CN104349302A - Roaming processing method for circuit domain fallback business, and network elements - Google Patents
Roaming processing method for circuit domain fallback business, and network elements Download PDFInfo
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- CN104349302A CN104349302A CN201310316608.0A CN201310316608A CN104349302A CN 104349302 A CN104349302 A CN 104349302A CN 201310316608 A CN201310316608 A CN 201310316608A CN 104349302 A CN104349302 A CN 104349302A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/12—Mobility data transfer between location registers or mobility servers
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Abstract
The invention relates to a roaming processing method for circuit domain fallback business, and network elements. The method comprises steps that a paging request sent by a mobile management unit of a circuit switching (CS) domain is received by an original mobile management unit of a packet switching (PS) domain; a new mobile management unit of user equipment accessing to the PS domain is determined by the original mobile management unit of the PS domain, a message for notification is sent to the mobile management unit of the CS domain, and the message contains notification information used for notifying a mobile management flow performing the PS domain. According to the roaming processing method and the network elements, roaming paging failure in the circuit domain fallback business can be avoided.
Description
Technical field
The present invention relates to the system and method for communication field process roaming, is especially the roaming processing method in circuit domain dropping business and network element (comprising packet-switched domain mobile management unit and circuit commutative field mobile switch unit).
Background technology
SAE (system architecture evolution) network is the new generation of wireless network skill in order to alternative traditional circuit domain switching network that 3GPP (3rd Generation Partnership Project, third generation partner program) organizes to set up.It comprises LTE (Long Term Evolution, Long Term Evolution is eated dishes without rice or wine) and EPC (evolved Packet Core, the packet-based core networks of evolution), and as shown in Figure 1, the function of each network element illustrates its framework as follows.
Subscriber equipment (User Equipment, be called for short UE): subscriber equipment has can access UTRAN/GERAN(Universal Mobile Telecommunication System Radio Access Network/GSM EDGE Radio Access Network, global system for mobile communications wireless access network, refer to the wireless network of GPRS, UTRAN represents 3G, and GERAN represents 2G) and the ability of LTE two kinds of wireless networks.UE, due to capabilities limits and energy saving requirement, can only reside in a wireless system in the same moment and (be called Single Radio), such as when UE resides under LTE time, now cannot receive beep-page message from UTRAN/GERAN.
Evolution radio node (evolved NodeB is called for short eNodeB): the radio node of evolution can provide the up-downgoing speed higher than UTRAN on eating dishes without rice or wine, lower transmission delay and more reliably wireless transmission.The access that eNodeB is terminal provides Radio Resource, simultaneously and set up the link of S1 chain of command between core net MME.
Mobility Management Entity (Mobility Management Entity, be called for short MME), it is a chain of command entity, the server of interim storage user data, is in charge of and stores UE context (such as UE/ user ID, mobility management states, user security parameters etc.), for user distributes temporary mark GUTI (Globally Unique Temporary Identity, global unique temporary identity), MME was responsible for user and carries out authentication to user from LTE accesses time.
SAE gateway (SAE Gateway, System Architecture Evolution GW is called for short SAE GW), is a user entity, is responsible for user face data route processing.SAE GW is generally divided into gateway Serving GW and packet data network gateway PDN GW, Serving GW to be responsible for ambulant anchor point between LTE and UMTS, and under idle condition, downlink data triggers MME and SGSN paging; PDN GW is responsible for UE and accesses PDN(Packet Data Network, Packet Data Network) gateway function, be user distributing user IP (Internet Protocol) address.PDN GW and Serving GW may close and be located in a physical entity.
HSS (home subscriber server, home subscriber server), for preserving the subscription data of user, the MME title (MME NAME) at recording user place simultaneously.
Fig. 1 gives the framework of traditional circuit domain switching network simultaneously.Wherein, core network element has mobile switching centre's (Mobile Switching Center is called for short MSC) and VLR Visitor Location Register (Visitor Location Register is called for short VLR), MSC and VLR is physically generally combined.
3G Radio Access Controller (RNC, Radio Network Controller) or base station controller (BSC, Base Station Controller), be responsible for the wireless activity of control and management user.
Traditional circuit domain switching network uses attaching position register (Home Location Register, HLR) to preserve the CAMEL-Subscription-Information of user and the address of VLR.In called calling, HLR can obtain the animated walk-through number (Mobile Subscriber Roaming Number, MSRN) of user from VLR.In FIG, HLR and HSS is served as by a physical NE.
Gateway MSC (Gateway Mobile Switching Center, GMSC) is for routing the call to the MSC at user place.When there being the calling to mobile subscriber, GMSC obtains the MSRN of user, according to MSRN routing call after pressing by HLR.
Between the MME network element and the VLR of traditional circuit domain switching network of SAE, connected by SGs interface.
It is long-term trend that SAE network substitutes traditional circuit domain switching network.In this process, because traditional circuit domain switching network wireless coverage is better, serve comparatively stable, so it is effectively supplementing of SAE network.When SAE cannot provide satisfied traditional voice service, can transfer to provide regarding service by traditional circuit domain switching network.This mechanism returning back to traditional circuit domain switching network is called circuit switching fall-back technology (CSFB, Circuit Switch Fallback).The UE that traditional circuit domain switching network carries out business can be fallen back to and be called bimodulus single-frequency UE (Dual Mode Single Radio UE).CSFB technology, between the MME and the VLR of traditional circuit domain switching network of SAE, builds SGs interface.By this interface, MME can allow the UE roamed under LTE trigger the position update flow of traditional circuit domain switching network, thus makes UE while SAE activity, registers at traditional circuit domain switching network.This process comprises the steps:
UE under step 201:LTE starts shooting or changes tracking area (Tracking Area, TA), initiates start (ATTACH) or tracing section updating (Tracking Area Update, TAU) operation;
Step 202:MME receives above-mentioned message, carries out the registration to HSS in SAE;
Step 203: after succeeding in registration, MME, by the tracking area at UE place, derives the lane place (LAI of UE in traditional circuit domain switching network, Location Area Identity), and navigate to corresponding VLR, by SGs interface, MME sends position updating request to this VLR;
Step 204: if VLR does not have user data, or VLR thinks that user data is unreliable, and VLR sends position updating request to HLR;
Step 205:HLR will send ISD (insertion user data requests) to VLR, VLR recording user subscription data, and return response;
The successful respond that step 206:HLR home position upgrades, the number of recording user place VLR;
Step 207:VLR home position has upgraded message to MME, and by the status modifier of SGs interface for activating.Select as a network, can carry VLR in this message is the Temporary Mobile Subscriber Identity (TMSI, Temporary Mobile Subscriber Identities) that UE distributes.
User is after HLR registration, and the upper SGs interface status flag to user of MSC/VLR is for activating, and follow-up when receiving called service like this, MSC/VLR judges this state, carries out paging by SGs interface to user.This process is see Fig. 3, and concrete step comprises:
Step 301:GMSC is receiving the IAM of outer net (Initial Address Message, initial address message) after, called HLR is found according to called MS ISDN number (i.e. subscriber directory number), and send SRI (Send Routing Information to HLR, obtain routing iinformation) request, the inside is with the Mobile Subscriber International ISDN Number of user.
The MSC/VLR number that step 302:HLR finds user to register according to Mobile Subscriber International ISDN Number, and send PRN (Provide Roaming Number to this MSC/VLR, Provide Roaming Number) request, now MSC/VLR is the MSC/VLR that UE registers from LTE/EPC.MSC/VLR distributes interim subscriber identity MSRN, and returns to HLR.This MSRN unique identification MSC/VLR and called UE.
Step 303:HLR returns SRI and responds to GMSC, band MSRN.
So step 304:GMSC routes the call to MSC/VLR according to MSRN.
Step 305:MSC/VLR checks that the SGs Interface status of user is for activating, and initiates CS paging from SGs to MME, so MME initiates CS paging in LTE inside, and returns service request to MSC/VLR;
Step 306:UE return back to circuit domain, initiates to page reply from traditional circuit domain switching network
Step 307: if needed, MSC/VLR carries out access operation
Setup requests Setup is sent to UE by step 308:MSC/VLR
Step 309:MSC/VLR, UE complete remaining called process of establishing.
For said process, there is following possibility, UE is before receiving paging request, be integrated into another MME, UE is initiating updating of tracking area on new MME, at this moment former MME is because user or removes, and unsuccessfully replys so can return SGs interface paging message, causes when this calling cannot be successful.This scene comprises following steps:
Step 401:GMSC is receiving IAM message, and send SRI to HLR, the Mobile Subscriber International ISDN Number of user is carried in the inside;
Step 402:HLR sends PRN and asks to recorded MSC/VLR, and MSC/VLR distributes interim subscriber identity MSRN, and returns to HLR, and this MSC/VLR is designated as MSC/VLR1;
Step 403:HLR returns SRI and responds to GMSC, band MSRN;
Step 404:GMSC routes the call to MSC/VLR1 according to MSRN;
Step 405:MSC/VLR1 checks that the SGs Interface status of user is for activating, and sends SGs interface paging to MME1;
Step 406:UE, before receiving beep-page message, moves to MME2, in the request of MME2 initiating updating of tracking area;
Step 407:MME2 and MME1 obtains the context of UE alternately;
Step 408:MME1, because UE or leaves, returns SGs interface paging refuse information;
Step 409:MSC/VLR1 receives this message, judges this call failure, sends release message to GMSC.
In said process, because UE or removes, the SGs interface paging failure that MSC/VLR1 initiates, when secondary calling cannot be set up, causes damage to client, therefore needs consideration to be optimized.
Summary of the invention
The technical problem to be solved in the present invention is to provide roaming processing method in a kind of circuit domain dropping business and network element, to solve the technical problem of the roaming paging failure in available circuit domain dropping business.
For solving the problems of the technologies described above, the invention provides the roaming processing method in a kind of circuit domain dropping business, the method comprises:
The former mobile management unit receiving circuit in packet switching (PS) territory exchanges the paging request of the mobile management unit transmission in (CS) territory;
The former mobile management unit in PS territory judges that subscriber equipment (UE) accesses the new mobile management unit in PS territory, mobile management unit to CS territory sends the message for notifying, described message carries to notify the current announcement information performing the mobile management flow process in PS territory.
Alternatively, when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit carrying described CS territory in the interface position update request that the new mobile management unit in described PS territory sends to the new mobile management unit in described CS territory is the identification information distributing UE.
Further, the described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
Alternatively, described mobile management flow process comprises PS territory position update flow (TAU) or switching flow.
For solving the problems of the technologies described above, present invention also offers the roaming processing method in another kind of circuit domain dropping business, the method comprises:
The mobile management unit in CS territory receives the message for notifying of the former mobile management unit transmission in PS territory, and described message is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Paging is continued when the mobile management unit in described CS territory determines that the mobile management flow process in PS territory completes.
Alternatively, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the mobile management unit in described CS territory continues paging and refers to that the mobile management unit in described CS territory is initiated to the interface paging of the new mobile management unit in PS territory.
Further, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, before the mobile management unit continuation paging in described CS territory, the method also comprises:
The mobile management unit in described CS territory receives the interface position update request of the new mobile management unit transmission in PS territory; Or
The mobile management unit in described CS territory starts timer after receiving the described message for notifying, and the interface position update request that the new mobile management unit receiving PS territory in timing sends.
Alternatively, when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit in described CS territory continues paging and refers to that the new mobile management unit in the mobile management unit notice CS territory in described CS territory completes the paging to UE.
Further, when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, before the mobile management unit continuation paging in described CS territory, the method also comprises:
The mobile management unit in described CS territory receives the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends; Or
The mobile management unit in described CS territory starts timer after receiving the described message for notifying, and in timing, receive the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends.
Alternatively, the described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
For solving the problems of the technologies described above, present invention also offers the mobile management unit in a kind of packet switching (PS) territory, the mobile management unit in this PS territory comprises:
Paging request receiver module, during former mobile management unit as the PS territory of subscriber equipment in circuit domain dropping business, the paging request that the mobile management unit for receiving CS territory sends;
Notification module, as the former mobile management unit in PS territory, and when judging that subscriber equipment (UE) accesses the new mobile management unit in PS territory, for sending the message for notifying to the mobile management unit in CS territory, described message carries to notify the current announcement information performing the mobile management flow process in PS territory.
Further, the described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
Further, described mobile management flow process comprises PS territory position update flow (TAU) or switching flow.
For solving the problems of the technologies described above, present invention also offers a kind of mobile management unit of CS territory, the mobile management unit in this CS territory comprises:
Message reception module, the message for notifying that the former mobile management unit for receiving PS territory sends, this message is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Continue paging module, for continuing paging when determining that the mobile management flow process in PS territory completes.
Further, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the mobile management unit in described CS territory continues paging and refers to that the mobile management unit in described CS territory is initiated to the interface paging of the new mobile management unit in PS territory.
Further, the mobile management unit in described CS territory also comprises location updating administration module, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the interface position update request that the new mobile management unit for receiving PS territory sends; Receive described interface position update request in the timing of the timer that described continuation paging module starts after described location updating administration module receives described interface position update request or receives the described message for notifying and just continue paging.
Further, when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit in described CS territory continues paging and refers to that the new mobile management unit in the mobile management unit notice CS territory in described CS territory completes the paging to UE.
Further, the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, and during the mobile management unit of the mobile management unit in described CS territory as former CS territory, described message reception module, also for receiving the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends; Receive described canceling position message in the timing of the timer that described continuation paging module starts after described message reception module receives described canceling position message or receives the described message for notifying and just continue paging.
The inventive method and network element, when performing the mobile management flow process in PS territory, by the former mobile management unit in PS territory, mobile management unit to CS territory sends the message for notifying, thus make the mobile management unit in CS territory understand the current mobile management flow process performing PS territory, and continue paging and make call through, improve call successful rate.
Accompanying drawing explanation
Fig. 1 is the framework of SAE and traditional circuit domain switching network in prior art;
Fig. 2 is that in prior art, under LTE, user carries out the process of traditional circuit domain switching network registration;
Fig. 3 is that in prior art, under LTE, user falls back to traditional circuit domain switching network, receives the processing procedure that traditional circuit domain switching network enters calling;
Fig. 4 is that in prior art, UE, when called service paging, moves to new MME, causes the flow process of call failure;
Fig. 5 is the flow chart of the roaming processing method embodiment 1 in circuit domain dropping business of the present invention, and wherein, UE, when called service paging, moves to new MME, and new MME launch position is updated to Anchor MSC/VLR, and Anchor MSC/VLR is again to the process of paging on new MME;
Fig. 6 is the flow chart of the roaming processing method embodiment 2 in circuit domain dropping business of the present invention, wherein, UE, when called service paging, moves to new MME, new MME launch position is updated to new MSC/VLR, and Anchor MSC/VLR transfers the call to the process on new MSC/VLR;
Fig. 7 is the flow chart of the roaming processing method embodiment 3 in circuit domain dropping business of the present invention, and wherein HLR does not support the transmission of MSC/VLR number, transmits number between new and old MSC/VLR by Send Identify process;
Fig. 8 is the schematic diagram of the roaming processing method embodiment 4 in circuit domain dropping business of the present invention;
Fig. 9 is the schematic diagram of the roaming processing method embodiment 5 in circuit domain dropping business of the present invention;
Figure 10 is the modular structure schematic diagram of the mobile management unit embodiment in packet switching of the present invention (PS) territory;
Figure 11 is the modular structure schematic diagram of the mobile management unit embodiment in CS territory of the present invention.
Embodiment
The present invention relates generally to the scene falling back to circuit switching (CS) territory when subscriber equipment (UE) is roamed in packet switching (PS) territory, wherein relates generally to PS territory mobile management unit (as Mobility Management Entity (MME)) and CS territory mobile management unit (as MSC/VLR).
It should be noted that, the mobile management unit in CS territory means VLR.But in fact VLR and MSC generally unifies is a network element.
Be described in further detail below in conjunction with the enforcement of accompanying drawing to technical scheme.
Embodiment 1
In the present embodiment 1, PS territory mobile management unit is Mobility Management Entity (MME), and CS territory mobile management unit is MSC/VLR.
As shown in Figure 5, in the present embodiment, UE, when called service paging, roams into new MME, and new MME launch position is updated to Anchor MSC/VLR, and Anchor MSC/VLR is again to paging on new MME.Particularly, it is as follows that the roaming processing method embodiment 1 in circuit domain dropping business of the present invention comprises step:
Step 501:GMSC is receiving initial address message (IAM) message, and send SRI to HLR, the Mobile Subscriber International ISDN Number of user is carried in the inside;
Step 502:HLR sends PRN and asks to recorded MSC/VLR, and MSC/VLR distributes interim subscriber identity MSRN, and returns to HLR;
In the present embodiment, before UE moves, the MSC/VLR of record is designated as MSC/VLR1, is also the former mobile management unit in packet switching (PS) territory.
Step 503:HLR returns SRI and responds to GMSC, band MSRN;
So step 504:GMSC routes the call to MSC/VLR1 according to MSRN;
Step 505:MSC/VLR1 checks that the SGs Interface status of user is for activating, and sends the request of SGs interface paging to MME1;
Step 506:UE now moves to MME2, in the request of MME2 initiating updating of tracking area; MME2 receives tracing section updating, asks the context of UE to MME1; MME1 returns the context request of UE to MME2; Now MME1 knows that UE has moved to the coverage of MME2; MME1 returns paging refuse information to MSC/VLR1, and described paging refuse information is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Described announcement information can adopt cause value or Parametric Representation.Certainly other message or special message also can be adopted to realize the effect of notice.
MSC/VLR1 can not send release message to GMSC according to this notice.
Optionally, MSC/VLR1 starts a timer and carrys out monitor subsequent and whether continue paging.
Step 507:MME2 receives tracing section updating, after transmission SGs interface position update request receives to MSC/VLR1, MSC/VLR1, and process location updating, home position upgrades and accepts;
Step 508:MSC/VLR1, according to the notice of MME1 in step 506, is initiated to the SGs interface paging request of MME2;
When starting timer in step 506, if receive step 507 location update request message in timing, MSC/VLR1 is initiated to the SGs interface paging request of MME2, otherwise MSC/VLR1 sends release message to GMSC.
In order to ensure access success, timer pre-determined number can be started to extend the stand-by period.
Under LTE, find UE after step 509:MME2 receives, and return service request to MSC/VLR2;
Step 510:UE falls back to circuit domain, initiates to page reply from traditional circuit domain switching network;
Step 511: if needed, MSC/VLR2 carries out access operation;
Setup requests Setup is sent to UE by step 512:MSC/VLR2;
Step 513:MSC/VLR2, UE complete remaining called process of establishing.
Embodiment 2
In the present embodiment 2, PS territory mobile management unit is Mobility Management Entity (MME), and CS territory mobile management unit is MSC/VLR.
As shown in Figure 6, in the present embodiment 2, UE, when called service paging, roams into new MME, and new MME launch position is updated to new MSC/VLR, and Anchor MSC/VLR transfers the call to new MSC/VLR.Particularly, it is as follows that the roaming processing method embodiment 2 in circuit domain dropping business of the present invention comprises step:
Step 601:GMSC is receiving IAM message, and send SRI to HLR, the Mobile Subscriber International ISDN Number of user is carried in the inside;
Step 602:HLR sends PRN and asks to recorded MSC/VLR, and MSC/VLR distributes interim subscriber identity MSRN, and returns to HLR.This MSC/VLR is designated as MSC/VLR1;
Step 603:HLR returns SRI and responds to GMSC, band MSRN;
So step 604:GMSC routes the call to MSC/VLR1 according to MSRN;
Step 605:MSC/VLR1 checks that the SGs Interface status of user is for activating, and sends the request of SGs interface paging to MME1;
Step 606:UE is linked into MME2, in the request of MME2 initiating updating of tracking area; MME2 receives tracing section updating, asks the context of UE to MME1; MME1 returns the context request of UE to MME2, and now MME1 knows that UE has moved to the coverage of MME2; MME1 returns paging refuse information to MSC/VLR1, and described paging refuse information is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Described announcement information can adopt cause value or Parametric Representation.Certainly other message or special message also can be adopted to realize the effect of notice.
MSC/VLR1 can not send release message to GMSC according to this notice.
Optionally, MSC/VLR1 starts a timing and carrys out monitor subsequent and whether continue paging.
Step 607:MME2 receives tracing section updating, sends SGs interface position update request to MSC/VLR2;
Step 608:MSC/VLR2 sends location update message to HLR, carries the number of MSC/VLR2;
Step 609:HLR process position updating request, user data is inserted into MSC/VLR2, and home position is updated successfully response, and MSC/VLR2 returns the renewal of SGs interface position and receives MME2;
Step 610:HLR sends canceling position message to MSC/VLR1 simultaneously, carries the number of MSC/VLR2;
Step 611:MSC/VLR1 receives the notice in canceling position message and step 606, stops the paging to former MME, utilizes the number addressing of above-mentioned MSC/VLR2, sends the request of Providing Roaming Number to MSC/VLR2;
When starting timer in step 606, if receive the canceling position message of step 611 in timing, MSC/VLR1 sends to MSC/VLR2 the request of Providing Roaming Number, otherwise MSC/VLR1 sends release message to GMSC.
In order to ensure access success, timer repeatedly can be started to extend the stand-by period.
MSC/VLR1 is except initiating to continue except paging by sending the request of Providing Roaming Number to MSC/VLR2, and alternatively, MSC/VLR1 can also send and recover call treatment message to GMSC, by GMSC, calling is rerouted to MSC/VLR2; Subsequent voice calls will process between GMSC and MSC/VLR2.This process is prior art known in those skilled in the art, no longer describes herein.
Understandably, as long as the mobile management unit in described CS territory sends message, can reach the new mobile management unit in directly or indirectly notice CS territory to the paging of UE, thus complete the object of calling, the present invention does not limit the concrete message that the mobile management unit in CS territory sends.
Step 612:MSC/VLR2 returns new roaming number MSRN2;
Step 613:MSC/VLR1, by MSRN2, routes the call to MSC/VLR2;
Step 614:MSC/VLR2 carries out SGs interface paging, finds UE after MME2 receives under LTE, and returns service request to MSC/VLR2;
Step 615:UE falls back to circuit domain, initiates to page reply from traditional circuit domain switching network;
Step 616: if needed, MSC/VLR2 carries out access operation;
Setup requests Setup is sent to UE by step 617:MSC/VLR2;
Step 618:MSC/VLR2, UE complete remaining called process of establishing.
Embodiment 3
In the present embodiment 3, HLR does not support the forwarding of MSC/VLR2 number, and is realized the transmission of MSC/VLR2 by the transmission identification request between MSC/VLR2 and MSC/VLR1.As shown in Figure 7, the roaming processing method embodiment 3 in circuit domain dropping business of the present invention specifically comprises the following steps:
Step 701:GMSC is receiving IAM message, and send SRI to HLR, the Mobile Subscriber International ISDN Number of user is carried in the inside;
Step 702:HLR sends PRN and asks to recorded MSC/VLR, and MSC/VLR distributes interim subscriber identity MSRN, and returns to HLR.This MSC/VLR is designated as MSC/VLR1;
Step 703:HLR returns SRI and responds to GMSC, band MSRN;
So step 704:GMSC routes the call to MSC/VLR1 according to MSRN;
Step 705:MSC/VLR1 checks that the SGs Interface status of user is for activating, and sends the request of SGs interface paging to MME1;
Step 706:UE is linked into MME2, in the request of MME2 initiating updating of tracking area.MME2 receives tracing section updating, asks the context of UE to MME1; MME1 returns the context request of UE to MME2, and now MME1 knows that UE has moved to the coverage of MME2; MME1 returns paging refuse information to MSC/VLR1, and described paging refuse information is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Described announcement information can adopt cause value or Parametric Representation.Certainly other message or special message also can be adopted to realize the effect of notice.
MSC/VLR1 can not send release message to GMSC according to this notice.Optionally, MSC/VLR1 starts a timing and carrys out monitor subsequent and whether continue paging.
Step 707:MME2 receives tracing section updating, sends SGs interface position update request to MSC/VLR2, and wherein carrying MSC/VLR1 is the mark that UE distributes, such as TMSI;
Step 708:MSC/VLR2 carries out location updating process, sends Send Identify Request(and sends identification request) to MSC/VLR1, wherein use above-mentioned TMSI, and carry the number of MSC/VLR2;
After step 709:MSC/VLR1 receives, record the number of MSC/VLR2 and return response;
Step 710:MSC/VLR2 sends location update message to HLR;
Step 711:HLR process position updating request, user data is inserted into MSC/VLR2, and home position is updated successfully response, and MSC/VLR2 returns the renewal of SGs interface position and receives MME2;
Step 712:HLR sends canceling position message to MSC/VLR1;
Step 713:MSC/VLR1 receives canceling position message, according to the notice in step 706, stops the paging to former MME, utilizes institute record the number addressing of MSC/VLR2, and sending Provides Roaming Number asks to arrive MSC/VLR2;
When starting timer in step 706, if the canceling position message MSC/VLR1 receiving step 713 in timing sends to MSC/VLR2 the request of Providing Roaming Number, otherwise MSC/VLR sends release message to GMSC.
In order to ensure access success, timer repeatedly can be started to extend the stand-by period.
Step 714:MSC/VLR2 returns new roaming number MSRN2;
Step 715:MSC/VLR1, by MSRN2, routes the call to MSC/VLR2;
Step 716:MSC/VLR2 carries out SGs interface paging, finds UE after MME2 receives under LTE, and returns service request to MSC/VLR2;
Step 717:UE falls back to circuit domain, initiates to page reply from traditional circuit domain switching network;
Step 718: if needed, MSC/VLR2 carries out access operation;
Setup requests Setup is sent to UE by step 718:MSC/VLR2;
Step 710:MSC/VLR2, UE complete remaining called process of establishing.
Above-described embodiment 1-3 is also applicable to UE being connected to and is linked into new MME2, and MME2 is to the process of MSC/VLR2 launch position update request.What now PS territory performed is switching flow instead of position update flow.Concrete difference is embodied in step 506(606, and 706), concrete difference is as follows:
Step X06, UE are now moved due to position, are performing the switching in PS territory.MME1 receives the handover request that base station is initiated, and judging needs to reselect a MME, is assumed to be MME2.MME1 returns paging refuse information to MSC/VLR1, and instruction UE is performing the mobile management flow process in PS territory.MSC/VLR1 can not send release message to GMSC according to this instruction.Optionally, MSC/VLR1 starts a timing and carrys out monitor subsequent and whether continue paging.MME1 performs follow-up PS territory switching flow, and after PS territory switching (handover, HO) completes, UE can pass through MME2 launch position update request.Then perform the subsequent step of Fig. 5 ~ Fig. 7 respectively according to different situations, these steps, with all similar described in before, do not repeat.
The present invention is equally applicable to MME and finds that UE is linked into the PS territory mobile management unit of GERAN/UTRAN and the situation of SGSN, in this situation, SGSN is the former mobile management unit in the new mobile management unit in PS territory, PS territory, i.e. MME, equally by message informing to MSC/VLR.
In addition, consider the saving to Internet resources, this message being used for notifying can further expand the Gs interface being applied to SGSN and MSC/VLR, namely when SGSN is processing mobile management flow process, and notice MSC/VLR.Can select initiate the paging of CS territory immediately or wait for subsequent retransmissions united paging according to different network schemers after MSC/VLR receives.
Below from the angle of the former mobile management unit in the mobile management unit in PS territory and CS territory, the inventive method is described respectively:
Embodiment 4
As shown in Figure 8, the roaming processing method embodiment 4 in circuit domain dropping business of the present invention, comprising:
Step 801: the former mobile management unit receiving circuit in packet switching (PS) territory exchanges the paging request of the mobile management unit transmission in (CS) territory;
When the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit carrying described CS territory in the interface position update request that the new mobile management unit in described PS territory sends to the new mobile management unit in described CS territory is the identification information distributing UE.
The former mobile management unit in step 802:PS territory judges that subscriber equipment (UE) accesses the new mobile management unit in PS territory, mobile management unit to CS territory sends the message for notifying, described message carries to notify the current announcement information performing the mobile management flow process in PS territory.
Described mobile management flow process comprises PS territory position update flow (TAU) or switching flow.
The described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
Embodiment 5
As shown in Figure 9, the roaming processing method embodiment 5 in circuit domain dropping business of the present invention, comprising:
The mobile management unit in step 901:CS territory receives the message for notifying of the former mobile management unit transmission in PS territory, and described message is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Step 902: continue paging when the mobile management unit in described CS territory determines that the mobile management flow process in PS territory completes.
When the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the mobile management unit in described CS territory continues paging and refers to that the mobile management unit in described CS territory is initiated to the interface paging of the new mobile management unit in PS territory.
Alternatively, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, before the mobile management unit continuation paging in described CS territory, the method also comprises:
The mobile management unit in described CS territory receives the interface position update request of the new mobile management unit transmission in PS territory; Or
The mobile management unit in described CS territory starts timer after receiving the described message for notifying, and the interface position update request that the new mobile management unit receiving PS territory in timing sends.
When the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit in described CS territory continues paging and refers to that the new mobile management unit in the mobile management unit notice CS territory in described CS territory completes the paging to UE.
When the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, before the mobile management unit continuation paging in described CS territory, the method also comprises:
The mobile management unit in described CS territory receives the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends; Or
The mobile management unit in described CS territory starts timer after receiving the described message for notifying, and in timing, receive the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends.
As described above, the described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
In order to realize said method, present invention also offers the mobile management unit in a kind of packet switching (PS) territory, as shown in Figure 10, the mobile management unit in this PS territory comprises:
Paging request receiver module, during former mobile management unit as the PS territory of subscriber equipment in circuit domain dropping business, the paging request that the mobile management unit for receiving CS territory sends;
Notification module, as the former mobile management unit in PS territory, and when judging that subscriber equipment (UE) accesses the new mobile management unit in PS territory, for sending the message for notifying to the mobile management unit in CS territory, described message carries to notify the current announcement information performing the mobile management flow process in PS territory.
Alternatively, the mobile management unit in described PS territory also comprises location updating administration module, as the PS territory of subscriber equipment in circuit domain dropping business new mobile management unit and when being registered to the new mobile management unit in CS territory, for the interface position update request sent to the new mobile management unit in described CS territory, wherein carry the identification information of described UE.
Preferably, described message is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
Alternatively, described mobile management flow process comprises PS territory position update flow (TAU) or switching flow.
In order to realize said method, present invention also offers a kind of mobile management unit of CS territory, as shown in figure 11, the mobile management unit in this CS territory comprises:
Message reception module, the message for notifying that the former mobile management unit for receiving PS territory sends, this message is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Continue paging module, for continuing paging when determining that the mobile management flow process in PS territory completes.
Alternatively, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the mobile management unit in described CS territory continues paging and refers to that the mobile management unit in described CS territory is initiated to the interface paging of the new mobile management unit in PS territory.
Alternatively, the mobile management unit in described CS territory also comprises location updating administration module, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, and the interface position update request that the new mobile management unit for receiving PS territory sends; Receive described interface position update request in the timing of the timer that described continuation paging module starts after described location updating administration module receives described interface position update request or receives the described message for notifying and just continue paging.
Alternatively, when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit in described CS territory continues paging and refers to that the new mobile management unit in the mobile management unit notice CS territory in described CS territory completes the paging to UE.
Alternatively, the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, and during the mobile management unit of the mobile management unit in described CS territory as former CS territory, described message reception module, also for receiving the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends; Receive described canceling position message in the timing of the timer that described continuation paging module starts after described message reception module receives described canceling position message or receives the described message for notifying and just continue paging.
Preferably, described message is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
The inventive method and network element, when performing the mobile management flow process in PS territory, by the former mobile management unit in PS territory, mobile management unit to CS territory sends the message for notifying, thus make the mobile management unit in CS territory understand the current mobile management flow process performing PS territory, and continue paging and make call through, improve call successful rate.
Claims (18)
1. the roaming processing method in circuit domain dropping business, it is characterized in that, the method comprises:
The former mobile management unit receiving circuit in packet switching (PS) territory exchanges the paging request of the mobile management unit transmission in (CS) territory;
The former mobile management unit in PS territory judges that subscriber equipment (UE) accesses the new mobile management unit in PS territory, mobile management unit to CS territory sends the message for notifying, described message carries to notify the current announcement information performing the mobile management flow process in PS territory.
2. the method for claim 1, it is characterized in that: when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit carrying described CS territory in the interface position update request that the new mobile management unit in described PS territory sends to the new mobile management unit in described CS territory is the identification information distributing UE.
3. the method for claim 1, is characterized in that: the described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
4. the method for claim 1, is characterized in that: described mobile management flow process comprises PS territory position update flow (TAU) or switching flow.
5. the roaming processing method in circuit domain dropping business, it is characterized in that, the method comprises:
The mobile management unit in CS territory receives the message for notifying of the former mobile management unit transmission in PS territory, and described message is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Paging is continued when the mobile management unit in described CS territory determines that the mobile management flow process in PS territory completes.
6. method as claimed in claim 5, it is characterized in that: when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the mobile management unit in described CS territory continues paging and refers to that the mobile management unit in described CS territory is initiated to the interface paging of the new mobile management unit in PS territory.
7. method as claimed in claim 5, is characterized in that: when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, and before the mobile management unit continuation paging in described CS territory, the method also comprises:
The mobile management unit in described CS territory receives the interface position update request of the new mobile management unit transmission in PS territory; Or
The mobile management unit in described CS territory starts timer after receiving the described message for notifying, and the interface position update request that the new mobile management unit receiving PS territory in timing sends.
8. method as claimed in claim 5, it is characterized in that: when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit in described CS territory continues paging and refers to that the new mobile management unit in the mobile management unit notice CS territory in described CS territory completes the paging to UE.
9. method as claimed in claim 5, is characterized in that: when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, and before the mobile management unit continuation paging in described CS territory, the method also comprises:
The mobile management unit in described CS territory receives the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends; Or
The mobile management unit in described CS territory starts timer after receiving the described message for notifying, and in timing, receive the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends.
10. method as claimed in claim 5, is characterized in that: the described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
The mobile management unit in 11. 1 kinds of packet switching (PS) territories, it is characterized in that, the mobile management unit in this PS territory comprises:
Paging request receiver module, during former mobile management unit as the PS territory of subscriber equipment in circuit domain dropping business, the paging request that the mobile management unit for receiving CS territory sends;
Notification module, as the former mobile management unit in PS territory, and when judging that subscriber equipment (UE) accesses the new mobile management unit in PS territory, for sending the message for notifying to the mobile management unit in CS territory, described message carries to notify the current announcement information performing the mobile management flow process in PS territory.
The mobile management unit in 12. PS territories as claimed in claim 11, is characterized in that: the described message for notifying is paging refuse information, and described announcement information adopts cause value or Parametric Representation.
The mobile management unit in 13. PS territories as claimed in claim 11, is characterized in that: described mobile management flow process comprises PS territory position update flow (TAU) or switching flow.
The mobile management unit in 14. 1 kinds of CS territories, is characterized in that, the mobile management unit in this CS territory comprises:
Message reception module, the message for notifying that the former mobile management unit for receiving PS territory sends, this message is carried for notifying the current announcement information performing the mobile management flow process in PS territory;
Continue paging module, for continuing paging when determining that the mobile management flow process in PS territory completes.
The mobile management unit in 15. CS territories as claimed in claim 14, it is characterized in that: when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the mobile management unit in described CS territory continues paging and refers to that the mobile management unit in described CS territory is initiated to the interface paging of the new mobile management unit in PS territory.
The mobile management unit in 16. CS territories as claimed in claim 14, it is characterized in that: the mobile management unit in described CS territory also comprises location updating administration module, when the new mobile management unit in described PS territory is registered to the mobile management unit in described CS territory, the interface position update request that the new mobile management unit for receiving PS territory sends; Receive described interface position update request in the timing of the timer that described continuation paging module starts after described location updating administration module receives described interface position update request or receives the described message for notifying and just continue paging.
The mobile management unit in 17. CS territories as claimed in claim 14, it is characterized in that: when the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, the mobile management unit in described CS territory continues paging and refers to that the new mobile management unit in the mobile management unit notice CS territory in described CS territory completes the paging to UE.
The mobile management unit in 18. CS territories as claimed in claim 14, it is characterized in that: the new mobile management unit in described PS territory is registered to the new mobile management unit in CS territory, and during the mobile management unit of the mobile management unit in described CS territory as former CS territory, described message reception module, also for receiving the canceling position message of carrying the new mobile management unit in CS territory that attaching position register (HLR) sends; Receive described canceling position message in the timing of the timer that described continuation paging module starts after described message reception module receives described canceling position message or receives the described message for notifying and just continue paging.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316608.0A CN104349302A (en) | 2013-07-25 | 2013-07-25 | Roaming processing method for circuit domain fallback business, and network elements |
| PCT/CN2014/080803 WO2015010516A1 (en) | 2013-07-25 | 2014-06-26 | Roaming processing method in circuit switched fallback service, and network element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310316608.0A CN104349302A (en) | 2013-07-25 | 2013-07-25 | Roaming processing method for circuit domain fallback business, and network elements |
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| CN104349302A true CN104349302A (en) | 2015-02-11 |
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| CN201310316608.0A Withdrawn CN104349302A (en) | 2013-07-25 | 2013-07-25 | Roaming processing method for circuit domain fallback business, and network elements |
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| WO (1) | WO2015010516A1 (en) |
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Application publication date: 20150211 |