Summary of the invention
One to be solved of the embodiment of the present invention technical problem is that: provides a kind of circuit domain fallback method and communication equipment, communication system, with when to avoid the MSC newly searched different from MSC when combining attachment, user terminal last longer technical problem to what the MSC newly searched initiated CS speech business.
For solving above-mentioned technical problem, an aspect according to embodiments of the present invention, it is provided that a kind of circuit domain fallback method, including:
When in Long Term Evolution LTE network, user terminal has speech business demand, evolution base station eNodeB indicates described user terminal to carry out the measurement of different system cell, and receive the cell measurement reporting reported after described user terminal carries out the measurement of different system cell, this cell measurement reporting includes the Location Area Identification LAI in described user terminal present position district, wherein, LAI uniquely identifies the community in a circuit-domain network；
ENodeB sends business request information to Mobility Management Entity MME, and described business request information includes described LAI；
Moving exchanging center MSC information corresponding for LAI described in the MME contingency table that pre-builds of inquiry, and comparison query to MSC whether identical with MSC when combining attachment associating user terminal described in MSC information；
If the MSC inquired is different from MSC when combining attachment, MME is according to the MSC information inquired, with the co-location more new technological process that the MSC service system inquired initiates tracking area and lane place, described MSC service system includes the VLR Visitor Location Register VLR of MSC and the correspondence thereof inquired；
The co-location of tracking area and lane place is after more new technological process completes, and MSC service system obtains the user contracting data of described user terminal and position area information and stores, and MME indicates eNodeB that described user terminal is carried out circuit domain dropping；
ENodeB instructs the MSC inquired described in the falling extremely of described user terminal；
The MSC inquired described in the access of described user terminal carries out speech business.
In the circuit domain fallback method of another embodiment of the present invention, also include:
Setting up described contingency table in advance in MME, described contingency table includes LTE network and the corresponding relation list of each MSC and homing position district LAI thereof in circuit-domain network superimposed coverage area.
In the circuit domain fallback method of another embodiment of the present invention, the co-location of tracking area and lane place after more new technological process completes, also includes:
MME reports the latest position information of described user terminal to home subscriber server HSS, described latest position information include described in LAI information in the MSC that inquires and described business request information.
In the circuit domain fallback method of another embodiment of the present invention, institute's voice traffic includes the circuit domain business beyond short message service.
In the circuit domain fallback method of another embodiment of the present invention, in described LTE network, user terminal has speech business demand to include: in described LTE network, user terminal initiates voice service request to described eNodeB；
Described eNodeB instruct described user terminal fall after rise to described in the MSC that inquires include: eNodeB indicate described user terminal be redirected back to by radio resource control RRC drop down onto described in the MSC that inquires；
Described user terminal access described in the MSC that inquires carry out speech business and include: described user terminal access described in the MSC that inquires send voice service request to this MSC inquired；The described MSC inquired is that described user terminal carries out speech business and continues according to the user contracting data of described user terminal and position area information.
In the circuit domain fallback method of another embodiment of the present invention, also include:
If the MSC inquired is identical with MSC when combining attachment, MME indicates eNodeB that described user terminal is carried out circuit domain dropping；
ENodeB instructs described user terminal to fall after rise to circuit domain；
Described user terminal from LTE network fall after rise to access after circuit-domain network described combine attachment time MSC carry out speech business.
In the circuit domain fallback method of another embodiment of the present invention, in described LTE network, user terminal includes to described eNodeB initiation voice service request:
After MSC when combining attachment of described user terminal receives the calling access message of user terminal described in request call, the association MME information according to storage, send paging request message to described MME；
MME initiates paging by described eNodeB to described user terminal；
Described user terminal is set up with described eNodeB and is connected and sends voice service request to described eNodeB.
In the circuit domain fallback method of another embodiment of the present invention, described eNodeB sends between MSC information corresponding for LAI described in the contingency table that business request information pre-builds with described MME inquiry to MME, also includes:
MME returns call treatment message to MSC when combining attachment of described user terminal, with notify described combine attachment time MSC call present.
In the circuit domain fallback method of another embodiment of the present invention, after described MME indicates eNodeB that described user terminal is carried out circuit domain dropping, also include: MME to described combine attachment time MSC send and reselect route instruction information, instruct described MSC when combining attachment described calling is accessed message be forwarded to described in the MSC that inquires；
Described user terminal access described in the MSC that inquires send voice service request to this MSC inquired and include: described user terminal access described in the MSC that inquires send page-response message to this MSC inquired；
The described MSC inquired is that described user terminal carries out speech business and continues and include according to the user contracting data of described user terminal and position area information: described in the MSC that inquires according to the user contracting data of described user terminal and position area information, by call proceeding to described user terminal.
In the circuit domain fallback method of another embodiment of the present invention, also include:
If the MSC inquired is identical with MSC when combining attachment, MME indicates eNodeB that described user terminal is carried out circuit domain dropping；
ENodeB instructs described user terminal to fall after rise to circuit domain；
Described user terminal falls after rise to CS territory from LTE network, access described MSC when combining attachment and to this combine attachment time MSC send page-response message；
Described MSC when combining attachment is by call proceeding to described user terminal.
Another aspect according to embodiments of the present invention, it is provided that a kind of communication equipment, including:
Transmit-Receive Unit, for receiving the eNodeB business request information sent, this business request information includes the LAI having the user terminal present position district of speech business demand in LTE network, and wherein, LAI uniquely identifies the community in a circuit-domain network；
Memory element, for storing the contingency table first set up, described contingency table includes LTE network and the corresponding relation list of each MSC and homing position district LAI thereof in circuit-domain network superimposed coverage area；
Query unit, for inquiring about MSC information corresponding for LAI described in described contingency table, and comparison query to MSC whether identical with MSC when combining attachment associating user terminal described in MSC information；
Service Processing Unit, when MSC for inquiring in query unit is different from MSC when combining attachment, according to the MSC information that query unit inquires, with the co-location more new technological process that the MSC service system inquired initiates tracking area and lane place, described MSC service system includes the VLR of MSC and the correspondence thereof inquired, the co-location of tracking area and lane place is after more new technological process completes, and MSC service system obtains user contracting data and the position area information of described user terminal；And after in the co-location of tracking area and lane place, more new technological process completes, described user terminal is carried out circuit domain dropping by instruction eNodeB, in order to the MSC inquired described in the access of described user terminal carries out speech business.
In the communication equipment of another embodiment of the present invention, described Service Processing Unit, it is additionally operable to when the MSC that query unit inquires is identical with MSC when combining attachment, described user terminal is carried out circuit domain dropping by instruction eNodeB, in order to described user terminal from LTE network fall after rise to access after circuit-domain network described combine attachment time MSC carry out speech business.
In the communication equipment of another embodiment of the present invention, described Transmit-Receive Unit, be additionally operable to receive MSC when combining attachment of the described user terminal paging request message sent, described paging request message by described combine attachment time the association MME information that receives after the calling of user terminal described in request call accesses message according to storage of MSC send；And initiate paging by described eNodeB to described user terminal；
Described Service Processing Unit, is additionally operable to, after Transmit-Receive Unit receives the eNodeB business request information sent, return call treatment message to MSC when combining attachment of described user terminal, with notify described combine attachment time MSC call present；And after described user terminal is carried out circuit domain dropping by instruction eNodeB, to described combine attachment time MSC send and reselect route instruction information, instruct described MSC when combining attachment described calling is accessed message be forwarded to described in the MSC that inquires.
In the communication equipment of another embodiment of the present invention, described Service Processing Unit, it is additionally operable to when the MSC that query unit inquires is identical with MSC when combining attachment, described user terminal is carried out circuit domain dropping by instruction eNodeB, so that described user terminal access described MSC when combining attachment and to this combine attachment time MSC send page-response message, by described combine attachment time MSC by call proceeding to described user terminal.
Another aspect according to embodiments of the present invention, it is provided that a kind of circuit domain dropping system, including:
ENodeB, it is arranged in LTE network, when having speech business demand for user terminal in the lte networks, described user terminal is indicated to carry out the measurement of different system cell, and receive the cell measurement reporting reported after described user terminal carries out the measurement of different system cell, this cell measurement reporting includes the LAI in described user terminal present position district, and wherein, LAI uniquely identifies the community in a circuit-domain network；And sending business request information to MME, described business request information includes described LAI；And the instruction according to MME, instruct the MSC inquired described in the falling extremely of described user terminal；
MME, is used for storing contingency table, and described contingency table includes LTE network and the corresponding relation list of each MSC and homing position district LAI thereof in circuit-domain network superimposed coverage area；And when receiving the eNodeB business request information sent, MSC information corresponding for LAI described in the contingency table that pre-builds of inquiry, and comparison query to MSC whether identical with MSC when combining attachment associating user terminal described in MSC information；If the MSC inquired is different from MSC when combining attachment, according to the MSC information inquired, with the co-location more new technological process that the MSC service system inquired initiates tracking area and lane place, described MSC service system includes the VLR of MSC and the correspondence thereof inquired；And after in the co-location of tracking area and lane place, more new technological process completes, described user terminal is carried out circuit domain dropping by instruction eNodeB；
The MSC inquired, after in the co-location of tracking area and lane place, more new technological process completes, it is thus achieved that the user contracting data of described user terminal and position area information storage are in vlr；
Described user terminal, the MSC being used for inquiring described in accessing carries out speech business.
In the circuit domain dropping system of another embodiment of the present invention, described MME is specially the communication equipment that any of the above-described embodiment of the present invention provides.
nullThe circuit domain fallback method provided based on the above embodiment of the present invention and communication equipment、Communication system，When user terminal in LTE network has speech business demand，ENodeB just indicating user terminal carries out the measurement of different system cell，Obtain the lane place that user terminal is currently located，And eNodeB sends the business request information carrying this lane place to MME，Whether the MSC that in the MME contingency table that pre-builds of inquiry, this lane place is corresponding is MSC when combining attachment of this user terminal，If not，Then initiate the co-location more new technological process of TA/LA with the MSC service system inquired，The MSC inquired is made to obtain user contracting data and the position area information of described user terminal，And indicating user terminal carries out circuit domain dropping to the MSC inquired，The MSC inquired by this is that user terminal continues speech business.Compared with prior art, in the embodiment of the present invention, user terminal is without launch position more new technological process again after service fail, decrease business duration, be effectively ensured quality of service, solve the MSC newly searched different from MSC when combining attachment time, user terminal initiate that lasting of CS speech business be longer to the MSC that newly searches, the speech business problem such as unsuccessfully.
Below by drawings and Examples, technical scheme is described in further detail.
Detailed description of the invention
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should also be noted that unless specifically stated otherwise, the parts otherwise set forth in these embodiments and positioned opposite, the numerical expression of step and numerical value do not limit the scope of the invention.
Simultaneously, it should be appreciated that for the ease of describing, the size of the various piece shown in accompanying drawing is not draw according to actual proportionate relationship.
Description only actually at least one exemplary embodiment is illustrative below, never as any restriction to the present invention and application or use.
The known technology of person of ordinary skill in the relevant, method and apparatus are likely to be not discussed in detail, but in the appropriate case, described technology, method and apparatus should be considered a part for description.
Shown here with in all examples discussed, any occurrence should be construed as merely exemplary, not as restriction.Therefore, other example of exemplary embodiment can have different values.
It should also be noted that similar label and letter below figure represent similar terms, therefore, once a certain Xiang Yi accompanying drawing is defined, then it need not be further discussed in accompanying drawing subsequently.
When the UE user in LTE needs to use CS speech business, MSC service system (MSC/VLR) available around can be searched for, it is thus achieved that the data such as the Location Area Identification (LAI) in the belonging positions district of corresponding wireless access capability and MSC/VLR service system.In existing network CSFB process when the UE MSC detected is different from the MSC combining attachment, CS voice service request can be rejected, and need to re-start position update flow by UE and complete subsequent voice calls and continue.The embodiment of the present invention is for this problem, by instructing UE carry out cell measurement in advance and increase MME to the contrast judgement of MSC and in the flow process judging actively to carry out after CSMSC changes MSC attachment update, EPC (evolution block core net) nucleus equipment carries out CSFB according to the UE CSMSC/VLR service system searched.
Fig. 1 is the flow chart of one embodiment of CSFB method of the present invention.As it is shown in figure 1, the CSFB method of this embodiment includes:
110, when in LTE network, UE has speech business demand, eNodeB (evolution base station) in LTE network indicates UE to carry out the measurement of different system cell, and receiving the cell measurement reporting reported after UE carries out the measurement of different system cell, this cell measurement reporting includes the LAI in UE present position district.
Wherein, LAI uniquely identifies the community in a CS network.
Speech business in the embodiment of the present invention includes the CS business beyond short message service, for instance voice, USSD (unstructured supplementary data traffic), supplementary service etc..
120, eNodeB send business request information to MME, and this business request information includes the LAI in cell measurement reporting.
MSC information corresponding for LAI in 130, the MME contingency tables that pre-build of inquiry, and comparison query to MSC when combining attachment associating UE in MSC information of MSC and storage whether identical.
140, if the MSC inquired is different from MSC when combining attachment, MME is according to the MSC information inquired, with the co-location more new technological process that the MSC service system inquired initiates TA/LA (tracking area and lane place).
Wherein, MSC service system includes the VLR (VLR Visitor Location Register) of MSC and the correspondence thereof inquired, and can be collectively expressed as MSC/VLR in the embodiment of the present invention.
The co-location of TA/LA more new technological process adopts existing specification flow process, repeats no more in the embodiment of the present invention.
The co-location of 150, TA/LA is after more new technological process completes, and MSC service system obtains the user contracting data of UE and position area information and stores, and MME indicates eNodeB that this UE is carried out CSFB.
160, eNodeB instruct UE to fall after rise to the MSC inquired.
170, UE access the MSC inquired carries out speech business.
nullBased on the circuit domain fallback method that the above embodiment of the present invention provides，When user terminal in LTE network has speech business demand，ENodeB just indicating user terminal carries out the measurement of different system cell，Obtain the lane place that user terminal is currently located，And eNodeB sends the business request information carrying this lane place to MME，Whether the MSC that in the MME contingency table that pre-builds of inquiry, this lane place is corresponding is MSC when combining attachment of this user terminal，If not，Then initiate the co-location more new technological process of TA/LA with the MSC service system inquired，The MSC inquired is made to obtain user contracting data and the position area information of described user terminal，And indicating user terminal carries out circuit domain dropping to the MSC inquired，The MSC inquired by this is that user terminal continues speech business.Compared with prior art, in the embodiment of the present invention, user terminal is without launch position more new technological process again after service fail, decrease business duration, be effectively ensured quality of service, solve the MSC newly searched different from MSC when combining attachment time, user terminal initiate that lasting of CS speech business be longer to the MSC that newly searches, the speech business problem such as unsuccessfully.
In another embodiment of CSFB method of the present invention, also including the operation setting up contingency table in advance in MME, this contingency table includes the corresponding relation list of LTE network and each MSC in the network overlapped coverage of CS and the LAI of ownership LA thereof.
In another embodiment of CSFB method of the present invention, after in the co-location of TA/LA, more new technological process completes, MME can also report the latest position information of this UE to the HSS (home subscriber server) of above-mentioned UE, including the LAI information in the MSC inquired and business request information.
Fig. 2 is the flow chart of CSFB another embodiment of method of the present invention.This embodiment initiates caller speech business for UE user, and the CSFB method of the embodiment of the present invention is further described.As in figure 2 it is shown, the CSFB method of this embodiment includes:
210, in LTE network, UE initiates voice service request to eNodeB, eNodeB in LTE network indicates UE to carry out the measurement of different system cell, and receives the cell measurement reporting reported after UE carries out the measurement of different system cell, and this cell measurement reporting includes the LAI in UE present position district.
Wherein, LAI uniquely identifies the community in a CS network.
220, eNodeB to MME send business request information (ExtendedServiceRequest), and this business request information includes the LAI in cell measurement reporting.
230, MME inquire about MSC information corresponding for LAI in cell measurement reporting from the contingency table pre-build, and comparison query to MSC when combining attachment associating UE in MSC information of MSC and storage whether identical.
If the MSC inquired is different from MSC when combining attachment, knows that UE has been enter into another non-MSC service area combining attachment, perform the operation of 240.Otherwise, if the MSC inquired is identical with MSC when combining attachment, perform the operation of 290.
240, MME according to the MSC information inquired, with the co-location more new technological process that the MSC service system MSC/VLR inquired initiates TA/LA.
250, the co-location of TA/LA is after more new technological process completes, MSC service system MSC/VLR obtains the user contracting data of UE and position area information, it can in addition contain obtain the status information (such as shutdown, busy, idle etc. status information) of this UE, and stores these information；MME reports the up-to-date address of this UE to HSS, including the position area information of the MSC/VLR inquired He this UE, and issues text modification request to eNodeB, and this UE is carried out CSFB by instruction eNodeB.
260, eNodeB instruction UE are redirected back to by RRC (wireless heterogeneous networks) and drop down onto the MSC inquired.
270, UE access the MSC inquired and send voice service request to this MSC inquired.
280, the MSC inquired is that UE carries out speech business and continues according to the user contracting data of UE and position area information.
Now, owing to new MSC (MSC namely inquired) storage has the relevant information of this UE user, call setup flow process just can successfully be carried out.
Afterwards, the follow-up flow process of the present embodiment is not performed.
290, MME to eNodeB send CS falls instruction (CSFallbackIndicator) after rise, and UE is carried out CS falling by instruction eNodeB.
300, eNodeB instruct UE to fall after rise to CS.
310, UE fall after rise to MSC when accessing associating attachment after CS network from LTE network and to carry out speech business.
Fig. 3 is the flow chart of CSFB another embodiment of method of the present invention.The CSFB method of the embodiment of the present invention, for the UE user in LTE as speech business time called, is further described by this embodiment.As it is shown on figure 3, the CSFB method of this embodiment includes:
400, when the UE user under LTE network is as time called, according to this UE user information in HLR (attaching position register), call the MSC service system MSC/VLR that will be connected to when this UE combines attachment.
410, after MSC when UE combines attachment receives the calling access message of request call UE, association MME information according to storage, send paging request message (SGsAPPAGINGREQUEST) to association MME, wherein can include IMSI (international mobile subscriber identity), TMSI (temporary mobile subscriber identity, service identification, calling part user number, the location area information of this UE user.
420, MME to eNodeB send paging (Paging) message, are initiated paging (Paging) flow process eated dishes without rice or wine to UE by eNodeB.
430, UE and eNodeB sets up and connects and send voice service request (ExtendedServiceRequest) to eNodeB.
440, the eNodeB in LTE network indicates UE to carry out the measurement of different system cell, and receives the cell measurement reporting reported after UE carries out the measurement of different system cell, and this cell measurement reporting includes the LAI in UE present position district.
Wherein, LAI uniquely identifies the community in a CS network.
450, eNodeB send business request information to MME, and this business request information includes the LAI in cell measurement reporting.
After 460, the MME business request information receiving UE, return call treatment message (SGsAPSERVICEREQUEST) to MSC when combining attachment of UE, call present with MSC when notifying associating attachment.
470, MME inquire about the MSC information corresponding for LAI in cell measurement reporting from the contingency table pre-build, comparison query to MSC when combining attachment associating UE in MSC information of MSC and storage whether identical.
If the MSC inquired is different from MSC when combining attachment, perform the operation of 480.Otherwise, if the MSC inquired is identical with MSC when combining attachment, perform the operation of 540.
480, MME according to the MSC information inquired, with the co-location more new technological process that the MSC service system MSC/VLR inquired initiates TA/LA.
490, the co-location of TA/LA is after more new technological process completes, MSC service system obtains user contracting data and the position area information of UE, it can in addition contain obtain the status information (such as shutdown, the status information such as busy, idle) of this UE, and storing above-mentioned information, the user data in HLR has been also carried out renewal；MME reports the up-to-date address of this UE to HSS, including the position area information of the MSC/VLR inquired He this UE, and to eNodeB issue text modification request instruction eNodeB this UE is carried out CSFB.
500, MME sends to MSC when combining attachment and reselects route instruction information, routing routing iinformation including the MSC inquired, instruct MSC during associating attachment that calling is accessed message and be forwarded to the MSC inquired, reselect the MSC information that route instruction information includes inquiring, such as MSCID (mark), MSCID uniquely identifies a MSC.
Wherein, being absent from execution sequence restriction between this operation 500 and 490, the two can perform any one operation to first carry out simultaneously.
510, eNodeB instruction UE are redirected back to by RRC and drop down onto the MSC inquired.
520, UE access the MSC inquired and send page-response message to this MSC inquired.
530, the MSC inquired is according to the user contracting data of UE and position area information, by call proceeding to UE.
Afterwards, the follow-up flow process of the present embodiment is not performed.
540, MME to eNodeB send initial UE context sets up message (InitialUEContextSetup), falls instruction (CSFallbackIndicator) after rise including CS, and UE is carried out CS falling by instruction eNodeB.
550, eNodeB instruct UE to fall after rise to CS.
560, UE fall after rise to CS from LTE network, after completing to eat dishes without rice or wine to connect, MSC when accessing associating attachment and to this combine attachment time MSC send page-response message (pagingresponse), enter call proceeding flow process.
570, MSC when combining attachment is by call proceeding to this UE.
Fig. 4 is the structural representation of one embodiment of communication equipment of the present invention.The communication equipment of this embodiment can as MME, it is achieved the corresponding function of MME in the above-mentioned each embodiment of the method for the present invention.As shown in Figure 4, the communication equipment of this embodiment includes Transmit-Receive Unit, memory element, query unit and Service Processing Unit.Wherein:
Transmit-Receive Unit, for receiving the eNodeB business request information sent, this business request information includes the LAI having the UE present position district of speech business demand in LTE network, and wherein, LAI uniquely identifies the community in a CS network.
Memory element, for storing the contingency table first set up, this contingency table includes LTE network and the corresponding relation list of each MSC and homing position district LAI thereof in the network overlapped coverage of CS.
Query unit, for inquiring about MSC information corresponding for LAI in contingency table, and comparison query to MSC whether identical with MSC when combining attachment associating UE in MSC information.
Service Processing Unit, when MSC for inquiring in query unit is different from MSC when combining attachment, according to the MSC information that query unit inquires, with the co-location more new technological process that the MSC service system inquired initiates TA/LA, MSC service system therein includes the VLR (being expressed as MSC/VLR) of MSC and the correspondence thereof inquired, the co-location of TA/LA is after more new technological process completes, and MSC service system can obtain user contracting data and the position area information of UE；And after in the co-location of TA/LA, more new technological process completes, UE is carried out CS falling by instruction eNodeB, in order to UE accesses the MSC inquired and carries out speech business.
Based on the communication equipment that the above embodiment of the present invention provides, when user terminal in LTE network has speech business demand, eNodeB just indicating user terminal carries out the measurement of different system cell, obtain the lane place that user terminal is currently located, and eNodeB sends the business request information carrying this lane place to MME, whether the MSC that in the MME contingency table that pre-builds of inquiry, this lane place is corresponding is MSC when combining attachment of this user terminal, if not, then initiate the co-location more new technological process of TA/LA with the MSC service system inquired, the MSC inquired is made to obtain user contracting data and the position area information of described user terminal, and indicating user terminal carries out circuit domain dropping to the MSC inquired, the MSC inquired by this is that user terminal continues speech business.Compared with prior art, in the embodiment of the present invention, user terminal is without launch position more new technological process again after service fail, decrease business duration, be effectively ensured quality of service, solve the MSC newly searched different from MSC when combining attachment time, user terminal initiate that lasting of CS speech business be longer to the MSC that newly searches, the speech business problem such as unsuccessfully.
In another embodiment of communication equipment of the present invention, Service Processing Unit, it is additionally operable to when the MSC that query unit inquires is identical with MSC when combining attachment, UE is carried out CS falling by instruction eNodeB, in order to the MSC that UE falls after rise to CS network when accessing associating attachment from LTE network carries out speech business.
Based in another embodiment of communication equipment of the present invention, Transmit-Receive Unit, being additionally operable to receive MSC when combining attachment of the UE paging request message sent, the association MME information that this paging request message is received after the calling of request call UE accesses message according to storage by MSC when combining attachment sends；And initiate paging by eNodeB to UE.Correspondingly, Service Processing Unit, it is additionally operable to after Transmit-Receive Unit receives the eNodeB business request information sent, returns call treatment message to MSC when combining attachment of UE, call present with MSC when notifying associating attachment；And after UE is carried out CS falling by instruction eNodeB, send to MSC when combining attachment and reselect route instruction information, instruct MSC during associating attachment that calling is accessed message and be forwarded to the MSC inquired.
Further, Service Processing Unit can be additionally used in when the MSC that query unit inquires is identical with MSC when combining attachment, UE is carried out CS falling by instruction eNodeB, so that UE access associating attachment time MSC and to this combine attachment time MSC send page-response message, by MSC when combining attachment by call proceeding to UE.
Fig. 5 is the structural representation of one embodiment of CSFB system of the present invention.The CSFB system of this embodiment can be used for realizing the CSFB method flow of the various embodiments described above of the present invention.As it is shown in figure 5, this embodiment system includes eNodeB, MME, MSC and UE.Wherein:
ENodeB is arranged in LTE network, when having speech business demand for UE in the lte networks, instruction UE carries out the measurement of different system cell, and receive the cell measurement reporting reported after UE carries out the measurement of different system cell, this cell measurement reporting includes the LAI in UE present position district, wherein, LAI uniquely identifies the community in a CS network；And send business request information to MME, including LAI；And the instruction according to MME, instruct UE to fall after rise to the MSC inquired.
MME, is used for storing contingency table, and this contingency table includes LTE network and the corresponding relation list of each MSC and homing position district LAI thereof in the network overlapped coverage of CS；And when receiving the eNodeB business request information sent, MSC information corresponding for LAI in the contingency table that pre-builds of inquiry, and comparison query to MSC whether identical with MSC when combining attachment associating UE in MSC information；If the MSC inquired is different from MSC when combining attachment, according to the MSC information inquired, with the co-location more new technological process that the MSC service system inquired initiates TA/LA, MSC service system includes the VLR (MAC/VLR) of MSC and the correspondence thereof inquired；And after in the co-location of TA/LA, more new technological process completes, UE is carried out CS falling by instruction eNodeB.
The MSC inquired, after in the co-location of TA/LA, more new technological process completes, it is thus achieved that the user contracting data of UE and position area information storage are in vlr.
UE, carries out speech business for accessing the MSC inquired.
Exemplarily, MME specifically can pass through the structure realization of communications device embodiments shown in Fig. 4.
Based on the communication system that the above embodiment of the present invention provides, when user terminal in LTE network has speech business demand, eNodeB just indicating user terminal carries out the measurement of different system cell, obtain the lane place that user terminal is currently located, and eNodeB sends the business request information carrying this lane place to MME, whether the MSC that in the MME contingency table that pre-builds of inquiry, this lane place is corresponding is MSC when combining attachment of this user terminal, if not, then initiate the co-location more new technological process of TA/LA with the MSC service system inquired, the MSC inquired is made to obtain user contracting data and the position area information of described user terminal, and indicating user terminal carries out circuit domain dropping to the MSC inquired, the MSC inquired by this is that user terminal continues speech business.Compared with prior art, in the embodiment of the present invention, user terminal is without launch position more new technological process again after service fail, decrease business duration, be effectively ensured quality of service, solve the MSC newly searched different from MSC when combining attachment time, user terminal initiate that lasting of CS speech business be longer to the MSC that newly searches, the speech business problem such as unsuccessfully.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can be completed by the hardware that programmed instruction is relevant, aforesaid program can be stored in a computer read/write memory medium, this program upon execution, performs to include the step of said method embodiment；And aforesaid storage medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CDs.
In this specification, each embodiment all adopts the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, same or analogous part cross-reference between each embodiment.For system embodiment, owing to it is substantially corresponding with embodiment of the method, so what describe is fairly simple, relevant part illustrates referring to the part of embodiment of the method.
It is likely to be achieved in many ways the method for the present invention, system.Such as, can by software, hardware, firmware or software, hardware, firmware any combination realize the method and system of the present invention.For the said sequence of step of described method merely to illustrate, the step of the method for the present invention is not limited to order described in detail above, unless specifically stated otherwise.Additionally, in certain embodiments, can being also record program in the recording medium by the invention process, these programs include the machine readable instructions for realizing the method according to the invention.Thus, the present invention also covers the record medium of the storage program for performing the method according to the invention.