CN103155688B

CN103155688B - The processing method of a kind of carrying, system and device

Info

Publication number: CN103155688B
Application number: CN201180001575.XA
Authority: CN
Inventors: 陆峰; 银宇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2016-07-13
Anticipated expiration: 2031-08-31
Also published as: CN103155688A; WO2013029245A1

Abstract

The present invention relates to communication technical field, particularly relate to the processing method of a kind of carrying, system and device.The processing method of a kind of carrying provided by the invention, after source network side shifting managed network element knows the information of carrying that target network side can not create or retain, described source network side shifting managed network element trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, and described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain.By method provided by the invention so that when being moved management process, block domain data network gateway can the delete target network side information of carrying that can not create or retain.

Description

The processing method of a kind of carrying, system and device

Technical field

The present invention relates to communication technical field, particularly relate to the processing method of a kind of carrying, system and device.

Background technology

In the process that network develops to broadband, mobile, 3GPP (The3rdGenerationPartnershipProgram, third generation partner program) propose LTE (LongTermEvolution in Mobile Access Network side, Long Term Evolution) plan, i.e. E-UTRAN (EvolvedUniversalMobileTelecommunicationSystemTerritorial RadioAccessNetwork, evolved universal mobile communication system land radio access web)；SAE (SystemArchitectureEvolution, System Architecture Evolution) plan, i.e. EPC (EvolvedPacketCore, evolution block core net) is proposed in core-network side.E-UTRAN and EPC constitutes EPS (EvolvedPacketSystem, evolved packet system).UE (UserEquipment, subscriber equipment) E-UTRAN can be passed through, UTRAN (UniversalMobileTelecommunicationSystemTerritorialRadioAc cessNetwork, UMTS land radio access web), any one access way in GERAN (GSMEDGERadioAccessNetwork, GSM EDGE Radio Access Network) accesses EPC.Fig. 1 is current wireless evolution network framework figure.

As shown in Figure 1, EPC is specifically including but not limited to MME (MobilityManagementEntity, Mobility Management Entity), SGSN (ServingGPRSSupportNode, Serving GPRS Support Node), SGW (ServingGateway, gateway) and PGW (PDNGateway, block domain data net gateway).Wherein, the function such as the tracking under MME/SGSN primary responsibility NAS (NonAccessStratum, Non-Access Stratum) signaling management, bearer management and user's idle pulley and paging management；The mobility anchor point of SGW primary responsibility this locality and the function such as the mobility anchor point of 3GPP internal system and Lawful Interception relevant information；PGW primary responsibility strategy execution and charging and Lawful Interception correlation function.Wherein, MME and SGSN is referred to as mobile management net element.

As it is shown in figure 1, the wireless access part of 2G network is GERAN, it is made up of BTS (BaseTransceiverStation, base transceiver station) and BSC (BaseStationController, base station controller)；The wireless access part of 3G network is UTRAN, is made up of RNC (RadioNetworkController, radio network controller) and NodeB (node B)；The wireless access part of LTE network is E-UTRAN, is made up of eNodeB (EvolvedNodeB, evolved base station).

When moving to the service area of another wireless access network element from the service area of a wireless access network element, the UE being in idle condition can trigger TAU (TrackingAreaUpdate, tracking area location updating) flow process or RAU (RoutingAreaUpdate, Route Area location updating) flow process；The UE being in connection status can trigger Handover (switching) flow process.Wherein, above-mentioned TAU flow process, RAU flow process and Handover flow process are referred to as mobile management flow process.This mobile management flow process is likely to trigger MME/SGSN corresponding to UE and changes, and is likely to trigger SGW corresponding for this UE and changes.When triggering said network element and changing, then need to set up the bearer context of this UE in target network side, and delete the bearer context of this UE in source network side.The embodiment of the present invention, the network that UE moves front place is called source network side, and the network that UE moves rear place is called target network side.

Fig. 2 be UE trigger TAU flow process realize process schematic, wherein:

Step S202-step S203:UE sends TAU to target network side MME and asks message；

Step S204-step S207: target network side MME passes through context response information obtains the bearer context information of UE from source network side MME, and is changed by the SGW in context acknowledgement message instruction this TAU flow process of source network side MME；

Step S208-step S211: create the bearer context of UE in target network side, and update the carrying between target network side SGW and PGW；

Step S218-step S219: delete the bearer context of this UE on source network side MME and source network side SGW.

By the analysis to prior art, inventor thinks that prior art at least there is problems in that

When being moved management process, only deleting source network side at source network side MME and source network side SGW in prior art is the UE bearer context created, and default packet numeric field data network gateway PGW will continue to be left the UE bearer context created, but, when being moved management process, due to local policy or other reasons, some carrying is likely to create or retain in target network side, the information making these carryings is likely to be stored in PGW for a long time, causes the waste of bearer context resource in EPC network.

Summary of the invention

Embodiments providing the processing method of a kind of carrying, system and device so that when being moved management process, block domain data network gateway PGW can the delete target network side information of carrying that can not create or retain.

The processing method of a kind of carrying that the embodiment of the present invention provides, the method includes:

Source network side shifting managed network element knows the information of the carrying that target network side can not create or retain；

Described source network side shifting managed network element trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

The processing method of the another kind of carrying that the embodiment of the present invention provides, the method includes:

Source network side gateway receives the triggering instruction that source network side shifting managed network element sends, described trigger instruction be described source network side shifting managed network element know the carrying that target network side can not create or retain information after send；

Source network side gateway triggers instruction according to described, the second deletion conversation request message is sent to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

A kind of mobile management net element that the embodiment of the present invention provides, including:

Know unit, for knowing the information of carrying that target network side can not create or retain；

Transmitting element, for after the described information knowing carrying that unit knows that target network side can not create or retain, trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

A kind of gateway that the embodiment of the present invention provides, including:

Receive unit, for receiving the triggering instruction that source network side shifting managed network element sends, described trigger instruction be source network side shifting managed network element know the carrying that target network side can not create or retain information after send；

Transmitting element, for the triggering instruction received according to described reception unit, the second deletion conversation request message is sent to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

The process system of a kind of carrying that the embodiment of the present invention provides, including: source network side shifting managed network element, source network side gateway, block domain data network gateway, wherein,

Described source network side shifting managed network element, for after knowing the information of carrying that target network side can not create or retain, trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway；

Described source network side gateway, for receiving the triggering instruction that source network side shifting managed network element sends, and trigger instruction according to described, sending the second deletion conversation request message to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain；

Block domain data network gateway, for after receiving the second deletion conversation request message that source network side gateway sends, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain.

The processing method of a kind of carrying that the embodiment of the present invention provides and system, and mobile management net element and gateway, when being moved management process, source network side shifting managed network element can know the information of the carrying that target network side can not create or retain, and trigger the information of the carrying that PGW delete target network side can not create or retain, make PGW no longer retains the carrying information of redundancy, save network side load context resource.

Accompanying drawing explanation

Fig. 1 is current wireless evolution network framework figure；

Fig. 2 be UE trigger TAU flow process realize process schematic；

The processing method of a kind of carrying that Fig. 3 provides for the embodiment of the present invention one；

The processing method of a kind of carrying that Fig. 4 provides for the embodiment of the present invention two；

The processing method of a kind of carrying that Fig. 5 provides for the embodiment of the present invention three；

The processing method of a kind of carrying that Fig. 6 provides for the embodiment of the present invention four；

The flowchart of the embodiment of the method five that Fig. 7 provides for the embodiment of the present invention；

The flowchart of the embodiment of the method six that Fig. 8 provides for the embodiment of the present invention；

The flowchart of the embodiment of the method seven that Fig. 9 provides for the embodiment of the present invention；

The flowchart of the embodiment of the method eight that Figure 10 provides for the embodiment of the present invention；

The flowchart of the embodiment of the method nine that Figure 11 provides for the embodiment of the present invention；

The flowchart of the embodiment of the method ten that Figure 12 provides for the embodiment of the present invention；

A kind of mobile management net element that Figure 13 provides for the embodiment of the present invention；

The another kind of mobile management net element that Figure 14 provides for the embodiment of the present invention；

A kind of gateway that Figure 15 provides for the embodiment of the present invention；

The process system of a kind of carrying that Figure 16 provides for the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.

As it is shown on figure 3, the processing method of a kind of carrying provided for the embodiment of the present invention one, the method includes:

S301: source network side shifting managed network element knows the information of the carrying that target network side can not create or retain.

Wherein, described source network side shifting managed network element one of can adopt following two mode any to know the information of the carrying that target network side can not create or retain:

Mode one, notified by target network side: described source network side shifting managed network element receives the notification message that target network side mobile management net element sends, know the information of carrying that target network side can not create or retain according to described notification message, its more specifically the following embodiment of implementation will be described in.

Mode two, source network side shifting managed network element is determined self: described source network side shifting managed network element creates or retain the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side, described target network side creates or retains the bearer context information that the foundation information carried includes one of following information or its combination in any: UE, EPS loaded state cell, whether the local policy of target network side and target network side are supported to create LIPA (LocalIPAccess, local IP accesses) PDN (PacketDataNetwork, packet data network) information that connects；Wherein, when in mobile management flow process, mobile management net element does not change, namely when source network side shifting managed network element and target network side mobile management net element are same mobile management net element, whether the bearer context information of described UE, the local policy of target network side and target network side support that creating the LIPAPDN information connected is that described source network side shifting managed network element self preserves, and described EPS loaded state cell is that UE sends；nullWhen in mobile management flow process, mobile management net element changes，Namely when source network side shifting managed network element and target network side mobile management net element are different mobile management net elements，The bearer context information of described UE is that described source network side shifting managed network element self preserves，Described EPS loaded state cell is that described UE is sent to described target network side mobile management net element and is transmitted to described source network side shifting managed network element by described target network side mobile management net element，Whether the local policy of described target network side and target network side support that creating the LIPAPDN information connected is that described target network side mobile management net element is transmitted to described source network side shifting managed network element，It should be noted that，When triggering switching flow，Described target network side creates or retains the foundation information carried and do not include EPS loaded state cell.

S302: described source network side shifting managed network element trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

Wherein, described second deletes conversation request message can carry operation mark (OperationIndication, abbreviation: first OI) is deleted conversation request message and realize by described source network side shifting managed network element to what described source network side gateway SGW sent.Described source network side gateway SGW according to described operation mark, triggers and sends the second deletion conversation request message to block domain data network gateway PGW, and one of them specific embodiment is that described operation mark is set to particular value, for instance 1；Further, if described first deletes conversation request message and be not provided with operation mark or when operation mark is set to nonspecific value, described source network side SGW will not send second to described PGW delete conversation request message.

Wherein, described first deletes conversation request message carries the information of the carrying that described target network side can not create or retain, described source network side SGW deletes conversation request message according to receive first, the second deletion conversation request message is sent to PGW, after PGW receives the second deletion conversation request message, delete the information of the carrying that described target network side can not create or retain.

The processing method of a kind of carrying that the embodiment of the present invention provides, when being moved management process, source network side shifting managed network element can know the information of the carrying that target network side can not create or retain, and the information of the carrying that source network side triggering PGW delete target network side can not create or retain can be passed through, make PGW no longer retains the carrying information of redundancy, save the bearer context resource of network side.

As shown in Figure 4, for the processing method of a kind of carrying that the embodiment of the present invention two provides, the method includes:

S401: target network side mobile management net element determines the information of the carrying that target network side can not create or retain.

Wherein, described target network side mobile management net element creates or retains the information of the carrying that foundation the information of carrying determines that target network side can not create or retain according to target network side, and described target network side creates or retains foundation the information of carrying and includes one of following information or its combination in any: whether the bearer context information of subscriber equipment, EPS loaded state cell, the local policy of target network side and target network side support the information of establishment LIPAPDN connection.If mobile management net element does not change, namely target network side mobile management net element and source network side shifting managed network element are same mobile management net element, whether the bearer context information of subscriber equipment, the local policy of target network side and target network side that the acquisition of described target network side mobile management net element preserves self are supported to create the LIPAPDN information connected, and obtain the EPS loaded state cell of subscriber equipment transmission；If mobile management net element changes, namely target network side mobile management net element and source network side shifting managed network element are different mobile management net elements, whether the local policy of the target network side that the acquisition of described target network side mobile management net element preserves self and target network side support to create the LIPAPDN information connected and the EPS loaded state cell that the bearer context information of the subscriber equipment of acquisition source network side shifting managed network element transmission and subscriber equipment send.

S402: described target network side mobile management net element sends a notification message to source network side shifting managed network element.

Except the information by notification message make source network side shifting managed network element know carrying that target network side can not create or retain, the embodiment of the present invention also provides for the processing method of another kind of carrying, as shown in Figure 5, target network side mobile management net element can also send, to source network side shifting managed network element, the foundation information that target network side creates or retains carrying, described source network side shifting managed network element creates or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to described target network side, specifically, the method includes:

S501: target network side mobile management net element determines that target network side creates or retains the foundation information of carrying；

S502: described target network side mobile management net element sends, to source network side shifting managed network element, foundation the information that described target network side creates or retains carrying, indicates the information of the carrying that source network side shifting managed network element determines that target network side can not create or retain.

The processing method of the carrying that both examples above provides, when being moved management process, by sending a notification message to source network side shifting managed network element or target network side creates or retains the foundation information of carrying so that source network side shifting managed network element can know the information of the carrying that target network side can not create or retain.

As shown in Figure 6, for the processing method of a kind of carrying that the embodiment of the present invention four provides, the method includes:

S601: source network side gateway receives the triggering instruction that source network side shifting managed network element sends, described trigger instruction be described source network side shifting managed network element know the carrying that target network side can not create or retain information after send.

Wherein, described source network side gateway receives the triggering instruction of source network side shifting managed network element transmission and includes: what source network side shifting managed network element sent carries the first deletion conversation request message of operation mark, wherein, this operation mark is set to particular value, for instance 1.

S602: described source network side gateway triggers instruction according to described, the second deletion conversation request message is sent to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

Wherein, described source network side gateway judges that described triggering indicates whether to carry the operation mark being set to particular value, if it is, send the second deletion conversation request message to block domain data network gateway.

After described block domain data network gateway deletes conversation request message receive the gateway transmission of source network side second, the information of the carrying that delete target network side can not create or retain.

The processing method of a kind of carrying that the embodiment of the present invention provides, when being moved management process, the triggering instruction that source network side SGW sends according to source network side shifting managed network element, trigger the information of the carrying that PGW delete target network side can not create or retain, make PGW no longer retains the carrying information of redundancy, save the bearer context resource of network side.

The embodiment of the present invention is applicable to all of radio access network types and all of mobile management flow type.For making those of ordinary skill in the art understand technical scheme clearly and completely, illustrate for TAU flow process and Handover flow process individually below.

As shown in Figure 7, flowchart for the embodiment of the method five that the embodiment of the present invention provides, the application scenarios that when this embodiment is for generation TAU flow process, MME and SGW changes simultaneously, namely target network side MME and source network side MME is not same MME, target network side SGW and source network side SGW is not the application scenarios of same SGW, and this embodiment includes:

S701:UE sends tracking area position updating request (TAURequest) message to target network side MME；

Described TAURequest message comprises GUTI (GloballyUniqueTemporaryIdentity, globally unique temporary mark) identify and EPS loaded state (EPSbearerstatus) cell, GUTI mark is for positioning source network side MME, and EPS loaded state cell is for describing the EPS bearer context state of activation information in UE；

Wherein, EPSbearerstatus cell is with 16 EBI (EPSBearerIdentity, EPS carries mark) mark bearer context state of activation is described, each EBI accounts for a bit, wherein, EBI (0)-EBI (4) is set to " 0 ", with standby, with " 0 ", EBI (5)-EBI (15) represents that corresponding EPS bearer context is deexcitation, represent that corresponding EPS bearer context is to activate with " 1 "；

S702: target network side MME to source network side MME sends context request (ContextRequest) message；

S703: source network side MME, after receiving the target network side MME ContextRequest message sent, sends context response (ContextResponse) message to target network side MME；

nullWherein，Described ContextResponse message comprises the bearer context information of UE，The bearer context information of described UE is described by EPSPDNConnections cell，Specifically include and connect relevant bearer context (BearerContext) cell to PDN、Default bearer mark (LinkedEPSBearerID) and Access Point Name (AccessPointName，APN) it is called for short: the information such as，Described bearer context cell comprises carrying mark (EPSBearerID)、Bearer quality of service (BearerLevelQoS)、Gateway user name IP address and tunnel breakpoint mark (TunnelEndpointIdentifier，TEID) it is called for short: the information such as；Wherein, the mark of the default bearer (DefaultBearer) that each PDN connects through its correspondence uniquely identifies, the context that each PDN connects comprises this PDN and connects all of bearer context, specifically, comprise a bearer context corresponding to default bearer, and zero to bearer context corresponding to multiple dedicated bearings, wherein each bearer context uniquely identifies by carrying mark；

S704: the target network side MME information determining the carrying that target network side can not create or retain；

Wherein, described target network side MME creates or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side, and target network side can not create or retain the situation of carrying can be divided into following several ways:

(1) described target network side MME according to it from the UE EPS loaded state cell known and inconsistent from the bearer context information of the source network side MME UE known, determine the information of the carrying that target network side can not create or retain, wherein, inconsistent situation is: the carrying not one_to_one corresponding that the carrying activated from the instruction of the UE EPS loaded state cell obtained and source network side MME pass over；Such as, EPS loaded state cell instruction default bearer 5 exists, and comprises default bearer 5 and the context of default bearer 6, now in the bearer context that source network side MME passes over, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

(2) described target network side MME determines the information of carrying that target network side can not create or retain according to local policy, wherein said local policy can comprise access PDN and connect quantity and/or bearer context quantity control strategy, now target network side MME is likely to be due to above-mentioned control strategy, it is not able to successfully create all carryings of UE, causes that part is carried on target network side and can not create or retain；Such as, the bearer context of source network side MME transmission contains default bearer 5 and the context of default bearer 6, but target network side MME has been reached the upper limit of license creation bearer context number by the bearer context number created thereon, default bearer 5 can only be created, now, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

(3) when creating the LIPAPDN UE connected in source network side and being moved, target network side MME judges that the LIPAPDN of described establishment is connected to target network side and can not retain；Such as, the bearer context information of source network side MME transmission contains default bearer 5 and the context of default bearer 6, wherein, default bearer 6 connects for LIPAPDN, and default bearer 5 is that conventional PDN connects, source network side HeNB (HomeEvolvedNodeB, home evolved node B) and target network side HeNB not in same local home base station network, now, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

S705: target network side MME sends a notification message to source network side MME, and in the present embodiment, described notification message can adopt context response (ContextAck) message；

Wherein, described ContextAck message can explicit (directly) instruction target network side information of carrying that can not create or retain, can also implicit expression (indirectly) the instruction target network side information of carrying that can not create or retain, its specific implementation can realize in the following manner one or a combination set of:

(1) ContextAck message carries default bearer mark (LinkedEPSBearerID) or Access Point Name (AccessPointName, it is called for short: APN) information, wherein, this default bearer mark or Access Point Name can correspond directly to the mark of the carrying that target network side can not create or retain, such as described default bearer mark or Access Point Name may be embodied in context to be deleted " Contexttoberemoved " cell, directly the mark of the carrying that instruction target network side can not create or retain；Or, the mark of the carrying that this default bearer mark or Access Point Name can create corresponding to target network side or retain, the information of the carrying that implicit expression instruction target network side can not create or retain, the information of the carrying that source network side MME can be created by bearer context information and the described target network side known of locally stored subscriber equipment or retain, knows the information of the carrying that remaining target network side can not create or retain；Or,

(2) ContextAck message carries EPSbearerstatus cell, the different values (such as 1 or 0) in bit corresponding in this EPSbearerstatus cell specify carrying that target network side can create or retain and the carrying that target network side can not create or retain respectively, and source network side MME knows the information of carrying that target network side can not create or retain according to described EPSbearerstatus cell；Or,

(3) ContextAck message is carried LIPAPDN connection and is not supported that (LIPAPDNConnectionNotSupportIndication is called for short: LPCNSI), can not create or retain to indicate described LIPAPDN to be connected to target network side mark；

Additionally, ContextAck message also carries gateway change mark, (SGWChangeIndication, is called for short: SGWCI) mark, to indicate this TAU flow process to have selected new SGW；

S706: target network side MME to target network side SGW sends establishment conversation request (CreateSessionRequest) message；

Described CreateSessionRequest message carries the default bearer mark of the carrying that target network side can create or retain, additionally, triggering is performed step S707 by this step S706；

Wherein, this step is PDN granularity, can create in target network side if multiple PDN connect (carrying) or retain, then correspondingly trigger a plurality of CreateSessionRequest message, the PDN connection that every CreateSessionRequest message correspondence is relevant, the PDN connection that can not create for target network side or retain will not trigger this step；

S707: target network side SGW to PGW sends amendment carrying request (ModifyBearerRequest) message；

Wherein, this step is PDN granularity；

S708: target network side SGW receives the PGW amendment sent carrying response (ModifBearerResponse) message；

S709: target network side MME receives target network side SGW establishment conversational response (CreateSessionResponse) message sent；

S710: source network side MME according to the target network side MME that receives in the abovementioned steps S705 ContextAck message sent, and knows the information of the carrying that target network side can not create or retain；

It should be noted that at this, this step S710 can occur before step S706, occur afterwards or simultaneously, and it is absent from sequencing, after receiving the target network side MME ContextAck message sent, source network side MME can perform this step；

S711: source network side MME to source network side SGW sends the first deletion conversation request (DeleteSessionRequest) message；

The carrying that target network side can not be created or retains, the the first deletion conversation request message carrying operation mark OI can be sent by trigger source network side MME to source network side SGW, in concrete a kind of embodiment therein, this OI mark is set to 1, and described OI mark sends the second deletion conversation request message in order to indicate source network side SGW to PGW；

Wherein, this step is PDN granularity, if having a plurality of PDN to be connected to target network side to create or retain, then correspondingly trigger a plurality of first and delete conversation request message, delete the relevant PDN of conversation request message correspondence for every first to connect, delete conversation request message for every first and all carry default bearer mark；

S712: source network side SGW sends the second deletion conversation request (DeleteSessionRequest) message according to the first deletion conversation request message carrying operation mark received to PGW；

Wherein, described second deletion conversation request message carries the information of the carrying that target network side can not create or retain；

After S713:PGW receives source network side SGW the second deletion conversation request message sent, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain, afterwards, the second deletion conversational response (DeleteSessionResponse) message is sent to source network side SGW；

S714: source network side MME receives source network side SGW the first deletion conversational response (DeleteSessionResponse) message sent；

S715: source network side MME to source network side SGW sends the 3rd deletion conversation request (DeleteSessionRequest) message；

After having deleted the information of the carrying that described target network side can not create or retain, source network side MME will initiate the deletion flow process of the residue bearer context of UE in the SGW of source network side；

Wherein, this step is UE granularity, now described 3rd deletion conversation request message carries scope identifier (ScopeIndication, it is called for short SI mark), and this SI mark is set to 1, instruction source network side SGW discharges all PDN of UE and connects context, and now OI mark is set to 0 so that source network side SGW need not send to PGW and delete conversation request message；

S716: source network side MME receives source network side SGW the 3rd deletion conversational response (DeleteSessionResponse) message sent.

In the present embodiment, except the information being known carrying that target network side can not create or retain by notification message, source network side MME can also pass through to receive the target network side MME target network side sent and creates or retain the foundation information of carrying, it is determined that the information of the carrying that target network side can not create or retain.Specifically, whether EPS loaded state cell, the local policy of target network side and target network side support that creating the LIPAPDN information connected can be transmitted to source network side MME by context response message, after source network side MME receives the context response message carrying the foundation information that target network side creates or reservation carries, it is determined that the information of the carrying that target network side can not create or retain.

nullThe embodiment of the method five that the embodiment of the present invention provides，When there is tracking area position update flow，Source network side gateway is indicated to send the second deletion conversation request message to PGW by source network side MME，The information of the carrying that PGW delete target network side can not create or retain can be triggered，Make PGW no longer retains the carrying information of redundancy，Save network side load context resource，Additionally，Source network side MME can pass through notification message or target network side creates or retains the foundation information of carrying，Know the information of the carrying that target network side can not create or retain，The mode of the information of source network side MME is known carrying that target network side can not create or retain is more flexible，Secondly，It is classified deleting conversation request operation，The carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain，The carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side，Enhance source network side and delete the operability of bearer context information and the motility of its UE created.

As shown in Figure 8, flowchart for the embodiment of the method six that the embodiment of the present invention provides, when this embodiment is for generation TAU flow process, MME does not change, the application scenarios that SGW changes, namely target network side MME and source network side MME is same MME, target network side SGW and source network side SGW is not the application scenarios of same SGW, and this embodiment includes:

S801:UE sends the TAURequest message carrying EPS loaded state cell to MME；

S802:MME determines the information of the carrying that target network side can not create or retain；

Wherein, described MME creates or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side, and target network side can not create or retain the situation of carrying can be divided into following several ways:

(1) MME is inconsistent from the bearer context information of the UE EPS loaded state cell known and the UE of self preservation according to it, determine the information of the carrying that target network side can not create or retain, wherein, inconsistent situation is: the carrying activated from the instruction of the UE EPS loaded state cell obtained and the carrying not one_to_one corresponding self preserved；Such as, EPS loaded state cell instruction default bearer 5 exists, and comprises default bearer 5 and the context of default bearer 6 in the bearer context of the UE that self preserves, and now, MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

(2) when creating the LIPAPDN UE connected in source network side and being moved, MME judges that the LIPAPDN of described establishment is connected to target network side and can not retain；Such as, the bearer context information of the UE that MME self preserves contains default bearer 5 and the context of default bearer 6, wherein, default bearer 6 connects for LIPAPDN, default bearer 5 is that conventional PDN connects, and source network side HeNB and target network side HeNB is not in same local home base station network, now, MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

In the present embodiment, MME can also determine the information of carrying that target network side can not create or retain according to local policy, and wherein said local policy can comprise access PDN and connect quantity and/or bearer context quantity control strategy；

S803:MME sends CreateSessionRequest message to target network side SGW；

Described CreateSessionRequest message carries the default bearer mark of the carrying that target network side can create or retain, additionally, triggering is performed step S804 by this step S803；

S804: target network side SGW to PGW sends ModiodBearerRequest message；

Wherein, this step is PDN granularity；

S805: target network side SGW receives the PGW ModiodBearerResponse message sent；

S806:MME receives the target network side SGW CreateSessionResponse message sent；

S807:MME sends the first deletion conversation request message to source network side SGW；

The carrying that target network side can not be created or retains, MME can be triggered and send the first deletion conversation request message carrying operation mark OI to source network side SGW, in concrete a kind of embodiment therein, this OI mark is set to 1, and described OI mark sends the second deletion conversation request message in order to indicate source network side SGW to PGW；

S808: source network side SGW sends the second deletion conversation request message according to the first deletion conversation request message carrying operation mark received to PGW；

After S809:PGW receives source network side SGW the second deletion conversation request message sent, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain, afterwards, the second deletion conversational response message is sent to source network side SGW；

S810:MME receives source network side SGW the first deletion conversational response message sent；

S811:MME sends the 3rd deletion conversation request message to source network side SGW；

After having deleted the information of the carrying that described target network side can not create or retain, MME will initiate the deletion flow process of the residue bearer context of UE in the SGW of source network side；

Wherein, this step is UE granularity, now described 3rd deletion conversation request message carries SI mark, and this SI mark is set to 1, instruction source network side SGW discharges all PDN of UE and connects context, and now OI mark is set to 0 so that source network side SGW need not send to PGW and delete conversation request message；

S812:MME receives source network side SGW the 3rd deletion conversational response message sent.

nullThe embodiment of the method six that the embodiment of the present invention provides，When there is tracking area position update flow，By indicating source network side gateway to send the second deletion conversation request message to PGW，The information of the carrying that PGW delete target network side can not create or retain can be triggered，Make PGW no longer retains the carrying information of redundancy，Save network side load context resource，Additionally，Source network side MME and target network side MME is same MME，Decrease the communication-cost between network element，Secondly，It is classified deleting conversation request operation，The carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain，The carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side，Enhance source network side and delete the operability of bearer context information and the motility of its UE created.

As shown in Figure 9, flowchart for the embodiment of the method seven that the embodiment of the present invention provides, when this embodiment is for generation TAU flow process, MME changes, the application scenarios that SGW does not change, namely target network side MME and source network side MME is not same MME, target network side SGW and source network side SGW is the application scenarios of same SGW, and this embodiment includes:

S901:UE sends the TAURequest message carrying EPS loaded state cell to target network side MME；

S902: target network side MME to source network side MME sends ContextRequest message；

S903: source network side MME, after receiving the target network side MME ContextRequest message sent, sends ContextResponse message to target network side MME；

Wherein, described ContextResponse message comprises the bearer context information of UE, and the bearer context information of described UE is described by EPSPDNConnections cell；

S904: the target network side MME information determining the carrying that target network side can not create or retain；

(2) described target network side MME determines the information of carrying that target network side can not create or retain according to local policy, wherein said local policy can comprise access PDN and connect quantity and/or bearer context quantity control strategy, now target network side MME is likely to be due to above-mentioned control strategy, it is not able to successfully create all carryings of UE, causes that part carrying can not create in target network side or retain；Such as, the bearer context of source network side MME transmission contains default bearer 5 and the context of default bearer 6, but target network side MME has been reached the upper limit of license creation bearer context number by the bearer context number created thereon, default bearer 5 can only be created, now, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

(3) when creating the LIPAPDN UE connected in source network side and being moved, target network side MME judges that the LIPAPDN of described establishment is connected to target network side and can not retain；Such as, the bearer context information of source network side MME transmission contains default bearer 5 and the context of default bearer 6, wherein, default bearer 6 connects for LIPAPDN, default bearer 5 is that conventional PDN connects, and source network side HeNB target network side HeNB is not in same local home base station network, now, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

S905: target network side MME sends a notification message to source network side MME, and in the present embodiment, described notification message can adopt ContextAck message；

(1) ContextAck message carries default bearer mark or Access Point Name information, wherein, this default bearer mark or Access Point Name can correspond directly to the mark of the carrying that target network side can not create or retain, such as described default bearer mark or Access Point Name may be embodied in context to be deleted " Contexttoberemoved " cell, directly the mark of the carrying that instruction target network side can not create or retain；Or, the mark of the carrying that this default bearer mark or Access Point Name can create corresponding to target network side or retain, the information of the carrying that implicit expression instruction target network side can not create or retain, the information of the carrying that source network side MME can be created by bearer context information and the described target network side known of locally stored subscriber equipment or retain, knows the information of the carrying that remaining target network side can not create or retain；Or,

(3) ContextAck message takes LPCNSI mark, can not create or retain to indicate described LIPAPDN to be connected to target network side；

Additionally, ContextAck message will not carry SGWCI mark, to indicate the SGW in this TAU flow process not change；

S906: target network side MME to SGW sends ModifyBearerRequest message；

Described ModifyBearerRequest message carries the default bearer mark of the carrying that target network side can create or retain, additionally, triggering is performed step S907 by this step S906；

Wherein, this step is PDN granularity, can create in target network side if multiple PDN connect (carrying) or retain, then correspondingly trigger a plurality of ModifyBearerRequest message, the PDN connection that every ModifyBearerRequest message correspondence is relevant, the PDN connection that can not create for target network side or retain will not trigger this step；

S907:SGW sends ModifyBearerRequest message to PGW；

Wherein, described SGW is realized to the described SGW amendment bearing request message sent to the PGW amendment bearing request message sent by target network side MME；

S908:SGW receives the PGW ModifyBearerResponse message sent；

S909: target network side MME receives the SGW ModifyBearerResponse message sent；

S910: source network side MME according to the target network side MME that receives in the abovementioned steps S905 ContextAck message sent, and knows the information of the carrying that target network side can not create or retain；

It should be noted that at this, this step S910 can occur before step S906, occur afterwards or simultaneously, and it is absent from sequencing, after receiving the target network side MME ContextAck message sent, source network side MME can perform this step；

S911: source network side MME to SGW sends the first deletion conversation request message；

The carrying that target network side can not be created or retains, the the first deletion conversation request message carrying operation mark OI can be sent by trigger source network side MME to SGW, in concrete a kind of embodiment therein, this OI mark is set to 1, and described OI mark sends the second deletion conversation request message in order to indicate SGW to PGW；

S912:SGW sends the second deletion conversation request message according to the first deletion conversation request message carrying operation mark received to PGW；

After S913:PGW receives SGW the second deletion conversation request message sent, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain, afterwards, the second deletion conversational response message is sent to SGW；

S914: source network side MME receives SGW the first deletion conversational response message sent.

nullThe embodiment of the method seven that the embodiment of the present invention provides，When there is tracking area position update flow，The second deletion conversation request message is sent to PGW by source network side MME indicating service gateway，The information of the carrying that PGW delete target network side can not create or retain can be triggered，Make PGW no longer retains the carrying information of redundancy，Save network side load context resource，Additionally，Source network side MME can pass through notification message or target network side creates or retains the foundation information of carrying，Know the information of the carrying that target network side can not create or retain，The mode of the information of source network side MME is known carrying that target network side can not create or retain is more flexible，Secondly，It is classified deleting conversation request operation，The carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain，The carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side，Enhance source network side and delete the operability of bearer context information and the motility of its UE created.

As shown in Figure 10, for the flowchart of the embodiment of the method eight that the embodiment of the present invention provides, the application scenarios that when this embodiment is for generation Handover flow process, MME and SGW changes simultaneously, this embodiment includes:

S1001: source network side HeNB triggers Handover flow process；

S1002: source network side HeNB to source network side MME sends switching requires (HandoverRequired) message；

After S1003: the source network side MME HandoverRequired message receiving source network side HeNB transmission, send to target network side MME to forward to redirect and ask (ForwardRelocationRequest) message；

Wherein, described ForwardRelocationRequest message comprises the bearer context information of UE, and the bearer context information of described UE is described by EPSPDNConnections cell；

S1004: the target network side MME information determining the carrying that target network side can not create or retain；

(1) described target network side MME determines the information of carrying that target network side can not create or retain according to local policy, wherein said local policy can comprise access PDN and connect quantity and/or bearer context quantity control strategy, now target network side MME is likely to be due to above-mentioned control strategy, it is not able to successfully create all carryings of UE, causes that part is carried on target network side and can not create or retain；Such as, the bearer context of source network side MME transmission contains default bearer 5 and the context of default bearer 6, but target network side MME has been reached the upper limit of license creation bearer context number by the bearer context number created thereon, default bearer 5 can only be created, now, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

(2) when creating the LIPAPDN UE connected in source network side and being moved, target network side MME judges that the LIPAPDN of described establishment is connected to target network side and can not retain；Such as, the bearer context information of source network side MME transmission contains default bearer 5 and the context of default bearer 6, wherein, default bearer 6 connects for LIPAPDN, default bearer 5 is that conventional PDN connects, and source network side HeNB and target network side HeNB is not in same local home base station network, now, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

S1005: target network side MME to source network side MME sends announcement information, and in the present embodiment, described announcement information can adopt forwarding to redirect response (ForwardRelocationResponse) message；

Wherein, described ForwardRelocationResponse message can explicit (directly) instruction target network side information of carrying that can not create or retain, can also implicit expression (indirectly) the instruction target network side information of carrying that can not create or retain, its specific implementation can realize in the following manner one or a combination set of:

(1) ForwardRelocationResponse message carries default bearer mark or Access Point Name information, wherein, this default bearer mark or Access Point Name can correspond directly to the mark of the carrying that target network side can not create or retain, such as described default bearer mark or Access Point Name may be embodied in context to be deleted " Contexttoberemoved " cell, directly the mark of the carrying that instruction target network side can not create or retain；Or, the mark of the carrying that this default bearer mark or Access Point Name can create corresponding to target network side or retain, the information of the carrying that implicit expression instruction target network side can not create or retain, the information of the carrying that source network side MME can be created by bearer context information and the described target network side known of locally stored subscriber equipment or retain, knows the information of the carrying that remaining target network side can not create or retain；Or,

(2) ForwardRelocationResponse message carries EPSbearerstatus cell, the different values (such as 1 or 0) in bit corresponding in this EPSbearerstatus cell specify carrying that target network side can create or retain and the carrying that target network side can not create or retain respectively, and source network side MME knows the information of carrying that target network side can not create or retain according to described EPS loaded state cell；Or,

(3) ForwardRelocationResponse message carries LPCNSI mark, to indicate the LIPAPDN that target network side can not create or retain to connect；

Additionally, ForwardRelocationResponse message also carries SGWCI mark, in order to indicate this Handover flow process to have selected new SGW；

S1006: target network side MME to target network side SGW sends establishment conversation request (CreateSessionRequest) message；

Described CreateSessionRequest message carries the default bearer mark of the carrying that target network side can create or retain, with embodiment of the method five and embodiment of the method six the difference is that, this step S1006 will not send ModifyBearerRequest message to PGW by trigger target network side SGW, in the subsequent operation of this flow process, target network side MME can send ModifyBearerRequest message to target network side SGW, sends ModifyBearerRequest message with trigger target network side SGW to PGW；

S1007: target network side MME receives target network side SGW establishment conversational response (CreateSessionResponse) message sent；

S1008: source network side MME redirects response message according to the target network side MME that receives in the abovementioned steps S1005 forwarding sent, and knows the information of the carrying that target network side can not create or retain；

It should be noted that at this, this step S1008 can occur before step S1006, occur afterwards or simultaneously, and it is absent from sequencing, after receiving the target network side MME forwarding sent redirection response message, source network side MME can perform this step；

S1009: source network side MME to source network side SGW sends the first deletion conversation request (DeleteSessionRequest) message；

S1010: source network side SGW sends the second deletion conversation request (DeleteSessionRequest) message according to the first deletion conversation request message carrying operation mark received to PGW；

After S1011:PGW receives source network side SGW the second deletion conversation request message sent, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain, afterwards, the second deletion conversational response (DeleteSessionResponse) message is sent to source network side SGW；

S1012: source network side MME receives source network side SGW the first deletion conversational response (DeleteSessionResponse) message sent；

S1013: source network side MME to source network side SGW sends the 3rd deletion conversation request (DeleteSessionRequest) message；

S1014: source network side MME receives source network side SGW the 3rd deletion conversational response (DeleteSessionResponse) message sent.

In the present embodiment, except the information being known carrying that target network side can not create or retain by notification message, source network side MME can also pass through to receive the target network side MME target network side sent and creates or retain the foundation information of carrying, it is determined that the information of the carrying that target network side can not create or retain.Specifically, whether the local policy of target network side and target network side support to create the LIPAPDN information connected can by forwarding redirection response message to be transmitted to source network side MME, after source network side MME receives the forwarding redirection response message carrying the foundation information that target network side creates or reservation carries, it is determined that the information of the carrying that target network side can not create or retain.

nullThe embodiment of the method eight that the embodiment of the present invention provides，When switching flow process，Source network side gateway is indicated to send the second deletion conversation request message to PGW by source network side MME，The information of the carrying that PGW delete target network side can not create or retain can be triggered，Make PGW no longer retains the carrying information of redundancy，Save network side load context resource，Additionally，Source network side MME can pass through notification message or target network side creates or retains the foundation information of carrying，Know the information of the carrying that target network side can not create or retain，The mode of the information of source network side MME is known carrying that target network side can not create or retain is more flexible，Secondly，It is classified deleting conversation request operation，The carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain，The carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side，Enhance source network side and delete the operability of bearer context information and the motility of its UE created.

As shown in figure 11, for the flowchart of the embodiment of the method nine that the embodiment of the present invention provides, when this embodiment is for generation Handover flow process, MME does not change, the application scenarios that SGW changes, and this embodiment includes:

S1101: source network side HeNB triggers Handover flow process；

S1102: source network side HeNB to MME sends HandoverRequired message；

S1103:MME determines the information of the carrying that target network side can not create or retain；

Wherein, described MME creates or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side, and target network side can not create or retain the situation of carrying and include:

When creating the LIPAPDN UE connected in source network side and being moved, MME judges that the LIPAPDN of described establishment is connected to target network side and can not retain；Such as, the bearer context information of the UE that MME self preserves contains default bearer 5 and the context of default bearer 6, wherein, default bearer 6 connects for LIPAPDN, default bearer 5 is that conventional PDN connects, and source network side HeNB and target network side HeNB is not in same local home base station network, now, MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

S1104:MME sends CreateSessionRequest message to target network side SGW；

Described CreateSessionRequest message carries the default bearer mark of the carrying that target network side can create or retain, and this step S1104 will not send ModifyBearerRequest message to PGW by trigger target network side SGW, in the subsequent operation of this flow process, MME can send ModfyBearerRequest message to target network side SGW, sends ModifyBearerRequest message with trigger target network side SGW to PGW；

Wherein, can create in target network side if multiple PDN connect (carrying) or retain, then correspondingly trigger a plurality of CreateSessionRequest message, the PDN connection that every CreateSessionRequest message correspondence is relevant, the PDN connection that can not create for target network side or retain will not trigger this step；

S1105:MME receives the target network side SGW CreateSessionResponse message sent；

S1106:MME sends the first deletion conversation request message to source network side SGW；

The carrying that target network side can not be created or be retained, can trigger MME and send the first deletion conversation request message carrying operation mark OI to source network side SGW, and in concrete a kind of embodiment therein, this OI mark is set to 1；

S1107: source network side SGW sends the second deletion conversation request message according to the first deletion conversation request message carrying operation mark received to PGW；

Wherein, described second deletion conversation request message carries the information of the carrying that described target network side can not create or retain；

After S1108:PGW receives source network side SGW the second deletion conversation request message sent, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain, afterwards, the second deletion conversational response message is sent to source network side SGW；

S1109:MME receives source network side SGW the first deletion conversational response message sent；

S1110:MME sends the 3rd deletion conversation request message to source network side SGW；

S1111:MME receives source network side SGW the 3rd deletion conversational response message sent.

nullThe embodiment of the method nine that the embodiment of the present invention provides，When switching flow process，By indicating source network side gateway to send the second deletion conversation request message to PGW，The information of the carrying that PGW delete target network side can not create or retain can be triggered，Make PGW no longer retains the carrying information of redundancy，Save network side load context resource，Additionally，Source network side MME and target network side MME is same MME，Decrease the communication-cost between network element，Secondly，It is classified deleting conversation request operation，The carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain，The carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side，Enhance source network side and delete the operability of bearer context information and the motility of its UE created.

As shown in figure 12, for the flowchart of the embodiment of the method ten that the embodiment of the present invention provides, when this embodiment is for generation Handover flow process, MME changes, the application scenarios that SGW does not change, and this embodiment includes:

S1201: source network side HeNB triggers Handover flow process；

S1202: source network side HeNB to source network side MME sends HandoverRequired message；

After S1203: the source network side MME HandoverRequired message receiving source network side HeNB transmission, sending ForwardRelocationRequest message to target network side MME, described ForwardRelocationRequest message carries to describe the EPSPDNConnections cell of the bearer context information of UE；

S1204: the target network side MME information determining the carrying that target network side can not create or retain；

(1) described target network side MME determines the information of carrying that target network side can not create or retain according to local policy, wherein said local policy can comprise access PDN and connect quantity and/or bearer context quantity control strategy, now target network side MME is likely to be due to above-mentioned control strategy, it is not able to successfully create all carryings of UE, causes that part carrying can not create in target network side or retain；Such as, the bearer context of source network side MME transmission contains default bearer 5 and the context of default bearer 6, but target network side MME has been reached the upper limit of license creation bearer context number by the bearer context number created thereon, default bearer 5 can only be created, now, target network side MME, after judging, namely can determine that target network side can not create or retain default bearer 6；

S1205: target network side MME sends a notification message to source network side MME, and in the present embodiment, described notification message can adopt ForwardRelocationResponse message；

(2) ForwardRelocationResponse message carries EPSbearerstatus cell, the different values (such as 1 or 0) in bit corresponding in this EPSbearerstatus cell specify carrying that target network side can create or retain and the carrying that target network side can not create or retain respectively, and source network side MME knows the information of carrying that target network side can not create or retain according to described EPSbearerstatus cell；Or,

In the subsequent operation of this flow process, target network side MME can send ModifyBearerRequest message to SGW, to indicate SGW to send ModifyBearerRequest message to PGW；

Additionally, ForwardRelocationResponse message will not carry SGWCI mark, to indicate the SGW in this Handover flow process not change；

S1206: source network side MME according to the target network side MME that the receives ForwardRelocationResponse message sent, and knows the information of the carrying that target network side can not create or retain；

S1207: source network side MME to SGW sends the first deletion conversation request message；

S1208:SGW sends the second deletion conversation request message according to the first deletion conversation request message carrying operation mark received to PGW；

After S1209:PGW receives SGW the second deletion conversation request message sent, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain, afterwards, the second deletion conversational response message is sent to SGW；

S1210: source network side MME receives SGW the first deletion conversational response message sent.

nullThe embodiment of the method ten that the embodiment of the present invention provides，When switching flow process，The second deletion conversation request message is sent to PGW by source network side MME indicating service gateway，The information of the carrying that PGW delete target network side can not create or retain can be triggered，Make PGW no longer retains the carrying information of redundancy，Save network side load context resource，Additionally，Source network side MME can pass through notification message or target network side creates or retains the foundation information of carrying，Know the information of the carrying that target network side can not create or retain，The mode of the information of source network side MME is known carrying that target network side can not create or retain is more flexible，Secondly，It is classified deleting conversation request operation，The carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain，The carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side，Enhance source network side and delete the operability of bearer context information and the motility of its UE created.

As shown in figure 13, for the embodiment of the present invention provide a kind of mobile management net element, including:

Know unit 1301, for knowing the information of carrying that target network side can not create or retain；

Transmitting element 1302, for after the described information knowing carrying that unit 1301 knows that target network side can not create or retain, trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

Further, above-mentioned know that unit 1301 can adopt following two constituted mode to realize:

Constituted mode one: described in know that unit 1301 includes:

First receives unit, and for receiving the notification message that target network side mobile management net element sends, described notification message carries mark or the Access Point Name of the carrying that target network side can not create or retain；

First determines unit, for receiving after unit receives and carry the mark of carrying or the notification message of Access Point Name that target network side can not create or retain described first, directly know the information of carrying that described target network side can not create or retain according to described notification message；Or

Second receives unit, and for receiving the notification message that target network side mobile management net element sends, described notification message carries mark or the Access Point Name of the carrying that target network side can create or retain；

Second determines unit, for receiving after unit receives and carry the mark of carrying or the notification message of Access Point Name that target network side can create or retain described second, the mark of the carrying that bearer context information according to locally stored subscriber equipment and described target network side can create or retain or Access Point Name, it is determined that the information of the carrying that target network side can not create or retain；Or

3rd receives unit, for receiving the notification message that target network side mobile management net element sends, described notification message carries EPS loaded state cell, and described EPS loaded state cell specifies carrying that target network side can create or retain and the carrying that target network side can not create or retain respectively；

3rd determines unit, for receiving after unit receives the notification message carrying EPS loaded state cell the described 3rd, knows the information of carrying that target network side can not create or retain according to described EPS loaded state cell；Or

4th receives unit, and for receiving the notification message that target network side mobile management net element sends, described notification message carries LIPAPDN connection and do not support mark；

4th determines unit, for, after described 4th reception unit receives and carries the notification message that mark is not supported in LIPAPDN connection, connecting according to described LIPAPDN not support to identify and know that the LIPAPDN that target network side can not create or retain connects.

Constituted mode two: described in know that unit 1301 specifically for creating or retain the information of the carrying that foundation the information of carrying determines that target network side can not create or retain according to target network side, described target network side creates or retains foundation the information of carrying and includes one of following information or its combination in any: whether the bearer context information of subscriber equipment, EPS loaded state cell, the local policy of target network side and target network side support the information of establishment LIPAPDN connection；

Wherein, know described in that unit 1301 specifically includes:

Whether the 5th determines unit, consistent with EPS loaded state cell for the bearer context information according to described subscriber equipment, it is determined that the information of the carrying that target network side can not create or retain；Or

6th determines unit, for determining the information of carrying that target network side can not create or retain according to the local policy of described target network side, wherein, the local policy of described target network side comprises access PDN and connects quantity and/or bearer context quantity control strategy；Or

Whether the 7th determines unit, for supporting to create the LIPAPDN information connected according to described target network side, it is determined that the LIPAPDN that target network side can not create or retain connects.

Described transmitting element 1302 is specifically for after the described information knowing carrying that unit 1301 knows that target network side can not create or retain, the the first deletion conversation request message carrying operation mark is sent to source network side gateway, described first deletes conversation request message carries the information of the carrying that described target network side can not create or retain, and described operation mark trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway.

After described transmitting element 1302 is additionally operable to the information of carrying that can not create or retain at delete target network side, sending the 3rd deletion conversation request message to described source network side gateway, the described 3rd deletes conversation request message indicates described source network side gateway to delete the information of the carrying that the remaining target network side of subscriber equipment can create or retain.

The mobile management net element that the embodiment of the present invention provides, know that unit can create or retain the information of the carrying that the foundation information of carrying knows that target network side can not create or retain by notification message or target network side, make to know that the mode of the information of the carrying that target network side can not create or retain is more flexible, in addition, utilize transmitting element that the deletion conversation request operation to send is classified, the carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain, the carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side, enhance source network side and delete the operability of bearer context information and the motility of its UE created.

As shown in figure 14, for the embodiment of the present invention provide another kind of mobile management net element, including:

Determine unit 1401, for determining the information of carrying that target network side can not create or retain；

Transmitting element 1402, after determining the information of carrying that unit 1401 determines that target network side can not create or retain, sending a notification message to source network side shifting managed network element, instruction source network side shifting managed network element knows the information of the carrying that target network side can not create or retain.

Except the information by notification message make source network side shifting managed network element know carrying that target network side can not create or retain, the embodiment of the present invention also provides for a kind of mobile management net element, target network side mobile management net element is made to send, to source network side shifting managed network element, the foundation information that target network side creates or retains carrying, described source network side shifting managed network element creates or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to described target network side, specifically, this mobile management net element includes:

Determine unit 1401 ', for determining that target network side creates or retains the foundation information of carrying；

Transmitting element 1402 ', after determining that unit 1401 ' determines that target network side creates or retains the foundation information of carrying, send, to source network side shifting managed network element, foundation the information that described target network side creates or retains carrying, indicate the information of the carrying that source network side shifting managed network element determines that target network side can not create or retain.

Wherein, described target network side creates or retains foundation the information of carrying and includes whether the bearer context information of one of following information or its combination in any: UE, EPS loaded state cell, the local policy of target network side and target network side support to create the information of LIPAPDN connection.

The mobile management net element that both examples above provides, sent a notification message to source network side shifting managed network element by transmitting element or target network side creates or retains the foundation information of carrying so that source network side shifting managed network element knows the information of the carrying that target network side can not create or retain.

As shown in figure 15, for the embodiment of the present invention provide a kind of gateway SGW, including:

Receive unit 1501, for receiving the triggering instruction that source network side shifting managed network element sends, described trigger instruction be described source network side shifting managed network element know the carrying that target network side can not create or retain information after send；

Transmitting element 1502, for the triggering instruction received according to described reception unit, the second deletion conversation request message is sent to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

Wherein, the first of the operation mark of carrying that described reception unit 1501 sends specifically for receiving source network side shifting managed network element deletes conversation request message；Described transmitting element 1502, specifically for deleting the operation mark in conversation request message according to described first, sends the second deletion conversation request message to described block domain data network gateway.

The gateway that the embodiment of the present invention provides, according to receiving the operation mark that unit receives, trigger transmitting element and send the second deletion conversation request message to PGW, the information of the carrying that instruction PGW delete target network side can not create or retain, make PGW no longer retains the carrying information of redundancy, save network side load context resource.

As shown in figure 16, for the process system of a kind of carrying that the embodiment of the present invention provides, this system includes: source network side shifting managed network element 1601, source network side gateway 1602, block domain data network gateway 1603, wherein,

Described source network side shifting managed network element 1601, for after knowing the information of carrying that target network side can not create or retain, trigger source network-side service gateway 1602 sends the second deletion conversation request message to block domain data network gateway 1603；

Described source network side gateway 1602, for receiving the triggering instruction that source network side shifting managed network element 1601 sends, and trigger instruction according to described, sending the second deletion conversation request message to block domain data network gateway 1603, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain；

Block domain data network gateway 1603, for after receiving the second deletion conversation request message that source network side gateway 1602 sends, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain.

Wherein, described source network side shifting managed network element 1601 includes:

Transmitting element, for after the described information knowing carrying that unit knows that target network side can not create or retain, trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway；

Described source network side gateway 1602 includes:

Receive unit, for receiving the triggering instruction that source network side shifting managed network element sends, described trigger instruction be described source network side shifting managed network element know the carrying that target network side can not create or retain information after send；

Transmitting element, for the triggering instruction received according to described reception unit, sends the second deletion conversation request message to block domain data network gateway.

Additionally, this system also includes target network side mobile management net element, then described target network side mobile management net element is for sending a notification message to described source network side shifting managed network element 1601 so that described source network side shifting managed network element 1601 knows the information of carrying that target network side can not create or retain according to described notification message；Or,

Described target network side mobile management net element is for sending, to described source network side shifting managed network element 1601, the foundation information that target network side creates or retains carrying, described source network side shifting managed network element 1601 is created according to described target network side or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain, wherein, described target network side creates or retains the foundation information carried and includes one of following information or its combination in any: the bearer context information of subscriber equipment, EPS loaded state cell, whether the local policy of target network side and target network side are supported to create the LIPAPDN information connected.

Wherein, described source network side shifting managed network element 1601 and described target network side mobile management net element can be same mobile management net element, now, target network side mobile management net element, after determining the information of carrying that target network side can not create or retain, can send the first deletion conversation request message to source network side gateway.

nullThe processing method of a kind of carrying that the embodiment of the present invention provides and system，And mobile management net element and gateway，When being moved management process，Source network side gateway is indicated to send the second deletion conversation request message to PGW by source network side shifting managed network element，The information of the carrying that PGW delete target network side can not create or retain can be triggered，Make PGW no longer retains the carrying information of redundancy，Save network side load context resource，Additionally，Source network side shifting managed network element can know the information of carrying that target network side can not create or retain by the notification message that target network side mobile management net element sends，Or the foundation information that can be created or retain carrying by target network side that target network side mobile management net element sends determines the information of the carrying that target network side can not create or retain，The mode of the information of source network side shifting managed network element is known carrying that target network side can not create or retain is more flexible，Secondly，It is classified deleting conversation request operation，The carrying information that source network side and packet data gateway elder generation delete target network side can not create or retain，The carrying information that the remaining target network side of subscriber equipment can create or retain just is deleted afterwards in source network side，Enhance source network side and delete the operability of bearer context information and the motility of its UE created.

The foregoing is only presently preferred embodiments of the present invention; it is not intended to limit protection scope of the present invention; to those skilled in the art; the present invention can have various change and change; all any amendment, equivalent replacement or improvement etc. made under present invention spirit and principle instruct, are all contained within scope of the presently claimed invention.

Claims

1. the processing method of a carrying, it is characterised in that the method includes:

Described source network side shifting managed network element trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain；

Wherein, described source network side shifting managed network element knows the information of the carrying that target network side can not create or retain, create or retain the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side including: described source network side shifting managed network element, described target network side creates or retains the foundation information carried and includes one of following information or its combination in any: the bearer context information of subscriber equipment, EPS loaded state cell, whether the local policy of target network side and target network side are supported to create the LIPAPDN information connected.

2. method according to claim 1, it is characterised in that described source network side shifting managed network element trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, including:

Described source network side shifting managed network element sends the first deletion conversation request message carrying operation mark to source network side gateway, and described first deletes conversation request message carries the information of the carrying that described target network side can not create or retain；

Described source network side gateway according to described in carry operation mark first delete conversation request message, to described block domain data network gateway send second deletion conversation request message.

3. method according to claim 2, it is characterised in that described operation mark value is particular value.

4. method according to claim 1 and 2, it is characterised in that described source network side shifting managed network element knows the information of the carrying that target network side can not create or retain, including:

Described source network side shifting managed network element receives the notification message that target network side mobile management net element sends, and knows the information of carrying that target network side can not create or retain according to described notification message.

5. method according to claim 4, it is characterized in that, described source network side shifting managed network element receives the notification message that target network side mobile management net element sends, and knows the information of carrying that target network side can not create or retain according to described notification message, including:

If described notification message carries mark or the Access Point Name of the carrying that target network side can not create or retain, described source network side shifting managed network element directly knows the information of the carrying that described target network side can not create or retain；Or

If described notification message carries mark or the Access Point Name of the carrying that target network side can create or retain, the mark of the carrying that described source network side shifting managed network element can create according to bearer context information and the described target network side of locally stored user equipment (UE) or retain or Access Point Name, it is determined that the information of the carrying that target network side can not create or retain；Or

If described notification message carries evolved packet system EPS loaded state cell, described EPS loaded state cell specifies carrying that target network side can create or retain and the carrying that target network side can not create or retain respectively, and described source network side shifting managed network element knows the information of carrying that target network side can not create or retain according to described EPS loaded state cell；Or

If described notification message carries local internet protocol, mark is not supported in access LIPA packet data network PDN connection, and described source network side shifting managed network element connects according to described LIPAPDN not to support to identify knows that the LIPAPDN that target network side can not create or retain connects.

6. method according to claim 4, it is characterized in that, described source network side shifting managed network element receives the notification message of target network side mobile management net element transmission and includes: receive context response message or forwarding redirection response message that described target network side mobile management net element sends.

7. method according to claim 4, it is characterised in that before the notification message that described reception target network side mobile management net element sends, described method also includes:

Described target network side mobile management net element creates or retains the information of the carrying that foundation the information of carrying determines that target network side can not create or retain according to target network side, and described target network side creates or retains foundation the information of carrying and includes one of following information or its combination in any: whether the bearer context information of subscriber equipment, EPS loaded state cell, the local policy of target network side and target network side support the information of establishment LIPAPDN connection.

8. method according to claim 1, it is characterised in that described method also includes:

If source network side shifting managed network element and target network side mobile management net element are same mobile management net element, whether the bearer context information of subscriber equipment, the local policy of target network side and target network side that the acquisition of described source network side shifting managed network element preserves self are supported to create the LIPAPDN information connected, and obtain the EPS loaded state cell of subscriber equipment transmission；Or,

If source network side shifting managed network element and target network side mobile management net element are different mobile management net elements, described source network side shifting managed network element obtains the bearer context information of subscriber equipment that self preserves, and obtains whether EPS loaded state cell that described target network side mobile management net element forwards, the local policy of target network side and target network side are supported to create the LIPAPDN information connected.

9. method according to claim 8, it is characterised in that the described information creating or retaining the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side, including:

Whether the bearer context information according to described subscriber equipment is inconsistent with EPS loaded state cell, it is determined that the information of the carrying that target network side can not create or retain；Or

Local policy according to described target network side determines the information of the carrying that target network side can not create or retain, and wherein, the local policy of described target network side comprises access PDN and connects quantity and/or bearer context quantity control strategy；Or

Whether support to create the LIPAPDN information connected according to described target network side, it is determined that the LIPAPDN that target network side can not create or retain connects.

10. method according to claim 1 and 2, it is characterised in that described source network side gateway to described block domain data network gateway send second deletion conversation request message after, also include:

Described source network side shifting managed network element sends the 3rd deletion conversation request message to described source network side gateway, and the described 3rd deletes conversation request message indicates described source network side gateway to delete the information of the carrying that the remaining target network side of subscriber equipment can create or retain.

11. the processing method of a carrying, it is characterised in that the method includes:

Source network side gateway receives the triggering instruction that source network side shifting managed network element sends, described trigger instruction be described source network side shifting managed network element know the carrying that target network side can not create or retain information after send, wherein, described source network side shifting managed network element creates or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side, described target network side creates or retains the foundation information carried and includes one of following information or its combination in any: the bearer context information of subscriber equipment, EPS loaded state cell, whether the local policy of target network side and target network side are supported to create the LIPAPDN information connected；

Described source network side gateway triggers instruction according to described, the second deletion conversation request message is sent to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain.

12. method according to claim 11, it is characterized in that, described source network side gateway receives the triggering instruction of source network side shifting managed network element transmission and includes: receiving the first deletion conversation request message carrying operation mark that described source network side shifting managed network element sends, described first deletes conversation request message carries the information of the carrying that described target network side can not create or retain；

Then, described source network side gateway according to described in carry operation mark first delete conversation request message, to described block domain data network gateway send second deletion conversation request message.

13. the method according to claim 11 or 12, it is characterised in that described source network side gateway to described block domain data network gateway send second deletion conversation request message after, also include:

Described source network side gateway receives the 3rd deletion conversation request message that described source network side shifting managed network element sends, and the described 3rd deletes conversation request message indicates described source network side gateway to delete the information of the carrying that the remaining target network side of subscriber equipment can create or retain.

14. a mobile management net element, it is characterised in that including:

Transmitting element, for after the described information knowing carrying that unit knows that target network side can not create or retain, trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway, described second deletes conversation request message carries the information of the carrying that described target network side can not create or retain, in order to described block domain data network gateway deletes the information of the carrying that described target network side can not create or retain；

Wherein, know described in unit specifically for: create or retain the information of the carrying that the foundation information of carrying determines that target network side can not create or retain according to target network side；Wherein, described target network side creates or retains foundation the information of carrying and includes one of following information or its combination in any: whether the bearer context information of subscriber equipment, EPS loaded state cell, the local policy of target network side and target network side support to create the information of LIPAPDN connection.

15. mobile management net element according to claim 14, it is characterised in that described in know that unit includes:

16. mobile management net element according to claim 14, it is characterised in that described in know that unit includes:

17. according to the mobile management net element described in claim 14-16 any one, it is characterised in that described transmitting element specifically for:

After the described information knowing carrying that unit knows that target network side can not create or retain, the the first deletion conversation request message carrying operation mark is sent to source network side gateway, described first deletes conversation request message carries the information of the carrying that described target network side can not create or retain, and described operation mark trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway.

18. mobile management net element according to claim 17, it is characterised in that described transmitting element is additionally operable to:

After the information of the carrying that can not create or retain at delete target network side, sending the 3rd deletion conversation request message to described source network side gateway, the described 3rd deletes conversation request message indicates described source network side gateway to delete the information of the carrying that the remaining target network side of subscriber equipment can create or retain.

19. a gateway, it is characterised in that including:

20. gateway according to claim 19, it is characterised in that the first of the operation mark of carrying that described reception unit sends specifically for receiving source network side shifting managed network element deletes conversation request message；Described transmitting element, specifically for deleting the operation mark in conversation request message according to described first, sends the second deletion conversation request message to described block domain data network gateway.

21. the process system of a carrying, it is characterised in that including: source network side shifting managed network element, source network side gateway and block domain data network gateway, wherein,

Block domain data network gateway, for after receiving the second deletion conversation request message that source network side gateway sends, according to the described second information deleting the carrying that the target network side carried in conversation request message can not create or retain, delete the information of the carrying that described target network side can not create or retain；

Wherein, described system also includes target network side mobile management net element；

Described target network side mobile management net element is for sending, to described source network side shifting managed network element, the foundation information that target network side creates or retains carrying, described source network side shifting managed network element is created according to described target network side or retains the information of the carrying that the foundation information of carrying determines that target network side can not create or retain, wherein, described target network side creates or retains the foundation information carried and includes one of following information or its combination in any: the bearer context information of subscriber equipment, EPS loaded state cell, whether the local policy of target network side and target network side are supported to create the LIPAPDN information connected.

22. system according to claim 21, it is characterised in that described source network side shifting managed network element includes:

Transmitting element, for after the described information knowing carrying that unit knows that target network side can not create or retain, trigger source network-side service gateway sends the second deletion conversation request message to block domain data network gateway.

23. the system according to claim 21 or 22, it is characterised in that described source network side gateway includes:

24. system according to claim 23, it is characterised in that described source network side shifting managed network element and described target network side mobile management net element are same mobile management net element.