CN101150852A

CN101150852A - Method for terminal to exit from multicast and broadcast service and multicast and broadcast system

Info

Publication number: CN101150852A
Application number: CNA2007100048477A
Authority: CN
Inventors: 张伟; 梁文亮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-09-20
Filing date: 2007-02-02
Publication date: 2008-03-26
Anticipated expiration: 2027-02-02
Also published as: CN101150852B

Abstract

The invention relates to the radio communication field, discloses a method of exiting multi-broadcasting services of a mobile terminal and a multi-broadcasting service to make a mobile terminal in a WiMAX network exit the MBS service normally. In the invention, a MBS server receives a request of exiting the MBS or ends the condition of providing services to the terminal, modifies context of the terminal, stops MBS service charge and notifies a network side key management body to stop updating the key of the terminal. If the terminal is activated, after the MBS server affirms the terminal exiting the MBS service, the MBS server or an anchor gateway notifies the serving gateway to exit the information, the serving gateway notifies the base station of the terminal to modify corresponding user counting of MBS, triggers a flow for bearing adjustment when the user counting satifies the predetermined condition. If the base station bears the MBS service through a PTP mode, after the terminal exits the MBS service, releases the gap resource corresponding to the MBS of the terminal.

Description

The method of terminal to exit from multicast broadcasting service and multicast and broadcast system

Technical field

The present invention relates to wireless communication field, particularly the multicast and broadcast technology.

Background technology

Along with the growth of development of Communication Technique and user's request, data service has obtained developing rapidly, and the increasing rapidly of data business volume makes people grow to even greater heights to the demand of communication bandwidth, and broadband access shows a huge market to industrial circle.For breaking through the bandwidth bottleneck of Access Network, people have released multiple broadband access technology.

IEEE802.16 is (the Institute of Electrical andElectronics Engineers of Institute of Electrical and Electronics Engineers, be called for short " IEEE ") in promulgation in December calendar year 2001, the standard that provides last kilometer WiMAX to insert at metropolitan area network is provided.The IEEE802.16 standard mainly comprises 802.16a, 802.16RevD and three standards of 802.16e.

Micro-wave access to global intercommunication (Worldwide Interoperability for Microwave Access, be called for short " WiMAX ") be that present industry is to the wireless MAN access technology based on IEEE 802.16 series standards, its elementary object provides a kind of under some multivendor environment to multiple spot of metropolitan area network, effectively the broadband wireless access means of interoperability.

Specifically, 802.16 series standards have been stipulated the air interface part protocol layer of WiMAX system, mainly comprise physical layer (PHY), and medium access control (Medium Access Control is called for short " MAC ") layer.Wherein, the PHY layer is finished physically to operations such as the modulation of signal and encoding and decoding, and the MAC layer is mainly finished the medium access control function of WiMAX system.

Fig. 1 illustrates the end-to-end reference model of WiMAX.Wherein the R1 interface is a wireless air interface, is mainly defined by IEEE802.16d/e.All the other interfaces are wireline interface.

As can be seen, WiMAX mainly comprises travelling carriage (Mobile Station, be called for short " MS ")/subscriber station (Subscribe Station, abbreviation " SS "), access service network (Access ServiceNetwork, be called for short " ASN ") and connectivity serving network (Connectivity Service Network is called for short " CSN ").

ASN is defined as the network function set that the wireless access service is provided for the WiMAX user terminal, and ASN has comprised BS and ASN gateway (ASN GateWay is called for short " ASN-GW ") network element, and an ASN may be shared by a plurality of CSN.

The major function of ASN comprises the function of BS and the function of ASN-GW.Wherein, the function of BS has: provide that BS is connected with the L2 of subscriber station SS/MS, the compression and the encryption of RRM, measurement and the power control and the data of eating dishes without rice or wine.The function of ASN-GW has: for SS/MS authentication function provides agency (proxy) function; Support the network of NSP to find and selection; For SS provides relaying (Relay) function of L3 information, as IP address assignment.

CSN is defined as to the WiMAX user terminal IP is provided Connection Service.CSN mainly provides the IP address assignment of following function: SS/MS, Internet inserts, checking, mandate, charging protocol (Authentication, Authorization, Account, be called for short " AAA ") agency (proxy) or service (server), authorization control based on the user, ASN is to the tunnel of CSN, WiMAX user's charging and the clearing between the operator, tunnel under the roaming condition between the CSN, switching between the ASN and various WiMAX service (as location-based business, multi-medium multi-packet broadcasting and broadcasting service, IP Multimedia System business).

MS/SS is (moving) terminal, and the user uses this terminal to insert the WiMAX network.

More than WiMAX and network architecture thereof are illustrated, below to Multimedia Broadcast Multicast Service (Multicast﹠amp; Broadcast Service is called for short " MBS ") simply introduce.

Fast development along with Internet (internet), people no longer are satisfied with phone and messaging service to the demand of mobile communication, a large amount of multimedia services emerge, the some of them applied business requires a plurality of users can receive identical data simultaneously, as video request program, television broadcasting, video conference, online education, interactive game etc.On cable network, can adopt internetworking agreement (Internet Protocol at present, abbreviation " IP ") multicast and broadcast technology realize, but these business are transplanted on the mobile network, compare with general data, characteristics such as data volume is big because these business have, longer duration, delay sensitive, and mobile network has particular network structure, functional entity and wave point etc., and existing IP multicast and broadcast technology can not be directly applied for mobile network.

In order to effectively utilize mobile network resource, WiMAX has defined the MBS business, and the MBS business is that the point-to-multipoint service of a data source to a plurality of users send data is provided in the mobile network, realizes that Internet resources are shared, improve utilization rate of network resource, the interface resource of especially eating dishes without rice or wine.The MBS of WiMAX definition can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the multicast and the broadcasting of high-speed multimedia business, and this has complied with the trend of following mobile data development undoubtedly.

In the WiMAX network, by traffic stream identifier (Service Flow Identifier, be called for short " SFID "), identify different one-way traffic flows, identify different connections by CID, all Business Streams transmit in the connection of eating dishes without rice or wine by media interviews control (Medium Access Control is called for short " MAC ") layer, by shining upon, Business Stream is transmitted in the connection of correspondence between the SFID of Business Stream and the CID that the MAC layer is connected.Based on WiMAX network MBS business on the basis of above-mentioned sign, also identifying multicast specially by multicast connection identifier (Multicast CID) connects, identify a multicast service by multicast content sign (MBS Contents ID), a MulicastCID goes up the protocol Data Unit (Protocol Data Unit is called for short " PDU ") that transmits and can comprise one or more MBS business.

In the MBS business, the service flow of some whole world definition can be carried to the broadcast or multicast information of a plurality of terminals, these service flow comprise service quality (Quality of Service, be called for short " QoS ") parameter, in order to improve service security, can encrypt it with the data encryption key of whole world definition.

Two kinds of access modules of MBS business support based on the WiMAX network: single base station is inserted and many base stations are inserted.Under the access module of many base stations, a MBS territory (is MBS Zone, identify with MBS zone ID) in all base stations organize Security Association (MBSGroup Security Association with identical Multicast CID and MBS, be called for short " MBS GSA "), send the content of same MBS Business Stream, the terminal of having registered the MBS service can receive the MBS business datum by a plurality of base stations in this MBS territory, and when the terminal that is in Idle state moves in interior span base station, MBS district, need not rebuild connection, can impregnable reception MBS business, realize the seamless switching of MBS business.

In the prior art, according to the description of agreement 802.16e-2005, can set up MBS by " DSA-REQ "/" DSA-RSP " and connect link and tell the terminal MBS MBS content identification that the territory is broadcast to receive the MBS business datum with indicating terminal.Stipulated also that in addition terminal is when mobile, how to realize the seamless switching of MBS business, as for the MBS business under the access module of many base stations, terminal is except receiving the MBS business datum by a plurality of base stations in this MBS territory, for the terminal that is under the Idle state, in the MBS territory, stride the base station when moving, need not network re-entry and rebuild that MBS is professional to be connected, can impregnable reception MBS business, realize the seamless switching of MBS business.

Yet do not relate to the relevant treatment that to carry out when leaving the MBS business in the 802.16e-2005 agreement.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method and multicast and broadcast system of terminal to exit from multicast broadcasting service, makes that terminal can normally withdraw from the MBS business in the WiMAX network.

For achieving the above object, the invention provides the method for terminal to exit from multicast broadcasting service in a kind of microwave access global intercommunication network, comprise following steps:

After the terminal of receiving Multimedia Broadcast Multicast Service MBS server withdrawed from the request of MBS or terminates as terminal the condition that service is provided and satisfies, network side key management entity stopped to carry out for this terminal the key updating of MBS.

The present invention also provides a kind of multicast and broadcast system, comprise at least one and be used to provide the MBS MBS server of service, and the bearer network that connects MBS server and terminal, described MBS server also is used for after receiving that terminal withdraws from the request of MBS or terminates as terminal the condition that service is provided and satisfies, and indication network side key management entity stops to carry out for this terminal the key updating of MBS.

By relatively finding, the main distinction of technical scheme of the present invention and prior art is, after the terminal of receiving the MBS server withdraws from the request of MBS or terminates as terminal the condition that service is provided and satisfies, the context of terminal and/or the context of relevant MBS business will be revised, stop the MBS service billing, and network side key management entity stops to carry out key updating for this terminal, make terminal initiatively initiate request or passively stop to receive MBS when professional, all can normally withdraw from the MBS business, stop the charging of this MBS business.

Description of drawings

End-to-end reference model in the WiMAX network in prior art during Fig. 1;

Fig. 2 is the method flow diagram that withdraws from MBS according to terminal in the WiMAX network of first embodiment of the invention;

Fig. 3 is the method flow diagram that withdraws from MBS according to terminal in the WiMAX network of second embodiment of the invention;

Fig. 4 is the method flow diagram that withdraws from MBS according to terminal in the WiMAX network of third embodiment of the invention;

Fig. 5 is the method flow diagram that withdraws from MBS according to terminal in the WiMAX network of four embodiment of the invention;

Fig. 6 is the method flow diagram that withdraws from MBS according to terminal in the WiMAX network of fifth embodiment of the invention;

Fig. 7 is the method flow diagram that withdraws from MBS according to terminal in the WiMAX network of sixth embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

After the terminal of receiving the MBS server withdraws from the request of MBS or terminates as terminal the condition that service is provided and satisfies, the context of terminal will be revised, stop the MBS service billing and stop to carry out key updating for this terminal, make terminal initiatively initiate request or passively stop to receive MBS when professional, all can normally withdraw from the MBS business, stop the charging of this MBS business.

Terminal withdraws from the MBS business, and following several possibility is arranged:

1. terminal initiatively withdraws from MBS: may withdraw from flow process thereby cause because under the activated state, the user no longer wishes to receive this MBS, this withdraws from flow process and can initiatively be initiated by the terminal under the activated state; Also may move out the MBS territory of original reception business owing to terminal, thereby trigger terminal withdraws from this MBS, at this moment, this withdraws from flow process and can be initiated by the network side proxy terminal; Also may be that terminal initiated to withdraw from the MBS flow process under the activated state before shutdown; Or the like.

2.MBS the server requirement user withdraws from MBS: Sorry, your ticket has not enough value owing to the prepaid user for possibility; Or the like.

3. the network equipment (as anchor point PC) proxy terminal initiates to withdraw from the MBS business: may be owing to the Idle state terminal closedown, and anchor point PC acts on behalf of this terminal and initiates service deactivation to the MBS server; Or because terminal is striden the MBS territory and moved, as prioritization scheme, base station/gateway can be initiated service deactivation to the MBS server by proxy terminal; Or because terminal abnormal moves back net, anchor gateway/anchor point PC acts on behalf of this terminal and initiates service deactivation to the MBS server; Or the like.

According to inventive principle first embodiment of the invention is described below.First embodiment of the invention relates to the method that terminal in the WiMAX network withdraws from MBS, specifically as shown in Figure 2.Terminal in the present embodiment is the terminal of activated state, provides corresponding M BS by the gateway of terminal for terminal.

When terminal wishes to withdraw from MBS, enter in the step 201, terminal sends the request of leaving MBS by Internet Group Management Protocol (Internet Group Management Protocol is called for short " IGMP ") to anchor gateway, wherein indicates the multicast group address of the MBS that will withdraw from.

Then enter step 202, if handle this message by anchor gateway, after then anchor gateway is received this request, the IGMP data of this request of transmission are transferred to chain of command to be handled, the multicast group address that chain of command will wherein comprise is mapped to concrete MBS, and notify this terminal of gateway at this terminal place will withdraw from certain MBS business, the message content of being notified comprises: contents such as Termination ID, terminal NAI, service ID, content identification, ip multicast address.Also complete IGMP message can be encapsulated in the above-mentioned message and send to gateway.

In step 203, receive the message of step 202 transmission at gateway after, if perhaps by the message in the gateway treatment step 201, discern this message at the gateway data surface, and after transferring to the chain of command processing, gateway is initiated the MBS business to the MBS of correspondence server and is withdrawed from request, the MBS business is withdrawed from the request wherein indicated, message content also comprises: Termination ID (MSID), terminal NAI (MS NAI), traffic ID (Service ID), content identification (Content ID), ip multicast address, leave sign contents such as (LeaveIndicator).Also complete IGMP message can be encapsulated in and send to the MBS server in the above-mentioned message.Make the MBS server can withdraw from terminal and the corresponding MBS of MBS according to the unique definite needs of this message.

Then enter step 204, after the MBS server is received this request, legitimacy to message content is confirmed, after affirmation is legal, the response message that returns success to gateway, and can revise the context and the business contexts of terminal simultaneously, and the MBS that stops this terminal charges and informing network side key management entity stops this terminal is carried out the key updating of MBS.Revising the terminal context promptly refers to this MBS service related information is deleted from the terminal context; Revising business contexts promptly refers to this terminal related information is deleted from business contexts; The implication of hereinafter said modification terminal context, modification business contexts will repeat no more afterwards all with identical herein.

Then enter step 205, after gateway is received this successful response message, use the R6 interface message, send corresponding M BS as RR REQ (resource reservation request) message to the base station of this terminal and withdraw from message, message content comprises the professional corresponding service flow of MSID, this MBS and identifies and withdraw from information such as professional indication.

Then enter step 206, after this message is received in this base station, use the R1 interface message, finish as DSD REQ (dynamic service deletion request) message informing counterpart terminal and withdraw from the MBS flow process, message content comprises the professional corresponding service flow of MSID, this MBS and identifies and withdraw from information such as professional indication.

Then enter step 207, after terminal is received this message, return corresponding message to the base station, as DSDRSP message.If this MBS business is carried by ptp mode in this base station, then in the DSD process, discharge the interface-free resources of this terminal MBS correspondence, avoid interface-free resources by vacant, cause the wasting of resources; If this base station is by this MBS business of PTM mode carrying, then the DSD process only plays announcement, discharges its resource voluntarily by terminal.

Then enter step 208, the base station is then returned to withdraw from accordingly to gateway and is replied, and notification service gateway terminal side has completed successfully withdrawing from of MBS.

Then enter step 209, after gateway is received message, send the MBS exit confirmation to the MBS server then.

Then enter step 210, after the MBS server is received this acknowledge message, return success to gateway and to reply ACK, show and know that this terminal successfully withdraws from MBS, and then the context and the business contexts of modification terminal, and stop the MBS charging of this terminal and the key updating that informing network side key management entity stops this terminal is carried out MBS.By stopping to upgrade the key of MBS business for this terminal, make that terminal can't continue to use this MBS business when the MBS business cipher key changed, guarantee that by this method terminal is stopping this MBS of back termination use that charges.

Owing to before the MBS server stops the MBS of this terminal, passed through multiple Signalling exchange, thereby guaranteed that terminal withdraws from the fail safe of MBS.

Then enter step 211, gateway returns to the base station and withdraws from ACK accordingly, and informing base station MBS server formally stops this terminal and uses MBS and stopped corresponding charging.

Step 209 to step 211 is an optional step, if carried out context revision, charging and key associative operation in step 204, then step 209 to step 211 can be carried out.

Then enter step 212, gateway is after handling the flow process that the user withdraws from MBS, and the notice anchor gateway is revised this user's context, with the MBS service related information deletion of having withdrawed from.

The base station then enters step 213 after eating dishes without rice or wine to finish alternately, terminal context and this MBS business contexts are revised in the base station, and revises the user number counting of this MBS business simultaneously, with user number counting minimizing 1.If this MBS is less than first thresholding with PTM mode carrying and amended user number counting, then trigger the accurate statistics of this MBS number of users, if accurately the number of users of statistics satisfies the condition of carrying this MBS by point-to-point mode, then the bearing mode with this MBS is a ptp mode from the PTM mode switch; If amended user number counting is 0, then trigger the accurate statistics of this MBS number of users equally, if the number of users that counts still is 0, then enter step 214, register flow path is initiated to go to gateway in the base station, the notification service gateway is not distributed this MBS business datum to this base station again, can remove the carrying that this MBS is corresponding between this base station and the gateway simultaneously yet and discharge the corresponding interface-free resources of this MBS (comprising interface-free resources under the ptp mode or the interface-free resources under the PTM pattern).In this step, the user number counting of MBS has identified the terminal number under the activated state of using this MBS, this number can participate in and the flow process that withdraws from this MBS changes according to terminal, because except the activated state terminal, also may exist the terminal of Idle state to use this MBS, and Idle state uses the terminal number of this MBS clearly to identify by user number counting down, therefore it is 0 o'clock at user number counting, also need to carry out the accurate statistics of MBS service-user number, when determining to use this MBS professional without any terminal, just discharge corresponding carrying, under any state, all can normally use MBS to guarantee terminal.In addition, in step 213, if this moment, this MBS service conversation did not begin as yet, the number of users of this MBS also can temporarily only be revised in the base station, when beginning, this MBS selects to trigger the flow process of number of users statistics again according to current number of users, to reduce the possibility that idle work is made in the base station.

If after this base station notification service gateway no longer needs its distributing data, continue to receive this MBS business without any the base station on this gateway, then this moment, this gateway also need not to receive this MBS business again, then enter step 215, this gateway initiates to go register flow path to the MBS server, notify its MBS server not distribute this MBS business datum to this gateway again, also releasing bearing simultaneously, the mode of releasing bearing can be the multicast group of removing the tunnel of this MBS correspondence or leaving this MBS, thereby available resources are used for other business that need.

In the present embodiment, if what provide this MBS for this terminal is the anchor gateway of terminal, then signaling transmission and the operation that replaces gateway to be correlated with by anchor gateway.

Second embodiment of the invention is roughly the same, relates to the method that terminal in the WiMAX network withdraws from MBS equally, specifically as shown in Figure 3.Terminal in the present embodiment also is the terminal of activated state, provides corresponding M BS by the gateway of terminal for terminal.

When terminal wishes to withdraw from the MBS business, enter step 301, terminal is used the R1 interface message, will withdraw from the MBS business as this terminal of DSD REQ message informing base station, carry in the message wish the MBS withdraw from Multicast CID, Traffic CID or/and traffic ID.

Then enter step 302, after DSD REQ is received in the base station, use the R6 interface message, withdraw from MBS as this terminal request of RR REQ message informing gateway, carry equally in the message wish the MBS withdraw from Multicast CID, Traffic CID or/and traffic ID.

Then enter step 303, after gateway is received request, initiate the MBS business to the MBS server and withdraw from request, the MBS business is withdrawed from the request wherein indicated, message content also comprises: Termination ID (MSID), terminal NAI (MS NAI), traffic ID (Service ID), content identification (Content ID), ip multicast address, leave sign contents such as (Leave Indicator).Make the MBS server can withdraw from terminal and the corresponding MBS of MBS according to the unique definite needs of this message.

Then enter step 304, after the MBS server receives that this terminal withdraws from the request of MBS, legitimacy to message content is confirmed, after affirmation is legal, the response message that returns success to gateway, and can revise the context and the MBS business contexts of terminal simultaneously, and the MBS that stops this terminal charges and informing network side key management entity stops this terminal is carried out the key updating of MBS.

Then enter step 305, after gateway is received this successful response message, use corresponding R6 interface message, send MBS as RR RSP message to the base station of this terminal and withdraw from message, message content comprises the professional corresponding service flow of MSID, this MBS and identifies and withdraw from information such as professional indication.

Then enter step 306, after this response message is received in this base station, use corresponding R1 interface message, finish as DSD RSP message informing counterpart terminal and withdraw from the MBS flow process, message content comprises the professional corresponding service flow of MSID, this MBS and identifies and withdraw from information such as professional indication.

Then enter step 307, after terminal is successfully received this message, can optionally return to withdraw to the base station and reply, this terminal of informing base station have confirmed to withdraw from MBS.If this MBS business is carried by ptp mode in this base station, then the base station can discharge the interface-free resources of this terminal MBS correspondence, avoids interface-free resources by vacant, causes the wasting of resources.Then enter step 308.

Step 308 is similar to step 215 to step 315 and step 208, does not repeat them here.

Third embodiment of the invention relates to the method that terminal in the WiMAX network withdraws from MBS, specifically as shown in Figure 4.Terminal in the present embodiment is the terminal of Idle state, and in the present embodiment, the terminal of Idle state can realize withdrawing from of MBS business by existing Location Update (position renewal) flow process.

When the Idle state terminal wishes to withdraw from MBS, enter step 401, this terminal of terminal informing base station will withdraw from MBS, specifically can notify by " Rng_Req " message of expansion.Action Code is Location Update in " Rng_Req " message, terminal adds contents such as MBS service identification and Multicast CID, SFID, Content ID in " Rng_Req " message, can add the sign that withdraws from MBS simultaneously in message.

Then enter step 402, after this message is received in the base station,, pass through request message according to normal Location Update flow process, as " Location Update Req " message informing anchor point PC, can directly notify anchor point PC or notify anchor point PC indirectly by relay PC.Wherein, the contents such as service identification, Multicast CID, SFID, Content ID that comprise the sign that withdraws from MBS and this MBS in should " Location Update Req " message.

Then enter step 403, after anchor point PC receives " Location Update Req " message of base station transmission, according to existing Location Update flow process message is handled, if comprise the sign that withdraws from MBS in the discovery message, then anchor point PC initiates to withdraw from the request of MBS service authorization to this MBS corresponding server, comprises MSID, NAI and corresponding MBS sign in message.

Then enter step 404, the MBS server is authorized after receiving this request accordingly, the MBS server confirm to authorize pass through after, the response message that returns success to anchor point PC.The context and the MBS business contexts of terminal be can also revise simultaneously, and the MBS charging of this terminal and the key updating that informing network side key management entity stops this terminal is carried out MBS stopped.

Then enter step 405, anchor point PC returns response message according to existing Location Update flow process to base station side, and as " Location Update Response ", this message can directly be returned the base station equally or return the base station indirectly by relay PC.The affirmation sign that comprises the MBS sign in the message and terminal is withdrawed from this business.

Then enter step 406, after this " Location Update Response " message is received in the base station, after the legitimacy of " Rng_Req " message that verification terminal sends, by this terminal of " Rng_Rsp " message informing Location Update success of correspondence, show that simultaneously corresponding MBS withdraws from.In this " Rng_Rsp " message, need comprise MBS sign and result's sign.

Then enter step 407, after terminal is successfully received this message, can optionally return corresponding response message to the base station.

Then enter step 408, after this message is received in the base station, return " Location Update Confirm " message according to Location Update flow process to anchor point PC, comprise terminal in the message and withdraw from the sign of MBS and corresponding MBS sign, notice anchor point PC terminal is confirmed successfully withdrawing from MBS.

Then enter step 409, after anchor point PC successfully receives " Location Update Confirm " message, carry out alternately with the MBS server, send exit confirmation to the MBS server, this terminal of notice MBS server withdraws from the MBS business of appointment fully

Then enter step 410, after the MBS server is received this acknowledge message, revise the terminal context and/or revise this MBS business contexts, and stop the MBS charging of this terminal, indication network side key management entity stops this terminal is carried out the key updating of MBS.Return to anchor point PC afterwards and withdraw from ACK.By stopping to upgrade the key of MBS business for this terminal, make that terminal can't continue to use this MBS business when the MBS business cipher key changed, guarantee that by this method terminal is stopping this MBS of back termination use that charges.

Then enter step 411, anchor point PC returns to the base station and withdraws from ACK accordingly, and informing base station MBS server formally stops this terminal and uses MBS and stopped corresponding charging.

Step 409 to step 411 is an optional step, if carried out context revision, charging and key associative operation in step 404, then step 409 to step 411 can be carried out.

Need to prove, after anchor point PC receives that affirmation (LocationUpdate Confirm) message is upgraded in the position of returning the base station, the terminal contextual information that also should notify anchor gateway to revise its preservation.

Four embodiment of the invention relates to the method that terminal in the WiMAX network withdraws from MBS.In the present embodiment, terminal is not initiatively to withdraw from MBS, but when the condition that terminates as terminal and provide service is satisfied, and stops the MBS business of this terminal by the MBS server, specifically as shown in Figure 5.

When the condition that terminates as terminal and provide service is satisfied, enter step 501, the MBS server sends the MBS business and withdraws from indication to the gateway (gateway or anchor gateway) for this terminal carrying MBS.Comprise in the Indication message: terminal and the corresponding MBS of MBS withdrawed from MSID, NAI, MBS service identification, MBS content identification etc., unique definite needs.The MBS server can be revised the context and the MBS business contexts of terminal simultaneously in this step, and the MBS that stops this terminal charges and stops this terminal is carried out the key updating of MBS by network side key management entity.

Then enter step 502, after gateway or anchor gateway are received this message, this message is confirmed according to the user profile of preserving before.And return response message.

Then enter step 503, the MBS server if the MBS server does not carry out related context modification and key, charging associative operation in step 501, then can carry out corresponding operating at this moment after receiving response message.Because network side key management entity stops to be this terminal new key more, and the MBS key updating is still normally carried out, thereby terminal can't continue to use this MBS.In order to force terminal to stop using this MBS immediately, the MBS server can be initiated the flow process of a MBS business cipher key renewal after confirming no longer to provide this MBS for this terminal, makes terminal to continue to use this MBS by original key.

Step 502,503 here is optionally, if do not take place at this moment, can wait until step 508, take place in 509 o'clock.

Then enter step 504, gateway or anchor gateway are used the R6 interface message, can not re-use this MBS business as this terminal of base station of this terminal of RR REQ message informing.Message content comprises the professional corresponding service flow of MSID, this MBS and identifies and withdraw from information such as professional indication.

Then enter step 505, after this notice is received in the base station, use the R1 interface message, withdraw from MBS as DSD REQ message informing counterpart terminal, message content comprises the professional corresponding service flow of MSID, this MBS and identifies and withdraw from information such as professional indication.

Then enter step 506, after terminal is received this message, return corresponding response message, as DSD REP message to the base station.If this MBS business is carried by ptp mode in this base station, then in the DSD process, discharge the interface-free resources of this terminal MBS, avoid interface-free resources by vacant, cause the wasting of resources; If this base station is by this MBS business of PTM mode carrying, then the DSD process only plays announcement, discharges its resource voluntarily by terminal.Then enter step 507.

Step 508,509 is an optional step, if step 502,503 executeds, then this two step needn't carry out; If step 502,503 is not carried out, then need carry out herein, it carries out content and 502,503 consistent.

Step 510 is similar to step 214 to step 513 and step 208, wherein, step 510 to step 511 is optional, be that gateway or anchor gateway can send the MBS exit confirmation to the MBS server, after the ACK that receives the MBS server replys, the notice anchor ASN-GW is revised the terminal context, returns to the base station and withdraws from ACK accordingly; Or gateway or anchor gateway receive reply from withdrawing from of base station after, the notice anchor ASN-GW is revised the terminal context, with this MBS information deletion.

Fifth embodiment of the invention relates to the method that terminal in the WiMAX network withdraws from MBS.Terminal in the present embodiment is the terminal of Idle state, and when terminal exiting network (initiatively move back net, passive move back net or accident is moved back net), anchor point PC replaces the Idle state terminal to initiate to withdraw from the MBS business, specifically as shown in Figure 6 as the agency.

In step 601, anchor point PC finds the Idle state terminal exiting network.The Idle state terminal exiting network can shut down under idle pulley for terminal, through moving back the position updating process (Power Down Location Update) that network mark is known having of a success; Perhaps one of network side aaa server, external agent, anchor point PC or its combination in any trigger this Idle state terminal exiting network; Perhaps anchor point PC finds that this Idle state terminal abnormal falls net.

Then enter step 602, anchor point PC according to the MBS business information of this terminal of being preserved, sends the MBS business to relevant MBS server and withdraws from request after finding this Idle state terminal exiting network, and the MBS business is withdrawed from request.

Then enter step 603, after the MBS server is received this request, revise the context of this terminal and/or the context of this MBS business, and stop the MBS charging of this terminal, informing network side key management entity stops this terminal is carried out the key updating of MBS.Thereby make terminal when shutting down, also can normally withdraw from the MBS business, stop the charging of this business because of accident.

Sixth embodiment of the invention relates to the method that terminal in the WiMAX network withdraws from MBS.Terminal in the present embodiment is the terminal of activated state terminal or Idle state, and when terminal exiting network (initiatively move back net, passive move back net or accident is moved back net), anchor gateway replaces this terminal to initiate to withdraw from the MBS business, specifically as shown in Figure 7 as the agency.

In step 701, anchor gateway is found terminal exiting network.For the activated state terminal, no matter initiatively move back net, passively move back net or accident is moved back net, anchor ASN-GW can receive from gateway or serving BS be used to indicate the user to move back the message of net, this message can be removed registration message for data channel; For the Idle state terminal, no matter initiatively move back net, passively move back net or accident is moved back net, anchor point PC handle move back the net flow process after, can be by this terminal exiting network of anchor point PC notice corresponding anchor gateway.

Then enter step 702, anchor gateway is after finding this terminal exiting network, and according to the MBS business information of this terminal of being preserved, if the MBS business that discovery need be withdrawed from then sends the MBS business to relevant MBS server and withdraws from request, the MBS business is withdrawed from request.

Then enter step 703, after the MBS server is received this request, revise the context of this terminal and/or the context of this MBS business, and stop the MBS charging of this terminal, informing network side key management entity stops this terminal is carried out the key updating of MBS.Thereby make terminal when shutting down, also can normally withdraw from the MBS business, stop the charging of this business because of accident.

Need to prove, the related network elements that relates in the respective embodiments described above is base station, gateway, paging controller and MBS server, but in actual applications, MBS agency (MBSProxy) or other gateways can also be arranged, its concrete operations and base station or gateway are similar, do not repeat them here.

Seventh embodiment of the invention relates to a kind of multicast and broadcast system, comprise at least one in this system and be used to provide the MBS MBS server of service, and the bearer network that connects MBS server and terminal, this MBS server also is used for after receiving that terminal withdraws from the request of MBS or terminates as terminal the condition that service is provided and satisfies, and indication network side key management entity stops to carry out for this terminal the key updating of MBS.By stopping to upgrade the key of MBS business for this terminal, make that terminal can't continue to use this MBS business when the MBS business cipher key changed, guarantee that by this method terminal is stopping this MBS of back termination use that charges.Comprise gateway, anchor gateway, anchor point PC and base station in this bearer network.

Anchor gateway also further comprises one of following or its combination in any: after finding that terminal need withdraw from MBS, when determining terminal exiting network, this terminal of gateway of notice MBS server or this terminal withdraws from the unit of MBS; And/or after receiving that terminal withdraws from the notice of MBS, revise the contextual unit of terminal.

Gateway also further comprises with one of lower unit or its combination in any: after receiving that the activated state terminal withdraws from the notice of this MBS, this terminal of notice MBS server withdraws from the unit of MBS; After terminal withdraws from MBS, revise the context and/or the professional corresponding contextual unit of MBS of terminal; After terminal withdrawed from MBS, the notice anchor gateway was revised the contextual unit of this terminal; After terminal withdraws from MBS, notify this terminal of base station at this terminal place to withdraw from the unit of MBS.

The base station also further comprises with one of lower unit or its combination in any: withdraw from the notice of MBS in terminal after, revise the unit of user's context and/or the unit of this MBS business contexts; After receiving that terminal withdraws from the notice of MBS, revise the unit of the user number counting of corresponding MBS; Judge whether amended user number counting satisfies the judging unit of predetermined condition, trigger the first module of the adjustment flow process of this MBS carrying; When judging unit judged that amended user number counting satisfies predetermined condition, first module triggered the adjustment flow process of this MBS carrying.

Anchor point PC also further comprises with one of lower unit or its combination in any: when finding that the Idle state terminal need withdraw from MBS, when determining the Idle state terminal exiting network, initiate the unit that terminal withdraws from the request of this MBS to the professional corresponding MBS server of this MBS; After receiving that terminal withdraws from the notice of MBS, revise the contextual unit of this terminal; After receiving that terminal withdraws from the notice of MBS, notify the anchor gateway of this terminal to revise the contextual unit of terminal.

By anchor gateway, gateway and anchor point PC, make no matter terminal is under activated state, or under Idle state, no matter be that terminal initiatively wishes to stop the MBS business, or, all can normally withdraw from the MBS business because of the unexpected shutdown of external cause, stop the charging of this business.

Need to prove, more than said each unit be logical block, can in same physical location, realize in actual applications, or be divided into a plurality of physical locations and realize.

Based on above embodiment, when the MBS server receive terminal withdraw from the MBS service request after, when perhaps network side initiatively requires terminal to withdraw from MBS professional qualification to satisfy, guarantee that follow-up terminal can not receive this MBS business, the MBS server has following action:

1) can notify MBS authorization key (MBS Authorization Key, be called for short " MAK ") key management entity, this terminal is deleted from the tabulation of its maintenance, this terminal not upgraded when guaranteeing follow-up MAK key updating; May trigger simultaneously this key management entity and initiate key updating process;

2) can the group of notifications key-encrypting key (Group Key Encryption Key is called for short " GKEK ") key management entity, this terminal is deleted from the tabulation of its maintenance, this terminal is not upgraded when guaranteeing follow-up MAK key updating; May trigger simultaneously this key management entity and initiate key updating process;

3) can notify MBS cryptographic-key used for encrypting group service (MBS Group Traffic EncryptionKey, be called for short " MGTEK ") the key management entity, this terminal is deleted from the tabulation of its maintenance, this terminal is not upgraded when guaranteeing follow-up MAK key updating;

May trigger simultaneously this key management entity and initiate key updating process.

In sum, in each execution mode of the present invention, after the terminal of receiving the MBS server withdraws from the request of MBS or terminates as terminal the condition that service is provided and satisfies, the context of terminal and/or the context of relevant MBS business will be revised, stop the MBS service billing, and network side key management entity stops to carry out key updating for this terminal, make terminal initiatively initiate request or passively stop to receive MBS when professional, all can normally withdraw from the MBS business, stop the charging of this MBS business.

If terminal is the terminal of activated state, then after the MBS server confirms that terminal withdraws from the MBS business, by the direct notification service gateway of MBS server, or by the indirect notification service gateway of anchor gateway this withdraws from information, after impelling gateway to receive that terminal withdraws from the notice of this MBS, revise terminal and professional related context, and the notice anchor gateway is revised the terminal context, and notify this terminal of base station at this terminal place to withdraw from MBS, the base station is revised user's context and/or is revised this MBS business contexts, revise the user number counting of corresponding MBS, and trigger the adjustment flow process of this MBS carrying according to this user number counting.

This adjustment flow process comprises one of following or its combination in any:

If MBS is by the PTM mode carrying, and amended user number counting is less than first thresholding, then trigger the accurate statistics of MBS number of users, if accurately the number of users of statistics satisfies the condition by ptp mode carrying MBS, then the base station is adjusted into PTP with the bearing mode of this MBS by PTM, thereby reduce expending of service resources, improve the utilance of resource;

If amended user number counting is 0, then showing does not currently have the activated state terminal to use this MBS, trigger the accurate statistics of MBS number of users, detect current whether in addition Idle state terminal and use this MBS, if the number of users that accurately counts is similarly 0, then the base station notifies its gateway to stop to this base station distributing data, and can remove the MBS carrying between this base station and its gateway simultaneously and discharge the corresponding interface-free resources of this MBS, avoid resource by vacant, form the wasting of resources;

If MBS carries by ptp mode, then the base station need not to wait until that all with withdrawing from this MBS per family, can discharge the interface-free resources of this terminal correspondence in advance, makes resource in time to be recycled, and improves the utilance of resource;

If MBS is not used in gateway subordinate's base station, then this gateway need initiate to remove register flow path to the MBS server, notifies it to stop playing releasing idling-resource equally to these gateway distribution service data again, avoids the effect of the vacant formation waste of resource.

Withdrawing from the request of MBS business can adopt specific signaling to send to the MBS server indirectly by anchor gateway by terminal according to the characteristics of WiMAX network, or sends to the MBS server indirectly by base station and Service Gateway, and flexibility is higher.

If the MBS server provides the condition triggering terminal of service to withdraw from corresponding MBS business according to terminating as terminal, then at first notify gateway with terminal information and corresponding MBS information, when sending notice or after receiving the response message of gateway, the contextual information and the business contexts of MBS server update terminal terminate as this terminal service are provided.

If state terminal is the Idle state terminal, then pass through the anchor point paging controller (PagingController of terminal, be called for short " PC ") initiate the request that terminal withdraws from this MBS to the professional corresponding MBS server of MBS, terminal can be upgraded by the position in when shutdown and trigger anchor point PC and send the request of withdrawing from the MBS business, also can initiatively withdraw from the MBS business to anchor point PC request by the base station by terminal, anchor point PC initiates the MBS business according to this request to the MBS of correspondence server and withdraws from request.Make that no matter terminal is initiatively to wish to stop this MBS business, or because of the unexpected shutdown of external cause, all can normally withdraw from the MBS business, stops the charging of this business.

The MBS business that withdraws from for the terminal exiting network initiation, can initiate the request that terminal withdraws from this MBS to the professional corresponding MBS server of MBS by the anchor gateway of terminal, for the activated state terminal, no matter initiatively move back net, passively move back net or accident is moved back net, anchor ASN-GW can receive from gateway or serving BS be used to indicate the user to move back the message of net, for the Idle state terminal, no matter initiatively move back net, passively move back net or accident is moved back net, anchor point PC handle move back the net flow process after, can notify the anchor gateway user to move back net.Anchor gateway is initiated the MBS business according to the MBS business information in the terminal context of its maintenance to the MBS of correspondence server and is withdrawed from request.Make terminal in any net scene of moving back, all can normally withdraw from the MBS business, stop the charging of this business.

After terminal withdraws from MBS, if in the coverage of this base station, terminal place endless participate in this MBS, then the base station discharges the carrying of MBS, and notifies the gateway under this base station to revise the MBS user list of being preserved; If gateway has the carrying that all base stations have all discharged MBS under its command, then gateway removes to register MBS to the MBS server requests, discharges respective resources.By business demand is in time detected, when no professional demand, in time discharge related resource, make the MBS service resources to be fully utilized, improved resource utilization.

Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims

1. the method for terminal to exit from multicast broadcasting service in the microwave access global intercommunication network is characterized in that, comprises following steps:

2. the method for terminal to exit from multicast broadcasting service in the microwave access global intercommunication network according to claim 1, it is characterized in that, after the terminal of receiving described MBS server withdraws from the request of MBS or terminates as terminal the condition that service is provided and satisfies, also revise the context and/or the professional corresponding context of described MBS of described terminal, and stop the MBS of this terminal is chargeed.

3. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 1, and described terminal is the terminal of activated state, and described method also comprises following steps:

After described MBS server confirms that described terminal withdraws from described MBS, notify the described terminal of gateway of described terminal to withdraw from this MBS;

After the terminal of receiving described gateway withdraws from the notice of this MBS, also comprise one of following steps or its combination in any: the context of revising described terminal; Revise the professional corresponding context of described MBS; The notice anchor gateway is revised the context of described terminal; Notify the described terminal in base station at this terminal place to withdraw from this MBS.

After described base station receives that described terminal withdraws from the notice of this MBS, also comprise one of following steps or its combination in any: revise the terminal context; Revise the context of described MBS business; Revise the user number counting of corresponding MBS,, then trigger corresponding adjustment flow process according to this predetermined condition if amended described user number counting satisfies predetermined condition.

4. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 3, and described terminal withdraws from the information of described MBS and notifies described gateway by MBS server or anchor gateway.

5. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 3, describedly triggers corresponding adjustment flow process according to this predetermined condition and comprises one of following or its combination in any:

If described MBS carries by point to multipoint mode, and amended described user number counting is less than first thresholding, then trigger the accurate statistics of described MBS number of users, if accurately the number of users of statistics satisfies the condition of carrying described MBS by point-to-point mode, then the base station is adjusted into the point-to-point bearing mode with described MBS carrying;

If described amended user number counting is 0, then trigger the accurate statistics of described MBS number of users, if the number of users that accurately counts is similarly 0, then the base station notifies its gateway to stop to distribute this MBS business datum to this base station, and/or removes the MBS carrying between this base station and its gateway and discharge the corresponding interface-free resources of this MBS;

If described MBS carries by point-to-point mode, then the base station discharges the interface-free resources of described terminal correspondence;

If described MBS is not used in gateway subordinate's base station, then this gateway initiates to go register flow path to the MBS server, and notice MBS server stops to distribute this MBS business datum to this gateway, and/or discharges the carrying of this MBS correspondence.

6. the method for terminal to exit from multicast broadcasting service in the microwave access global intercommunication network according to claim 5, it is characterized in that described gateway is the multicast group of removing the tunnel of MBS correspondence or leaving this MBS to the mode of MBS server releasing bearing.

7. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 1, and the request of the described MBS of withdrawing from is sent to described MBS server by anchor gateway by described terminal;

Or send to described MBS server by base station and/or gateway by described terminal;

Or act on behalf of described terminal by one of base station, gateway, anchor gateway, anchor point paging controller or its combination in any and send to described MBS server.

8. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 1, and described MBS server receives that from the gateway of described terminal described terminal withdraws from the request of MBS;

Described MBS server receives that from the gateway of described terminal described terminal further comprises before withdrawing from the request of MBS: one of described terminal, base station, described terminal place, described terminal place anchor gateway or its combination in any send the request that described terminal withdraws from MBS to described gateway.

9. the method for terminal to exit from multicast broadcasting service in the microwave access global intercommunication network according to claim 1, it is characterized in that, described MBS server is after the condition that terminates as terminal and provide service satisfies, the Indication message that will comprise described terminal information and corresponding MBS information sends to gateway and notifies the described terminal of this gateway need withdraw from this MBS business, and upgrade the contextual information and/or the described MBS business contexts of described terminal, stop the MBS of this terminal is chargeed, network side key management entity stops to carry out for this terminal the key updating of MBS.

10. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 1, if described terminal is the Idle state terminal, then also comprises following steps:

When the anchor point paging controller need withdraw from MBS in definite described terminal, initiate the request that described terminal withdraws from this MBS to the professional corresponding MBS server of this MBS.

11. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 10, described anchor point paging controller determines that described terminal need withdraw from this MBS when finding described Idle state terminal exiting network;

Described anchor point paging controller is determined described Idle state terminal exiting network in one of following situation: described Idle state terminal triggers to comprise moves back more new technological process of position that network mark knows; Or the network side checking authorizes one of charging aaa server, anchor point paging controller, anchor gateway or its combination in any to trigger described Idle state terminal exiting network.

12. the method for terminal to exit from multicast broadcasting service in the microwave access global intercommunication network according to claim 10, it is characterized in that, described anchor point paging controller receive that described Idle state terminal sends withdraw from the request of described MBS business the time, determine that described terminal need withdraw from MBS;

Described base station sends the described request of withdrawing from described MBS business by the base station.

13. the method for terminal to exit from multicast broadcasting service in the microwave access global intercommunication network according to claim 10, it is characterized in that, also comprise following steps: after described MBS server confirms that described terminal withdraws from described MBS business, notify the described terminal of described anchor point paging controller to withdraw from this MBS;

After described anchor point paging controller receives that described terminal withdraws from the notice of MBS, carry out one of following operation or its combination in any: revise the terminal context; Return professional exit confirmation message by described base station to described terminal; The notice anchor gateway is revised the terminal context.

14. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 1,

When anchor gateway need withdraw from MBS in definite described terminal, initiate the request that described terminal withdraws from this MBS to the professional corresponding MBS server of this MBS.

15. the method for terminal to exit from multicast broadcasting service is characterized in that in the microwave access global intercommunication network according to claim 14, described anchor gateway determines that described terminal need withdraw from this MBS when finding described terminal exiting network;

Described anchor gateway is determined described terminal exiting network in one of following situation: described terminal triggers under activated state or Idle state and moves back the net flow process; Or one of network side aaa server, anchor point paging controller, home agent, external agent or its combination in any trigger described terminal exiting network.

16. the method according to terminal to exit from multicast broadcasting service in each described microwave access global intercommunication network in the claim 2,3,9,13 is characterized in that,

Revise described terminal context in the following manner: described MBS service related information is deleted from described terminal context;

Revise described MBS business contexts in the following manner: described terminal related information is deleted from described MBS business contexts.

17. multicast and broadcast system, comprise at least one and be used to provide the MBS MBS server of service, and the bearer network that connects MBS server and terminal, it is characterized in that, described MBS server also is used for after receiving that terminal withdraws from the request of MBS or terminates as terminal the condition that service is provided and satisfies, and indication network side key management entity stops to carry out for this terminal the key updating of MBS.

18. multicast and broadcast system according to claim 17 is characterized in that, comprises gateway in the described bearer network;

Described gateway further comprises with one of lower unit or its combination in any: after receiving that the activated state terminal withdraws from the notice of this MBS, this terminal of notice MBS server withdraws from the unit of MBS; After described terminal withdraws from MBS, revise the context and/or the professional corresponding contextual unit of described MBS of described terminal; After described terminal withdrawed from MBS, the notice anchor gateway was revised the contextual unit of described terminal; After described terminal withdraws from MBS, notify this terminal of base station at this terminal place to withdraw from the unit of MBS.

19. multicast and broadcast system according to claim 17 is characterized in that, described bearer network also comprises the base station;

This base station further comprises with one of lower unit or its combination in any: after receiving that terminal withdraws from the notice of MBS, revise the terminal context and/or revise the unit of described MBS business contexts; After receiving that terminal withdraws from the notice of MBS, revise the unit of the user number counting of corresponding MBS; Judge whether amended described user number counting satisfies the judging unit of predetermined condition; Trigger the first module of the adjustment flow process of this MBS carrying; When described judging unit judged that amended described user number counting satisfies predetermined condition, described first module triggered the adjustment flow process of this MBS carrying.

20. multicast and broadcast system according to claim 17 is characterized in that, described multicast and broadcast system also comprises anchor gateway;

This anchor gateway further comprises: after definite described terminal need withdraw from MBS, notify this terminal of gateway of described MBS server and/or this terminal to withdraw from the unit of MBS; And/or, after receiving that terminal withdraws from the notice of MBS, revise the contextual unit of described terminal.

21. multicast and broadcast system according to claim 17 is characterized in that, described multicast and broadcast system also comprises the anchor point paging controller;

Described anchor point paging controller further comprises with one of lower unit or its combination in any: when definite Idle state terminal need withdraw from MBS, initiate the unit that described terminal withdraws from the request of this MBS to the professional corresponding MBS server of this MBS; After receiving that terminal withdraws from the notice of MBS, revise the contextual unit of described terminal; After receiving that terminal withdraws from the notice of MBS, notify the anchor gateway of this terminal to revise the contextual unit of described terminal.

22. according to any one described multicast and broadcast system in the claim 18 to 21, it is characterized in that,

The contextual unit of described modification terminal is revised the terminal context in the following manner: described MBS service related information is deleted from described terminal context;

The unit of described modification MBS business contexts is revised described MBS business contexts in the following manner: described terminal related information is deleted from described MBS business contexts.