CN102421203B

CN102421203B - Bearer deletion control method, home subscriber server and related equipment

Info

Publication number: CN102421203B
Application number: CN201110361115.XA
Authority: CN
Inventors: 郭小龙; 刘岚; 李明; 张万强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-07-25
Filing date: 2007-07-25
Publication date: 2014-07-16
Anticipated expiration: 2027-07-25
Also published as: CN102421203A

Abstract

The invention discloses a bearer deletion control method, a home subscriber server and related equipment, which are used for improving the universality of the bearer deletion control process. The method disclosed by the invention comprises the following steps that an intermediate network element receives a deletion type indicating parameter sent by the home subscriber server; and if a deletion type is indicated into an attachment type by the deletion type indicating parameter and related bearers exist, the bearers between the intermediate network element and a service gateway as well as between the service gateway and a packet data network gateway are deleted. Moreover, the invention also provides the home subscriber server and the related equipment. Due to the adoption of the bearer deletion control method, the home subscriber server and the related equipment, the universality of the bearer deletion control process can be effectively improved.

Description

Control method for deleting load-bearing and home subscriber server and relevant device

Technical field

The present invention relates to communication field, relate in particular to a kind of control method for deleting load-bearing and home subscriber server and relevant device.

Background technology

Along with the development of network technology, various novel network configurations are engendered, for example System Architecture Evolution network (SAE, System Architecture Evolved), the region that may for example, exist stack to cover with existing network (2G/3G network) in the universal process of SAE, as shown in Figure 1, RA1 and RA2 are the Routing Area of existing 2G/3G, subscriber equipment (the UE of existing 2G/3G, User Equipment) RA of every replacing needs to initiate routing region updating (RAU, Routing Area Update) process.TA1 and TA2 are the tracing area of SAE, be similar to the RA in 2G/3G network, wherein the coverage of TA1 and RA1 has overlapping part, so in the time that a multimode UE moves in these regions, may cause network registration process frequently, for example UE enters the Serving GPRS Support Node (SGSN of RA1 to 2G/3G, Serving GPRS Support Node) registration, when UE enters TA1 again to the mobile management entity (MME of SAE network, Mobility Management Entity) registration, when UE moves out TA1, SGSN registration to 2G/3G again while again entering RA1, so wasted a large amount of interface-free resources.

For avoiding the problems referred to above, limitation signaling rule has been proposed in prior art, its core concept is for adhering to post-registration to a kind of access network as UE, after moving to again afterwards another access network, be registered to again another access network, like this, UE just can be registered to two kinds of access networks simultaneously, and UE can not initiate registration process while moving in these two kinds of access networks again.

And control method for deleting load-bearing of the prior art is the deleting load-bearing control flow that is adapted to single network, for example, when UE adheres in 2G/3G network, if there is the switching of SGSN, the former SGSN adhering to receives attaching position register (HLR, Home Location Register) can be initiated to Gateway GPRS Support Node (GGSN after the Cancel Location request that sends, Gateway GPRS Support Node) Delete PDP Context Request message, PDP Context information is deleted in request, to prevent having not deleted PDP Context information after UE from exiting last time extremely.If there is not the change of SGSN, SGSN also can be initiated to Gateway GPRS Support Node (GGSN, Gateway GPRS Support Node) Delete PDP Context Request message, PDP Context information is deleted in request, to prevent having not deleted PDP Context information after UE from exiting last time extremely.

But in the network of limitation signaling system, SGSN can be connected to gateway (S-GW, Sewing Gateway), S-GW can be connected to grouped data network gateway (P-GW, PDN Gateway), in such scheme, do not relate to the deleting load-bearing control procedure of SGSN to S-GW and S-GW to P-GW, so the deleting load-bearing control program of prior art is a deleting load-bearing control for single network internal all, and can not carry out the deleting load-bearing control of across a network, so affect the versatility of deleting load-bearing control.

Summary of the invention

The technical problem that the embodiment of the present invention will solve is to provide a kind of control method for deleting load-bearing and home subscriber server and relevant device, can improve the versatility of deleting load-bearing control flow.

The control method for deleting load-bearing that the embodiment of the present invention provides, comprising: intermediate NE receives the deletion type indication parameter that home subscriber server sends; If described deletion type indication parameter is designated as type of attachment, and has relevant bearer, delete described intermediate NE to gateway and gateway to the carrying between grouped data network gateway.

The control method for deleting load-bearing that the embodiment of the present invention provides, comprising: intermediate NE receives the deletion type indication parameter that home subscriber server sends; If described deletion type indication parameter is designated as updating type, judge whether to receive gateway and change mark, if receive, delete described intermediate NE to the carrying between former gateway, if do not receive, delete the customer equipment context information of the local storage of intermediate NE.

The control method for deleting load-bearing that the embodiment of the present invention provides, comprising: former intermediate NE receives context acknowledgement message or the explicit signaling that new intermediate NE sends; Judge that in described context acknowledgement message or explicit signaling, whether comprising gateway changes mark, if comprise, and there is relevant bearer, delete former intermediate NE to the carrying between gateway, if do not comprise, only delete former intermediate NE customer equipment context information.

The control method for deleting load-bearing that the embodiment of the present invention provides, comprising: after subscriber equipment initiates to adhere to request, home subscriber server receives the position updating request that intermediate NE sends; Whether the intermediate NE that judges the original registration of described subscriber equipment changes, if change, sends position removal request to the former intermediate NE of another system of former intermediate NE and user's registration; If there is relevant bearer, former intermediate NE and the former intermediate NE of another system are deleted it to gateway and gateway to the carrying between grouped data network gateway.

The control method for deleting load-bearing that the embodiment of the present invention provides, comprising: new intermediate NE obtains contextual information to the former intermediate NE in the former intermediate NE of system and another system of user equipment registration at self place; Feedback packet is containing the acknowledge message of deleting type indication parameter; Type indication parameter is deleted in former intermediate NE judgement, if be designated as type of attachment, deletes the carrying between grouped data network gateway; If instruction updating type, judges whether to comprise gateway and changes mark, if comprise, delete former intermediate NE to the carrying between former gateway, if do not comprise, delete customer equipment context information in this network element.

The intermediate NE that the embodiment of the present invention provides, comprising: state acquiring unit, for obtaining the network state of subscriber equipment; Parameter set unit, for judging according to the user equipment network state getting whether subscriber equipment adheres to or enter for the first time network, and if so, updating type indication parameter is set is type of attachment, if not, updating type indication parameter being set is updating type; Message sending unit, for sending the location update message that comprises updating type indication parameter to home subscriber server.

The intermediate NE that the embodiment of the present invention provides, comprising: context receiving element, delete message or other explicit message for receiving context request message or context acknowledgement message or position; Change judging unit, for judging that described context request message or context acknowledgement message or position delete message or explicit message and whether adhere to more new logo or further comprise gateway and change mark of mark or position; Delete performance element, delete and in message or other explicit message, comprise while adhering to mark when context request message or context acknowledgement message or position, initiate to gateway and gateway to the deleting load-bearing request between grouped data network gateway; If comprise more new logo of position in described message, and comprise gateway and change when mark, initiate the deleting load-bearing request to gateway, change mark and delete self user's context if do not comprise gateway.

The home subscriber server that the embodiment of the present invention provides, comprising: receiving element, the location update message sending for receiving intermediate NE; Transmitting element, deletes message for sending position to intermediate NE; It is the updating type indication parameter in the location update message received of receiving element that the deletion type indication parameter carrying in message is deleted in described position, change mark if carry gateway in the location update message that receiving element is received, in the position deletion message that transmitting element sends, also carry described gateway and change mark.

The gateway that the embodiment of the present invention provides, comprising: message sink unit, the deleting load-bearing request or the block data protocol context removal request that send for receiving intermediate NE; Message judging unit, for judging the information of deleting grouped data network gateway carrying that whether comprises of deleting load-bearing request or block data protocol context deletion request message; Deleting load-bearing unit, for the information of deleting grouped data network gateway carrying that comprises when described deleting load-bearing request or block data protocol context deletion request message, and while there is relevant bearer, be initiated to the deleting load-bearing request of grouped data network gateway, otherwise, only delete the customer equipment context of self.

As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:

In the embodiment of the present invention, because intermediate NE receives the position deletion message that comprises deletion type indication parameter that home subscriber server sends, determine that according to deleting type indication parameter this process is renewal process or attaching process, thereby how to determine deleting bearing, for example deleting type indication parameter is designated as while adhering to, if there is carrying, delete intermediate NE to gateway and gateway to the carrying between grouped data network gateway.So the embodiment of the present invention can be carried out deleting load-bearing control for dual network in limitation signaling rule, apparent, the embodiment of the present invention is equally applicable to the situation of single network, so improved the versatility of deleting load-bearing control flow.

Brief description of the drawings

Fig. 1 is network coverage stack schematic diagram in prior art;

Fig. 2 is control method for deleting load-bearing the first embodiment schematic diagram in the embodiment of the present invention;

Fig. 3 is control method for deleting load-bearing the second embodiment schematic diagram in the embodiment of the present invention;

Fig. 4 is control method for deleting load-bearing the 3rd embodiment schematic diagram in the embodiment of the present invention;

Fig. 5 is control method for deleting load-bearing the 4th embodiment schematic diagram in the embodiment of the present invention;

Fig. 6 is control method for deleting load-bearing the 5th embodiment schematic diagram in the embodiment of the present invention;

Fig. 7 is control method for deleting load-bearing the 6th embodiment schematic diagram in the embodiment of the present invention;

Fig. 8 is intermediate NE the first embodiment schematic diagram in the embodiment of the present invention;

Fig. 9 is intermediate NE the second embodiment schematic diagram in the embodiment of the present invention;

Figure 10 is home subscriber server embodiment schematic diagram in the embodiment of the present invention;

Figure 11 is S-GW embodiment schematic diagram in the embodiment of the present invention.

Embodiment

The embodiment of the present invention provides a kind of control method for deleting load-bearing and home subscriber server and relevant device, for improving the versatility of deleting load-bearing control flow.

In the embodiment of the present invention, control method for deleting load-bearing can roughly be divided into following two classes:

One, flow process is deleted in system internal trigger position:

Specifically can be subdivided into again following several situation:

1, first UE is registered to universal mobile telecommunications system (UMTS, Universal Mobile Telecommunication System):

Refer to Fig. 2, in the embodiment of the present invention, control method for deleting load-bearing the first embodiment comprises:

201, request is adhered to;

UE initiates to adhere to request to SGSN;

202, identify alternately;

If new SGSN is not the former SGSN of the original registration of UE, new SGSN sends identification request to obtain the IMSI of UE to former SGSN.

If 203 new SGSN do not obtain the IMSI of UE, new SGSN initiates identification request to obtain the IMSI of UE to UE;

204, may carry out authentication process;

UE carries out authentication by new SGSN and home subscriber server (HSS, Home Subscriber Server).

If 205 new SGSN are former SGSN of the original registration of UE, if there is the UE carrying that last time, abnormal shutdown was left over, initiation packet data protocol (PDP) context removal request;

New SGSN sends Delete PDP Context Request to S-GW.

206, send deleting load-bearing request;

S-GW sends deleting load-bearing request to P-GW.

207, feedback deleting load-bearing response;

208, feedback PDP Context is deleted response;

If 209 new SGSN are not the former SGSN of the original registration of UE, new SGSN sends position updating request (Update Location);

New SGSN sends Update Location to HSS.

210, between former SGSN and HSS, carry out position and delete flow process (Cancel Location);

If the former SGSN of the 211 new SGSN original registration that is not UE, and if former SGSN there is the UE carrying that last time, abnormal shutdown was left over, delete the PDP Context of former SGSN to S-GW;

212, delete the carrying of S-GW to P-GW;

213, may carry out HSS and insert user data to new SGSN;

214, HSS is to new SGSN feedback Update Location response;

215, new SGSN adheres to acceptance to UE feedback, completes attachment flow.

In the present embodiment, step 205 to step 208 and step 211 and step 212 is the processes of deleting old carrying.If the node of UE Detach last time and this Attach is same, new SGSN, if the PDP Context haveing been friends in the past performs step 205 to step 208, and can not perform step 209 to 214.

Otherwise, if the node of UE Detach last time and this Attach is not same, if there is former SGSN to have not deleted PDP Context, performs step 211 and 212, and do not perform step 205 to 208.

S-GW further triggers the carrying of deleting P-GW after receiving Delete PDP Context Request.

2, UE is registered to UMTS and moves to SAE again:

Refer to Fig. 3, in the embodiment of the present invention, control method for deleting load-bearing the second embodiment comprises:

301, send TAU request;

UE sends TAU Request to new MME.

302, new MME sends context request to the SGSN of the original registration of UE;

303, SGSN is to new MME feedback contextual information;

304, may carry out authentication process;

Former MME when if 305 new MME are UE attachment removal last time, or there is abnormal carrying of shutting down last time, send deleting load-bearing request;

New MME sends deleting load-bearing request to S-GW.

306, S-GW sends deleting load-bearing request to P-GW;

307, feedback deleting load-bearing response;

308, feedback deleting load-bearing response;

309, new MME is to SGSN feedback context acknowledgement message or explicit signaling;

310, new MME is consistent with the carrying of 2G/3G to ensure to the request of S-GW transmission load creating;

311, S-GW sends bearer update request to P-GW;

312, P-GW is to the response of S-GW feedback bearer update;

313, S-GW is to the response of new MME feedback load creating;

Mobility Management Entity when if 314 new Mobility Management Entity are not UE attachment removal last time, new MME sends Update Location to HS S;

315, former MME and HSS carry out Cancel Location flow process;

If 316 former MME find that UE leaves the carrying of abnormal shutdown, deletes this carrying;

317, delete the carrying between S-GW to P-GW;

318, may insert user data to new MME by HSS;

319, HSS is to new MME feedback Update Location response;

320, new MME accepts message to UE feedback TAU;

If 321 S-TMSI change, UE completes message to new MME feedback TAU.

In the present embodiment, under limitation signaling rule, UE enters after SAE, initiates TAU instead of Attach, new MME obtains the context of UE from SGSN, if new MME is the former MME of last time when UE Detach, getting after the IMSI of UE, need to be by the deleting load-bearing of abnormal shutdown last time, therefore trigger execution step 205 to 208, new MME distributes to TEID from its GTP-C to S-GW sends Delete Bearer Request, request S-GW deleting bearing, and S-GW further initiates removal request to P-GW.

If MME changes, further be triggered to the Update Location of HSS, HSS sends Cancel Location to former MME, because UE enters SAE for the first time, for preventing that leaving last time shuts down extremely at former MME, the request that former MME can be initiated to S-GW and arrives the Delete Bearer of P-GW again.

It should be noted that in superincumbent flow process, although new MME receives is TAU, and obtained Context from SGSN, still will delete old Context, register at SAE for the first time because this is UE.And generally, new MME receives after TAU, be to initiate to delete Context, it triggers reason may two:

In the TAU that A, UE initiate, carry sign-on ID, this sign-on ID instruction UE registers SAE for the first time, and sign-on ID is attach flag for example, represents that the similar Attach of UE is to SAE;

The Context that B, new MME obtain from SGSN recognizes oneself to be the equal of the Attach of UE, if SGSN does not also set up the Association with the limitation signaling of MME, instruction of portability, if or SGSN has set up and the Association of former MME, carry instruction or other parameters, do not have the words of setting up not carry this parameter/instruction, make new MME recognize similar UE Attach, need to delete old carrying.

The above-mentioned UE that introduced is first registered to UMTS, moves to afterwards the handling process of SAE, is understandable that, UE is first registered to SAE, and the handling process that moves to afterwards UMTS is corresponding with above-mentioned flow process, repeats no more herein.

Introduce the situation that network entity changes below:

3, UE changes MME in the situation that limitation signaling activates, originally under SGSN:

Refer to Fig. 4, in the embodiment of the present invention, control method for deleting load-bearing the 3rd embodiment comprises:

401, send TAU request;

UE sends TAU Request to new MME.

402, new MME sends context request to SGSN;

403, SGSN is to new MME feedback contextual information;

404, may carry out authentication process;

405, new MME sends context acknowledgement message or explicit signaling to SGSN;

406, owing to changing MME, need to set up new carrying.；

New MME sends load creating request to S-GW.

If 407 S-GW change, send bearer update request;

S-GW sends bearer update request to P-GW.

408, feedback bearer update response;

409, feedback load creating response;

410, new MME sends Update Location to HSS;

411, former MME and HSS carry out Cancel Location flow process;

If 412 S-GW change, former MME initiates deleting bearing to S-GW, if S-GW does not change, former MME only need delete the UE context that self preserves;

413, HSS may insert user data to new MME;

414, HSS is to new MME feedback Update Location response;

415, new MME accepts message to UE feedback TAU;

416, UE completes message to new MME feedback TAU.

From the embodiment shown in Fig. 3 and Fig. 4 relatively see, former MME only receives the position removal request that HSS sends, but needs are deleted the carrying to P-GW, whether one change according to S-GW, only deletes to the carrying of S-GW or the information of only deleting MME.Therefore, under current mechanism, be, to be difficult to accomplish to distinguish operation how to carry out deleting load-bearing.The invention provides several method to carry out correct differentiation and operation.

In the present embodiment, specifically there are three kinds of methods that realize deleting load-bearing control:

A、

In the time of certain system of access, if limitation signaling activates, obtain context to the former intermediate NE of all connecting systems, instead of only obtain to a kind of former intermediate NE of system.

As, UE accesses after new MME, new MME obtains UE context to former MME and former SGSN simultaneously, former like this MME understands according to new MME whether UE is access for the first time in context acknowledgement message, and S-GW modification information, determine whether being initiated to the deleting bearing request of S-GW, if S-GW changes, delete the carrying of new MME to former S-GW, if S-GW does not change, only delete the UE Context of self, if UE accesses this system for the first time, delete the carrying of new MME to P-GW, if UE accesses this system for the first time, do not need to delete the carrying of new MME to P-GW.Or UE after connecting system, can not initiate context request to native system entity for the first time.Therefore, old entity only needs basis whether to receive context request/confirmation, and wherein whether parameter indicates S-GW change and determines how deleting bearing is (as in this example, former MME is according to receiving context request/confirmation, determine can not be initiated to the deleting load-bearing of P-GW, if but S-GW change is initiated to the deleting load-bearing of S-GW, otherwise only deletes the UE context of former MME self).

Be that new intermediate NE is got Context to the former intermediate NE of two systems, in the acknowledge message of simultaneously returning to origin node in system, comprise Update/Attach instruction and S-GW Change instruction or similar information, how old node can determine deleting bearing (Attach directly deletes the carrying of arriving P-GW after representing to receive Cancel Location) according to this information.Or if Attach, do not get the Context of native system (being new access node volume system), if general position is upgraded, need to obtain the Context of two systems, if the old node of this sample system is received the Cancel Location that HSS sends, be directly initiated to the deleting load-bearing of P-GW.Otherwise if receive Context Request or Acknowledge, according to S-GW Change instruction, decision is to delete self Context or the carrying of deleting S-GW.

Illustrate: in the renewal process of general position, be that UE is in the situation that limitation signaling activates, new access node is initiated Context to the origin node of two systems and is obtained, the Context Acknowledge sending at the origin node to native system comprises S-GW Change instruction, represents that S-GW changes.This sample system origin node is received after Cancel Location, according to whether receiving that Context Acknowledge and S-GW changed instruction, determines that being initiated to P-GW still still only deletes self Context to the deleting load-bearing of S-GW.

B、

In Update Location, carry Update Type instruction, indicate the process that this Update Location is similar Attach (being to enter for the first time this system after UE Detach), or common position updating process, if general position renewal process also will be carried the instruction whether S-GW changes.

The Cancel Location that mails to former entity (as former MME) at HSS carries this information (Cancellation Type equally, value equals or is equivalent to Update Type information), like this, if Cancellation Type is Attach (representing to enter for the first time this network after UE Detach), if there is relevant bearer in old entity, be initiated to S-GW until the deleting load-bearing process of P-GW, as former MME will directly initiate Delete Bearer to S-GW until P-GW with the suppressing exception carrying of leaving over of shutting down;

As the Cancellation Type carrying is RAU/TAU (representing that UE once entered this network), further see mark or other expression altered information of S-GW (being designated example with S-GW Change in the present embodiment) of whether carrying S-GW Change, if carry, be that S-GW changes, former entity is initiated to the deleting load-bearing process of S-GW, otherwise, only delete the UE Context in self entity.

As in the present embodiment, if find the Cancel Location message that former MME receives from HSS, Cancellation Type is TAU, and carry the mark of S-GW Change, former MME initiates Delete Bearer Request (S-GW change) to S-GW, S-GW receives this message, find wherein to carry the instruction that S-GW changes, so S-GW no longer initiates deleting bearing to P-GW, if former MME finds that in Cancel Location message, Cancellation Type is TAU, and do not carry the mark of S-GW Change or the information that other expressions S-GW does not change, only delete the UE context of self record, needn't initiate deleting load-bearing process to S-GW.If former MME finds that in Cancel Location message, Cancellation Type is Attach, if there is relevant bearer, former MME initiates Delete Bearer Request to S-GW to former S-GW, S-GW, because of the instruction of not receiving S-GW Change, continues to be initiated to the deleting load-bearing process of P-GW.

C、

Or novel entities directly sends message to former entity in system and notifies, for example, in this example, owing to being general T AU, new MME, before 410 steps, sends Context Acknowledge/ or other message notifies whether S-GW changes to former MME; Former MME receives this message, understanding is that general T AU (does not send this message if UE enters SAE system for the first time, or by some parameter identification general T AU or similar Attach process in message), this message is the parameter of portability S-GW Change information also, if S-GW changes, former MME sends deleting bearing to former S-GW, but the carrying that can not delete P-GW, if S-GW does not change, former MME only deletes the UE Context that self retains.Or, after SGSN recognizes that MME changes, set up Association with new MME, send message informing to former MME and cancel Association, thereby former MME understands UE has initiated common TAU, whether to the Context Acknowledge notice SGSN that MME sends if there is change in S-GW, thus the message of carrying S-GW Change in the message that SGSN determines whether to send to former MME.Thereby former MME determines the deleting load-bearing request that whether is initiated to S-GW and still only deletes self UE Context.

In a word, if common position is upgraded, needn't be initiated to the deleting load-bearing process of P-GW.Follow S-GW to change if position is upgraded, intermediate NE (SGSN or MME) is initiated deleting load-bearing to former S-GW, but can not continue to be initiated to the deleting load-bearing of P-GW again.If S-GW does not change, intermediate NE only need to be deleted the UE Context that self preserves.If Attach or similar Attach process (being to enter for the first time certain system after UE Detach), the last time of this system, intermediate NE when Detach need to be deleted to S-GW until the carrying of P-GW (if this carrying exists) is left over the carrying that prevents the abnormal shutdown of UE.

In the present embodiment, in the time that changing, MME can take various ways to realize deleting load-bearing control flow, so improved the flexibility of control method for deleting load-bearing in the embodiment of the present invention.

Similarly introduce the situation in SGSN below,

4, UE changes SGSN under limitation signaling, originally under MME:

Refer to Fig. 5, in the embodiment of the present invention, control method for deleting load-bearing the 4th embodiment comprises:

501, send RAU request;

UE sends RAU Request to new SGSN.

502, new SGSN sends context request to MME;

503, MME is to new SGSN feedback contextual information;

504, may carry out authentication process;

505, new SGSN sends context acknowledgement message or explicit signaling to MME;

506, send PDP Context request to create;

New SGSN sends PDP Context request to create to S-GW.

If 507 S-GW change, or parameter changes, and sends bearer update request;

S-GW sends bearer update request to P-GW.

508, feedback bearer update response;

509, feedback PDP Context creates response;

510, new SGSN sends Update Location to HSS;

511, former SGSN and HSS carry out Cancel Location flow process;

512, delete PDP Context;

513, HSS may insert user data to new SGSN;

514, HSS is to new SGSN feedback Update Location response;

515, new SGSN accepts message to UE feedback RAU;

516, UE completes message to new SGSN feedback RAU.

In the present embodiment, the similar description of embodiment above of the mode of specific implementation deleting load-bearing control.The deleting load-bearing message just new SGSN being sent to S-GW changes Delete PDP Context Request and Delete PDP Context Response into.Wherein work as S-GW and change, the parameter that Delete PDP Context Request need to carry S-GW Change.As shown in the table in this message modification:

Information element	Presence requirement
		Teardown Ind	Conditional
NSAPI	Mandatory
		Protocol Configuration Options	Optional
Private Extension	Optional
		S-GW Change	Conditional

The new parameter of adding is the parameter that S-GW Change or other expression S-GW change, and as used Cause (reason), wherein uses some cause value to represent the information of S-GW conversion, in the situation that S-GW changes, needs to carry.

5, UE changes SGSN under limitation signaling, originally under SGSN:

Refer to Fig. 6, in the embodiment of the present invention, control method for deleting load-bearing the 5th embodiment comprises:

601, send RAU request;

UE sends RAU Request to new SGSN.

602, new SGSN sends context request to former SGSN;

603, former SGSN is to new SGSN feedback contextual information;

604, may carry out authentication process;

605, new SGSN sends context acknowledgement message or explicit signaling to former SGSN;

606, send PDP Context request to create;

New SGSN sends PDP Context request to create to S-GW.

607, send bearer update request;

S-GW sends bearer update request to P-GW.

608, feedback bearer update response;

609, feedback PDP Context creates response;

610, new SGSN sends Update Location to HSS;

611, former SGSN and HSS carry out Cancel Location flow process;

612, between former SGSN and former S-GW, delete PDP Context;

613, between new SGSN and HSS, insert user data;

614, HSS is to new SGSN feedback Update Location response;

615, new SGSN accepts message to UE feedback RAU;

616, UE completes message to new SGSN feedback RAU.

In the present embodiment, former SGSN can be general T AU by Context Acknowledge understanding process.If but S-GW change, the information that also needs to carry S-GW Change in Context Acknowledge, because if S-GW changes, former SGSN will send Delete PDP Context Request to S-GW and make the upper UE of deletion of S-GW Context;

If S-GW does not change, former SGSN oneself deletes the Context of UE.

If S-GW receives Delete PDP Context Request from SGSN, if do not carry the mark of S-GW Change in this message, think that UE initiates Attach, should further initiate Delete Bearer message to P-GW.

Therefore, also need to revise the context acknowledgement message between existing SGSN, as shown in the table:

Information element	Presence requirement
		Cause	Mandatory
Tunnel Endpoint Identifier Data II	Conditional
		SGSN Address for user traffic	Conditional
Private Extension	Optional
		S-GW Change	Conditional

In this message, need to add the parameter of S-GW Change or the parameter that other expression S-GW changes, as used Cause (reason), wherein use some cause value to represent the information of S-GW conversion, in the time that changing, need to carry S-GW.

Be understandable that, originally under MME, it is basically identical that UE changes embodiment and above-described embodiment of MME under limitation signaling, repeats no more.

Flow process is deleted in the position of two, triggering dual network:

Refer to Fig. 7, in the embodiment of the present invention, control method for deleting load-bearing the 6th embodiment comprises:

701, request is adhered to;

UE initiates to adhere to request to new MME;

702, identify alternately;

Between new MME and former MME, send identification request and obtain the IMSI of UE.

If 703 do not get the IMSI of UE, obtain its IMSI704, may carry out authentication to UE;

UE carries out authentication by MME and HSS.

If entity when 705A～705D UE Detach last time is exactly the entity accessing now, carry out deleting load-bearing request and the response carrying with suppressing exception shutdown;

706, send Update Location;

New MME sends Update Location to HSS.

707, between former MME and HSS, carry out position and delete flow process;

708A～708B, deleting load-bearing request;

709, between SGSN and HSS, carry out position and delete flow process;

710A～710B, deletion PDP Context and deleting load-bearing request;

711, between new MME and HSS, insert user data;

712, HSS is to new MME feedback Update Location response.

In the present embodiment, UE, after new MME registration, sends Update Location to HSS, and HSS initiates Cancel Location to former MME and former SGSN, and the Context of UE is deleted.Because if MME does not change and still retain the Context of UE, possible MME can not send Update Location to HSS, therefore the UE Context of SGSN cannot be deleted.Therefore,, if UE initiates Attach, even if MME does not change, also can force MME to be initiated to the UpdateLocation of HSS;

If HSS finds that the MME preserving is the same with the MME that sends Update Location, illustrate that UE does not change MME, so needn't send Cancel Location to the MME of record, but can send Cancel Location to the SGSN of record, SGSN receives rear deletion relevant bearer (to P-GW).

For differentiation and the Update Location of common RAU/TAU, in Update Location, should carry " attach flag " or " RAU/TAU flag " or " update type " is " attach " still mark of " update ".Still copy from update type at cancellation type, if S-GW changes, the mark that may also will carry S-GW Change.

Due to UE at Attach after SAE, Cancel Location is to former SGSN HSS, therefore next UE enters after SGSN, HSS can not send Cancel Location again to former SGSN, can not carry out deleting load-bearing yet and operate.Even if UE does not change SGSN, owing to there is no the Context of UE in SGSN, also can initiate Update Location to HSS.

Find out from above, because UE only sends out Attach Request one time, and after Attach, enter for the first time after other RAT, still send RAU or TAU, use mode (while being Attach, the entity of every other UE registration last time being deleted to UE context) above, so just do not need to judge whether UE is to enter for the first time this RAT after start, thereby receiving after RAU or TAU also and will, at Update Location mark Attach, make former entity delete the carrying of UE.

Being attached to SAE taking UE is above introduced as example, the same when first UE is attached to 2G/3G principle, be that UE sends Attach Request to certain intermediate NE, this intermediate NE directly sends position updating request (Update Type is Attach) to HSS, HSS sends Cancel Location and deletes UE Context to former intermediate NE (intermediate NE in 2G/3G and SAE), delete the carrying that UE leaves over simultaneously, thereby needn't identify specially whether be similar Attach in the time that UE enters another system next time.

Introduce the device in the embodiment of the present invention below, refer to Fig. 8, in the embodiment of the present invention, intermediate NE the first embodiment comprises:

State acquiring unit 801, for obtaining the network state of subscriber equipment;

Parameter set unit 802, for judging according to the user equipment network state getting whether subscriber equipment adheres to or enter for the first time network, and if so, updating type indication parameter is set is type of attachment, if not, updating type indication parameter being set is updating type;

Message sending unit 803, for sending the location update message that comprises updating type indication parameter to home subscriber server.

Refer to Fig. 9, in the embodiment of the present invention, intermediate NE the second embodiment comprises:

Context receiving element 901, deletes message or other explicit message for receiving context request message or context acknowledgement message or position;

Change judging unit 902, for judging that described context request message or context acknowledgement message or position delete message or other explicit message and whether adhere to more new logo or further comprise gateway and change mark of mark or position;

Delete performance element 903, delete and in message or other explicit message, comprise while adhering to mark when context request message or context acknowledgement message or position, initiate to gateway and gateway to the deleting load-bearing request between grouped data network gateway; If comprise more new logo of position in described message, and comprise gateway and change when mark, initiate the deleting load-bearing request to gateway, change mark and delete self user's context if do not comprise gateway.

Refer to Figure 10, in the embodiment of the present invention, home subscriber server embodiment comprises:

Receiving element 1001, the location update message sending for receiving intermediate NE;

Transmitting element 1002, deletes message for sending position to intermediate NE;

It is the updating type indication parameter in the location update message received of receiving element that the deletion type indication parameter carrying in message is deleted in described position, change mark if carry gateway in the location update message that receiving element is received, in the position deletion message that transmitting element sends, also carry described gateway and change mark.

Refer to Figure 11, in the embodiment of the present invention, gateway embodiment comprises:

Message sink unit 1101, the deleting load-bearing request or the block data protocol context removal request that send for receiving intermediate NE;

Message judging unit 1102, for judging the information of grouped data network gateway carrying of deleting whether comprising of deleting load-bearing request or block data protocol context deletion request message (as carry gateway and change mark and represent that not needing to delete grouped data network gateway carries, otherwise need deleting bearing);

Deleting load-bearing unit 1103, for the information of deleting grouped data network gateway carrying that comprises when deleting load-bearing request or block data protocol context deletion request message, and while there is relevant bearer, be initiated to the deleting load-bearing request of grouped data network gateway, otherwise, only delete the customer equipment context of self.

It should be noted that, in the embodiment of the present invention with adhere to mark, more new logo, gateway change that mark represents that UE adheres to or Detach after enter for the first time certain network, whether UE not enters for the first time certain network, changes for the S-GW of this UE, in fact, can make otherwise to represent these situations, as use some cause value, and needn't use mark.The embodiment of the present invention is only to provide a kind of possibility, does not limit the mode that can express this difference.

One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is can carry out the hardware that instruction is relevant by program to complete, described program can be stored in a kind of computer-readable recording medium, this program, in the time carrying out, comprises the steps: that intermediate NE receives the localization message that comprises align_type that home subscriber server sends; Judge whether described align_type is type of attachment, if so, delete described intermediate NE to gateway and gateway to the carrying between grouped data network gateway.

The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.

Above a kind of control method for deleting load-bearing provided by the present invention and home subscriber server and relevant device are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1. a control method for deleting load-bearing, is characterized in that, comprising:

Intermediate NE obtains the network state of subscriber equipment;

Described intermediate NE judges according to the user equipment network state getting whether subscriber equipment adheres to or enter for the first time network, if adhere to or enter for the first time network, it is type of attachment that updating type indication parameter is set, if not adhere to or enter for the first time network, it is updating type that updating type indication parameter is set;

Described intermediate NE sends the location update message that comprises updating type indication parameter to home subscriber server, described location update message makes described home subscriber server send and comprise the position deletion message of deleting type indication parameter to former intermediate NE, described position is deleted message and is made described former intermediate NE, when described deletion type indication parameter is designated as type of attachment, and while there is relevant bearer, delete described former intermediate NE to gateway and gateway to the carrying between grouped data network gateway.

2. control method for deleting load-bearing according to claim 1, is characterized in that, described intermediate NE is mobile management entity, or is Serving GPRS Support Node.

3. a control method for deleting load-bearing, is characterized in that, comprising:

Intermediate NE receives context request message or context acknowledgement message or position and deletes message or other explicit message;

Described intermediate NE judges that described context request message or context acknowledgement message or position delete whether to comprise in message or explicit message and adheres to more new logo or further comprise gateway and change mark of mark or position;

Described intermediate NE, deletes and in message or other explicit message, comprises while adhering to mark when context request message or context acknowledgement message or position, initiates to gateway and gateway to the deleting load-bearing request between grouped data network gateway; If comprise more new logo of position in described message, and comprise gateway and change when mark, initiate the deleting load-bearing request to gateway, change mark and delete self user's context if do not comprise gateway.

4. control method for deleting load-bearing according to claim 3, is characterized in that, described intermediate NE is mobile management entity, or is Serving GPRS Support Node.

5. a home subscriber server, is characterized in that, comprising:

After initiating to adhere to request at subscriber equipment, receive the module of the position updating request of intermediate NE transmission;

Whether change for the intermediate NE that judges the original registration of described subscriber equipment, if change, send the module of position removal request to the former intermediate NE of another system of former intermediate NE and user registration, if to make described former intermediate NE and the former intermediate NE of another system have relevant bearer, delete described former intermediate NE and the former intermediate NE of another system to the carrying between gateway, and gateway is to the carrying between grouped data network gateway.

6. home subscriber server according to claim 5, is characterized in that, described intermediate NE is mobile management entity, or is Serving GPRS Support Node.

7. an intermediate NE, is characterized in that, comprising:

State acquiring unit, for obtaining the network state of subscriber equipment;

Parameter set unit, for judging according to the user equipment network state getting whether subscriber equipment adheres to or enter for the first time network, if adhere to or enter for the first time network, it is type of attachment that updating type indication parameter is set, if not adhere to or enter for the first time network, it is updating type that updating type indication parameter is set;

Message sending unit, for sending the location update message that comprises updating type indication parameter to home subscriber server;

Context receiving element, deletes message or other explicit message for receiving context request message or context acknowledgement message or position;

Change judging unit, for judging that described context request message or context acknowledgement message or position delete message or explicit message and whether comprise and adhere to more new logo or further comprise gateway and change mark of mark or position; With

Delete performance element, delete and in message or other explicit message, comprise while adhering to mark when context request message or context acknowledgement message or position, initiate to gateway and gateway to the deleting load-bearing request between grouped data network gateway; If comprise more new logo of position in described message, and comprise gateway and change when mark, initiate the deleting load-bearing request to gateway, change mark and delete self user's context if do not comprise gateway.