CN110351800A

CN110351800A - A kind of method and system of redundancy joint attachment

Info

Publication number: CN110351800A
Application number: CN201910656116.3A
Authority: CN
Inventors: 张余
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2019-10-18
Anticipated expiration: 2039-07-19
Also published as: CN110351800B

Abstract

The present invention provides a kind of method of redundancy joint attachment, comprising: MME sends messages to 3G and nets corresponding VLR, and VLR stores MME information, and creates 3G net MSC and be associated with the SGs of MME；And make the MSC location information of HLR storage 3G net；Then the MSC that MME is netted to 2G issues position updating request, and the VLR of 2G net stores MME information, and creates relevant SGs association；And make the location information of HLR storage 2G net MSC；When there is incoming call, if the MSC of 3G net breaks down, the MSC that HLR is netted to 2G obtains roaming number, and to obtain mobile terminal homing position information, mobile terminal falls back to the network cell 2G, establishes call.The invention also includes corresponding systems.The method and system of redundancy joint attachment of the present invention; when 4G multimode card has voice service to need to fall after rise; and the MSC of 3G network is when abnormal or corresponding SGs interface occur and breaking down, call request is completed by the attachment MSC of 2G network, improves call completion ability and success rate.

Description

A kind of method and system of redundancy joint attachment

Technical field

The present invention relates to fields of communication technology, and in particular to a kind of method and a kind of redundancy connection of the attachment of redundancy joint The system for closing attachment.

Background technique

CSFB (Circuit Switched Fallback, circuit domain dropping) is a kind of based on circuit-domain network offer language The communication technology of sound business.At the deployment initial stage of LTE (Long Term Evolution, long term evolution) network, CSFB conduct Technology is realized in the voice service at deployment of LTE network initial stage, and when terminal carries out voice service, controlling terminal falls back to 3G (3rd- Generation, 3rd generation mobile communication technology) or 2G (Second Generation, Generation Mobile Telecommunication System technology) network, Good user experience is provided using the high coverage rate and mature technology of 3G/2G network for user.

Typical CSFB operation flow mainly includes joint attachment, location updating, caller (MO) CSFB process, called (MT) CSFB process and attachment removal etc.；The attachment flow for enabling the user of CSFB function is based on joint GPRS (General Packet Radio Service, General Packet Radio Service)/IMSI (International Mobile Subscriber Identity, international mobile subscriber identity) attachment flow realizes.After joint is adhered to successfully, CSFB ability is enabled User in the lte networks can processing circuit domain service；But as MSC (the Mobile Switching of joint attachment Center, mobile switching centre) when breaking down or MSC and MME (Mobility Management Entity, mobility Management entity) SGs (Serving General Packet Radio Service, service universal packet wireless business business) interface When failure, if there is incoming call mobile terminal, calling can not be established, and influence user experience.

Summary of the invention

It breaks down or MSC and MME at least partly solve the MSC of joint attachment existing in the prior art The technical issues of can not establishing is called when SGs interface breaks down and completes the present invention.

Solving technical solution used by present invention problem is: the present invention provides a kind of side of redundancy joint attachment Method, comprising:

MME sends messages to the first MSC of 3G network, and the first MSC receives the MME stored in the message after the message and identifies Information, and create the first MSC under 4G multimode card and be associated with the SGs of MME；Subsequent first MSC issues location updating to HLR and asks It asks, HLR agrees to that the location information of the first MSC of storage after the position updating request, the first MSC issue location updating to MME and complete Information；

MME issues position updating request to the 2nd MSC of 2G network, and the 2nd MSC stores the MME in the position updating request Identification information, and create the 2nd MSC under 4G multimode card and be associated with the SGs of MME；Then believed according to user information and position area Breath, the 2nd MSC issue position updating request to HLR, and HLR agrees to the location information of the 2nd MSC of storage after the position updating request, 2nd MSC issues location updating to MME and completes information；

MME sends attachment and completes message to mobile terminal, completes joint attachment；

When there is incoming call 4G multimode card, caller issues the request for obtaining mobile terminal homing position information to HLR, if First MSC breaks down, and HLR has not been obtained from the first MSC to roaming number, then roaming number is obtained to the 2nd MSC, to be moved Dynamic terminal attaching location information, the 2nd MSC issue paging request to mobile terminal by MME, and mobile terminal responds the paging and asks After asking, the network cell 2G is fallen back to, establishes call.

Further, the HLR has not been obtained from the first MSC to roaming number, then it is specific to obtain roaming number to the 2nd MSC Are as follows:

HLR issues the request for obtaining roaming number to the first MSC, and timer is arranged, after expiration of the timer if the One MSC does not feed back roaming number, then HLR issues the request for obtaining roaming number to the 2nd MSC, and the 2nd MSC is fed back to HLR to be roamed Number, while paging request is issued to MME.

Further, before MME sends messages to the first MSC of 3G network further include:

4G multimode card sends Attach Request message to MME, and wherein type of message indicates that this is one united EPS/IMSI attachment flow, and message instruction mobile terminal has CS Fallback ability.

Further, when MME sends messages to a MSC of 3G network, the message includes:

The IMSI of new LAI (Location Area Identify, Location Area Identification), 4G multimode card (International Mobile Subscriber Identity, international mobile subscriber identity), MME name (MME mark Know) and Location Update Type (location updating type) parameter.

According to another aspect of the present invention, the present invention also provides a kind of systems of redundancy joint attachment, comprising: MME, HLR, First MSC, the 2nd MSC and mobile terminal；First MSC corresponds to 3G network, and the 2nd MSC corresponds to 2G network；The shifting Dynamic terminal includes 4G multimode card；

The MME should for storage after receiving the message for sending messages to the first MSC of 3G network, the first MSC MME identification information in message, and create the first MSC under 4G multimode card and be associated with the SGs of MME；And position is issued to HLR Request is updated, the HLR is used to agree to the location information of the first MSC of storage after position updating request；First MSC is also used to Location updating, which is issued, to MME completes information；

The MME is also used to issue position updating request to the 2nd MSC of 2G network, and the 2nd MSC is used for the position The MME identification information in request is updated, and creates the 2nd MSC under 4G multimode card and is associated with the SGs of MME；Then according to user Information and location area information issue position updating request to HLR, and the HLR is stored after being also used to agree to the position updating request The location information of 2nd MSC, the 2nd MSC, which is also used to issue location updating to MME, completes information；

The MME is also used to send attachment and completes message to mobile terminal, completes joint attachment；

When there is incoming call 4G multimode card, caller issues the request for obtaining mobile terminal homing position information to HLR, if First MSC breaks down, and when HLR has not been obtained from the first MSC to roaming number, the HLR is also used to obtain to the 2nd MSC and roam Number, to obtain mobile terminal homing position information, the 2nd MSC is used to issue paging request to mobile terminal by MME, The mobile terminal establishes call for falling back to the network cell 2G after responding the paging request.

Further, the HLR further includes timer；When HLR has not been obtained from the first MSC to roaming number, the HLR For obtaining roaming number to the 2nd MSC, specifically:

The HLR issues the request for obtaining roaming number to the first MSC, and starts timer, after expiration of the timer such as The first MSC of fruit does not feed back roaming number, then HLR issues the request for obtaining roaming number to the 2nd MSC, and the 2nd MSC is fed back to HLR Roaming number, while paging request is issued to MME.

Further, the 4G multimode card of the mobile terminal is used to send Attach Request message to MME, wherein disappearing Breath type indicates that this is a united EPS/IMSI attachment flow, and message instruction mobile terminal has CS Fallback Ability.

Further, for sending messages to the first MSC, the message includes: MME

New LAI, IMSI, MME name of 4G multimode card and Location Update Type parameter.

The utility model has the advantages that

The method and system of redundancy joint attachment of the present invention are combined by the 4G multimode card in mobile terminal When attachment, the 2nd MSC of MME and the first MSC and 2G network of 3G network are attached, store the first MSC simultaneously in HLR With the location information of the 2nd MSC, when mobile terminal 4G multimode card has voice service to need to fall back to circuit domain processing business, and 3G The MSC of network occur the MSC and MME of exception or 3G network SGs interface break down when, call request by 2G network attachment MSC is completed, and improves call completion ability and success rate.

Detailed description of the invention

Fig. 1 is a kind of flow chart of the method for redundancy joint attachment that the embodiment of the present invention one provides；

Fig. 2 is a kind of architecture diagram of the system of redundancy joint attachment provided by Embodiment 2 of the present invention.

Specific embodiment

Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawings and examples to this Invention is described in further detail.

Embodiment one

As shown in Figure 1, the present invention provides a kind of method of redundancy joint attachment, comprising:

Step S1:MME sends messages to the first MSC of 3G network, and the first MSC is stored in the message after receiving the message MME identification information, and create the first MSC under 4G multimode card and be associated with the SGs of MME；Subsequent first MSC issues position to HLR Request is updated, HLR agrees to that the location information of the first MSC of storage after the position updating request, the first MSC issue position more to MME It is new to complete information；

Step S2:MME issues position updating request to the 2nd MSC of 2G network, and the 2nd MSC stores the position updating request In MME identification information, and create under 4G multimode card the 2nd MSC be associated with the SGs of MME；Then according to user information and position Area's information is set, the 2nd MSC issues position updating request to HLR, and HLR agrees to the position of the 2nd MSC of storage after the position updating request Confidence breath, the 2nd MSC issue location updating to MME and complete information；

Step S3:MME sends attachment and completes message to mobile terminal, completes joint attachment；

Step S4: when there is incoming call 4G multimode card, caller issues to HLR and obtains asking for mobile terminal homing position information It asks, if the first MSC breaks down, HLR is had not been obtained from the first MSC to roaming number, then roaming number is obtained to the 2nd MSC, To obtain mobile terminal homing position information, the 2nd MSC issues paging request, mobile terminal response to mobile terminal by MME After the paging request, the network cell 2G is fallen back to, establishes call.

The mobile terminal uses 4G multimode card, and CSFB technology is selected to realize voice communication, in joint attaching process In, MME is carrying out EPS (Evolved Packet System, the grouping system of evolution after receiving the joint attach request of user System) attachment while, can derive the VLR information in its correlation CS (Circuit Switched, circuit switching) domain, and to this VLR launch position updates request, after VLR receives position updating request, can mark the user as having carried out EPS attachment , and the IP address of the MME of user is saved, in this way, being created that the MSC/VLR of user is associated with the SGs between MME in VLR；With Afterwards, MSC Server/VLR will do it the domain CS location updating and the TMSI of user (Temporary Mobile Subscriber Identify, temporarily moved subscriber identification number) and LAI (Location Area Identify, Location Area Identification) be transmitted to MME, to establish SGs association in MME；Finally, the information such as TMSI and LAI that MME distributes VLR to user be included in it is attached Be sent to UE (User Equipment, user equipment) in request received message, indicated that the joint attachment of user at this time Through successful, be generally attached on 3G network in attaching process, but when the MSC of joint attachment breaks down or MSC with The SGs interface of MME breaks down, and when having incoming call mobile terminal, will lead to calling can not be established, by by MME and 3G net 2nd MSC of the first MSC and 2G network of network is attached, and stores the position of the first MSC and the 2nd MSC simultaneously in hlr Information breaks down when one of, then issues paging request by another MSC, fall back to corresponding 3G network or 2G net The cell of network establishes call, and call completion ability and success rate can be improved, and promotes user experience.

When there is incoming call mobile terminal, the Call-Establish-Success rate equipment of caller is issued to HLR obtains mobile terminal ownership The request of location information show that the ownership MSC, HLR of mobile terminal are issued to the first MSC from HLR with this and obtains roaming number Request, and timer is set in HLR, and the first MSC does not feed back roaming number information after timing, surface at this time first MSC breaks down or the SGs interface of the first MSC and MME breaks down, and subsequent HLR is issued to the 2nd MSC and obtained roaming number Request, if the 2nd MSC feed back roaming number, can determine mobile terminal homing position information be the 2nd MSC, second MSC issues paging request to MME simultaneously, and MME issues paging request to mobile terminal, after mobile terminal responds paging request, returns The network cell 2G is fallen on, call is established.

After mobile terminal-opening, the joint attachment flow of 4G multimode card will start；Mobile terminal 4G multimode card is sent out to MME Send Attach Request message, the Attach in the Attach Request message and existing network registration process Request message is consistent, and for starting attachment flow, wherein parameter Attach Type indicates that this is a united EPS/ IMSI attachment flow, and parameter instruction mobile terminal has CS Fallback ability.

Further, when MME sends messages to the first MSC of a 3G network corresponding VLR, the message includes:

The message that MME is sent to the first VLR is that SGsAP-LOCATION-UPDATE-REQUEST (want by SGsAP location updating Ask) message includes the ginsengs such as new LAI, IMSI, MME name of 4G multimode card and Location Update Type in message Number makes required information to provide joint attachment.

Embodiment two

According to another aspect of the present invention, as shown in Fig. 2, the present invention also provides a kind of system of redundancy joint attachment, packet It includes: mobile terminal 1, MME2, the first MSC3, HLR4 and the 2nd MSC5；First MSC corresponds to 3G network, the 2nd MSC Corresponding 2G network；The mobile terminal 1 includes 4G multimode card 11；

The MME2 is for sending messages to the first MSC3 of 3G network, and the first MSC3 after receiving the message for storing MME2 identification information in the message, and create the first MSC3 under 4G multimode card 11 and be associated with the SGs of MME2；And to HLR4 Position updating request is issued, the HLR4 is used to agree to the location information of the first MSC3 of storage after position updating request；Described One MSC3, which is also used to issue location updating to MME2, completes information；

The MME2 is also used to issue position updating request to the 2nd MSC5 of 2G network, and the 2nd MSC5 is used for the position The MME2 identification information updated in request is set, and creates the 2nd MSC5 under 4G multimode card 11 and is associated with the SGs of MME2；Then root According to user information and location area information, position updating request is issued to HLR4, the HLR4 is also used to agree to that the location updating is asked The location information of the 2nd MSC5 is stored after asking, the 2nd MSC5, which is also used to issue location updating to MME2, completes information；

The MME2 is also used to send attachment and completes message to mobile terminal 1, completes joint attachment；

When there is incoming call 4G multimode card 11, caller issues the request for obtaining 1 homing position information of mobile terminal to HLR4, If the first MSC3 breaks down, when HLR4 has not been obtained from the first MSC3 to roaming number, the HLR4 is also used to second MSC5 obtains roaming number, and to obtain 1 homing position information of mobile terminal, the 2nd MSC5 is used for whole to movement by MME2 End 1 issues paging request, and the mobile terminal 1 establishes call for falling back to the network cell 2G after responding the paging request.

Further, the HLR4 further includes timer；It is described when HLR4 has not been obtained from the first MSC3 to roaming number HLR4 is used to obtain roaming number to the 2nd MSC5, specifically:

The HLR4 issues the request for obtaining roaming number to the first MSC3, and starts timer, after expiration of the timer If the first MSC3 does not feed back roaming number, HLR4 issues the request for obtaining roaming number to the 2nd MSC5, the 2nd MSC5 to HLR4 feeds back roaming number, while issuing paging request to MME2.

Further, the 4G multimode card 11 of the mobile terminal 1 is used to send Attach Request message to MME2, Middle type of message indicates that this is a united EPS/IMSI attachment flow, and message instruction mobile terminal 1 has CS Fallback ability.

Further, for sending messages to the first MSC3, the message includes: MME2

For this system embodiment, since it is substantially corresponding with embodiment of the method, so being described relatively simple, phase Place is closed referring to the corresponding process in preceding method embodiment one, details are not described herein.

It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.

Claims

1. a kind of method of redundancy joint attachment characterized by comprising

MME sends messages to the first MSC of 3G network, and the first MSC, which receives the MME mark stored in the message after the message, to be believed Breath, and create the first MSC under 4G multimode card and be associated with the SGs of MME；Subsequent first MSC issues position updating request to HLR, HLR agrees to that the location information of the first MSC of storage after the position updating request, the first MSC issue location updating to MME and complete letter Breath；

MME issues position updating request to the 2nd MSC of 2G network, and the 2nd MSC stores the mark of the MME in the position updating request Information, and create the 2nd MSC under 4G multimode card and be associated with the SGs of MME；Then according to user information and location area information, Two MSC issue position updating request to HLR, and HLR agrees to the location information that the 2nd MSC is stored after the position updating request, and second MSC issues location updating to MME and completes information；

When there is incoming call 4G multimode card, caller issues the request for obtaining mobile terminal homing position information to HLR, if the One MSC breaks down, and HLR has not been obtained from the first MSC to roaming number, then roaming number is obtained to the 2nd MSC, to be moved Terminal attaching location information, the 2nd MSC issue paging request to mobile terminal by MME, and mobile terminal responds the paging request Afterwards, the network cell 2G is fallen back to, call is established.

2. the method for redundancy joint attachment according to claim 1, which is characterized in that the HLR has not been obtained from the first MSC To roaming number, then roaming number is obtained to the 2nd MSC specifically:

HLR issues the request for obtaining roaming number to the first MSC, and timer is arranged, after expiration of the timer if the first MSC Not feeding back roaming number, then HLR issues the request for obtaining roaming number to the 2nd MSC, and the 2nd MSC feeds back roaming number to HLR, Paging request is issued to MME simultaneously.

3. the method for redundancy joint attachment according to claim 1, which is characterized in that MME sends messages to 3G network Before first MSC further include:

4G multimode card sends Attach Request message to MME, and wherein type of message indicates that this is a united EPS/ IMSI attachment flow, and message instruction mobile terminal has CS Fallback ability.

4. the method for redundancy joint attachment according to claim 1, which is characterized in that MME sends messages to 3G network When one MSC, the message includes:

5. a kind of system of redundancy joint attachment characterized by comprising MME, HLR, the first MSC, the 2nd MSC and movement are eventually End；First MSC corresponds to 3G network, and the 2nd MSC corresponds to 2G network；The mobile terminal includes 4G multimode card；

The MME is for sending messages to the first MSC of 3G network, and the first MSC is for storing the message after receiving the message In MME identification information, and create under 4G multimode card the first MSC be associated with the SGs of MME；And location updating is issued to HLR Request, the HLR are used to agree to the location information of the first MSC of storage after position updating request；First MSC be also used to MME issues location updating and completes information；

The MME is also used to issue position updating request to the 2nd MSC of 2G network, and the 2nd MSC is used for the location updating MME identification information in request, and create the 2nd MSC under 4G multimode card and be associated with the SGs of MME；Then according to user information And location area information, position updating request is issued to HLR, the HLR stores second after being also used to agree to the position updating request The location information of MSC, the 2nd MSC, which is also used to issue location updating to MME, completes information；

When there is incoming call 4G multimode card, caller issues the request for obtaining mobile terminal homing position information to HLR, if first MSC breaks down, and when HLR has not been obtained from the first MSC to roaming number, the HLR is also used to obtain roaming number to the 2nd MSC Code, to obtain mobile terminal homing position information, the 2nd MSC is used to issue paging request, institute to mobile terminal by MME Mobile terminal is stated for falling back to the network cell 2G after responding the paging request, establishes call.

6. the system of redundancy joint attachment according to claim 5, which is characterized in that the HLR further includes timer；? When HLR has not been obtained from the first MSC to roaming number, the HLR is used to obtain roaming number to the 2nd MSC, specifically:

The HLR issues the request for obtaining roaming number to the first MSC, and starts timer, after expiration of the timer if the One MSC does not feed back roaming number, then HLR issues the request for obtaining roaming number to the 2nd MSC, and the 2nd MSC is fed back to HLR to be roamed Number, while paging request is issued to MME.

7. the system of redundancy joint attachment according to claim 5, which is characterized in that

The 4G multimode card of the mobile terminal is used to send Attach Request message to MME, and wherein type of message indicates this It is a united EPS/IMSI attachment flow, and message instruction mobile terminal has CS Fallback ability.

8. the system of redundancy joint attachment according to claim 5, which is characterized in that MME is for sending messages to first MSC, the message include: