CN100420339C

CN100420339C - Method for realizing user call switching based on IU FLEX technique

Info

Publication number: CN100420339C
Application number: CNB2006100031518A
Authority: CN
Inventors: 陶传会
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-02-20
Filing date: 2006-02-20
Publication date: 2008-09-17
Anticipated expiration: 2026-02-20
Also published as: CN1867187A

Abstract

The present invention relates to a method for realizing user call switching based on IU FLEX techniques, which has the core that after an MSC receives the service request of a user, when the condition that the use data of the user can not be obtained in a VLR according to the identity marks of a TMSI and an IMSI of the user is confirmed, NRI value contained in the identity mark of the TMSI of the user is obtained. Matched NRI value is searched in an inner pool zone according to the obtained NRI value. When the condition that the matched NRI value is found is confirmed, a data restoration process is originated to the user. Therefore, switching rate when the user calls or is called can be enhanced through the data restoration process through the present invention to make shared characteristics among different CN nodes in an IUFLEX packet network have an opportunity to exert fully. In addition, the present invention enhances the successful rate of selecting a core network for the user through a reassigned TMSI in a subsequent call processing process which is carried out after the data restoration process succeeds. Consequently, the successful probability of the user to carry out service is large.

Description

Realize the method for user call proceeding based on IU FLEX technology

Technical field

The present invention relates to the communications field, relate in particular to the call proceeding that realizes the user based on IU FLEX technology.

Background technology

The agreement 3GPP TS 23.236 of 3GPP Release5 and 3GPP TS 25.331 have described the characteristic of IUFLEX technology, in this agreement, introduced POOL AREA (Chi Qu) notion, a POOL AREA represents one or more RAN (Radio Access Network, wireless access network) set of node service area, it is made up of a plurality of core net (CN) node (as MSC or SGSN node).

In the IU FLEX technology, a RNC (radio network controller) node is supported to connect in the territory of a plurality of different CN nodes, a RNC node can be routed to business information different CN node (as MSC or SGSN node) by connecting in the territory, thereby makes these CN nodes share traffics all in the district of pond.Can reduce renewal between the CN node, switching and reorientation like this, reduce the renewal flow of attaching position register (HLR).

Be illustrated in figure 1 as the group-network construction of a typical IU FLEX function.In this framework, there is a POOL AREA, this pond is made up of MSC (Mobile Switching Center, mobile switching centre) 1, MSC2 and MSC3.Under the situation of the normal operation of system, MSC1, MSC2 and MSC3 share the traffic (seeing agreement 3GPP TS 23 236) in this pond jointly.

The prior art relevant with the present invention, the flow process when being based on above-mentioned networking structure and carrying out customer call.

According to the description among the agreement 3GPP TS 24008, the user uses TMSI (TemporaryMobile Subscriber Identity, Temporary Mobile Subscriber Identity) makes a call as user ID, MSC receives CM SERVICE REQUEST (call management service request), if confirm that according to user ID TMSI this user is not this VLR (Visitor Location Register, VLR Visitor Location Register) user, then MSC initiates the identification flow process, MSC obtains this user's IMSI (International Mobile Subscriber Idetity, international mobile subscriber identity) after, find that this user is not this VLR user, then return CM SERVICE REJECT (call management service refusal) message, this call failure.Its handling process is as shown in Figure 2:

Step 1, UE (user) uses TMSI to make a call as user ID, and initial direct-sending message is dealt into RNC, and RNC sends to certain MSC with this CM SERVICE REQUEST message.

Step 2, after MSC received described CM SERVICE REQUEST message, the VLR of this MSC can not match the VLR user data according to user ID TMSI, and MSC initiates the user identity identification flow process then, send IDENTITY REQUEST to the user, get this user's IMSI; See agreement 3GPP TS24008.

Step 3, the user sends IDENTITY RESPONSE to MSC, and MSC obtains this user's IMSI.

Step 4, the VLR of MSC uses user's IMSI to search less than this IMSI corresponding user data, and MSC sends CM SERVICE REJECT to UE, and wherein the Reason For Denial value is #4 (IMSIunknown in VLR), sees agreement 3GPP TS 24 008.

Step 5, MSC discharges this calling.Be that MSC sends IU RELEASE COMMAND (IU release command) to RNC; Described RNC discharges after receiving this message, and after release is finished, sends IU RELEASE COMPLETE (IU discharges and finishes) message and give MSC.

When the user who is not this VLR initiates when called, when user's page-response message sent to MSC, MSC is dynamic subscriber's data of this user not, then discharge this calling, and this user does called failure.Its handling process is as shown in Figure 3:

Step 1, UE uses TMSI to carry out page response as user ID, and initial direct-sending message is dealt into RNC; RNC sends to certain MSC with this PAGING RESPONSE (page response) message.

Step 2, the VLR of this MSC can not match the VLR user data according to user ID TMSI, and MSC initiates the user identity identification flow process then, sends IDENTITY REQUEST (identification request) and gives UE, gets the IMSI of this UE.See agreement 3GPP TS 24008.

Step 3, the user sends I DENTITY RESPONSE (identification response) and gives MSC, and MSC obtains this user's IMSI.

Step 4, the VLR of MSC uses the user data of user's I MSI coupling less than VLR, and MSC discharges this calling.Be that MSC sends IU RELEASE COMMAND to RNC; Described RNC discharges after receiving this message, and after release is finished, sends IU RELEASE COMPLETE message to MSC.

By prior art as can be seen, when the user uses TMSI to call out, because this user's data not among this VLR, therefore the user does the caller meeting and leads to the failure, same user does and also can fail when called, thereby the characteristic that can share between the different CN nodes in the IU FLEX networking is not fully exerted.

Summary of the invention

The purpose of this invention is to provide a kind of method that realizes user call proceeding based on IU FLEX technology, by the present invention, in IU FLEX networking, can improve the user when doing caller or the user do call completing rate when called, therefore can make the characteristic that can share between the different CN nodes in the IU FLEX networking have an opportunity to be not fully exerted.

The objective of the invention is to be achieved through the following technical solutions:

The invention provides a kind of method based on IU FLEX technology realization user call proceeding, it comprises:

After A, moving exchanging center MSC are received service request from user, when confirming in VLR Visitor Location Register VLR, to get access to this user data of users according to user's Temporary Mobile Subscriber Identity TMSI and international mobile subscriber identity IMSI, then obtain the Internet resources identification code NRI value among this user's the Temporary Mobile Subscriber Identity TMSI;

B, in the pond district of described MSC correspondence, search the NRI value of coupling, and when confirming to find the NRI value that is complementary, then this user is initiated Data Recovery Process according to the described NRI value of obtaining, after data are recovered successfully, the execution subsequent voice calls.

Wherein, described steps A specifically comprises:

The service request that A1, MSC send according to the user gets access to described user's user ID TMSI;

A2, in VLR, search the user data of coupling, and when confirming to get access to the user data of coupling, initiate the identification flow process, and get access to described user's IMSI according to described identification flow process according to described TMSI;

A3, in VLR, search corresponding user data, and when confirming to get access to the user data of coupling, obtain the NRI value among this user's the Temporary Mobile Subscriber Identity TMSI according to the described IMSI that gets access to.

Wherein, described steps A 1 specifically comprises:

A11, user use TMSI to make a call as user ID or carry out page response, and send to described radio network controller (RNC) by initial direct-sending message;

A12, described RNC send to corresponding MSC with described message;

A13, described MSC get access to the user ID TMSI of described user's correspondence according to the described message that receives.

Wherein, described steps A 2 specifically comprises:

A21, MSC search the user data of coupling according to described TMSI in VLR, if can get access to the user data of coupling, then proceed the processing of call flow; If when confirming to get access to the user data of coupling, execution in step A22 then;

A22, MSC send identity request to described user;

A23, get access to described user's IMSI according to the response message of user response.

Wherein, described steps A 3 specifically comprises:

A31, MSC search the user data of coupling according to described IMSI in VLR, if can get access to the user data of coupling, then proceed the processing of call flow; If when confirming to get access to the user data of coupling, execution in step A32 then;

This user's who comprises in A32, the initial direct-sending message according to user's transmission identify label TMSI obtains the NRI value that wherein comprises.

Wherein, described step B specifically comprises:

B1, described MSC judge that whether the described NRI value that gets access to can be complementary with the NRI value in the Qi Chi district, if do not match, then discharges this calling; If coupling, execution in step B2 then,

B2, this user is initiated Data Recovery Process, and after the Data Recovery Process success, carry out the processing of follow-up normal call flow process.

Wherein, described step B2 specifically comprises:

Described MSC initiates Data Recovery Process to this user, if the processing of subsequent voice calls flow process is then carried out in the Data Recovery Process success; If the Data Recovery Process failure is then deleted described user data of users, and is discharged this calling.

Wherein, also comprise among the described step B2:

For the user distributes new TMSI, and comprise the NRI value of this MSC therein.

Wherein said method also comprises:

When the user carries out business, the selection coding IDNNS of the Non-Access Stratum node that carries in the initial direct-sending message derives according to the newly assigned TMSI value of described user, carry out the Route Selection of core net when RNC receives initial direct-sending message according to described IDNNS, then described service request from user is sent to the core net of described selection.

As seen from the above technical solution provided by the invention, after MSC of the present invention receives service request from user, when confirming in VLR, to get access to this user's data according to user's identify label TMSI and IMSI, then obtain the NRI value that comprises among this user's the identify label TMSI; Search the NRI value of coupling in the district of pond within it according to the described NRI value of obtaining, and when confirming to find the NRI value that is complementary, then this user is initiated Data Recovery Process.Therefore by the present invention, can improve the user by Data Recovery Process and do caller or do call completing rate when called, make the characteristic that can share between the different CN nodes in the IU FLEX networking have an opportunity to be not fully exerted.

In addition, the TMSI of the present invention by redistributing in the subsequent voice calls handling process of carrying out after Data Recovery Process success improves the user and selects the success rate of core net, thereby it is bigger to make the user carry out professional possibility of success.

Description of drawings

Fig. 1 is the structural representation of IU FLEX networking in the background technology;

Fig. 2 does caller for user in the background technology, and dynamic subscriber's data of user flow chart when VLR not;

Fig. 3 is called for user in the background technology does, and dynamic subscriber's data of user flow chart when VLR not;

Fig. 4 does caller for user among the present invention, and dynamic subscriber's data of user flow chart when VLR not;

Fig. 5 is called for user among the present invention does, and dynamic subscriber's data of user flow chart when VLR not.

Embodiment

Because the user ID that the user carried when carrying out business is TMSI, the NRI value that includes the Chi Qu of MSC correspondence among this TMSI, illustrate that this user once registered merits and demerits at certain CN of this Chi Qu, therefore in the IU FLEX networking of sharing CN, the success rate that current CN initiates the user data recovery should propose the present invention in view of this consideration than higher.

In the present invention, if the user is the NRI that comprises among called or the TMSI that uses when doing caller in the district of MSC pond, and this user's data not among the corresponding VLR, then MSC initiates user data and recovers flow process, continues user-dependent calling service or called service then.And behind this access success, MSC initiates TMSI and redistributes flow process, and for this user distributes new TMSI, the user uses new TMSI to substitute old TMSI, has ensured that RNC can be distributed to correct core net when this user carried out related service later on.

First embodiment provided by the invention is the call handling process of user when doing caller, and it comprises the steps: as shown in Figure 4

Step 1, the user uses TMSI to make a call as user ID, and passes through initial direct-sending message, RNC as described in sending to as CM SERVICE REQUEST message.Described RNC sends to corresponding MSC with described initial direct-sending message.

Step 2, described MSC gets access to the user ID TMSI of described user's correspondence according to the described message that receives.

Get access to the user ID TMSI of user's correspondence as MSC after, execution in step 3, promptly in VLR, search the user data of coupling according to described TMSI, if in the time of can not getting access to the user data with this user's TMSI coupling, then initiate the identification flow process, and get access to described user's IMSI according to described identification flow process, in VLR, search the user data of coupling then according to described IMSI.Specific implementation process is as follows:

Step 3, MSC searches the user data of coupling according to described TMSI in VLR, if can get access to the user data of coupling, then execution in step 4, promptly proceed the processing of call flow, that is to say the processing (referring to 3GPP TS 24008) of carrying out follow-up flow process according to the 3GPP related protocol; If when confirming to get access to the user data of coupling, then execution in step 5.

Step 5, MSC initiates the identification flow process, and the IMSI of acquisition user correspondence, in VLR, search the user data of coupling then according to described IMSI, if can get access to the user data of coupling, then execution in step 6, promptly proceed the processing of call flow, that is to say the processing (referring to 3GPP TS 24008) of carrying out follow-up flow process according to the 3GPP related protocol; If when confirming to get access to the user data of coupling, then execution in step 7.

In step 5, MSC at first initiates identity request, and sends to described user by IDENTITY REQUEST message, requires its corresponding IMSI of reporting of user.After the user receives described request, give MSC by its corresponding IMSI of IDENTITY RESPONSE information reporting.When MSC gets access to the IMSI of user's correspondence, then in VLR, search and described IMSi corresponding user data according to described IMSI.

Step 7, this user's who comprises in the initial direct-sending message according to user's transmission identify label TMSI obtains the NRI value that wherein comprises, and judge whether the described NRI value that gets access to can be complementary with the NRI value in the Qi Chi district, if do not match, then execution in step 8, promptly proceed the processing of call flow, that is to say the processing (referring to 3GPP TS 24008) of carrying out follow-up flow process according to the 3GPP related protocol; If coupling, then execution in step 9.

Step 9 is initiated Data Recovery Process to this user, if the Data Recovery Process success, then execution in step 10, promptly carry out the processing of subsequent voice calls flow process, that is to say the processing (referring to 3GPP TS 24008) of carrying out follow-up flow process according to the 3GPP related protocol; If failure, then execution in step 11, send CM SERVICE REJECT message promptly for described user, and delete described user data of users, initiate the call release flow process.

In step 11, call out when discharging, MSC at first sends IURELEASE COMMAND message to the RNC at this user place, after described RNC receives described message, call release, and after release finishes, send IU RELEASE COMPLETE message to MSC, dispose procedure completes successfully.

Second embodiment provided by the invention is that the user does the call flows when called, its still as shown in Figure 5, its implementation process is as follows:

Step 1, the user uses TMSI to carry out page response as user ID, and passes through initial direct-sending message, RNC as described in sending to as PAGING RESPONSE message.Described RNC sends to corresponding MSC with described initial direct-sending message.

Following step 2 is identical to the process and the corresponding steps among first embodiment of step 6.Here be not described in detail.

Next execution in step 7, this user's who comprises in the initial direct-sending message according to user's transmission identify label TMSI obtains the NRI value that wherein comprises, and judge whether the described NRI value that gets access to can be complementary with the NRI value in the Qi Chi district, if do not match, then execution in step 8, promptly carry out the processing (referring to 3GPP TS 24008) of follow-up flow process according to the 3GPP related protocol; If coupling, then execution in step 9.

Step 9 is initiated Data Recovery Process to this user.If data are recovered successfully, then execution in step 10, promptly carry out the processing of subsequent voice calls flow process, that is to say the processing (referring to 3GPP TS 24008) of carrying out follow-up flow process according to the 3GPP related protocol; If data are recovered failure, then execution in step 11, promptly delete described user data of users, initiate the call release flow process.

In the call release flow process of step 11, MSC at first sends IURELEASE COMMAND message to the RNC at this user place, after described RNC receives described message, call release, and after release finishes, sending IU RELEASE COMPLETE message to MSC, dispose procedure completes successfully.

The 3rd embodiment provided by the invention, it has increased following content on the basis of first embodiment and second embodiment:

After confirming that the NRI value that gets access to can be complementary with any NRI value in the district of MSC pond, when carrying out follow-up call flow processing, in user's call flow,, wherein comprise the NRI value of this MSC for the user distributes new TMSI.

After handling like this, owing to comprise the NRI value of this MSC in the newly assigned TMSI value of user, so can correctly select core net when the user carries out business, it is bigger to make the user carry out professional possibility of success.The concrete process of core net of selecting is as follows:

When the user carries out business, the IDNNS that carries in the initial direct-sending message derives according to the newly assigned TMSI value of described user, carry out the Route Selection of core net when RNC receives initial direct-sending message according to described IDNNS, then described service request from user is sent to the core net of described selection.

Above-mentioned specific embodiments only needs in MSC original flow process to be done above-mentioned modification, does not influence interface protocol, do not influence other network element, so feasibility is more intense.In addition, this method also is applicable to the networking situation of MOCN+IU FLEX simultaneously.

By above-mentioned specific embodiments as can be seen, in service request from user, that carry is the TMSI (can judge by NRI) that MSC distributes, if and do not have corresponding user data among the VLR of MSC, then MSC initiates VLR user data recovery flow process, thereby can improve user's call completing rate, and then make the effect of sharing CN in the IU FLEX networking have an opportunity to be not fully exerted.

In addition, the present invention distributes new TMSI for this user in follow-up call flow after user data recovers the flow process success, when making this user carry out business later on, use this effective TMSI to derive IDNNS, when RNC carries out the Route Selection of core net, can correctly select core net.Thereby make professional possibility of success bigger.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1. the method based on IU FLEX technology realization user call proceeding is characterized in that, comprising:

2. method according to claim 1 is characterized in that, described steps A specifically comprises:

3. method according to claim 2 is characterized in that, described steps A 1 specifically comprises:

A12, described RNC send to corresponding MSC with described message;

4. method according to claim 2 is characterized in that, described steps A 2 specifically comprises:

A22, MSC send identity request to described user;

5. method according to claim 2 is characterized in that, described steps A 3 specifically comprises:

6. according to any described method of claim 1 to 5, it is characterized in that described step B specifically comprises:

B1, described MSC judge that whether the described NRI value that gets access to can be complementary with the NRI value in the Qi Chi district, if do not match, then discharges this calling; If coupling, then execution in step B2;

7. method according to claim 6 is characterized in that, described step B2 specifically comprises:

8. method according to claim 6 is characterized in that, described step B2 also comprises:

9. method according to claim 8 is characterized in that, also comprises: