CN101674526B - MBS mobile management method and terminal MBS-switching method - Google Patents
MBS mobile management method and terminal MBS-switching method Download PDFInfo
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Abstract
The invention discloses an MBS mobile management method and a terminal MBS-switching method. The terminal MBS-switching method comprises the following steps: a service base station and a service MBS proxy are crossed to acquire a list of base stations capable of continuously supporting a multicast broadcasting service presently transmitted by a terminal and inform the terminal of the base station list; a target base station selected by the terminal informs the terminal to continuously receive parameters needed by the same multicast broadcasting service in a target MBS region; and the terminal receives the multicast broadcasting service according to the parameters. The invention defines the signaling interaction between a defined network side and terminals and between functional entities at the network side, effectively switches the multicast broadcasting services of the terminals, solves the problem of applying a switching scheme of a unicast technology to multicast broadcasting switching in related technologies and problems caused by the same and fills the gaps of the related technologies.
Description
Technical field
The present invention relates to the communications field, and especially, relate to the changing method of the motion management method of a kind of multicast broadcast service (Multicast Broadcast Service, referred to as MBS) and the multicast broadcast service of terminal.
Background technology
At micro-wave access to global intercommunication (Worldwide Interoperability for MicrowaveAccess, referred to as WiMAX) define multicast broadcast service in system, multicast broadcast service is divided into two types, that is, broadcast/static multicast and dynamic multicast.Wherein, the Access Network carrying of broadcast or static multicast and airlink are set up in whole broadcast service zone or multicast service area simultaneously, and under not considering coverage, whether certain base station has user at receiving multicast and broadcast service; Dynamic multicast is then only have when there being user's receiving multicast and broadcast service under certain base station in multicast broadcast service region, just can set up the Access Network relevant to this base station and carry and airlink.
In actual applications, no matter adopt the multicast broadcast service of broadcast/static multicast or adopt the multicast broadcast service of dynamic multicast, when terminal moves in multicast broadcast service region, all need to ensure that terminal can receiving multicast and broadcast service, this needs mutually to coordinate between each network element of network side, that is, the handling process of switching is completed.
Although define the Access Network handoff procedure of clean culture in WiMAX system, this handoff procedure well can not be applicable to multicast broadcast service.And the Access Network of multicast broadcast service is switched, at present effective solution is not yet proposed.
In addition, in current WiMAX technology, there are two kinds of business, that is, unicast service and multicast service, in actual applications, no matter be unicast service or multicast service, all there is the possibility switched, and this handoff technique need to obtain the support of air interface and the support of network side.In current WiMAX technology, unicast service is switched, air interface and network side support comparatively perfect, but for multicast, except air interface can be supported, lack supporting network side and support scheme.
The multicast broadcast service defined in current WiMAX is mainly divided into two types, that is, broadcast/static multicast and dynamic multicast.Wherein, the Access Network carrying of broadcast/static multicast and airlink are all set up in whole broadcast service zone or multicast service area simultaneously, and under not considering region, whether certain base station has user at receiving multicast and broadcast service; And for dynamic multicast, then, when only having user's receiving multicast and broadcast service under certain base station in multicast broadcast service region, just can set up the Access Network relevant to this base station and carry and airlink.
In addition, WiMAX defines multicast and broadcast transmission region (MBS TransmissionZone) and multicast and broadcast region (MBS Zone) two concepts.In MBS Zone, all base stations adopt same set of air interface parameters (MCIDs (LCIDs), SAIDs) for transmitting identical MBS business, and terminal can utilize these air interface parameters to carry out receiving multicast and broadcast service.MBS Transmission Zone may comprise multiple MBS Zone, these air interface parameters may partly or entirely change, therefore, if need terminal to receive identical MBS business at different MBS Zone, then different air interface parameters may be adopted.
When terminal moves to another one MBS Zone (being called Target MBS Zone or New MBS Zone) from a MBS Zone (being called Serving MBS Zone or CurrentMBS Zone), if terminal expects the continuity keeping MBS business, namely the MS air interface parameters that needs to obtain current MBS Zone is in value corresponding to target MBS Zone, and so terminal could continue receiving multicast and broadcast service at Targets MBS Zone.
Usually, switching can be divided into two stages, that is, handoff preparation phase and handover execution stage, when terminal select a candidate base station as the target BS switched before, inner mutual of the mutual and network side of this terminal and network side base station all belongs to handoff preparation phase; Terminal is selected a candidate base station and is all belonged to handover execution stage as the mutual of the terminal after target BS and network side base station and inner mutual of network side.In handover execution stage, if terminal switches to the candidate base station that does not belong in handoff preparation phase, then belong to uncontrolled switching/unpredictable switching.
In order to provide the support switched unicast service, each BS safeguards the information of neighbor base station around, and the information spinner of these adjacent base stations is wanted to comprise: adjoining base station mark, adjoining base station physical parameter, MBS Zone ID belonging to adjoining base station.For supporting the switching of MBS business, the BS in MBS Zone can increase the following information of maintenance: the multicast broadcast service stream information that this MBS Zone supports; Adjacent with this MBS Zone and support the adjacent MBS Zone list of same MBS business.
Switch for unicast service, each serving BS safeguards the information of the unicast service stream of its MS served; For the switching of group business stream, each serving BS needs to increase the multicast service stream information safeguarding that each terminal receives.
Like this, providing support to switch MBS, needing the multicast service stream information by terminal receives to transfer to target BS.But to same multicast broadcast service, the traffic stream identifier (MSID, SFID) of each terminal maintenance may be not identical, and therefore, the switching flow of unicast service stream can not solve the switching problem of multicast service.At present, how by overall identification, multicast broadcast service represented when different MBS Zone switches for terminal and how to select to support the target BS of multicast broadcast service, not yet proposing effective solution at present.
Summary of the invention
Consider in correlation technique and can not effectively realize the problem of the switching of the multicast broadcast service of terminal and make the present invention, for this reason, main purpose of the present invention is the handover mechanism providing a kind of mobility management mechanism of multicast broadcast service and the multicast broadcast service of terminal.
According to an aspect of the present invention, a kind of motion management method of multicast broadcast service is provided.
Motion management method according to multicast broadcast service of the present invention comprises: serving BS and service MBS agency alternately, obtain the station list that can continue the multicast broadcast service of support terminal current transmission, and station list is informed to terminal; The parameter of target BS notification terminal needed for target MBS region relaying continued access receipts same multicast broadcasting service that terminal is chosen; Terminal carries out the reception of multicast broadcast service according to parameter.
Wherein, serving BS knows that the process of candidate base station is: the target BS list that terminal will switch to serving base stations report; Or serving BS according to itself in advance from the list one of at least selecting the target BS that will switch the following information that terminal or adjacent base station obtain: the load of neighbor base station radio environment information, serving BS and neighbor base station.
In addition, serving BS and service MBS act on behalf ofs and to carry out alternately and the process obtaining station list is specially: candidate list of base stations notification service MBS acts on behalf of by serving BS; Service MBS agency picks out the station list that can continue support terminal reception same multicast broadcasting service and returns to serving BS from the station list of notice.
And, the processing procedure that service MBS agency selects station list is: each target BS in the target BS list that service MBS proxy lookups receives, judge in the one or more target MBS regions belonging to target BS, whether there is a target MBS region and the service MBS region belonging to the serving BS of terminal current place is same MBS transmission region, or whether transmits identical multicast broadcast service; If the judgment is Yes, after then showing that terminal switch arrives this target BS, can receive former multicast broadcast service by target MBS region continuous belonging to target BS, and service MBS agency thinks that this target BS is to continue the base station that support terminal receives identical multicast broadcast service.
Wherein, after service MBS agency determines station list, the method can comprise further: service MBS agency acts on behalf of with the target MBS of target BS and carries out interacting message, obtain the multicast broadcast service of the current reception of terminal at the corresponding relation of serving MBS region and the interregional MBS region parameter of target MBS, and corresponding relation is sent to serving BS.
In addition, after serving BS obtains corresponding relation, the method can comprise further: corresponding relation is informed to terminal by serving BS.
Preferably, the method can comprise further: service MBS agency or serving BS screen target BS, are stored in station list by the target BS after screening.
In addition, after the target BS notification service base station that terminal is chosen, this target BS notification service MBS acts on behalf of by serving BS, and the multicast broadcast service that this TBS and terminal receive by service MBS agency is acted on behalf of at the MBS region parameter notification target MBS in service MBS region;
Target MBS agency then by the MBS region parameter needed for the multicast broadcast service of current for terminal reception target MBS regional service and target MBS interregional corresponding relation notice TBS.
And, when serving MBS agency and being identical with target MBS agency, in terminal by after a target BS notification service base station choosing, this target BS notification service MBS agency/target MBS acts on behalf of by serving BS, and the MBS region parameter needed for the multicast broadcast service of current for terminal reception is being served MBS region and the interregional corresponding relation of target MBS informs to target BS by service MBS agency/target MBS agency.
According to a further aspect in the invention, a kind of motion management method of multicast broadcast service is provided.
Motion management method according to multicast broadcast service of the present invention comprises: terminal will initiate distance measurement request message to target BS, wherein, with the mark of serving BS in distance measurement request message; Change if target BS and Current Serving BTS belong to the parameter that different multicast and broadcast regions or terminal receive required for same multicast broadcast service, then target BS needs notification terminal to continue the parameter needed for receiving multicast and broadcast service at target MBS region relaying; Terminal carries out the reception of multicast broadcast service according to new parameter.
Wherein, target BS is by obtaining the current receiving multicast and broadcast service of terminal alternately at the service MBS region parameter in MBS region and/or the multicast broadcast service stream information of terminal with serving BS.
Particularly, target BS can comprise from the process of the multicast broadcast service stream information of terminal Current Serving BTS acquisition terminal:
Target BS sends context request message to serving BS; The multicast broadcast service stream information of the multicast broadcast service of current for terminal reception is sent to target BS by context request response message by serving BS.
Wherein, the multicast broadcast service stream information of terminal can comprise following one of at least: traffic stream identifier, multicast and broadcast area identification, multicast and broadcast transmission region mark, grouped data traffic identifier, business continuance require instruction, multicast and broadcast connection identifier.
Further, in multicast broadcast service stream information, using multicast and broadcast transmission region mark as the first mark, using grouped data traffic identifier as the second mark, the first mark and/or the second mark for marking or index-group multicast broadcasting service stream is utilized.
In addition, the method can comprise further: target BS obtains multicast broadcast service that terminal receives at the corresponding relation of serving MBS region and the interregional MBS region parameter of target MBS alternately by acting on behalf of with target MBS.
And, the process obtaining corresponding relation specifically comprises: target BS and serving BS carry out alternately, and serving BS and service MBS agency carry out mutual, obtain multicast broadcast service that terminal the receives corresponding relation in service MBS region and the interregional MBS region parameter of target MBS.
Preferably, above-mentioned MBS region parameter comprise following one of at least: MBS area identification, multicast broadcast service mark, multicast broadcast service stream information, MBS agent identification, MBS isochronous controller mark, grappling MBS data channel mark, MBS service strategy; Wherein, multicast broadcast service stream information comprise following one of at least: the grader of multicast broadcast service traffic identifier, air interface Connecting quantity, security association mark SAIDs, multicast broadcast service stream, further, air interface Connecting quantity comprises MCIDs or MCIDs and LCIDs.
Wherein, multicast broadcast service mark can in the following way in one of at least represent: multicast broadcast service mark, multicast and broadcast service program mark, multicast broadcast service channel labelling, multicast broadcast service multicast and broadcast IP address, multicast broadcast service multicast and broadcast IP address and port numbers, multicast broadcast service traffic identifier etc. identify.
According to a further aspect in the invention, a kind of changing method of multicast broadcast service of terminal is provided.
Changing method according to the multicast broadcast service of terminal of the present invention comprises:
The serving BS of terminal preserves the multicast broadcast service stream information of terminal reception;
The multicast broadcast service stream information of terminal is passed to the target BS of switching by serving BS by message.
Multicast broadcast service stream information comprise following one of at least: traffic stream identifier, multicast and broadcast area identification, multicast and broadcast transmission region mark, grouped data traffic identifier, business continuance require instruction, multicast and broadcast connection identifier.
Preferably, can using the multicast and broadcast transmission region mark in multicast broadcast service stream as the first mark, using the grouped data traffic identifier in multicast broadcast service stream as the second mark, and by the first mark and/or the second mark for marking or index-group multicast broadcasting service stream.
When target BS and serving BS belong to different multicast and broadcast region, after the multicast broadcast service stream information that target BS receives from serving BS, comprise further: target BS continues parameter needed for receiving multicast and broadcast service according to multicast broadcast service stream information determination terminal at target multicast and broadcast region relaying, and parameter is sent to terminal; Terminal is according to the parameter receiving multicast and broadcast service from target BS.
Further, target BS send to the parameter of terminal can comprise following one of at least: the multicast broadcast service stream information parameter that after traffic stream identifier, multicast and broadcast area identification, multicast and broadcast connection identifier, multicast and broadcast area change, other changes.
On the one hand, when switching is initiated by terminal, the process that multicast broadcast service stream information is informed to the target BS of switching by serving BS comprises:
The preparatory stage switched, serving BS receives the handover request message of self terminal, and select in the base station of carrying from handover request message to support that the base station of multicast broadcast service is as target BS, and by multicast broadcast service stream information by handover request message informing to the target BS selected.
Wherein, when serving BS judges that terminal sends to the base station of carrying in the handover request message of serving BS all not support multicast broadcast service, comprise further:
Serving BS sends switching response message to terminal, and in switching response message, carry this instruction switched of refusal; Or when described terminal receives described multicast broadcast service and unicast service simultaneously, described serving BS determines whether according to the priority of local policy and/or described multicast broadcast service and described unicast service the switching refusing described terminal.
Preferably, switching response message can further include the base station of the support multicast broadcast service that serving BS is recommended.
On the other hand, switch when being initiated by network side, the process that multicast broadcast service stream information is informed to the target BS of switching by serving BS comprises:
The preparatory stage switched, serving BS selects to support the target BS of multicast broadcast service, and by target BS that the multicast broadcast service stream information of terminal is selected to network side by handover request message informing.
The execution phase switched, serving BS receives the switch indicating information of self terminal, obtains the target BS of switching, and the multicast broadcast service stream information of terminal is informed to target BS by switching authentic information from switch indicating information.
In addition, when carry out switch to uncontrollable or unpredictable switching, the process that the multicast broadcast service stream information of terminal informs to target BS comprises by serving BS:
Target BS sends context request message to serving BS;
The multicast broadcast service stream information of terminal is included in context request response message and sends to target BS by serving BS.
After target BS becomes the new serving BS of terminal, the multicast broadcast service stream information of the terminal that new serving BS is preserved.
By means of technique scheme of the present invention one of at least, by the Signalling exchange in the middle of define grid side and terminal and network side between functional entity, and identified group multicast broadcasting service uniquely, the switching of the multicast broadcast service of terminal can be have effectively achieved, avoid in correlation technique the problem handover scheme of unicast technique being applied to multicast and broadcast and switching and cause thus, fill up the blank of correlation technique.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process chart of motion management method in situation one according to the multicast broadcast service of the embodiment of the present invention;
Fig. 2 is the processing signaling flow chart by handoff preparation phase when end side initiation switching in situation one;
Fig. 3 is the processing signaling flow chart by handoff preparation phase when network side initiation switching in situation one;
Fig. 4 is the processing signaling flow chart of handover execution stage in situation one;
Fig. 5 is the process chart of motion management method in situation two according to the multicast broadcast service of the embodiment of the present invention;
Fig. 6 is the processing signaling flow chart by handoff preparation phase when end side initiation switching in situation two;
Fig. 7 is the processing signaling flow chart by handoff preparation phase when network side initiation switching in situation two;
Fig. 8 is the processing signaling flow chart of handover execution stage in situation two;
Fig. 9 is the process chart of motion management method in situation three according to the multicast broadcast service of the embodiment of the present invention;
Figure 10 is the process chart of motion management method in situation three according to the multicast broadcast service of the embodiment of the present invention;
Figure 11 is uncontrolled serving BS and target BS mutual signaling process figure when switching in the motion management method according to the multicast broadcast service of the embodiment of the present invention;
Figure 12 is the flow chart of the changing method of the multicast broadcast service of terminal according to the embodiment of the present invention;
Figure 13 is the flow chart determining target BS in the changing method of the multicast broadcast service of terminal according to the embodiment of the present invention;
Figure 14 is initiated to switch by network side in the changing method of the multicast broadcast service of terminal according to the embodiment of the present invention and the signaling process figure of multicast broadcast service stream information in handoff preparation phase transmitting terminal;
Figure 15 is the signaling process figure at the multicast broadcast service stream information of handover execution stage transmitting terminal in the changing method of the multicast broadcast service of terminal according to the embodiment of the present invention.
Embodiment
Functional overview
The reciprocal process that the present invention is acted on behalf of by the mutual and network side base station and MBS having redefined network side and terminal, achieves the switching of Access Network, reaches the object of mobile management when broadcast or static multicast business.
Multicast and broadcast transmission region (MBS Transmission Zone) and multicast and broadcast region (MBS Zone) two concepts are defined at WiMAX.All base stations in MBS Zone adopt a set of identical air interface parameters, and (comprise MCIDs (LCIDs) and/or SAIDs) be used for transmitting identical multicast broadcast service (MBS business), terminal can carry out receiving multicast and broadcast service by these air interface parameters.
A MBS Transmission Zone may comprise multiple MBS Zone, and between the different MBS Zone of same MBS Transmission Zone, these air interface parameters may partly or entirely change.Therefore, when terminal receives identical MBS business at different MBS Zone, different air interface parameters may be adopted; When terminal moves to another one MBS Zone (being called target MBS region (Target MBS Zone) or new MBS region (New MBS Zone)) from a MBS Zone (being called service MBS region (Serving MBS Zone) or current MBS region (Current MBS Zone)), the air interface parameters needing to obtain current MBS Zone is in value corresponding to target MBS Zone, and such terminal could continue receiving multicast and broadcast service by Target MBS Zone.
Each MBS Zone has a corresponding MBS to act on behalf of (MBS Proxy), grappling MBS data channel (Anchor MBS DP) and MBS isochronous controller (MBSSync Controller), and different MBS Zone can share a MBS Proxy in same MBS Transmission Zone, Anchor MBS DP and MBS SyncController.
MBS agency (MBS Proxy) is in charge of and safeguards the MBS region parameter (MBS Zone Parameter) of each MBS Zone, MBS Zone Parameter comprise in following parameter information one of at least: MBS Zone ID, multicast broadcast service identifies, multicast broadcast service stream information, MBS Proxy ID, MBS Sync Controller ID, Anchor MBS DP ID, MBS Service Policy etc.; And multicast broadcast service stream information comprise following parameter one of at least: multicast broadcast service traffic identifier MSFIDs, air interface parameters (comprising MCIDs, LCIDs), security association mark SAIDs, the grader of multicast broadcast service stream.
Wherein, multicast broadcast service mark can adopt one of at least following expression: multicast broadcast service mark (MBS Service ID), multicast and broadcast service program mark (MCBCSProgram ID), multicast broadcast service channel labelling (MCBCS Channel ID), multicast broadcast service multicast and broadcast IP address (Broadcast or Multicast IP Address), multicast broadcast service multicast and broadcast IP address and port numbers (Broadcast and MulticastIP/Port Number), multicast broadcast service traffic identifier etc. identifies.
MBS Sync Controller is responsible for grand diversity or frame synchronization in MBS Zone and realizes; And the frame synchronization between MBS Zone realizes;
The packet received from CSN (Core Service Network, core net) can be sent in MBS Zone by data channel or base station in MBSTransmission Zone by Anchor MBS DP.
The present invention will be described in detail below based on above-mentioned network configuration.
The embodiment provides a kind of mobility management systems of multicast broadcast service, comprise serving BS (SBS), target BS (TBS), service MBS agency (Serving MBS Proxy) belonging to SBS, the target MBS belonging to TBS agency (Target MBSProxy).
In the following description, switching is divided into two stages, that is, handoff preparation phase and handover execution stage; Select a candidate base station when terminal and all belong to handoff preparation phase as inner mutual of the mutual and network side of the terminal before the TBS switched and network side base station; Terminal is selected a candidate base station and is all belonged to handover execution stage as the mutual of the terminal after TBS and network side base station and inner mutual of network side.And in handover execution stage, if terminal switches to the candidate base station that does not belong in handoff preparation phase, then belong to uncontrolled switching.Based on above-mentioned network configuration, the motion management method of the multicast broadcast service according to the embodiment of the present invention will be described in detail below.
Wherein, serving BS is used for carrying out alternately with Serving MBS Proxy, can continue the target BS list notification of the multicast broadcast service of support terminal current transmission to terminal;
Afterwards, when terminal selectes certain candidate TBS as final TBS, this TBS notification terminal continues and receives and the parameter needed for multicast broadcast service in target MBS region.
Serving BS knows that the process of candidate base station is: the target BS list that terminal will switch to serving base stations report; Or serving BS according to itself in advance from the list one of at least selecting the target BS that will switch the following information that terminal or adjacent base station obtain: the load of neighbor base station radio environment information, serving BS and neighbor base station.
Particularly, when Serving MBS Proxy is different MBS Proxy from Target MBS Proxy, Serving MBS Proxy, for receiving the handover request message from SBS, checks in the Target MBS Zone in the list of TBS belonging to TBS, whether (TBS can belong to multiple Target MBS Zone) has the Target MBS Zone belonging to same MCBCS Transmission Zone with Serving MBS Zone to exist; If existed, then show that terminal switch can continue to receive same MBS business to this TBS, Serving MBS Proxy searches this TargetMBS Proxy corresponding to Target MBS Zone, and the MBS Zone Parameter update request message of carrying service MBS ZoneParameter is sent to Target MBS Proxy, wherein, the MBS Zone Parameters of terminal at Serving MBS Zone is carried in handover request message;
Target MBS Proxy, according to the MBS ZoneParameters in Serving MBS Zone, obtains this multicast broadcast service at MBSZone Parameters corresponding to Target MBS Zone.
Target MBS Proxy sends to Serving MBS Proxy by MBS Zone Parameters Update Rsp message the corresponding relation band of the multicast broadcast service of current for terminal reception between Target MBS Zone and ServingMBS Zone; This corresponding relation is being issued SBS by HO RSP message by ServingMBS Proxy;
SBS selects the station list notification terminal that can continue support terminal MBS business; SBS also can bring terminal the Target MBS Zone belonging to each TBS and the relation between current Serving MBS Zone between MBS Zone Parameters parameter;
If SBS only needs to select the station list (not belonging to the station list of current Serving MBS Zone) that can continue support terminal MBS business and does not need the Target MBS Zone belonging to each TBS and the relation between current Serving MBS Zone between MBS Zone Parameters parameter to bring terminal, then do not need interacting message between above-mentioned Serving MBS Proxy and TargetMBS Proxy for the process of the relation between MBS Zone Parameters between Serving MBS Zone and Target MBS Zone of the MBS business that obtains present terminal and receive, do not need to bring serving BS by message by these relations yet.
Serving MBS Proxy searches each TBS received in TBS list, judge in the one or more Target MBS Zone belonging to TBS, whether there is a Target MBSZone and the Serving MBS Zone belonging to the SBS of present terminal place is same Transmission Zone, or whether transmit identical MBS business; If the judgment is Yes, after then showing that terminal switch arrives this TBS, can continue and receive former MBS business by Target MBS Zone belonging to TBS, and Serving MBS Proxy thinks that this TBS can continue the base station that support terminal receives identical multicast broadcast service.And afterwards the station list determined will returned to SBS.
After terminal have selected certain target BS switched, the corresponding relation of multicast broadcast service MBS ZoneParameters between Serving MBS Zone and MBS Zone that this target BS meeting terminal receives informs terminal.If the corresponding relation between the MBSZone Parameters of the current MBS business not having terminal to receive of target BS between Serving MBS Zone and Target MBS Zone, then TBS needs first to obtain this corresponding relation.
If controlled switching, then terminal notification SBS choose TBS time, SBS notifies the target BS that Serving MBS Proxy switches, Serving MBS Proxy can send message to the Target MBS Proxy belonging to target BS, receives the MBS Zone Parameters of MBS business in message with present terminal at Serving MBS Zone; After TargetMBS Proxy receives message, the corresponding relation notice TBS between the MBS Zone Parameters of the MBS business that present terminal can be received between ServingMBS Zone and Target MBS Zone;
If uncontrolled switching, then terminal switch to TBS not in handoff preparation phase serving BS notification terminal candidate list of base stations in; The process of uncontrolled switching is: the terminal carrying out switching can initiate distance measurement request message to TBS, wherein, with the mark of SBS in this distance measurement request message; TBS notification terminal continues the parameter needed for receiving multicast and broadcast service at target MBS region relaying; Terminal carries out the reception of multicast broadcast service according to this parameter.
In uncontrolled switching, after TBS receives the distance measurement request message of in addition SBS mark, then TBS and SBS carries out interacting message, obtain present terminal receive the MBS Zone Parameters of MBS business; If SBS can not to provide in required MBS ZoneParameters parameter partly or entirely, then SBS can by obtaining with Serving MBSProxy alternately; Or the terminal that TBS continuation and Serving MBS Proxy obtain SBS alternately can not be provided receives the partial parameters in the MBS Zone Parameters of MBS business.
In uncontrolled switching, TBS obtains present terminal and receives MBS business after the MBS Zone Parameters of Serving MBS Zone, also needs to obtain present terminal and receives MBS business MBS Zone Parameters corresponding relation between Serving MBS Zone and Target MBS Zone.TBS can continue and Target MBS Proxy carries out interacting message acquisition present terminal reception MBS business MBS Zone Parameters corresponding relation between Serving MBS Zone and Target MBS Zone; Or above-mentioned from SBS or/and Serving MBS Proxy obtain present terminal receive MBS business Serving MBS Zone MBS Zone Parameters simultaneously, also obtain present terminal simultaneously and receive MBS business MBS Zone Parameters corresponding relation between Serving MBS Zone and Target MBS Zone.
In addition, also there is a kind of situation is exactly that SBS and TBS belongs to same MBSProxy jointly.In this case, the interacting message between aforementioned all Serving MBS Proxy and Target MBSProxy does not exist, and is same functive both them.
Processing procedure of the present invention is described in detail below in conjunction with concrete condition.
Situation one: SBS belongs to Serving MBS Proxy, TBS and belongs to Target MBSProxy.
As shown in Figure 1, in this case, comprise according to the motion management method of the multicast broadcast service of the embodiment of the present invention:
Step S102, after terminal (MS) meets predetermined switching condition and SBS belonging to MS knows the candidate base station of switching, SBS sends handover request message to Serving MBS Proxy, carries in candidate base station the MBS Zone Parameter of the list of the TBS outside the Serving MBS Zone being positioned at Serving MBSProxy place and the MBS context preservation of MS in handover request message;
Step S104, after Serving MBS Proxy receives handover request message, check in the Target MBS Zone in the list of TBS belonging to TBS and whether support the multicast broadcast service of MS current transmission (TBS can belong to multiple MBS Zone), if supported, determine this Target MBS Proxy corresponding to Target MBS Zone, and send the MBS Zone Parameter update request message of carrying Serving MBS Zone parameter to Target MBSProxy;
The multicast broadcast service that terminal receives by step S106, Target MBS Proxy returns to Serving MBS Proxy at the MBS Zone Parameters that Target MBS Zone is corresponding by MBS ZoneParameters Update RSP;
TBS is supported that present terminal multicast broadcast service situation returns to SBS by switching response message HO RSP by step S108, Serving MBS Proxy;
Step S110, SBS are continuing the TBS list notification of terminal current multicast broadcasting service to terminal (by message MOB BSHO REQ/RSP);
Step S112, after certain TBS in terminal notification SBS station list is selected, message transfer between SBS, Serving MBS Zone Proxy, Target MBS Proxy and TBS, the TBS chosen can obtain the corresponding relation of the current receiving multicast and broadcast service of terminal MBS Zone Parameter between Serving MBS Zone and Target MBS Zone;
Step 114, when on terminal switch to TBS, TBS is the corresponding relation notification terminal of current for terminal receiving multicast and broadcast service MBS ZoneParameter between Serving MBS Zone and Target MBS Zone.
In addition, above-mentioned steps S108 can also be, Serving MBS Proxy carries out base station selected according to its local policy, and by selection result through SBS notification terminal;
Fig. 2 shows the signaling process of the handoff preparation phase process when being initiated to switch by end side, as shown in Figure 2, specifically comprises the following steps:
(21) MS sends MOB MSHO REQ message to SBS, with the list of TBS in message;
(22) SBS sends HO REQ message to Serving MBS Proxy, with TBS list and MS receiving multicast and broadcast service mark in message; Optionally, the MBS Zone Parameter of current MBS Zone can be brought;
(23) Serving MBS Proxy sends MBS ZoneParameter Update REQ message, with TBS list and MS receiving multicast and broadcast service mark in message to Target MBS Proxy; Optionally, the MBS ZoneParameter of current MBS Zone can be brought;
(24) Target MBS Proxy sends MBS ZoneParameter Update RSP message to Serving MBS Proxy, TBS list and whether support the mark that original multicast broadcast service identifies on message band; Optionally, if TBS supports the multicast broadcast service of the current reception of MS, the corresponding relation of same multicast broadcasting service between Target MBS Zone and Serving MBS Zone between MBS Zone Parameter can be brought;
(25) Serving MBS Proxy sends HO RSP message to SBS, TBS list and whether support the mark that original multicast broadcast service identifies on message band; But wherein TBS list Serving MBS Proxy screens according to local policy; Optionally, if TBS supports the multicast broadcast service of the current reception of MS, the corresponding relation of same multicast broadcasting service between Target MBS Zone and Serving MBS Zone between MBS Zone Parameter can be brought;
(26) SBS sends MOB BSHO RSP message to MS, and with TBS list in message, wherein TBS list can be that SBS screens according to local policy.
Alternatively, can carry the corresponding relation of same multicast broadcasting service between Target MBS Zone and Serving MBS Zone in MBS ZoneParameter between air interface parameters (i.e. MCID, LCIDs, SAs) in this MOB BSHO RSP message is then another one inventive point.This makes it possible to save the treatment step that handover execution stage carries out this corresponding relation notice.
Fig. 3 shows the signaling process of the handoff preparation phase process when being initiated to switch by network side, as shown in Figure 3, specifically comprises the following steps:
(31) SBS sends HO REQ message to Serving MBS Proxy, with TBS list and MS receiving multicast and broadcast service mark in message; Optionally, the MBS Zone Parameter of current MBS Zone can be carried further;
(32) Serving MBS Proxy sends MBS ZoneParameter Update REQ message, with TBS list and MS receiving multicast and broadcast service mark in message to Target MBS Proxy; Optionally, the MBSZone Parameter of current MBS Zone can be carried further;
(33) Target MBS Proxy sends MBS ZoneParameter Update RSP message to Serving MBS Proxy, with TBS list and whether support the mark that original multicast broadcast service identifies in message; Optionally, if TBS supports the multicast broadcast service of the current reception of MS, the corresponding relation of same multicast broadcasting service between Target MBSZone and Serving MBS Zone between MBS Zone Parameter can be carried further;
(34) Serving MBS Proxy sends HO RSP message to SBS, with TBS list and whether support the mark that original multicast broadcast service identifies in message; But wherein TBS list Serving MBS Proxy screens according to local policy; Optionally, if TBS supports the multicast broadcast service of the current reception of MS, the corresponding relation of same multicast broadcasting service between Target MBS Zone and Serving MBS Zone between MBS ZoneParameter can be carried further;
(35) SBS sends MOB BSHO REQ message to MS, and with TBS list in message, wherein, TBS list can be the TBS list obtained after SBS has done screening according to local policy.
Alternatively, can carry the corresponding relation of same multicast broadcasting service between Target MBS Zone and Serving MBS Zone in MBS ZoneParameter between air interface parameters (i.e. MCID, LCIDs, SAs) in this MOB BSHO REQ message is then another one inventive point.This makes it possible to save the treatment step that handover execution stage carries out this corresponding relation notice.
The processing procedure of the execution phase switched in situation one is described below in conjunction with accompanying drawing.
Fig. 4 shows the signaling process of handover execution stage process in situation one.As shown in Figure 4, specifically comprise the following steps:
(41) MS sends MOB HO IND message to SBS, with the TBS that MS is selected in message;
(42) SBS sends HO Cnf (switching authentic information) to Serving MBS Proxy, with the mark of TBS in message; If (handoff preparation phase does not perform) is optional, carry the multicast broadcast service mark of current MS reception and the MBSZone Parameter of correspondence thereof further;
(43) Serving MBS Proxy sends switching authentic information, with the mark of TBS in message to the Target MBS Proxy belonging to TBS; If (handoff preparation phase does not perform) is optional, carry the multicast broadcast service mark of current MS reception and the MBS Zone Parameter of correspondence thereof further;
(44) Target MBS Proxy sends switching authentic information to TBS, with the corresponding relation of the current receiving multicast and broadcast service of MS MBS Zone Parameter in Serving MBS Zone and Target MBSZone in message;
(45) to (47) TBS to Target MBS Proxy, Target MBS Proxy sends to Serving MBS Proxy and Serving MBS Proxy to SBS and switches message acknowledgment message (HO Ack, represent have received HO Cnf message);
(48) MS reenters network at TBS; MS sends distance measurement request message RNG REQ to TBS; TBS sends RNG RSP message to MS, with MS MCIDs (LCIDs) in Serving MBS Zone and Target MBS Zone in message, and the corresponding relation of SAIDs;
(49) to (411) TBS to Target MBS Proxy, and Target MBS Proxy is to Serving MBS Proxy, and Serving MBS Proxy sends handoff completion message to SBS; After Serving MBS Proxy and SBS receives message, know that MS has left SBS and Serving MBS Zone;
(412) to (414) SBS to Serving MBS Proxy, Serving MBS Proxy is to Target MBS Proxy, Target MBS Proxy sends to TBS and switches message acknowledgment message (HO Ack), represents and receives handoff completion message (HO Complete).
Situation two: SBS and TBS belong to same MBS Proxy
As shown in Figure 5, in this case, comprise according to the motion management method of the multicast broadcast service of the embodiment of the present invention:
Step S502, after MS meets predetermined switching condition and SBS belonging to MS knows the candidate base station of switching, SBS sends handover request message to Serving MBS Proxy, wherein, the MBS Zone Parameter of the list of TBS in the Serving MBS Zone not belonging to Serving MBSProxy place and the MBS context preservation of MS is carried in candidate base station in handover request message;
Step S504, after Serving/Target MBS Proxy receives handover request message, check in the Target MBS Zone in the list of TBS belonging to TBS and whether support the multicast broadcast service of MS current transmission (TBS can belong to multiple MBS Zone), if supported, TBS is supported that present terminal multicast broadcast service situation returns to SBS by switching response message HO RSP by Serving/Target MBS Proxy;
Step S506, SBS can continue the TBS list notification of the current multicast broadcast service of support terminal to terminal (by message MOB BSHO REQ/RSP);
Step S508, after certain TBS in terminal notification SBS station list is selected, message transfer between SBS, Serving/Target MBS Proxy and TBS, the TBS chosen can obtain the corresponding relation of the current receiving multicast and broadcast service of terminal MBS Zone Parameter between Serving MBS Zone and Target MBS Zone;
Step 510, when on terminal switch to TBS, TBS is the corresponding relation notification terminal of current for terminal receiving multicast and broadcast service MBS ZoneParameter between Serving MBS Zone and Target MBS Zone.
In addition, above-mentioned steps S504 can also be, Serving/Target MBS Proxy carries out base station selected according to its local policy, and by selection result through SBS notification terminal;
The processing procedure of handoff preparation phase and handover execution stage in situation two is described in detail below in conjunction with accompanying drawing.
Fig. 6 shows the signaling process of the handoff preparation phase process when being initiated to switch by end side, as shown in Figure 6, specifically comprises the following steps:
(61) MS sends MOB MSHO REQ message to SBS, with the list of TBS in message;
(62) SBS sends HO REQ message to Serving/Target MBS Proxy, with TBS list and MS receiving multicast and broadcast service mark in message; Optionally, the MBS Zone Parameter of current MBS Zone can be carried further;
(63) Serving/Target MBS Proxy sends HO RSP message to SBS, TBS list and whether support the mark that original multicast broadcast service identifies on message band; Wherein, but the TBS list that obtained after having done screening according to local policy of TBS list Serving/Target MBS Proxy; Optionally, if TBS supports the multicast broadcast service of the current reception of MS, the corresponding relation of same multicast broadcasting service between Target MBSZone and Serving MBS Zone between MBS Zone Parameter can in this message, be carried further;
(64) SBS sends MOB BSHO RSP message to MS, and with TBS list in message, wherein, TBS list can be the TBS list obtained after SBS screens according to local policy.
Fig. 7 shows the signaling process of the handoff preparation phase process when being initiated to switch by network side, as shown in Figure 7, specifically comprises the following steps:
(71) SBS sends HO REQ message to Serving/Target MBS Proxy, with TBS list and MS receiving multicast and broadcast service mark in message; Optionally, the MBS Zone Parameter of current MBS Zone can be carried further;
(72) Serving/Target MBS Proxy sends HO RSP message to SBS, and message is with TBS list and whether support the mark that original multicast broadcast service identifies; Wherein, but the TBS list that obtained after having done screening according to local policy of TBS list Serving/Target MBS Proxy; Optionally, if TBS supports the multicast broadcast service of the current reception of MS, the corresponding relation of same multicast broadcasting service between Target MBSZone and Serving MBS Zone between MBS Zone Parameter can in message, be carried further;
(73) SBS sends MOB BSHO REQ message to MS, and with TBS list in message, wherein, TBS list can be the TBS list obtained after SBS has done screening according to local policy.
The processing procedure of the execution phase switched in situation two is described below in conjunction with accompanying drawing.
Fig. 8 shows the signaling process of handover execution stage process in situation two.As shown in Figure 8, specifically comprise the following steps:
(81) MS sends MOB HO IND message to SBS, with the TBS that MS is selected in message;
(82) SBS sends HO Cnf (switching authentic information) to Serving MBS Proxy, with the mark of TBS in message; If (handoff preparation phase does not perform) is optional, the multicast broadcast service mark that can receive with current MS further in message and the MBS Zone Parameter of correspondence thereof;
(83) Serving MBS Proxy sends switching authentic information to TBS, with the corresponding relation of the current receiving multicast and broadcast service of MS MBS Zone Parameter in Serving MBS Zone and Target MBSZone in message;
(83) to (85) TBS to Serving MBS Proxy, and Serving MBSProxy sends switching message acknowledgment message (HO Ack represents and have received HO Cnf message) to SBS;
(86) MS reenters network at TBS; MS sends distance measurement request message RNG REQ to TBS; TBS sends RNG RSP message to MS, with MS MCIDs (LCIDs) in Serving MBS Zone and Target MBS Zone in message, and the corresponding relation of SAIDs;
(87) to (88) TBS to Serving MBS Proxy, and Serving MBSProxy sends handoff completion message to SBS; After Serving MBS Proxy and SBS receives message, know that MS has left SBS and Serving MBS Zone;
(89) to (810) SBS to Serving MBS Proxy, Serving MBS Proxy, TBS send switch message acknowledgment message (HO Ack), show to receive handoff completion message (HOComplete).
Situation three: uncontrolled switching
As shown in Figure 9, when uncontrolled switching, the motion management method according to the multicast broadcast service of the embodiment of the present invention comprises the following steps:
Step S902, the distance measurement request message of the mark of the SBS carried belonging to it is sent to TBS by terminal;
Step S904, TBS obtain terminal current reception MBS business at the MBS Zone Parameter of ServingMBS Zone and/or the multicast broadcast service stream information obtaining terminal from SBS;
The target MBS proxy message corresponding to Target MBS Zone at step S906, TBS and its place obtains the corresponding relation of the current receiving multicast and broadcast service of terminal MBS Zone Parameters between Serving MBSZone and Target MBS Zone alternately;
Terminal is informed to MS at the MBS ZoneParameter of Serving MBS Zone and the corresponding relation of the MBS Zone Parameter in Target MBS Zone by step S908, TBS.
Step 904 also can be, TBS and SBS, Serving MBS Proxy message obtain the current receiving multicast and broadcast service of terminal at the corresponding relation of the MBS ZoneParameter of Serving MBS Zone with the MBS Zone Parameter in Target MBS Zone, so just do not need step 906.
Figure 10 shows the signaling process according to the mobile management process of the multicast broadcast service of the embodiment of the present invention in this situation three.As shown in Figure 10, specifically comprise the following steps:
(1001) MS sends distance measurement request message RNG REQ to TBS, identifies in message with SBS;
(1002) TBS and SBS is mutual, obtains the MBS Zone Parameter of MS at Serving MBS Zone; If some parameter is not preserved on SBS, need to obtain these parameters lacked from its Serving MBS Proxy at SBS;
(1003) TBS sends MBS Zone Parameter Update REQ message, with the mark of TBS in message to the Target MBS Proxy that Target MBS belonging to TBS is corresponding; And the MBS Zone Parameter of current MS in Serving MBS Zone;
(1004) Target MBS Proxy sends MBS Zone ParameterUpdate RSP message, with the corresponding relation of the current receiving multicast and broadcast service of MS MBS Zone Parameter in ServingMBS Zone and Target MBS Zone in message to TBS;
(1005) TBS sends RNG RSP message to MS, with MS MCIDs (LCIDs) in Serving MBS Zone and Target MBS Zone in message, and the corresponding relation of SAIDs.
As shown in figure 11, when uncontrolled switching, TBS and SBS alternately and the process obtaining the multicast broadcast service stream information of terminal specifically comprise:
Step S1102, TBS send context request message to SBS;
The multicast broadcast service stream information of the multicast broadcast service of current for terminal reception is sent to TBS by context request response message by step S1104, SBS.The multicast broadcast service stream information of terminal can comprise following one of at least: traffic stream identifier, multicast and broadcast area identification, multicast and broadcast transmission region mark, grouped data traffic identifier, business continuance require instruction, multicast and broadcast connection identifier.Like this, in multicast broadcast service stream information, just using multicast and broadcast transmission region mark as the first mark, using grouped data traffic identifier as the second mark, the first mark and/or the second mark for marking or index-group multicast broadcasting service stream can be utilized.Thus reach the object identifying a multicast broadcast service in global scope uniquely.
According to a further aspect in the invention, a kind of changing method of multicast broadcast service of terminal is provided.
In order to realize the switching of multicast broadcast service, first need the identified problems solving multicast broadcast service.In the related, multicast service stream attribute can reuse the attribute of unicast service stream, but, because unicast service traffic identifier (SF ID) distributes in units of MS, that is, for unicast service stream, (MS ID, SF ID) can unique identification unicast service stream; And to certain multicast service, when MS subscribes to certain group business stream, its grappling service flow authorization device (Anchor SFA) being positioned at Access Network also can distribute a traffic stream identifier SF ID for this MS, now, for same group business stream, the MS of each this business of reception can have a corresponding combination (MS ID, SF ID) to identify this group business stream.Obviously, to group business stream, the identification method of unicast service can not carry out the mark of unified approach in global scope to multicast service, can not reach the object of mark multicast service.
With regard to unicast service stream, the grouped data traffic identifier of all traffic flow assignment one within the scope of this MS that core net can be subscribed to for MS (can be described as PDF ID, SF ID one_to_one corresponding in this mark and Access Network), so just can carry out unique identification unicast service stream with (MS ID, PDFID); In Access Network, (MS ID, PDFID) can be mapped to (MS ID, SF ID), in like manner, also can carry out unique identification unicast service stream with (MS ID, SFID);
For multicast service, core net can (this region can identify with MCBCS Transmission Zone ID in multicast and broadcast transmission region, namely, the first mark hereinafter described) (namely the group business stream that carries distribute a unique mark PDF ID in this multicast and broadcast region, the second mark hereinafter described), so just can carry out unique identification group business stream with (MCBCSTransmission Zone ID, PDF ID).Now, uniquely identified group business stream (MCBCS Transmission ID, PDFID) can be mapped to multiple (MS ID, SFID) in Access Network.
Based on above-mentioned identification method, the changing method processing procedure according to the multicast broadcast service of terminal of the present invention will be described below.
In the changing method that will describe below, handoff procedure does not need the participation of MBS Proxy, and each BS preserves terminal current receiving multicast and broadcast service stream information, the multicast broadcast service stream parameter of this BS place MBS Zone and air interface parameters thereof and supports the multicast and broadcast zone list of same multicast broadcast service.
Like this, the multicast broadcast service stream Parameter transfer that just terminal can be received by serving BS is to target BS, then the multicast broadcast service air interface parameters MCID etc. that target BS is corresponding sends to terminal, thus terminal can continue receiving multicast and broadcast service in new multicast and broadcast region.
In addition, this method needs the overall identification of multicast broadcast service, the overall identification of multicast broadcast service can adopt multicast and broadcast transmission region to identify and be added in multicast and broadcast transmission region as the grouped data traffic identifier of this multicast broadcast service distribution represents (that is, above-mentioned identification method).
In embodiments of the present invention, a kind of changing method of multicast broadcast service of terminal is provided.
As shown in figure 12, step S1202 and step S1204 is comprised according to the changing method of the multicast broadcast service of the terminal of the embodiment of the present invention.
Being specifically treated to shown in Figure 12:
Step S1202, the serving BS of terminal preserves the multicast broadcast service stream information of terminal reception;
Step S1204, the multicast broadcast service stream information of terminal is passed to the target BS of switching by serving BS by message.
Multicast broadcast service stream information comprise following one of at least: traffic stream identifier (SF ID), multicast and broadcast area identification (MBS Zone ID), multicast and broadcast transmission region mark (MBSTransmission Zone ID), grouped data traffic identifier (PDF ID), business continuance require instruction (according to this mark, serving BS can determine whether the broadcasting multicast service switched has requirement to continuity), multicast and broadcast connection identifier (MCID).
Preferably, can using the multicast and broadcast transmission region mark in multicast broadcast service stream as the first mark, using the grouped data traffic identifier in multicast broadcast service stream as the second mark, and in multicast broadcast service stream information, identify multicast broadcast service by the first mark and/or the second mark for marking.
In multicast broadcast service stream information, traffic stream identifier is unique within the scope of terminal, therefore at certain multicast broadcast service stream that certain terminal then can identify with traffic stream identifier or this terminal of index receives.In addition, grouped data traffic identifier in multicast broadcast service information flow is unique in multicast and broadcast transmission region to be distributed, therefore can using the multicast and broadcast transmission region in multicast broadcast service stream as above-mentioned first mark, and using the grouped data traffic identifier in multicast broadcast service stream information as above-mentioned second mark, such network side just can identify and/or the second mark for marking or this multicast broadcast service stream of index with first.
In addition, when the target BS of switching and the serving BS of terminal belong to different multicast and broadcast region, after the multicast broadcast service stream information that target BS receives from serving BS, target can continue parameter needed for receiving multicast and broadcast service according to multicast broadcast service stream information determination terminal at target multicast and broadcast region relaying in base station, and parameter is sent to terminal; Terminal is according to the parameter receiving multicast and broadcast service from target BS.
Further, target BS send to the parameter of terminal can comprise following one of at least: the multicast broadcast service stream information parameter that after traffic stream identifier, multicast and broadcast area identification, multicast and broadcast connection identifier, multicast and broadcast area change, other changes.
Particularly, the transmission of multicast broadcast service stream information can perform in the execution phase of the preparatory stage of controlled switching and switching, the different phase describing switching in detail is carried out the processing procedure of the notice of multicast broadcast service stream information below.
The preparatory stage transport multicast broadcasting service stream information that (situation one) is switching
In this case, switching can be initiated by terminal, also can be initiated by network side.
On the one hand, when switching is initiated by terminal, the process that multicast broadcast service stream information is informed to the target BS of switching by serving BS comprises:
The preparatory stage switched, serving BS receives the handover request message of self terminal, and select in the base station of carrying from handover request message to support that the base station of same multicast broadcast service is as target BS, and by multicast broadcast service stream information by handover request message informing to the target BS selected.
And, when serving BS judges that terminal sends to the base station of carrying in the handover request message of serving BS all not support same multicast broadcast service, serving BS can send switching response message to terminal, and in switching response message, carry this instruction switched of refusal.Preferably, may further include the successional base station of support multicast broadcast service that serving BS is recommended in this switching response message.
When MS while when receiving multicast and broadcast service and unicast service, when serving BS judges that terminal sends to the base station of carrying in the handover request message of serving BS all not support multicast broadcast service, serving BS needs to determine whether to refuse current switching according to its local policy.Such as, although the same multicast broadcast service of all target BS not current reception of support terminal, if target BS continues to support unicast service, and unicast service priority ratio is higher, such as, the type of unicast service is urgent call, and now serving BS can not refuse current switching.
In addition, particularly, for the switching that MS triggers, the handover request message that serving BS can send according to terminal to can the process that judges of the successional base station of multicast broadcast service of the current reception of support terminal as shown in figure 13, specifically comprise following process:
Step 1302, serving BS receives the handover request message that MS sends, and comprises the target BS list of switching in this message;
Step 1304, if need to support multicast and broadcast data service continuity, need to check the target BS list in handover request message, judge whether the successional base station of multicast broadcast service (that is, determining whether there is target BS) that there is support terminal reception; If existed, perform step 1306, otherwise perform step 1308;
Step 1306, to supporting that the target BS of same multicast broadcast service sends handover request message, continues switching flow;
Step 1308, serving BS sends switching response message to MS, the switching that this response message is initiated for refusing MS, and the successional target BS of multicast broadcast service that support terminal can be received by this response message by serving BS recommends terminal.
On the other hand, when switching is initiated by network side, as shown in figure 14, the process that multicast broadcast service stream information is informed to the target BS of switching by serving BS comprises:
Step 1402, the preparatory stage switched, serving BS is selected to support that the base station of this multicast broadcast service is as target BS from around neighbor base station, and by target BS that the multicast broadcast service stream information of terminal is selected to network side by handover request message informing;
Step 1404, the target BS (that is, the successional adjacent base station of multicast broadcast service of the current reception of support terminal) that the multicast broadcast service stream information of terminal is selected to network side by handover request message informing by serving BS.
The execution phase transport multicast broadcasting service stream information that (situation two) is switching
In this case, as shown in figure 15, the process that (terminal) multicast broadcast service stream information informs to the target BS of switching comprises by serving BS:
Step 1502, serving BS receives the switch indicating information of self terminal, obtains the final goal base station (final target BS is selected by terminal) of switching from switch indicating information;
Step 1504, the multicast broadcast service stream information of terminal is informed to target BS by switching authentic information by serving BS.
In addition, when carry out switch to uncontrollable or unpredictable switching, the process that the multicast broadcast service stream information of terminal informs to target BS can comprise by serving BS: target BS sends context request message to serving BS; The multicast broadcast service stream information of terminal is included in context request response message and sends to target BS by serving BS.
In addition, in the method, after target BS becomes the new serving BS of terminal, the multicast broadcast service stream information of the terminal that new serving BS is preserved.
In sum, by means of technical scheme of the present invention, by the Signalling exchange in the middle of define grid side and terminal and network side between functional entity, and multicast broadcast service is identified uniquely, have effectively achieved the switching of the multicast broadcast service of terminal, avoid in correlation technique the problem handover scheme of unicast technique being applied to multicast and broadcast and switching and cause thus, fill up the blank of correlation technique.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a motion management method for multicast broadcast service, is characterized in that, described method comprises:
Serving BS and service MBS agency alternately, obtain the station list that can continue the multicast broadcast service of support terminal current transmission, and described station list are informed to terminal;
The target BS that described terminal is chosen notifies that described terminal receives the parameter needed for same multicast broadcasting service in the relaying continued access of target MBS region;
Described terminal carries out the reception of multicast broadcast service according to described parameter;
Described serving BS and the described MBS of service act on behalf of and carry out the mutual and process obtaining described station list and be specially:
Candidate list of base stations is notified that described service MBS acts on behalf of by described serving BS;
Described service MBS agency picks out and can continue to support that the station list that described terminal receives same multicast broadcasting service returns to serving BS from the described candidate list of base stations of notice;
The processing procedure that described service MBS agency selects station list is:
Each target BS in the described candidate list of base stations that described service MBS proxy lookups receives, judge in the one or more target MBS regions belonging to target BS, the service MBS region whether existed described in a described target MBS region and the current place of described terminal belonging to serving BS is same MBS transmission region, or whether transmits identical multicast broadcast service; If the judgment is Yes, after then showing described terminal switch to this target BS, can receive former multicast broadcast service by target MBS region continuous belonging to target BS, and described service MBS agency thinks that this target BS is can continue to support that described terminal receives the base station of identical multicast broadcast service.
2. method according to claim 1, is characterized in that, described serving BS knows that the process of candidate base station is:
The candidate list of base stations that described terminal will switch to described serving base stations report; Or
Described serving BS according to itself in advance from the candidate list of base stations one of at least selecting to switch the following information that described terminal or adjacent base station obtain: the load of neighbor base station radio environment information, described serving BS and neighbor base station.
3. method according to claim 1, is characterized in that, after described service MBS agency determines described station list, comprises further:
Described service MBS agency acts on behalf of with the target MBS of target BS and carries out interacting message, obtain the multicast broadcast service of the current reception of described terminal at the corresponding relation of serving MBS region and the interregional MBS region parameter of target MBS, and described corresponding relation is sent to described serving BS.
4. method according to claim 3, is characterized in that, after described serving BS obtains described corresponding relation, comprises further:
Described corresponding relation is informed to described terminal by described serving BS.
5. the method according to claim 3 or 4, is characterized in that, comprises further:
Described service MBS acts on behalf of or described serving BS screens target BS, is stored in described station list by the target BS after screening.
6. method according to claim 1, is characterized in that,
After the target BS chosen when described terminal notifies described serving BS, this target BS is notified that described service MBS acts on behalf of by described serving BS, and the multicast broadcast service that this target BS and described terminal receive by described service MBS agency is acted on behalf of at the MBS region parameter notification target MBS in service MBS region;
Described target MBS agency then by the MBS region parameter needed for the multicast broadcast service of current for described terminal reception at target MBS regional service and the interregional corresponding relation notice TBS of target MBS.
7. method according to claim 6, it is characterized in that, when described service MBS acts on behalf of identical with described target MBS agency, after choose target BS is notified described serving BS by described terminal, this target BS is notified that described service MBS acts on behalf of/described target MBS agency by described serving BS, and the MBS region parameter needed for the multicast broadcast service of current for described terminal reception is informed to described target BS in service MBS region and the interregional corresponding relation of target MBS by described service MBS agency/described target MBS agency.
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| CN102611717A (en) * | 2011-01-19 | 2012-07-25 | 中国移动通信集团公司 | Service data sending method and system, client-side agent and server agent |
| CN103260195B (en) * | 2012-02-17 | 2016-06-08 | 华为技术有限公司 | Video service data transmission and device |
| CN104918204A (en) * | 2015-03-17 | 2015-09-16 | 华中科技大学 | Unicast and multicast conversion control method in LTE |
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| CN104105071A (en) | 2014-10-15 |
| CN104105070A (en) | 2014-10-15 |
| CN101674526A (en) | 2010-03-17 |
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