CN105637954A - Paging processing method and device for downlink circuit switched fallback (csfb) - Google Patents

Abstract

Disclosed are a paging processing method and device for a downlink circuit switched fallback (CSFB), so as to solve the problem in the prior art that when an MME pages a UE by using an S-TMSI, the UE cannot respond to S-TMSI paging initiated by the MME because a TMSI is not stored in the UE. The method comprises: a UE receives a request message sent by an MME, the request message being used for requesting the UE to initiate a CSFB process and make a response by using a TMSI when the UE falls back to a CS domain network; if the UE does not store the TMSI, the UE sends, to the MME, indication information used for indicating that the TMSI is not stored in the UE, so that the MME returns an IMSI instruction used for instructing the UE to make a response by using an IMSI; and the UE sends, to a target 2G/3G base station, a paging response comprising an IMSI of the UE in a CSFB process according to the IMSI instruction returned by the MME.

Description

Paging processing method and device for downlink circuit switched fallback (csfb)

A kind of downstream circuitry exchanges the paging processing method and equipment technical field for falling CSFB after rise

The present invention relates to wireless communication technology field, more particularly to a kind of downstream circuitry, which is exchanged, to be fallen after rise（Circuit Switched Fallback, CSFB) paging processing method and equipment.Background technology

Evolved packet system（Evolved Packet System, abbreviation EPS) it is third generation cooperative partner program (3rd Generation Partnership Project, referred to as 3 GPP) in the second generation (The Second Generation, abbreviation 2G) mobile communications network（That is GSM/EDGE:Global System of Mobile Communication/Enhanced Data Rate for GSM Evolution, global system for mobile communications/enhanced data rates for gsm evolution technology； GSM:Global System for Mobile, global mobile communication) and the third generation（The Third Generation, abbreviation 3G) mobile communications network（That is UMTS:Universal Mobile Telecommunications System, UMTS) on the basis of release.EPS networks include evolved universal GSM land radio access web（Evolved Universal Mobile Telecommunication System Territorial Radio Access Network, abbreviation E-UTRAN) and evolution block core net（Evolved Packet Core Network, abbreviation EPC), EPS networks can only provide packet switch（Packet Switched, abbreviation PS) business.

Based on mobile switching center/visitor location register in existing 2G/3G networks (Mobile Switching Center/Visitors Location Register, abbreviation MSC/VLR) and mobile management entity（Mobility Management Entity, abbreviation MME) between SGs interface functions, 3GPP proposes " circuit switching fall-back,（Abbreviation CSFB) technology and SGs short message transmissions（Short Message Service over SGs, abbreviation SMS over SGs) technology.CSFB technologies make the user equipment (User Equipment, abbreviation UE) under E-UTRAN coverings need process circuit to exchange（Circuit Switched, abbreviation CS) speech business when, 2G/3G network C S domains are fallen back to by E-UTRAN, handled with finishing service.SMS over SGs technologies allow the UE resided under E-UTRAN to reuse existing CS domains to realize CS short messages Transmission.

In above-mentioned CSFB and SMS over SGs mechanism, reside in E-UTRAN and support CSFB and/or SMS over SGs UE to need to initiate combined registering flow, registered while realization to EPC network PS fields is with 2G/3G network C S domains.After successfully combined registering is realized, the CSFB business of up-downgoing and the short message service of up-downgoing could be initiated normally.

Deploying MSC resource pools（MSC Pool) scene under, for Idle state UE descending CS business, when UE resides in 2G/3G networks, be UE service MSC/VLR use UE IMSI International Mobile Subscriber Identity（International Mobile Subscriber Identity, abbreviation IMSI) initiate paging can be normally carried out.But when UE resides in E-UTRAN, problem occurs using the UE IMSI pagings initiated for the MSC/VLR that UE is serviced, because after UE falls back to 2G/3G network C S domains, the UE received the page responses sent can not be sent to the MSC/VLR that this paging is initiated in MSC Pool by 2G/3G base stations, so as to cause descending CS service fails.In order to solve the problem, prior art have modified the paging policy on MME, i.e. no matter MSC/VLR carries out paging on SGs interfaces using IMSI or TMSI, MME is unified under any scene uses S-TMSI pagings UE, so that UE carries out page response after 2G/3G CS domains are fallen back to using TMSI.But, under non-MSC Pool scene, it is very normal not distribute TMSI, if MME is unified to use S-TMSI pagings UE, then according to current UE response policy, if without TMSI is preserved in UE, the UE does not respond to the S-TMSI pagings of MME initiations, also results in the called failures of CS.The content of the invention

The paging processing method and equipment for falling CSFB after rise are exchanged the embodiments of the invention provide a kind of downstream circuitry, for solve in the prior art MME use S-TMSI paging UE when, due to do not have in UE preserve TMSI and cause UE be not responding to MME initiation S-TMSI pagings the problem of.

In a first aspect, a kind of downstream circuitry exchanges the paging processing method for falling CSFB after rise, this method includes：User equipment (UE) receives the request message that mobile management entity MME is sent, and the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to； If the UE does not preserve TMSI, the UE sends the configured information for indicating not preserve TMSI in the UE to the MME, so that the MME is returned for indicating that the UE is indicated using the IMSI International Mobile Subscriber Identity IMSI IMSI responded；

The IMSI that the UE is returned according to the MME indicates that being sent in the CSFB flows to the target second generation/third generation 2G/3G base stations includes the page response of the IMSI.

With reference in a first aspect, in the first possible implementation, the request message is：Beep-page message or CS service announcements message.

With reference to the first possible implementation of first aspect, in second of possible implementation, the beep-page message includes the S-TMSI of the UE;Or, the CS service announcements message includes paging mark cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

With reference to second of possible implementation of the first possible implementation or first aspect of first aspect, in the third possible implementation, if the request message is the CS service announcements message and the UE is in Idle state, methods described also includes：

The UE is received after packet switched ps domain beep-page messages of the MME using UE S-TMSI transmissions, enters connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

With reference to second of possible implementation of the first possible implementation or first aspect of first aspect, first aspect, in the 4th kind of possible implementation, the UE sends the configured information for indicating not preserve TMSI in the UE to the MME, including：

The UE is sent to the MME and activated business request message, and the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, the configured information is CSFB responses.

Second of possible implementation, the third possible implementation of first aspect, the 5th kind of possible implementation of the 4th kind of possible implementation or first aspect of first aspect of the first possible implementation, first aspect with reference to first aspect, first aspect, in the 6th kind of possible implementation, if the request message also includes mobile services switching centre/visiting location register MSC/VLR Global core network identifier CN ID, the MSC/VLR be located at MSC resource pools in, this method also includes：

The UE sends the IMSI and the global CN ID of the UE in the CSFB flows to the target 2G/3G base stations, so that the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

A kind of second aspect, downstream circuitry exchanges the paging processing method for falling CSFB after rise, and this method includes：Mobile management entity MME sends request message to user equipment (UE), and the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

The MME is indicated in being used for of receiving that the UE sends after not preserving TMSI configured information in the UE, is sent to the UE for indicating the IMSI instructions that the UE is responded using IMSI International Mobile Subscriber Identity IMSI.

With reference to second aspect, in the first possible implementation, the request message is：Beep-page message or CS service announcements message.

With reference to the first possible implementation of second aspect, in second of possible implementation, the beep-page message also includes the S-TMSI of the UE;Or, the CS service announcements message also includes paging and identifies cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

With reference to second of possible implementation of the first possible implementation or second aspect of second aspect, in the third possible implementation, if the request message is the CS service announcements message and the UE is in Idle state, methods described also includes：

The MME sends packet switched ps domain beep-page message using the S-TMSI of the UE to the UE, so that the UE enters connected state, wherein, the core net CN domains in the ps domain beep-page message are PS.

The third possible implementation of the second possible implementation or second aspect of the first possible implementation, second aspect with reference to second aspect, second aspect, in the 4th kind of possible implementation, what the MME received that the UE sends is used to indicate not preserve TMSI in the UE Configured information, including：

The MME receives the configured information carried in the request message of activating business that the UE is sent, the request message of activating business for indicating not preserve TMSI in the UE.

With reference to the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation, the configured information is CSFB responses.

Second of possible implementation, the third possible implementation of second aspect, the 5th kind of possible implementation of the 4th kind of possible implementation or second aspect of second aspect of the first possible implementation, second aspect with reference to second aspect, second aspect, in the 6th kind of possible implementation, this method also includes：

The MME passes through the UE or evolved node B eNodeB, the global core network identifier CN ID of the IMSI and mobile services switching centre/visiting location register MSC/VLR are sent to the target second generation/third generation 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

With reference to the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation, the MME sends the IMSI and global CN ID by the eNodeB to the target 2G/3G base stations, including：

Notification message including the IMSI and the global CN ID is sent to the eNodeB by the MME, so that the IMSI and the global CN ID are sent to the target 2G/3G base stations by the eNodeB, wherein, the notification message is：Beep-page message or descending transmission message.

A kind of third aspect, user equipment (UE), UE includes：

First module, request message for receiving mobile management entity MME transmission, the request message is used to ask the UE belonging to the first module to initiate circuit switching fall-back CSFB flows and responded after circuit-switched CS domain network is fallen back to using Temporary Mobile Subscriber Identity TMSI；

Second unit, if the UE does not preserve TMSI, the configured information for indicating not preserve TMSI in the UE is sent to the MME, so that the MME is returned for indicating that the UE is indicated using the IMSI International Mobile Subscriber Identity IMSI IMSI responded；

Third unit, the IMSI for being returned according to the MME is indicated, in the CSFB flows Being sent to the target second generation/third generation 2G/3G base stations includes the page response of the IMSI.With reference to the third aspect, in the first possible implementation, the request message is：Beep-page message or CS service announcements message.

With reference to the first possible implementation of the third aspect, in second of possible implementation, the beep-page message includes the S-TMSI of the UE;Or, the CS service announcements message includes paging mark cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

With reference to second of possible implementation of the first possible implementation or the third aspect of the third aspect, in the third possible implementation, if the request message is the CS service announcements message and the UE is in Idle state, the first module is additionally operable to：

After the packet switched ps domain beep-page message that the MME is sent using UE S-TMSI is received, the UE is set to enter connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

The third possible implementation of the second possible implementation or the third aspect of the first possible implementation, the third aspect with reference to the third aspect, the third aspect, in the 4th kind of possible implementation, the second unit specifically for：

Send and activate business request message to the MME, the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

With reference to the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation, the configured information is CSFB responses.

Second of possible implementation, the third possible implementation of the third aspect, the 5th kind of possible implementation of the 4th kind of possible implementation or the third aspect of the third aspect of the first possible implementation, the third aspect with reference to the third aspect, the third aspect, in the 6th kind of possible implementation, if the request message also includes mobile services switching centre/visiting location register MSC/VLR global core network identifier CN ID, the MSC/VLR is located in MSC resource pools, and the third unit is additionally operable to：

In the CSFB flows IMSI of the UE is sent to the target 2G/3G base stations and described Global CN ID, so that the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

A kind of fourth aspect, user equipment (UE), UE includes：

Transceiver, request message for receiving mobile management entity MME transmission, the request message is used to ask the UE belonging to the transceiver to initiate circuit switching fall-back CSFB flows and responded after circuit-switched CS domain network is fallen back to using Temporary Mobile Subscriber Identity TMSI；If the UE does not preserve TMSI, the configured information for indicating not preserve TMSI in the UE is sent to the MME, so that the MME is returned for indicating that the UE is indicated using the IMSI International Mobile Subscriber Identity IMSI IMSI responded；

Processor, the IMSI for being returned according to the MME is indicated, in the CSFB flows, and transceiver is sent to the target second generation/third generation 2G/3G base stations includes the page response of the IMSI.

With reference to fourth aspect, in the first possible implementation, the request message is：Beep-page message or CS service announcements message.

With reference to the first possible implementation of fourth aspect, in second of possible implementation, the beep-page message includes the S-TMSI of the UE;Or, the CS service announcements message includes paging mark cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

With reference to second of possible implementation of the first possible implementation or fourth aspect of fourth aspect, in the third possible implementation, if the request message is the CS service announcements message and the UE is in Idle state, transceiver is additionally operable to：

After the packet switched ps domain beep-page message that the MME is sent using UE S-TMSI is received, the UE is set to enter connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

The third possible implementation of the second possible implementation or fourth aspect of the first possible implementation, fourth aspect with reference to fourth aspect, fourth aspect, in the 4th kind of possible implementation, transceiver specifically for：

Sending to carry in request message of activating business, the request message of activating business to the MME is used for Indicate not preserve TMSI configured information in the UE.

With reference to the 4th kind of possible implementation of fourth aspect, in the 5th kind of possible implementation, the configured information is CSFB responses.

Second of possible implementation, the third possible implementation of fourth aspect, the 5th kind of possible implementation of the 4th kind of possible implementation or fourth aspect of fourth aspect of the first possible implementation, fourth aspect with reference to fourth aspect, fourth aspect, in the 6th kind of possible implementation, if the request message also includes mobile services switching centre/visiting location register MSC/VLR global core network identifier CN ID, the MSC/VLR is located in MSC resource pools, and transceiver is additionally operable to：

The IMSI and the global CN ID of the UE is sent to the target 2G/3G base stations in the CSFB flows, so that the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

A kind of 5th aspect, mobile management entity MME, MME includes：

First module, for sending request message to user equipment (UE), the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

Second module, for being indicated in being used for of receiving that the UE sends after not preserving TMSI configured information in the UE, sends for indicating the IMSI instructions that the UE is responded using IMSI International Mobile Subscriber Identity IMSI to the UE.

With reference to the 5th aspect, in the first possible implementation, the request message is：Beep-page message or CS service announcements message.

With reference to the first possible implementation of the 5th aspect, in second of possible implementation, the beep-page message also includes the S-TMSI of the UE;Or, the CS service announcements message also includes paging and identifies cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

With reference to the first possible implementation or second of possible implementation of the 5th aspect of the 5th aspect, in the third possible implementation, disappear if the request message is the CS service announcements Cease and the UE is in Idle state, first module is additionally operable to：

Packet switched ps domain beep-page message is sent to the UE using the S-TMSI of the UE, so that the UE enters connected state, wherein, the core net CN domains in the ps domain beep-page message are PS.

With reference to the third possible implementation of the 5th aspect, the first possible implementation of the 5th aspect, second of possible implementation of the 5th aspect or the 5th aspect, in the 4th kind of possible implementation, what second module received that the UE sends is used to indicate not preserving TMSI configured information in the UE, including：

Receive the configured information carried in the request message of activating business that the UE is sent, the request message of activating business for indicating not preserve TMSI in the UE.

With reference to the 4th kind of possible implementation of the 5th aspect, in the 5th kind of possible implementation, the configured information is CSFB responses.

With reference to the 5th kind of possible implementation of the 5th aspect, the first possible implementation of the 5th aspect, second of possible implementation of the 5th aspect, the third possible implementation of the 5th aspect, the 4th kind of possible implementation of the 5th aspect or the 5th aspect, in the 6th kind of possible implementation, the MME also includes：

3rd module, for passing through the UE or evolved node B eNodeB, the global core network identifier CN ID of the IMSI and mobile services switching centre/visiting location register MSC/VLR are sent to the target second generation/third generation 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

With reference to the 6th kind of possible implementation of the 5th aspect, in the 7th kind of possible implementation, the 3rd module sends the IMSI and global CN ID by the eNodeB to the target 2G/3G base stations, including：

Notification message including the IMSI and the global CN ID is sent to the eNodeB, so that the IMSI and the global CN ID are sent to the target 2G/3G base stations by the eNodeB, wherein, the notification message is：Beep-page message or descending transmission message.

A kind of 6th aspect, mobile management entity MME, MME includes： Emitter, for sending request message to user equipment (UE), the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

Receiver, for being indicated in being used for of receiving that the UE sends after not preserving TMSI configured information in the UE, makes emitter be sent to the UE for indicating the IMSI instructions that the UE is responded using IMSI International Mobile Subscriber Identity IMSI.

With reference to the 6th aspect, in the first possible implementation, the request message is：Beep-page message or CS service announcements message.

With reference to the first possible implementation of the 6th aspect, in second of possible implementation, the beep-page message also includes the S-TMSI of the UE;Or, the CS service announcements message also includes paging and identifies cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

With reference to the first possible implementation or second of possible implementation of the 6th aspect of the 6th aspect, in the third possible implementation, if the request message is the CS service announcements message and the UE is in Idle state, emitter is additionally operable to：

Packet switched ps domain beep-page message is sent to the UE using the S-TMSI of the UE, so that the UE enters connected state, wherein, the core net CN domains in the ps domain beep-page message are PS.

With reference to the third possible implementation of the 6th aspect, the first possible implementation of the 6th aspect, second of possible implementation of the 6th aspect or the 6th aspect, in the 4th kind of possible implementation, what receiver received that the UE sends is used to indicate not preserving TMSI configured information in the UE, including：

Receive the configured information carried in the request message of activating business that the UE is sent, the request message of activating business for indicating not preserve TMSI in the UE.

With reference to the 4th kind of possible implementation of the 6th aspect, in the 5th kind of possible implementation, the configured information is CSFB responses.

With reference to the 6th aspect, the 6th aspect the first possible implementation, the 6th aspect second of possible implementation, the 6th aspect the third possible implementation, the 6th aspect the 4th kind can 5th kind of possible implementation of the implementation of energy or the 6th aspect, in the 6th kind of possible implementation, emitter is additionally operable to：

Pass through the UE or evolved node B eNodeB, the global core network identifier CN ID of the IMSI and mobile services switching centre/visiting location register MSC/VLR are sent to the target second generation/third generation 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

With reference to the 6th kind of possible implementation of the 6th aspect, in the 7th kind of possible implementation, emitter sends the IMSI and global CN ID by the eNodeB to the target 2G/3G base stations, including：

Notification message including the IMSI and the global CN ID is sent to the eNodeB, so that the IMSI and the global CN ID are sent to the target 2G/3G base stations by the eNodeB, wherein, the notification message is：Beep-page message or descending transmission message.

In method and apparatus provided in an embodiment of the present invention, due to when UE does not preserve TMSI, the configured information for indicating not preserve TMSI in the UE is sent to MME, so that MME is returned for indicating that UE is indicated using the IMSI IMSI responded, so as to, the IMSI that UE can be returned according to MME is indicated, is responded in CSFB flows using the IMSI of the UE.So, although do not preserve TMSI in UE, but in CSFB flows, the IMSI of the UE can be used to be responded, so as to avoid descending CS service fails.Brief description of the drawings

A kind of downstream circuitry for MME sides that Fig. 1 provides for the present invention exchanges the paging processing method flow chart for falling CSFB after rise；

A kind of downstream circuitry for UE sides that Fig. 2 provides for the present invention exchanges the paging processing method flow chart for falling CSFB after rise；

The flow chart for the embodiment one that Fig. 3 provides for the present invention；

The flow chart for the embodiment two that Fig. 4 provides for the present invention；

The flow chart for the embodiment three that Fig. 5 provides for the present invention； The schematic diagram for the user equipment (UE) that Fig. 6 provides for the present invention；

The schematic diagram for the user equipment (UE) that Fig. 7 provides for the present invention；

The schematic diagram for the mobile management entity MME that Fig. 8 provides for the present invention；

The schematic diagram for the mobile management entity MME that Fig. 9 provides for the present invention.Embodiment

The embodiment of the present invention is described in further detail with reference to Figure of description.It should be appreciated that embodiment described herein is merely to illustrate and explain the present invention, it is not intended to limit the present invention, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made should all belong to the scope of protection of the invention.

In embodiments of the present invention, user equipment (UE) (User Equipment) can for it is following any one, and UE can be static or moves.UE can include but is not limited to：Platform (Station), mobile station（Mobile Station), subscriber unit（Subscriber Unit), PC (Personal Computer), the electric moon on knee mu (Laptop Computer), the electric moon mu (Tablet Computer) of flat board, net book (Netbook), UE (Terminal), cell phone（Cellular Phone), handheld device（), Handheld wireless phone（Cordless Phone), personal digital assistant（Personal Digital Assistant, abbreviation PDA), data card（Data Card), USB insertions equipment, mobile WiFi hotspot devices（MiFi Devices), intelligent watch, intelligent glasses, radio modem（Modem), wireless router, WLL（Wireless Local Loop, abbreviation WLL) platform etc..Above-mentioned UE can be distributed in whole wireless network.Moving exchanging center MSC generally closes with VLR Visitor Location Register VLR and is set to same network element, referred to as MSC/VLR, or referred to as VLR.

In embodiments of the present invention, evolved node B eNodeB, are the base stations that E-UTRAN access services are provided for UE.The second generation/third generation 2G/3G base stations can be base station sub-system (the Base Station Subsystem in 2G networks, BSS), or the RNS (Radio Network Subsystem, RNS) in 3G networks.

The present inventor is had found under study for action, during combined registering, and MSC/VLR may be initiated temporarily Mobile user identification（Temporary Mobile Subscriber Identity, abbreviation TMSI) allocation flow, be UE distribution TMSI.Deploying MSC/VLR resource pools（MSC Pool) scene under, in same position region（Location Area) in can there are multiple MSC/VLR to provide service for UE.In order to be able to uniquely identify the different MSC/VLR in same MSC Pool, during combined registering, MSC/VLR is usually the network resource identifier that UE distribution contains registered MSC/VLR（Network Resource Identifier, abbreviation NRI) TMSI.UE preserves the TMSI that MSC/VLR is distributed in register flow path.

After combined registering success, in the downlink page of follow-up descending CS business triggering, MSC/VLR performs following paging policy：If MSC/VLR, which is the UE, is assigned with TMSI, MSC/VLR initiates the SGs interface pagings to MME using TMSI；If MSC/VLR does not distribute TMSI for the UE, MSC/VLR uses IMSI International Mobile Subscriber Identity（International Mobile Subscriber Identity, abbreviation IMSI) initiate to arrive MME SGs interface pagings.MME performs following paging policy after SGs interface pagings are received：If SGs interfaces use TMSI pagings, MME uses S-TMSI pagings UE;If SGs interfaces use IMSI pagings, MME uses IMSI pagings UE.UE after execution CSFB flows fall back to 2G/3G CS domains, performs following response policy after MME paging request is received：If receiving S-TMSI pagings, responded using TMSI；If receiving IMSI pagings, responded using IMSI.

In the case where deploying MSC Pool scene, service is provided due to that there can be multiple MSC/VLR in same position region for UE, now, if UE is responded using IMSI, the base station of 2G/3G networks（BSS/RNS it) cannot ensure to be routed to page response into the MSC/VLR for initiating paging, be easily caused called CS service fails.In order to solve the problem, prior art have modified the paging policy on MME, i.e. no matter MSC/VLR carries out paging on SGs interfaces using IMSI or TMSI, MME is unified under any scene uses S-TMSI pagings UE, so that UE carries out page response after 2G/3G CS domains are fallen back to using TMSI.

But, MSC/VLR still can use IMSI progress SGs interface pagings under following two scenes：(1) according to the SGs interface paging strategies set on MSC/VLR, SGs interface pagings are carried out using IMSI.For example, paging policy is：First time paging uses TMSI, if paging failure, second of paging TMSI is continuing with, if also failing, IMSI is used in third time paging instead.（2) the TMSI allocation flows failure that if MSC/VLR is initiated, MSC/VLR thinks that states of the newly assigned TMSI in UE sides is unreliable, now, MSC/VLR can still use IMSI to carry out SGs interface pagings.If MME is unified to use S-TMSI paging UE, according to current UE response policy, if without TMSI is preserved in UE, the UE does not respond to the S-TMSI pagings of MME initiations, also results in the called failures of CS.

The embodiment of the present invention goes for following two application scenarios：

Under the first application scenarios is non-MSC pool scenes, because MME indicates that UE is responded after CS domains network is fallen back to using TMSI, and legal TMSI is not preserved in the UE so that UE is not responding to the S-TMSI pagings of MME initiations, so as to cause descending CS service fails；

Under second of application scenarios is MSC pool scenes, because MME indicates that UE is responded after CS domains network is fallen back to using TMSI, and legal TMSI is not preserved in the UE so that UE is not responding to the S-TMSI pagings of MME initiations, so as to cause descending CS service fails.

It there is problems under second of application scenarios：It is multiple due to that can have in same position region

MSC/VLR provides service for UE, now, if UE is responded using IMSI, the base station of 2G/3G networks（BSS/RNS it) cannot ensure to be routed to page response into the MSC/VLR for initiating paging, be easily caused called CS service fails.

A kind of downstream circuitry of UE sides provided in an embodiment of the present invention exchanges the paging processing method for falling CSFB after rise, as shown in figure 1, this method includes：

Sll, UE receive the request message that MME is sent, and the request message is used to ask the UE to initiate CSFB flows and responded using TMSI after CS domains network is fallen back to；

If the 512, UE does not preserve TMSI, UE sends the configured information for indicating not preserve TMSI in the UE to MME, so that MME is returned for indicating that the IMSI that the UE IMSI are responded is indicated；

513rd, the IMSI that UE is returned according to MME is indicated, being sent in CSFB flows to target 2G/3G base stations includes the IMSI of itself page response.

Wherein, the page response is the response message for asking MME UE to initiate CSFB flows.

In the embodiment of the present invention, due to when UE does not preserve TMSI, the configured information for indicating not preserve TMSI in the UE is sent to MME, so that MME is returned for indicating that UE is carried out using IMSI The IMSI instructions of response, so that, the IMSI that UE can be returned according to MME is indicated, is responded in CSFB flows using the IMSI of the UE.So, although do not preserve TMSI in UE, but in CSFB flows, the IMSI of the UE can be used to be responded, so as to avoid descending CS service fails.

Illustrate the processing procedure of the embodiment of the present invention from above two application scenarios separately below.

Under the first application scenarios, in S11, when UE receives the request message that MME is sent, according to the difference of UE current states, further again including following two preferred implementations：

If the first, UE is in Idle state, and the request message is the S-TMSI for including the UE in beep-page message for paging UE, the beep-page message;

Under which, UE receives MME by providing the S-TMSL for being used in paging UE beep-page message, the beep-page message carry the UE that the eNodeB of service is sent for the UE

Specifically, MME sends the beep-page message for the paging UE to the eNodeB that service is provided for the UE, UE S-TMSI is included in the beep-page message, so that the S-TMSI of the UE is sent to the UE by eNodeB by the beep-page message of eating dishes without rice or wine for the paging UE, so that the UE is responded after CS domains network is fallen back to using the TMSI of the UE.

Under which, the core net in the beep-page message that MME is sent to eNodeB（Core Network, CN) domain is set to " CS "；CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE is in connected state, the request message is CS service announcements message, and the CS service announcements message includes paging mark（Paging identity) cell, the value of paging mark cell is for indicating that the UE uses TMSI progress page responses.

Under which, UE receives CS service announcements message of the MME by existing bottom signaling connection transmission between the UE.

Under second of application scenarios, request message also includes MSC/VLR global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.Accordingly, in SI 1, when UE receives the request message that MME is sent, according to the difference of UE current states, further again including following three kinds of preferred implementations：

If the first, UE is in Idle state, the request message that UE is received is beep-page message, the beep-page message Include the S-TMSI and MSC/VLR of the UE global CN ID, the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Wherein, the beep-page message includes the beep-page message that MME is sent to the eNodeB for UE services, and the eNodeB is sent to UE beep-page message（Such as eat dishes without rice or wine beep-page message）.

Under which, MME to eNodeB send beep-page message, and in the beep-page message comprising the UE S-TMSI and MSC/VLR global CN ID so that UE S-TMSI and the MSC/VLR global CN ID are sent to the UE by eNodeB.ENodeB is after the S-TMSI and MSC/VLR that carry the UE global CN ID of MME transmissions beep-page message is received, send and eat dishes without rice or wine beep-page message to UE, and carry in this eats dishes without rice or wine beep-page message the S-TMSI and the MSC/VLR of the UE global CN ID.

Under which, the CN domains in the beep-page message that MME is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE be in Idle state, the UE receive MME transmission request message before, in addition to：

UE receives the packet switch that MME is sent using the S-TMSI of the UE（Packet Switch, PS) after the beep-page message of domain, enter connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

It is set to " PS " specifically, MME sends the CN domains in beep-page message for paging UE, the beep-page message using S-TMSI to eNodeB.Accordingly, eNodeB sends CN domains in beep-page message of eating dishes without rice or wine for paging UE, the beep-page message of eating dishes without rice or wine to UE using S-TMSI and is set to " PS ".Accordingly, UE is received after the beep-page message of eating dishes without rice or wine, and service request is sent to MME by eNodeB（Service Request) message responded, and now, the state of the UE switchs to connected state by Idle state.

Under which, after the UE enters connected state, receive the request message that MME is sent, the request message is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools. Specially：UE enters after connected state, receive the CS service announcements message that MME utilizes existing bottom signaling connection to be sent to the UE, cell and MSC/VLR global CN ID are identified comprising paging in the message, the value of paging mark cell is used to indicate to carry out page response using TMSI.

Under which, the UE of Idle state is first switched to connected state by MME, then the global CN ID that paging is identified into cell and MSC/VLR are sent to the UE, so as to avoid increasing the length for beep-page message of eating dishes without rice or wine and increasing unnecessary paging time delay and paging resource overhead.

If the 3, UE is in connected state, the request message that UE is received is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Specifically, UE receives the CS service announcements message that MME utilizes existing bottom signaling connection to be sent to the UE, the message includes paging mark cell and MSC/VLR global CN ID.

It should be noted that, MSC/VLR global CN ID are defined by operator, it is configured by O＆M mode, MSC/VLR global CN ID include public land mobile network mark (the Public Land Mobile Network Identifier of operator, PLMN ID) MSC/VLR can be uniquely identified in operator PLMN with MSC/VLR CN ID, MSC/VLR global CN ID.Typically, in the case where deploying MSC Pool scenes, MSC/VLR can carry the global CN ID of itself in SGs beep-page messages.

Under second of application scenarios, it is preferred that this method also includes：

UE sends the IMSI and the MSC/VLR of the UE global CN ID in CSFB flows to target 2G/3G base stations, so that the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID of the MSC/VLR.

Under second of application scenarios, it is preferred that in S11, UE is received after the request message that MME is sent, and this method also includes：UE Slow deposit the MSC/VLR received global CN ID;

In S13, UE is sent to 2G/3G base stations after the page response for the IMSI for including the UE, and this method also includes：UE deletes the global CN ID for the MSC/VLR that Slow has been deposited.

Specifically, after CS signaling connections are successfully established, UE performs CS in target side 2G/3G CS domains Business；After the CS service endings, the UE can delete the MSC/VLR overall situation CN ID that Slow is deposited.Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, UE initiates CSFB flows and is specially：The UE sends request of activating business to MME（Extended Service Request) message, the CSFB falling flows of triggering MME initiations to eNodeB, it is prior art that whole CSFB, which falls flow after rise, referring specifically to the agreements of 3GPP TS 23.272.

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, it is preferred that in S12, UE sends the configured information for indicating not preserve TMSI in the UE to MME, including：

UE is sent to MME and activated business request message, and the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

It is preferred that the configured information is CSFB responses（ CSFB response value ).

Based on same inventive concept, a kind of downstream circuitry of MME sides provided in an embodiment of the present invention exchanges the paging processing method for falling CSFB after rise, as shown in Fig. 2 this method includes：

S21, MME send request message to UE, and the request message is used to ask UE to initiate CSFB flows and responded using TMSI after CS domains network is fallen back to；

S22, MME receive UE transmissions be used to indicate not preserve TMSI configured information in the UE after, sent to UE for indicating the IMSI instructions that the UE is responded using IMSI.

In the embodiment of the present invention, due to MME receive UE transmissions be used to indicate not preserve TMSI configured information in the UE after, sent to the UE for indicating that the UE is indicated using the IMSI IMSI responded, so that UE is after CS domains network is fallen back to, if not preserving TMSI in the UE, the IMSI of the UE can also be used to be responded, so as to avoid descending CS service fails.

Illustrate the processing procedure of the embodiment of the present invention from above two application scenarios separately below.

Different according to state current UE under the first application scenarios, the request message that MME is sent to UE in S21 is also different, specifically includes following two preferred implementations：

If the first, UE is in Idle state, the request message is the beep-page message for paging UE, and the beep-page message includes UE S-TMSI;

Specifically, MME sends the S-TMSI for including UE in the beep-page message for the paging UE, the beep-page message to the eNodeB that service is provided for the UE, so that eNodeB passes through for the paging UE Beep-page message of eating dishes without rice or wine the S-TMSI of the UE is sent to the UE so that the UE is responded after CS domains network is fallen back to using the TMSI of the UE.

Under which, the CN domains in the beep-page message that MME is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE is in connected state, the request message is CS service announcements message, and the CS service announcements message includes paging mark（Paging identity) cell, the value of paging mark cell is for indicating that the UE uses TMSI progress page responses.

Specifically, MME sends CS service announcements message by existing bottom signaling connection between UE to the UE.

Under second of application scenarios, request message also includes MSC/VLR global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.Accordingly, different according to state current UE, the request message that MME is sent to UE in S21 is also different, specifically includes following two preferred implementations：

If the first, UE is in Idle state, the request message that MME is sent to UE is beep-page message, the beep-page message includes the S-TMSI and MSC/VLR of the UE global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Wherein, the beep-page message includes the beep-page message that MME is sent to the eNodeB for UE services, and the eNodeB is sent to UE beep-page message（Such as eat dishes without rice or wine beep-page message）.

Specifically, MME sends the beep-page message for paging UE to eNodeB, S-TMSI comprising UE and the MSC/VLR of initiation paging global CN ID in the beep-page message, so that UE S-TMSI and the global CN ID are sent to the UE by eNodeB by the beep-page message of eating dishes without rice or wine for paging UE.ENodeB is after the S-TMSI and MSC/VLR that carry the UE global CN ID of MME transmissions beep-page message is received, send and eat dishes without rice or wine beep-page message to UE, and carry in this eats dishes without rice or wine beep-page message the S-TMSI and the MSC/VLR of the UE global CN ID.

Under this method, the CN domains in the beep-page message that MME is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE is in Idle state, MME is sent to UE before request message, in addition to： MME Ps domain beep-page message is sent to UE using UE S-TMSI, so that UE enters connected state, wherein, the CN domains in ps domain beep-page message are PS.

It is set to " PS " specifically, MME sends the CN domains in beep-page message for paging UE, the beep-page message using S-TMSI to eNodeB.Accordingly, eNodeB sends CN domains in beep-page message of eating dishes without rice or wine for paging UE, the beep-page message of eating dishes without rice or wine to UE using S-TMSI and is set to " PS ".Accordingly, UE is received after the beep-page message of eating dishes without rice or wine, and service request is sent to MME by eNodeB（Service Request) message responded, and now, the state of the UE switchs to connected state by Idle state.

Under which, after UE enters connected state, MME is CS service announcements message to the UE request messages sent, and the CS service announcements message includes paging mark（Paging identity) cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Under which, the UE of Idle state is first switched to connected state by MME, then the global CN ID that paging is identified into cell and MSC/VLR are sent to the UE, so as to avoid increasing the length for beep-page message of eating dishes without rice or wine and increasing unnecessary paging time delay and paging resource overhead.

If the 3, UE is in connected state, the request message that MME is sent to UE is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Specifically, Μ Μ Ε send the global CN ID comprising paging mark cell and MSC/VLR in CS service announcements message, the CS service announcements message using existing bottom signaling connection to the UE.

Under second of application scenarios, it is preferred that this method also includes：

MME passes through UE or eNodeB, the IMSI and the global CN ID of the UE is sent to target 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

It is preferred that MME sends the IMSI and MSC/VLR of the UE global CN ID by eNodeB to target 2G/3G base stations, including： IMSI including the UE and MSC/VLR global CN ID notification message is sent to the eNodeB by MME, so that the IMSI of the UE and MSC/VLR global CN ID are sent to the target 2G/3G base stations by the eNodeB, wherein, the notification message is：Beep-page message or descending transmission message.

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, it is preferred that in S22, what MME receptions UE was sent is used to indicate not preserving TMSI configured information in the UE, including：

MME receives the request message of activating business that UE is sent, and the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

It is preferred that the configured information is CSFB responses（ CSFB response value ).

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, it is preferred that in S22, MME is sent for indicating that the UE is indicated using the IMSI IMSI responded to UE, including：

MME sends CS service announcements message to UE, and the CS service announcements message includes being used to indicate that the UE is indicated using the IMSI IMSI responded.

It should be noted that MME can pass through existing signaling when being sent to UE for indicating that the UE is indicated using the IMSI IMSI responded（Such as CS service announcements message）Send, can also be sent by the signaling newly defined between MME and UE.

With reference to three specific embodiments, MSC/VLR, MME, eNodeB, UE, 2G/3G base station in the method provided the present invention（BSS/RNS interaction) is described in detail.

Embodiment one, as shown in figure 3, the flow of the present embodiment is as follows：

1. UE initiates joint attachment flow or co-location more new technological process, registered in EPC network PS fields MME and 2G/3G network C S domains MSC/VLR successful combinations.

2. MSC/VLR is after descending CS service requests are received, initiate to carry MSC/VLR global CN ID in the paging request to the SGs MME associated, the paging request using UE IMSI or TMSI.

3. MME is after the SGs paging requests of MSC/VLR transmissions are received, different operations are performed according to state current UE：If UE is currently at Idle state, step 3b or 3c are performed;If UE is currently at connected state, step 3d is performed. 3b. MME are set to " CS " to the eNodeB CN domains sent in beep-page message, the beep-page message in the S-TMSI comprising the UE and global CN ID from the MSC/VLR MSC/VLR received, the beep-page message.

Accordingly, UE S-TMSI and MSC/VLR global CN ID are transmitted to UE by eNodeB in beep-page message of eating dishes without rice or wine, and CN domains are set to " CS " in the beep-page message of eating dishes without rice or wine.

3c. MME send the CN domains in beep-page message, the beep-page message to eNodeB using S-TMSI and are set to " PS ".

Accordingly, eNodeB sends CN domains in beep-page message of eating dishes without rice or wine, the beep-page message of eating dishes without rice or wine to UE using S-TMSI and is set to " PS ".UE is received after the beep-page message of eating dishes without rice or wine, and service request is sent to MME（Service Request) message responded.UE enters after connected state, MME sends CS service announcements message using existing bottom signaling connection to UE, cell and the global CN ID from the MSC/VLR MSC/VLR received are identified comprising paging in the message, the value of paging mark cell is used to indicate that the UE carries out page response using TMSI.It should be noted that, MME is that " PS " initiates paging with CN domains using S-TMSI in the step, UE is first mainly changed into connected state from Idle state, increase unnecessary paging time delay and paging resource overhead to avoid the carrying MSC/VLR global CN ID directly in beep-page message, because MSC/VLR global CN ID length is 5 bytes.

3d. MME send CS service announcements message by existing bottom signaling connection between UE to UE, cell and the global CN ID from the MSC/VLR MSC/VLR received are identified comprising paging in the CS service announcements message, the value of paging mark cell is used to indicate that the UE carries out page response using TMSI.

4. UE is after the CS service announcements message for receiving S-TMSI beep-page messages or being indicated comprising TMSI, Slow deposits the MSC/VLR received global CN ID.If not preserving legal TMSI in UE, step 4a is performed;

4a.UE explicitly informs MME, and it does not have legal TMSI.

Specifically, UE can send request of activating business to MME（Extended Service Request) message, the configured information for indicating not preserve legal TMSI in the UE is carried in the message.Typically, the configured information can be CSFB responses（ CSFB response value ). 5. MME is not after legal TMSI is preserved in learning UE, CS service announcements message is sent to the UE by existing bottom signaling connection between the UE, cell is identified comprising paging in the CS service announcements Messages Messages, the value of paging mark cell is used to indicate that the UE carries out page response using IMSI.

6. UE is after CS service announcements message is received, CSFB flows are initiated.

Specifically, UE sends request of activating business to MME（Extended Service Request) message, the CSFB falling flows of triggering MME initiations to eNodeB.It is prior art that whole CSFB, which falls flow after rise, be will not be repeated here.

7. UE is after 2G/3G CS domains are successfully fallen back to, due to have received the CS service announcements message indicated comprising IMSI in steps of 5, UE can use IMSI to carry out page response, while UE carries the global CN ID for MSC/VLR that Slow is deposited to BSS/RNS in page response.

8. BSS/RNS is after IMSI page responses are received, selected to service MSC/VLR according to the MSC/VLR carried in the page response global CN ID.Because MSC/VLR global CN ID can uniquely identify a MSC/VLR in operator PLMN, under the scene for being included in MSC pool, therefore may insure that page response is routed to the MSC/VLR for initiating SGs pagings by BSS/RNS, so as to avoid the failure of descending CS business.

9. after CS signaling connections are successfully established, UE performs CS business in target side 2G/3G CS domains.Alternatively, after the CS service endings, UE can delete the global CN ID for the MSC/VLR that Slow is deposited.

Embodiment two, as shown in figure 4, the flow of the present embodiment is as follows：

1. UE initiates joint attachment flow or co-location more new technological process, registered in EPC network PS fields MME and 2G/3G network C S domains MSC/VLR successful combinations.

2. MSC/VLR is after descending CS service requests are received, initiate to carry MSC/VLR global CN ID in the paging request to the SGs MME associated, the paging request using UE IMSI or TMSI.Meanwhile, UE IMSI and MSC/VLR global CN ID are sent to all BSS/RNS in MSC/VLR service ranges by MSC/VLR.Specifically, UE IMSI and MSC/VLR global CN ID are sent to BSS/RNS by MSC/VLR by existing descending A/Iu interface messages or the A/Iu interface messages newly defined, and the specific sending method present invention is not limited. Accordingly, BSS/RNS Slow deposit UE IMSI and MSC/VLR global CN ID.Specifically, BSS/RNS can set up UE IMSI and MSC/VLR global CN ID mapping relations.Alternatively, BSS/RNS can start a timer after UE IMSI and MSC/VLR global CN ID are received, and the UE of preservation IMSI and MSC/VLR global CN ID can be removed in timer expiry.The setting of the timer duration is set by operator, or uses default value.

3. MME is after the SGs paging request messages of MSC/VLR transmissions are received, different operations are performed according to state current UE：If UE is currently at Idle state, step 3b is performed;If UE is currently at connected state, step 3c is performed.

The CN domains that 3b. MME are sent to eNodeB in the S-TMSI for including UE in beep-page message, the beep-page message, the beep-page message are set to " CS ".

Accordingly, eNodeB sends the S-TMSI for including UE in beep-page message of eating dishes without rice or wine, the beep-page message of eating dishes without rice or wine to UE, and its CN domain is set to " CS ";

3c. MME are sent comprising paging mark cell in CS service announcements message, the CS service announcements message by existing bottom signaling connection between UE to UE, and the value of paging mark cell is used to indicate that the UE carries out page response using TMSI.

4. UE is after the CS service announcements message for receiving S-TMSI beep-page messages or being indicated comprising TMSI, if not preserving legal TMSI in the UE, the UE explicitly informs MME, and it does not have legal TMSI.

Specifically, UE can send request of activating business to MME（Extended Service Request) message, the configured information for indicating not preserve legal TMSI in the UE is carried in the message.Typically, the configured information can be CSFB responses（ CSFB response value ).

5. MME is not after legal TMSI is preserved in learning UE, CS service announcements message is sent to the UE by existing bottom signaling connection between the UE, cell is identified comprising paging in the CS service announcements Messages Messages, the value of paging mark cell is used to indicate that the UE carries out page response using IMSI.

6. UE is after CS service announcements message is received, CSFB flows are initiated.

Specifically, UE sends request of activating business to MME（Extended Service Request) disappear Breath, triggering MME initiates to eNodeB CSFB to fall flow after rise.It is prior art that whole CSFB, which falls flow after rise, be will not be repeated here.

7. UE is after 2G/3G CS domains are successfully fallen back to, because have received the CS service announcements message indicated comprising IMSI in steps of 5, UE can use IMSI to carry out page response.

8. BSS/RNS is after IMSI page responses are received, obtain MSC/VLR global CN ID from the IMSI and MSC/VLR of preservation global CN ID mapping relations according to IMSI, and select to service MSC/VLR according to MSC/VLR global CN ID.Because MSC/VLR global CN ID can uniquely identify a MSC/VLR in operator PLMN, under the scene for being included in MSC pool, therefore may insure that page response is routed to the MSC/VLR for initiating SGs pagings by BSS/RNS, so as to avoid the failure of descending CS business.

9. after CS signaling connections are successfully established, UE performs CS business in target side 2G/3G CS domains.Above-mentioned two embodiment is solved under MSC pool scenes, and UE is not when having legal TMSI, the problem of UE, which is not responding to MME pagings, causes called CS service fails, also solve due to that there can be multiple MSC/VLR to provide service for UE in same position region, now, if UE is responded using IMSI, the base station of 2G/3G networks（BSS/RNS it) cannot ensure to be routed to page response into the MSC/VLR for initiating paging, the problem of being easily caused called CS service fails.

Embodiment three, as shown in figure 5, the flow of the present embodiment is as follows：

1. UE initiates joint attachment flow or co-location more new technological process, registered in EPC network PS fields MME and 2G/3G network C S domains MSC/VLR successful combinations.

2. MSC/VLR is after descending CS service requests are received, the paging request to the SGs MME associated is initiated using UE IMSI.

3. MME is after the SGs paging request messages of MSC/VLR transmissions are received, different operations are performed according to state current UE：If UE is currently at Idle state, step 3b is performed;If UE is currently at connected state, step 3c is performed.

3b. MME send the CN domains in beep-page message, the message to eNodeB using S-TMSI and are set to " CS ".Accordingly, eNodeB sends CN domains in beep-page message of eating dishes without rice or wine, the message to UE using S-TMSI and is set to " CS ". 3c. MME are sent comprising paging mark cell in CS service announcements message, the message by existing bottom signaling connection between UE to the UE, and the value of paging mark cell is used to indicate that the UE carries out page response using TMSI.

4. UE is after the CS service announcements message for receiving S-TMSI beep-page messages or being indicated comprising TMSI, if UE does not preserve legal TMSI, UE explicitly informs MME, and it does not have legal TMSI.

Specifically, UE can send request of activating business to MME（Extended Service Request) message, the configured information for indicating not preserve legal TMSI in UE is carried in the message.Typically, the configured information can be CSFB responses（ CSFB response value ).

5. MME is after knowing UE currently without legal TMSI, CS service announcements message is sent to the UE by existing bottom signaling connection between UE, cell is identified comprising paging in the message, the value of paging mark cell is used to indicate that the UE carries out page response using IMSI.

6. UE initiates CSFB flows after the beep-page message or CS service announcements message that CN domains are " CS " is received.

Specifically, UE sends request of activating business to MME（Extended Service Request) message, the CSFB falling flows of triggering MME initiations to eNodeB.It is prior art that whole CSFB, which falls flow after rise,.

7. UE is after 2G/3G CS domains are successfully fallen back to, because have received the CS service announcements message indicated comprising IMSI in steps of 5, UE can use IMSI to carry out page response.Page response is routed to selected MSC/VLR by BSS/RNS.

8. after CS signaling connections are successfully established, UE performs CS business in target side 2G/3G CS domains.The present embodiment is solved under non-MSC pool scenes and UE does not have during legal TMSI the problem of UE, which is not responding to MME pagings, causes called CS service fails.

Based on same inventive concept, a kind of user equipment (UE) provided in an embodiment of the present invention, as shown in fig. 6, the UE includes：

First module 61, request message for receiving MME transmissions, the request message is used to ask the UE belonging to the first module 61 to initiate circuit switching fall-back CSFB flows and responded after circuit-switched CS domain network is fallen back to using Temporary Mobile Subscriber Identity TMSI； Second unit 62, if the UE does not preserve TMSI, the configured information for indicating not preserve TMSI in the UE is sent to the MME, so that the MME is returned for indicating that the UE is indicated using the IMSI International Mobile Subscriber Identity IMSI IMSI responded；

Third unit 63, the IMSI for being returned according to the MME indicates that being sent in the CSFB flows to the target second generation/third generation 2G/3G base stations includes the page response of the IMSI.

Illustrate the processing procedure of the embodiment of the present invention from above two application scenarios separately below.

Under the first application scenarios, when first module 61 receives the request message that MME is sent, the difference of the UE current states according to belonging to itself, further again including following two preferred implementations：

Under which, first module 61 receives MME carries UE by being provided for UE S-TMSL in the beep-page message for paging UE that the eNodeB of service is sent, the beep-page message

Specifically, MME sends the beep-page message for the paging UE to the eNodeB that service is provided for UE, UE S-TMSI is included in the beep-page message, so that UE S-TMSI is sent to first module 61 by eNodeB by the beep-page message of eating dishes without rice or wine for the paging UE, so that third unit 63 is responded during CSFB using UE TMSI.

Under which, the CN domains in the beep-page message that MME is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to first module 61 are set to " CS ".

If the 2, UE is in connected state, the request message is CS service announcements message, and the CS service announcements message includes paging mark（Paging identity) cell, the value of paging mark cell is for indicating that UE uses TMSI progress page responses.

Under which, first module 61 receives CS service announcements message of the MME by existing bottom signaling connection transmission between the UE.

Under second of application scenarios, request message also includes MSC/VLR global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.Accordingly, when first module 61 receives the request message that MME is sent, according to the difference of UE current states, further again including following three kinds of preferred implementations：

If the first, UE is in Idle state, the request message that first module 61 is received is beep-page message, and the beep-page message includes UE S-TMSI and MSC/VLR global CN ID, and the MSC/VLR is It is located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.Wherein, the beep-page message includes the beep-page message that MME is sent to the eNodeB for UE services, and the eNodeB is sent to the beep-page message of first module 61（Such as eat dishes without rice or wine beep-page message）.

Under which, MME to eNodeB send beep-page message, and in the beep-page message comprising UE S-TMSI and MSC/VLR global CN ID so that UE S-TMSI and the MSC/VLR global CN ID are sent to UE by eNodeB.ENodeB is after the S-TMSI and MSC/VLR that carry the UE global CN ID of MME transmissions beep-page message is received, send and eat dishes without rice or wine beep-page message to first module 61, and carry in this eats dishes without rice or wine beep-page message UE S-TMSI and the MSC/VLR global CN ID.

Under which, the CN domains in the beep-page message that MME is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to first module 61 are set to " CS ".

If the 2, UE be in Idle state, first module 61 receive MME transmission request message before, in addition to：

First module 61 is received after ps domain beep-page messages of the MME using the S-TMSI transmissions of the UE, UE is entered connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

It is set to " PS " specifically, MME sends the CN domains in beep-page message for paging UE, the beep-page message using S-TMSI to eNodeB.Accordingly, eNodeB sends CN domains in beep-page message of eating dishes without rice or wine for paging UE, the beep-page message of eating dishes without rice or wine to first module 61 using S-TMSI and is set to " PS ".Accordingly, first module 61 is received after the beep-page message of eating dishes without rice or wine, and service request is sent to MME by eNodeB（Service Request) message responded, and now, UE state switchs to connected state by Idle state.

Under which, after UE enters connected state, first module 61 receives the request message that MME is sent, the request message is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

If the 3, UE is in connected state, the request message that first module 61 is received is CS service announcements Message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Specifically, first module 61 receives the CS service announcements message that MME utilizes existing bottom signaling connection to be sent to the UE, the message includes paging mark cell and MSC/VLR global CN ID.

Under second of application scenarios, it is preferred that third unit 63 is additionally operable to：

UE IMSI and the MSC/VLR global CN ID are sent to target 2G/3G base stations in CSFB flows, so that the target 2G/3G base stations are that UE determines the MSC/VLR according to the global CN ID of the MSC/VLR.

Under second of application scenarios, it is preferred that after the request message that the reception of first module 61 MME is sent, being additionally operable to：Slow deposits the MSC/VLR received global CN ID;

Third unit 63 is sent to 2G/3G base stations after the page response for the IMSI for including the UE, is additionally operable to：Delete the global CN ID for the MSC/VLR that Slow has been deposited.

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, it is preferred that second unit 62 sends the configured information for indicating not preserve TMSI in the UE to MME, including：

MME is sent and activated business request message, and the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

It is preferred that the configured information is CSFB responses（ CSFB response value ).

Based on same inventive concept, another user equipment (UE) provided in an embodiment of the present invention, as shown in fig. 7, the UE includes：

Transceiver 71, the request message for receiving MME transmissions, the request message is used to ask the UE belonging to itself to initiate CSFB flows and responded after CS domains network is fallen back to using TMSI；If the UE does not preserve TMSI, the configured information for indicating not preserve TMSI in the UE is sent to the MME, so that the MME is returned for indicating that the UE is indicated using the IMSI IMSI responded；

Processor 72, the IMSI for being returned according to the MME is indicated, in the CSFB flows, and transceiver 71 is sent to target 2G/3G base stations includes the page response of the IMSI. Wherein, connected between transceiver 71 and processor 72 using bus mode.

Illustrate the processing procedure of the embodiment of the present invention from above two application scenarios separately below.

Under the first application scenarios, when transceiver 71 receives the request message that MME is sent, the difference of the UE current states according to belonging to itself, further again including following two preferred implementations：

If the first, UE is in Idle state, and the request message is the S-TMSI for including the UE in beep-page message for paging UE, the beep-page message;

Under which, transceiver 71 receives MME carries UE by being provided for UE S-TMSL in the beep-page message for paging UE that the eNodeB of service is sent, the beep-page message

Under which, the core net in the beep-page message that MME is sent to eNodeB（Core Network, CN) domain is set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to transceiver 71 are set to " CS ".

If the 2, UE is in connected state, the request message is CS service announcements message, and the CS service announcements message includes paging mark（Paging identity) cell, the value of paging mark cell is for indicating that UE uses TMSI progress page responses.

Under which, transceiver 71 receives CS service announcements message of the MME by existing bottom signaling connection transmission between the UE.

Under second of application scenarios, request message also includes MSC/VLR global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.Accordingly, when transceiver 71 receives the request message that MME is sent, according to the difference of UE current states, further again including following three kinds of preferred implementations：

If the first, UE is in Idle state, the request message that transceiver 71 is received is beep-page message, the beep-page message includes UE S-TMSI and MSC/VLR global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Wherein, the beep-page message includes the beep-page message that MME is sent to the eNodeB for UE services, and the eNodeB is sent to the beep-page message of transceiver 71（Such as eat dishes without rice or wine beep-page message）.

Under which, MME to eNodeB send beep-page message, and in the beep-page message comprising UE S-TMSI and MSC/VLR global CN ID so that eNodeB by UE S-TMSI and should MSC/VLR global CN ID are sent to UE.ENodeB is after the S-TMSI and MSC/VLR that carry the UE global CN ID of MME transmissions beep-page message is received, send and eat dishes without rice or wine beep-page message to transceiver 71, and carry in this eats dishes without rice or wine beep-page message UE S-TMSI and the MSC/VLR global CN ID.

Under which, the CN domains in the beep-page message that MME is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to transceiver 71 are set to " CS ".

If the 2, UE is in Idle state, transceiver 71 is additionally operable to before the request message of MME transmissions is received：

Receive after ps domain beep-page messages of the MME using UE S-TMSI transmissions, UE is entered connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

It is set to " PS " specifically, MME sends the CN domains in beep-page message for paging UE, the beep-page message using S-TMSI to eNodeB.ENodeB sends CN domains in beep-page message of eating dishes without rice or wine for paging UE, the beep-page message of eating dishes without rice or wine to transceiver 71 using S-TMSI and is set to " PS ".Transceiver 71 is received after the beep-page message of eating dishes without rice or wine, and service request is sent to MME by eNodeB（Service Request) message responded, and now, UE state switchs to connected state by Idle state.

Under which, after UE enters connected state, transceiver 71 receives the request message that MME is sent, the request message is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

If the 3, UE is in connected state, the request message that transceiver 71 is received is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Specifically, transceiver 71 receives the CS service announcements message that MME utilizes existing bottom signaling connection to be sent to the UE, the message includes paging mark cell and MSC/VLR global CN ID.

Under second of application scenarios, it is preferred that transceiver 71 is additionally operable to： UE IMSI and the MSC/VLR global CN ID are sent to target 2G/3G base stations in CSFB flows, so that target 2G/3G base stations are that UE determines the MSC/VLR according to the global CN ID of the MSC/VLR.

Under second of application scenarios, it is preferred that after the request message that the reception of transceiver 71 MME is sent, processor 72 is additionally operable to：Slow deposits the MSC/VLR received global CN ID;

Transceiver 71 is sent to 2G/3G base stations after the page response for the IMSI for including the UE, and processor 72 is additionally operable to：Delete the global CN ID for the MSC/VLR that Slow has been deposited.

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, it is preferred that transceiver 71 sends the configured information for indicating not preserve TMSI in the UE to MME, be specially：Send and activate business request message to MME, the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

It is preferred that the configured information is CSFB responses（ CSFB response value ).

Based on same inventive concept, the embodiments of the invention provide a kind of MME, as shown in Fig. 8, the MME includes：

First module 81, for sending request message to user equipment (UE), the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

Second module 82, for being indicated in being used for of receiving that the UE sends after not preserving TMSI configured information in the UE, sends for indicating the IMSI instructions that the UE is responded using IMSI International Mobile Subscriber Identity IMSI to the UE.

Illustrate the processing procedure of the embodiment of the present invention from above two application scenarios separately below.

Different according to state current UE under the first application scenarios, the request message that the first module 81 is sent to UE is also different, specifically includes following two preferred implementations：

If the first, UE is in Idle state, the request message is the beep-page message for paging UE, and the beep-page message includes UE S-TMSI;

Specifically, the first module 81 sends the S-TMSI for including UE in the beep-page message for the paging UE, the beep-page message to the eNodeB that service is provided for the UE, so that eNodeB passes through for paging The S-TMSI of the UE is sent to the UE by the beep-page message of eating dishes without rice or wine of the UE, so that the UE is responded after CS domains network is fallen back to using the TMSI of the UE.

Under which, the CN domains in the beep-page message that the first module 81 is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE is in connected state, the request message is CS service announcements message, and the CS service announcements message includes paging mark（Paging identity) cell, the value of paging mark cell is for indicating that the UE uses TMSI progress page responses.

Specifically, the first module 81 sends CS service announcements message by existing bottom signaling connection between UE to the UE.

Under second of application scenarios, request message also includes MSC/VLR global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.Accordingly, different according to state current UE, the request message that the first module 81 is sent to UE is also different, specifically includes following two preferred implementations：

If the first, UE is in Idle state, the request message that first module 81 is sent to UE is beep-page message, the beep-page message includes the S-TMSI and MSC/VLR of the UE global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Wherein, the beep-page message includes the beep-page message that the first module 81 is sent to the eNodeB for UE services, and the eNodeB is sent to UE beep-page message（Such as eat dishes without rice or wine beep-page message）.

Specifically, first module 81 sends the beep-page message for paging UE to eNodeB, S-TMSI comprising UE and the MSC/VLR of initiation paging global CN ID in the beep-page message, so that UE S-TMSI and the global CN ID are sent to the UE by eNodeB by the beep-page message of eating dishes without rice or wine for paging UE.ENodeB is after the S-TMSI and MSC/VLR that carry the UE global CN ID of the first module 81 transmission beep-page message is received, send and eat dishes without rice or wine beep-page message to UE, and carry in this eats dishes without rice or wine beep-page message the S-TMSI and the MSC/VLR of the UE global CN ID.

Under this method, the CN domains in the beep-page message that the first module 81 is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE is in Idle state, the first module 81 is sent to UE before request message, in addition to： First module 81 sends ps domain beep-page message using UE S-TMSI to UE, so that UE enters connected state, wherein, the CN domains in ps domain beep-page message are PS.

It is set to " PS " specifically, the first module 81 sends the CN domains in beep-page message for paging UE, the beep-page message using S-TMSI to eNodeB.Accordingly, eNodeB sends CN domains in beep-page message of eating dishes without rice or wine for paging UE, the beep-page message of eating dishes without rice or wine to UE using S-TMSI and is set to " PS ".Accordingly, UE is received after the beep-page message of eating dishes without rice or wine, and sending service request (Service Request) message to MME by eNodeB is responded, and now, the state of the UE switchs to connected state by Idle state.

Under which, after UE enters connected state, the first module 81 is CS service announcements message to the UE request messages sent, and the CS service announcements message includes paging mark（Paging identity) cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

If the 3, UE is in connected state, the request message that first module 81 is sent to UE is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Specifically, the first module 81 sends the global CN ID comprising paging mark cell and MSC/VLR in CS service announcements message, the CS service announcements message using existing bottom signaling connection to the UE.

Under second of application scenarios, it is preferred that the MME also includes：

3rd module, for passing through UE or eNodeB, the IMSI and the global CN ID of the UE is sent to target 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

It is preferred that the 3rd module sends the IMSI and MSC/VLR of the UE global CN ID by eNodeB to target 2G/3G base stations, including：

IMSI including the UE and MSC/VLR global CN ID notification message is sent to the eNodeB, so that the IMSI of the UE and MSC/VLR global CN ID are sent to the target 2G/3G base stations by the eNodeB, wherein, the notification message is：Beep-page message or The descending transmission message of person.

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, it is preferred that the second module 82 receive UE send be used for indicate not preserving TMSI configured information in the UE, including：The request message of activating business that UE is sent is received, the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

It is preferred that the configured information is CSFB responses（ CSFB response value ).

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, is indicated it is preferred that the second module 82 sends the IMSI responded for indicating the UE using IMSI to UE, including：CS service announcements message is sent to UE, the CS service announcements message includes being used to indicate that the UE is indicated using the IMSI IMSI responded.

It should be noted that the second module 82 can pass through existing signaling when being sent to UE for indicating that the UE is indicated using the IMSI IMSI responded（Such as CS service announcements message）Send, can also be sent by the signaling newly defined between MME and UE.

Based on same inventive concept, the embodiment of the present invention additionally provides another MME, as shown in figure 9, the MME includes：

Emitter 91, for sending request message to user equipment (UE), the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

Receiver 92, it is used for for what is sent in the reception UE after indicating not preserve TMSI configured information in the UE, emitter 91 is sent to the UE for indicating that the UE is indicated using the IMSI International Mobile Subscriber Identity IMSI IMSI responded.

Wherein, connected between emitter 91 and receiver 92 by bus.

Illustrate the processing procedure of the embodiment of the present invention from above two application scenarios separately below.

Different according to state current UE under the first application scenarios, the request message that emitter 91 is sent to UE is also different, specifically includes following two preferred implementations：

If the first, UE is in Idle state, the request message is the beep-page message for paging UE, and the beep-page message includes UE S-TMSI; Specifically, emitter 91 sends the beep-page message for the paging UE to the eNodeB that service is provided for the UE, UE S-TMSI is included in the beep-page message, so that the S-TMSI of the UE is sent to the UE by eNodeB by the beep-page message of eating dishes without rice or wine for the paging UE, so that the UE is responded after CS domains network is fallen back to using the TMSI of the UE.

Under which, the CN domains in the beep-page message that emitter 91 is sent to eNodeB are set to " CS ";CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE is in connected state, the request message is CS service announcements message, and the CS service announcements message includes paging mark（Paging identity) cell, the value of paging mark cell is for indicating that the UE uses TMSI progress page responses.

Specifically, emitter 91 sends CS service announcements message by existing bottom signaling connection between UE to the UE.

Under second of application scenarios, request message also includes MSC/VLR global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.Accordingly, different according to state current UE, the request message that emitter 91 is sent to UE is also different, specifically includes following two preferred implementations：

If the first, UE is in Idle state, the request message that emitter 91 is sent to UE is beep-page message, the beep-page message includes the S-TMSI and MSC/VLR of the UE global CN ID, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Wherein, the beep-page message includes the beep-page message that emitter 91 is sent to the eNodeB for UE services, and the eNodeB is sent to UE beep-page message（Such as eat dishes without rice or wine beep-page message）.

Specifically, emitter 91 sends the beep-page message for paging UE to eNodeB, S-TMSI comprising UE and the MSC/VLR of initiation paging global CN ID in the beep-page message, so that UE S-TMSI and the global CN ID are sent to the UE by eNodeB by the beep-page message of eating dishes without rice or wine for paging UE.ENodeB is after the S-TMSI and MSC/VLR that carry the UE global CN ID of the transmission of emitter 91 beep-page message is received, send and eat dishes without rice or wine beep-page message to UE, and carry in this eats dishes without rice or wine beep-page message the S-TMSI and the MSC/VLR of the UE global CN ID.

Under this method, the CN domains in the beep-page message that emitter 91 is sent to eNodeB are set to " CS "; CN domains in the beep-page message of eating dishes without rice or wine that eNodeB is sent to UE are set to " CS ".

If the 2, UE is in Idle state, emitter 91 sends before request message to UE, is additionally operable to：Ps domain beep-page message is sent to UE using UE S-TMSI, so that UE enters connected state, wherein, the CN domains in ps domain beep-page message are PS.

It is set to " PS " specifically, emitter 91 sends the CN domains in beep-page message for paging UE, the beep-page message using S-TMSI to eNodeB.Accordingly, eNodeB sends CN domains in beep-page message of eating dishes without rice or wine for paging UE, the beep-page message of eating dishes without rice or wine to UE using S-TMSI and is set to " PS ".Accordingly, UE is received after the beep-page message of eating dishes without rice or wine, and service request is sent to MME by eNodeB（Service Request) message responded, and now, the state of the UE switchs to connected state by Idle state.

Under which, after UE enters connected state, emitter 91 is CS service announcements message to the UE request messages sent, and the CS service announcements message includes paging mark（Paging identity) cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

If the 3, UE is in connected state, the request message that emitter 91 is sent to UE is CS service announcements message, the CS service announcements message includes paging mark cell and MSC/VLR global CN ID, the value of paging mark cell is used for instruction and carries out page response using TMSI, and the MSC/VLR is to be located at for the UE MSC/VLR and the MSC/VLR for providing service in MSC resource pools.

Specifically, emitter 91 sends the global CN ID comprising paging mark cell and MSC/VLR in CS service announcements message, the CS service announcements message using existing bottom signaling connection to the UE.

Under second of application scenarios, it is preferred that emitter 91 is additionally operable to：

Pass through UE or eNodeB, the IMSI and the global CN ID of the UE is sent to target 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

It is preferred that emitter 91 sends the IMSI and MSC/VLR of the UE global CN ID by eNodeB to target 2G/3G base stations, including：

IMSI including the UE and MSC/VLR global CN ID notification message is sent To the eNodeB, so that the IMSI of the UE and MSC/VLR global CN ID are sent to the target 2G/3G base stations by the eNodeB, wherein, the notification message is：Beep-page message or descending transmission message.

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, it is preferred that receiver 92 receive UE send be used for indicate not preserving TMSI configured information in the UE, including：The request message of activating business that UE is sent is received, the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

It is preferred that the configured information is CSFB responses（ CSFB response value ).

Any embodiment based on the first above-mentioned application scenarios and second of application scenarios, is indicated it is preferred that emitter 91 sends the IMSI responded for indicating the UE using IMSI to UE, including：CS service announcements message is sent to UE, the CS service announcements message includes being used to indicate that the UE is indicated using the IMSI IMSI responded.

It should be noted that emitter 91 can pass through existing signaling when being sent to UE for indicating that the UE is indicated using the IMSI IMSI responded（Such as CS service announcements message）Send, can also be sent by the signaling newly defined between MME and UE.

It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program product.Therefore, the form of the embodiment in terms of the present invention can use complete hardware embodiment, complete software embodiment or combine software and hardware.Moreover, the present invention can be used (includes but is not limited to magnetic disk storage, CD-ROM, optical memory etc. in one or more computer-usable storage mediums for wherein including computer usable program code）The form of the computer program product of upper implementation.

The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow chart and/or block diagram of computer program product are described.It should be understood that can by the flow in each flow and/or square frame and flow chart and/or block diagram in computer program instructions implementation process figure and/or block diagram and/or square frame combination.These computer program instructions can be provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices to produce a machine so that producing by the instruction of the computing device of computer or other programmable data processing devices is used to realize the function of specifying in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames Device.

These computer program instructions may be alternatively stored in the computer-readable memory that computer or other programmable data processing devices can be guided to work in a specific way, so that the instruction being stored in the computer-readable memory, which is produced, includes the manufacture of command device, the command device realizes the function of being specified in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices, so that series of operation steps is performed on computer or other programmable devices to produce computer implemented processing, so that the instruction performed on computer or other programmable devices provides the step of being used to realize the function of specifying in one flow of flow chart or multiple flows and/or one square frame of block diagram or multiple square frames.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creative concept, then other change and modification can be made to these embodiments.So, appended claims are intended to be construed to include preferred embodiment and fall into having altered and changing for the scope of the invention.The spirit and scope of invention.So, if these modifications and variations of the present invention belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to comprising including these changes and modification.

Claims (12)

1. Claim

   1st, a kind of downstream circuitry exchanges the paging processing method for falling CSFB after rise, it is characterised in that this method includes：

   User equipment (UE) receives the request message that mobile management entity MME is sent, and the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

   If the UE does not preserve TMSI, the UE sends the configured information for indicating not preserve TMSI in the UE to the MME, so that the MME is returned for indicating that the UE is indicated using the IMSI International Mobile Subscriber Identity IMSI IMSI responded；

   The IMSI that the UE is returned according to the MME indicates that being sent in the CSFB flows to the target second generation/third generation 2G/3G base stations includes the page response of the IMSI.

   2nd, the method as described in claim 1, it is characterised in that the request message is：Beep-page message or CS service announcements message.

   3rd, method as claimed in claim 2, it is characterised in that

   The beep-page message includes the S-TMSI of the UE;Or

   The CS service announcements message includes paging mark cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

   4th, method as claimed in claim 2 or claim 3, it is characterised in that if the request message is the CS service announcements message and the UE is in Idle state, methods described also includes：

   The UE is received after packet switched ps domain beep-page messages of the MME using UE S-TMSI transmissions, enters connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

   5th, the method as described in any one of claim 1 ~ 4, it is characterised in that the UE sends the configured information for indicating not preserve TMSI in the UE to the MME, including：

   The UE is sent to the MME and activated business request message, and the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

   6th, method as claimed in claim 5, it is characterised in that the configured information responds for CSFB Value.

   7th, the method as described in any one of claim 1 ~ 6, it is characterized in that, if the request message also includes mobile services switching centre/visiting location register MSC/VLR global core network identifier CN ID, the MSC/VLR is located in MSC resource pools, and this method also includes：

   The UE sends the IMSI and the global CN ID of the UE in the CSFB flows to the target 2G/3G base stations, so that the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

   8th, a kind of downstream circuitry exchanges the paging processing method for falling CSFB after rise, it is characterised in that this method includes：

   Mobile management entity MME sends request message to user equipment (UE), and the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

   The MME is indicated in being used for of receiving that the UE sends after not preserving TMSI configured information in the UE, is sent to the UE for indicating the IMSI instructions that the UE is responded using IMSI International Mobile Subscriber Identity IMSI.

   9th, method as claimed in claim 8, it is characterised in that the request message is：Beep-page message or CS service announcements message.

   10th, method as claimed in claim 9, it is characterised in that

   The beep-page message also includes the S-TMSI of the UE;Or

   The CS service announcements message also includes paging and identifies cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

   11st, the method as described in claim 9 or 10, it is characterised in that if the request message is the CS service announcements message and the UE is in Idle state, methods described also includes：

   The MME sends packet switched ps domain beep-page message using the S-TMSI of the UE to the UE, so that the UE enters connected state, wherein, the core net CN domains in the ps domain beep-page message are PS.

   12nd, the method as described in any one of claim 8 ~ 11, it is characterised in that the MME is received To the UE send be used for indicate not preserving TMSI configured information in the UE, including：The MME receives the configured information carried in the request message of activating business that the UE is sent, the request message of activating business for indicating not preserve TMSI in the UE.

   13rd, method as claimed in claim 12, it is characterised in that the configured information is CSFB responses.

   14th, the method as described in any one of claim 8 ~ 13, it is characterised in that this method also includes：The MME passes through the UE or evolved node B eNodeB, the global core network identifier CN ID of the IMSI and mobile services switching centre/visiting location register MSC/VLR are sent to the target second generation/third generation 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

   15th, method as claimed in claim 14, it is characterised in that, the MME sends the IMSI and global CN ID by the eNodeB to the target 2G/3G base stations, including：

   Notification message including the IMSI and the global CN ID is sent to the eNodeB by the MME, so that the IMSI and the global CN ID are sent to the target 2G/3G base stations by the eNodeB, wherein, the notification message is：Beep-page message or descending transmission message.

   16th, a kind of user equipment (UE), it is characterised in that the UE includes：

   First module, request message for receiving mobile management entity MME transmission, the request message is used to ask the UE belonging to the first module to initiate circuit switching fall-back CSFB flows and responded after circuit-switched CS domain network is fallen back to using Temporary Mobile Subscriber Identity TMSI；

   Second unit, if the UE does not preserve TMSI, the configured information for indicating not preserve TMSI in the UE is sent to the MME, so that the MME is returned for indicating that the UE is indicated using the IMSI International Mobile Subscriber Identity IMSI IMSI responded；

   Third unit, the IMSI for being returned according to the MME indicates that being sent in the CSFB flows to the target second generation/third generation 2G/3G base stations includes the page response of the IMSI.

   17th, UE as claimed in claim 16, it is characterised in that the request message is：Beep-page message or CS service announcements message.

   18th, UE as claimed in claim 17, it is characterised in that The beep-page message includes the S-TMSI of the UE;Or

   The CS service announcements message includes paging mark cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

   19th, the UE as described in claim 17 or 18, it is characterised in that if the request message is the CS service announcements message and the UE is in Idle state, the first module is additionally operable to：

   After the packet switched ps domain beep-page message that the MME is sent using UE S-TMSI is received, the UE is set to enter connected state from Idle state, wherein, the CN domains in the ps domain beep-page message are PS.

   20th, the UE as described in any one of claim 16 ~ 19, it is characterised in that the second unit specifically for：

   Send and activate business request message to the MME, the configured information for indicating not preserve TMSI in the UE is carried in the request message of activating business.

   21st, UE as claimed in claim 20, it is characterised in that the configured information is CSFB responses.

   22nd, the UE as described in any one of claim 16 ~ 21, it is characterized in that, if the request message also includes mobile services switching centre/visiting location register MSC/VLR global core network identifier CN ID, the MSC/VLR is located in MSC resource pools, and the third unit is additionally operable to：

   The IMSI and the global CN ID of the UE is sent to the target 2G/3G base stations in the CSFB flows, so that the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

   23rd, a kind of mobile management entity MME, it is characterised in that the MME includes：

   First module, for sending request message to user equipment (UE), the request message is used to ask the UE to initiate circuit switching fall-back CSFB flows and responded using Temporary Mobile Subscriber Identity TMSI after circuit-switched CS domain network is fallen back to；

   Second module, for being indicated in being used for of receiving that the UE sends after not preserving TMSI configured information in the UE, sends for indicating the IMSI instructions that the UE is responded using IMSI International Mobile Subscriber Identity IMSI to the UE. 24th, MME as claimed in claim 23, it is characterised in that the request message is：Beep-page message or CS service announcements message.

   25th, MME as claimed in claim 24, it is characterised in that

   The beep-page message also includes the S-TMSI of the UE;Or

   The CS service announcements message also includes paging and identifies cell, and the value of the paging mark cell is used to indicate that the UE is responded using TMSI.

   26th, the MME as described in claim 24 or 25, it is characterised in that if the request message is the CS service announcements message and the UE is in Idle state, first module is additionally operable to：

   Packet switched ps domain beep-page message is sent to the UE using the S-TMSI of the UE, so that the UE enters connected state, wherein, the core net CN domains in the ps domain beep-page message are PS.

   27th, the MME as described in any one of claim 23 ~ 26, it is characterised in that what second module received that the UE sends is used to indicate not preserving TMSI configured information in the UE, including：Receive the configured information carried in the request message of activating business that the UE is sent, the request message of activating business for indicating not preserve TMSI in the UE.

   28th, MME as claimed in claim 27, it is characterised in that the configured information is CSFB responses.

   29th, the MME as described in any one of claim 23 ~ 28, it is characterised in that the MME also includes：

   3rd module, for passing through the UE or evolved node B eNodeB, the global core network identifier CN ID of the IMSI and mobile services switching centre/visiting location register MSC/VLR are sent to the target second generation/third generation 2G/3G base stations, so that the UE is fallen back to behind the target 2G/3G base stations, the target 2G/3G base stations are that the UE determines the MSC/VLR according to the global CN ID.

   30th, MME as claimed in claim 29, it is characterised in that the 3rd module sends the IMSI and global CN ID by the eNodeB to the target 2G/3G base stations, including：Notification message including the IMSI and the global CN ID is sent to the eNodeB, so that the IMSI and the global CN ID are sent to the target 2G/3G base stations by the eNodeB, Wherein, the notification message is：Beep-page message or descending transmission message.