CN103081535A

CN103081535A - Circuit-switched fallback processing method, device and system

Info

Publication number: CN103081535A
Application number: CN2011800017083A
Authority: CN
Inventors: 陈中平; 朱奋勤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-08-24
Filing date: 2011-08-24
Publication date: 2013-05-01
Also published as: WO2012162961A1

Abstract

The present invention relates to a CSFB processing method, device and system. One method includes a circuit-switched fallback processing method, characterized by including: receiving an extended service request message sent by user equipment, the extended service request message indicating a circuit-switched fallback service; when it is determined to reject the extended service request message, triggering the evolved universal terrestrial radio access network (E-UTRAN) to provide reselection information to the user equipment so that the user equipment falls back from the E-UTRAN to the global system for mobile communications radio access network(GERAN)/universal terrestrial radio access network (UTRAN) according to the reselection information. The method in the present invention can ensure the UE rapidly falls back to the GERAN/UTRAN to perform the CS service, reducing the time delay of CSFB and maintaining the service experience of the user.

Description

A kind of processing method of circuit switching fall-back, device and system

A kind of processing method of circuit switching fall-back, device and system technical field

The present invention relates to communication technical field, more particularly to a kind of processing method of circuit switching fall-back, device and system.Background technology

During network is to broadband, mobile development, 3GPP (The 3rd Generation Partnership Program, third generation partner program）LTE (Long Term Evolution, Long Term Evolution are proposed in Mobile Access Network）Scheme E-UTRAN (Evolved Universal Mobile Telecommunication System Territorial Radio Access Network, Evolved UTRAN);SAE (System Architecture Evolution, System Architecture Evolution) scheme EPC (Evolved Packet Core, evolution block core net) is proposed in core net.E-UTRAN and EPC constitute EPS (Evolved Packet System, evolved packet system）.UE (User Equipment, user equipment）E-UTRAN, UTRAN (Universal Mobile Telecommunication System Territorial Radio Access Network, universal land radio access web can be passed through）GERAN (GSM EDGE Radio Access Network, wherein GSM is global system for mobile communications Global System for Mobile communications, EDGE is Enhanced Data rates for GSM Evolution Enhanced Data Rate for GSM Evolution, is referred to as global mobile communication wireless access network by GERAN in present specification）In any one access way access EPC, wherein, the entity network element in E-UTRAN can be the node B (evolved Node B, eNB) or family eNB (Home eNode B, HeNB) of evolution.Fig. 1 is current radio gradual network structure figure.

Shown in Fig. 1, EPC is specifically including but not limited to MME (Mobility Management Entity, mobility management entity）, SGSN (Serving GPRS Support Node, Serving GPRS Support Node）, SGW (Serving Gateway, gateway) and PGW (PDN Gateway, block domain data net gateway）.Wherein, MME/SGSN is mainly responsible for NAS (Non Access Stratum, Non-Access Stratum） The function such as signaling management, bearer management and tracking and paging management under user's idle pulley；SGW is mainly responsible for the functions such as the mobility anchor point and Lawful Interception relevant information inside local mobility anchor point and 3GPP system；PGW is mainly responsible for strategy execution and charging and Lawful Interception correlation function.Wherein, MME and SGSN are referred to as mobile management net element.

In order to provide circuit switching to user equipment (UE) in E-UTRAN networks（Circuit Switched, CS) business, introduce a kind of framework by E-UTRAN network connections to CS.As shown in Fig. 2 MME is connected by SGs interfaces with CS moving exchanging center MSC, realizes and provide CS business to UE in E-UTRAN networks.Under this architecture, UE initiates EMM combined process flows (EMM Combined procedures) first in E-UTRAN networks, for example, united attachment flow (Combined Attach Procedure) or united tracking area/location area updating flow (Combined TA/LA Updating Procedure).By combined process flow, MME is that UE establishments SGs is associated with MSC.However, in the business of execution, UE needs to fall back to GERAN/UTRAN from E-UTRAN, that is, need execution circuit to exchange and fall CS fallback after rise.

Inventor has found that prior art at least has problems with：

When UE is sent to network side activates business request to ask execution circuit to exchange falling CS fallback business, if network side MME have rejected UE request of activating business, UE then needs active gravity treatment to return GERAN/ UTRAN, this process needs to consume longer time, the speech business experience of influence user.When particularly active user performs temporal sensitivity higher business, for example, emergence call service, high time delay will cause poor business experience.The content of the invention

The embodiments of the invention provide a kind of processing method of circuit switching fall-back, device and system, when network side refuses the CSFB requests of user equipment, UE gravity treatment can return GERAN/UTRAN under the assistance of network, realize circuit switching fall-back.

One aspect of the present invention provides a kind of processing method of circuit switching fall-back, including：

The business request information for the extension that user equipment is sent is received, the business request information of the extension refers to Show circuit switching fall-back business；

When it is determined that needing to refuse the business request information of the extension, trigger Evolved UTRAN E-UTRAN and provide reselection information to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access web UTR AN according to the reselection information from the E-UTRAN.

The processing method for the circuit switching fall-back that another aspect of the invention is provided, including：

When it is determined that needing execution circuit to exchange falling business, the business request information of extension is sent to mobile management entity, the business request information indicating circuit of the extension exchanges falling business；

Obtain the reselection information that Evolved UTRAN E-UTRAN is provided, global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN is fallen back to from the E-UTRAN according to the reselection information, wherein, when the reselection information is that the mobile management entity determines to need to refuse the business request information of the extension, trigger what the E-UTRAN was provided.

The circuit switching fall-back triggering instruction that mobility management entity is sent is received, wherein, the circuit switching fall-back triggering indicate to be sent when the mobility management entity determines and needs the circuit switching fall-back for refusing user equipment to ask；

Triggered and indicated according to the circuit switching fall-back, reselection information is provided to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN according to the reselection information from Evolved UTRAN E-UTRAN.

A kind of processing unit for circuit switching fall-back that another aspect of the invention is provided, including：

Receiving unit, the business request information of the extension for receiving user equipment transmission, the business request information indicating circuit of the extension exchanges falling business；

Determining unit, is used to determine whether the business request information for needing to refuse the extension that the receiving unit is received；

Trigger element, for when the determining unit determines to need to refuse the business request information for the extension that the receiving unit is received, trigger evolved General Mobile universal land radio access web E-UTRAN to The user equipment provides reselection information, in order to the user equipment according to the reselection information from described

E-UTRAN falls back to global mobile communication wireless access network GERAN/ universal land radio access webs UTRANo

A kind of user equipment for circuit switching fall-back that another aspect of the invention is provided, including：

Service request unit, for when it is determined that needing execution circuit to exchange falling business, the business request information of extension to be sent to mobile management entity, the business request information indicating circuit of the extension exchanges falling business；

Obtaining unit, reselection information for obtaining Evolved UTRAN E-UTRAN offers, wherein, when the reselection information is that the mobile management entity determines to need to refuse the business request information of the extension, trigger what the E-UTRAN was provided；

First falls unit after rise, and global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN is fallen back to from the E-UTRAN according to the reselection information.

Receiving unit, circuit switching fall-back for receiving mobility management entity transmission triggers instruction, wherein, the circuit switching fall-back triggering indicates it is that the mobility management entity is sent when it is determined that needing the circuit switching fall-back request for refusing user equipment；

Unit is provided, indicated for being triggered according to the circuit switching fall-back, reselection information is provided to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN according to the reselection information from the E-UTRAN.

A kind of processing system for circuit switching fall-back that another aspect of the invention is provided, including user equipment, mobile management entity and Evolved UTRAN E-UTRAN：

The user equipment, for when it is determined that needing execution circuit to exchange falling business, send the business request information of extension, the business request information indicating circuit of the extension exchanges falling business, the reselection information that the E-UTRAN is provided is obtained, global mobile communication wireless access network GERAN/ universal land radio access web UTR AN are fallen back to from the E-UTRAN according to the reselection information；

The mobile management entity, the business request information for receiving the extension that the user equipment is sent, Determine the need for refusing the business request information for the extension that the receiving unit is received, when it is determined that needing to refuse the business request information for the extension that the receiving unit is received, trigger the E-UTRAN and provide reselection information to the user equipment；

The E-UTRAN provides reselection information according to the triggering of the mobile management entity to the user equipment.

The present invention proposes a kind of CSFB processing method, device and system, when network side refuses the CSFB requests of user equipment, E-UTRAN can be triggered and provide reselection information to user equipment, in order to which user equipment falls back to GERAN/UTRAN according to reselection information from the E-UTRAN, when being rejected compared to prior art, user equipment needs actively to interact to obtain reselection information with wireless network, it can ensure that UE quickly falls back to GERAN/UTRAN and performs CS business, CSFB time delay is reduced, the business experience of user is maintained.Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, cylinder will be made to the required accompanying drawing used in embodiment or description of the prior art below singly to introduce, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is current radio gradual network structure figure；

Fig. 2 is the current Organization Chart by E-UTRAN network connections to CS；

Fig. 3 is the schematic flow sheet of the method for the embodiment of the present invention one；

Fig. 4 is the schematic flow sheet of the method for the embodiment of the present invention two；

Fig. 5 is the schematic flow sheet of the method for the embodiment of the present invention three；

Fig. 6 is the schematic flow sheet of the method for the embodiment of the present invention four；

Fig. 7 is a kind of structural representation of device provided in an embodiment of the present invention；

Fig. 8 is a kind of structural representation of user equipment provided in an embodiment of the present invention；

Fig. 9 is the structural representation of another device provided in an embodiment of the present invention； Figure 10 is a kind of structural representation of system provided in an embodiment of the present invention.Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the 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 under the premise of creative work is not paid belongs to the scope of protection of the invention.

Based on CSFB mechanism, no matter caller or called service, UE returns GERAN/UTRAN according to MME instruction active gravity treatment, for caller（MO, Mobile Originating) flow includes：First, UE sends request EXTENDED SERVICE REQUEST message of activating business to MME, secondly, MME indicates that UE is switched to GERAN/UTRAN (specifically by E-UTRAN, MME returns to service denial Service Reject message to UE, UE is received after the service denial message, actively initiate the process of selection target network cell, GERAN/UTRAN is returned according to the target cell information gravity treatment obtained with network interaction process), UE finally falls GERAN/UTRAN after rise and performs caller.For called flow, i.e. MSC receives an end and exhaled（MT, Mobile Terminated ):First, MSC sends beep-page message by SGs interfaces to MME；Secondly, MME carries out CS pagings by E-UTRAN networks to UE；Then, UE is received after the CS beep-page messages, and called service is performed by returning to GERAN/UTRAN from E-UTRAN similar to calling procedure mode.The embodiment of the present invention one provides a kind of CSFB processing method, and as shown in Figure 3, this method includes： S301 :The business request information for the extension that user equipment is sent is received, the business request information indicating circuit of the extension, which is exchanged, to be fallen after rise（CS fallback, CSFB) business；

S302:When it is determined that needing to refuse the business request information of the extension, trigger Evolved UTRAN E-UTRAN and provide reselection information to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network according to the reselection information from the E-UTRAN

GERAN/ universal land radio access webs UTRAN. When the MME of network side determines to need to refuse the CSFB service requests of user equipment, network side triggering

E-UTRAN actively starts the flow for assisting user equipment to return to GERAN/UTRAN, it this method solve in the prior art because GERAN/UTRAN execution CS business is returned in user equipment active gravity treatment and causes service delay long, the problem of customer service experience is impacted, it can ensure that user equipment quickly carries out CSFB and falls business after rise, ensure that user equipment returns to the time delay that GERAN/UTRAN performs CS business, maintained the business experience of user.

Further, the embodiment of the present invention one can also be when it is determined that need to refuse the business request information of the extension, refuse information is sent to the user equipment, the refuse information indicates that the user equipment starts and waits network-assisted its to fall back to the GERAN/UTRAN from the E-UTRAN;This method may further ensure that user equipment does not start the flow for actively returning to GERAN/UTRAN immediately after refuse information is received, but start the program for waiting network-assisted its return GERAN/UTRAN, ensure the orderly execution of scheme.The embodiment of the present invention two provides a kind of CSFB processing method, and as shown in Figure 3, this method includes：

S401 :When it is determined that needing execution circuit to exchange falling（CS fallback, CSFB) business when, the business request information of extension is sent to mobile management entity MME, the business request information indicating circuit of the extension, which is exchanged, to be fallen after rise（CS fallback, CSFB) business；

S402:Obtain the reselection information that Evolved UTRAN E-UTRAN is provided, global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN is fallen back to from the E-UTRAN according to the reselection information, wherein, when the reselection information is that the mobile management entity determines to need to refuse the business request information of the extension, trigger what the E-UTRAN was provided.

Specifically, in this step, the E-UTRAN is received in RRC Connection Releases and the reselection information that will be returned in flow of the user equipment from E-UTRAN Network Mobility to GERAN/UTRAN, the reselection information includes user equipment and falls back to objective network cell information required for GERAN/UTRAN.

The embodiment of the present invention can specifically be performed by user equipment (UE), the embodiment of the present invention according to reselection information returns to GERAN/UTRAN after the reselection information of network side return is received, and this method solve and returns GERAN/UTRAN due to user equipment active gravity treatment in the prior art and perform CS business and when causing business Extension, the problem of customer service experience is impacted can ensure that user equipment quickly carries out CSFB and falls business after rise, ensure that user equipment returns to the time delay that GERAN/UTRAN performs CS business, maintain the business experience of user.

Further, the user equipment can also receive refuse information, according to the refuse information, start and wait network-assisted its to fall back to the flow of the GERAN/UTRAN from the E-UTRAN, wherein, the refuse information is that the mobile management entity determines to need to refuse to send during the business request information of the extension.After user equipment receives the refuse information for the CSFB business that network side is initiated user equipment, the user equipment does not start the flow for actively returning to GERAN/UTRAN immediately, but starts wait program, has ensured the orderly execution of scheme.The embodiment of the present invention three provides a kind of CSFB processing method, and as shown in Figure 3, this method includes： S501 :The circuit switching fall-back triggering instruction that mobility management entity is sent is received, wherein, the circuit switching fall-back triggering indicate to be sent when the mobility management entity determines and needs the circuit switching fall-back for refusing user equipment to ask；

S502:Triggered and indicated according to the circuit switching fall-back, reselection information is provided to the user equipment, in order to the user equipment according to the reselection information from Evolved UTRAN

E-UTRAN falls back to global mobile communication wireless access network GER AN/ universal land radio access webs

UTRANo

The embodiment of the present invention can specifically be performed by Evolved UTRAN E-UTRAN, the embodiment of the present invention is when network side determines to need to refuse the CSFB service requests of user equipment, E-UTRAN can be triggered and actively start the flow for assisting user equipment to return to GERAN/UTRAN, it this method solve in the prior art because GERAN/UTRAN execution CS business is returned in user equipment active gravity treatment and causes service delay long, the problem of customer service experience is impacted, it can ensure that user equipment quickly carries out CSFB and falls business after rise, ensure that user equipment returns to the time delay that GERAN/UTRAN performs CS business, maintain the business experience of user.

As shown in fig. 6, Fig. 6 is a kind of processing method for CSFB business that the embodiment of the present invention four is provided, including： S601 :User equipment（UE the packet network of evolution) is completed（Evolved packet system, EPS) the united attachment flow of the another ll codes (International Mobile Subscriberldentification Number, IMSI) of/international mobile subscriber, mobile management network element（) and mobile switching centre MME（MSC the association of SGs interfaces) is created for UE；

S602:When having caller or called service, the UE determines that perform CSFB falls back to GERAN/UTRAN from E-UTRAN;

S603：The UE sends the service request of extension to the MME（Extended Service Request) message, specifically, carrying type of service in the business request information of the extension（Service type) cell, the type of service cell is set to caller " mobile originating CS fallback ", calling service for indicating CSFB, or the cell are set to the called service that " mobile terminating CS fallback " is used to indicate CSFB；

S604:The MME determines the business request information for needing to refuse the extension, service denial (Service Reject) message is then sent to the UE, wherein, the refuse information indicates that the user equipment starts network-assisted its of wait and falls back to the GERAN/UTRAN from the E-UTRAN;Specifically, cause value can be carried in the service denial message（Cause), the cause value is used to indicating that UE starts waiting network-assisted its to return to GERAN/UTRAN program, and specifically, the UE waits wireless heterogeneous networks（Radio Resource Control, RRC) Connection Release (RRC Release) message；Correspondingly, the UE receives the service denial message of above-mentioned carrying cause value, according to the service denial message, the UE starts wait program, the wait program refers to the UE, and GERAN/UTRAN is not returned in active gravity treatment immediately, and be to wait for network-assisted its and return to GERAN/UTRAN, specifically, the RRC Release message of network side transmission can be to wait for.Further, the UE can start waiting timer, within the waiting timer duration, and the UE waits RRC Connection Releases, if the timer expiry, and GERAN/UTRAN is returned in the UE actives gravity treatment;

It should be noted that in this step, MME determines that the situation for needing to refuse the service request of the extension includes being not limited to：The MME determines UE currently only one local IP accesses (Local IP Access, LIPA) packet data network（Packet Data Network, PDN) connection and UE have left LIPA PDN Authorized region, or the MME determines that the UE is unknowable etc. because of the context without the preservation UE.Wherein, LIPA is referred to, when user is from HeNB (Home eNode B, family eNB, entity network element in E-UTRAN can be with HeNB) access when, UE can directly access other IP devices in family or enterprise network, the user plane without passing through mobile operator networks by HeNB；LIPA has region limitation, can only realize that LIPA, UE leave HeNB in LIPA authorized regions, be considered as UE and leave LIPA authorized regions.If the network equipment (for example, MME) finds that UE leaves LIPA authorized regions, then the network equipment will discharge（Similar saying can be deleted, and deactivate）LIPA PDN connections.If current UE only has a LIPA PDN connection, then network will separate the UE.

S605：The MME sends UE context release requests to E-UTR AN（UE Context Release Command) message, indicated wherein the UE context release requests carry circuit switching fall-back triggering CS Fallback Triggered, for example can be by carrying cause value（Cause) indicate that release is due to what CSFB was triggered, Cause is set to " CS Fallback Triggered "；

S606:CS Fallback Triggered in the UE context release request messages are indicated, reselection information is provided to the user equipment；

Specifically, the E-UTRAN is indicated according to the CS Fallback Triggered, RRC connection release request message is sent to the UE, and by UE from E-UTRAN Network Mobilities to GERAN/UTRAN networks, more specifically, E-UTRAN triggering RRC Connection Releases are simultaneously redirected to GERAN or UTRAN networks (RRC connection release with redirection to GERAN or UTRAN) flow, and RRC releasing requests message is sent and by reselection information to UE in the flow（Redirection information) carry notified in the RRC releasing requests message to the UE, wherein, the reselection information falls back to the objective network cell information required for GERAN/UTRAN including the UE, the objective network cell information can include one or more Physical Cell Identifier information (physical cell identities) and the corresponding system information of cell (System Information), and described reselection information can be pre-configured in the network side（Mainly evolution base station eNodeB), or the UE performs what is reported during united attachment program.

Further, it is necessary to which explanation, is performing the RRC Connection Releases and be redirected to GERAN Before or UTRAN flow through a networks, the E-UTRAN can also judge whether the UE and network all support RRC Connection Releases and provide multiple cell to be redirected to GERAN or UTRAN (RRC connection release with redirection and Multi Cell System Information to GERAN/UTRAN), if both supported, start the flow.

In certain above-mentioned steps, the reselection information can also be carried by other message, such as described E-UTRAN constructs new reselection information and provides message, carry reselection information in the reselection information provides message, and send it to user equipment.

S607:The E-UTRAN confirms Connection Release, specifically, and the E-UTRAN returns to the release of UE contexts to the MME and completed（UE Context Release Complete) message；

S608:The UE receives the RRC connection release requests message, and GERAN/UTRAN is returned according to the reselection information gravity treatment;Specifically, as described in step S406, the objective network cell information that the UE is provided according to network accesses the GERAN/UTRAN, sets up wireless signaling connection, returns to GERAN/UTRAN networks, realize quick CS Fallback.So far, method provided in an embodiment of the present invention, when network side determines to need to refuse the CSFB service requests of user equipment, network side assists UE to obtain reselection information, return to GERAN/UTRAN, compared to UE actively interacted with wireless network obtain reselection information again gravity treatment return GERAN/UTRAN will more save the time, it is resident because searching for suitable cell in GERAN/UTRAN wireless environment due to active gravity treatment needs, during search, exist in current environment it is multiple can persistent district, then UE may need to attempt one by one and select most suitable（Signal intensity is optimal）Cell is resident, and this will be very time-consuming, therefore this programme UE that more can efficiently cooperate returns to GERAN/UTRAN, reduces the time delay that returns to.Ask, step S608 can also be performed before S607 or concurrently, have no effect on the realization of the embodiment of the present invention.

After aforesaid operations have been performed, the UE accesses objective network cell, whether the cell of GSM/EDGE network of the cell that the UE further compares the GSM/EDGE networks being currently accessed with itself preserving is inconsistent, that is, compares the Location Area Identification of received present access subzone（ location area Identification, LAI) the LAI preserved with the UE, if consistent, the UE starts to initiate the related flow of CS business, for example, service request Service Request message is sent to MSC, if inconsistent, the UE also needs to execution position area more new technological process, and the embodiment of the present invention additionally provides the scheme more optimized that UE carries out location area updating herein, further to realize that the quick of UE returns to GERAN/UTRAN, this further scheme includes：

When the UE find position area it is inconsistent, and the UE find current network be operated under network mode I (Network Modes of Operation-I) scene（Network mode I is scene as defined in 3GPP standards, when there is Gs interface in the Serving GPRS Support Node SGSN in GERAN/UTRAN networks and CS domains MSC, as network mode I), then the UE initiates single location area updating (Location Area Update LAU) flow.Existing normal process is under network mode I, it is necessary to perform united position update flow, i.e., perform LAU flows and Routing Area Update simultaneously（Routing Area Update, RAU) flow, but the united RAU/LAU Updating flows it is blunt be likely due to can not from MME obtain UE context and lead to the failure（Refuse the scene of service request based on the MME described in step S404, the MME has probably deleted preserved UE contexts and has been unable to successful execution RAU flows), and then influence whether whether UE can return to GERAN/UTRAN more quickly, further scheme provided in an embodiment of the present invention, UE, which initiates single LAU flows, can evade such influence, CSFB flows can be accelerated so that UE can quickly perform CS business.

In addition, in step s 604, the UE is after service denial message is received, waiting timer can be started, if the timer expiry, then the UE can active gravity treatment return GERAN/UTRAN, mode of operation is switched to GERAN/UTRAN by i.e. described UE from E-UTRAN, then suitable cell is searched in GERAN/UTRAN wireless environment to be resident, this method supplements implementation for a kind of of the embodiment of the present invention, the problem of user equipment caused by network breaks down can not get the reselection information of network side active transmission and successfully can not return to GERAN/UTRAN can be made up.

As shown in fig. 7, Fig. 7 is a kind of processing unit for CSFB business that the embodiment of the present invention five is provided, including： Receiving unit 701, the business request information of the extension for receiving user equipment transmission, the business request information indicating circuit of the extension exchanges falling business；

Determining unit 702, is used to determine whether the business request information for needing to refuse the extension that the receiving unit 701 is received；

Trigger element 703, for when the determining unit 702 determines to need to refuse the business request information for the extension that the receiving unit 701 is received, trigger evolved General Mobile universal land radio access web E-UTRAN and provide reselection information to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN according to the reselection information from the E-UTRAN.

Specifically, the trigger element 703 specifically for：When the determining unit 702 determines to need to refuse the business request information for the extension that the receiving unit 701 is received, customer equipment context releasing request message is sent to the E-UTRAN, the customer equipment context releasing request message carries the circuit switching fall-back triggering and indicated, indicated with causing the circuit switching fall-backs of the E-UTRAN in the customer equipment context releasing request message to trigger, radio resource control RRC connection release request message is sent to the user equipment, the RRC connection release requests message carries the reselection information.

Further, in the embodiment that the embodiment of the present invention one more optimizes, the processing unit can also include：Refuse unit 704, for when the determining unit 702 determines to need to refuse the business request information for the extension that the receiving unit 701 is received, refuse information is sent to the user equipment, the refuse information indicates that the user equipment waits network-assisted its to fall back to the GERAN/UTRAN from the E-UTRAN

The processing unit of the embodiment of the present invention can be specifically mobility management entity MME, the embodiment of the present invention is when network side determines to need to refuse the CSFB service requests of user equipment, the processing unit can trigger E-UTRAN and actively start the flow for assisting user equipment to return to GERAN/UTRAN, solve in the prior art because GERAN/UTRAN execution CS business is returned in user equipment active gravity treatment and causes service delay long, the problem of customer service experience is impacted, it can ensure that user equipment quickly carries out CSFB and falls business after rise, ensure that user equipment returns to the time delay that GERAN/UTRAN performs CS business, maintain the business of user Experience.

As shown in figure 8, Fig. 8 is a kind of user equipment for CSFB business that the embodiment of the present invention six is provided, including：

Service request unit 801, for when it is determined that needing execution circuit to exchange falling business, the business request information of extension to be sent to mobile management entity, the business request information indicating circuit of the extension exchanges falling business；

Obtaining unit 802, reselection information for obtaining Evolved UTRAN E-UTRAN offers, wherein, when the reselection information is that the mobile management entity determines to need to refuse the business request information of the extension, trigger what the E-UTRAN was provided；

Specifically, the obtaining unit 802 carries the reselection information specifically for receiving the radio resource control RRC connection release request message that the E-UTRAN is sent, the RRC connection release requests message；First falls unit 803 after rise, and global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN is fallen back to from the E-UTRAN according to the reselection information.

Further, in the embodiment that the embodiment of the present invention one more optimizes, the processing unit can also include：Wait unit 804, for receiving refuse information, according to the refuse information, start and wait network-assisted its to fall back to the program of the GERAN/UTRAN from the E-UTRAN, wherein, the refuse information is that the mobile management entity determines to need to refuse to send during the business request information of the extension.

Further, in the embodiment that the embodiment of the present invention one more optimizes, the processing unit can also include：Updating block 805, when the GERAN/UTRAN preserved for the location area LAI in the GERAN/UTRAN being currently accessed and the user equipment location area LAI is inconsistent and current network is operated in network mode I, the single location area updating LAU flows of initiation.

Further, in the embodiment that the embodiment of the present invention one more optimizes, the processing unit can also include：Second falls unit 806 after rise, for after the wait unit time-out, the GERAN/UTRAN to be returned in active gravity treatment

The user equipment of the embodiment of the present invention, returns to GERAN/UTRAN according to reselection information after the reselection information of network side return is received, this method solve in the prior art due to user equipment active gravity treatment GERAN/UTRAN is returned to perform CS business and cause service delay long, the problem of customer service experience is impacted, it can ensure that user equipment quickly carries out CSFB and falls business after rise, ensure that user equipment returns to the time delay that GERAN/UTRAN performs CS business, maintained the business experience of user.

As shown in figure 9, Fig. 9 is a kind of processing unit for CSFB business that the embodiment of the present invention seven is provided, including：

Receiving unit 901, circuit switching fall-back for receiving mobility management entity transmission triggers instruction, wherein, the circuit switching fall-back triggering indicates it is that the mobility management entity is sent when it is determined that needing the circuit switching fall-back request for refusing user equipment；

Unit 902 is provided, indicated for being triggered according to the circuit switching fall-back, reselection information is provided to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN according to the reselection information from the E-UTRAN;

Specifically, the receiving unit 901 carries circuit switching fall-back triggering and indicated specifically for receiving the customer equipment context releasing request message that the mobility management entity is sent, the customer equipment context releasing request message；

Correspondingly, the unit 902 that provides triggers instruction specifically for the circuit switching fall-back in the customer equipment context releasing request message, radio resource control RRC connection release request message is sent to the user equipment, the RRC connection release requests message carries the reselection information.

The embodiment of the present invention is specially Evolved UTRAN E-UTRAN, the embodiment of the present invention is when network side determines to need to refuse the CSFB service requests of user equipment, E-UTRAN can be triggered and actively start the flow for assisting user equipment to return to GERAN/UTRAN, it this method solve the problem of prior art user business experience is impacted, it can ensure that user equipment quickly carries out CSFB and falls business after rise, ensure that user equipment returns to the time delay that GERAN/UTRAN performs CS business, maintained the business experience of user.

As shown in Figure 10, the system for a kind of CSFB business that Figure 10 provides for the embodiment of the present invention eight, including user equipment 1001, mobile management entity 1002 and Evolved UTRAN E-UTRAN 1003:

The user equipment 1001, for when it is determined that needing execution circuit to exchange falling business, send the business request information of extension, the business request information indicating circuit of the extension exchanges falling business, the reselection information that the E-UTRAN is provided is obtained, global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN is fallen back to from the E-UTRAN according to the reselection information;

The mobile management entity 1002, business request information for receiving the extension that the user equipment is sent, determine the need for refusing the business request information for the extension that the receiving unit is received, when it is determined that needing to refuse the business request information for the extension that the receiving unit is received, trigger the E-UTRAN1003 and provide reselection information to the user equipment；

The E-UTRAN1003 provides reselection information according to the triggering of the mobile management entity to the user equipment.

The embodiment of the present invention is when network side determines to need to refuse the CSFB service requests of user equipment, E-UTRAN can be triggered and actively start the flow for assisting user equipment to return to GERAN/UTRAN, it this method solve in the prior art because GERAN/UTRAN execution CS business is returned in user equipment active gravity treatment and causes service delay long, the problem of customer service experience is impacted, it can ensure that user equipment quickly carries out CSFB and falls business after rise, ensure that user equipment returns to the time delay that GERAN/UTRAN performs CS business, maintained the business experience of user.

One of ordinary skill in the art will appreciate that：Accompanying drawing is necessary to module or flow in the schematic diagram of one embodiment, accompanying drawing not necessarily implements the present invention.

One of ordinary skill in the art will appreciate that：The module in user equipment in embodiment can be distributed in the user equipment of embodiment according to embodiment description, can also be carried out respective change and be disposed other than in one or more user equipmenies of the present embodiment.The module of above-described embodiment can be merged into a module, can also be further split into multiple submodule.

One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can be completed by the related hardware of programmed instruction, foregoing program can be stored in a computer read/write memory medium, the program upon execution, performs the step of including above method embodiment；And it is foregoing Storage medium include：ROM, RAM, magnetic disc or CD etc. are various finally should be noted that with Jie of store program codes：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in previous embodiment, or carry out equivalent substitution to which part technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the spirit and scope of technical scheme of the embodiment of the present invention.

Claims

Claims

1st, a kind of processing method of circuit switching fall-back, it is characterised in that including：

The business request information for the extension that user equipment is sent is received, the business request information indicating circuit of the extension exchanges falling business；

When it is determined that needing to refuse the business request information of the extension, trigger Evolved UTRAN E-UTRAN and provide reselection information to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access web UTR AN according to the reselection information from the E-UTRAN.

2nd, the method as described in claim 1, it is characterised in that when it is determined that needing to refuse the business request information of the extension, methods described also includes：

Refuse information is sent to the user equipment, the refuse information indicates that the user equipment waits network-assisted its to fall back to the GERAN/UTRAN from the E-UTRAN.

3rd, method as claimed in claim 1 or 2, it is characterised in that the triggering Evolved UTRAN E-UTRAN provides reselection information to the user equipment to be included：

Exchanged to the E-UTRAN transtation mission circuits and fall triggering instruction after rise；

The E-UTRAN is triggered according to the circuit switching fall-back and indicated, reselection information is sent to the user equipment, and the reselection information includes the objective network cell information required for the user equipment falls back to the GERAN/UTRAN from the E-UTRAN.

4th, method as claimed in claim 3, it is characterised in that described to include to E-UTRAN transtation mission circuits exchange falling triggering instruction：

Customer equipment context releasing request message is sent to the E-UTRAN, the customer equipment context releasing request message carries the circuit switching fall-back triggering and indicated；

Correspondingly, the E-UTRAN is triggered according to the circuit switching fall-back and indicated, sending reselection information to the user equipment includes：

Circuit switching fall-back triggerings of the E-UTRAN in the customer equipment context releasing request message is indicated, radio resource control RRC connection release request message is sent to the user equipment, The RRC connection release requests message carries the reselection information.

5th, method as claimed in claim 1 or 2, it is characterised in that the user equipment falls back to the GERAN/UTRAN according to the reselection information from the E-UTRAN to be included：

According to the reselection information, GERAN/UTRAN is accessed, wireless signaling is set up with GERAN/UTRAN and is connected.

6th, the method as described in claim 1 or 2 or 5, it is characterised in that the user equipment is fallen back to from the E-UTRAN after the GERAN/UTRAN, and methods described also includes：

If the location area LAI for the GERAN/UTRAN that the location area LAI for the GERAN/UTRAN being currently accessed is preserved with the user equipment is inconsistent and current network is operated in network mode I, the single location area updating LAU flows that the user equipment is initiated are received.

7th, method as claimed in claim 2, it is characterised in that the user equipment start wait it is network-assisted its after the E-UTRAN falls back to the GERAN/UTRAN, methods described also includes：The user equipment is received after the refuse information, starts waiting timer, if the timer expiry, and the reselection information is not received also, and the GERAN/UTRAN is returned in the user equipment active gravity treatment

8th, a kind of processing method of circuit switching fall-back, it is characterised in that including：

When it is determined that needing execution circuit to exchange falling business, the business request information of extension is sent to mobile management entity, the business request information indicating circuit of the extension exchanges falling business；

Obtain the reselection information that Evolved UTRAN E-UTRAN is provided, global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN is fallen back to from the E-UTRAN according to the reselection information, wherein, when the reselection information is that the mobile management entity determines to need to refuse the business request information of the extension, trigger what the E-UTRAN was provided.

9th, method as claimed in claim 8, it is characterised in that also include：

Receive refuse information, according to the refuse information, start waiting timer, network-assisted its is waited to fall back to the GERAN/UTRAN from the E-UTRAN, wherein, the refuse information is that the mobile management entity determines to need to refuse to send during the business request information of the extension. 10th, method as claimed in claim 8 or 9, it is characterised in that the reselection information that the acquisition Evolved UTRAN E-UTRAN is provided includes：

The radio resource control RRC connection release request message that the E-UTRAN is sent is received, the RRC connection release requests message carries the reselection information.

11st, method as claimed in claim 8 or 9, it is characterised in that described GSM/EDGE is fallen back to from the E-UTRAN according to the reselection information to include：

It is just blunt according to the reselection information, GERAN/UTRAN is accessed, wireless signaling is set up with the GERAN/UTRAN and is connected.

12nd, method as claimed in claim 8 or 9, it is characterised in that methods described also includes：If the location area LAI for the GERAN/UTRAN that the location area LAI for the GERAN/UTRAN being currently accessed is preserved with the user equipment is inconsistent and current network is operated in network mode I, the single location area updating LAU flows initiated.

13rd, method as claimed in claim 9, it is characterised in that methods described also includes：If the waiting timer time-out, the reselection information is not received also, the GERAN/UTRAN is returned in active gravity treatment

14th, a kind of processing method of circuit switching fall-back, it is characterised in that including：

The circuit switching fall-back triggering instruction that mobility management entity is sent is received, wherein, the circuit switching fall-back triggering indicate to be sent when the mobility management entity determines and needs the circuit switching fall-back for refusing user equipment to ask；

Triggered and indicated according to the circuit switching fall-back, reselection information is provided to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN according to the reselection information from Evolved UTRAN E-UTRAN.

15th, method as claimed in claim 14, it is characterised in that the circuit switching fall-back triggering instruction that the reception mobility management entity is sent includes：

The customer equipment context releasing request message that the mobility management entity is sent is received, the customer equipment context releasing request message carries circuit switching fall-back triggering and indicated； Correspondingly, triggered and indicated according to the circuit switching fall-back, providing reselection information to the user equipment includes：

Circuit switching fall-back triggering in the customer equipment context releasing request message is indicated, radio resource control RRC connection release request message is sent to the user equipment, and the RRC connection release requests message carries the reselection information.

16th, a kind of processing unit of circuit switching fall-back, it is characterised in that including：

Receiving unit, the business request information of the extension for receiving user equipment transmission, the business request information indicating circuit of the extension exchanges falling business；

Determining unit, is used to determine whether the business request information for needing to refuse the extension that the receiving unit is received；

Trigger element, for when the determining unit determines to need to refuse the business request information for the extension that the receiving unit is received, trigger evolved General Mobile universal land radio access web E-UTRAN and provide reselection information to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GER AN/ universal land radio access webs UTRANo according to the reselection information from the E-UTRAN

17th, device as claimed in claim 16, it is characterised in that also include：

Refuse unit, for when the determining unit determines to need to refuse the business request information for the extension that the receiving unit is received, refuse information is sent to the user equipment, the refuse information indicates that the user equipment waits network-assisted its to fall back to the GERAN/UTRAN from the E-UTRAN.

18th, the device as described in claim 16 or 17, it is characterised in that the trigger element specifically for：

When the determining unit determines to need to refuse the business request information for the extension that the receiving unit is received, customer equipment context releasing request message is sent to the E-UTRAN, the customer equipment context releasing request message carries the circuit switching fall-back triggering and indicated, indicated with causing the circuit switching fall-backs of the E-UTRAN in the customer equipment context releasing request message to trigger, radio resource control RRC connection release request message is sent to the user equipment, the RRC Connection Releases please Message is asked to carry the reselection information.

19th, a kind of user equipment of circuit switching fall-back, it is characterised in that including：

Service request unit, for when it is determined that needing execution circuit to exchange falling business, the business request information of extension to be sent to mobile management entity, the business request information indicating circuit of the extension exchanges falling business；

Obtaining unit, reselection information for obtaining Evolved UTRAN E-UTRAN offers, wherein, when the reselection information is that the mobile management entity determines to need to refuse the business request information of the extension, trigger what the E-UTRAN was provided；

First falls unit after rise, and global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN is fallen back to from the E-UTRAN according to the reselection information.

20th, user equipment as claimed in claim 19, it is characterised in that also include：

Wait unit, for receiving refuse information, according to the refuse information, start waiting timer, network-assisted its is waited to fall back to the GERAN/UTRAN from the E-UTRAN, wherein, the refuse information is that the mobile management entity determines to need to refuse to send during the business request information of the extension.

21st, the user equipment as described in claim 19 or 20, it is characterized in that, the obtaining unit carries the reselection information specifically for receiving the radio resource control RRC connection release request message that the E-UTRAN is sent, the RRC connection release requests message.

22nd, the user equipment as described in claim 19 or 20, it is characterised in that also include：Updating block, when the GERAN/UTRAN preserved for the location area LAI in the GERAN/UTRAN being currently accessed and the user equipment location area LAI is inconsistent and current network is operated in network mode I, the single location area updating LAU flows of initiation.

23rd, user equipment as claimed in claim 20, it is characterised in that also include：

Second falls unit after rise, and when for the waiting timer time-out in the wait unit and also not receiving the reselection information, the GERAN/UTRAN is returned in active gravity treatment.

24th, a kind of processing unit of circuit switching fall-back, it is characterised in that including： Receiving unit, circuit switching fall-back for receiving mobility management entity transmission triggers instruction, wherein, the circuit switching fall-back triggering indicates it is that the mobility management entity is sent when it is determined that needing the circuit switching fall-back request for refusing user equipment；

Unit is provided, indicated for being triggered according to the circuit switching fall-back, reselection information is provided to the user equipment, in order to which the user equipment falls back to global mobile communication wireless access network GERAN/ universal land radio access webs UTRAN according to the reselection information from the E-UTRAN.

25th, device as claimed in claim 24, it is characterized in that, the receiving unit carries circuit switching fall-back triggering and indicated specifically for receiving the customer equipment context releasing request message that the mobility management entity is sent, the customer equipment context releasing request message；

Correspondingly, the unit that provides triggers instruction specifically for the circuit switching fall-back in the customer equipment context releasing request message, radio resource control RRC connection release request message is sent to the user equipment, the RRC connection release requests message carries the reselection information.