CN102045687B

CN102045687B - Method and system for establishing association relationship of combined nodes

Info

Publication number: CN102045687B
Application number: CN200910236034.XA
Authority: CN
Inventors: 胡英; 宗在峰; 梁爽
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-10-16
Filing date: 2009-10-16
Publication date: 2014-09-10
Anticipated expiration: 2029-10-16
Also published as: CN102045687A

Abstract

The invention provides a method and a system for establishing an association relationship of combined nodes. The method comprises the following steps of: when the association relationship is established among the combined nodes, sending information of a first network element and/or information of a second network element to a service network element; and selectively storing the received information through the service network element, wherein the stored information is used as association information for storage. Through the scheme of the invention, one-time position update and interaction process is canceled and reduced, so the interactive signaling between the combo nodes and a mobile switching center/visitor location register (MSC/VLR) is reduced, and the processing speed of the corresponding flow is quickened; and under the condition that the MSC/VLR can support and store two kinds of association information, a serving GPRS support node (SGSN) does not need to activate the idle mode signaling reduction (ISR) function so as to reduce the signaling load when user equipment (UE) returns to an evolved packet system (EPS) network to initiate united update.

Description

A kind of combined joint is set up the method and system of incidence relation

Technical field

The present invention relates to access technology, espespecially a kind of combined joint is set up the method and system of incidence relation.

Background technology

At present, the mobile network who is runing is mainly global system for mobile communications (GSM, Global Systemfor Mobile Communication)/universal mobile telecommunications system (UMTS, Universal MobileTelecommunication System) network, GSM/UMTS network is divided into circuit switching (CS, CircuitSwitching) territory and packet switching (PS, Packet Switching) territory.

For the higher object such as transmission rate, shorter transmission delay can be provided, third generation partner program (3GPP, 3rd Generation Partnership Project) standardization effort group be just devoted to the evolution of research to UMTS network PS field, the mobile communication system of this evolution is called as the grouping domain system (EPS of evolution, Evolved Packet System), EPS network only has PS territory.

Fig. 1 is existing GSM/UMTS and EPS network and the schematic diagram of the relevant herein network architecture, as shown in Figure 1, comprising:

Travelling carriage (MS, Mobile Station)/subscriber equipment (UE, User Equipment) 101, in this article, the unified UE of use of MS/UE represents, also referred to as terminal.UE can be user hand held mobile phone, palmtop PC (PDA, Personal Digital Assistance), have notebook computer or the machine etc. of data card.

Node (the eNodeB of evolution, Evolved NodeB) 102, the wireless access network (E-UTRAN of evolution, Evolved Universal Mobile Telecommunication System Radio AccessNetwork) in the network element that comprises, for the access of terminal provides Radio Resource.E-UTRAN is the wireless access network of EPS network.

Mobility Management Entity (MME, Mobility Management Entity) 103, it is a chain of command entity of EPS network, the server of interim storage user data, be in charge of and store UE context, such as UE/ user ID, mobility management states, user security parameters etc., it is user assignment temporary mark.

Basis station system (BSS, Basic Station System)/RNS (RNS, RadioNetwork Subsystem) 104 is wireless access networks of GSM/UMTS network.

GPRS serving GPRS support node (SGSN, Serving GPRS Support Node) 105, is the control network element of GSM/UMTS network PS field, records the positional information of UE, is responsible for carrying out the work such as mobile management.

Due to the function class of MME and SGSN seemingly, be all mobile management node, and have casual user's database, therefore, in network evolution process, there is a kind of special joint, combo node (also referred to as combined joint, or association node) 106.Combo node is integrated with the function of SGSN and MME, and the interface between two network elements of SGSN and MME is internal interface, and the mode by inside story or shared drive between the MME comprising in combo node and SGSN is carried out message communication.This combined joint network design is simple, and can reduce Signalling exchange time delay between network element, and some operator can adopt in this way in the time disposing EPS system.In the time that network using combined joint is disposed, if UE initiates registration in a wireless access system, and selected this combined joint, in the time that UE moves to another one wireless access system, in the situation that service range is possible, require to select same combined joint afterwards.

(the MSC of mobile switching centre, Mobile Switching Center)/VLR Visitor Location Register (VLR, Visitor Location Register) 107, be the control network element in GSM/UMTS network C S territory, be responsible for the mobile management of UE and call out the functions such as control.This MSC/VLR can be also the new functional entity MSC Server/VLR after the 3GPP R4 stage, and unification represents with MSC/VLR in this article.

At GSM/UMTS network, UE can be respectively linked into MSC/VLR and SGSN and carries out the attachment update in CS territory and PS territory by BSS/RNS.The mode that UE carries out respectively CS territory and PS territory attachment update need to take respectively Radio Resource and carry out Signalling exchange, for this reason, between MSC/VLR and SGSN, introduces Gs interface.Gs interface completes and between MSC/VLR and SGSN, sets up Gs incidence relation, in SGSN, preserves MSC/VLR number, preserves SGSN number in MSC/VLR, and is setting up the functions such as the UE by SGSN calling called subscriber of MSC/VLR after Gs incidence relation.

Gs incidence relation is to upgrade (RAU, Routing Area Update) and location area updating (LAU, Location Area Update) foundation by joint route district.Joint route area/location is upgraded, be exactly that UE is while carrying out Routing Area Update in PS territory, UE carries an associated update mark in Routing Area Update message, SGSN receives this message, carry out the Routing Area Update of this UE, and send location update message to MSC/VLR, wherein carry SGSN number.MSC/VLR receives the location update message that SGSN sends, and carries out the position updating process in the CS territory of UE, and sets up incidence relation by preserving SGSN number and SGSN.In the time that joint route area/location has been upgraded, between SGSN and MSC/VLR, just set up Gs incidence relation, UE completes respectively attachment update in PS territory and CS territory.

When setting up after Gs incidence relation, MSC/VLR realizes the paging of CS business by SGSN.For example, the user under UE is called out by the user of present networks or other network as called subscriber, and in the time carrying out exhaling end, MSC/VLR sends CS paging request message by Gs interface to SGSN.SGSN receives the backward BSS/RNS of CS paging request message and initiates CS paging, and CS service paging is delivered to UE.

What Gs interface adopted is Base Station System Application Part+, physically based on E1 interface or IP interface.Protocol stack is divided into two kinds, and one is based on arrowband SS7 signaling load mode, adopts BSSAP+/SCCP/MTP3/MTP2, and one is based on SIGTRAN signaling load mode, adopts BSSAP+/SCCP/M3UA/SCTP/IP.Wherein, signaling connection control protocol (SCCP, SignalingConnection Control Part) is a part of SS7.MSC/VLR and SGSN use the Gs incidence relation (namely the other side's number) of wherein preserving to carry out addressing as global title (GT, Global Title).

In EPS network, for solution is never disposed Internet protocol (IP, Internet Protocol) IP multimedia subsystem, IMS (IMS, IP Multimedia Subsystem) in the situation of network, user can initiation and the business such as receipt of call, short message in the time of EPS network insertion for UE, 3GPP has developed circuit domain dropping (CSFB, CS Fallback) technology.

In CSFB technology, introduce SGs interface between MME and MSC/VLR, SGs and Gs interface function and principle are similar.In the time of UE access EPS network, UE carries out CSFB and adheres to (EPS and CS network attachment) or associating tracing section updating (TAU, Tracking Area Update) and LAU, MME sends location update request message to MSC/VLR, wherein carry the IP address of MME, when concrete enforcement, can be also the universe name (FQDN of MME, Fully Qualified Domain Name) etc. mode, the unified representative of the IP address mode with MME in this article, MSC/VLR receives the location update message that MME sends, carry out CS position updating process, and set up incidence relation by preserving between MME address and MME, adhere to or combine tracking area/location area updating while completing at CSFB, between MME and MSC/VLR, set up SGs incidence relation and (in MME, preserved MSC/VLR number, in MSC/VLR, preserve the IP address information of MME), UE completes respectively and adheres to/upgrade in EPS network and GSM/UMTS network C S territory.

After setting up SGs association, when carrying out CS business while exhaling eventually as voice, MSC/VLR receives calling, sends CS beep-page message by SGs interface to MME, and MME receives after CS beep-page message, by E-UTRAN, CS paging is sent to UE.

What SGs interface adopted is SGsAP agreement, and protocol stack is SGsAP/SCTP/IP.SCTP (SCTP, Stream Control Transmission Protocol) be a kind of SCTP towards multimedia communication being proposed by the signalling working group (SIGTRAN) of IEFT, for transmit pstn signaling message, i.e. usually said SS7over IP in IP network.That SCTP provides is connection-oriented, the transmitting of point-to-point, has the function such as powerful congestion control, data-bag lost discovery.

In prior art, specify, at synchronization, a corresponding UE only preserves a Gs association or SGs related information in MSC/VLR, and in associating RAU/LAU process in order to ensure that the follow-up EPS of the retracting network of UE can rebuild SGs association and need signaling reduction under deexcitation idle pulley (ISR, Idle modeSignaling Reduction).

Below in conjunction with the flow process shown in Fig. 2 and Fig. 3, prior art is described.In this article, serve the EPS network of the current access of UE and GSM/UMTS network area taking MSC/VLR and prior art and technical scheme of the present invention and embodiment are described as example.

Fig. 2 is that in prior art, UE first combines and adheres to/upgrade at GSM/UMTS network, then carries out the flow chart of associated update at EPS network, as shown in Figure 2, comprising:

UE, from GSM/UMTS network insertion, carries out the following adhere to/renewal process of combining:

Step 200:UE initiates to combine to adhere to SGSN by BSS/RNS, or joint route area/location update request message.

Step 201:SGSN carries out this UE and adheres to/upgrade handling process at GSM/UMTS network PS field, and find corresponding MSC/VLR according to the current positional information of UE, send position updating request to this MSC/VLR, in this location update request message, carry SGSN number.

The CS that step 202:MSC/VLR carries out this UE upgrades register flow path, after having registered, responds to SGSN home position update request.

Step 203:SGSN returns and combines adhere to/update request response message to UE.

By step 200～step 203, complete the combined registering of UE at SGSN, MSC/VLR, between SGSN and MSC/VLR, set up Gs association, Gs interface activates, and what in MSC/VLR, preserve is SGSN number.

Follow-up, when UE moves to E-UTRAN, while access from E-UTRAN, carry out following associating TAU/LAU process:

Step 204:UE sends associating TAU/LAU request to MME.

The information that step 205:MME carries according to UE finds the SGSN of original registration, obtains UE context from SGSN.If SGSN and MME support ISR function, in this process, between SGSN and MME, set up ISR incidence relation, ISR function activation.

Step 206:MME, according to the information of carrying in associating TAU/LAU request message, finds corresponding MSC/VLR, and sends location update request message to this MSC/VLR, initiates CS register update process, the IP address of carrying MME in message.

Step 207:MSC/VLR receives the location update request message that MME sends, and deletes the SGSN number of wherein preserving, and preserves the IP address of MME, completes after CS register update process, upgrades response message to MME home position.

Step 208:MME completes after renewal, returns to associating TAU/LAU request response to UE, carries the mark that ISR activates in this message, and UE receives response message, preserves relevant information and ISR function activation mark is wherein set.

By step 204～step 208, complete the register update of UE at MME and MSC/VLR, activate ISR function, between MSC/VLR and MME, set up SGs incidence relation, SGs interface activates, and Gs incidence relation is deleted, Gs interface does not activate, and what in MSC/VLR, preserve is the IP address of MME.

Fig. 3 is that in prior art, UE first combines and adheres to/upgrade at EPS network, then carries out the flow chart of associated update at GSM/UMTS network, as shown in Figure 3.Except in associating RAU/LAU process, ISR function does not activate, shown in its flow process and Fig. 2, flow process is similar, is roughly described below:

UE is from E-UTRAN network insertion, carries out that following CSFB adheres to or associated update process:

Step 300:UE sends CSFB to MME and adheres to or combine TAU/LAU request.

Step 301:MME carry out UE EPS network adhere to/upgrade processing, and to MSC/VLR launch position update request process, MME is carried at self IP address in location update request message, to send to MSC/VLR.

Step 302:MSC/VLR carries out the CS register update process of UE, preserves the IP address of MME, completes after CS register update process, to MME home position update request response message.

Step 303:MME returns to CSFB to UE and adheres to or combine TAU/LAU request response.

By step 300～step 303, complete the registration of UE at MME and MSC, between MSC/VLR and MME, set up SGs incidence relation, SGs interface activates, and what in MSC/VLR, preserve is the IP address of MME.

Follow-up, in the time that UE moves to GSM/UMTS network insertion, combine RAU/LAU process:

Step 304:UE sends RAU/LAU request message by BSS/RNS to SGSN.

The information that step 305:SGSN carries according to UE finds the MME of original registration, and obtains UE context from MME.In order to ensure that follow-up UE retracts EUTRAN when chartered region, can initiate associating TAU/LAU process and rebuild SGs association, SGSN, in (being that SGs is associated exists) the situation deactivating ISR function that judges that CSFB function has activated, notifies MME by this information in context response information.

Step 306:SGSN by the local number portability of self in location update request message and send to MSC/VLR.

Step 307:MSC/VLR receives the location update request message that SGSN sends, and deletes the IP address of the MME wherein preserving, preserves SGSN number, completes after CS register update process, to SGSN home position update request response message.

Step 308:SGSN returns to associating RAU/LAU request response to UE.In this message, do not carry ISR activation tagging, UE receives this message, and preservation relevant information the ISR function activation arranging are wherein masked as ISR deexcitation.

Fig. 2 and Fig. 3 are MME and SGSN as in network element situation independently, and the method for incidence relation is set up in existing realization.As the introducing of the combo node of MME/SGSN, be in the time that UE carries out renewal process, reduce the signaling informations such as the context that transmits between MME and SGSN and the signaling traffic load that brings to the position updating process of HSS etc.

In prior art, for the incidence relation of how setting up between combo node and MSC/VLR, and related signaling process etc. not yet provides specific implementation.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of combined joint to set up the method for incidence relation, and can realize between combo node and MSC/VLR and set up incidence relation, and related signaling process.

Another object of the present invention is to provide a kind of combined joint to set up the system of incidence relation, can realize between combo node and MSC/VLR and set up incidence relation, and related signaling process.

For achieving the above object, technical scheme of the present invention is achieved in that

Combined joint is set up a method for incidence relation, comprising:

In the time that combined joint is set up incidence relation, the information of the first network element and/or the information of the second network element of composition self are sent to business network element;

Business network element selects to preserve the information receiving, and using the information of preserving as related information saving.

Business network element selects to preserve the information receiving:

In the time that described business network element is preserved simultaneously, preserve the information of the first network element and/or the information of the second network element that receive;

In the time that described business network element is preserved one of them information, preserve the information of the first network element or the information of the second network element that receive.

Described the first network element is the core network element of the first wireless access system, and the second network element is the core network element of the second wireless access system.

The core network element of described the first wireless access system be Mobility Management Entity MME and GPRS serving GPRS support node SGSN one of them, the core network element of described the second wireless access system is wherein another of MME and SGSN;

Described business network element is moving exchanging center MSC/VLR Visitor Location Register VLR.

The information of described the first network element is an information in IP address and the SGSN number of MME; The information of described the second network element is another information in IP address and the SGSN number of MME.

The method also comprises: described business network element returns to current related information to combined joint; Or,

All support two kinds of interfaces and can preserve this two kinds of related informations simultaneously by setting in advance or dispose guarantee business network element all and that described combined joint is associated; Or,

By configuration mode, described combined joint knows that can the business network element being associated support to preserve two kinds of incidence relation information simultaneously.

In the time that described combined joint transmission updating message is set up incidence relation, also comprise and carry the preferential information of the preferential still number in instruction IP address to business network element.

Combined joint is set up a system for incidence relation, at least comprises combined joint and business network element, wherein,

Combined joint, in the time setting up incidence relation, sends to business network element by the information of the first network element and/or the information of the second network element of composition self;

Business network element, for selecting to preserve the information receiving, and using the information of preserving as related information saving.

Described business network element also for, return to current related information to combined joint.

Described business network element also for, select wherein a kind ofly to carry out alternately with combined network elements according to the related information of wherein preserving.

Described the first network element is the core network element of the first wireless access system, and described the second network element is the core network element of the second wireless access system.

The technical scheme providing from the invention described above can find out, when being included in combined joint and setting up incidence relation, the information of the first network element and/or the information of the second network element of composition self sent to business network element; Business network element selects to preserve the information receiving, and using the information of preserving as related information saving.Pass through the present invention program, in the situation that combined joint knows that business network element has been preserved two kinds of related informations and MSC/VLR and do not changed with combined joint as MSC/VLR, it is follow-up in the time that UE accesses, combined joint can not carry out position with MSC/VLR and upgrade reciprocal process, omit and reduced by a position and upgraded reciprocal process, thereby reduce the mutual signaling between combo node and MSC/VLR, accelerated the processing speed of corresponding flow process; In the situation that MSC/VLR can support and preserve two kinds of related informations, can not deexcitation ISR function for combined joint, unlike in prior art in RAU process in order to rebuild SGs association, if judgement CSFB function activated SGSN must deexcitation ISR function.And adopt technology of the present invention, SGSN not to need deexcitation ISR function, retract thereby reduced UE the signaling traffic load that EPS network initiation associated update brings.

Brief description of the drawings

Fig. 1 be in existing GSM/UMTS and EPS network to relevant herein network architecture schematic diagram;

Fig. 2 is that in prior art, UE first combines and adheres to/upgrade at GSM/UMTS network, then carries out the flow chart of associated update at EPS network;

Fig. 3 is that in prior art, UE first combines and adheres to/upgrade at EPS network, then carries out the flow chart of associated update at GSM/UMTS network;

Fig. 4 is the method schematic diagram that combined joint of the present invention is set up incidence relation;

Fig. 5 is that UE of the present invention first combines and adheres to/upgrade at GSM/UMTS network, then carries out the flow chart of the embodiment under the scene of associated update at EPS network;

Fig. 6 is that UE of the present invention first combines and adheres to/upgrade at EPS network, then carries out the flow chart of the embodiment under the scene of associated update at GSM/UMTS network.

Fig. 7 is that the present invention only supports Gs interface at combined joint, and UE first combines and adheres to/upgrade at EPS network, then carries out the flow chart of the embodiment under the scene of associated update at GSM/UMTS network.

Fig. 8 is that the present invention only supports SGs interface at combined joint, and UE first combines and adheres to/upgrade at GSM/UMTS network, then carries out the flow chart of the embodiment under the scene of associated update at EPS network.

Embodiment

Fig. 4 is the method schematic diagram that combined joint of the present invention is set up incidence relation, as shown in Figure 4, comprising:

Step 400: in the time that combined joint is set up incidence relation, the information of the first network element and/or the information of the second network element of composition self are sent to business network element.

Wherein, the first network element is the core network element of the first wireless access system, and the second network element is the core network element of the second wireless access system.One of them is the core network element of the first wireless access system for MME and SGSN, and another is the core network element of the second wireless access system.Now, business network element refers to MSC/VLR.

If MME is the core network element of the first wireless access system, so, the information of the first network element is the IP address of MME; If SGSN is the core network element of the second wireless access system, so, the information of the second network element is SGSN number.

If SGSN is the core network element of the first wireless access system, so, the information of the first network element is SGSN number; If MME is the core network element of the second wireless access system, so, the information of the second network element is the IP address of MME.

Step 401: business network element is preserved the information receiving, and using the information of preserving as related information saving.

Wherein, business network element can be to preserve according to selections such as the abilities of self information receiving.The ability of business network element refers to that business network element can preserve number and the IP address of combined joint simultaneously, or can only preserve an information in number or the IP address of combined joint.Specifically be exactly, MSC/VLR can preserve SGSN number that combined joint provides and the IP address of MME simultaneously, or can only preserve one of SGSN number that combined joint provides or IP address of MME.

Can further include step 402: business network element returns to current related information to combined joint.In the situation that combined joint needs, receive the business network element of setting up incidence relation request and feed back current related information to combined network elements, which kind of incidence relation is this information can know according to and initiate reciprocal process or other situation is used for follow-up reciprocal process combined joint.In addition, in the time that follow-up and combined network elements carry out business alternately, receive the business network element of setting up incidence relation request and select wherein a kind ofly to carry out alternately with combined network elements according to the related information of wherein preserving.

For the inventive method, the system that also provides a kind of combined joint to set up incidence relation, at least comprises combined joint and business network element, wherein,

Combined joint, in the time setting up incidence relation, sends to business network element by the information of the first network element and/or the information of the second network element of composition self.

Business network element, for preserving the information receiving, and using the information of preserving as related information saving.Wherein, further, comprise according to the ability of self and select to preserve the information receiving.

Wherein, the first network element is the core network element of the first wireless access system, and the second network element is the core network element of the second wireless access system.One of them is the core network element of the first wireless access system for MME and SGSN, and another is the core network element of the second wireless access system.

Business network element is MSC/VLR.

Below in conjunction with embodiment, the present invention program is described in detail.

Fig. 5 and Fig. 6 are two embodiment of the present invention, in the embodiment shown in Fig. 5 and Fig. 6, suppose that combo node is supported in number and the IP address of in the location update request message that sends to MSC/VLR, carrying combo node, MSC/VLR supports the IP address of simultaneously preserving SGSN number and MME.Combo node carries the IP address of this node and number to MSC/VLR in the time setting up incidence relation with MSC/VLR; MSC/VLR receives the location update request message that combo node sends, preserve IP address and the number of this node, follow-up with this combo node mutual (such as, send CS beep-page message to combo node) time, MSC/VLR sends paging to combo node can be undertaken by SGsAP mode or BSSAP+ mode.

Fig. 5 is that UE of the present invention first combines and adheres to/upgrade at GSM/UMTS network, then carries out the flow chart of the embodiment under the scene of associated update at EPS network, as shown in Figure 5, comprising:

Step 500:UE by BSS/RNS send combine adhere to or joint route area/location update request message to the SGSN in combo node.

SGSN in step 501:combo node carries out this UE and adheres to/upgrade handling process at GSM/UMTS network PS field, and find corresponding MSC/VLR according to the current positional information of UE, send position updating request to this MSC/VLR, in this position updating request, carry the IP address (being the IP address of MME) of number (being SGSN number) and the combo node of combo node.

Step 502:MSC/VLR preserves the number of combo node and the IP address of combo node, completes after the CS register update flow process of this UE, and MSC/VLR responds to the SGSN home position update request in combo node.

Further, number and the IP address of can instruct MS C/VLR in this position updating request response message whether having preserved this combo node, for the SGSN of combo node set up after incidence relation initiatively to MSC/VLR send message situation and as shown below when the MME in combo node receives associated update message the basis for estimation to MSC/VLR transmission position renewal etc. whether.

If ensure that by setting in advance or disposing all MSC/VLR that are associated with combined joint support two kinds of interfaces and can preserve this two kinds of related informations simultaneously, MSC/VLR also can not indicate this information in position updating request response message.Or by configuration mode, combined joint can know that can the MSC/VLR being associated support to preserve two kinds of incidence relation information simultaneously, now, MSC/VLR also can not indicate this information in position updating request response message.

SGSN in step 503:combo node returns and combines adhere to/update request response message to UE.

By step 500～step 503, complete the SGSN of UE in combo node and the combined registering of MSC/VLR, between combo node and MSC/VLR, set up Gs association and SGs incidence relation, Gs interface and SGs interface activate, the IP address of having preserved SGSN number and MME in MSC/VLR.

Step 504:UE initiates associating TAU/LAU process, and MME receives associating TAU/LAU request message.

Suppose that this combo node, still for the EPS network area service of the current access of UE, completes UE contextual information by inside story or shared drive mode between the MME in combo node and SGSN mutual.In this process, ISR function activation.

MME is according to the information of carrying in associating TAU/LAU request message, find corresponding MSC/VLR, because UE registers at this MSC/VLR, and MSC/VLR has preserved the IP address of the MME in combo node, and between MME, set up incidence relation, MME does not initiate the position update flow to MSC/VLR.

MME in step 505:combo node completes UE after the renewal of EPS network, return to associating TAU/LAU request response to UE, wherein comprise ISR and activate instruction, UE receives response message and preserves relevant information, and the ISR function activation arranging is wherein masked as ISR activation.

So far, completed the MME of UE in combo node and the registration of SGSN, and UE is in the registration of MSC, activates ISR function, the IP address of having preserved SGSN number and the MME of combo node in MSC/VLR, has preserved Gs and SGs related information in MSC/VLR.

If MSC/VLR can not support to preserve number and the IP address of combo node simultaneously, so when the MME in combo node receives associated update request message, need to carry out position and upgrade reciprocal process between MSC/VLR, similar in specific implementation flow process and prior art, those skilled in the art are easy to obtain, and repeat no more here.

Fig. 6 is that UE of the present invention first combines and adheres to/upgrade at EPS network, then carries out the flow chart of the embodiment under the scene of associated update at GSM/UMTS network, as shown in Figure 6, comprising:

Step 600:UE sends CSFB by eNodeB to the MME in combo node and adheres to or combine TAU/LAU request message.

The information of carrying in adhere to according to combining/update request of step 601:MME message, find corresponding MSC/VLR, MME sends location update request message to MSC/VLR, carries the IP address (being the IP address of MME) of combo node and the number (being SGSN number) of combo node in this location update request message.

Step 602:MSC/VLR preserves the IP address of combo node and the number of combo node, and the CS that completes this UE upgrades after register flow path, and MSC/VLR responds to the MME home position update request in combo node.

Further, IP address and/or the number of this combo node can instruct MS C/VLR in the response of this position updating request whether have been preserved.Step 502 in similar Fig. 5 herein, those skilled in the art are easy to obtain, and repeat no more here.

MME in step 603:combo node completes UE after the adhering to/upgrade of EPS network, and returns to CSFB adhere to or combine TAU/LAU request response to UE.

By step 600～step 603, complete the MME of UE in combo node and the combined registering of MSC, in MSC/VLR, preserve the IP address of MME of combo node and the number of SGSN, in MSC/VLR, preserve SGs and Gs related information.

Step 604:UE sends joint route area/location updating message to the SGSN in combo node by BSS/RNS.

Suppose that this combo node, still for the GSM/UMTS network area service of the current access of UE, completes UE contextual information by inside story or shared drive mode between the SGSN in combo node and MME mutual.And because can preserve SGs and Gs incidence relation between combo node and MSC/VLR simultaneously, when UE retracts the registered region of EUTRAN, do not need to initiate associating TAU/LAU process and rebuild SGs association, so in this process, SGSN activates ISR function.

SGSN in step 605:combo node carries out the renewal handling process of this UE at GSM/UMTS network PS field, and finds corresponding MSC/VLR according to the current positional information of UE.

Because in the prior art, the LAI information of carrying in the location update request message that in step 601, MME sends to MSC/VLR may be not accurate enough, and SGSN can be known location area information accurately according to current Route Area information, therefore, in this step, preferably, SGSN can be that SGSN is according to the new LAI information obtaining of Route Area information by upgrade the LAI information of the UE preserving in MSC/VLR to MSC/VLR transmission location update request message.

It should be noted that, while specifically enforcement, SGSN also can not initiate the position update flow to MSC/VLR because UE this MSC/VLR registered and combo node in SGSN and between MSC/VLR, set up incidence relation.

Step 606:MSC/VLR carries out the more new technological process of CS of this UE, is mainly to upgrade LAI information, afterwards to the SGSN home position update request response in combo node.

SGSN in step 607:combo node returns to associating RAU/LAU request to UE and responds, and wherein comprises ISR and activates instruction, and UE receives response message and preserves relevant information, and the ISR function activation arranging is wherein masked as ISR activation.

So far, complete the MME of UE in combo node and the combined registering of SGSN and MSC/VLR, set up SGs incidence relation associated with Gs between combo node and MSC/VLR, SGs interface and Gs activate, what in MSC/VLR, preserve is IP address and the SGSN number of MME, activates ISR function.

In flow process shown in Fig. 5 and Fig. 6, between MSC/VLR and combo node, set up SGs associated with Gs after, when MSC/VLR carries out CS business, need to be mutual with this combined joint time, MSC/VLR is according to the related information of wherein preserving, and just can select to carry out alternately based on the SGsAP mode IP address of node (use combo) or BSSAP+ mode (number of use combo node) mode and combined joint.

Wherein, in the time selecting, MSC/VLR can according to the signaling situation of two kinds of modes (such as, whether break-make of signaling, signaling traffic load), or according to traffic type information, and combinations thereof situation is selected, can realize like this load balancing, and MSC/VLR can be undertaken alternately by BSSAP+ mode according to SGSN number and the MME of the combo node of wherein preserving, thereby make in the reciprocal process of MME in combo node and MSC/VLR, realize the making full use of of the resource of having disposed (such as, in the time introducing CSFB, the MME of combo node can utilize the resource of having disposed between SGSN and MSC/VLR to carry out alternately with MSC/VLR), can solve again situations such as occurring signaling congestion and cause the problem occurring, and signaling disconnection (such as, in the situation that IP mode cannot be used, can utilize the transmission based on MTP) situation.

And can find out that from the flow process shown in Fig. 5, Fig. 6 and description thereof the beneficial effect that the inventive method is also brought is:

In the situation that combined joint knows that MSC/VLR has preserved two kinds of related informations and MSC/VLR and do not change with combined joint, it is follow-up in the time that UE accesses, combined joint can not carry out position with MSC/VLR and upgrade reciprocal process, thereby omit and reduced position updating process one time, reduce the mutual signaling between combo node and MSC/VLR, accelerated the processing speed of corresponding flow process.

In the situation that MSC/VLR can support and preserve two kinds of related informations, can not deexcitation ISR function for combined joint, unlike in prior art in RAU process in order to rebuild SGs association, if judgement CSFB function activated SGSN must deexcitation ISR function.And adopt technology of the present invention, SGSN not to need deexcitation ISR function, thereby having reduced UE retracts EPS network and initiates signaling traffic load that associated update brings etc., can fully obtain the beneficial effect that ISR technology is brought.

Further, in the time of the invention process, in the time that combined joint sends location update message to MSC/VLR, not only carry the IP address of combo node and the number of combo node, can also further carry the preferential information of the preferential still number (BSSAP+ mode) in instruction IP address (SGsAP mode) to MSC/VLR.Like this, MSC/VLR preserves above-mentioned information for selecting when mutual with combo node.Flow process shown in its handling process and Fig. 5 and Fig. 6 is similar, and those skilled in the art are easy to draw, repeat no more here.

In addition, in the time of the invention process, MME in combo node or SGSN are in the time setting up incidence relation to MSC/VLR transmission location update message, can whether support SGsAP or BSSAP+ according to the MSC/VLR selecting, or all support for two kinds, the IP address of combo node is carried in selection, or the number of combo node one of them or two give MSC/VLR.Follow-up MSC/VLR selects one and combo node to carry out alternately according to the incidence relation of wherein preserving.Such as, in the time that the MME in combo node need to send location update message to MSC/VLR, if MME judges that according to information such as configurations MSC/VLR only supports BSSAP+ mode, MME carries out according to BSSAP+ mode in the time sending location update message so, and only carries the number of combo node to MSC/VLR.Flow process shown in its flow process and Fig. 5 and Fig. 6 is similar, and those skilled in the art are easy to draw, repeat no more here.

The present invention program can also be applied in the situation of only supporting Base Station System Application Part+ between combined joint and MSC/VLR, such as, in the time that CSFB function realizes and dispose, between MME and MSC/VLR, not yet support SGsAP agreement, at this moment can not realize audio call etc., MME in combined joint can utilize and between the Gs interface based on BSSAP+ between SGSN and the MSC/VLR in combined joint and MSC/VLR, sets up incidence relation and carry out business, thereby the business such as audio call can be realized.Fig. 7 is the present invention while being applied to above-mentioned scene, and UE first combines and adheres to/upgrade at EPS network, then carries out the schematic flow sheet of associated update at GSM/UMTS network.As shown in Figure 7, comprising:

Step 700:UE sends CSFB by eNodeB to the MME in combo node and adheres to or combine TAU/LAU request message.

The information of carrying in adhere to according to combining/update request of the MME in step 701:combo node message, find corresponding MSC/VLR, MME in combo node utilizes the Gs interface of combined joint to send location update request message to MSC/VLR, carries the number (being SGSN number) of combo node in this location update request message.

Step 702:MSC/VLR preserves the number of combo node, and the CS that completes this UE upgrades after register flow path, and MSC/VLR is to the response of combo node home position update request, and the MME in combo node obtains position updating request response message.

MME in step 703:combo node completes UE after the adhering to/upgrade of EPS network, and returns to CSFB adhere to or combine TAU/LAU request response to UE.

By step 700～step 703, complete the registration of the MME of UE in combo node, in the registration of MSC/VLR, in MSC/VLR, preserve the number of the SGSN of combo node, in MSC/VLR, preserve Gs related information.

After this, MSC/VLR just can utilize this incidence relation that the CS paging of the business such as audio call is sent to combined joint, thereby the MME in combo node can obtain this paging information, paging UE, thus voice call service can be completed.

Follow-up, in the time that UE moves to GSM/UMTS network insertion, combine in the process of RAU/LAU and Fig. 6 step 604～step 607 similar, those skilled in the art are easy to draw, repeat no more here.

The present invention is applied in the situation of only supporting Base Station System Application Part+ between combined joint and MSC/VLR, UE first combines and adheres to/upgrade at GSM/UMTS network, the flow process of carrying out associated update at EPS network is more only carried the number (SGSN number) of combo node except send to the location update message of MSC/VLR at combined joint in, other and Fig. 5 are similar, those skilled in the art are easy to draw, repeat no more here.

The present invention can also be applied in the situation of only supporting SGsAP between combined joint and MSC/VLR, because SGsAP and Base Station System Application Part+ function and principle are similar, make like this realization of combined joint relatively simplify, and thereby SGSN in combined joint utilizes the method can realize some functions, such as, the SGSN in combined joint can be based on transmitting content of short message between this realization and MSC/VLR.Fig. 8 is the present invention while being applied to above-mentioned scene, and UE first combines and adheres to/upgrade at GSM/UMTS network, then carries out the schematic flow sheet of associated update at EPS network.As shown in Figure 8, comprising:

Step 800:UE by BSS/RNS send combine adhere to or joint route area/location update request message to the SGSN in combo node.

SGSN in step 801:combo node carries out this UE and adheres to/upgrade handling process at GSM/UMTS network PS field, and find corresponding MSC/VLR according to the current positional information of UE, and utilize SGs interface to send position updating request to this MSC/VLR, in this position updating request, carry the IP address (being the IP address of MME) of combo node.

Step 802:MSC/VLR preserves the IP address of combo node, completes after the CS register update flow process of this UE, and MSC/VLR is to the response of combo node home position update request, and the SGSN in combo node obtains position updating request response.

SGSN in step 803:combo node returns and combines adhere to/update request response message to UE.

By step 800～step 803, complete the SGSN of UE in combo node and the combined registering of MSC/VLR, between combo node and MSC/VLR, set up SGs incidence relation, SGs interface activates, the IP address of having preserved the MME in combo node in MSC/VLR.

After this, MSC/VLR just can utilize this incidence relation that the CS paging of the business such as audio call is sent to combined joint, the SGSN in combo node according to obtain this paging information paging UE, thereby completed voice call service.And MSC/VLR can utilize this interface that content of short message is delivered to combined joint, make the SGSN in combo node can utilize the short message transfer mechanism between existing and UE to receive and dispatch short message.

Follow-up, when UE moves to E-UTRAN when access, combining the process of TAU/LAU and Fig. 5, to plant step 504～step 505 similar, and those skilled in the art are easy to draw, repeat no more here.

The present invention is applied in the situation of only supporting SGs interface between combined joint and MSC/VLR, UE first combines and adheres to/upgrade at GSM/UMTS network, the flow process of carrying out associated update at EPS network again except send to the location update message of MSC/VLR at combined joint in, only carry the IP address (the IP address of MME) of combo node other and Fig. 6 similar, those skilled in the art are easy to draw, repeat no more here.

In sum, utilize the present invention program, the function such as combined registering and paging that has not only ensured existing CSFB and GSM/UMTS network C S/PS normally realizes, and in the situation that can supporting transmit and preserve SGs and Gs incidence relation information, reduce position and upgraded reciprocal process, keep the ISR to activate in associating RAU/LAU process, reduced UE and retracted EPS network and need to upgrade the signaling brought etc., fully obtained the beneficial effect that ISR technology is brought.And make the MME in combo node can utilize the resource and the MSC/VLR that between SGSN and MSC/VLR, have disposed to communicate and realize business, improve resource utilization and increased deployment flexibility etc.

The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention, all any amendments of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.

Claims

1. combined joint is set up a method for incidence relation, it is characterized in that, comprising:

Business network element selects to preserve the information receiving, and using the information of preserving as related information saving;

Described the first network element is the core network element of the first wireless access system, and the second network element is the core network element of the second wireless access system;

Described business network element is moving exchanging center MSC/VLR Visitor Location Register VLR;

The information of described the first network element is an information in IP address and the SGSN number of MME; The information of described the second network element is another information in IP address and the SGSN number of MME;

2. method according to claim 1, is characterized in that, business network element is selected to preserve the information receiving and is:

3. method according to claim 1, is characterized in that, the method also comprises: described business network element returns to current related information to combined joint; Or,

4. combined joint is set up a system for incidence relation, it is characterized in that, at least comprises combined joint and business network element, wherein,

Business network element, for selecting to preserve the information receiving, and using the information of preserving as related information saving;

Described the first network element is the core network element of the first wireless access system, and described the second network element is the core network element of the second wireless access system;

5. system according to claim 4, is characterized in that, described business network element also for, return to current related information to combined joint.

6. system according to claim 4, is characterized in that, described business network element also for, select wherein a kind ofly to carry out alternately with combined network elements according to the related information of wherein preserving.