CN103428787B - A kind of base station switch method and device - Google Patents
A kind of base station switch method and device Download PDFInfo
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Abstract
The invention discloses a kind of base station switch method and device, in order to reduce system signaling expense, reduce S1 interface switching process required time, thus improve the efficiency base station served for UE being switched to target eNode B by source eNodeB based on S1 interface.A kind of base station switch method provided by the invention comprises: the source cluster mobility session management entity TMSE being user equipment (UE) service, and the requirement being received as the source evolved base station eNodeB transmission that this UE serves switches message; Source TMSE switches message according to described requirement, and the base station served for UE is switched to target eNode B by source eNodeB.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of base station switch method and device.
Background technology
Evolved base station (the eNodeB defined in the LTE system of 3GPP specification, eNB) switch with the S1 interface of core-network side, during for switching unavailable based on the X2 interface between eNodeB, can based on the switching between S1 interface reference point initiation eNodeB, this function is used for needing reorientation mobile management entity (MobileManagementEntity in handoff procedure, MME), or MME and gateway (ServingGateway, S-GW) all reorientation is needed, or MME does not change, but various scenes when not having X2 interface between eNB, concrete flow process as shown in Figure 1, comprise step 1 to step 21b.
In existing system, which evolved packet system (EvolvedPacketSystem the S1 interface switching process of subscriber equipment (UE) determines by source eNodeB, EPS) carrying can be used for grouped data to be forwarded to target eNode B, forwarding of packets comprises downlink grouped and upstream packet, and wherein upstream packet forwards is an option.Evolution block core (EvolvedPacketCore, EPC) can't change the carrying list of the forwarding of packets that eNodeB determines.Forwarding of packets can adopt direct pass-through mode by X2 interface from source eNodeB to target eNode B, also can forward grouping indirectly by source S-GW and target S-GW.
In sum, in TD-LTE group system scheme of the prior art, S1 interface switching process does not consider the management carried original group calling, and system signaling expense is comparatively large, and S1 interface switching process required time is longer.
Summary of the invention
Embodiments provide a kind of base station switch method and device, in order to reduce system signaling expense, reduce S1 interface switching process required time, thus improve the efficiency base station served for UE being switched to target eNode B by source eNodeB based on S1 interface.
A kind of base station switch method that the embodiment of the present invention provides comprises:
For the source cluster mobility session management entity TMSE of user equipment (UE) service, the requirement being received as the source evolved base station eNodeB transmission that this UE serves switches message;
Source TMSE switches message according to described requirement, and the base station served for UE is switched to target eNode B by source eNodeB.
A kind of base station switching device shifter that the embodiment of the present invention provides comprises:
Require to switch message reception units, the requirement that the source evolved base station eNodeB for being received as the service of this user equipment (UE) sends switches message;
Switch unit, for switching message according to described requirement, is switched to target eNode B by the base station served for UE by source eNodeB.
The embodiment of the present invention is the source cluster mobility session management entity TMSE of user equipment (UE) service, and the requirement being received as the source evolved base station eNodeB transmission that this UE serves switches message; Source TMSE switches message according to described requirement, the base station served for UE is switched to target eNode B by source eNodeB, thus reduce system signaling expense, decrease S1 interface switching process required time, improve the efficiency base station served for UE being switched to target eNode B by source eNodeB based on S1 interface.
Accompanying drawing explanation
Fig. 1 is the S1 interface switching flow schematic diagram based on 3GPP in prior art;
The network architecture schematic diagram of the TD-LTE wideband multimedia cluster that Fig. 2 provides for the embodiment of the present invention;
The S1 interface switching flow schematic diagram that Fig. 3 provides for the embodiment of the present invention;
The TAU process schematic that Fig. 4 provides for the embodiment of the present invention;
The schematic flow sheet of the base station switch method of the TMSE side that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the base station switching device shifter of the TMSE side that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of base station switch method and device, in order to reduce system signaling expense, reduce S1 interface switching process required time, thus improve the efficiency base station served for UE being switched to target eNode B by source eNodeB based on S1 interface.
The embodiment of the present invention based on TD-LTE wideband multimedia cluster the network architecture as shown in Figure 2, this network system comprises subscriber equipment (UE), evolved base station (eNB), cluster mobility session management entity (TrunkingMobilitySessionEntity, TMSE), dispatch server, home subscriber server (HomeSubscriberServer, HSS) and a few part of dispatching desk.Under this system architecture, core net adopts centralization thought, and the function unification of equipment of the core network (comprising MME/SGW/PGW) realized by TMSE, TMSE directly controls to have all TD-LTE base station equipments under its command, to reduce the Signalling exchange in group call establishment process.
In group system described in the embodiment of the present invention, because the UE in handoff procedure may carry out cluster multi call business simultaneously, carry out group calling condition judgement with regard to needs at network side like this, and carry according to the descending group calling between corresponding tactical management and eNodeB.
The embodiment of the present invention is based on the network architecture shown in Fig. 2, and propose based on the S1 interface switching process under this framework, see Fig. 3, this process specifically comprises step:
A1, source eNodeB, according to X2 interface connection status and target eNode B connection status, determine that initiation one is based on the switching (also can be called that S1 interface switches) between the source eNodeB of the S1 interface between eNodeB and TMSE and target eNode B.
Wherein, source eNodeB be receive S1 interface handover request that UE initiates (hereinafter referred to as UE, be the UE of this initiation S1 interface handover request) after, trigger the S1 interface switching flow in the present embodiment.
A2, source eNodeB send one and require to switch message (HandoverRequired) to source TMSE, this message carries the validity of switching type, directly forward-path, source eNodeB identifies (TAI) and S1 Application Protocol (S1ApplicationProtocol, S1AP) reason to the transparent vessel of target eNode B, target eNode B mark, target following district.
Wherein, in transparent vessel, indicate the carrying list performing data retransmission.
Direct forward-path validity, indicate and whether can carry out direct data retransmission from source eNodeB to target eNode B, it is based on the existence of the X2 interface between source eNodeB and target eNode B.
The effect of target following district mark TAI is used to indicate to select suitable target TMSE.
A3, the requirement that source TMSE sends according to source eNodeB switches message, be judged as whether the TMSE that UE serves changes, if change, then switch the target eNode B mark of carrying in message as requested, select target TMSE, and send a forward RELOCATION REQUEST message to target TMSE, wherein carry the UE context in the TMSE of source, source eNodeB is to the transparent vessel of target eNode B, wireless access network (RadioAccessNetwork, RAN) cause value, target eNode B identifies, target following district mark TAI, travelling carriage (MS) information changes behavior (if this mark is effective), and directly forward mark.
If the TMSE that A4 serves for UE changes, namely need to carry out TMSE reorientation, then target TMSE divides target TMSE address and the termination point of a tunnel mark (TunnelEndpointIdentifier of the upstream packet of the S1-U interface be used between target eNode B and target TMSE, thus be embodied as the UE that request S1 interface switches and set up new carrying TEID).
I.e. above-mentioned steps A3 and A4 needs when the TMSE served for UE changes to perform.
If the TMSE that A5 serves for UE changes, then send handover request message by target TMSE to target eNode B, otherwise, directly can send handover request message by source TMSE to target eNode B, this handover request message carries the evolved packet system (EvolvedPacketSystem that will set up, EPS) carrying, user terminal Aggregate Maximum Bit Rate (UE-AggreGateMaximumBitRate, UE-AMBR), S1AP cause value, source eNodeB to the transparent vessel of target eNode B, and switches restriction list.
This handover request message creates UE context in target eNode B, comprises beared information, safe context.Carry for each EPS, the EPS that set up carries the target TMSE address and up TEID and EPS bearer quality of service (QualityofService, QoS) that comprise for user face.
If directly forwarding mark instruction directly forwards unavailable, and target TMSE knows that not having indirect data to forward between source eNodeB and target eNode B connects, then will set up bearing parameter and must comprise and can not carry out data retransmission instruction.
If the TMSE that A6 serves for UE changes, then target eNode B sends a handoff request acknowledgment message to target TMSE, otherwise target eNode B sends handoff request acknowledgment message to source TMSE.
This handoff request acknowledgment message comprise switching type, switch reasons, foundation carrying list and set up failed carrying list and UE-AMBR.
EPS carries to set up in list and includes the eNodeB service IP address and TEID that target eNode B is S1-U interface up-downgoing grouping distribution, and is the eNodeB service IP address and the TEID that receive forwarding data distribution.If UE-AMBR changes, then target TMSE recalculates new UE-AMBR and new UE-AMBR is sent to target eNode B.Otherwise target TMSE must refuse handoff procedure, and initiate detachment process and delete conversation procedure.
If the TMSE that A7 serves for UE changes, source TMSE creates indirect data forwarding tunnel request message (this message comprises the tunnel ID(TEIDs of target eNode B address forward) by sending) to target TMSE, set up retransmitting paramater at target TMSE.
A8, target TMSE respond and create indirect data forwarding tunnel response message (this message carries cause value, and target eNode B is to the transparent vessel of source eNodeB, and EPS carrying sets up list, target TMSE address and forward TEIDs).
A9, corresponding with above-mentioned steps A3, if changed for the TMSE of UE service, target TMSE sends a forward relocation response message to source TMSE.If with indirectly forwarding, this message comprises target TMSE address for indirectly forwarding and TEID.
A10, corresponding with above-mentioned steps A2, source TMSE sends a switching command to source eNodeB.Carry out the bearing parameter of forwarding data, contain the TMSE service IP address for data retransmission distributes and TEID list, the bearing parameter that discharge contains the carrying list that will discharge.
If the UE that A11 asks S1 interface to switch, also carrying out group service simultaneously, such as, in a group-call/multicast/individual calling, and there is not group calling downlink bearing in the S1 interface between target eNode B and target TMSE, then target TMSE sends group calling context to target eNode B and sets up request message, for downlink bearing is set up in the group calling of this user, this message comprises TMSE cluster group S1 Application of Interface mark (S1APID) (TMSETrunkingGroupS1APID) and collection group identification (TrunkingGroupIdentify, TGID);
A12, target eNode B set up request message according to group calling context, for the descending TEID of collection group allocation, and respond group calling context and set up response, wherein, comprise TMSETrunkingGroupS1APID and eNB cluster group S1APID(eNBTrunkingGroupS1APID);
A13, corresponding with above-mentioned steps A10, source eNodeB sends switching command to UE, concrete, target eNode B can be used to transparent vessel structure switching command (HandoverCommand) message of source eNodeB, the UE being sent to by switching command UE(namely to ask S1 interface to switch).
When UE receives this switching command message, the unacceptable any EPS carrying in Target cell will be deleted.
A14, source eNodeB are through source TMSE(or source TMSE and target TMSE) send eNodeB state transfer message to target eNode B, RAB (the Evolved-RadioAccessbearer of the evolution that this Message Transmission is preserved, E-RAB) corresponding PDCP (PacketDataConveragenceProtocol, and Hyper Frame Number (Hyper-FrameNumber, HFN) state information PDCP).
If neither one E-RAB adopts PDCP state saving mechanisms, then source eNodeB may omit and send this message.
If the TMSE that A15 serves for UE changes, then source TMSE sends forward access contextual information message (ForwardAccessContextNotification) to target TMSE, and this message comprises RAB context, E-UTRAN transmission container;
A16, target TMSE send forward access context acknowledge message (ForwardAccessContextAcknowledge) to source TMSE, wherein carry cause value.
A17, source TMSE or target TMSE send eNodeB state transfer (eNodeBStatusTransfer) message to target eNode B, and wherein this message comprises eNB state transfer container.
Above-mentioned steps A14-A17 is optional step, is not the required step of S1 interface switching flow.
A18, after UE is successfully synchronized to Target cell, just sends one and switch and confirm that (HandoverConfirm) message is to target eNode B.The data that down forward from source eNodeB are transferred to UE, and upstream data is sent by UE, is forwarded to target TMSE.
A19. target eNode B sends a switching notice (HandoverNotify(carries TAI+ECGI)) message is to target TMSE.
A20, corresponding with above-mentioned steps A9, if changed for the TMSE of UE service, then target TMSE sends forward reorientation and completes (ForwardRelocationComplete) message to source TMSE.
A21, responsively, source TMSE sends a forward reorientation and completes response message to target TMSE.A timer is started to monitor the release conditions of the resource of source eNodeB and source TMSE at source TMSE.Once receive forward reorientation to complete response message, target TMSE starts a timer for monitoring the user face resource that the target TMSE carrying out indirectly forwarding distributes.
A22, target TMSE revise the carrying of UE and network side; Target TMSE is that downlink business is according to a carrying allocation address and a TEID principle Resources allocation.
A23., after steps A 19, upgrade trigger condition for the moment when meeting TAU, UE initiates tracing section updating (TrackingAreaUpdate, a TAU) process.Target TMSE knows a handoff procedure for this UE performs, because it is by switching message sink to bearer context, thus the subset of the just TAU process of target TMSE execution, does not particularly perform normal context repeating process between source TMSE and target TMSE.
A24. the carrying of the UE of source TMSE removal request S1 interface switching.
A25, when A21 step starts after timer expiry, source TMSE sends UE context release command (UEContextReleaseCommand) message to source eNodeB, and this message carries release cause.
A26, source eNodeB discharge the resource relevant to UE and respond a UE context and discharged (UEContextReleaseComplete) message.
If not other users of cluster group of carrying out of this user under the eNodeB of A27 source, the group carrying necessity not namely between eNodeB and the TMSE of source, then source TMSE is to source eNodeB transmission group calling context release command message;
After A28, source eNodeB receive group calling context release command message, delete this group bearer context, and reply group calling context Release complete to source TMSE, this message carries TMSETrunkingGroupS1APID and eNBTrunkingGroupS1APID.
Steps A 27 and A28 are the steps corresponding with above-mentioned steps A11 and A12.
A29, after steps A 26, indirectly forward if used, then source TMSE is at the timer expiry of A21 step startup, and source TMSE sends deletion indirect data forwarding tunnel request (DeleteIndirectDataForwardingTunnelRequest) message and carrys out release steps A7 for indirectly forwarding the temporary resource distributed to target TMSE.
A30, target TMSE reply deletion indirect data forwarding tunnel response (DeleteIndirectDataForwardingTunnelResponse) message and carry out release steps A7 for indirectly forwarding the temporary resource distributed to target TMSE.
Steps A 29 and A30 are the steps corresponding with above-mentioned steps A7 and A8.
It should be noted that, in above-mentioned steps, flow process mutual between source TMSE and target TMSE, perform when the TMSE of the UE service switched for request S1 interface changes, if the TMSE of the UE service that request S1 interface switches does not change, then there is not flow process mutual between source TMSE and target TMSE, the interaction flow of above-mentioned all target TMSE and base station side, is then the interaction flow of source TMSE and base station side.
Above-mentioned TAU process, specifically see Fig. 4, comprising:
B1.UE to new eNodeB(eNb-new, i.e. above-mentioned target eNode B) send tracing section updating request message, to initiate TAU process, wherein carry RRC parameter, this RRC parameter comprises old TMSE (above-mentioned 2nd TMSE) mark, and PLMN mark.
The network parameter TAI selected of the TMSE mark that B2. new eNodeB is old from RRC parameter and instruction, obtains the above-mentioned TMSE of new TMSE() mark, or if can not get new TMSE mark, new eNodeB just selects a TMSE.Then, new eNodeB forward TAU request message gives new TMSE, wherein carries the old global unique temporary identity (OldGUTI) of TAI, ECGI parameter and UE.
B3. new TMSE carries out integrity protection checking to TAU request message; if carry out integrity protection to TAU request message to be proved to be successful; new TMSE must send context request message to old TMSE, wherein comprises old GUTI, complete TAU request message, MME address and UE and confirms mark.New TMSE sends context request message to old TMSE, in order to obtain user profile.New TMSE is from old global unique temporary identity (GloballyUniqueTemporaryIdentity, GUTI) in, obtain the unique mobile management entity (MobileManagementEntity, MME) mark (GloballyUniqueMMEIdentifier, GUMMEI) in the old whole world.
B4. old TMSE carries out integrity protection checking (this checking algorithm continues to use the checking algorithm of existing 3GPP standard) to the context request message that new TMSE sends, if be proved to be successful, then old TMSE returns context response information, this message comprises IMSI, travelling carriage country PSTN/ISDN number (MSinternationalPSTN/ISDNnumber, MSISDN), no EPS authentication vector, connection security management entity key set identifier (KeySetIdentifierAccessSecurityManagementEntity, KSIASME), connection security management entity key (KeyAccessSecurityManagementEntity, KASME), EPS bearer context, gateway (ServingGW) signaling address, one or more termination point of a tunnel mark (TunnelEndpointIdentifier, TEID), travelling carriage (MS) information changes report, UE core net network capabilities, and UE discontinuous reception (DRX) parameter.
If the integrity checking failure of B5. TAU request message, then new TMSE must be initiated through the authentication process for UE and ciphering process (these two processes all adopt the respective process of existing 3GPP standard definition) that HSS carries out.
B6. new TMSE sends context acknowledge message to old TMSE, and wherein this message comprises cause value and SeringGW change instruction.Old TMSE hereinafter marks gateway and home subscriber server (HomeSubscriberSerer thereon, HSS) information in is invalid, thus ensureing before completing TAU process, UE gets back to when old TMSE initiates TAU process can more new gateway and HSS.
B6-1, new TMSE, according to receiving context response information, upgrade the carrying of UE;
If B7 asks the UE of TAU also carrying out group service simultaneously, such as, in a group-call/multicast/individual calling, and there is not group calling downlink bearing in the S1 interface between new eNodeB and new TMSE, then new TMSE sends group calling context to new eNodeB and sets up request message, for downlink bearing is set up in the group calling of this UE, wherein this group calling context is set up request message and is comprised: TMSE cluster group S1 Application of Interface ID(S1APID) (TMSETrunkingGroupS1APID) and collection group identification (TrunkingGroupIdentify, TGID);
B8, new eNodeB set up the TGID in request message according to group calling context, for collection group allocation downlink tunnel terminal mark (TunnelEndpointIdentifier, TEID), and respond group calling context and set up response, wherein, TMSETrunkingGroupS1APID and eNB cluster group S1APID(eNBTrunkingGroupS1APID is comprised);
If the eNodeB(eNb-old that B9 is old, i.e. above-mentioned source eNodeB) under other UE in cluster group not belonging to this UE except this UE, namely the group between source eNodeB and old TMSE carries necessity not, then old TMSE sends group calling context release command message to source eNodeB, and this message carries TMSETrunkingGroupS1APID and eNBTrunkingGroupS1APID;
B10, source eNodeB delete the bearer context of this cluster group after receiving group calling context release command message, and return group calling context Release complete to old TMSE.
B11. the beared information carried in the context response information that new TMSE responds according to old TMSE, check from the evolved packet system (EvolvedPacketSystem the UE loading context information that old TMSE obtains, EPS) loaded state parameter, according to this EPS loaded state parameter, release does not have the EPS activated to carry and upgrades EPS carrying; Further, new TMSE sends position updating request to HSS, for upgrading the position data of user.
B12.HSS sends position and deletes message to old TMSE, wherein carries updating type and the IMSI of MME renewal process (MME_UPDATE_PROCEDURE (0)).
B13. after old TMSE receives position deletion message (wherein carrying updating type and the IMSI of MME_UPDATE_PROCEDURE (0)), delete the record being kept at this user in old TMSE, and reply position deletion response message to HSS.
After B14.HSS receives position deletion response message, respond location updating response message to new TMSE, this message carries IMSI and subscription data (SubscriptionData).
If B15. due to regional subscription restriction or access restriction, new TMSE does not allow UE to be linked into the tracing area (TrackingArea of its selection, TA) region, then new TMSE does not allow (TrackingAreanotallowed) for reason refusal TAU request message with tracking area.Otherwise new TMSE responds tracing section updating to UE and accepts message, carries GUTI, TAI list (list), EPS loaded state (bearerstatus), NAS serial number (sequencenumber) and NAS-MAC in this message.
If the TMSE(B16. belonging to UE is the TMSE of UE service) change, new TMSE can distribute new GUTI to UE, this just means that the GUTI of UE there occurs change, at this time UE needs to upgrade acceptance response message to new TMSE, to confirm that tracing section updating process completes by returning tracking district.
As can be seen here, in TMSE side, see Fig. 5, a kind of base station switch method that the embodiment of the present invention provides, comprises step:
S101, be user equipment (UE) service source cluster mobility session management entity TMSE, be received as this UE serve source evolved base station eNodeB send requirement switch message;
S102, source TMSE switch message according to described requirement, and the base station served for UE is switched to target eNode B by source eNodeB.
Preferably, source TMSE switches message according to described requirement, the base station served is switched to target eNode B by source eNodeB, comprises for UE:
Source TMSE switches message according to described requirement, and notification target eNodeB needs the switching carrying out source eNodeB and target eNode B;
Source TMSE sends switching command to source eNodeB, by source eNodeB, this switching command is sent to UE;
The handoff notification message that source TMSE receiving target eNodeB sends, or when the TMSE served for UE changes, the handoff notification message that target TMSE receiving target eNodeB sends, then performs tracing section updating process;
Source TMSE deletes the carrying of UE, and performs the contextual process of described UE on source of release eNodeB, thus realizes the base station served for UE to be switched to target eNode B by source eNodeB.
Preferably, source TMSE switches message according to described requirement, and notification target eNodeB needs the switching carrying out source eNodeB and target eNode B, comprising:
When the TMSE served for UE changes, source TMSE switches message according to described requirement, select target TMSE, sends forward RELOCATION REQUEST message to target TMSE;
Target TMSE according to described forward RELOCATION REQUEST message, for UE sets up new carrying;
Target TMSE sends handover request message to target eNode B;
The handoff request acknowledgment message that target TMSE receiving target eNodeB replys.
Preferably, source TMSE is to after target TMSE sends forward RELOCATION REQUEST message, and the method also comprises:
Source TMSE creates indirect data forwarding tunnel request message to target TMSE by sending, and realizes setting up retransmitting paramater at target TMSE;
Target TMSE replys and creates indirect data forwarding tunnel response message to source TMSE;
Target TMSE sends forward relocation response message to source TMSE.
Preferably, target TMSE sends forward relocation response message to after the TMSE of source, and the method also comprises:
If described UE, need to carry out group service, and the S1 interface between target eNode B and target TMSE does not exist group calling downlink bearing, then target TMSE sends group calling context to target eNode B and sets up request message, for downlink bearing is set up in the group calling of this UE;
Response set up in the group calling context that target TMSE receiving target eNodeB sends.
Preferably, source TMSE sends switching command to after the eNodeB of source, and the method also comprises:
Source TMSE forwards from the eNodeB state transfer message of source eNodeB to target eNode B.
Preferably, when the TMSE served for UE changes, source TMSE to forward from the eNodeB state transfer message of source eNodeB to target eNode B, comprising:
Source TMSE receives the eNodeB state transfer message from source eNodeB;
Source TMSE sends forward access contextual information message to target TMSE;
Target TMSE sends forward access context acknowledge message to source TMSE;
Target TMSE sends eNodeB state transfer message to target eNode B.
Preferably, when the TMSE served for UE changes, after the handoff notification message that target TMSE receiving target eNodeB sends, the method also comprises:
Target TMSE sends forward reorientation and completes message to source TMSE;
Source TMSE sends forward reorientation and completes response message to target TMSE;
Target TMSE upgrades the carrying of UE and network side.
Preferably, source TMSE performs the contextual process of described UE on source of release eNodeB, comprising:
Source TMSE sends UE context release command message to source eNodeB;
Source TMSE receives the UE context Release complete that source eNodeB replys.
Preferably, after source TMSE performs the contextual process of described UE on source of release eNodeB, the method also comprises:
If do not have other UE of the cluster group belonging to described UE under the eNodeB of source, then source TMSE sends group calling context release command message to source eNodeB;
Source TMSE receives the group calling context Release complete that source eNodeB replys.
Preferably, after source TMSE performs the contextual process of described UE on source of release eNodeB, the method also comprises:
Source TMSE sends and deletes indirect data forwarding tunnel request message to target TMSE;
Target TMSE replys and deletes indirect data forwarding tunnel response message to target TMSE.
Correspondingly, in TMSE side, see Fig. 6, a kind of base station switching device shifter that the embodiment of the present invention provides, comprising:
Require to switch message reception units 11, the requirement that the source evolved base station eNodeB for being received as the service of this user equipment (UE) sends switches message;
Switch unit 12, for switching message according to described requirement, is switched to target eNode B by the base station served for UE by source eNodeB.
Preferably, described switch unit 12, specifically for:
Switch message according to described requirement, notification target eNodeB needs the switching carrying out source eNodeB and target eNode B;
Send switching command to source eNodeB, by source eNodeB, this switching command is sent to UE;
The handoff notification message that receiving target eNodeB sends, or when the TMSE served for UE changes, receive the handoff notification message of target eNode B transmission as target TMSE side joint, then perform tracing section updating process;
Delete the carrying of UE, and perform the contextual process of described UE on source of release eNodeB, thus realize the base station served for UE to be switched to target eNode B by source eNodeB.
Preferably, described switch unit 12, switches message according to described requirement, when notification target eNodeB needs the switching carrying out source eNodeB and target eNode B, specifically for:
Send handover request message to target eNode B, the handoff request acknowledgment message that receiving target eNodeB replys; Or,
When the TMSE served for UE changes, switch message according to described requirement, select target TMSE, send forward RELOCATION REQUEST message to target TMSE.
Preferably, this device also comprises:
Relocation process unit 13, for receiving the forward RELOCATION REQUEST message that source TMSE sends; According to described forward RELOCATION REQUEST message, for UE sets up new carrying; Send handover request message to target eNode B; The handoff request acknowledgment message that receiving target eNodeB replys.
Preferably, this device also comprises:
Request creates indirect data forwarding tunnel unit 14, for creating indirect data forwarding tunnel request message to target TMSE by sending, realizes setting up retransmitting paramater at target TMSE; And the establishment indirect data forwarding tunnel response message that receiving target TMSE replys;
Described switch unit is also for forward relocation response message that: receiving target TMSE sends.
Preferably, this device also comprises:
Creating indirect data forwarding tunnel response unit 15, for receiving the establishment indirect data forwarding tunnel request message that source TMSE sends, realizing setting up retransmitting paramater at target TMSE; And reply establishment indirect data forwarding tunnel response message to source TMSE;
Described relocation process unit 13, also for sending forward relocation response message to source TMSE.
Preferably, this device also comprises:
Unit is set up in group calling, if 16 for described UE, need to carry out group service, and there is not group calling downlink bearing in the S1 interface between target eNode B and target TMSE, then send group calling context to target eNode B and set up request message, for downlink bearing is set up in the group calling of this UE; And response set up in the group calling context that receiving target eNodeB sends.
Preferably, this device also comprises:
One eNodeB state transfer unit 17, for forwarding eNodeB state transfer message from source eNodeB to target eNode B.
Preferably, when the TMSE served for UE changes, an eNodeB state transfer unit 17 specifically for:
Receive the eNodeB state transfer message from source eNodeB;
Send forward access contextual information message to target TMSE;
The forward access context acknowledge message that receiving target TMSE sends.
Preferably, this device also comprises:
2nd eNodeB state transfer unit 18, for receiving the forward access contextual information message that source TMSE sends; Forward access context acknowledge message is sent to source TMSE; Send eNodeB state transfer message to target eNode B.
Preferably, described switch unit 12 when the TMSE for UE service change, when receiving the handoff notification message of target eNode B transmission as target TMSE side joint, also for:
Send forward reorientation and complete message to source TMSE;
The forward reorientation that reception source TMSE sends completes response message;
Upgrade the carrying of UE and network side.
Preferably, when described switch unit 12 performs the contextual process of described UE on source of release eNodeB, specifically for:
Send UE context release command message to source eNodeB;
The UE context Release complete that reception source eNodeB replys.
Preferably, after described switch unit 12 performs the contextual process of described UE on source of release eNodeB, also for:
If there is no other UE of the cluster group belonging to described UE under the eNodeB of source, then send group calling context release command message to source eNodeB;
The group calling context Release complete that reception source eNodeB replys.
Preferably, after described switch unit 12 performs the contextual process of described UE on source of release eNodeB, also for:
Send and delete indirect data forwarding tunnel request message to target TMSE;
The deletion indirect data forwarding tunnel response message that receiving target TMSE replys.
It should be noted that, above-mentioned each unit, can be arranged in same TMSE, and namely namely same TMSE can realize the function of the source TMSE of UE, also can complete the function of the target TMSE of UE.
In sum, the embodiment of the present invention proposes based on the S1 interface switching process under TD-LTE wideband multimedia aggregated structure, in S1 interface switching process, if the UE that request base station switches also is carrying out group service simultaneously, and there is not group calling downlink bearing in the S1 interface between target eNode B and target TMSE, then target TMSE sends group calling context to target eNode B and sets up request message, for downlink bearing is set up in the group calling of this user; If not other users of cluster group of carrying out of this user under the eNodeB of source, the group namely between source eNodeB and source TMSE carries necessity not, then source TMSE is to source eNodeB transmission group calling context release command message.Pass through the program, guarantee is in the cluster multi call user that EPS Connection Management connects (EPSConnectionManagement, ECM-CONNECTED) state, can manage simultaneously and ensure group calling downlink bearing in S1 interface switching process, reduce system signaling expense, and reduce handover delay.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (23)
1. a base station switch method, is characterized in that, the method comprises:
For the source cluster mobility session management entity TMSE of user equipment (UE) service, the requirement being received as the source evolved base station eNodeB transmission that this UE serves switches message;
Source TMSE switches message according to described requirement, and the base station served for UE is switched to target eNode B by source eNodeB;
Wherein, source TMSE switches message according to described requirement, the base station served is switched to target eNode B by source eNodeB, comprises for UE:
Source TMSE switches message according to described requirement, and notification target eNodeB needs the switching carrying out source eNodeB and target eNode B;
Source TMSE sends switching command to source eNodeB, by source eNodeB, this switching command is sent to UE;
The handoff notification message that source TMSE receiving target eNodeB sends, or when the TMSE served for UE changes, the handoff notification message that target TMSE receiving target eNodeB sends, then performs tracing section updating process;
Source TMSE deletes the carrying of UE, and performs the contextual process of described UE on source of release eNodeB, thus realizes the base station served for UE to be switched to target eNode B by source eNodeB.
2. method according to claim 1, is characterized in that, source TMSE switches message according to described requirement, and notification target eNodeB needs the switching carrying out source eNodeB and target eNode B, comprising:
When the TMSE served for UE changes, source TMSE switches message according to described requirement, select target TMSE, sends forward RELOCATION REQUEST message to target TMSE;
Target TMSE according to described forward RELOCATION REQUEST message, for UE sets up new carrying;
Target TMSE sends handover request message to target eNode B;
The handoff request acknowledgment message that target TMSE receiving target eNodeB replys.
3. method according to claim 2, is characterized in that, source TMSE is to after target TMSE sends forward RELOCATION REQUEST message, and the method also comprises:
Source TMSE creates indirect data forwarding tunnel request message to target TMSE by sending, and realizes setting up retransmitting paramater at target TMSE;
Target TMSE replys and creates indirect data forwarding tunnel response message to source TMSE;
Target TMSE sends forward relocation response message to source TMSE.
4. method according to claim 3, is characterized in that, target TMSE sends forward relocation response message to after the TMSE of source, and the method also comprises:
If described UE, need to carry out group service, and the S1 interface between target eNode B and target TMSE does not exist group calling downlink bearing, then target TMSE sends group calling context to target eNode B and sets up request message, for downlink bearing is set up in the group calling of this UE;
Response set up in the group calling context that target TMSE receiving target eNodeB sends.
5. method according to claim 1, is characterized in that, source TMSE sends switching command to after the eNodeB of source, and the method also comprises:
Source TMSE forwards from the eNodeB state transfer message of source eNodeB to target eNode B.
6. method according to claim 5, is characterized in that, when the TMSE served for UE changes, source TMSE to forward from the eNodeB state transfer message of source eNodeB to target eNode B, comprising:
Source TMSE receives the eNodeB state transfer message from source eNodeB;
Source TMSE sends forward access contextual information message to target TMSE;
Target TMSE sends forward access context acknowledge message to source TMSE;
Target TMSE sends eNodeB state transfer message to target eNode B.
7. method according to claim 1, is characterized in that, when the TMSE served for UE changes, after the handoff notification message that target TMSE receiving target eNodeB sends, the method also comprises:
Target TMSE sends forward reorientation and completes message to source TMSE;
Source TMSE sends forward reorientation and completes response message to target TMSE;
Target TMSE upgrades the carrying of UE and network side.
8. method according to claim 1, is characterized in that, source TMSE performs the contextual process of described UE on source of release eNodeB, comprising:
Source TMSE sends UE context release command message to source eNodeB;
Source TMSE receives the UE context Release complete that source eNodeB replys.
9. method according to claim 1, is characterized in that, after source TMSE performs the contextual process of described UE on source of release eNodeB, the method also comprises:
If do not have other UE of the cluster group belonging to described UE under the eNodeB of source, then source TMSE sends group calling context release command message to source eNodeB;
Source TMSE receives the group calling context Release complete that source eNodeB replys.
10. method according to claim 1, is characterized in that, after source TMSE performs the contextual process of described UE on source of release eNodeB, the method also comprises:
Source TMSE sends and deletes indirect data forwarding tunnel request message to target TMSE;
Target TMSE replys and deletes indirect data forwarding tunnel response message to target TMSE.
11. 1 kinds of base station switching device shifters, is characterized in that, this device comprises:
Require to switch message reception units, the requirement that the source evolved base station eNodeB for being received as user equipment (UE) service sends switches message;
Switch unit, for switching message according to described requirement, is switched to target eNode B by the base station served for UE by source eNodeB;
Wherein, described switch unit, specifically for:
Switch message according to described requirement, notification target eNodeB needs the switching carrying out source eNodeB and target eNode B;
Send switching command to source eNodeB, by source eNodeB, this switching command is sent to UE;
The handoff notification message that receiving target eNodeB sends, or when the TMSE served for UE changes, receive the handoff notification message of target eNode B transmission as target TMSE side joint, then perform tracing section updating process;
Delete the carrying of UE, and perform the contextual process of described UE on source of release eNodeB, thus realize the base station served for UE to be switched to target eNode B by source eNodeB.
12. devices according to claim 11, is characterized in that, described switch unit, switch message according to described requirement, when notification target eNodeB needs the switching carrying out source eNodeB and target eNode B, specifically for:
Send handover request message to target eNode B, the handoff request acknowledgment message that receiving target eNodeB replys; Or,
When the TMSE served for UE changes, switch message according to described requirement, select target TMSE, send forward RELOCATION REQUEST message to target TMSE.
13. devices according to claim 12, is characterized in that, this device also comprises:
Relocation process unit, for receiving the forward RELOCATION REQUEST message that source TMSE sends; According to described forward RELOCATION REQUEST message, for UE sets up new carrying; Send handover request message to target eNode B; The handoff request acknowledgment message that receiving target eNodeB replys.
14. devices according to claim 13, is characterized in that, this device also comprises:
Request creates indirect data forwarding tunnel unit, for creating indirect data forwarding tunnel request message to target TMSE by sending, realizes setting up retransmitting paramater at target TMSE; And the establishment indirect data forwarding tunnel response message that receiving target TMSE replys;
Described switch unit is also for forward relocation response message that: receiving target TMSE sends.
15. devices according to claim 14, is characterized in that, this device also comprises:
Creating indirect data forwarding tunnel response unit, for receiving the establishment indirect data forwarding tunnel request message that source TMSE sends, realizing setting up retransmitting paramater at target TMSE; And reply establishment indirect data forwarding tunnel response message to source TMSE;
Described relocation process unit, also for sending forward relocation response message to source TMSE.
16. devices according to claim 15, is characterized in that, this device also comprises:
Unit is set up in group calling, if for described UE, need to carry out group service, and there is not group calling downlink bearing in the S1 interface between target eNode B and target TMSE, then send group calling context to target eNode B and set up request message, for downlink bearing is set up in the group calling of this UE; And response set up in the group calling context that receiving target eNodeB sends.
17. devices according to claim 11, is characterized in that, this device also comprises:
One eNodeB state transfer unit, for forwarding eNodeB state transfer message from source eNodeB to target eNode B.
18. devices according to claim 17, is characterized in that, when the TMSE served for UE changes, an eNodeB state transfer unit specifically for:
Receive the eNodeB state transfer message from source eNodeB;
Send forward access contextual information message to target TMSE;
The forward access context acknowledge message that receiving target TMSE sends.
19. devices according to claim 18, is characterized in that, this device also comprises:
2nd eNodeB state transfer unit, for receiving the forward access contextual information message that source TMSE sends; Forward access context acknowledge message is sent to source TMSE; Send eNodeB state transfer message to target eNode B.
20. devices according to claim 11, is characterized in that, described switch unit when for UE service TMSE change, as target TMSE side joint receive target eNode B transmission handoff notification message time, also for:
Send forward reorientation and complete message to source TMSE;
The forward reorientation that reception source TMSE sends completes response message;
Upgrade the carrying of UE and network side.
21. devices according to claim 11, is characterized in that, when described switch unit performs the contextual process of described UE on source of release eNodeB, specifically for:
Send UE context release command message to source eNodeB;
The UE context Release complete that reception source eNodeB replys.
22. devices according to claim 11, is characterized in that, after described switch unit performs the contextual process of described UE on source of release eNodeB, also for:
If there is no other UE of the cluster group belonging to described UE under the eNodeB of source, then send group calling context release command message to source eNodeB;
The group calling context Release complete that reception source eNodeB replys.
23. devices according to claim 11, is characterized in that, after described switch unit performs the contextual process of described UE on source of release eNodeB, also for:
Send and delete indirect data forwarding tunnel request message to target TMSE;
The deletion indirect data forwarding tunnel response message that receiving target TMSE replys.
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| JP2019004197A (en) * | 2015-11-10 | 2019-01-10 | シャープ株式会社 | Terminal device, c-sgn, and communication control method |
| CN106937347B (en) * | 2015-12-29 | 2020-01-31 | 普天信息技术有限公司 | Group call switching method and system of cross-cluster core network |
| CN107820283B (en) * | 2016-09-13 | 2021-04-09 | 华为技术有限公司 | Network switching protection method, related equipment and system |
| CN107466067B (en) * | 2016-09-21 | 2021-11-02 | 海能达通信股份有限公司 | Group call service switching method, system, base station and terminal |
| CN108696907B (en) * | 2017-03-15 | 2020-10-30 | 普天信息技术有限公司 | Method for releasing cluster service triggered by terminal switching cell |
| CN108810988B (en) * | 2017-05-03 | 2020-12-01 | 华为技术有限公司 | Message transmission method and device |
| WO2018201973A1 (en) * | 2017-05-03 | 2018-11-08 | 华为技术有限公司 | Method and apparatus for message transmission |
| CN108966220B (en) | 2017-07-28 | 2019-07-23 | 华为技术有限公司 | A kind of method and the network equipment of secret key deduction |
| CN113133071B (en) * | 2020-01-16 | 2022-05-20 | 大唐移动通信设备有限公司 | Data forwarding method and base station |
| KR20230031243A (en) * | 2020-07-03 | 2023-03-07 | 지티이 코포레이션 | Methods for handling multicast/broadcast service sessions |
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