CN103428787A - Base station switching method and device - Google Patents
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Abstract
The invention discloses a base station switching method and device. The base station switching method and device are used for reducing system signaling overheads and shortening time required by an S1 interface switching process, thereby improving the efficiency for switching a base station serving for UE from a source eNodeB to a target eNodeB on the basis of an S1 interface. The base station switching method includes the steps that a source cluster mobility session management entity TMSE serving for the UE receives switching information sent by the source evolution type base station eNodeB; the source TMSE enables the base station serving for the UE to be switched from the source eNodeB into the target eNodeB according to the switching information.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of base station switch method and device.
Background technology
Evolved base station (the eNodeB defined in the LTE system of 3GPP standard, eNB) with the S1 interface of core-network side, switch, for X2 interface based between eNodeB, switch when unavailable, can initiate the switching between eNodeB based on the S1 interface reference point, this function needs reorientation mobile management entity (Mobile Management Entity for handoff procedure, MME), perhaps MME and gateway (Serving Gateway, S-GW) all need reorientation, or MME does not change, but the various scenes while between eNB, there is no X2 interface, concrete flow process as shown in Figure 1, comprise that step 1 is to step 21b.
In existing system, the S1 interface switching process of subscriber equipment (UE) determines which evolved packet system (Evolved Packet System by source eNodeB, EPS) carrying can be used for grouped data is forwarded to target eNode B, forwarding of packets comprises downlink grouped and upstream packet, and wherein the upstream packet forwarding is an option.Evolution block core (Evolved Packet Core, EPC) can't change the carrying list of the forwarding of packets of eNodeB decision.Forwarding of packets can adopt direct pass-through mode by X2 interface from source eNodeB to target eNode B, also can be indirectly by source S-GW and target S-GW, forward grouping.
In sum, in TD-LTE group system scheme of the prior art, the S1 interface switching process is not considered the management to original group calling carrying, and the system signaling expense is larger, and S1 interface switching process required time is longer.
Summary of the invention
The embodiment of the present invention provides a kind of base station switch method and device, in order to reduce the system signaling expense, reduces S1 interface switching process required time, thereby improve, based on the S1 interface, will be switched to the efficiency of target eNode B by source eNodeB for the base station of UE service.
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, be received as the requirement switching message of the source evolved base station eNodeB transmission of this UE service;
Source TMSE, according to described requirement switching message, will be switched to target eNode B by source eNodeB for the base station of UE service.
A kind of base station switching device shifter that the embodiment of the present invention provides comprises:
Require switching message sink unit, the requirement switching message sent for the source evolved base station eNodeB that is received as this user equipment (UE) service;
Switch unit, for according to described requirement switching message, will be switched to target eNode B by source eNodeB for the base station of UE service.
The embodiment of the present invention, be the source cluster mobility session management entity TMSE of user equipment (UE) service, is received as the requirement switching message of the source evolved base station eNodeB transmission of this UE service; Source TMSE is according to described requirement switching message, to be switched to target eNode B by source eNodeB for the base station of UE service, thereby reduced the system signaling expense, reduced S1 interface switching process required time, improved and will be switched to the efficiency of target eNode B by source eNodeB for the base station of UE service based on the S1 interface.
The 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 diagram 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
The embodiment of the present invention provides a kind of base station switch method and device, in order to reduce the system signaling expense, reduces S1 interface switching process required time, thereby improve, based on the S1 interface, will be switched to the efficiency of target eNode B by source eNodeB for the base station of UE service.
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 (Trunking Mobility Session Entity, TMSE), dispatch server, home subscriber server (Home Subscriber Server, HSS) and several parts 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) is realized by TMSE, and TMSE directly controls and has all TD-LTE base station equipments under its command, to reduce the Signalling exchange in group call establishment process.
In the described group system of the embodiment of the present invention, because the UE in handoff procedure may carry out the cluster multi call business simultaneously, so just need to carry out the group calling condition judgement at network side, and according to the descending group calling carrying between corresponding tactical management and eNodeB.
The network architecture of the embodiment of the present invention based on shown in Fig. 2, propose the S1 interface switching process based under this framework, and referring to Fig. 3, this process specifically comprises step:
A1, source eNodeB, according to X2 interface connection status and target eNode B connection status, determine to initiate source eNodeB and the switching between target eNode B (also can be called the switching of S1 interface) of a S1 interface based between eNodeB and TMSE.
Wherein, source eNodeB be receive the S1 interface handover request that UE initiates (hereinafter to be referred as UE, be the UE of this initiations S1 interface handover request) after, the S1 interface switching flow in triggering the present embodiment.
A2, source eNodeB send one and require switching message (Handover Required) to source TMSE, this message is carried switching type, directly validity, the source eNodeB of forward-path identify (TAI) and S1 Application Protocol (S1Application Protocol, S1AP) reason to transparent vessel, target eNode B sign, the target following district of target eNode B.
The carrying list of wherein, having indicated executing data to forward in transparent vessel.
Directly forward-path validity, indicated from source eNodeB to target eNode B whether can carry out direct data retransmission, the existence of its X2 interface based between source eNodeB and target eNode B.
The effect of target following district sign TAI is to be used to indicate to select suitable target TMSE.
A3, the requirement switching message that source TMSE sends according to source eNodeB, whether the TMSE that is judged as the UE service changes, if change, switch as requested the target eNode B sign of carrying in message, 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 (Radio Access Network, RAN) cause value, the target eNode B sign, target following district sign TAI, travelling carriage (MS) information changes behavior (if this sign effectively), and directly forward and identify.
The TMSE of A4, UE service if changes, need to carry out the TMSE reorientation, target TMSE divides target TMSE address and termination point of a tunnel sign (the Tunnel Endpoint Identifier of the upstream packet that is used in the S1-U interface between target eNode B and target TMSE, TEID), thus the UE that is embodied as the switching of request S1 interface sets up new carrying.
Being above-mentioned steps A3 and A4, is in the situation that need to carry out for the TMSE of UE service changes.
The TMSE of A5, UE service if changes, by target TMSE, to target eNode B, send handover request message, otherwise, can directly by source TMSE, to target eNode B, send handover request message, this handover request message is carried evolved packet system (the Evolved Packet System that will set up, EPS) carrying, user terminal Aggregate Maximum Bit Rate (UE-AggreGate Maximum Bit Rate, UE-AMBR), the S1AP cause value, source eNodeB is to the transparent vessel of target eNode B, and switching restriction list.
This handover request message creates the UE context in target eNode B, comprises beared information, safe context.For each EPS carrying, the EPS that set up carrying comprises target TMSE address and up TEID and the EPS bearer quality of service (Quality of Service, QoS) for user's face.
If directly forward mark indication, directly forward unavailablely, and target TMSE knows between source eNodeB and target eNode B that not having indirect data to forward connects, and will set up bearing parameter and must comprise and can not carry out the data retransmission indication.
The TMSE of A6, UE service if changes, and target eNode B sends a handoff request acknowledgment message to target TMSE, otherwise target eNode B sends handoff request acknowledgment message to source TMSE.
The carrying list that this handoff request acknowledgment message comprises switching type, switch reasons, foundation and set up failed carrying list and UE-AMBR.
The EPS carrying is set up in list and is included eNodeB service IP address and the TEID that target eNode B is S1-U interface up-downgoing grouping distribution, and the eNodeB service IP address and the TEID that for receiving forwarding data, distribute.If UE-AMBR changes, 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.
The TMSE of A7, UE service if changes, and source TMSE creates indirect data forwarding tunnel request message (the tunnel ID(TEIDs that this message comprises target eNode B address forward) by transmission) give target TMSE, in target, TMSE sets up retransmitting paramater.
A8, target TMSE respond and create indirect data forwarding tunnel response message (this message is carried cause value, and target eNode B is to the transparent vessel of source eNodeB, and list, target TMSE address and forward TEIDs are set up in the EPS carrying).
A9, corresponding with above-mentioned steps A3, the TMSE of UE service changes if, and target TMSE sends a forward relocation response message to source TMSE.If, with indirectly forwarding, this message comprises target TMSE address and the TEID forwarded for indirectly.
A10, corresponding with above-mentioned steps A2, source TMSE sends a switching command to source eNodeB.Carry out the bearing parameter of forwarding data, comprised the TMSE service IP address and the TEID list that distribute for data retransmission, the bearing parameter that discharge has comprised the carrying list that will discharge.
If the UE of A11 request S1 interface switching, also carrying out group service simultaneously, for example, in a group-call/multicast/individual calling, and there is not the group calling downlink bearing in the S1 interface between target eNode B and target TMSE, target TMSE sends the group calling context to target eNode B and sets up request message, for downlink bearing is set up in this user's group calling, this message comprises TMSE cluster group S1 Application of Interface sign (S1AP ID) (TMSE Trunking Group S1AP ID) and cluster group sign (Trunking Group Identify, TGID);
A12, target eNode B are set up request message according to the group calling context, for the descending TEID of collection group allocation, and respond the group calling context and set up response, wherein, comprise TMSE Trunking Group S1AP ID and eNB cluster group S1AP ID(eNB Trunking Group S1AP ID);
A13, corresponding with above-mentioned steps A10, source eNodeB sends switching command to UE, concrete, can use transparent vessel structure switching command (Handover Command) message of target eNode B to source eNodeB, send to UE(to ask the UE of S1 interface switching switching command).
When UE receives this switching command message, will delete the unacceptable any EPS carrying of Target cell.
A14, source eNodeB are through source TMSE(or source TMSE and target TMSE) send eNodeB state transfer message to target eNode B, the RAB of the evolution that this message transmission is preserved (Evolved-Radio Access bearer, E-RAB) corresponding PDCP (Packet Data Converagence Protocol, PDCP) and Hyper Frame Number (Hyper-Frame Number, HFN) state information.
If neither one E-RAB adopts PDCP state preservation mechanism, source eNodeB may omit and send this message.
The TMSE of A15, UE service if changes, and source TMSE sends forward access context notification message (Forward Access Context Notification) to target TMSE, and this message comprises RAB context, E-UTRAN transmission container;
A16, target TMSE send forward access context acknowledge message (Forward Access Context Acknowledge) to source TMSE, wherein carry cause value.
A17, source TMSE or target TMSE send eNodeB state transfer (eNodeB Status Transfer) 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 essential step of S1 interface switching flow.
A18, after UE successfully is synchronized to Target cell, just send a switching and confirm that (Handover Confirm) 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 (Handover Notify(carries TAI+ECGI)) message is to target TMSE.
A20, corresponding with above-mentioned steps A9, the TMSE of UE service changes if, and target TMSE sends the forward reorientation and completes (Forward Relocation Complete) message to source TMSE.
A21, conduct response, source TMSE sends a forward reorientation and completes response message to target TMSE.Start at source TMSE the release conditions that a timer monitors the resource of source eNodeB and source TMSE.Complete response message once receive the forward reorientation, target TMSE starts a timer and carries out for monitoring user's face resource that the indirect target TMSE forwarded distributes.
A22, target TMSE revise the carrying of UE and network side; Target TMSE is that downlink business distributes address and a TEID principle Resources allocation according to a carrying.
A23. after steps A 19, when meeting one of TAU renewal trigger condition, UE initiates a tracing section updating (Tracking Area Update, TAU) process.Target TMSE knows it is a handoff procedure of carrying out for this UE, because it is by switching message sink to bearer context, thereby the just subset of TAU process of target TMSE execution, particularly do not carry out 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, after the A21 step starts timer expiry, source TMSE sends UE context release command (UE Context Release Command), and message is to source eNodeB, this message is carried release cause.
A26, source eNodeB discharge the resource relevant to UE and respond a UE context and discharged (UE Context Release Complete) message.
If other users of the cluster group that under the eNodeB of A27 source, this user does not carry out, i.e. the carrying of group between source eNodeB and TMSE necessity not, source TMSE sends group calling context release command message to source eNodeB;
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 is carried TMSE Trunking Group S1AP ID and eNB Trunking Group S1AP ID.
Steps A 27 and A28 are the steps corresponding with above-mentioned steps A11 and A12.
A29, after steps A 26, if use indirectly, forward, the timer expiry that source TMSE starts in the A21 step, source TMSE sends deletion indirect data forwarding tunnel request (Delete Indirect Data Forwarding Tunnel Request) message and comes release steps A7 for indirectly forwarding the temporary resource distributed to target TMSE.
A30, target TMSE reply deletion indirect data forwarding tunnel response (Delete Indirect Data Forwarding Tunnel Response) message and come 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, mutual flow process between source TMSE and target TMSE, in the situation that carry out for the TMSE of the UE service of request S1 interface switching changes, if the TMSE of the UE service of request S1 interface switching does not change, do not have flow process mutual between source TMSE and target TMSE, the interaction flow of above-mentioned all target TMSE and base station side, be the interaction flow of source TMSE and base station side.
Above-mentioned TAU process, specifically referring to Fig. 4, comprising:
B1.UE is to new eNodeB(eNb-new, i.e. above-mentioned target eNode B) send the tracing section updating request message, to initiate the TAU process, wherein carry the RRC parameter, this RRC parameter comprises old TMSE (above-mentioned the 2nd TMSE) sign, and the PLMN sign.
B2. the new eNodeB network parameter TAI selected that old TMSE identifies and indicates from the RRC parameter, obtain the above-mentioned TMSE of new TMSE() sign, or if can not get new TMSE sign, new eNodeB just selects a TMSE.Then, new eNodeB forward TAU request message is given new TMSE, the old global unique temporary identity (Old GUTI) of wherein carrying TAI, ECGI parameter and UE.
B3. new TMSE carries out the integrity protection checking to the TAU request message; if the TAU request message is carried out to integrity protection 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 confirms sign.New TMSE sends context request message to old TMSE, in order to obtain user profile.New TMSE is from old global unique temporary identity (Globally Unique Temporary Identity, GUTI) in, obtain the unique mobile management entity in the old whole world (Mobile Management Entity, MME) sign (Globally Unique MME Identifier, GUMMEI).
B4. the context request message that old TMSE sends new TMSE is carried out integrity protection checking (this checking algorithm is continued to use the checking algorithm of existing 3GPP standard), if be proved to be successful, old TMSE returns to context response information, this message comprises IMSI, the travelling carriage PSTN/ISDN of country number (MS international PSTN/ISDN number, MSISDN), no EPS authentication vector, connection security management entity key set identifier (Key Set Identifier Access Security Management Entity, KSIASME), connection security management entity key (Key Access Security Management Entity, KASME), the EPS bearer context, gateway (Serving GW) signaling address, one or more termination point of a tunnel sign (Tunnel Endpoint Identifier, TEID), travelling carriage (MS) information changes report, UE core net network capabilities, and UE discontinuous reception (DRX) parameter.
If the B5. integrity checking of TAU request message failure, the authentication process for UE that new TMSE must initiate to be undertaken by HSS and ciphering process (these two processes all adopt the respective process of existing 3GPP standard definition).
B6. new TMSE sends context acknowledge message to old TMSE, and wherein this message comprises cause value and Sering GW change indication.Old TMSE hereinafter marks gateway and home subscriber server (Home Subscriber Serer thereon, HSS) information in is invalid, thereby guaranteed before completing the TAU process more new gateway and HSS when UE gets back to old TMSE and initiates the TAU process.
B6-1, new TMSE basis are received context response information, upgrade the carrying of UE;
B7, if the UE of request TAU is also carrying out group service simultaneously, for example, in a group-call/multicast/individual calling, and there is not the group calling downlink bearing in the S1 interface between new eNodeB and new TMSE, new TMSE sends the 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(S1AP ID) (TMSE Trunking Group S1AP ID) and cluster group sign (Trunking Group Identify, TGID),
B8, new eNodeB set up the TGID in request message according to the group calling context, for collection group allocation downlink tunnel terminal sign (Tunnel Endpoint Identifier, TEID), and respond the group calling context and set up response, wherein, comprise TMSE Trunking Group S1AP ID and eNB cluster group S1AP ID(eNB Trunking Group S1AP ID);
If the eNodeB(eNb-old that B9 is old, be above-mentioned source eNodeB) under other UE except this UE in the cluster group under this UE not, be the group carrying necessity not between source eNodeB and old TMSE, old TMSE sends group calling context release command message to source eNodeB, and this message is carried TMSE Trunking Group S1AP ID and eNB Trunking Group S1AP ID;
B10, source eNodeB delete the bearer context of this cluster group after receiving group calling context release command message, and return to group calling context Release complete to old TMSE.
B11. the beared information carried in the context response information of new TMSE according to old TMSE response, evolved packet system the UE loading context information that inspection obtains from old TMSE (Evolved Packet System, EPS) loaded state parameter, according to this EPS loaded state parameter, release does not have the EPS of activation to carry and upgrades the EPS carrying; And new TMSE sends position updating request to HSS, for upgrading user's position data.
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 that message (wherein carrying updating type and the IMSI of MME_UPDATE_PROCEDURE (0)) is deleted in position, delete the record that is kept at this user in old TMSE, and reply position to HSS and delete response message.
After B14.HSS receives that response message is deleted in position, respond position to new TMSE and upgrade response message, this message is carried IMSI and subscription data (Subscription Data).
If B15. due to regional subscription restriction or access limitation, new TMSE does not allow UE to be linked into tracing area (the Tracking Area of its selection, TA) zone, new TMSE be take tracking area and is not allowed (Tracking Area not allowed) as reason refusal TAU request message.Otherwise new TMSE responds tracing section updating to UE and accepts message, carries GUTI, TAI list (list), EPS loaded state (bearer status), NAS serial number (sequence number) and NAS-MAC in this message.
If B16. the TMSE(under UE is the TMSE of UE service) change, new TMSE can distribute new GUTI to UE, change has occurred with regard to the GUTI that means UE in this, at this time UE need to upgrade acceptance response message to new TMSE by the returning tracking district, to confirm the tracing section updating process, completes.
As can be seen here, in the TMSE side, referring to Fig. 5, a kind of base station switch method that the embodiment of the present invention provides comprises step:
S101, be the source cluster mobility session management entity TMSE of user equipment (UE) service, be received as the requirement switching message that the source evolved base station eNodeB of this UE service sends;
S102, source TMSE, according to described requirement switching message, will be switched to target eNode B by source eNodeB for the base station of UE service.
Preferably, source TMSE, according to described requirement switching message, will be switched to target eNode B by source eNodeB for the base station of UE service, comprise:
Source TMSE is according to described requirement switching message, and notification target eNodeB need to carry out the switching of 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 for the UE service changes, the handoff notification message that target TMSE receiving target eNodeB sends, then carry out the tracing section updating process;
Source TMSE deletes the carrying of UE, and carries out the contextual process of the above UE of source of release eNodeB, thereby realizes being switched to target eNode B by source eNodeB for the base station of UE service.
Preferably, source TMSE is according to described requirement switching message, and notification target eNodeB need to carry out the switching of source eNodeB and target eNode B, comprising:
When the TMSE for the UE service changes, source TMSE is according to described requirement switching message, and select target TMSE, send the forward RELOCATION REQUEST message to target TMSE;
Target TMSE is 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 after target TMSE sends the forward RELOCATION REQUEST message, and the method also comprises:
Source TMSE creates indirect data forwarding tunnel request message to target TMSE by transmission, 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 the forward relocation response message to source TMSE.
Preferably, target TMSE sends the 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 there is not the group calling downlink bearing in the S1 interface between target eNode B and target TMSE, target TMSE sends the 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 eNodeB state transfer message from source eNodeB to target eNode B.
Preferably, when the TMSE for UE service changes, source TMSE forwards eNodeB state transfer message from source eNodeB to target eNode B, comprising:
Source TMSE receives the eNodeB state transfer message from source eNodeB;
Source TMSE sends forward access context notification 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 for the UE service changes, after the handoff notification message that target TMSE receiving target eNodeB sends, the method also comprises:
Target TMSE sends the forward reorientation and completes message to source TMSE;
Source TMSE sends the forward reorientation and completes response message to target TMSE;
Target TMSE upgrades the carrying of UE and network side.
Preferably, source TMSE carries out the contextual process of the above UE of source of release eNodeB, comprising:
Source TMSE sends UE context release command message to source eNodeB;
The UE context Release complete that source TMSE reception sources eNodeB replys.
Preferably, after source TMSE carries out the contextual process of the above UE of source of release eNodeB, the method also comprises:
If there is no other UE of the cluster group under described UE under the eNodeB of source, source TMSE sends group calling context release command message to source eNodeB;
The group calling context Release complete that source TMSE reception sources eNodeB replys.
Preferably, after source TMSE carries out the contextual process of the above UE of 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 the TMSE side, referring to Fig. 6, a kind of base station switching device shifter that the embodiment of the present invention provides comprises:
Require switching message sink unit 11, the requirement switching message sent for the source evolved base station eNodeB that is received as this user equipment (UE) service;
Preferably, described switch unit 12, specifically for:
According to described requirement switching message, notification target eNodeB need to carry out the switching of 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 for the UE service changes, as target TMSE side joint, receive the handoff notification message that target eNode B sends, then carry out the tracing section updating process;
Delete the carrying of UE, and carry out the contextual process of the above UE of source of release eNodeB, thereby realize being switched to target eNode B by source eNodeB for the base station of UE service.
Preferably, described switch unit 12, according to described requirement switching message, when notification target eNodeB need to carry out the switching of 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; Perhaps,
When the TMSE for the UE service changes, according to described requirement switching message, select target TMSE, send the forward RELOCATION REQUEST message to target TMSE.
Preferably, this device also comprises:
Preferably, this device also comprises:
Request creates indirect data forwarding tunnel unit 14, for creating indirect data forwarding tunnel request message by transmission to target TMSE, realizes setting up retransmitting paramater at target TMSE; And the establishment indirect data forwarding tunnel response message of receiving target TMSE reply;
The forward relocation response message that described switch unit also sends for: receiving target TMSE.
Preferably, this device also comprises:
Create indirect data forwarding tunnel response unit 15, the establishment indirect data forwarding tunnel request message sent for reception sources TMSE, realize 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 the 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 the group calling downlink bearing in the S1 interface between target eNode B and target TMSE, to target eNode B, send the group calling context 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:
The one eNodeB state transfer unit 17, for forwarding eNodeB state transfer message from source eNodeB to target eNode B.
Preferably, when the TMSE for UE service changes, an eNodeB state transfer unit 17 specifically for:
Reception is from the eNodeB state transfer message of source eNodeB;
Send forward access context notification message to target TMSE;
The forward access context acknowledge message that receiving target TMSE sends.
Preferably, this device also comprises:
The 2nd eNodeB state transfer unit 18, the forward sent for reception sources TMSE access context notification message; Send forward access context acknowledge message to source TMSE; Send eNodeB state transfer message to target eNode B.
Preferably, described switch unit 12 changes as the TMSE for the UE service, while as target TMSE side joint, receiving the handoff notification message that target eNode B sends, also for:
Send the forward reorientation and complete message to source TMSE;
The forward reorientation that reception sources TMSE sends completes response message;
Upgrade the carrying of UE and network side.
Preferably, when described switch unit 12 is carried out the contextual process of the above UE of source of release eNodeB, specifically for:
Send UE context release command message to source eNodeB;
The UE context Release complete that reception sources eNodeB replys.
Preferably, after described switch unit 12 is carried out the contextual process of the above UE of source of release eNodeB, also for:
If there is no other UE of the cluster group under described UE under the eNodeB of source, to source eNodeB, send group calling context release command message;
The group calling context Release complete that reception sources eNodeB replys.
Preferably, after described switch unit 12 is carried out the contextual process of the above UE of 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 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 has proposed the S1 interface switching process based under TD-LTE wideband multimedia aggregated structure, in the S1 interface switching process, if the UE of request base station switching is also carrying out group service simultaneously, and there is not the group calling downlink bearing in the S1 interface between target eNode B and target TMSE, target TMSE sends the group calling context to target eNode B and sets up request message, for downlink bearing is set up in this user's group calling; If other users of the cluster group that under the eNodeB of source, this user does not carry out, i.e. the carrying of group between source eNodeB and source TMSE necessity not, source TMSE sends group calling context release command message to source eNodeB.By this scheme, assurance connects the cluster multi call user of (EPS Connection Management, ECM-CONNECTED) state in EPS Connection Management, in the S1 interface switching process, can manage simultaneously and guarantee the group calling downlink bearing, reduce the 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 complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code one or more.
The present invention describes with reference to flow chart and/or the block diagram of method, equipment (system) and computer program according to the embodiment of the present invention.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction be stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out on computer or other programmable devices is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (25)
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, be received as the requirement switching message of the source evolved base station eNodeB transmission of this UE service;
Source TMSE, according to described requirement switching message, will be switched to target eNode B by source eNodeB for the base station of UE service.
2. method according to claim 1, is characterized in that, source TMSE, according to described requirement switching message, will be switched to target eNode B by source eNodeB for the base station of UE service, comprise:
Source TMSE is according to described requirement switching message, and notification target eNodeB need to carry out the switching of 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 for the UE service changes, the handoff notification message that target TMSE receiving target eNodeB sends, then carry out the tracing section updating process;
Source TMSE deletes the carrying of UE, and carries out the contextual process of the above UE of source of release eNodeB, thereby realizes being switched to target eNode B by source eNodeB for the base station of UE service.
3. method according to claim 2, is characterized in that, source TMSE is according to described requirement switching message, and notification target eNodeB need to carry out the switching of source eNodeB and target eNode B, comprising:
When the TMSE for the UE service changes, source TMSE is according to described requirement switching message, and select target TMSE, send the forward RELOCATION REQUEST message to target TMSE;
Target TMSE is 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.
4. method according to claim 3, is characterized in that, source TMSE is after target TMSE sends the forward RELOCATION REQUEST message, and the method also comprises:
Source TMSE creates indirect data forwarding tunnel request message to target TMSE by transmission, 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 the forward relocation response message to source TMSE.
5. method according to claim 4, is characterized in that, target TMSE sends the 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 there is not the group calling downlink bearing in the S1 interface between target eNode B and target TMSE, target TMSE sends the 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.
6. method according to claim 2, is characterized in that, source TMSE sends switching command to after the eNodeB of source, and the method also comprises:
Source TMSE forwards eNodeB state transfer message from source eNodeB to target eNode B.
7. method according to claim 6, is characterized in that, when the TMSE for UE service changes, source TMSE forwards eNodeB state transfer message from source eNodeB to target eNode B, comprising:
Source TMSE receives the eNodeB state transfer message from source eNodeB;
Source TMSE sends forward access context notification 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.
8. method according to claim 2, is characterized in that, when the TMSE for the UE service changes, after the handoff notification message that target TMSE receiving target eNodeB sends, the method also comprises:
Target TMSE sends the forward reorientation and completes message to source TMSE;
Source TMSE sends the forward reorientation and completes response message to target TMSE;
Target TMSE upgrades the carrying of UE and network side.
9. method according to claim 2, is characterized in that, source TMSE carries out the contextual process of the above UE of source of release eNodeB, comprising:
Source TMSE sends UE context release command message to source eNodeB;
The UE context Release complete that source TMSE reception sources eNodeB replys.
10. method according to claim 2, is characterized in that, after source TMSE carries out the contextual process of the above UE of source of release eNodeB, the method also comprises:
If there is no other UE of the cluster group under described UE under the eNodeB of source, source TMSE sends group calling context release command message to source eNodeB;
The group calling context Release complete that source TMSE reception sources eNodeB replys.
11. method according to claim 2, is characterized in that, after source TMSE carries out the contextual process of the above UE of 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.
12. a base station switching device shifter, is characterized in that, this device comprises:
Require switching message sink unit, the requirement switching message sent for the source evolved base station eNodeB that is received as this user equipment (UE) service;
Switch unit, for according to described requirement switching message, will be switched to target eNode B by source eNodeB for the base station of UE service.
13. device according to claim 12, is characterized in that, described switch unit, specifically for:
According to described requirement switching message, notification target eNodeB need to carry out the switching of 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 for the UE service changes, as target TMSE side joint, receive the handoff notification message that target eNode B sends, then carry out the tracing section updating process;
Delete the carrying of UE, and carry out the contextual process of the above UE of source of release eNodeB, thereby realize being switched to target eNode B by source eNodeB for the base station of UE service.
14. device according to claim 13, is characterized in that, described switch unit, and according to described requirement switching message, when notification target eNodeB need to carry out the switching of 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; Perhaps,
When the TMSE for the UE service changes, according to described requirement switching message, select target TMSE, send the forward RELOCATION REQUEST message to target TMSE.
15. device according to claim 14, is characterized in that, this device also comprises:
The relocation process unit, the forward RELOCATION REQUEST message sent for reception sources TMSE; 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.
16. device according to claim 15, is characterized in that, this device also comprises:
Request creates indirect data forwarding tunnel unit, for creating indirect data forwarding tunnel request message by transmission to target TMSE, realizes setting up retransmitting paramater at target TMSE; And the establishment indirect data forwarding tunnel response message of receiving target TMSE reply;
The forward relocation response message that described switch unit also sends for: receiving target TMSE.
17. device according to claim 16, is characterized in that, this device also comprises:
Create indirect data forwarding tunnel response unit, the establishment indirect data forwarding tunnel request message sent for reception sources TMSE, realize 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 the forward relocation response message to source TMSE.
18. device according to claim 17, 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 the group calling downlink bearing in the S1 interface between target eNode B and target TMSE, to target eNode B, send the group calling context 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.
19. device according to claim 13, is characterized in that, this device also comprises:
The one eNodeB state transfer unit, for forwarding eNodeB state transfer message from source eNodeB to target eNode B.
20. device according to claim 19, is characterized in that, when the TMSE for UE service changes, an eNodeB state transfer unit specifically for:
Reception is from the eNodeB state transfer message of source eNodeB;
Send forward access context notification message to target TMSE;
The forward access context acknowledge message that receiving target TMSE sends.
21. device according to claim 20, is characterized in that, this device also comprises:
The 2nd eNodeB state transfer unit, the forward sent for reception sources TMSE access context notification message; Send forward access context acknowledge message to source TMSE; Send eNodeB state transfer message to target eNode B.
22. device according to claim 13, is characterized in that, described switch unit changes as the TMSE for UE service, while as target TMSE side joint, receiving the handoff notification message that target eNode B sends, also for:
Send the forward reorientation and complete message to source TMSE;
The forward reorientation that reception sources TMSE sends completes response message;
Upgrade the carrying of UE and network side.
23. device according to claim 13, is characterized in that, when described switch unit is carried out the contextual process of the above UE of source of release eNodeB, specifically for:
Send UE context release command message to source eNodeB;
The UE context Release complete that reception sources eNodeB replys.
24. device according to claim 13, is characterized in that, after described switch unit is carried out the contextual process of the above UE of source of release eNodeB, also for:
If there is no other UE of the cluster group under described UE under the eNodeB of source, to source eNodeB, send group calling context release command message;
The group calling context Release complete that reception sources eNodeB replys.
25. device according to claim 13, is characterized in that, after described switch unit is carried out the contextual process of the above UE of 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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