CN103415050A

CN103415050A - Processing method and device for cell ping-pong reselection between TD-SCDMA and TD-LTE

Info

Publication number: CN103415050A
Application number: CN2013103118208A
Authority: CN
Inventors: 赵博
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-07-23
Filing date: 2013-07-23
Publication date: 2013-11-27
Anticipated expiration: 2033-07-23
Also published as: CN103415050B

Abstract

The invention provides a processing method and device for cell ping-pong reselection between TD-SCDMA and TD-LTE. The method comprises the steps that when a MME detects that UE reselects a TD-LTE network from a TD-SCDMA network registered by the UE, context request messages are sent to a SGSN; the MME receives context response messages returned by the SGSN; when the MME finds context information and bearing information corresponding to the UE in local resources according to the context response messages, session deletion request messages are sent to a SGW; when the MME receives session deletion response messages returned by the SGW, the context information and the bearing information corresponding to the UE in the local resources are deleted; after the MME stores the context response messages, context confirmation messages are returned to the SGSN. The processing method and device for cell ping-pong reselection between the TD-SCDMA and the TD-LTE aims at improving success rate of network interoperability and improving user perception.

Description

The processing method of cell pingpong reselection and device between TD-SCDMA and TD-LTE

Technical field

The present invention relates to wireless communication technology field, particularly relate to processing method and the device of cell pingpong reselection between a kind of TD-SCDMA network and TD-LTE network.

Background technology

In mobile communication system, often there is the user equipment (UE) that is in idle pulley, wherein cell reselection is a most important task in idle pulley.By cell reselection, make the user equipment (UE) end resident in the community of high-quality.Wherein, the TD-SCDMA(TD SDMA, TimeDivision-Synchronous Code Division Multiple Access) with TD-LTE(time-division Long Term Evolution, Time Division Long Term Evolution), be divided into the tracking area update TAU(Tracking AreaUpdate of TD-SCDMA network to the TD-LTE network across cell reselection) flow process and TD-LTE network be to the routing region updating RAU(Routing Area Update of TD-SCDMA network) flow process.

If user equipment (UE) detects the better quality of TD-LTE network cell after choosing the TD-SCDMA network very soon, ping-pong reselection is to the TD-LTE network again, now at the TD-LTE network, also do not delete contextual information and the beared information of this user equipment (UE), when the TAU flow process triggered from the TD-SCDMA network to the TD-LTE network, if the mobile management device MME of TD-LTE network thinks that user equipment (UE) is the user equipment (UE) that newly accesses the TD-LTE network, for this user equipment (UE), distribute new resources, and when preserving serving GPRS support node SGSN and replying context response information, in the local resource of discovery mobile management entity MME, have the resource identical with this user equipment (UE), now at the TD-LTE network, will how to process, in agreement, do not provide to solve and describe.

Therefore, one of problem that those skilled in the art are in the urgent need to address is, proposes processing method and the device of ping-pong reselection between a kind of TD-SCDMA and TD-LTE, when from the TD-SCDMA network reselection to the TD-LTE network, can improve the network interoperability success rate, promote user awareness.

Summary of the invention

Technical problem to be solved by this invention is to provide the processing method of cell pingpong reselection between a kind of TD-SCDMA network and TD-LTE network, in order to improve network interoperability success rate and efficiency, promotes user awareness.

Accordingly, the present invention also provides the processing unit for cell pingpong reselection between above-mentioned a kind of TD-SCDMA network and TD-LTE network.

In order to address the above problem, the invention discloses the processing method of cell pingpong reselection between a kind of TD-SCDMA and TD-LTE, comprising:

When mobile management entity MME detects user equipment (UE) and returns the TD-LTE network from its TD-SCDMA network reselection of registering, send context request message to serving GPRS support node SGSN;

Described mobile management entity MME receives the context response information that described serving GPRS support node SGSN returns for described context request message;

When described mobile management entity MME finds contextual information that described user equipment (UE) is corresponding and beared information according to described context response information in local resource, to gateway SGW, send request the session deletion request message of deleting described contextual information and beared information;

When described mobile management entity MME receives described gateway SGW and returns to the session of agree deleting described contextual information and beared information and delete response message for described session deletion request message, delete corresponding contextual information and the beared information of user equipment (UE) described in local resource;

Described mobile management entity MME is returned to context acknowledgement message to described serving GPRS support node SGSN after preserving described context response information.

Preferably, described context response information comprises international mobile subscriber identity IMSI, and described mobile management entity MME searches according to described context response information contextual information and the beared information that described user equipment (UE) is corresponding by following sub-step in local resource:

Described mobile management entity MME is from extracting international mobile subscriber identity IMSI described context response information;

Described mobile management entity MME adopts described international mobile subscriber identity IMSI in local resource, to search contextual information and the beared information of the correspondence of corresponding user equipment (UE).

Preferably, described method also comprises:

After described mobile management entity MME sends the session deletion request message to gateway SGW, start timer T;

And,

When described mobile management entity MME receives session that described gateway SGW returns for described session deletion request message and deletes response message, stop described timer T.

Preferably, described method also comprises:

If described mobile management entity MME does not receive described gateway SGW and deletes response message for the session that described session deletion request message returns within the time period default over described timer T, stop described timer T, and delete corresponding contextual information and the beared information of user equipment (UE) described in local resource.

Preferably, user equipment (UE) detected when from its TD-SCDMA network of registering, being linked into first the TD-LTE network described when mobile management entity MME, before to serving GPRS support node SGSN, sending the step of context request message, also comprise:

When user equipment (UE) access TD-SCDMA network, the routing update request that serving GPRS support node SGSN sends for receiving user equipment (UE), mobile management entity MME receives the context request message that serving GPRS support node SGSN sends;

Described mobile management entity MME is returned to context response information for described context request message, and reception serving GPRS support node SGSN sends context acknowledgement message, described serving GPRS support node SGSN is for sending the routing update response message to user equipment (UE), and receives described user equipment (UE) and complete message for the routing update that described routing update response message returns; Described context response information comprises contextual information, and described routing update response message comprises grouping temporary mobile subscriber identity P-TMSI.

Preferably, when described user equipment (UE) detects quality in the TD-LTE network higher than the quality of TD-SCDMA network, adopt the Tracking Area Identifier RAI of described TD-SCDMA network and described grouping temporary mobile subscriber identity P-TMSI to remap and generate subscriber equipment temporary mark GUTI, trigger the tracking area update request.

The embodiment of the present invention also provides the processing unit of cell pingpong reselection between a kind of TD-SCDMA and TD-LTE, comprising:

Be positioned at the context request message sending module of mobile management entity MME, when to user equipment (UE) from its TD-SCDMA network reselection of registering, returning the TD-LTE network, send context request message to serving GPRS support node SGSN;

Be positioned at the context response information receiver module of mobile management entity MME, the context response information of returning for described context request message be used to receiving described serving GPRS support node SGSN;

Be positioned at the session deletion request message sending module of mobile management entity MME, for according to described context response information when local resource finds contextual information that described user equipment (UE) is corresponding and beared information, to gateway SGW, send request the session deletion request message of deleting described contextual information and beared information;

The response message receiver module is deleted in the session that is positioned at mobile management entity MME, for when receiving described gateway SGW and return to the session of agree deleting contextual information described in local resource and beared information and delete response message for described session deletion request message, corresponding contextual information and the beared information of user equipment (UE) described in the deletion local resource;

Be positioned at the context acknowledgement message sending module of mobile management entity MME, after preserving described context response information, return to context acknowledgement message to described serving GPRS support node SGSN.

Preferably, the described context response information that is arranged in mobile management entity MME comprises international mobile subscriber identity IMSI, and the described session that is positioned at mobile management entity MME is deleted the response message receiver module and comprised:

Be positioned at the extraction submodule of mobile management entity MME, for from described context response information, extracting international mobile subscriber identity IMSI;

Be positioned at the submodule of searching of mobile management entity MME, at local resource, search contextual information and the beared information of the correspondence of corresponding user equipment (UE) for adopting described international mobile subscriber identity IMSI.

Preferably, described device also comprises:

The timer that is positioned at mobile management entity MME starts module, for after to gateway SGW, sending the session deletion request message, starts timer T;

Be positioned at the timer stopping modular of mobile management entity MME, while for the session of returning for described session deletion request message at the described gateway SGW of reception, deleting response message, stop described timer T.

Preferably, described device also comprises:

Be positioned at the information deletion module of mobile management entity MME, when in described mobile management entity MME, surpassing described timer T, in the default time period, not receiving session that described gateway SGW returns for described session deletion request message and delete response message, stop described timer T, and delete corresponding contextual information and the beared information of user equipment (UE) described in local resource.

Preferably, described device also comprises:

Be positioned at the context request message receiver module of mobile management entity MME, for when user equipment (UE) accesses the TD-SCDMA network, the routing update request RAU that serving GPRS support node SGSN sends for receiving user equipment (UE), receive the context request message that serving GPRS support node SGSN sends;

Be positioned at the context response information sending module of mobile management entity MME, for for described context request message, returning to context response information, and reception serving GPRS support node SGSN sends context acknowledgement message, described serving GPRS support node SGSN is for sending the routing update response message to user equipment (UE), and receives described user equipment (UE) and complete message for the routing update that described routing update response message returns; Described context response information comprises contextual information, and described routing update response message comprises grouping temporary mobile subscriber identity P-TMSI.

Compared with prior art, the present invention includes following advantage:

In embodiments of the present invention, RAU flow process when user equipment (UE) from the TD-LTE network to the TD-SCDMA network, if user equipment (UE) detects the better quality of TD-LTE network cell after choosing the TD-SCDMA network very soon, when ping-pong reselection returns the TD-LTE network again, after the TAU flow process triggered from the TD-SCDMA network to the TD-LTE network, contextual information and beared information that deletion this user equipment (UE) on mobile management entity MME is original, avoid preserving and clashing from the information such as contextual information that serving GPRS support node SGSN obtains, therefore, when from TD-SCDMA network ping-pong reselection to the TD-LTE network, can improve the network interoperability success rate, promote user awareness.

In order to delete original contextual information and the beared information of this user equipment (UE) on mobile management entity MME, avoid preserving and clashing from the information such as contextual information that serving GPRS support node SGSN obtains, the message that mobile management entity MME is deleted contextual information and beared information to gateway SGW request, and startup timer T, if mobile management entity MME receives agreement that described gateway SGW returns while deleting the response message of the relevant contextual information of this user equipment (UE) and beared information, stop described timer T, if described mobile management entity MME is when surpassing described timer T and in the default time period, do not receive described gateway SGW and return to the response message of the relevant contextual information of agreeing to delete this user equipment (UE) and beared information, stop described timer T, and deletion user equipment (UE) is corresponding in the mobile management entity MME local resource contextual information and beared information, even abnormal conditions occur, also can guarantee that mobile management entity MME can delete original contextual information and the beared information of user equipment (UE) of its preservation in time, avoid deallocated resources and local source material to clash.

The accompanying drawing explanation

Fig. 1 is a kind of schematic diagram of routing region updating RAU flow process;

Fig. 2 is a kind of schematic diagram of tracking area update TAU flow process;

Fig. 3 is the flow chart of steps of the processing method embodiment 1 of cell pingpong reselection between a kind of TD-SCDMA of the present invention and TD-LTE;

Fig. 4 is the flow chart of steps of the processing method embodiment 2 of cell pingpong reselection between a kind of TD-SCDMA of the present invention and TD-LTE;

Fig. 5 be a kind of TD-SCDMA of the present invention the handling process schematic diagram of TD-LTE ping-pong reselection;

Fig. 6 is the structured flowchart of the processing unit embodiment of cell pingpong reselection between a kind of TD-SCDMA of the present invention and TD-LTE.

Embodiment

For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.

In order to make those skilled in the art further understand the embodiment of the present invention, below to route area update RAU flow process (Routing Area Update procedure), and tracking area update TAU flow process (Tracking Area Update procedure) is carried out brief description.

With reference to the schematic diagram of a kind of routing region updating RAU flow process shown in Figure 1, concrete steps flow chart is as follows:

Step 1, MS(is user equipment (UE)) to serving GPRS support node new GnGp SGSN(Serving GPRS Support Node, the GPRS serving GPRS support node) send routing region updating request message (Routing Area Update Request), wherein, described Gn, Gp are the interface of serving GPRS support node SGSN;

Step 2, serving GPRS support node new GnGp SGSN sends context request message (SGSN Context Request) to mobile management entity MME, and mobile management entity MME is returned to (SGSN Context Response) after receiving; Wherein, in context response information, carry MM and PDP Context information, now mobile management entity MME starts a timer; Wherein, MM context (Mobility Management Context, the information that user mobility management is relevant) content comprises mobile management and security-related parameters, such as MS Network Capability(user equipment network ability), DRX parameter(noncontinuity receives parameter), Authentication Quintuplet(authentication five-tuple), CK(computational security key), IK(calculation of integrity key) etc.;

Step 3, if mobile management entity MME is returned to context response information and is carried refuse information cause and indicate this customer equipment identification not mate, serving GPRS support node new GnGp SGSN starts safety function (Security Functions), to home subscriber server HSS(VLR) and user equipment (UE) initiation encryption and authentication process; Serving GPRS support node new GnGp SGSN is to home subscriber server HSS(VLR) the request authentication vector, to user equipment (UE), send the RAND(random number), AUTN(network authentication token), the KSI(root key) security parameter such as, user equipment (UE) can calculate coupling after receiving, and replys relevant information to serving GPRS support node new GnGp SGSN;

Step 4, serving GPRS support node new GnGp SGSN returns to context acknowledgement message (SGSN Context Acknowledge) to mobile management entity MME; It should be noted that, step 5 is that serving GPRS support node old GnGp SGSN sends Forward data message to serving GPRS support node new GnGp SGSN, and mobile management device MME does not send this message to GnGpSGSN in 23.401 agreements, so omitted step 5;

Step 6, serving GPRS support node new GnGp SGSN sends PDP Context update request message (Update PDP Context Request) to gateway SGW; And reception is upgraded response message (Update PDP Context Response) from the PDP Context that gateway SGW returns;

Step 7, serving GPRS support node new GnGp SGSN sends updating location information request message (Update Location) to home subscriber server HSS, and the positional information of notification service support node new GnGpSGSN changes;

Step 8, home subscriber server HSS sends positional information to original serving GPRS support node old GnGp SGSN and deletes message (Cancel Location), and receives the positional information deletion acknowledge message (Cancel Location Ack) that serving GPRS support node old GnGpSGSN returns;

Step 9, home subscriber server HSS (VLR) sends and inserts subscription data request message (Insert Subscriber Data) to serving GPRS support node new GnGp SGSN, user contracting data is issued to new GnGp SGSN, and serving GPRS support node new GnGp SGSN can verify whether this user equipment (UE) is allowed to according to user contracting data.And reply and insert subscription data acknowledge message (Insert Subscriber Data Ack) to home subscriber server HSS;

Step 10, home subscriber server HSS sends updating location information response message (Update Location Ack) to serving GPRS support node new GnGp SGSN;

Step 11, serving GPRS support node new GnGp SGSN sends routing region updating receipt message (Routing Area Update Accept) to user equipment (UE); If serving GPRS support node newGnGp SGSN has redistributed P-TMSI (Packet Temperate MobileSubscription Identity to the user, the grouping temporary mobile subscriber identity), in the routing region updating receipt message, carry the P-TMSI of distribution;

Step 12, user equipment (UE) is replied routing region updating to serving GPRS support node new GnGp SGSN and is completed message (Routing Area Update complete);

Step 13, after mobile management entity MME starts in step 2 timer expiry, mobile management entity MME sends session deletion request message (DeleteSession Request) to gateway SGW, request deleting bearing information, gateway SGW returns to session and deletes response message (Delete Session Response), the success of deleting bearing information; If the S1 between mobile management entity MME and evolution base station eNodeB links existence, mobile management entity MME sends UE context release message (Context Release Command) to evolution base station eNodeB, request discharges the S1 link, evolution base station eNodeB returns to Context ReleaseComplete to user equipment (UE), the success of S1 Connection Release.

With reference to the schematic diagram of a kind of tracking area update flow process TAU flow process shown in Figure 2, concrete steps flow chart is as follows:

Step 1, user equipment (UE) trigger tracking area update TAU flow process;

Step 2, user equipment (UE) sends tracking area update request message (Tracking Area Update Request) to evolution base station eNodeB;

Step 3, evolution base station eNodeB is the PDU(protocol Data Unit of (NAS) using the tracking area update request message as Non-Access Stratum) be wrapping in S1AP message and send to mobile management entity MME;

Step 4, mobile management entity MME send context request message (SGSN ContextRequest) to serving GPRS support node GnGp SGSN;

Step 5, serving GPRS support node GnGp SGSN returns to context response information (SGSN Context Response) to mobile management entity MME, wherein, in context response information, carry IMSI(International Mobile Subscriber Identification Number, international mobile subscriber identity), MM(Mobility Management Context, the information that the user equipment (UE) mobile management is relevant), with PDP(Packet Data Protocol Context, block data protocol context);

Step 6, mobile management entity MME are initiated safe procedures Security procedures;

Step 7, mobile management entity MME send context response information (SGSN ContextAcknowledge) to serving GPRS support node GnGp SGSN;

Step 8, serving GPRS support node GnGp SGSN may arrive gateway SGW by forward pass PDP Context (PDPcontext), and gateway SGW will abandon these data;

Step 9, mobile management entity MME is selected a gateway SGW, sends and creates conversation request message (Create Session Request) to gateway SGW, and request creates carrying;

Step 10, gateway SGW sends carrying change request message (Modify Bearer Request) to PDN Gateway PGW, upgrades IP and the TEID (Tunnel EndPoint Identifier, GTPC Tunnel Identifier) of signaling plane and user's face.And RAT(Tracking Area Identifier);

Step 11, PDN Gateway PGW is to PCRF(Policy And Charging RulesFunction, "Policy and Charging Rules Function) initiate the IP-CAN session modification, the variation of notice RAT, PCRF may re-issue the information such as service quality QoS.

Step 12, PDN Gateway PGW returns to carrying change response message (Modify BearerResponse) to gateway SGW, is updated successfully;

Step 13, gateway SGW sends conversation establishing response message (Create Session Response) message to mobile management entity MME, creates and carries successfully.

In practice, RAU flow process at user equipment (UE) from the TD-LTE network to the TD-SCDMA network, session delete procedure between mobile management entity MME and gateway SGW need to rely on timer to guarantee, if user equipment (UE) detects the better quality of TD-LTE network cell after choosing the TD-SCDMA network very soon, ping-pong reselection is to the TD-LTE network again, now at the TD-LTE network, also do not delete contextual information and the beared information of this user equipment (UE), when the TAU flow process triggered from the TD-SCDMA network to the TD-LTE network, and mobile management entity MME is found contextual information and the beared information identical with this user equipment (UE) in local resource, now at the TD-LTE network, will how to process, in agreement, do not provide to solve and describe.

In order to address the above problem, one of core idea of the embodiment of the present invention is, RAU flow process when user equipment (UE) from the TD-LTE network to the TD-SCDMA network, if user equipment (UE) detects the better quality of TD-LTE network cell after choosing the TD-SCDMA network very soon, when ping-pong reselection is to the TD-LTE network again, after the TAU flow process triggered from the TD-SCDMA network to the TD-LTE network, deletion is at contextual information and the beared information of this user equipment (UE) of mobile management entity MME preservation, and the information such as contextual information that will again distribute for this user equipment (UE) are preserved, therefore, when user equipment (UE) during from TD-SCDMA network ping-pong reselection to the TD-LTE network, not can with mobile management entity MME in local resource clash, can improve the network interoperability success rate, promote user awareness.

With reference to Fig. 3, show the flow chart of steps of the processing method embodiment 1 of cell pingpong reselection between a kind of TD-SCDMA of the present invention and TD-LTE, specifically can comprise the steps:

Step 101, when mobile management entity MME detects user equipment (UE) and returns the TD-LTE network from its TD-SCDMA network reselection of registering, send context request message to serving GPRS support node SGSN;

In specific implementation, when user equipment (UE) detects while meeting gravity treatment to the reselection conditions of TD-LTE network, as the quality of TD-LTE network during higher than the quality of TD-SCDMA network, the tracking area update request that user equipment (UE) sends to mobile management entity MME, when the TD-LTE network is returned in gravity treatment, after the tracking area update request that mobile management entity MME mobile management entity MME reception user equipment (UE) sends, to serving GPRS support node SGSN, send context request message, be this user equipment (UE) request Resources allocation.

Step 102, described mobile management entity MME receive the context response information that described serving GPRS support node SGSN returns for described context request message;

When serving GPRS support node SGSN receives the context request message of mobile management entity MME transmission, reply and carry international mobile subscriber identity IMSI, the context response information of MM contextual information and PDP Context information to mobile management entity MME.

Step 103, when described mobile management entity MME finds contextual information that described user equipment (UE) is corresponding and beared information according to described context response information in local resource, to gateway SGW, send request the session deletion request message of deleting described contextual information and beared information;

In a preferred embodiment of the present invention, described context response information comprises international mobile subscriber identity IMSI, and described mobile management entity MME searches according to described context response information contextual information and the beared information that described user equipment (UE) is corresponding by following sub-step in local resource:

In specific implementation, after mobile management entity MME receives the context response information that serving GPRS support node SGSN returns, while in the mobile management entity MME local resource, preserving, find the international mobile subscriber identity IMSI identical with context response information, illustrate that local resource has had contextual information and the beared information of the correspondence of this user equipment (UE), for fear of with local resource, clashing, mobile management entity MME sends the session deletion request message to gateway SGW, contextual information and the beared information of the correspondence of the original user equipment (UE) in local resource deleted in request.

Step 104, when described mobile management entity MME receives agreement that described gateway SGW returns for described session deletion request message, delete described contextual information and beared information session while deleting response message, delete corresponding contextual information and the beared information of user equipment (UE) described in local resource;

Step 105, described mobile management entity MME is returned to context acknowledgement message to described serving GPRS support node SGSN after preserving described context response information.

In embodiments of the present invention, when gateway SGW receives the session deletion request message that mobile management entity MME sends, if agree, delete contextual information and the beared information of the correspondence of the local original user equipment UE of preserving of mobile management entity MME, return to session and delete response message, the indication mobile management entity MME is carried out deletion action.Mobile management entity MME receives session while deleting after response message the contextual information of the correspondence of deleting the original user equipment (UE) of preserving original this locality and beared information, preserve the information such as contextual information that serving GPRS support node SGSN redistributes, and return to context acknowledgement message to serving GPRS support node SGSN, reported the operation of preserving the information such as contextual information.

In specific implementation, when mobile management entity MME is returned to context acknowledgement message to serving GPRS support node SGSN, can also select a gateway SGW and send to create conversation request message, request creates carrying, if gateway SGW agrees this request, to mobile management entity MME, send the establishment conversational response message of carrying beared information, mobile management entity MME is preserved described beared information in local resource, creates and carries successfully.

It should be noted that, the original gateway SGW that mobile management entity MME can be selected, also can select other gateway SGW, and the embodiment of the present invention is not restricted this.

With reference to Fig. 4, show the flow chart of steps of the processing method embodiment 2 of cell pingpong reselection between a kind of TD-SCDMA of the present invention and TD-LTE, specifically can comprise the steps:

Step 201, when user equipment (UE) access TD-SCDMA network, mobile management entity MME receives the context request message that serving GPRS support node SGSN sends, the routing update request that serving GPRS support node SGSN sends for receiving user equipment (UE);

Step 202, described mobile management entity MME is returned to context response information for described context request message, and reception serving GPRS support node SGSN sends context acknowledgement message, described serving GPRS support node SGSN is for sending the routing update response message to user equipment (UE), and receives described user equipment (UE) and complete message for the routing update that described routing update response message returns; Described context response information comprises contextual information, and described routing update response message comprises grouping temporary mobile subscriber identity P-TMSI;

Step 203, when described user equipment (UE) detects quality in the TD-LTE network higher than the quality of TD-SCDMA network, adopt the Tracking Area Identifier RAI of described TD-SCDMA network and described grouping temporary mobile subscriber identity P-TMSI to remap and generate subscriber equipment temporary mark GUTI, trigger the tracking area update request;

In specific implementation, user equipment (UE) is attached to the TD-LTE network, initiate the Routing Area Update request to the TD-SCDMA network, in the ordinary course of things, the serving GPRS support node SGSN of TD-SCDMA network can distribute new grouping temporary mobile subscriber identity P-TMSI to user equipment (UE).Serving GPRS support node SGSN is to mobile management entity MME request mobile management context and bearer context in the TD-LTE network, subsequently and gateway GPRS supporting node (GGSN) GGSN has exchanged that PDP Context upgrades and and HSS between position upgrade mutual, , send Routing Area Update to user equipment (UE) and accept message, wherein carry the grouping temporary mobile subscriber identity P-TMSI that serving GPRS support node SGSN redistributes to user equipment (UE), user equipment (UE) replys to serving GPRS support node SGSN the RAU flow process that the Routing Area Update response message finishes the TD-SCDMA network side.Now user equipment (UE) checks that the TD-LTE network quality is higher, re-constructs according to the P-TMSI in the Routing Area Update response message and Tracking Area Identifier RAI, generates subscriber equipment temporary mark GUTI, triggers the TAU flow process, and the TD-LTE network is returned in gravity treatment.

Step 204, when the tracking area update request that mobile management entity MME reception user equipment (UE) sends, send context request message to serving GPRS support node SGSN;

Step 205, described mobile management entity MME receive the context response information that described serving GPRS support node SGSN returns for described context request message;

Step 206, when described mobile management entity MME finds contextual information that described user equipment (UE) is corresponding and beared information according to described context response information in local resource, to gateway SGW, send request the session deletion request message of deleting described contextual information and beared information;

Step 207, after described mobile management entity MME sends the session deletion request message to gateway SGW, start timer T;

Step 208, when described mobile management entity MME receives described gateway SGW and returns to the session of agree deleting described contextual information and beared information and delete response message for described session deletion request message, delete corresponding contextual information and the beared information of user equipment (UE) described in local resource;

Step 209, when described mobile management entity MME receives session that described gateway SGW returns for described session deletion request message and deletes response message, stop described timer T.

When the TD-LTE network is returned in the user equipment (UE) gravity treatment, the timer that now in the TD-LTE network, mobile management entity MME starts in upper once RAU flow process does not also have overtime, also namely also to gateway SGW, do not send the session deletion request message, the mobile management device MME of TD-LTE network also preserves contextual information and the beared information of this user equipment (UE).

After mobile management entity MME sends the session deletion request message to gateway SGW, start timer T, if gateway SGW agrees contextual information and the beared information of the correspondence of the original user equipment UE of preserving in deletion mobile management entity MME local resource, return to session and delete response message, the indication mobile management entity MME is carried out deletion action, and stop timer T, to save Internet resources.

According to subscriber equipment temporary mark GUTI, think newly to access the user equipment (UE) of TD-LTE network, when gateway SGW receives the session deletion request message that mobile management entity MME sends, if agree, delete contextual information and the beared information of the correspondence of the local original user equipment UE of preserving of mobile management entity MME, return to session and delete response message, the indication mobile management entity MME is carried out deletion action.Mobile management entity MME receives session while deleting after response message the contextual information of the correspondence of deleting the original user equipment (UE) of preserving original this locality and beared information, preserve the information such as contextual information that serving GPRS support node SGSN redistributes, and return to context acknowledgement message to serving GPRS support node SGSN, reported the operation of preserving the information such as contextual information.

Step 210, described mobile management entity MME is returned to context acknowledgement message to described serving GPRS support node SGSN after preserving described context response information.

In a preferred embodiment of the present invention, described method can also comprise:

In embodiments of the present invention, preferably, if timer T does not receive the message that gateway SGW returns after surpassing the Preset Time section, automatically delete local resource message, avoided when abnormal conditions occurring, can not delete in time corresponding contextual information and the beared information of original user equipment UE in the mobile management entity MME local resource, cause conflict.

In order to make those skilled in the art further understand the embodiment of the present invention, below by a concrete example, a kind of processing method of TD-SCDMA TD-LTE ping-pong reselection is described.

With reference to of the present invention a kind of TD-SCDMA shown in Figure 5 the handling process schematic diagram of TD-LTE ping-pong reselection, specifically can comprise the steps:

Step 1, user equipment (UE), in the TD-LTE network attachment, are initiated the Routing Area Update request message to the TD-SCDMA network;

Step 2, after serving GPRS support node SGSN receives the Routing Area Update request message, to user equipment (UE), distribute new grouping temporary mobile subscriber identity P-TMSI, serving GPRS support node SGSN is carried at newly assigned grouping temporary mobile subscriber identity P-TMSI in the Routing Area Update response message, user equipment (UE) is preserved the grouping temporary mobile subscriber identity P-TMSI of distribution and the Routing Area identification RAI of TD-SCDMA network, and execution step 2-12 completes follow-up routing area updating RAU flow process, due to step 2-12 and aforesaid routing area updating RAU flow process similar, therefore at this, do not repeat,

Step 13, user equipment (UE) are according to the grouping temporary mobile subscriber identity P-TMSI that TIN indicates, and will divide into groups temporary mobile subscriber identity P-TMSI and Routing Area identification RAI mapping generate subscriber equipment temporary mark GUTI, trigger the TAU flow process.When mobile management entity MME is received the tracking area update request message that user equipment (UE) sends, the timer started in step 2 does not also have overtime, mobile management entity MME is also preserved the original contextual information of this user equipment (UE) and beared information, mobile management entity MME is new user equipment (UE) according to the subscriber equipment temporary mark GUTI value judgement that the tracking area update request message carries, and for this user equipment (UE), redistributes resource;

Step 14, mobile management entity MME send context request message to serving GPRS support node SGSN, are this user equipment (UE) request contexts information, and serving GPRS support node SGSN replys context response information, wherein carries IMSI, MM and PDP Context;

If step 15 mobile management entity MME finds that there is identical IMSI and contextual information and beared information when local resource is preserved, to gateway SGW, initiate to delete conversation request message, and the timer T of the conversational response to be deleted such as startup;

Step 16, if in the default time, receive the deletion conversational response message that gateway SGW returns at timer T, mobile management entity MME stops at the timer started in step 2, stop timer T, and delete contextual information and the beared information of this user equipment (UE) in the local resource of mobile management entity MME;

Step 17, after deleting the contextual information and beared information of this user equipment (UE) in the mobile management entity MME resource, mobile management entity MME IMSI, the MM in the tracking area update request and PDP Context again is saved in the new resource example district distributed into user equipment (UE), and sends context acknowledgement message to serving GPRS support node SGSN.

It should be noted that, for embodiment of the method, for simple description, therefore it all is expressed as to a series of combination of actions, but those skilled in the art should know, the application is not subjected to the restriction of described sequence of movement, because according to the application, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and related action might not be that the application is necessary.

With reference to Fig. 6, show the structured flowchart of the processing unit embodiment of cell pingpong reselection between a kind of TD-SCDMA of the present invention and TD-LTE, specifically can comprise as lower module:

Be positioned at the context request message sending module 301 of mobile management entity MME, for when user equipment (UE) being detected and return the TD-LTE network from its TD-SCDMA network reselection of registering, send context request message to serving GPRS support node SGSN;

Be positioned at the context response information receiver module 302 of mobile management entity MME, the context response information of returning for described context request message be used to receiving described serving GPRS support node SGSN;

Be positioned at the session deletion request message sending module 303 of mobile management entity MME, for according to described context response information when local resource finds contextual information that described user equipment (UE) is corresponding and beared information, to gateway SGW, send request the session deletion request message of deleting described contextual information and beared information;

Response message receiver module 304 is deleted in the session that is positioned at mobile management entity MME, for when receiving described gateway SGW and return to the session of agree deleting described contextual information and beared information and delete response message for described session deletion request message, delete corresponding contextual information and the beared information of user equipment (UE) described in local resource;

In a preferred embodiment of the present invention, the described context response information that is arranged in mobile management entity MME can comprise international mobile subscriber identity IMSI, and the described session that is positioned at mobile management entity MME is deleted response message receiver module 304 and can be comprised:

Be positioned at the context acknowledgement message sending module 305 of mobile management entity MME, after preserving described context response information, return to context acknowledgement message to described serving GPRS support node SGSN.

In a preferred embodiment of the present invention, described device can also comprise:

Be positioned at the timer stopping modular of mobile management entity MME, for when receiving session that described gateway SGW returns for described session deletion request message and delete response message, stop described timer T.

Be positioned at the information deletion module of mobile management entity MME, for when surpassing described timer T and in the default time period, not receiving session that described gateway SGW returns for described session deletion request message and delete response message, stop described timer T, and delete corresponding contextual information and the beared information of user equipment (UE) described in local resource.

In a preferred embodiment of the present invention, when described user equipment (UE) detects quality in the TD-LTE network higher than the quality of TD-SCDMA network, can adopt the Tracking Area Identifier RAI of described TD-SCDMA network and described grouping temporary mobile subscriber identity P-TMSI to remap and generate subscriber equipment temporary mark GUTI, trigger the tracking area update request.

For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part gets final product referring to the part explanation of embodiment of the method.

Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.

Those skilled in the art should understand, the application's embodiment can be provided as method, device or computer program.Therefore, the application can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the application can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.

The application describes with reference to flow chart and/or the block diagram of method, equipment (system) and computer program according to the embodiment of the present application.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction be stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step to produce computer implemented processing, thereby in the instruction of carrying out on computer or other programmable devices, be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

Although described the application's preferred embodiment, in a single day those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the application's scope.

Finally, also it should be noted that, in this article, relational terms such as the first and second grades only is used for an entity or operation are separated with another entity or operating space, and not necessarily requires or imply between these entities or operation the relation of any this reality or sequentially of existing.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, article or the equipment that comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.

Above processing method and device to cell pingpong reselection between a kind of TD-SCDMA network provided by the present invention and TD-LTE network, be described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just be used to helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1. the processing method of cell pingpong reselection between a TD-SCDMA and TD-LTE, is characterized in that, comprising:

2. method according to claim 1, it is characterized in that, described context response information comprises international mobile subscriber identity IMSI, and described mobile management entity MME searches according to described context response information contextual information and the beared information that described user equipment (UE) is corresponding by following sub-step in local resource:

3. method according to claim 1 and 2, is characterized in that, also comprises:

And,

4. method according to claim 3, is characterized in that, also comprises:

5. method according to claim 1, it is characterized in that, described, when mobile management entity MME detects user equipment (UE) and returns the TD-LTE network from its TD-SCDMA network reselection of registering, before to serving GPRS support node SGSN, sending the step of context request message, also comprise:

6. method according to claim 1 or 5, it is characterized in that, when described user equipment (UE) detects quality in the TD-LTE network higher than the quality of TD-SCDMA network, adopt the Tracking Area Identifier RAI of described TD-SCDMA network and described grouping temporary mobile subscriber identity P-TMSI to remap and generate subscriber equipment temporary mark GUTI, trigger the tracking area update request.

7. the processing unit of cell pingpong reselection between a TD-SCDMA and TD-LTE, is characterized in that, comprising:

The response message receiver module is deleted in the session that is positioned at mobile management entity MME, while for receiving described gateway SGW, returning to for described session deletion request message the session deletion response message of agreeing the described contextual information of deletion and beared information, delete corresponding contextual information and the beared information of user equipment (UE) described in local resource;

8. device according to claim 7, it is characterized in that, the described context response information that is arranged in mobile management entity MME comprises international mobile subscriber identity IMSI, and the described session that is positioned at mobile management entity MME is deleted the response message receiver module and comprised:

9. according to the described device of claim 7 or 8, it is characterized in that, also comprise:

The timer that is positioned at mobile management entity MME starts module, after to gateway SGW, sending the session deletion request message, starts timer T;

Be positioned at the timer stopping modular of mobile management entity MME, for the session that described session deletion request message returns, delete response message be used to receiving described gateway SGW, stop described timer T.

10. device according to claim 8, is characterized in that, also comprises:

11. device according to claim 7, is characterized in that, also comprises:

12. according to the described device of claim 7 or 11, it is characterized in that, when described user equipment (UE) detects quality in the TD-LTE network higher than the quality of TD-SCDMA network, adopt the Tracking Area Identifier RAI of described TD-SCDMA network and described grouping temporary mobile subscriber identity P-TMSI to remap and generate subscriber equipment temporary mark GUTI, trigger the tracking area update request.