参数包括： MBS业务标识和 / 或删除指示， 但并不限于此。  Step 402: The ASN sends a terminal to the PF to quit the MBS service request message (for the roaming scenario, to be transferred between the V-PF and the H-PF), and the parameters carried by the message include: an MBS service identifier and/or a deletion indication, but Not limited to this.
步骤 403: PF向 MBS服务器发送终端退出 MBS业务请求消息， 该消息 携带的参数包括： MBS业务标识和删除指示等。  Step 403: The PF sends a terminal to the MBS server to quit the MBS service request message, and the parameters carried by the message include: an MBS service identifier and a deletion indication.
步骤 404: MBS服务器进行策略后， 向 PF发送删除终端退出 MBS业务 响应消息，该消息携带的参数包括： MBS业务标识和处理结果。该步骤后 MBS 服务器修改所述 MBS业务上下文及终端上下文， 停止对该终端用户计费， 停 止给该终端用户分发密钥。  Step 404: After the MBS server performs the policy, the MBS service response message is sent to the PF, and the parameters carried by the message include: an MBS service identifier and a processing result. After this step, the MBS server modifies the MBS service context and the terminal context, stops charging the terminal user, and stops distributing the key to the terminal user.
步骤 405: PF向 ASN发送终端退出 MBS业务响应消息。 该消息携带的 参数包括： MBS业务标识和处理结果。  Step 405: The PF sends a terminal to the ASN to exit the MBS service response message. The parameters carried in the message include: MBS service identifier and processing result.
步骤 406: ASN和终端继续 DSD过程，完成终端侧的 MBS资源删除过程。 在该步骤之后，可能引发传输模式转换以及承载的调整，其具体的实现过 程与上述实施例相类似， 在此不再赞述。  Step 406: The ASN and the terminal continue the DSD process, and complete the MBS resource deletion process on the terminal side. After this step, the transmission mode transition and the adjustment of the bearer may be initiated, and the specific implementation process is similar to the above embodiment, and will not be described here.
本发明第四实施方式涉及 WiMAX网络中终端退出 MBS的方法， 具体如 图 5所示。 本实施方式中的终端是空闲态的终端， 在本实施方式中， 空闲态的 终端可以通过现有的 Location Update (位置更新 )流程实现 MBS业务的退出。  A fourth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network, as shown in FIG. 5. The terminal in this embodiment is a terminal in an idle state. In the present embodiment, the terminal in the idle state can implement the exit of the MBS service through the existing Location Update procedure.
在空闲态终端希望退出 MBS时， 进入步骤 501， 终端通知基站本终端要 退出 MBS, 具体可以通过扩展的 "Rng— Req"消息来通知。 "Rng— Req"消息中动 作代码 Action Code为位置更新 Location Update, 终端在 "Rng— Req"消息中加 入 MBS业务标识以及 Multicast CID、 SFID、 Content ID等内容， 同时可以在 消息中加入退出 MBS的标识。  When the idle terminal wants to exit the MBS, the process proceeds to step 501, and the terminal notifies the base station that the terminal wants to exit the MBS, and may specifically notify by using the extended "Rng_Req" message. In the "Rng-Req" message, the action code is Location Update. The terminal adds the MBS service identifier and the Multicast CID, SFID, Content ID, etc. in the "Rng_Req" message, and can also add the MBS exit message to the message. Logo.
接着进入步骤 502 ,基站收到该消息后，根据正常的 Location Update流程 , 通过请求消息， 如" Location Update Req"消息通知锚点 PC, 可以直接通知锚点 PC或通过中继 PC间接通知锚点 PC。其中，该" Location Update Req"消息中包 含退出 MBS的标识以及该 MBS的业务标识、 Multicast CID, SFID、 Content ID 等内容之一或其任意组合。 接着进入步骤 503 ,锚点 PC收到基站发送的" Location Update Req"消息后， 根据现有的 Location Update流程对消息进行处理， 如果发现消息中包含退出 MBS的标识， 则锚点 PC向该 MBS对应的服务器发起退出 MBS业务授权请 求， 在消息中包含 MSID、 NAI以及对应的 MBS标识。 Then, proceeding to step 502, after receiving the message, the base station may directly notify the anchor PC or notify the anchor point through the relay PC through the request message, such as the "Location Update Req" message, to notify the anchor PC according to the normal Location Update process. PC. The "Location Update Req" message includes one of the identifier of the exit MBS and one of the MBS service identifier, the multicast CID, the SFID, the Content ID, or any combination thereof. Then, proceeding to step 503, after receiving the "Location Update Req" message sent by the base station, the anchor PC processes the message according to the existing Location Update process. If the discovery message includes the identifier of the exit MBS, the anchor PC sends the message to the MBS. The corresponding server initiates the exit MBS service authorization request, and the message includes the MSID, the NAI, and the corresponding MBS identifier.
接着进入步骤 504， MBS服务器收到该请求后，进行相应的授权，在 MBS 服务器确认授权通过后， 向锚点 PC返回成功的响应消息。 还可以同时修改终 端的上下文和 MBS业务上下文， 并停止该终端的 MBS计费并通知网络侧密 钥管理实体停止对该终端进行 MBS的密钥更新。  Then, proceeding to step 504, after receiving the request, the MBS server performs corresponding authorization, and after the MBS server confirms the authorization, returns a successful response message to the anchor PC. It is also possible to modify the context of the terminal and the MBS service context at the same time, and stop the MBS charging of the terminal and notify the network-side key management entity to stop the MBS key update for the terminal.
接着进入步骤 505， 锚点 PC依据现有的 Location Update流程向基站侧返 回响应消息， 如" Location Update Response", 该消息同样可以可能直接返回基 站或通过中继 PC间接返回基站。 消息中包含 MBS标识以及对终端退出此业 务的确认标识。  Then, proceeding to step 505, the anchor PC returns a response message to the base station side according to the existing Location Update process, such as "Location Update Response", and the message may also return directly to the base station or indirectly to the base station through the relay PC. The message contains the MBS identifier and a confirmation ID that the terminal exits the service.
接着进入步骤 506, 基站收到该" Location Update Response"消息后， 在验 证终端发送的 "Rng— Req"消息的合法性之后 , 通过对应的" Rng— Rsp"消息通知 该终端 Location Update成功， 同时表明对应的 MBS已退出。 在该" Rng— Rsp" 消息中需包含 MBS标识以及结果标识。  Then, proceeding to step 506, after receiving the "Location Update Response" message, the base station, after verifying the validity of the "Rng_Req" message sent by the terminal, notifies the terminal that the Location Update is successful through the corresponding "Rng_Rsp" message. Indicates that the corresponding MBS has exited. The MBS ID and the result ID are included in the "Rng_Rsp" message.
接着进入步骤 507， 终端成功收到该消息后， 可以选择性地向基站返回对 应的响应消息。  Then, proceeding to step 507, after successfully receiving the message, the terminal may selectively return a corresponding response message to the base station.
接着进入步骤 508 ,基站收到该消息后，根据 Location Update流程向锚点 PC返回" Location Update Confirm"消息 , 消息中包含终端退出 MBS的标识及 对应的 MBS标识， 通知锚点 PC终端已经对成功退出 MBS进行了确认。  Then, proceeding to step 508, after receiving the message, the base station returns a "Location Update Confirm" message to the anchor PC according to the Location Update process, where the message includes the identifier of the terminal exiting the MBS and the corresponding MBS identifier, and the anchor PC terminal is notified that the packet has succeeded. Exiting MBS was confirmed.
接着进入步骤 509， 锚点 PC成功收到" Location Update Confirm"消息后 , 与 MBS服务器进行交互， 向 MBS服务器发送退出确认， 通知 MBS服务器该 终端已完全退出指定的 MBS业务  Then, proceeding to step 509, after the anchor PC successfully receives the "Location Update Confirm" message, it interacts with the MBS server, sends an exit confirmation to the MBS server, and notifies the MBS server that the terminal has completely exited the specified MBS service.
接着进入步骤 510， MBS服务器收到该确认消息后， 修改终端上下文和 / 或修改该 MBS业务上下文， 并停止该终端的 MBS计费， 指示网络侧密钥管 理实体停止对该终端进行 MBS的密钥更新。 之后向锚点 PC返回退出 ACK。 通过停止为该终端更新 MBS业务的密钥， 使得 MBS业务密钥改变时， 终端 无法继续使用该 MBS业务， 通过这一方法确保终端在停止计费后终止使用该 MBS。 Then, in step 510, after receiving the acknowledgement message, the MBS server modifies the terminal context and/or modifies the MBS service context, and stops the MBS charging of the terminal, instructing the network side key management entity to stop the MBS secret to the terminal. Key update. The exit ACK is then returned to the anchor PC. By stopping the update of the key of the MBS service for the terminal, when the MBS service key is changed, the terminal cannot continue to use the MBS service, and the method ensures that the terminal terminates the use after stopping the charging. MBS.
接着进入步骤 511，锚点 PC向基站返回相应的退出 ACK,通知基站 MBS 服务器已正式终止该终端使用 MBS并已停止了相应计费。  Next, proceeding to step 511, the anchor PC returns a corresponding exit ACK to the base station, notifying the base station that the MBS server has officially terminated the terminal using the MBS and has stopped the corresponding charging.
步骤 509至步骤 511为可选步骤，如果在步骤 504中已经进行了上下文修 订、 计费及密钥相关操作， 则步骤 509至步骤 511可以不必执行。  Steps 509 through 511 are optional steps. If context modification, charging, and key related operations have been performed in step 504, steps 509 through 511 may not be performed.
需要说明的是，在锚点 PC收到基站返回的位置更新确认（Location Update Confirm ) 消息后， 还应该通知锚点网关修改其保存的终端上下文信息。  It should be noted that after the anchor PC receives the location update confirmation (Location Update Confirm) message returned by the base station, the anchor gateway should also be notified to modify the saved terminal context information.
本发明第五实施方式涉及 WiMAX网络中终端退出 MBS的方法。 在本实 施方式中， 终端并非主动退出 MBS, 而是在终止为终端提供服务的条件被满 足时（比如余额不足等）， 由 MBS服务器终止该终端的 MBS业务， 具体如图 6所示。  A fifth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network. In this embodiment, the terminal does not actively exit the MBS, but when the condition for terminating the service to the terminal is satisfied (such as insufficient balance), the MBS server terminates the MBS service of the terminal, as shown in FIG. 6.
在终止为终端提供服务的条件被满足时，进入步骤 601， MBS服务器向为 该终端承载 MBS的网关 （服务网关或锚点网关）， 发送 MBS业务退出指示。 指示消息中包含： MSID、 NAI、 MBS业务标识、 MBS内容标识等， 唯一确定 需要退出 MBS的终端和对应的 MBS。 MBS服务器可以在此步骤同时修改终 端的上下文和 MBS业务上下文， 并停止该终端的 MBS计费并通过网络侧密 钥管理实体停止对该终端进行 MBS的密钥更新。  When the condition for terminating the service to the terminal is satisfied, the process proceeds to step 601, and the MBS server sends an MBS service exit indication to the gateway (service gateway or anchor gateway) that carries the MBS for the terminal. The indication message includes: MSID, NAI, MBS service identifier, MBS content identifier, etc., and uniquely determines the terminal that needs to exit the MBS and the corresponding MBS. The MBS server can modify the context of the terminal and the MBS service context at the same time, and stop the MBS charging of the terminal and stop the MBS key update of the terminal through the network side key management entity.
接着进入步骤 602， 服务网关或锚点网关收到该消息后， 根据之前保存的 用户信息对该消息进行确认。 并返回响应消息。  Then, proceeding to step 602, after receiving the message, the serving gateway or the anchor gateway confirms the message according to the previously saved user information. And return a response message.
接着进入步骤 603， MBS服务器在收到响应消息后， 如果 MBS服务器在 步骤 601未进行相关上下文修改以及密钥、计费相关操作， 则可以在此时进行 相应操作。 由于网络侧密钥管理实体停止为该终端更新密钥， 而 MBS密钥更 新依旧正常进行， 从而终端无法继续使用该 MBS。 为了强制终端立即停止使 用该 MBS， MBS服务器可以在确认不再为该终端提供该 MBS之后， 发起一 次 MBS业务密钥更新的流程，使得终端无法通过原有的密钥继续使用该 MBS。  Then, in step 603, after receiving the response message, the MBS server may perform corresponding operations at this time if the MBS server does not perform related context modification and key and charging related operations in step 601. Since the network side key management entity stops updating the key for the terminal, and the MBS key update is still performed normally, the terminal cannot continue to use the MBS. In order to force the terminal to immediately stop using the MBS, the MBS server can initiate an MBS service key update process after confirming that the MBS is no longer provided for the terminal, so that the terminal cannot continue to use the MBS through the original key.
步骤 602、 603在这里是可选的， 如果在此时不发生， 可以等到步骤 608、 609时发生。  Steps 602, 603 are optional here, and if they do not occur at this time, they may wait until steps 608, 609.
接着进入步骤 604， 服务网关或锚点网关借用 R6接口消息， 如 RR REQ 消息通知该终端的基站该终端已不能再使用该 MBS 业务。 消息内容包含 MSID、 该 MBS业务对应的服务流标识以及退出业务指示等信息。 接着进入步骤 605 , 基站收到该通知后， 借用 R1接口消息， 如 DSD REQ 消息通知对应终端退出 MBS, 消息内容包含 MSID、 该 MBS业务对应的服务 流标识以及退出业务指示等信息。 Then, proceeding to step 604, the serving gateway or the anchor gateway borrows the R6 interface message, and the RR REQ message informs the base station of the terminal that the terminal can no longer use the MBS service. Message content contains MSID, service flow identifier corresponding to the MBS service, and information such as the exit service indication. Then, in step 605, after receiving the notification, the base station borrows the R1 interface message, for example, the DSD REQ message notifies the corresponding terminal to exit the MBS, and the message content includes the MSID, the service flow identifier corresponding to the MBS service, and the information of the exit service indication.
接着进入步骤 606， 终端收到该消息后， 向基站返回对应的响应消息， 如 Then, proceeding to step 606, after receiving the message, the terminal returns a corresponding response message to the base station, such as
DSD REP消息。 如果该基站通过 PTP模式承载该 MBS业务， 则在 DSD过程 中释放该终端 MBS的空口资源， 避免空口资源被空置， 造成资源浪费； 如果 该基站通过 PTM模式承载该 MBS业务， 则 DSD过程只起通告的作用， 由终 端自行释放其资源。 接着进入步骤 507。 DSD REP message. If the base station carries the MBS service through the PTP mode, the air interface resource of the terminal MBS is released in the DSD process to prevent the air interface resource from being vacant, resulting in waste of resources. If the base station carries the MBS service through the PTM mode, the DSD process only starts. The role of the announcement, the terminal itself releases its resources. Then proceed to step 507.
步骤 608、 609为可选步骤， 如果步骤 602、 603已执行， 则此两步不必执 行； 如果步骤 602、 603未执行， 则此处需执行， 其执行内容与 602、 603一致。  Steps 608 and 609 are optional steps. If steps 602 and 603 have been executed, the two steps do not have to be performed. If the steps 602 and 603 are not performed, the execution is performed here, and the execution content is consistent with 602 and 603.
步骤 610至步骤 613与步骤 208至步骤 214相类似，其中， 步骤 610至步 骤 611是可选的， 即服务网关或锚点网关可以向 MBS服务器发送 MBS退出 确认， 在收到 MBS服务器的 ACK应答后， 通知锚定网关修改终端上下文， 再向基站返回相应的退出 ACK; 或服务网关或锚点网关在收到来自基站的退 出应答后， 通知锚定网关修改终端上下文， 将该 MBS信息删除。  Steps 610 to 613 are similar to steps 208 to 214, wherein steps 610 to 611 are optional, that is, the serving gateway or the anchor gateway may send an MBS exit confirmation to the MBS server, and receive an ACK response from the MBS server. Afterwards, the anchoring gateway is notified to modify the terminal context, and then the corresponding exit ACK is returned to the base station; or after receiving the exit response from the base station, the serving gateway or the anchor gateway notifies the anchoring gateway to modify the terminal context, and deletes the MBS information.
本发明第六实施方式与第五实施例类似， MBS服务器主动终止所述终端 的 MBS业务， 具体如图 7所示。  The sixth embodiment of the present invention is similar to the fifth embodiment. The MBS server actively terminates the MBS service of the terminal, as shown in FIG. 7.
步骤 701:MBS服务器向 PF发送终端退出请求，该请求携带的参数可以包 括 MBS业务标识及用于标识终端的终端标识（如网络接入标识 NAI )。 同时 指示网络侧密钥管理实体停止为所述终端更新密钥。  Step 701: The MBS server sends a terminal exit request to the PF, where the parameters carried by the request may include an MBS service identifier and a terminal identifier (such as a network access identifier NAI) for identifying the terminal. At the same time, the network side key management entity is instructed to stop updating the key for the terminal.
步骤 702: PF (策略功能） 向 ASN发送终端退出请求， 该请求携带的参 数可以包括 MBS 业务标识及用于标识终端的终端标识 （如网络接入标识 NAI )。 当 PF向 ASN发送 MBS删除请求时， ASN修改 MBS业务上下文及终 端上下文。  Step 702: The PF (Policy Function) sends a terminal exit request to the ASN, where the parameters carried by the request may include an MBS service identifier and a terminal identifier (such as a network access identifier NAI) for identifying the terminal. When the PF sends an MBS delete request to the ASN, the ASN modifies the MBS service context and the terminal context.
若存在漫游情况， 上述过程可能需要通过 V-PF (漫游地 PF )和 H-PF (本 地 PF )的中转。 上述删除 MBS业务请求可能的路径为： MBS服务器 - PF - Anchor SFA (锚定业务授权者 ) - Serving SFA (服务业务授权者）。  If there is roaming, the above process may require transit through V-PF (Roaming PF) and H-PF (Local PF). The possible paths for deleting MBS service requests above are: MBS Server - PF - Anchor SFA - Serving SFA (Service Business Authorizer).
步骤 703: ASN向终端发送终端退出 MBS业务请求， 比如 ASN通过动态 业务删除请求消息 DSD-REQ向终端发送 MBS业务删除请求， 通过动态业务 修改请求消息 DSC-REQ向终端发送 MBS业务修改请求。 所述消息中携带的 参数可以为 MBS业务标识和 /或组播指示（MBS Service )。 MBS业务标识可以 为 SFID、 MBS Contents ID或组播 IP地址 /端口号、 Multicast CID、 MBS GSA ID或授权令牌。 Step 703: The ASN sends a terminal to the terminal to quit the MBS service request, for example, the ASN passes the dynamic The service deletion request message DSD-REQ sends an MBS service deletion request to the terminal, and sends an MBS service modification request to the terminal through the dynamic service modification request message DSC-REQ. The parameter carried in the message may be an MBS service identifier and/or a multicast indication (MBS Service). The MBS service identifier can be an SFID, an MBS Contents ID or a multicast IP address/port number, a Multicast CID, an MBS GSA ID, or an authorization token.
步骤 704: 终端处理该请求， 返回处理结果至 ASN。 若是删除 MBS业务， 则终端删除该 MBS业务相关的资源。  Step 704: The terminal processes the request and returns the processing result to the ASN. If the MBS service is deleted, the terminal deletes the resources related to the MBS service.
步骤 705: ASN向 PF返回删除 MBS业务响应。  Step 705: The ASN returns to the PF to delete the MBS service response.
步骤 706: PF向 MBS服务器返回删除 MBS业务响应。  Step 706: The PF returns a MBS service response to the MBS server.
在此之后，可能引发传输模式转换以及承载的调整，与上述实施例相类似， 在此不再赘述。  After that, the transmission mode transition and the adjustment of the bearer may be caused, which are similar to the above embodiment, and are not described herein again.
本发明第七实施方式涉及 WiMAX网络中终端退出 MBS的方法。 本实施 方式中的终端是空闲态的终端， 在终端退网时（主动退网、被动退网或意外退 网）， 或者终端移动出原来的 MBS域时， 锚点 PC作为代理， 代替空闲态终端 发起退出 MBS业务， 具体如图 8所示。  A seventh embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network. The terminal in this embodiment is an idle state terminal. When the terminal retires from the network (actively retiring, passively retiring, or accidentally retiring), or when the terminal moves out of the original MBS domain, the anchor PC acts as a proxy instead of the idle state. The terminal initiates the exit of the MBS service, as shown in Figure 8.
在步骤 801中， 锚点 PC发现空闲态终端退网。 空闲态终端退网可以为终 端在空闲模式下关机、 经过一个成功的带有退网标识的位置更新过程 ( Power Down Location Update ); 或者网络侧 AAA服务器、 外部代理、 锚点 PC之一 或其任意组合触发该空闲态终端退网； 或者锚点 PC发现该空闲态终端异常掉 网。 或者锚点 PC所保存的该终端的 MBS业务信息， 发现对于该终端正在接 收的某个 MBS业务，在位置更新流程后的基站与之前的基站属于不同的 MBS 域。  In step 801, the anchor PC finds that the idle state terminal exits the network. The idle state terminal exits the network, and the terminal can be shut down in the idle mode, after a successful location update process with the network identifier (Power Down Location Update); or one of the network side AAA server, the external proxy, the anchor PC or Any combination of the idle state terminal is triggered to exit the network; or the anchor PC finds that the idle state terminal is abnormally dropped. Or the MBS service information of the terminal saved by the anchor PC finds that the base station after the location update process belongs to a different MBS domain than the previous base station for the MBS service that the terminal is receiving.
接着进入步骤 802，锚点 PC根据所保存的该终端的 MBS业务信息， 向相 关的 MBS服务器发送 MBS业务退出请求， 请求退出 MBS业务。  Next, proceeding to step 802, the anchor PC sends an MBS service exit request to the associated MBS server according to the saved MBS service information of the terminal, requesting to quit the MBS service.
接着进入步骤 803， MBS服务器收到该请求后， 修改该终端的上下文和 / 或该 MBS业务的上下文， 并停止该终端的 MBS计费， 通知网络侧密钥管理 实体停止对该终端进行 MBS的密钥更新。 从而使得终端在因意外关机时， 也 能正常退出 MBS业务， 停止该业务的计费。  Then, proceeding to step 803, after receiving the request, the MBS server modifies the context of the terminal and/or the context of the MBS service, and stops the MBS charging of the terminal, and notifies the network-side key management entity to stop performing MBS on the terminal. Key update. Therefore, when the terminal is shut down unexpectedly, the terminal can normally exit the MBS service and stop charging for the service.
对于终端移动出 MBS域的场景， 锚点 PC需进一步通知锚点网关修改终 端上下文。 For the scenario in which the terminal moves out of the MBS domain, the anchor PC needs to further notify the anchor gateway to modify the terminal. Side context.
本发明第八实施方式涉及 WiMAX网络中终端退出 MBS的方法。 本实施 方式中的终端 激活态终端或空闲态的终端， 在终端退网时（主动退网、被 动退网或意外退网），锚点网关作为代理，代替该终端发起退出 MBS业务， 具 体如图 9所示。  An eighth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network. In the terminal activation state terminal or the idle state terminal in the embodiment, when the terminal retires the network (active network retreat, passive network retreat, or accidental network retreat), the anchor gateway acts as a proxy, instead of the terminal, initiates the exit of the MBS service, specifically, for example, Figure 9 shows.
在步骤 901中，锚点网关发现终端退网。对于激活态终端，不论主动退网、 被动退网或意外退网，锚定网关会收到来自服务网关或服务基站的用于指示用 户退网的消息， 此消息可以为数据通道去注册消息； 对于空闲态终端， 不论主 动退网、 被动退网或意外退网， 在锚点 PC处理完退网流程后， 会由锚点 PC 通知对应锚点网关该终端退网。  In step 901, the anchor gateway discovers that the terminal exits the network. For the active state terminal, whether the active network exits, the passive network exit, or the unexpected network exit, the anchor gateway receives a message from the serving gateway or the serving base station for instructing the user to quit the network, and the message may register the message for the data channel; For the idle state terminal, whether the active network is disconnected, the passive network is disconnected, or the network is unexpectedly retired, after the anchor PC processes the network retreat process, the anchor PC notifies the corresponding anchor gateway that the terminal exits the network.
接着进入步骤 902， 锚点网关在发现此终端退网之后， 根据所保存的该终 端的 MBS业务信息，如果发现需要退出的 MBS业务，则向相关的 MBS服务 器发送 MBS业务退出请求， 请求退出 MBS业务。  Then, proceeding to step 902, after discovering that the terminal is offline, the anchor gateway sends an MBS service exit request to the relevant MBS server according to the saved MBS service information of the terminal, and requests to exit the MBS. business.
接着进入步骤 903， MBS服务器收到该请求后， 修改该终端的上下文和 / 或该 MBS业务的上下文， 并停止该终端的 MBS计费， 通知网络侧密钥管理 实体停止对该终端进行 MBS的密钥更新。 从而使得终端在因意外关机时， 也 能正常退出 MBS业务， 停止该业务的计费。  Then, proceeding to step 903, after receiving the request, the MBS server modifies the context of the terminal and/or the context of the MBS service, and stops the MBS charging of the terminal, and notifies the network-side key management entity to stop performing MBS on the terminal. Key update. Therefore, when the terminal is shut down unexpectedly, the terminal can normally exit the MBS service and stop charging for the service.
本发明第九实施方式涉及 WiMAX网络中终端退出 MBS的方法。 本实施 方式中的终端是是激活态终端， 在终端移动出原来的 MBS域时， 目标或者源 ASN作为代理， 代替该终端发起退出 MBS业务， 具体如图 10所示。  A ninth embodiment of the present invention relates to a method for a terminal to exit an MBS in a WiMAX network. The terminal in this embodiment is an active state terminal. When the terminal moves out of the original MBS domain, the target or source ASN acts as a proxy, instead of the terminal, initiates the exit of the MBS service, as shown in FIG.
在步骤 1001 中， 终端经过切换流程， 从源 ASN切换到目标 ASN, 移出 了正在接收 MBS业务的 MBS域。  In step 1001, the terminal switches from the source ASN to the target ASN through the handover procedure, and removes the MBS domain that is receiving the MBS service.
接着进入步骤 1002, 源 ASN在发现此终端切换完成之后， 根据所保存的 该终端的 MBS业务信息以及在切换过程中得到的目标 ASN的信息，如果发现 对于终端正在接收的某 MBS业务， 目标 ASN与源 ASN不属于同一个 MBS 域，即发现终端移动出了原有的 MBS域时，则向相关的 MBS服务器发送 MBS 业务退出请求， 请求退出 MBS业务。  Then, proceeding to step 1002, after the source ASN finds that the terminal handover is completed, according to the saved MBS service information of the terminal and the information of the target ASN obtained in the handover process, if the MBS service that is being received by the terminal is found, the target ASN is found. If the source ASN does not belong to the same MBS domain, that is, when the terminal moves out of the original MBS domain, it sends an MBS service exit request to the relevant MBS server to request to exit the MBS service.
或者  Or
进入步骤 1002'， 目标 ASN在发现此终端切换完成之后 ,根据所得到的该 终端的 MBS业务信息以及在切换过程中得到的源 ASN的信息，如果发现对于 终端正在接收的某 MBS业务， 目标 ASN与源 ASN不属于同一个 MBS域， 即发现终端移动出了原有的 MBS域时， 则向相关的 MBS服务器发送 MBS 业务退出请求， 请求退出 MBS业务。 Go to step 1002', after the target ASN finds that the terminal handover is completed, according to the obtained If the MBS service information of the terminal and the source ASN information obtained during the handover process are found, the target ASN and the source ASN do not belong to the same MBS domain, and the terminal is found to have moved out of the original MBS. In the case of a domain, an MBS service exit request is sent to the relevant MBS server to request to exit the MBS service.
接着进入步骤 1003 , MBS服务器收到该请求后， 修改该终端的上下文和 / 或该 MBS业务的上下文， 并停止该终端的 MBS计费， 通知网络侧密钥管理 实体停止对该终端进行 MBS的密钥更新。 从而使得终端在因意外关机时， 也 能正常退出 MBS业务， 停止该业务的计费。  Then, proceeding to step 1003, after receiving the request, the MBS server modifies the context of the terminal and/or the context of the MBS service, and stops the MBS charging of the terminal, and notifies the network-side key management entity to stop performing MBS on the terminal. Key update. Therefore, when the terminal is shut down unexpectedly, the terminal can normally exit the MBS service and stop charging for the service.
需要说明的是， 如果在切换过程中存在锚点 ASN, 则锚点 ASN也可以代 理终端发起退出 MBS业务， 其过程与前述一致。  It should be noted that if there is an anchor ASN in the handover process, the anchor ASN can also initiate the exit MBS service by the proxy terminal, and the process is consistent with the foregoing.
需要说明的是， ASN与 MBS服务器之间的通信可能经过策略控制实体， 与实施例三类似， 在此不再赞述。  It should be noted that the communication between the ASN and the MBS server may be through a policy control entity, which is similar to the third embodiment, and is not mentioned here.
所述 ASN包括网关以及基站。 下文中的 ASN与此处含义相同，将不再赞 述。  The ASN includes a gateway and a base station. The ASN below has the same meaning as here and will not be mentioned.
需要说明的是， 在上述各实施方式中涉及到的相关网元为基站、 网关、 寻 呼控制器、 策略控制实体和 MBS服务器， 但在实际应用中， 还可以有 MBS 代理（MBS Proxy )或其他网关， 其具体操作与基站或网关相类似， 在此不再 赘述。  It should be noted that the related network elements involved in the foregoing embodiments are a base station, a gateway, a paging controller, a policy control entity, and an MBS server, but in actual applications, there may also be an MBS proxy (MBS Proxy) or The specific operations of the other gateways are similar to those of the base station or the gateway, and are not described here.
本发明第十实施方式涉及一种多播广播*** ,该***中包含至少一个用于 提供 MBS服务的 MBS服务器， 以及连接 MBS服务器和终端的承载网络， 该 MBS服务器还用于在收到终端退出 MBS的请求或终止为终端提供服务的条件 满足后， 指示网络侧密钥管理实体停止为该终端进行 MBS的密钥更新。 通过 停止为该终端更新 MBS业务的密钥， 使得 MBS业务密钥改变时， 终端无法 继续使用该 MBS业务，通过这一方法确保终端在停止计费后终止使用该 MBS。 该承载网络中包含服务网关、 锚点网关、 锚点 PC和基站。  A tenth embodiment of the present invention relates to a multicast broadcast system including at least one MBS server for providing an MBS service, and a bearer network connecting the MBS server and the terminal, the MBS server also being used to exit at the receiving terminal After the MBS request or termination condition for providing the service to the terminal is satisfied, the network side key management entity is instructed to stop performing the MBS key update for the terminal. By stopping the update of the key of the MBS service for the terminal, when the MBS service key is changed, the terminal cannot continue to use the MBS service, and this method ensures that the terminal terminates the use of the MBS after stopping the charging. The bearer network includes a service gateway, an anchor gateway, an anchor PC, and a base station.
锚点网关还还进一步包含以下之一或其任意组合： 在发现终端需退出 MBS后， 如确定终端退网时， 通知 MBS服务器或该终端的服务网关该终端退 出 MBS的单元； 和 /或在收到终端退出 MBS的通知后， 修改终端上下文的单 元。 服务网关还进一步包含以下单元之一或其任意组合：在收到激活态终端退 出该 MBS的通知后， 通知 MBS服务器该终端退出 MBS的单元； 在终端退出 MBS后， 修改终端的上下文和 /或 MBS业务对应的上下文的单元； 在终端退 出 MBS后， 通知锚点网关修改该终端的上下文的单元； 在终端退出 MBS后， 通知该终端所在的基站该终端退出 MBS的单元。 The anchor gateway further includes one of the following or any combination thereof: after discovering that the terminal needs to exit the MBS, for example, when determining that the terminal exits the network, notifying the MBS server or the serving gateway of the terminal that the terminal exits the MBS unit; and/or After receiving the notification that the terminal exits the MBS, the unit of the terminal context is modified. The service gateway further includes one of the following units or any combination thereof: after receiving the notification that the active terminal terminates the MBS, notifying the MBS server that the terminal exits the MBS unit; after the terminal exits the MBS, modifying the context of the terminal and/or The unit of the context corresponding to the MBS service; after the terminal exits the MBS, the anchor gateway is notified to modify the unit of the context of the terminal; after the terminal exits the MBS, the base station where the terminal is located is notified that the terminal exits the unit of the MBS.
策略功能实体进一步包括以下单元之一或其任意组合：在收到激活态终端 退出该 MBS的通知后， 通知 MBS服务器该终端退出 MBS的单元； 在所述终 端退出 MBS后， 通知锚点网关修改所述终端的上下文的单元。  The policy function entity further includes one of the following units or any combination thereof: after receiving the notification that the active terminal terminates the MBS, notifying the MBS server that the terminal exits the MBS unit; after the terminal exits the MBS, notifying the anchor gateway to modify The unit of context of the terminal.
基站还进一步包含以下单元之一或其任意组合： 在终端退出 MBS的通知 后， 修改用户上下文的单元和 /或该 MBS业务上下文的单元； 在收到终端退出 MBS的通知后，修改对应 MBS的用户计数的单元； 判断修改后的用户计数是 否满足预定条件的判断单元， 触发该 MBS承载的调整流程的第一单元； 在判 断单元判定修改后的用户计数满足预定条件时， 第一单元触发该 MBS承载的 调整流程。  The base station further includes one of the following units or any combination thereof: after the terminal exits the notification of the MBS, the unit of the user context and/or the unit of the MBS service context are modified; after receiving the notification that the terminal exits the MBS, the corresponding MBS is modified. a unit for counting the user; a determining unit that determines whether the modified user count satisfies a predetermined condition, triggering a first unit of the adjustment process of the MBS bearer; and when the determining unit determines that the modified user count satisfies a predetermined condition, the first unit triggers the The adjustment process of the MBS bearer.
锚点 PC还进一步包含以下单元之一或其任意组合： 在发现空闲态终端需 退出 MBS时， 如确定空闲态终端退网时， 向该 MBS业务对应的 MBS服务器 发起终端退出该 MBS的请求的单元； 在收到终端退出 MBS的通知后， 修改 该终端上下文的单元； 在收到终端退出 MBS的通知后， 通知该终端的锚点网 关修改终端上下文的单元。  The anchor PC further includes one of the following units or any combination thereof: when the idle state terminal needs to exit the MBS, if it is determined that the idle state terminal exits the network, the MBS server corresponding to the MBS service initiates a request for the terminal to exit the MBS. The unit: after receiving the notification that the terminal exits the MBS, modifying the unit of the terminal context; after receiving the notification that the terminal exits the MBS, notifying the anchor gateway of the terminal to modify the unit of the terminal context.
通过锚点网关、 服务网关和锚点 PC, 使得终端无论是在激活态下， 或在 空闲态下， 无论是终端主动希望停止 MBS业务， 或因外因意外关机， 均能正 常退出 MBS业务， 停止该业务的计费。  Through the anchor gateway, the service gateway and the anchor PC, the terminal can exit the MBS service normally, whether it is in the active state or in the idle state, whether the terminal actively wants to stop the MBS service or is unexpectedly shut down due to external reasons. Billing for this service.
需要说明的是， 以上所说的各单元均为逻辑单元，在实际应用中可以在同 一个物理单元中实现， 也可以分为多个物理单元实现。  It should be noted that each unit mentioned above is a logical unit, and may be implemented in the same physical unit in actual application, or may be implemented in multiple physical units.
基于以上实施例， 当 MBS服务器收到终端的退出 MBS业务请求后， 或 者网络侧主动要求终端退出 MBS业务条件满足时， 要保证后续终端不能接收 到该 MBS业务， MBS服务器可能有如下动作：  Based on the above embodiment, when the MBS server receives the exit MBS service request from the terminal, or the network side actively requests the terminal to exit the MBS service condition, the MBS server may have the following actions to ensure that the subsequent terminal cannot receive the MBS service:
1 )可以通知 MBS授权密钥（ MBS Authorization Key, 简称" MAK" )密钥 管理实体， 将该终端从其维护的列表中删除， 以保证后续 MAK密钥更新时不 要对该终端进行更新； 同时可能触发该密钥管理实体发起密钥更新过程；1) The MBS Authorization Key (MAK) key management entity can be notified, and the terminal is deleted from the list maintained by the terminal to ensure that the subsequent MAK key is not updated. The terminal is to be updated; at the same time, the key management entity may be triggered to initiate a key update process;
2 )可以通知组密钥加密密钥 （ Group Key Encryption Key, 简称" GKEK" ) 密钥管理实体， 将该终端从其维护的列表中删除， 以保证后续 MAK密钥更新 时不要对该终端进行更新； 同时可能触发该密钥管理实体发起密钥更新过程； 3 )可以通知 MBS组业务力 p密密钥（ MBS Group Traffic Encryption Key , 简 称" MGTEK" ) 密钥管理实体， 将该终端从其维护的列表中删除， 以保证后续 MAK密钥更新时不要对该终端进行更新； 同时可能触发该密钥管理实体发起 密钥更新过程。 2) The group key encryption key (GKEK) key management entity can be notified, and the terminal is deleted from the list maintained by the terminal to ensure that the subsequent MAK key is not updated when the terminal is updated. Updating; at the same time, the key management entity may be triggered to initiate a key update process; 3) the MBS Group Traffic Encryption Key (MGTEK) key management entity may be notified, and the terminal is The maintenance list is deleted to ensure that the terminal is not updated when the subsequent MAK key is updated. At the same time, the key management entity may be triggered to initiate the key update process.
综上所述，在本发明各实施方式中， MBS服务器收到终端退出 MBS的请 求或终止为终端提供服务的条件满足后， 将修改终端的上下文和 /或相关 MBS 业务的上下文， 停止 MBS业务计费， 并且网络侧密钥管理实体停止为该终端 进行密钥更新， 使得终端在主动发起请求或被动停止接收 MBS业务时， 均能 正常退出 MBS业务， 停止该 MBS业务的计费。  In summary, in the embodiments of the present invention, after receiving the request for the terminal to withdraw from the MBS or the condition for terminating the service provided by the terminal, the MBS server modifies the context of the terminal and/or the context of the related MBS service, and stops the MBS service. The billing is performed, and the network side key management entity stops the key update for the terminal, so that the terminal can normally exit the MBS service and stop charging the MBS service when actively initiating the request or passively stopping receiving the MBS service.
如果终端是激活态的终端， 则在 MBS服务器确认终端退出 MBS业务后， 由 MBS服务器直接通知服务网关， 或通过锚点网关间接通知服务网关该退出 信息， 促使服务网关收到终端退出该 MBS的通知后， 修改终端及业务相关上 下文， 并通知锚点网关修改终端上下文， 以及通知该终端所在的基站该终端退 出 MBS, 基站修改用户上下文和 /或修改该 MBS业务上下文， 修改对应 MBS 的用户计数， 并根据该用户计数触发该 MBS承载的调整流程。  If the terminal is an active terminal, after the MBS server confirms that the terminal exits the MBS service, the MBS server directly notifies the service gateway, or indirectly informs the service gateway of the exit information through the anchor gateway, prompting the service gateway to receive the terminal to exit the MBS. After the notification, modify the terminal and the service-related context, and notify the anchor gateway to modify the terminal context, and notify the base station where the terminal is located, the terminal exits the MBS, the base station modifies the user context and/or modifies the MBS service context, and modifies the user count of the corresponding MBS. And triggering the adjustment process of the MBS bearer according to the user count.
该调整流程包含以下之一或其任意组合：  The adjustment process includes one or any combination of the following:
如果 MBS通过 PTM模式承载， 且修改后的用户计数小于第一门限， 则 触发 MBS用户数目的精确统计，如果精确统计的用户数目满足通过 PTP模式 承载 MBS的条件， 则基站将该 MBS的承载方式由 PTM调整为 PTP, 从而减 少业务资源的耗费， 提高资源的利用率；  If the MBS is carried in the PTM mode, and the modified user count is less than the first threshold, the accurate statistics of the number of MBS users are triggered. If the number of users accurately counted satisfies the condition of carrying the MBS in the PTP mode, the base station carries the MBS. Adjusted to PTP by PTM, thereby reducing the consumption of service resources and improving the utilization of resources;
如果修改后的用户计数为 0，则表明当前没有激活态终端使用该 MBS,触 发 MBS用户数目的精确统计，检测当前是否还有空闲态终端使用该 MBS, 如 果精确统计出的用户数目同样为 0, 则基站通知其服务网关停止向该基站分发 数据， 并可以同时去除该基站与其服务网关之间的 MBS承载并释放该 MBS 对应的空口资源， 避免资源被空置， 形成资源浪费； 如果 MBS通过 PTP模式承载， 则基站无需等到所有用户均退出该 MBS, 可先行释放该终端对应的空口资源，使得资源能及时被循环利用，提高资源的 利用率； If the modified user count is 0, it indicates that the active terminal does not use the MBS, and the exact statistics of the number of MBS users are triggered. It is detected whether there is still an idle state terminal using the MBS, and if the number of users accurately counted is also 0. Then, the base station notifies its serving gateway to stop distributing data to the base station, and can simultaneously remove the MBS bearer between the base station and its serving gateway and release the air interface resource corresponding to the MBS, so as to avoid resources being vacant and forming a waste of resources; If the MBS is carried in the PTP mode, the base station does not need to wait for all the users to exit the MBS, and the air interface resources corresponding to the terminal can be released first, so that the resources can be recycled in time to improve the utilization of resources;
如果服务网关下属的基站都不使用 MBS,则该服务网关需要向 MBS服务 器发起去注册流程，通知其停止再向该网关分发业务数据， 同样起到释放空闲 资源， 避免资源空置形成浪费的作用。  If the base station of the serving gateway does not use the MBS, the service gateway needs to initiate a deregistration process to the MBS server, informing it to stop distributing the service data to the gateway, and also releasing the idle resources, thereby avoiding the waste of resource vacancy.
退出 MBS业务的请求可根据 WiMAX网络的特点， 由终端采用特定信令 通过锚点网关间接向 MBS服务器发出， 或通过基站和业务网关间接向 MBS 服务器发出， 灵活性较高。  The request to exit the MBS service may be sent to the MBS server indirectly through the anchor gateway according to the characteristics of the WiMAX network, or indirectly sent to the MBS server through the base station and the service gateway, and the flexibility is high.
如果 MBS服务器根据终止为终端提供服务的条件触发终端退出相应 MBS 业务， 则首先将终端的信息和对应 MBS信息通知到服务网关， 在发送通知的 同时或收到网关的响应消息后， MBS服务器更新终端的上下文信息及业务上 下文， 终止为该终端提供服务。  If the MBS server triggers the terminal to exit the corresponding MBS service according to the condition for terminating the service for the terminal, the terminal information and the corresponding MBS information are first notified to the serving gateway, and the MBS server updates after receiving the notification or receiving the response message from the gateway. The context information of the terminal and the service context terminate the service for the terminal.
如果述终端为空闲态终端， 则通过终端的锚点寻呼控制器 （Paging Controller, 简称" PC" )向 MBS业务对应的 MBS服务器发起终端退出该 MBS 的请求， 终端可以通过关机时的位置更新触发锚点 PC发送退出 MBS业务的 请求，也可以由终端通过基站主动向锚点 PC请求退出 MBS业务，锚点 PC根 据该请求向对应的 MBS服务器发起 MBS业务退出请求。 使得终端无论是主 动希望停止该 MBS业务， 或因外因意外关机， 均能正常退出 MBS业务， 停 止该业务的计费。  If the terminal is an idle terminal, the terminal paging controller (Paging Controller, referred to as "PC") initiates a request for the terminal to exit the MBS to the MBS server corresponding to the MBS service, and the terminal can update the location through the shutdown. The triggering PC sends a request to log out of the MBS service, and the terminal may request the MBS service to exit from the anchor PC through the base station. The anchor PC initiates an MBS service exit request to the corresponding MBS server according to the request. The terminal can normally exit the MBS service and stop charging the service regardless of whether the terminal wants to stop the MBS service or the unexpected shutdown due to external reasons.
对于终端退网引发的退出 MBS业务， 可以通过终端的锚点网关向 MBS 业务对应的 MBS服务器发起终端退出该 MBS的请求， 对于激活态终端， 不 论主动退网、被动退网或意外退网，锚定网关会收到来自服务网关或服务基站 的用于指示用户退网的消息， 对于空闲态终端， 不论主动退网、被动退网或意 外退网， 在锚点 PC处理完退网流程后， 会通知锚点网关用户退网。 锚点网关 根据其维护的终端上下文中的 MBS业务信息向对应的 MBS服务器发起 MBS 业务退出请求。 使得终端在任何退网场景， 均能正常退出 MBS业务， 停止该 业务的计费。  For the exiting MBS service caused by the terminal exiting the network, the anchor gateway of the terminal may initiate a request for the terminal to exit the MBS to the MBS server corresponding to the MBS service. For the active terminal, whether the network is actively retired, passively retired, or accidentally retired, The anchoring gateway receives a message from the serving gateway or the serving base station to instruct the user to quit the network. For the idle state terminal, whether the active network is disconnected, the passive network is disconnected, or the network is unexpectedly retired, after the anchor PC processes the network retreating process, , will notify the anchor gateway user to quit the network. The anchor gateway initiates an MBS service exit request to the corresponding MBS server according to the MBS service information in the terminal context maintained by it. The terminal can normally exit the MBS service and stop charging for the service in any network exit scenario.
终端退出 MBS 后， 如果该终端所在基站的覆盖范围内已无终端参加该 MBS, 则基站释放 MBS的承载， 并通知该基站所属的服务网关修改所保存的 MBS用户列表； 如果服务网关下辖所有基站均释放了 MBS的承载， 则服务网 关向 MBS服务器请求去注册 MBS, 释放相应资源。 通过对业务需求进行及 时检测， 在无业务需求时及时释放相关资源， 使得 MBS业务资源能够被充分 利用， 提高了资源利用率。 After the terminal exits the MBS, if there is no terminal in the coverage of the base station where the terminal is located, The MBS, the base station releases the bearer of the MBS, and notifies the serving gateway to which the base station belongs to modify the saved MBS user list. If all the base stations under the serving gateway release the bearer of the MBS, the serving gateway requests the MBS server to register the MBS. Release the appropriate resources. By timely detecting the business requirements, the relevant resources are released in time when there is no service demand, so that the MBS service resources can be fully utilized and the resource utilization rate is improved.
此外，本发明实施例还提供一种多播广播设备，接收判断单元和指示处理 单元， 所述接收判断单元包括： 接收子单元和 /或判断子单元。 其中所述接收 子单元， 用于接收终端退出 MBS的请求； 所述判断子单元， 用于判断终止为 该终端提供服务的条件是否满足； 所述指示处理单元， 用于根据接收到的所述 终端退出 MBS的请求， 或者终止为该终端提供服务的条件满足时， 指示网络 侧密钥管理实体停止为该终端进行 MBS的密钥更新。  In addition, an embodiment of the present invention further provides a multicast broadcast device, a receiving determining unit, and an indication processing unit, where the receiving determining unit includes: a receiving subunit and/or a determining subunit. The receiving subunit, configured to receive a request for the terminal to exit the MBS; the determining subunit, configured to determine whether the condition for terminating the service provided by the terminal is satisfied; the indication processing unit, configured to: according to the received When the terminal exits the MBS request or terminates the condition for providing the service to the terminal, the network side key management entity is instructed to stop performing the MBS key update for the terminal.
优选的， 所多播广播设备还包括：  Preferably, the multicast broadcast device further includes:
修改计费单元， 用于在所述 MBS服务器收到终端退出 MBS的请求或终 止为终端提供服务的条件满足后，修改所述终端的上下文和 /或所述 MBS业务 对应的上下文， 并停止对该终端的 MBS计费。  Modifying the charging unit, configured to modify the context of the terminal and/or the context corresponding to the MBS service after the MBS server receives the request for the terminal to withdraw the MBS or terminate the service for the terminal, and stops The MBS billing of the terminal.
优选的， 若终端是激活态的终端， 则所多播广播设备还包括：  Preferably, if the terminal is an active terminal, the multicast broadcast device further includes:
通知单元， 用于在确认所述终端退出所述 MBS后， 通知所述为该终端提 供 MBS业务的功能实体所述终端已退出该 MBS。  And a notification unit, configured to notify the functional entity that provides the MBS service for the terminal after the terminal exits the MBS, and the terminal has exited the MBS.
若终端是空闲态终端， 则所多播广播设备还包括：  If the terminal is an idle terminal, the multicast broadcast device further includes:
发起单元， 用于在确定所述终端需要退出 MBS时， 向为该终端提供 MBS 业务的功能实体发起所述终端退出该 MBS的请求。  The initiating unit is configured to, when determining that the terminal needs to exit the MBS, initiate a request for the terminal to exit the MBS to a function entity that provides an MBS service for the terminal.
所述为该终端提供 MBS业务的功能实体可以包括： 基站、 服务网关、 锚 点网关、 锚点寻呼控制器和 /或策略功能实体。  The functional entity providing the MBS service for the terminal may include: a base station, a serving gateway, an anchor gateway, an anchor paging controller, and/or a policy function entity.
对于本实施例的具体实现过程详见上述***中对应的实现过程，在此不再 赘述。  For the specific implementation process of this embodiment, refer to the corresponding implementation process in the foregoing system, and details are not described herein again.
虽然通过参照本发明的某些优选实施方式，已经对本发明进行了图示和描 述，但本领域的普通技术人员应该明白，可以在形式上和细节上对其作各种改 变， 而不偏离本发明的精神和范围。  Although the invention has been illustrated and described with reference to the preferred embodiments of the present invention, it will be understood The spirit and scope of the invention.

Claims

权 利 要 求 Rights request
1、 一种微波接入全球互通网络中终端退出多播广播业务的方法， 其特征 在于， 包括：  A method for a terminal to exit a multicast broadcast service in a global access network of a microwave access, characterized in that:
多播广播业务 MBS服务器收到终端退出 MBS的请求或终止为终端提供 服务的条件满足后， 指示网络侧密钥管理实体停止为该终端进行 MBS的密钥 更新。  Multicast Broadcast Service After receiving the request for the terminal to withdraw from the MBS or the condition for terminating the service provided to the terminal, the MBS server instructs the network side key management entity to stop performing the MBS key update for the terminal.
2、 根据权利要求 1所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 所述方法还包括： 在所述 MBS 服务器收到终端退出 MBS的请求或终止为终端提供服务的条件满足后， MBS服务器修改所述终端 的上下文和 /或所述 MBS业务对应的上下文， 并停止对该终端的 MBS计费。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 1, wherein the method further comprises: receiving, at the MBS server, a request for the terminal to exit the MBS or terminating as a terminal After the condition for providing the service is satisfied, the MBS server modifies the context of the terminal and/or the context corresponding to the MBS service, and stops MBS charging for the terminal.
3、 根据权利要求 2所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 所述 MBS服务器收到终端退出 MBS的请求包括： 退 出的 MBS的多播连接标识、 传输连接标识、 业务 ID、 终端 ID、 终端用户地 址转换标识、 业务 ID、 内容标识、 IP多播地址和 /或离开标识。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 2, wherein the request for the MBS server to receive the exit of the MBS by the terminal includes: a multicast connection identifier of the exited MBS, Transport Connection ID, Service ID, Terminal ID, End User Address Translation Identifier, Service ID, Content Identifier, IP Multicast Address, and/or Departure Identifier.
4、 根据权利要求 1所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 若终端是激活态的终端， 所述方法还包括：  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 1, wherein if the terminal is an active terminal, the method further includes:
所述 MBS服务器确认所述终端退出所述 MBS后， 通知所述终端的服务 网关所述终端已退出该 MBS;  After the MBS server confirms that the terminal exits the MBS, it notifies the service gateway of the terminal that the terminal has exited the MBS;
所述服务网关收到终端退出该 MBS的通知后， 还执行以下步骤之一或其 任意组合： 修改所述终端的上下文； 修改所述 MBS业务对应的上下文； 通知 锚点网关修改所述终端的上下文； 通知该终端所在的基站所述终端退出该 MBS;  After receiving the notification that the terminal exits the MBS, the serving gateway performs one of the following steps or any combination thereof: modifying the context of the terminal; modifying a context corresponding to the MBS service; and notifying the anchor gateway to modify the terminal Context; notifying the base station where the terminal is located, the terminal exiting the MBS;
当基站收到所述终端退出该 MBS的通知后， 还执行以下步骤之一或其任 意组合： 修改终端上下文； 修改所述 MBS业务的上下文； 修改对应 MBS的 用户计数，如果修改后的所述用户计数满足预定条件， 则根据该预定条件触发 对应的调整流程。  After receiving the notification that the terminal exits the MBS, the base station performs one of the following steps or any combination thereof: modifying the terminal context; modifying the context of the MBS service; modifying the user count of the corresponding MBS, if the modified When the user count satisfies the predetermined condition, the corresponding adjustment process is triggered according to the predetermined condition.
5、 根据权利要求 4所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 所述终端退出所述 MBS的信息由 MBS服务器或锚点 网关通知所述服务网关。 The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 4, wherein the information that the terminal exits the MBS is notified by the MBS server or the anchor gateway to the service gateway.
6、 根据权利要求 4所述微波接入全球互通网络中终端退出多播广播业务 的方法，其特征在于， 所述根据该预定条件触发对应的调整流程包括以下之一 或其任意组合： The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 4, wherein the triggering the corresponding adjustment process according to the predetermined condition comprises one or any combination of the following:
如果所述 MBS通过点到多点模式承载， 且修改后的所述用户计数小于预 设的第一门限， 则触发所述 MBS用户数目的精确统计， 如果精确统计的用户 数目满足通过点到点模式承载所述 MBS的条件， 则基站将所述 MBS承载调 整为点到点承载模式；  If the MBS is carried in the point-to-multipoint mode, and the modified user count is less than the preset first threshold, the accurate statistics of the number of MBS users are triggered, if the number of accurately counted users meets the point-to-point The mode carries the condition of the MBS, and the base station adjusts the MBS bearer to a point-to-point bearer mode;
如果所述修改后的用户计数为 0，则触发所述 MBS用户数目的精确统计， 如果精确统计出的用户数目同样为 0， 则基站通知其服务网关停止向该基站分 发该 MBS业务数据， 和 /或去除该基站与其服务网关之间的 MBS承载， 和 / 或释放该 MBS对应的空口资源；  If the modified user count is 0, the exact statistics of the number of MBS users is triggered. If the number of accurately counted users is also 0, the base station notifies its serving gateway to stop distributing the MBS service data to the base station, and / or remove the MBS bearer between the base station and its serving gateway, and / or release the air interface resources corresponding to the MBS;
如果所述 MBS通过点到点模式承载 , 则基站释放所述终端对应的空口资 源；  If the MBS is carried in a point-to-point mode, the base station releases the air interface resource corresponding to the terminal;
如果服务网关下属的基站不使用所述 MBS,则该服务网关向 MBS服务器 发起去注册流程， 通知 MBS服务器停止向该服务网关分发该 MBS业务数据， 和 /或释放该 MBS对应的 7|载。  If the base station of the serving gateway does not use the MBS, the service gateway initiates a deregistration process to the MBS server, notifying the MBS server to stop distributing the MBS service data to the service gateway, and/or releasing the corresponding bearer of the MBS.
7、 根据权利要求 6所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 所述服务网关向 MBS服务器释放承载的方式包括拆除 MBS对应的隧道或者离开该 MBS的多播组。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 6, wherein the manner in which the service gateway releases the bearer to the MBS server includes removing the tunnel corresponding to the MBS or leaving the MBS. Multicast group.
8、 根据权利要求 1所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 所述退出 MBS的请求由所述终端通过锚点网关向所述 MBS服务器发出；  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 1, wherein the request for exiting the MBS is sent by the terminal to the MBS server through an anchor gateway;
或由所述终端通过基站和 /或服务网关向所述 MBS服务器发出；  Or issued by the terminal to the MBS server through a base station and/or a service gateway;
或由所述终端通过策略功能实体向所述 MBS服务器发出；  Or issued by the terminal to the MBS server through a policy function entity;
或由所述终端使用应用层信令直接向所述 MBS服务器发出；  Or directly sent to the MBS server by the terminal using application layer signaling;
或由基站、服务网关、锚点网关、锚点寻呼控制器之一或其任意组合代理 所述终端向所述 MBS服务器发出。  Or the proxy is sent to the MBS server by one of a base station, a serving gateway, an anchor gateway, an anchor paging controller, or any combination thereof.
9、 根据权利要求 1所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 所述 MBS服务器从所述终端的服务网关收到所述终端 退出 MBS的请求； 9. The method for a terminal to exit a multicast broadcast service in a microwave access global interworking network according to claim 1, wherein the MBS server receives the terminal from a serving gateway of the terminal Request to opt out of MBS;
所述在接收到终端退出 MBS的请求之前进一步包括： 所述终端、 所述终 端所在基站、所述终端所在锚点网关之一或其任意组合向所述服务网关发送所 述终端退出 MBS的请求。  Before receiving the request for the terminal to exit the MBS, the method further includes: the terminal, the base station where the terminal is located, one of the anchor gateways where the terminal is located, or any combination thereof sends the request for the terminal to exit the MBS to the serving gateway. .
10、根据权利要求 1所述微波接入全球互通网络中终端退出多播广播业务 的方法，其特征在于，所述 MBS服务器在终止为终端提供服务的条件满足后， 至少执行以下步骤之一： 将包括所述终端的信息和对应 MBS信息的消息发送 给服务网关通知该服务网关所述终端需退出该 MBS业务； 修改所述终端的上 下文信息和 /或所述 MBS业务上下文； 停止对该终端的 MBS计费； 网络侧密 钥管理实体停止为该终端进行 MBS的密钥更新。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 1, wherein the MBS server performs at least one of the following steps after the condition for terminating the service provided by the terminal is satisfied: Sending a message including the information of the terminal and the corresponding MBS information to the service gateway to notify the service gateway that the terminal needs to exit the MBS service; modifying the context information of the terminal and/or the MBS service context; stopping the terminal MBS charging; The network side key management entity stops performing key update of the MBS for the terminal.
11、根据权利要求 1所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 如果所述终端为空闲态终端， 所述方法还包括：  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 1, wherein if the terminal is an idle terminal, the method further includes:
在确定所述终端需要退出 MBS时， 向该 MBS业务对应的 MBS服务器发 起所述终端退出该 MBS的请求。  When it is determined that the terminal needs to exit the MBS, the MBS server corresponding to the MBS service initiates a request for the terminal to exit the MBS.
12、 根据权利要求 11所述微波接入全球互通网络中终端退出多播广播业 务的方法， 其特征在于， 锚点寻呼控制器在发现所述空闲态终端退网时， 确定 所述终端需要退出该 MBS。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 11, wherein the anchor paging controller determines that the terminal needs when the idle state terminal is disconnected from the network. Exit the MBS.
13、 根据权利要求 11所述微波接入全球互通网络中终端退出多播广播业 务的方法，其特征在于，锚点寻呼控制器在收到所述空闲态终端退出所述 MBS 业务的请求时， 确定所述终端需要退出 MBS;  13. The method for exiting a multicast broadcast service by a terminal in a microwave access global interworking network according to claim 11, wherein the anchor paging controller receives the request for the idle state terminal to exit the MBS service , determining that the terminal needs to exit the MBS;
所述终端通过基站发送退出所述 MBS业务的请求。  The terminal sends a request to exit the MBS service through the base station.
14、 根据权利要求 11所述微波接入全球互通网络中终端退出多播广播业 务的方法， 其特征在于， 还包括以下步骤： 在所述 MBS服务器确认所述终端 退出所述 MBS业务后， 通知所述锚点寻呼控制器所述终端已退出该 MBS; 所述锚点寻呼控制器收到所述终端退出 MBS的通知后， 进行以下操作之 一或其任意组合： 修改终端上下文； 通过所述基站向所述终端返回业务退出确 认消息； 通知锚点网关修改终端上下文。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 11, further comprising the steps of: after the MBS server confirms that the terminal exits the MBS service, The anchor paging controller has exited the MBS; the anchor paging controller receives one of the following operations or any combination thereof after receiving the notification that the terminal exits the MBS: modifying the terminal context; The base station returns a service exit confirmation message to the terminal; and notifies the anchor gateway to modify the terminal context.
15、根据权利要求 1所述微波接入全球互通网络中终端退出多播广播业务 的方法， 其特征在于， 锚点网关在确定所述终端需要退出 MBS时， 向该 MBS业务对应的 MBS 服务器发起所述终端退出该 MBS的请求。 15. The method for a terminal to exit a multicast broadcast service in a microwave access global interworking network according to claim 1, wherein: When determining that the terminal needs to exit the MBS, the anchor gateway initiates a request for the terminal to exit the MBS to the MBS server corresponding to the MBS service.
16、 根据权利要求 15所述微波接入全球互通网络中终端退出多播广播业 务的方法， 其特征在于， 所述锚点网关在发现所述终端退网时， 确定所述终端 需要退出该 MBS。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to claim 15, wherein the anchor gateway determines that the terminal needs to exit the MBS when the terminal is discovered to be retired. .
17、 根据权利要求 5、 6、 7、 8、 11、 14、 15中任一项所述微波接入全球 互通网络中终端退出多播广播业务的方法， 其特征在于， 所述 MBS服务器通 过 MBS代理与 ASN实体通信， 其中所述 ASN实体包括基站、 服务网关、 锚 点网关、 锚点寻呼控制器和 /或策略功能实体。  The method for the terminal to exit the multicast broadcast service in the microwave access global interworking network according to any one of claims 5, 6, 7, 8, 11, 14, and 15, wherein the MBS server passes the MBS The proxy communicates with an ASN entity, wherein the ASN entity includes a base station, a serving gateway, an anchor gateway, an anchor paging controller, and/or a policy functional entity.
18、 根据权利要求 2、 3、 9、 14中任一项所述微波接入全球互通网络中终 端退出多播广播业务的方法， 其特征在于，  18. The method of terminating a multicast broadcast service in a microwave access global interworking network according to any one of claims 2, 3, 9, and 14, wherein:
所述修改终端上下文的方式为： 将所述的 MBS业务相关信息从所述终端 上下文中删除；  The manner of modifying the terminal context is: deleting the MBS service related information from the terminal context;
所述修改 MBS业务上下文方式为： 将所述的终端相关信息从所述 MBS 业务上下文中删除。  The modifying the MBS service context manner is: deleting the terminal related information from the MBS service context.
19、 一种多播广播***， 包括至少一个用于提供 MBS服务的 MBS服务 器， 以及连接所述 MBS服务器和终端的承载网络， 其特征在于， 所述 MBS 服务器还用于在收到终端退出 MBS的请求或终止为终端提供服务的条件满足 后， 指示网络侧密钥管理实体停止为该终端进行 MBS的密钥更新。  A multicast broadcast system, comprising at least one MBS server for providing an MBS service, and a bearer network connecting the MBS server and the terminal, wherein the MBS server is further configured to exit the MBS at the receiving terminal. After the request or termination of the condition for providing the service to the terminal is satisfied, the network side key management entity is instructed to stop performing the key update of the MBS for the terminal.
20、 根据权利要求 19所述的多播广播***， 其特征在于， 所述承载网络 中包括服务网关；  The multicast broadcast system according to claim 19, wherein the bearer network includes a service gateway;
所述服务网关包括以下单元之一或其任意组合：在收到激活态终端退出该 MBS的通知后， 通知 MBS服务器该终端退出 MBS的单元； 在所述终端退出 MBS后， 修改所述终端的上下文和 /或所述 MBS业务对应的上下文的单元； 在所述终端退出 MBS后， 通知锚点网关修改所述终端的上下文的单元； 在所 述终端退出 MBS后， 通知该终端所在的基站该终端退出 MBS的单元。  The service gateway includes one of the following units or any combination thereof: after receiving the notification that the active terminal terminates the MBS, notifying the MBS server that the terminal exits the MBS unit; after the terminal exits the MBS, modifying the terminal Context and/or a unit of the context corresponding to the MBS service; after the terminal exits the MBS, notifying the anchor gateway to modify the unit of the context of the terminal; after the terminal exits the MBS, notifying the base station where the terminal is located The terminal exits the unit of the MBS.
21、 根据权利要求 19所述的多播广播***， 其特征在于， 所述承载网络 中包括策略功能实体；  The multicast broadcast system according to claim 19, wherein the bearer network includes a policy function entity;
所述策略功能实体包括以下单元之一或其任意组合：在收到激活态终端退 出该 MBS的通知后， 通知 MBS服务器该终端退出 MBS的单元； 在所述终端 退出 MBS后， 通知锚点网关修改所述终端的上下文的单元。 The policy function entity includes one of the following units or any combination thereof: upon receiving the active state terminal retreat After the notification of the MBS, the MBS server is notified that the terminal exits the unit of the MBS; after the terminal exits the MBS, the anchor gateway is notified to modify the unit of the context of the terminal.
22、 根据权利要求 19所述的多播广播***， 其特征在于， 所述承载网络 包括基站；  The multicast broadcast system according to claim 19, wherein the bearer network comprises a base station;
该基站包括以下单元之一或其任意组合：在收到终端退出 MBS的通知后， 修改终端上下文和 /或修改所述 MBS业务上下文的单元；在收到终端退出 MBS 的通知后， 修改对应 MBS的用户计数的单元； 判断修改后的所述用户计数是 否满足预定条件的判断单元； 触发该 MBS承载的调整流程的第一单元； 在所 述判断单元判定修改后的所述用户计数满足预定条件时，所述第一单元触发该 MBS承载的调整流程。  The base station includes one of the following units or any combination thereof: after receiving the notification that the terminal exits the MBS, modifying the terminal context and/or modifying the unit of the MBS service context; after receiving the notification that the terminal exits the MBS, modifying the corresponding MBS a unit of user count; a judgment unit that judges whether the modified user count satisfies a predetermined condition; a first unit that triggers an adjustment process of the MBS bearer; and the determination unit determines that the modified user count satisfies a predetermined condition The first unit triggers an adjustment process of the MBS bearer.
23、 根据权利要求 19所述的多播广播***， 其特征在于， 所述多播广播 ***还包括锚点网关；  The multicast broadcast system according to claim 19, wherein the multicast broadcast system further comprises an anchor gateway;
该锚点网关包括： 在确定所述终端需要退出 MBS后， 通知所述 MBS服 务器和 /或该终端的服务网关该终端退出 MBS 的单元； 和 /或， 在收到终端退 出 MBS的通知后， 修改所述终端上下文的单元。  The anchor gateway includes: after determining that the terminal needs to exit the MBS, notifying the MBS server and/or the service gateway of the terminal that the terminal exits the MBS unit; and/or, after receiving the notification that the terminal exits the MBS, Modify the unit of the terminal context.
24、 根据权利要求 19所述的多播广播***， 其特征在于， 所述多播广播 ***还包括锚点寻呼控制器；  24. The multicast broadcast system of claim 19, wherein the multicast broadcast system further comprises an anchor paging controller;
所述锚点寻呼控制器包括以下单元之一或其任意组合：在确定空闲态终端 需退出 MBS时，向该 MBS业务对应的 MBS服务器发起所述终端退出该 MBS 的请求的单元；在收到终端退出 MBS的通知后，修改所述终端上下文的单元； 在收到终端退出 MBS的通知后， 通知该终端的锚点网关修改所述终端上下文 的单元。  The anchor paging controller includes one of the following units or any combination thereof: when determining that the idle state terminal needs to exit the MBS, the unit that initiates the request for the terminal to exit the MBS is sent to the MBS server corresponding to the MBS service; After the terminal exits the notification of the MBS, the unit of the terminal context is modified; after receiving the notification that the terminal exits the MBS, the anchor gateway of the terminal is notified to modify the unit of the terminal context.
25、 根据权利要求 19中所述的多播广播***， 其特征在于， 所述多播广 播***还包括 MBS代理；  The multicast broadcast system according to claim 19, wherein said multicast broadcast system further comprises an MBS proxy;
所述 MBS代理包括以下单元之一或其任意组合： 用于接收并向 MBS服 务器转发基站、 服务网关、 锚点网关、 锚点寻呼控制器和 /或策略功能实体发 送的 MBS消息的处理单元； 用于将接收到的 MBS服务器下发的 MBS响应消 息转发给基站、 服务网关、 锚点网关、 锚点寻呼控制器和 /或策略功能实体的 处理单元。 The MBS proxy includes one of the following units or any combination thereof: a processing unit for receiving and forwarding MBS messages sent by the base station, the serving gateway, the anchor gateway, the anchor paging controller, and/or the policy function entity to the MBS server The MBS response message sent by the received MBS server is forwarded to a processing unit of the base station, the serving gateway, the anchor gateway, the anchor paging controller, and/or the policy function entity.
26、 一种多播广播设备， 其特征在于， 包括： 接收判断单元和指示处理单 元， 所述接收判断单元包括： 接收子单元和 /或判断子单元， 其中 A multicast broadcast device, comprising: a receiving determining unit and an indication processing unit, wherein the receiving determining unit comprises: a receiving subunit and/or a determining subunit, wherein
所述接收子单元， 用于接收终端退出 MBS的请求；  The receiving subunit is configured to receive a request for the terminal to withdraw from the MBS;
所述判断子单元， 用于判断终止为该终端提供服务的条件是否满足； 所述指示处理单元， 用于根据接收到的所述终端退出 MBS的请求， 或者 终止为该终端提供服务的条件满足时，指示网络侧密钥管理实体停止为该终端 进行 MBS的密钥更新。  The determining subunit is configured to determine whether the condition for terminating the service provided by the terminal is satisfied; the indication processing unit is configured to satisfy, according to the received request that the terminal exits the MBS, or terminate the service for providing the terminal When the network side key management entity is instructed to stop performing key update of the MBS for the terminal.
27、 根据权利要求 26所述的多播广播设备， 其特征在于， 所多播广播设 备还包括：  The multicast broadcast device according to claim 26, wherein the multicast broadcast device further comprises:
修改计费单元， 用于在所述 MBS服务器收到终端退出 MBS的请求或终 止为终端提供服务的条件满足后，修改所述终端的上下文和 /或所述 MBS业务 对应的上下文， 并停止对该终端的 MBS计费。  Modifying the charging unit, configured to modify the context of the terminal and/or the context corresponding to the MBS service after the MBS server receives the request for the terminal to withdraw the MBS or terminate the service for the terminal, and stops The MBS billing of the terminal.
28、 根据权利要求 26所述的多播广播设备， 其特征在于， 若终端是激活 态的终端， 则所多播广播设备还包括：  The multicast broadcast device according to claim 26, wherein, if the terminal is an active terminal, the multicast broadcast device further includes:
通知单元， 用于在确认所述终端退出所述 MBS后， 通知所述为该终端提 供 MBS业务的功能实体所述终端已退出该 MBS。  And a notification unit, configured to notify the functional entity that provides the MBS service for the terminal after the terminal exits the MBS, and the terminal has exited the MBS.
29、 根据权利要求 26所述的多播广播设备， 其特征在于， 若终端是空闲 态终端， 则所多播广播设备还包括：  The multicast broadcast device according to claim 26, wherein, if the terminal is an idle terminal, the multicast broadcast device further includes:
发起单元， 用于在确定所述终端需要退出 MBS时， 向为该终端提供 MBS 业务的功能实体发起所述终端退出该 MBS的请求。  The initiating unit is configured to, when determining that the terminal needs to exit the MBS, initiate a request for the terminal to exit the MBS to a function entity that provides an MBS service for the terminal.
30、根据权利要求 28或 19所述的多播广播设备。 其特征在于， 所述为该 终端提供 MBS业务的功能实体的包括： 基站、 服务网关、 锚点网关、 锚点寻 呼控制器和 /或策略功能实体。  30. A multicast broadcast device according to claim 28 or 19. The function entity that provides the MBS service for the terminal includes: a base station, a service gateway, an anchor gateway, an anchor paging controller, and/or a policy function entity.
PCT/CN2007/070740 2006-09-20 2007-09-20 A method, multicast-broadcast device and system for a terminal terminating multicast-broadcast service WO2008040243A1 (en)

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