CN101553017A

CN101553017A - Method for controlling resource release, network element device and network system

Info

Publication number: CN101553017A
Application number: CNA2008100898654A
Authority: CN
Inventors: 孙晓姬; 吴问付
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2008-04-03
Filing date: 2008-04-03
Publication date: 2009-10-07
Anticipated expiration: 2028-04-03
Also published as: CN101553017B

Abstract

The invention discloses a method for controlling resource release, a network element device and a network system. The method for controlling resource release comprises: controlling a base station to reject to delete the context information of a user equipment (UE) when the UE transfers from a source-side mobile management entity (MME) to a new-side MME and when the transfer of the UE is confirmed to be caused by the load balance of the source-side MME. The user side can not be interrupted by using the technical proposal of the embodiment of the invention.

Description

Method, network element device and network system that the control resource discharges

Technical field

The present invention relates to communication technical field, particularly method, network element device and the network system of the release of control resource.

Background technology

The core net of wireless evolution network mainly comprises Mobility Management Entity (Mobile ManagementEntity, MME), gateway (Serving Gateway, S-GW), packet data gateway (PacketData Network Gateway, P-GW) three logic function bodies, wherein, MME is a mobile management entity, being responsible for Non-Access Stratum NAS signaling encrypts and roams, functions such as tracking, distributing user temporary identity sign, safety function etc., it is corresponding to current universal mobile telecommunications system (Universal MobileTelecommunication System, UMTS) inner Serving GPRS Support Node (Serving GPRSSupport Node, control plane part SGSN).S-GW is responsible for the local mobility anchor point and the mobility anchor point and the Lawful Interception relevant information of 3GPP internal system; P-GW then is responsible for strategy execution and charging and Lawful Interception correlation function.

(Evolved Packet System EPS), has introduced " Pool district " this notion, and the parallel operation of a plurality of MME and S-GW is arranged in the Pool district, and they share the business in Pool district jointly at the packet network of evolution.The Radio Resource that UE is in the Pool district covers down, can be served by any one MME in this Pool district.

In the EPS network, for the user of Active state, the load that can use TAU flow process or switching flow to finish between MME moves, and promptly UE is moved to new side MME from source MME.

In research and practice process to prior art, the inventor finds that there is following problem in prior art:

In the TAU of above-mentioned prior art flow process or switching flow, after the target side Internet resources are set up, can discharge the base station and be connected with S1 between source MME, then all S1 user plane bearer can discharge on the S-GW of source; And the RRC between UE and the base station connects also and can discharge along with the release of S1 connection, thereby cause the radio bearer RB between UE and the base station to discharge, then (the Radio Access Bear of the RAB between UE and the core net, RAB) carrying disconnects, because the RAB carrying is to be based upon to be used for bearer service on the basis of radio bearer RB.In sum, the S1 connection resource disconnects, and can cause all user's face resources to disconnect, thereby cause service disconnection.

Summary of the invention

The technical problem that the embodiment of the invention will solve provides a kind of method, network element device and the network system that can control resource release, does not interrupt to guarantee user's face.

In view of this, the embodiment of the invention provides a kind of method that resource discharges of controlling, and this method comprises:

When user equipment (UE) from source Mobility Management Entity MME during to new side MME migration,

Confirm because the load balancing of described source MME when causing described UE migration,

The contextual information of the described UE of control base station refusal deletion.

The method that the embodiment of the invention also provides another kind of control resource to discharge, this method comprises:

The base station is known because the load balancing of source MME makes UE need move to new side MME, for described UE distributes one to be used to discern the sign that described new side MME is connected with inter-base station interface and to send to described new side MME, receive the sign that is used to discern described interface connection that described new side MME distributes, be the newly-built context of described UE, described newly-built context comprises: described base station is the sign that is used to discern described interface connection that described UE distributes, and is the sign that recognition interface is connected that is used for of described UE distribution with described new side MME.

The embodiment of the invention also provides a kind of network element device, and this network element device comprises:

Confirmation unit is used for during to new side MME migration, confirming because the load balancing of described source MME causes described UE migration from source Mobility Management Entity MME when user equipment (UE);

Control unit is used for confirming because after the load balancing of described source MME causes described UE migration the contextual information of the described UE of control base station refusal deletion.

The embodiment of the invention also provides another kind of network element device, and this network element device comprises:

Confirmation unit is used to confirm because the load balancing of source MME makes UE need move to new side MME;

The new logo transmitting element is used to described UE to distribute one to be used to discern the sign that described new side MME is connected with inter-base station interface and to send to described new side MME;

New side MME sign receiving element, being used to receive described new side MME is the sign that is used to discern described interface connection that described UE distributes;

The unit set up in the UE context, be used to the newly-built context of described UE, described newly-built context comprises: described base station is the sign that is used to discern described interface connection that described UE distributes, and is the sign that recognition interface is connected that is used for of described UE distribution with described new side MME.

The present invention also provides a kind of network system, and this network system comprises: source MME, base station, wherein,

Described source MME, be used for when UE from source MME during to new side MME migration, confirm because the load balancing of described source MME when causing described UE migration the contextual information of the described UE of control base station refusal deletion.

A technical scheme in the technique scheme has following beneficial effect:

When source MME carried out load balancing, the contextual information of the UE that is associated with source MME was not deleted in the control base station in the embodiment of the invention, did not disconnect to guarantee the S1 connection resource, did not lose thereby user's face does not interrupt data.

Another technical scheme in the technique scheme has following beneficial effect:

The base station is being known because after the load balancing of source MME makes the UE migration in the embodiment of the invention, for this UE newly-built a cover context, do not disconnect to guarantee the S1 connection resource, do not lose thereby user's face does not interrupt data.

Description of drawings

The method signaling diagram that the control resource that Fig. 1 provides for the embodiment of the invention one discharges;

The method signaling diagram that the control resource that Fig. 2 provides for the embodiment of the invention three discharges;

The method signaling diagram that the control resource that Fig. 3 provides for the embodiment of the invention four discharges;

The method signaling diagram that the control resource that Fig. 4 provides for the embodiment of the invention five discharges;

The method signaling diagram that the control resource that Fig. 5 provides for the embodiment of the invention six discharges;

The method signaling diagram that the control resource that Fig. 6 provides for the embodiment of the invention seven discharges;

The method signaling diagram that the control resource that Fig. 7 provides for the embodiment of the invention eight discharges;

The method signaling diagram that the control resource that Fig. 8 provides for the embodiment of the invention nine discharges;

The method signaling diagram that the control resource that Fig. 9 provides for the embodiment of the invention ten discharges;

The method signaling diagram that the control resource that Figure 10 provides for the embodiment of the invention 11 discharges;

The method signaling diagram that the control resource that Figure 11 provides for the embodiment of the invention 12 discharges;

The method signaling diagram that the control resource that Figure 12 provides for the embodiment of the invention 13 discharges;

The method signaling diagram that the control resource that Figure 13 provides for the embodiment of the invention 14 discharges;

The network element device structure chart that Figure 14 provides for the embodiment of the invention 15;

The network element device structure chart that Figure 15 provides for the embodiment of the invention 16.

Embodiment

The embodiment of the invention provides a kind of method that resource discharges of controlling, comprise: when user equipment (UE) from source Mobility Management Entity MME during to new side MME migration, confirm because the load balancing of described source MME when causing described UE migration the contextual information of the described UE of control base station refusal deletion.Wherein, confirm because the load balancing of source MME causes the UE migration can be to determine according to the received load migration request of carrying the load balancing indication information, wherein, the load migration request can be TAU request, handoff request, forwarding handoff request message etc.; Wherein, the load balancing indication information can be that LoadBalancing Indicator or Cause cause value are represented Load Balancing.Use the technical scheme of the embodiment of the invention, can make the base station preserve the contextual information of UE, do not interrupt to guarantee user's face.

Consult Fig. 1, the embodiment of the invention one provides a kind of method that resource discharges of controlling, eNodeB is by the load balancing situation of each MME on the S1 interface or the load migration order of source MME transmission in this method, affirmation need be arrived new side MME with the load migration of source MME, then initiate to carry the handoff request of load balancing indication Load Balancing Indicator to source MME, to inform that current user's switching is what to be caused by the load migration between MME, thereby source MME does not initiate to ask to discharge the message that S1 connects in follow-up flow process, makes the base station not delete the contextual information of the UE that is associated with source MME.This method specifically comprises:

Step 101, source MME carry out load at needs and heavily divide timing, send the load migration order to the eNodeB of association, and notice eNodeB switches the certain user.If when the load state of eNodeB by the S1 interface can this MME of perception need carry out load migration, then this step can be omitted.

Step 102, eNodeB send handoff request Handover required to source MME, carry load balancing indication Load Balancing Indicator in this message, to inform that source MME must not initiate resource release flow notice eNodeB and S-GW (if S-GW is constant) discharges the UE resource, wherein, carry eNB S1-AP UE ID (eNodeB being used to of distributing discerned the sign that the S1 interface is connected between eNodeB and MME), Source ID and Target ID among the Handover required, wherein, Source ID and Target ID are this eNodeB ID.

Step 103, source MME are according to Load Balancing Indicator, know and currently carrying out the load balancing flow process and must not initiate the S1 connection resource discharging flow process, according to resource situation in the Pool, select new side MME, according to eNB S1-AP UE ID, obtain the contextual information of UE, send forwarding handoff request Forward Relocation Request to new side MME, carry the contextual information of UE in this message, wherein, the contextual information of UE comprises: P-GW address, P-GW Tunnel Identifier (PGW TEID), source S-GW address, source S-GW TEID.

Whether step 104, new side MME can insert source S-GW according to source S-GW Address Confirmation oneself, if can not, from network, select new side S-GW and set up corresponding bearer context (this process is omitted among the figure).New side MME sent handoff request HandoverRequest to eNodeB after foundation was finished, and carried in the Handover Request message: MME S1-AP UE ID (sign that is used to discern the connection of S1 interface that new side MME distributes) new side S-GW address and new side S-GW TEID.

Step 105, eNodeB send handoff response Handover Request Ack to new side MME, carry eNB S1-AP UE ID among this Handover Request Ack.

Step 106, new side MME send and transmit handoff response Forward Relocation Response message to source MME, carry Serving GW change indication in this message, know by this indication whether user's service S-GW changes.

Step 107, new side MME send switching command Handover Command to eNodeB.

Step 108, eNodeB send switching indication Handover Notify for new side MME.

Step 109, new side MME send the forwarding handoff response and finish Forward Relocation Complete message to source MME.

Step 110, source MME transmission forwarding handoff response are finished and are replied Forward RelocationComplete Ack to new side MME.Because source MME receives Load balancingindicator indication in step 102, so can not sending, source MME do not discharge upward this user's S1 connection resource of resource request message request eNodeB deletion eNodeB, if knowing service S-GW in the step 106 does not change, then can not send more new bearer request to S-GW request deletion S1-U carrying, otherwise source MME request S-GW deletion S-GW goes up user's bearing resource.

If step 111-step 114 source S-GW is different with new side S-GW, then upgrade the bearer context that P-GW and new side S-GW go up UE.

Step 115, UE occurrence positions change, and send tracing section updating request TAU to new side MME.

Step 116, new side MME are to the HSS registration related information; HSS sends CancelLocation message to source MME, the context of source MME deletion UE.

Because source MME receives Load balancing indicator in step 102, then source MME can not send Release Resource request.

Step 117, new side MME are that UE distributes a GUTI value and TA List, send TAU Accept to UE.

Step 118, UE send TAU Complete message to new side MME, and informing network side TAU finishes.

Consult Fig. 1, the embodiment of the invention two provides a kind of method that resource discharges of controlling, present embodiment and embodiment one difference are to tell this switching of source MME to be because the load balancing between MME causes by the Cause cause value in the handoff request that this method specifically comprises:

Step 201 is identical with step 101;

Step 202, eNodeB send handoff request Handover Required to source MME, Cause cause value indication Load balancing in this message, MME must not discharge the RAB carrying with the notice source, wherein, carry eNB S1-AP UE ID, Source ID and Target ID among the Handover required, wherein, Source ID and Target ID are this eNodeB ID.

Step 203, after source MME receives Handover Required, confirm that switch reasons value Cause is Load balancing, must not know and initiate S1 connection resource release flow process, guarantee that the RAB bearing resource is not released, according to resource situation in the Pool, select new side MME, according to eNB S1-AP UE ID, obtain the contextual information of UE, send Forward Relocation Request to new side MME, carry the contextual information of UE in this message, wherein, the contextual information of UE comprises: the P-GW address, P-GWTEID, source S-GW address, source S-GW TEID.

Step 204-step 209 is identical with step 104-step 109.

Step 210, source MME transmission forwarding handoff response are finished and are replied Forward RelocationComplete Ack to new side MME.Because source MME receives Cause cause value indication load balancing in step 102, so can not sending, source MME do not discharge upward this user's connection resource of resource request message request eNodeB deletion eNodeB, if knowing service SGW in the step 206 does not change, then can not send more new bearer request to SGW request deletion S1-U carrying, otherwise MME request SGW deletion SGW goes up user's bearing resource.

Step 211-step 215 is identical with step 111-step 115.

Step 216, new side MME are to the HSS registration related information; HSS sends CancelLocation message to source MME, the context of source MME deletion UE.

Because source MME receives that in step 202 the Cause cause value is load balancing, then source MME can not send Release Resource request.

Step 217-step 218 is identical with step 117-step 118.

As shown in Figure 2, the embodiment of the invention three provides a kind of method that resource discharges of controlling, in the method, eNodeB is when confirming that source MME need carry out load migration, in the load migration process, eNodeB is that UE distributes a new eNB S1-AP UE ID, and is the newly-built cover context of this UE, and this method specifically comprises:

Step 301 is identical with step 101.

Step 302, eNodeB send handoff request Handover required to source MME, carry eNB S1-APUE ID, Source ID and Target ID in this message, and wherein, Source ID and TargetID are this eNodeB ID.

Step 303, source MME are according to resource situation in the Pool, select new side MME, according to eNBS1-AP UE ID, obtain the contextual information of UE, send forwarding handoff request ForwardRelocation Request to new side MME, carry the contextual information of UE in this message, wherein, the contextual information of UE comprises: P-GW address, P-GW TEID, source S-GW address, source S-GW TEID.

Step 304, new side MME are that UE distributes a MME S1-AP UE ID, whether can insert source S-GW according to source S-GW Address Confirmation oneself, if can not, from network, select new side S-GW and set up corresponding bearer context information.New side MME sends handoff request HandoverRequest to eNodeB, carries in the Handover Request message: MME S1-AP UE ID that new side MME distributes and new side S-GW address and new side S-GW TEID.

Step 305, eNodeB distribute an eNB S1-AP UE ID to UE, send handoff response Handover Request Ack, carry the newly assigned eNBS1-AP UE of eNodeB ID among this Handover Request Ack.

Step 306, new side MME send and transmit handoff response Forward Relocation Response message to source MME, carry Serving GW change indication in this message, know by this indication whether user's service S-GW changes.

Step 307, new side MME send switching command Handover Command to eNodeB.

Step 308, eNodeB send switching indication Handover Notify for new side MME.

Step 309, new side MME send the forwarding handoff response and finish Forward Relocation Complete message to source MME.

Step 310, source MME transmission forwarding handoff response are finished and are replied Forward RelocationComplete Ack to new side MME.

Step 311, source MME can start timer, the contextual information of deletion UE, the contextual information of this UE comprises the resource information of eNodeB and the resource information of source S-GW, and send ReleaseResource deletion S1 connection, whether source MME can change the beared information whether decision notifies source S-GW deletion user according to the S-GW of knowing in the step 306.

If step 312-step 315 source S-GW is different with new side S-GW, then upgrade the bearer context that S-GW and PDN-GW go up UE.

Step 316, UE occurrence positions change, and send tracing section updating request TAU to new side MME.

Step 317, new side MME are to the HSS registration related information; HSS sends CancelLocation message to source MME, the context of source MME deletion UE.

If source MME does not discharge the S1 connection in step 318 step 311.Then source MME initiates Release Resource flow process, the S1 connection resource between release and the eNodeB to eNodeB.

Step 319, new side MME are that UE distributes a GUTI value and TA List, send TAU Accept to UE.

Step 320, UE send TAU Complete message to new side MME, and informing network side TAU finishes.

As shown in Figure 3, the embodiment of the invention four provides a kind of method that resource discharges of controlling, source MME notifies new side MME to initiate switching flow when needs are loaded migration in this method, eNodeB notified new side MME to finish switching after switching was finished, the relevant user's context of new side MME notice source MME deletion, source MME can delete the context of UE, does not discharge the S1 connection request message but can not send, and this method specifically comprises:

Step 401, source MME judge needs to initiate the load migration flow process, select a new MME, and send Forward Relocation Request message to new side MME, carry the cause value of user context information and load balancing indication or load balancing.

If the new side MME of step 402 judges that the S-GW of service-user changes, then send and set up bearer context request Create bearer request message to new side S-GW, carry bearer context information, comprise P-GW address and TEID; New side S-GW sends and sets up bearer context response Createbearer response message to new side MME, carries up S-GW address and TEID.

Step 403, new side MME are according to eNodeB address in the user's context, sending this handoff request of handoff request indication eNodeB to eNodeB is for due to the load balancing, carries MME S1-AP UE ID, eNB S1-AP UE ID and load balancing indication information (cause value of loadbalancing indication or expression load balancing) that new side MME distributes in the message.

Step 404, eNB send switching request response to new side MME, replace this user's that original source MME distributes among the eNB MME S1-AP UE ID with the MME S1-AP UE ID of the new side MME distribution of receiving in the step 403.

If step 405 adopts indirect forwarding mechanism, then need set up retransmitting paramater at new side S-GW, S-GW sent retransmitting paramater for new side MME after foundation was finished.

Step 406, new side MME send Forward Relocation Response to source MME, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.If S-GW changes, and system's employing forwarding indirectly, need simultaneously to bring source MME with retransmitting paramater.

Also need to carry load balancing indication in this message and inform that source MME can discharge MME and go up user's related resource, discharge resource request message to eNodeB but must not send out.

If step 407 adopts indirect forwarding mechanism, then source MME need send data forwarding addresses and the TEID of Create bearerrequest information updating source SGW.

Step 408, source MME send Handover Command message to eNodeB, carry data forwarding addresses and TEID in the message.

Step 409, eNodeB find that source eNodeB is identical with new side eNodeB, send Handover Notify message then for new side MME.

Step 410, new side MME send Forward Relocation Complete to source MME.

Step 411, source MME send Forward Relocation Complete Ack to new side MME, and startup timer, behind the timer expiry, deletion source MME and S-GW go up user's contextual information, but can not send out message discharges the user to eNodeB connection resource.

Step 412-step 415, new side MME renewal SGW and PGW go up user's bearer context information.

Step 416, user's TA district changes, and initiates the TAU flow process then.

Step 417, HSS send Cancel Location message to the log-on message of source MME cancellation user in HSS.

MME can not send Release Resource message in step 418, the present embodiment, and promptly this step does not exist.

Step 419, new side MME send TAU accept to UE, carry TA list and new GUTI value.

Step 420, user send TAU complete message to MME, and the TAU flow process is finished in expression.

Consult Fig. 4, the embodiment of the invention five provides a kind of method that resource discharges of controlling, source MME notifies new side MME to initiate switching flow when needs carry out load migration in this method, load balancing sign position is set on the source MME simultaneously, when source MME receives the ForwardRelocation Response message that new side MME sends, and after sending Forward Relocation ResponseAck message, new side MME starts timer, deletion source MME goes up the related resource of UE behind the timer expiry, do not discharge related resource but can not send release S1 connection request message to eNodeB, this method specifically comprises:

Step 501, source MME confirm to need to initiate the load migration flow process, a load balancing sign position is set, and select a new MME, such as new side MME, send forwarding handoff request Forward Relocation Request to new side MME, carry the contextual information of UE among this Forward Relocation Request.

If the new side MME of step 502 judges that the S-GW of service-user changes, then send and set up bearer context request Create bearer request message to new side S-GW, carry bearer context information, comprise P-GW address and TEID; New side S-GW sends and sets up bearer context response Createbearer response message to new side MME, carries up S-GW address and TEID.

Step 503, new side MME send handoff request according to eNodeB address in the user's context to eNodeB, carry MME S1-AP UE ID, eNB S1-AP UEID that new side MME distributes in the message.

Step 504, eNB send switching request response to new side MME, replace this user's that original source MME distributes among the eNB MME S1-AP UE ID with the MME S1-AP UE ID of the new side MME distribution of receiving in the step 502.

If step 505 adopts indirect forwarding mechanism, then need set up retransmitting paramater at new side S-GW, S-GW sent retransmitting paramater for new side MME after foundation was finished.

Step 506, new side MME send Forward Relocation Response to source MME, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.If source S-GW changes, and if system's employing forwarding indirectly, need simultaneously to bring source MME with retransmitting paramater.

If step 507 adopts indirect forwarding mechanism, then source MME need send data forwarding addresses and the TEID of Create bearerrequest information updating source S-GW.

Step 508, source MME send Handover Command message to eNodeB, carry data forwarding addresses and TEID in the message.

Step 509, eNodeB find that source eNodeB is identical with new side eNodeB, send Handover Notify message then for new side MME.

Step 510, new side MME send Forward Relocation Complete to source MME.

Step 511, source MME send Forward Relocation Complete Ack to new side MME, and startup timer, according to default load balancing sign position, behind timer expiry, deletion source MME goes up user's contextual information, does not discharge the S1 connection request message to eNodeB but can not send.Whether whether source MME can change decision according to S-GW discharges the bearing resource that source S-GW goes up the user.

Step 512-step 520 is identical with step 412-step 420.

As shown in Figure 5, the embodiment of the invention six provides a kind of method that resource discharges of controlling, in this method, source MME notifies new side MME to initiate switching flow when needs carry out load migration, carry load balancing indication information (is load balancing such as Load balancing indication or Cause cause value) at new side MME in the handoff request that eNodeB sends, indication eNodeB refuses when source MME transmission discharges resource request.

Step 601, source MME judge needs to initiate the load migration flow process, select a new MME, and send Forward Relocation Request message to new side MME, carry user context information and load balancing indication information, wherein, the load balancing indication information can be: Load balancing indication or Cause cause value are load balancing.

If the new side MME of step 602 judges that the S-GW of service-user changes, then send and set up bearer context request Create bearer request message to new side S-GW, carry bearer context information, comprise P-GW address and TEID; New side S-GW sends and sets up bearer context response Createbearer response message to new side MME, carries up S-GW address and TEID.

Step 603, new side MME are according to eNodeB address in the user's context, sending this handoff request of handoff request indication eNodeB to eNodeB is for due to the load balancing, carries MME S1-AP UE ID, eNB S1-AP UE ID and load balancing indication information (cause value of loadbalancing indication or load balancing) that new side MME distributes in the message.

Step 604-step 610 is identical with step 404-step 410.

Step 611, source MME send Forward Relocation Complete Ack to new side MME.

Step 612, source MME send to eNodeB and discharge resource request.

Step 613, since in step 603 eNodeB known the load balancing indication information, so do not delete the contextual information that eNodeB goes up UE, and to source MME transmission release resource refuse information, comprise in this message: Load balancing cause value or Load balancing indication information are represented resource contention.

Step 614-step 619 is identical with step 412-step 417.

Wherein, above-mentioned steps 612-step 613 also can be carried out in step 619 back, does not influence realization of the present invention.

Step 620-step 621 is identical with step 419-step 420.

As shown in Figure 6, the embodiment of the invention seven provides a kind of method that resource discharges of controlling, in this method, when eNodeB confirms to carry out switching flow and finishes load migration between MME, refuse for the resource release request that the source MME that carries out load migration is sent, this method specifically comprises:

The load state of each MME that step 701, eNodeB basis are connected with self, the source MME that affirmation need be loaded and be moved is provided with a load balancing sign position, and expression active user's switching flow is caused by load migration.

Load balancing sign position in this step can be the load balancing sign position of corresponding source MME, also can be the load balancing sign position of corresponding UE, or the load balancing of corresponding source MME and UE sign position, does not influence realization of the present invention.

Step 702, eNodeB send handoff request Handover Required to source MME, wherein, carry eNB S1-AP UE ID and MME S1-AP UE ID among the Handover required.

After step 703, source MME receive Handover Required, according to resource situation in the Pool, select new side MME, according to eNB S1-AP UE ID, obtain the contextual information of UE, send Forward Relocation Request, carry the contextual information of UE in this message to new side MME, wherein, the contextual information of UE comprises: P-GW address, P-GW TEID, source S-GW address, source S-GW TEID.

Step 704, new side MME are that UE distributes a MME S1-AP UE ID, whether can insert source S-GW according to source S-GW Address Confirmation oneself, if can not, from network, select new side S-GW and set up bearer context, send handoff request Handover Request to eNodeB, carrying new side S-GW address, new side S-GW TEID and new side MME in the HandoverRequest message is the newly assigned MME S1-AP of UE UE ID.

Step 705, eNodeB send handoff response Handover Request Ack to new side MME, carry eNB S1-AP UE ID among this Handover Request Ack.

Step 706-step 709 is identical with step 106-step 109.

Step 710, source MME transmission forwarding handoff response are finished and are replied Forward RelocationComplete Ack to new side MME.

Step 711, source MME start timer, during timer expiry, and the related resource of deletion UE, and send release resource request Release Resource to eNodeB.

Step 712, eNodeB are according to the load balancing sign position that is provided with in the step 701, know that not needing to discharge S1 connects, discharge refusal Release ResourceReject so eNodeB sends resource to source MME, the cause value among this Release Resource Reject is represented resource contention.

Step 713-step 716 is identical with step 607-step 610.

As shown in Figure 7, the embodiment of the invention eight provides a kind of method that resource discharges of controlling, in this method, load migration is finished by UE initiation TAU flow process between MME, UE informs that this flow process of new side MME is owing to load migration causes in the TAU request, new side MME notifies the follow-up flow process of source MME must not initiate S1 connection release resource request in context request, and this method specifically comprises:

Step 801, source MME reach certain threshold value or need to be serviced or other strategies cause when needing the migration load in self load, initiate load migration order Re-distribution Command to the eNodeB that is associated.If eNB can perception need carry out the MME of load migration, then this message can be omitted.

Step 802, eNodeB initiate load migration indication Re-distribution Indication to UE, and notice UE initiates the TAU flow process and finishes load migration.

Step 803, be in the Active state as UE, sending TAU asks to eNodeB, carry Old GUTI and load balancing indication information in the TAU request, wherein the load balancing indication information is: Loadbalancing indicator or entrained Cause value are Load balancing.

Step 804, eNodeB are serving MME of the new selection of user, such as new side MME, and transmit TAU and ask to new side MME, carry eNB S1-AP UE ID in this TAU request, and this ID is identical with the eNB S1-AP UE ID that is retained in source MME.

Step 805, new side MME send Context Request message request user's context according to Old GUTI value to source MME, carry Load balancing indicator or cause value Loadbalancing in the message.Source MME starts timer, and this MME of deletion goes up this user's related resource behind the timer expiry, does not go up this user's resource but can not send out release resource request message request eNodeB deletion eNodeB.

Step 806, source MME send context response information to new side MME, comprise in this context response information: bearer context, MM context, S-GW signaling address and TEID (TunnelEndpoint Identifier, Tunnel End Point Identifier).

Step 807, new side MME carry out verification process.

Step 808, new side MME send context acknowledge message to source MME, source MME is according to this information, invalid with being changed to about the relevant information of SGW and HSS in the user's context, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.

Step 809, new side MME upgrade user context information among the S-GW, comprise the MME address of this user's association.

Step 810, new side MME upgrade the MME information of the user among the HSS, and cancellation source MME information.Because source MME has received that Load balancing indicates (perhaps cause value Load balancing) know and discharges the S1 connection resource in the step 805, if source MME is not activated timer in the step 805, then source MME can delete this MME and go up user context information, but can not send and discharge resource request to eNodeB, if know in the step 808 that S-GW changes, then source MME need delete the bearing resource information of user at source S-GW, otherwise does not need.

Step 811, new side MME send tracking area and accept message to UE, carry newly assigned GUTI and TAI list and EPS loaded state, and this message is informed eNodeB with the signaling plane information (as MME S1-APUE ID) of new side MME.

Step 812, UE respond TAU Complete message and give new side MME.

As shown in Figure 8, the embodiment of the invention nine provides a kind of method that resource discharges of controlling, and in this method, the user of connected state informs that in RRC message eNodeB refuses when receiving the release resource request of source MME transmission, and this method specifically comprises:

Step 901, source MME reach certain threshold value or need to be serviced or other strategies cause when needing the migration load in load, initiate load migration order Re-distributionCommand to the eNodeB that is associated.If eNodeB can perception need carry out the MME of load migration, then this message can be omitted.

Step 902, eNodeB initiate load migration indication Re-distribution Indication to UE, and notice UE initiates the TAU flow process and finishes load migration.

Step 903, be in the Active state as UE, sending TAU asks to eNodeB, carry Old GUTI and load balancing indication information in the TAU request, wherein the load balancing indication information is: Loadbalancing indicator or entrained Cause value are Load balancing.

After eNodeB is known this information, can refuse for the release resource request that source MME sends.

To be that the user is new select a serving MME for step 904, eNodeB, such as new side MME, and transmits TAU and ask to new side MME, carries eNB S1-AP UE ID in this TAU request, this ID with UE at the eNB of source MME S1-AP UE ID.

Step 905, new side MME send Context Request message request user's context according to Old GUTI value to source MME.Source MME can start timer, send ReleaseResource message informing eNodeB behind the timer expiry and delete the corresponding resource of this UE, but eNodeB is known this flow process in step 903 be load migration flow process, so can not accept the release resource request that source MME sends, satisfy to send discharge the resource refuse information to source MME, carry Load balancing cause value in the message or Load balancing indication information is represented resource contention.

Step 906, source MME send context response information to new side MME, comprise in this context response information: bearer context, MM context, S-GW signaling address and TEID (TunnelEndpoint Identifier, Tunnel End Point Identifier).

Step 907, new side MME carry out verification process.

Step 908, new side MME send context acknowledge message to source MME, source MME is according to this information, invalid with being changed to about the relevant information of SGW and HSS in the user's context, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.

Step 909, new side MME upgrade user context information among the S-GW, comprise the MME address of this user's association.

Step 910, new side MME upgrade the MME information of the user among the HSS, and cancellation source MME information.

If step 911 source MME is not activated timer in step 905, then source MME sends and discharges resource request to eNodeB, carries MME S1-AP UE ID and eNB S1-AP UE ID.Source MME can know whether service S-GW changes decision and whether send the bearing resource information that message request source S-GW deletes user on it according to step 908, if S-GW does not change, then do not need to send the bearing resource information that message informing S-GW deletes user on it, delete this user's relevant bearer resource otherwise then need to send message informing S-GW.

Step 912, eNodeB know that in step 903 this flow process is a load migration flow process, so can not accept the release resource request that source MME sends, satisfy to send discharge the resource refuse information to source MME, carry Load balancing cause value in the message or Load balancing indication information is represented resource contention.

Step 913, new side MME send signaling plane information to eNodeB, and this signaling plane information comprises the MME S1-APUE ID that new side MME distributes.

Wherein, step 913 does not have sequential relationship successively as long as send in step 904 back with other steps.

Step 914, new side MME send tracking area and accept message to UE, carry newly assigned GUTI and TAI list and EPS loaded state.

Step 915, UE respond TAU Complete message and give new side MME.

As shown in Figure 9, the embodiment of the invention ten provides a kind of method that resource discharges of controlling, and in this method, the UE that is in connected state informs that in RRC message eNodeB is own new eNB S1-APUE ID of distribution, when avoiding source MME resource to discharge, discharge the RAB carrying and cause service disconnection.

Step 1001-step 1003 is identical with step 901-step 903.

Step 1004, eNodeB are serving MME of the new selection of user, for example new side MME, and transmit TAU and ask to new side MME, and to new eNB S1-AP UE ID (eNB S1-AP UE ID who is different from last time of UE distribution, newly assigned eNB S1-AP UE ID is used to discern the sign that eNodeB is connected with new side MME interface), and set up a new context at eNodeB for UE, this context comprises the newly assigned eNB S1-AP of eNodeB UE ID.

Step 1005, new side MME send ContextRequest message request user's context according to Old GUTI value to source MME.Source MME can start timer, send Release Resource message informing eNodeB behind the timer expiry and delete the corresponding resource of this UE, but eNodeB is known as this user in step 1004 has newly distributed an eNB S1-AP UE ID, discharge message related to resources so MME sends, eNB can delete the related resource of source MME.

Step 1006, source MME send context response information to new side MME, comprise in this context response information: bearer context, MM context, S-GW signaling address and TEID (TunnelEndpoint Identifier, Tunnel End Point Identifier).

Step 1007, new side MME carry out verification process.

Step 1008, new side MME send context acknowledge message to source MME, source MME is according to this information, invalid with being changed to about the relevant information of S-GW and HSS in the user's context, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.

Step 1009, new side MME upgrade user context information among the S-GW, comprise the MME address of this user's association.

Step 1010, new side MME upgrade the MME information of the user among the HSS, and cancellation source MME information.

If being not activated timer then can sending in step 1005, step 1011, source MME discharge resource request to eNodeB, carry eNB S1-AP UE ID in this request and (be different from ID number in the step 4, this ID is the ID that is used to discern interface between eNodeB and the source MME that eNodeB distributes), eNodeB can discharge related resource.Source MME can know whether service S-GW changes decision and whether send the bearing resource information that message request source S-GW deletes user on it according to step 1008, if S-GW does not change, then do not need to send the bearing resource information that message informing S-GW deletes user on it, delete this user's relevant bearer resource otherwise then need to send message informing S-GW.

Sequential relationship before and after this step and following step do not exist.

Step 1012, new side MME send tracking area and accept message to UE, carry newly assigned GUTI and TAI list and EPS loaded state, and this message is informed eNodeB with the signaling plane information (as MME S1-APUE ID) of new side MME.

Step 1013, UE respond TAU Complete message and give new MME.

As shown in figure 10, the embodiment of the invention 11 provides a kind of method that resource discharges of controlling, in this method, eNodeB indication UE initiation TAU flow process is finished the load migration between MME, because eNodeB knows the source MME that need carry out load migration, so notify new side MME to tell source MME must not initiate to discharge resource request, this method specifically comprises:

Step 1101, eNodeB confirm the to load source MME of migration sends broadcast to UE, carries the sign (sign that comprises source MME) that needs the MME that load heavily distributes in this message.

Whether step 1102, UE relatively need source MME that load heavily distributes identical with self serving MME, if identical then send TAU and ask to eNodeB, carry out load migration between MME with request.

Step 1103, eNodeB are that UE selects a new MME, such as new side MME, transmit the TAU request to new side MME, carry eNB S1-APUE ID and load balancing indication information (can be that Load balancing indication or Casue cause value are Load balancing) in this TAU request.

Step 1104, new side MME send ContextRequest message request user's context according to Old GUTI value to source MME, carry Load balancingindicator or cause value Load balancing in the Context Request message.Source MME starts timer, and this MME of deletion goes up this user's related resource behind the timer expiry, does not go up this user's resource but can not send out release resource request message request eNodeB deletion eNodeB.

Step 1105, source MME send context response information to new side MME, comprise in this context response information: bearer context, MM context, S-GW signaling address and TEID (TunnelEndpoint Identifier, Tunnel End Point Identifier).

Step 1106, new side MME carry out verification process.

Step 1107, new side MME send context acknowledge message to source MME, source MME is invalid with being changed to about the relevant information of SGW and HSS in the context according to this information, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.

Step 1108, new side MME upgrade user context information among the S-GW, comprise the MME address of this user's association.

Step 1109, new side MME upgrades the MME information of the user among the HSS and cancels source MME information, because source MME has received the load migration indication in the step 1104, know terrific release S1 connection resource, so source MME can not initiate to discharge resource request to eNodeB, source MME can know whether service S-GW changes decision and whether send the bearing resource information that message request source S-GW deletes user on it according to step 1107, if S-GW does not change, then do not need to send the bearing resource information that message informing S-GW deletes user on it, delete this user's relevant bearer resource otherwise then need to send message informing S-GW.

Step 1110, new side MME send tracking area and accept message to UE, carry newly assigned GUTI and TAI list and EPS loaded state, and this message is informed eNodeB with the signaling plane information (as MME S1-APUE ID) of new side MME.

Step 1111, UE send tracing section updating and finish message to new side MME.

As shown in figure 11, the embodiment of the invention 12 provides a kind of method that resource discharges of controlling, in this method, when eNodeB confirms that certain MME need carry out load migration, just be provided with (or the load balancing of corresponding UE sign position, load balancing sign position that should MME, or the sign position of corresponding source MME and UE), it is follow-up when this MME sends the release resource request to eNodeB, eNodeB can not discharge the S1 connection resource, send the release resource and refuse to this MME (such as being source MME), this method specifically comprises:

The load state of each MME that step 1201, eNodeB basis are connected with self, the source MME that affirmation need be loaded and be moved, send broadcast to UE, carry the sign (sign that comprises source MME) that needs the MME that load heavily distributes in this message, and the load balancing sign position of the MME that corresponding load heavily distributes is set, this sign bit representation does not discharge user context information on the eNodeB relevant with this MME.

ENodeB also can be provided with the load balancing sign position of corresponding UE in this step, and expression does not discharge the contextual information of this UE, or the sign position of corresponding source MME and UE, does not influence realization of the present invention.

Whether step 1202, the UE migration MME that relatively loads is identical with self serving MME, if identical then send TAU and ask to carry out load migration between MME to eNodeB.

Whether step 1203, UE relatively need source MME that load heavily distributes identical with self serving MME, if it is identical then send TAU and ask to eNodeB, carry out load migration between MME with request, carry eNB S1-AP UE ID in this message, identical with the eNB S1-AP UE that preserves among source MME ID number.

Step 1204, new side MME send ContextRequest message request user's context according to Old GUTI value to source MME.Source MME can start timer, can send Release Resource message informing eNodeB behind the timer expiry and delete the corresponding resource of this UE, but eNodeB is not because thereby step 1201 can be deleted this user's related resource, sends the release resource and refuses to this MME.

Step 1205, source MME send context response information to new side MME, comprise in this context response information: bearer context, MM context, S-GW signaling address and TEID (TunnelEndpoint Identifier, Tunnel End Point Identifier).

Step 1206, new side MME carry out verification process.

Step 1207, new side MME send context acknowledge message to source MME, source MME is invalid with being changed to about the relevant information of SGW and HSS in the context according to this information, carry Serving GW change indication in this message, know by this indication whether user's service S-GW changes.

Step 1208, new side MME upgrade user context information among the S-GW, comprise the MME address of this user's association.

Step 1209, new side MME upgrade the MME information of the user among the HSS and cancel source MME information, if MME does not discharge the S1 connection resource in the step 1204, then source MME start flow is deleted the S1 connection resource.

Step 1210, eNodeB is according to load balancing sign position, judgement must not discharge the resource that eNodeB goes up this UE, send refusal and discharge message related to resources to source MME, source MME receives the user's context information on it of deletion after this message, source MME can know whether service S-GW changes decision and whether send the bearing resource information that message request source S-GW deletes user on it according to step 1207, if S-GW does not change, then do not need to send the bearing resource information that message informing S-GW deletes user on it, delete this user's relevant bearer resource otherwise then need to send message informing S-GW.

Wherein, step 1209-step 1210 does not have any front and back sequential relationship with step 1208,1211,1212,1213.

Step 1211, new side MME upgrade the MME information of the user among the HSS and cancel source MME information.

Step 1212, new side MME send tracking area and accept message to UE, carry newly assigned GUTI and TAI list and EPS loaded state, and this message is informed eNodeB with the signaling plane information (as the MME S1-AP UE ID of new side MME distribution) of new side MME.

Step 1213, UE send tracing section updating and finish message to new side MME.

As shown in figure 12, the embodiment of the invention 13 provides a kind of method that resource discharges of controlling, in this method, source MME notice eNodeB need carry out load migration, eNodeB is provided with (the perhaps load balancing of corresponding UE sign position, load balancing sign position that should source MME, or the load balancing of corresponding source MME and UE sign position), follow-up release resource request message of initiating for source MME is refused, and this method specifically comprises:

Step 1301, source MME reach certain threshold value or need to be serviced or other strategies cause when needing migration source MME load in load, initiate load migration order Re-distribution Command to the eNodeB that is associated.

Step 1302, eNodeB notice UE initiate the TAU flow process and finish load migration, and put the load balancing sign position of a corresponding source MME on eNodeB, show that the release resource request of follow-up this source MME transmission should be refused.

The UE of step 1303, Active state sends TAU and asks to eNodeB.

Step 1304, eNodeB are serving MME of the new selection of UE, such as new side MME, and transmit TAU and ask to new side MME, carry eNB S1-AP UE ID in this TAU request, the eNB S1-AP UE ID that this ID distributed for the user with eNodeB last time is promptly identical at the eNBS1-AP of source MME UE ID with UE.

Step 1305, new side MME send ContextRequest message request user's context according to Old GUTI value to source MME.Source MME can start timer, can send Release Resource message informing eNodeB behind the timer expiry and delete the corresponding resource of this UE, but eNodeB is not because thereby step 1302 can be deleted this user's related resource, sends the release resource and refuses to this MME.

Step 1306, source MME send context response information to new side MME, comprise in this message: bearer context, MM context, S-GW signaling address and TEID (Tunnel EndpointIdentifier, Tunnel End Point Identifier).

Step 1307, new side MME carry out verification process.

Step 1308, new side MME send context acknowledge message to source MME, source MME is invalid with being changed to about the relevant information of SGW and HSS in the context according to this information, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.

Step 1309, new side MME upgrade user context information among the S-GW, comprise the MME address of this user's association.

Step 1310, new side MME upgrade the MME information of the user among the HSS, and cancellation source MME information.

Step 1311, source MME send and discharge resource request to eNodeB, discharge in the resource request and carry MME S1-AP UE ID and eNB S1-AP UE ID.

If step 1312 source MME is not activated timer deletion respective resources in step 1305, then eNodeB is according to the load balancing sign position of the corresponding source MME that is provided with in the step 1302, know that this flow process is to be used for load migration flow process, so can not accept the resource release request that source MME sends, then send resource and discharge refuse information, carry Load balancing cause value in the message or Load balancing indication information is represented resource contention to source MME.Source MME can know whether service S-GW changes decision and whether send upward user's bearing resource information of message request SGW deletion SGW according to step 1308, if SGW does not change, then do not need to send message informing SGW deletion SGW and go up user's bearing resource information, delete this user's relevant bearer resource otherwise then need to send message informing SGW.

Wherein, step 1311-1312 and step 1313-1314 do not have temporal order.

Step 1313, new side MME send signaling plane information to eNodeB, and this signaling plane information comprises: MME S1-AP UE ID.

Wherein, step 1313 sends in step 1304 back and gets final product, and does not have sequential relationship successively with other steps.

Step 1314, new side MME send tracking area and accept message to UE, carry newly assigned GUTI and TAI list and EPS loaded state.

Step 1315, UE respond TAU Complete message and give new MME.

As shown in figure 13, the embodiment of the invention 14 provides a kind of method that resource discharges of controlling, in this method, the source MME that need carry out load migration is when notice UE initiates the load migration flow process, load balancing sign position is set, represent that this MME does not initiate to discharge resource request and gives eNodeB, this method specifically comprises:

Step 1401, source MME reach certain threshold value or need to be serviced or other strategies cause when needing migration source MME load in load, initiate load migration order Re-distribution Command to the eNodeB that is associated.If eNB can perception need carry out the MME of load migration, then this message can be omitted.Can put a load migration sign on the source MME this moment, shows to send to discharge resource request message to eNB.

Step 1402, eNB informing user terminal are initiated the TAU flow process and are finished load migration.

The user of step 1403, Active state sends TAU and asks to eNB, wherein carries Old GUTI value in the TAU request.

Step 1404 is identical with step 1304.

Step 1405, new side MME send ContextRequest message request user's context according to Old GUTI value to source MME., source MME can start timer, behind the timer expiry, can not send Release Resource message informing eNodeB and delete the corresponding resource of this UE.

Step 1406, source MME send context response information to new side MME, comprise in this message: bearer context, MM context, S-GW signaling address and TEID (Tunnel EndpointIdentifier, Tunnel End Point Identifier).

Step 1407 is identical with step 1307.

Step 1408, new side MME send context acknowledge message to source MME, source MME is invalid with being changed to about the relevant information of SGW and HSS in the context according to this information, carry Serving GW change indication in this message, know by this indication whether user's service SGW changes.

Step 1409, new side MME upgrade user context information among the S-GW, comprise the MME address of this user's association.

Step 1410, new side MME upgrade the MME information of the user among the HSS and cancel source MME information.

Step 1411, new side MME send tracking area and accept message to UE, carry newly assigned GUTI and TAI list and EPS loaded state, and this message can be informed eNB with the signaling plane information (as MME S1-AP UE ID) of eNB and new side MME by piggback.

Step 1412, UE respond TAU Complete message and give new MME.

Contextual information for source MME control base station refusal deletion UE can have both modes: a kind ofly be: source MME does not start timer, discharges resource request to control self not send to the base station; When the base station does not receive the release resource request of source MME transmission, keep the contextual information of described UE; Another kind is: source MME starts timer, and when timer expiry, the contextual information of the UE on the deletion source MME is controlled self and do not sent the release resource request to the base station.Described a kind of implementation wherein among the foregoing description one, two, four, five, eight, 11,14 each embodiment,, used another mode can realize purpose of the present invention too for the various embodiments described above.

One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, read-only memory for example, disk or CD etc.

Consult Figure 14, the embodiment of the invention 15 provides a kind of network element device, comprising:

Confirmation unit 1501 is used for during to new side MME migration, confirming because the load balancing of described source MME causes described UE migration from source Mobility Management Entity MME when user equipment (UE);

Control unit 1502 is used for confirming because after the load balancing of described source MME causes described UE migration the contextual information of the described UE of control base station refusal deletion.

Wherein, described network element device is source MME, and described confirmation unit 1501 is used for confirming because the load balancing of described source MME causes described UE migration according to from the base station or from the received load balancing indication information of new side MME.

Wherein, described network element device is source MME, described confirmation unit 1501, and set load balancing identifies the position when being used for according to source MME initiation load migration flow process, confirms because the load balancing of described source MME causes described UE to move.

Wherein, described network element device is the base station, and described confirmation unit 1501 is used for the load balancing sign position according to corresponding source MME that sets in advance and/or UE, confirms because the load balancing of described source MME causes described UE migration.

Wherein, described network element device is the base station, described confirmation unit 1501, be used for load balancing indication information that obtains according to the load balancing indication information that obtains from UE or from new side MME or the load balancing indication information that obtains from source MME, confirm because the load balancing of MME causes the UE migration.

Consult Figure 15, the embodiment of the invention 16 provides a kind of network element device, can be the base station, comprising:

Confirmation unit 1601 is used to confirm because the load balancing of source MME makes UE need move to new side MME;

New logo transmitting element 1602 is used to described UE to distribute one to be used to discern the sign that described new side MME is connected with inter-base station interface and to send to described new side MME;

New side MME sign receiving element 1603 is used to receive the sign that is used to discern described interface connection that described new side MME distributes;

Unit 1604 set up in the UE context, is used to the newly-built context of described UE, and described newly-built context comprises: the sign that is used to discern described interface connection of described base station assigns, and with the sign that recognition interface is connected that is used for of described new side MME distribution.

Wherein, described confirmation unit 1601 is used for the load state according to each MME that is connected with described equipment, confirms because the load balancing of source MME makes UE need move to new side MME.

Wherein, described confirmation unit 1601, be used for the load migration request of carrying the load balancing indication information that sends according to UE, confirm to make the UE migration, and determine that according to network condition described UE need move to described new side MME owing to serve the load balancing of the source MME of described UE.

The embodiment of the invention 17 provides a kind of network system, comprising: source MME, base station, wherein,

As seen from the above analysis, the embodiment of the invention has following beneficial effect:

Source MME is after affirmation causes the UE migration owing to the load balancing between MME in the embodiment of the invention, and the control base station stops deleting the contextual information of UE, is not released with assurance RAB carrying.

The base station is being confirmed because after the load migration of MME caused the UE migration, the contextual information of this UE of refusal deletion was not released to guarantee the RAB carrying in the embodiment of the invention.

The base station is known because of after the load balancing between MME causes UE migration in the embodiment of the invention, for described UE redistributes an eNB S1-AP UE ID and sends to new side MME, and be the newly-built context of this UE, comprise in the context of newly-built UE: base station newly assigned eNB S1 AP ID, when receiving the release resource request of source MME transmission, because that carry in the release resource request is the eNB S1-AP UE ID that the base station is formerly distributed, so the context of newly-built UE can not deleted in the base station, be not released to guarantee the RAB carrying.

More than method, network element device and network system that control resource that the embodiment of the invention provided is discharged be described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, in sum, this description should not be construed as limitation of the present invention.

Claims

1, a kind of method of controlling resource release is characterized in that, comprising:

2, method according to claim 1 is characterized in that,

Described affirmation is because the load balancing of described source MME causes described UE migration to be specially:

Described source MME confirms because the load balancing of described source MME causes described UE migration according to the load balancing indication information received from the base station.

3, method according to claim 2 is characterized in that,

Described source MME is specially from base station balancing received load indication information:

Described source MME receives the load migration request message that carries described load balancing indication information from the base station.

4, method according to claim 1 is characterized in that,

Described source MME confirms because the load balancing of described source MME causes described UE migration according to from the load balancing indication information that new side MME obtained.

5, method according to claim 4 is characterized in that, before described source MME obtained the load balancing indication information from new side MME, this method also comprised:

After UE receives the load migration order that network side sends, initiate to carry the load migration request message of load balancing indication information to the base station, the base station sends described load migration request of carrying the load balancing indication information to described new side MME;

Perhaps,

After described base station confirms that described source MME need carry out load migration, send the sign that to carry out the source MME that load heavily distributes to described UE, described UE is according to the sign of described source MME, confirm that described source MME is the MME that serves for oneself, send the load migration request to the base station, the load migration request that described load balancing indication information is carried to new side MME initiation in described base station.

6, method according to claim 1 is characterized in that,

Described source MME set load balancing sign position when initiating the load migration flow process is confirmed because the load balancing of described source MME causes described UE migration.

7, according to each described method of claim 1-6, it is characterized in that,

The contextual information of the described UE of described control base station refusal deletion is specially:

Described source MME control self does not send to described base station and discharges resource request.

8, according to each described method of claim 1-6, it is characterized in that,

Described source MME starts timer, and when described timer expiry, the contextual information of the described UE on the deletion source MME is controlled self and do not sent the release resource request to described base station.

9, method according to claim 1 is characterized in that,

Described base station is confirmed because the load balancing of described source MME causes the UE migration according to the load balancing sign position of corresponding source MME that sets in advance and UE.

10, method according to claim 9 is characterized in that, because the load balancing of described source MME causes before the UE migration, this method also comprises in affirmation:

Described base station is confirmed to carry out the source MME of load migration and the load UE that need be moved, and the load balancing sign position of described corresponding source MME and UE is set.

11, method according to claim 1 is characterized in that,

Described base station is confirmed to cause the UE migration owing to serve the load migration of the described source MME of described UE according to the load balancing sign position of the corresponding UE that sets in advance.

12, method according to claim 11 is characterized in that, before affirmation caused the UE migration owing to the load migration of serving the described source MME of described UE, this method also comprised:

The UE that need move is confirmed in described base station, and the load balancing sign position of the described UE of described correspondence is set.

13, method according to claim 1 is characterized in that,

Described base station is confirmed to cause the UE migration owing to serve the load migration of the described source MME of described UE according to the load balancing sign position of the corresponding MME that sets in advance.

14, method according to claim 13 is characterized in that, before affirmation caused the UE migration owing to the load migration of serving the described source MME of described UE, this method also comprised:

Described base station is confirmed to carry out the MME of load migration, and the load balancing sign position of the described MME of described correspondence is set.

15, method according to claim 1 is characterized in that,

After UE received the load migration indication of network side transmission, to base station transmission load balancing indication information, described base station was confirmed to cause described UE migration owing to serve the load balancing of the source MME of described UE according to described load balancing indication information.

16, method according to claim 1 is characterized in that,

Described base station is confirmed because the load balancing of source MME causes the UE migration according to the load balancing indication information that obtains from new side MME.

17, method according to claim 16 is characterized in that,

Described base station obtains the load balancing indication information from new side MME and is specially:

Described base station receives the handoff request message of carrying described load balancing indication information that described new side MME sends.

18, method according to claim 1 is characterized in that,

Described base station is confirmed because the load balancing of source MME causes the UE migration according to the load balancing indication information that obtains from source MME.

19, according to each described method of claim 9-18, it is characterized in that,

Described affirmation is because the load balancing of described source MME when causing described UE migration, and the contextual information of the described UE of control base station refusal deletion is specially:

The base station is receiving the release resource request that described source MME sends, and confirms because after the load balancing of source MME causes the UE migration, sends to described source MME to discharge the resource refuse information.

20, method according to claim 1, it is characterized in that, UE from source MME to new side MME transition process, this method also comprises: described base station obtains the signaling plane information of described new side MME, and described signaling plane information comprises: described new side MME distributed is used to discern the sign that new side MME is connected with inter-base station interface.

21, method according to claim 20 is characterized in that,

The signaling plane information that described base station obtains described new side MME is specially:

Described new side MME sends the tracking area that carries described signaling plane information to described base station and accepts message, and described signaling plane information is accepted to extract the message from described tracking area in described base station;

Perhaps,

Described new side MME sends to described base station and carries described signaling plane notification of information message.

22, according to claim 2,3,4,5,15,16,17,18 each described methods, it is characterized in that,

The load balancing indication information is the cause value of load balancing indication Load Balancing Indicator or expression load balancing.

23, a kind of method of controlling resource release is characterized in that, comprising:

24, method according to claim 23 is characterized in that,

Described base station is known because the load balancing of source MME makes UE need move to new side MME and is specially:

Described base station is confirmed because the load balancing of source MME makes UE need move to new side MME according to the load state of each MME that is connected with self.

25, method according to claim 23 is characterized in that,

Described base station is known because of the load balancing between MME causes UE migration and is specially:

UE is after the load migration indication that receives the network side transmission, the load migration request of load balancing indication information is carried in transmission, the base station is according to described load balancing indication information, confirm to make the UE migration, and determine that according to network condition described UE need move to described new side MME owing to serve the load balancing of the source MME of described UE.

26, method according to claim 23 is characterized in that,

The described new side MME of described reception discerns described UE being used to of distributing the sign that described interface connects to be specially:

Described new side MME sends the tracking area that carries described signaling plane information to described base station and accepts message, described base station is accepted to extract described signaling plane information the message from described tracking area, and described signaling plane information comprises described: new side MME is the sign that is used to discern described interface connection that described UE distributes;

Perhaps,

Described new side MME sends to described base station and carries signaling plane notification of information message, and described signaling plane information comprises described: new side MME is the sign that is used to discern described interface connection that described UE distributes.

27, method according to claim 25 is characterized in that,

28, a kind of network element device is characterized in that, comprising:

29, equipment according to claim 28 is characterized in that, described network element device is source MME,

Described confirmation unit is used for confirming because the load balancing of described source MME causes described UE migration according to from the base station or from the received load balancing indication information of new side MME.

30, equipment according to claim 28 is characterized in that, described network element device is source MME,

Described confirmation unit, set load balancing identifies the position when being used for according to source MME initiation load migration flow process, confirms because the load balancing of described source MME causes described UE to move.

31, equipment according to claim 28 is characterized in that, described network element device is the base station,

Described confirmation unit is used for the load balancing sign position according to corresponding source MME that sets in advance and/or UE, confirms because the load balancing of described source MME causes described UE migration.

32, equipment according to claim 28 is characterized in that, described network element device is the base station,

Described confirmation unit is used for load balancing indication information that obtains according to the load balancing indication information that obtains from UE or from new side MME or the load balancing indication information that obtains from source MME, confirms because the load balancing of MME causes the UE migration.

33, according to claim 31,32 described equipment, it is characterized in that described equipment also comprises:

The signaling plane information acquisition unit is used to obtain the signaling plane information of described new side MME, and described signaling plane information comprises: described new side MME be described UE distribute be used to discern the sign that new side MME is connected with inter-base station interface.

34, according to claim 29,30 described equipment, it is characterized in that,

Described control unit comprises the timer start unit,

Described timer start unit is used to start timer, when timer expiry, and the contextual information of deletion UE.

35, a kind of network element device is characterized in that, comprising:

36, equipment according to claim 35 is characterized in that,

Described confirmation unit is used for the load state according to each MME that is connected with described equipment, confirms because the load balancing of source MME makes UE need move to new side MME.

37, equipment according to claim 35 is characterized in that,

Described confirmation unit is used for the load migration request of carrying the load balancing indication information that sends according to UE, confirms to make the UE migration owing to serve the load balancing of the source MME of described UE, and determines that according to network condition described UE need move to described new side MME.

38, equipment according to claim 35 is characterized in that,

Described new side MME sign receiving element is the signaling plane information acquisition unit,

Described signaling plane information acquisition unit is used to obtain the signaling plane information of described new side MME, and described signaling plane information comprises: described new side MME is that UE distributed is used to discern the sign that new side MME is connected with inter-base station interface.

39, a kind of network system is characterized in that, comprising: source MME, base station, wherein,