CN101990188B - Method and system for selecting enhanced mobile switching center server - Google Patents
Method and system for selecting enhanced mobile switching center server Download PDFInfo
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Abstract
The invention discloses a method and a system for selecting an enhanced mobile switching center server. In the invention, when an Inter Node determines that a current user is a user of Internet protocol multimedia subsystem centralized service (ICS) according to an attached position updating request transmitted by user equipment (UE), the Inter Node selects the enhanced mobile switching center server (eMSC Server), transmits the attached position updating request to the eMSC Server and initiates the attachment from the UE to the eMSC Server. When the scheme is implemented, an ICS user can directly select the eMSC Server to perform Internet protocol multimedia subsystem (IMS) registration when the common mobile switching center server (MSC Server) and the eMSC Server both are available so as to successfully use the ICS.
Description
Technical field
The present invention relates to the communications field, refer to especially a kind of system of selection and system that strengthens Mobile Switching Center Server.
Background technology
Network interconnection agreement (IP, Internet Protocol) IP multimedia subsystem, IMS (IMS, IP MultimediaCore Network Subsystem) be a kind of IP-based network architecture being proposed by 3G (Third Generation) Moblie partner program (3rd GenerationPartnership Project), it has built an opening and service environment flexibly, support multimedia application, can provide abundant multimedia service for user.
IMS and access technology are irrelevant, except being GPRS (GPRS, General PacketRadio Service), WLAN (wireless local area network) (WLAN, Wireless Local Area Network) grouping (PS such as, Packet Switching) access network provides outside business, can also be global system for mobile communications (GSM, Global System for Mobile communications), unify the mobile cellular networks such as mobile communcations system (UMTS, UniversalMobile Telecommunications System) business is provided.
The mobile communications network such as GSM, UMTS adopts circuit-switched technology, is called circuit (CS, CircuitSwitched) territory, can provide basic speech business for user, and the supplementary service based on speech business.When CS territory access IMS, it develops into a kind of access way, and business provides by IMS is unified completely, and this technology is called IMS centralized traffic (ICS, IMS Centralized Service).
Figure 1 shows that the application scenarios schematic diagram of ICS, wherein, IMS subscriber equipment (UE, UserEquipment) 101 is linked into IMS 105 by PS access network 102, by IMS network, provides business; Adopt ICS technology, CS UE 103 is linked into IMS 105 by CS access network 104, by IMS network, provides business, and so, IMS network can be for adopting the UE of different access waies that business is provided.
Figure 2 shows that the configuration diagram of ICS, comprise: CS UE 201, enhancing Mobile Switching Center Server (eMSC Server, enhanced-Mobile Switch Center Server) 202, media gateway (MGW, Media Gateway) 203, CSCF (CSCF, Call Session ControlFunction) entity 204, application server (AS, Application Server) 205 and home subscriber server (HSS, Home Subscriber Server)/attaching position register (HLR, Home LocationRegister) 206.
Wherein, eMSC Server 202 is enhancings of CS territory MSC Server, except completing the access, mobile management, CCF of CS UE 201, also serve as session initiation protocol (SIP, SessionInitiation Protocol) user agent, realize the conversion between CS signaling and sip message, replace CS UE201 access IMS.
CS UE 201 is linked into eMSC Server 202 by CS control signal; EMSC Server 202 serves as user agent, the CSCF entity 204 that replaces CS UE 201 access IMS networks, and set up session connection with remote subscriber, simultaneously eMSC Server 202 controls MGW 203 and completes Media Stream on CS access bearer and the conversion between the Media Stream in IP carrying, sets up CS UE 201 and is connected with the media between remote subscriber.
Application server AS 205 is positioned at IMS, comprises business continuance server, telephone service server etc., and the services such as business continuance, telephone service can be provided for CS UE 201.
HSS/HLR 206 preserves the subscription data of CS UE 201, for calling out or session provides support.HLR can think the subset of HSS, for traditional CS territory and the service of PS territory, HLR can close and be located in same physical entity with HSS, also can be divided in different physical entities, now between HLR and HSS, there is interface, and pass through the mutual of this Interface realization information.
Fig. 3 is the register flow path of ICS in prior art, and this flow process emphasis has been described position updating process and the IMS registration process in CS territory, has ignored safety certification process wherein, CS user data insertion process, and this flow process comprises as shown in Figure 3:
Step 301, UE initiates CS territory attaching process, to eMSC Server, sends attachment position update request, carries user ID: international mobile subscriber identity (IMSI, International MobileSubscriber Identity) in this request.
Step 302, eMSC Server sends position updating request to HSS/HLR, to obtain user data.
Step 303, HSS/HLR upgrades response to eMSC Server home position.
HSS/HLR sends user data to eMSC Server when upgrading response to eMSC Server home position, and in user data or position upgrade and in response, to insert ICS indication, this indication be used for illustrating this user contracted ICS business, this user is ICS user.
Step 304, eMSC Server returns to adhere to UE and receives response, shows that UE adheres to successfully at eMSC Server.
Above-mentioned steps 301～304 is position update flow; Step 305 to step 316 is IMS register flow path.
Step 305, UE is after eMSC Server adheres to successfully, eMSC Server carries out this user's IMS registration decision-making: if in user data or position is upgraded in response, contain ICS indication, when this user is ICS user, eMSC Server determines to replace this ICS user to initiate IMS registration.
Step 306, eMSC Server judges this ICS user's ownership place according to this ICS user's sign IMSI code, and determines the address that its IMS entry address is I-CSCF.
Step 307, eMSC Server sends SIP registration request according to definite I-CSCF address to I-CSCF, the privately owned sign and the public identify that in this request, comprise this user who determines according to user ID IMSI code, and the access way that comprises this user indication, if the access way of this ICS user in this flow process is CS access, this access way indication can represent that SIP registration request is from eMSC Server.
Step 308, I-CSCF sends S-CSCF to HSS and distributes request, and request HSS is user assignment S-CSCF.
Step 309, after HSS is user assignment S-CSCF, sends S-CSCF assignment response to I-CSCF, and be expressed as user assignment S-CSCF and complete, and the S-CSCF information that comprises distribution.
Step 310, I-CSCF is forwarded to SIP registration request according to S-CSCF assignment response the S-CSCF of appointment.
Step 311, S-CSCF indicates by the access way in SIP registration request, while judging this registration request from eMSC Server, skips user's identifying procedure, directly to HSS, sends user data download request, the subscription data of request download user.
Step 312, HSS returns to user data to S-CSCF and downloads response, and this respond packet is containing user's subscription data.
Step 313, S-CSCF returns to the SIP response of succeeding in registration to I-CSCF, and S-CSCF has set up register binding, i.e. this user's public identify and the corresponding relation of eMSC Server address simultaneously.
Step 314, I-CSCF forwards the SIP response of succeeding in registration to eMSC Server.
Step 315, S-CSCF, according to the initial filter standard or norm of user's subscription data, triggers the third party logon procedure, sends third-party registration request, and by this request, to AS, send this user's third-party registration information to AS.
Step 316, AS returns to third-party registration success response to S-CSCF.
So far, eMSC Server replaces UE to complete IMS registration.
Flow process shown in above-mentioned Fig. 3 is only applicable to eMSC Server, but the scene that likely has common MSC Server and eMSC Server and deposit in core net, when ICS user has selected a common MSCServer to adhere to, because common MSC Server does not possess ICS ability, cause follow-up IMS registration failure, can not use ICS business.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of system of selection and system that strengthens Mobile Switching Center Server, can avoid, because ICS user is attached to common MSC Server, causing follow-up IMS registration failure, can not use the problem of ICS business.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of system of selection that strengthens Mobile Switching Center Server, the method comprises:
The attachment position update request that intermediate network node Inter Node sends according to UE, while judging active user as network interconnection protocol multi-media sub-system centralized traffic ICS user, selective enhancement Mobile Switching Center Server eMSC Server; And send attachment position update request to described eMSC Server, initiate UE adhering to described eMSC Server.
Wherein, described UE sends attachment position update request to Inter Node, is specially:
Described UE sends attachment position update request by radio network controller/base station controller RNC/BSC to Inter Node.
Described Inter Node judges that active user, as ICS user, is specially:
When Inter Node judges the ICS indication of self having stored active user according to the international mobile subscriber identity IMSI in described attachment position update request, according to described ICS indication or according to the User Identity section in described IMSI, judge that active user is as ICS user;
When Inter Node judges the ICS indication of self not storing active user according to described IMSI, home subscriber server/home location register HLR/HSS to active user obtains described ICS indication, and according to described ICS indication or according to the User Identity section in described IMSI, judge that active user is as ICS user.
The ICS indication that described Inter Node obtains active user to HLR/HSS, is specially:
Described Inter Node sends the position updating request of carrying IMSI to HLR/HSS;
Described HLR/HSS obtains the active user's who self stores ICS indication according to IMSI, and sends to described Inter Node by inserting user data requests.
The method further comprises:
Described Inter Node successfully stores after described ICS indication, sends insertion user data reply to HLR/HSS;
Described HLR/HSS is according to after inserting user data and replying and upgrade and reply to Inter Node home position, and described Inter Node judges that active user is as ICS user.
Described Inter Node selects eMSC Server, is specially:
Inter Node selects described eMSC Server as required from MSC Server pond.
After described Inter Node selects eMSC Server, the method further comprises: ICS customer location district information LAI corresponding to described Inter Node storage eMSC Server;
Accordingly, described Inter Node sends attachment position update request to eMSC Server, is specially:
Described Inter Node buffer memory during attachment position update request, directly described attachment position update request is sent to described eMSC Server according to ICS LAI;
When described Inter Node does not have buffer memory attachment position update request, by described RNC/BSC notice UE again launch position, upgrade; Described UE resends attachment position update request by described RNC/BSC to Inter Node; Inter Node sends to described eMSC Server by the attachment position update request resending according to ICS LAI.
Described Inter Node by RNC/BSC notify UE again launch position upgrade, be specially:
Described Inter Node generates position and upgrades refuse information, and the Reason For Denial of this message is set to " launch position renewal again ", and by RNC/BSC, described refusal location update message is sent to UE, to notify UE launch position renewal again;
Or, described Inter Node generates position update response information, the Location AreaIdentification field of this message is extended this as to the ICS LAI that described eMSC Server is corresponding, and by described RNC/BSC, described position update response information is sent to UE, to notify UE launch position renewal again.
The present invention also provides a kind of selective system that strengthens Mobile Switching Center Server, and this system comprises: UE, Inter Node and eMSC Server, wherein,
Described UE, for sending attachment position update request to described Inter Node;
Described Inter Node, when judging active user as ICS user according to attachment position update request, selects described eMSC Server; And send attachment position update request to described eMSC Server, initiate UE adhering to described eMSC Server;
Described eMSC Server, for receiving described attachment position update request.
This system further comprises: RNC/BSC and HLR/HSS,
Described RNC/BSC, is transmitted to described InterNode for the attachment position update request that described UE is sent;
Described HLR/HSS, for described Inter Node according to attachment position update request judge self do not store ICS indication as judges that active user is ICS user according to time, to described Inter Node, provide ICS to indicate.
The present invention selects the scheme of eMSC Server, at UE, carry out before MSC Server adheres to, InterNode judges that according to IMSI user is as ICS user, and selection has the eMSC Server of ICS function, and then the attachment position update request that UE is sent sends to this eMSC Server, initiation UE adhering to eMSCServer; So can make ICS user under common MSC Server and eMSC Server the scene of depositing, directly select eMSC Server to carry out IMS registration.
Accompanying drawing explanation
Fig. 1 is the application scenarios schematic diagram of ICS;
Fig. 2 is the configuration diagram of ICS;
Fig. 3 is the register flow path schematic diagram of ICS in prior art;
Fig. 4 is MSC Server pond schematic network structure in the present invention;
Fig. 5 is the system of selection schematic flow sheet that the present invention strengthens Mobile Switching Center Server;
Fig. 6 is the method flow schematic diagram that the present invention strengthens the selection embodiment mono-of Mobile Switching Center Server;
Fig. 7 is the method flow schematic diagram that the present invention strengthens the selection embodiment bis-of Mobile Switching Center Server;
Fig. 8 is the selective system structural relation schematic diagram that the present invention strengthens Mobile Switching Center Server.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
The present invention strengthens the applicable network configuration of the selection scheme of Mobile Switching Center Server as shown in Figure 4, comprising:
UE, this user is ICS user in the present invention;
Radio network controller (RNC, Radio Network Controller)/base station controller (BSC, Base Station Controller), is responsible for RRM, as the user identity of UE etc.;
Intermediate network node (Inter Node), RNC/BSC is connected to MSC Server pond (common MSC Server and eMSC Server coexist) by Inter Node, and Inter Node selects to have the eMSC Server of ICS function according to the user identity of UE from MSC Server pond;
HSS/HLR, for storing user data, comprises user's subscription data etc., and to it, provide user data when Inter Node needs.
The selection flow process that the present invention strengthens Mobile Switching Center Server as shown in Figure 5, comprising:
Step 501, the attachment position update request that Inter Node sends according to UE, while judging active user as ICS user, selects eMSC Server.
Step 502, Inter Node sends attachment position update request to eMSC Server, initiates UE adhering to eMSC Server.
Below in conjunction with concrete enforcement, the solution of the present invention is described, is illustrated in figure 6 the schematic flow sheet of the embodiment of the present invention one, comprising:
Step 601, UE sends attachment position update request to RNC/BSC.
User starts shooting first, to RNC/BSC, sends attachment position update request, and this user's user ID: IMSI has at least been carried in this request.
Step 602, RNC/BSC forwards attachment position update request to Inter Node.
RNC/BSC receives the attachment position update request of UE, directly this request is transmitted to Inter Node.
Step 603, Inter Node buffer memory attachment position update request, and judge the ICS indication that self whether contains this user, if not, enter step 604; If so, enter step 608.
Inter Node receives that after the attachment position update request of RNC/BSC forwarding, first buffer memory attachment position update request, then obtains IMSI; According to IMSI, judge the ICS indication of self whether having stored this user, if not, enter step 604; If so, enter step 608.
By IMSI, can be unique determine a user, if therefore store this user's ICS indication in the memory database of Inter Node self, according to IMSI, just can find corresponding ICS and indicate.Generally, ICS indication is present in this user's subscription data.
Wherein, to be mainly used in indicating this user be ICS user for ICS indication.
Step 604, Inter Node sends position updating request to HLR/HSS.
When Inter Node judges the ICS indication of self not storing active user, according to IMSI, determine this user's HLR/HSS, and send position updating request (carrying IMSI) to HLR/HSS, to obtain this user's ICS indication.Wherein, according to IMSI, determine that this user's ownership HLR/HSS is prior art, repeat no more herein.
Step 605, HLR/HSS sends and inserts user data requests to Inter Node.
HLR/HSS receives after the position updating request of Inter Node transmission, obtains IMSI, and according to IMSI, in the memory database of self, finds corresponding ICS indication.Because ICS indication is generally present in user's subscription data, preferably, HLR/HSS can send to Inter Node by inserting user data requests by the subscription data that carries ICS indication, certainly, HLR/HSS also can send to Inter Node by inserting user data requests separately by ICS indication.
Step 606, Inter Node returns to insertion user data to HLR/HSS and replys.
Inter Node stores the ICS indication of obtaining from insert user data requests, and after storing successfully, returns to insertion user data reply to HLR/HSS.
Step 607, HLR/HSS upgrades and replys to Inter Node home position.
HLR/HSS learns that Inter Node successfully obtains after user's ICS indication, upgrades and replys to Inter Node home position.
Step 608, when Inter Node judges active user as ICS user, selects eMSC Server.
Inter Node judges that the means that active user is ICS user have two kinds: the one, and, the ICS indication of storing according to self judges that this user is as ICS user; The one, according to the User Identity section of current UE, judge that this user is as ICS user, be specially: Inter Node self static configuration has User Identity section and ICS user's corresponding relation, User Identity section according to current UE can be mated in above-mentioned corresponding relation, just can learn whether this user is ICS user.Wherein, the User Identity section of UE is present in IMSI.
As can be seen here, when Inter Node self stores ICS when indication, can adopt as required any one in above-mentioned two kinds of means ICS identity to user to judge; When Inter Node self does not store ICS when indication, can first from HLR/HSS, obtain ICS indication, then adopt any one in above-mentioned two kinds of means ICS identity to user to judge.
Inter Node is when judging user as ICS user, need to for this UE, select have the eMSC Server of ICS function, be specially: Inter Node self disposes the attribute of each MSC Server in MSC Server pond, as common MSC Server and eMSC Server; Then Inter Node selects an eMSC Server from MSC Server pond, sends attachment position update request, to initiate UE adhering to this eMSCServer to it.If there are a plurality of eMSC Server in MSC Server pond simultaneously, Inter Node can select the eMSC Server that current Business Processing amount is less as required, certainly, also can have other selection mode as required.
When Inter Node has selected eMSC Server, can be by ICS customer location district information (LAI corresponding to this eMSC Server, Location Area Identification) store, for follow-up, when eMSCServer sends attachment position update request, use.Wherein, ICS LAI is the customer location district information of eMSCServer administration in MSC Server pond, in the local data base of static configuration each MSCServer in MSC Server pond, ICS LAI and eMSC Server are relations one to one, by ICSLAI, can be associated with a concrete eMSC Server.
Step 609, Inter Node sends attachment position update request to eMSC Server.
Preferably, Inter Node sends attachment position update request according to the ICS LAI of self storage to the eMSC Server selecting, and this attachment position update request is the attachment position update request of Inter Node buffer memory in step 603.
Step 610, carries out position update flow of the prior art and IMS register flow path.
When Inter Node has selected eMSC Server, carry out position update flow of the prior art and IMS register flow path, as shown in Figure 3, repeat no more herein.
The schematic flow sheet that Figure 7 shows that the embodiment of the present invention two, comprising:
Step 701, to 702 identical with the processing of above-mentioned steps 601 to 602, repeats no more herein.
Step 703, Inter Node judges the ICS indication that self whether contains this user, if not, enters step 704; If so, enter step 708.
Above-mentioned steps 603 is different, and in this step, Inter Node does not need the attachment position update request that buffer memory RNC/BSC forwards, and only need to obtain the IMSI in this request.
In addition, Inter Node judges that the mode of the ICS indication that self whether contains this user is identical with step 603, repeats no more herein.
Step 704, to 708 identical with the processing of above-mentioned steps 604 to 608, repeats no more herein.
Step 709, Inter Node by RNC/BSC notify UE again launch position upgrade.
When Inter Node is when to be that current I CS user is selected have the eMSC Server of ICS function, need to send attachment position update request to this eMSC Server, to initiate UE adhering to this eMSC Server.But, Inter Node self does not store the attachment position update request of UE, cannot initiate UE to the adhering to of eMSC Server, therefore, Inter Node need to by RNC/BSC notify UE again launch position upgrade, the attachment position update request sending to obtain UE.
Wherein, when Inter Node notifies UE launch position upgrades again by RNC/BSC, can adopt following means: the one,, Inter Node generates a position and upgrades refuse information, the Reason For Denial of this message is set to " launch position renewal again ", some values can be set in actual applications as required and represent this Reason For Denial, as long as UE can identify, then Inter Node upgrades refuse information by RNC/BSC by position and sends to UE, with notify UE again launch position upgrade; The one,, Inter Node generates a position update response information, ICS LAI corresponding to selected eMSC Server added to the Location Area Identification field of this message, and by RNC/BSC, this position update response information is sent to UE, to inform UE launch position renewal again.
Step 710～711, UE sends attachment position update request by RNC/BSC to Inter Node, and launch position upgrades again; Inter Node receives after attachment position update request, is transmitted to selected eMSC Server, initiates UE adhering to this eMSC Server.
When UE again launch position upgrades, Inter Node self has stored this user's ICS indication, or do not store this user's ICS indication, now Inter Node can directly find ICS indication according to the IMSI in attachment position update request, or the User Identity section in direct basis IMSI judges that user is as ICS user, then this attachment position update request is sent to selected eMSC Server.
When Inter Node sends to eMSC Server by the attachment position update request of again initiating, preferably, the ICS LAI that can store according to self is associated with selected eMSC Server.
Step 712, when Inter Node has selected eMSC Server, carries out position update flow of the prior art and IMS register flow path, as shown in Figure 3, repeats no more herein.
From above-described embodiment, can find out, at UE, carry out before MSC Server adheres to, Inter Node judges that according to IMSI user is as ICS user, and selection has the eMSC Server of ICS function, and then the attachment position update request that UE is sent sends to this eMSC Server, initiation UE adhering to eMSC Server; So just can avoid because UE is attached to common MSC Server, cause follow-up IMS registration failure, can not use the problem of ICS business.
In order to realize the method for above-mentioned selection eMSC Server, the present invention also provides the system of a kind of eMSCServer of selection, and as shown in Figure 8, system comprises: UE 10, Inter Node 20 and eMSC Server30, wherein,
This system can also comprise: RNC/BSC 40, for the attachment position update request that UE 10 is sent, is transmitted to Inter Node 20;
This system can also comprise: HLR/HSS 50, for Inter Node 20 according to attachment position update request judge self do not store ICS indication as judges that active user is ICS user according to time, to Inter Node 20, provide ICS to indicate.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (8)
1. strengthen a system of selection for Mobile Switching Center Server, it is characterized in that, the method comprises:
The attachment position update request that intermediate network node Inter Node sends according to user equipment (UE), while judging active user as network interconnection protocol multi-media sub-system centralized traffic ICS user, selective enhancement Mobile Switching Center Server eMSC Server; ICS customer location district information LAI corresponding to storage eMSC Server, and send attachment position update request to described eMSC Server, initiation UE adheres to described eMSC Server's, wherein,
Described Inter Node sends attachment position update request to eMSC Server, is specially:
Described Inter Node buffer memory during attachment position update request, directly described attachment position update request is sent to described eMSC Server according to ICS LAI;
When described Inter Node does not have buffer memory attachment position update request, by network controller/base station controller RNC/BSC notice UE again launch position, upgrade; Described UE resends attachment position update request by described RNC/BSC to Inter Node; Inter Node sends to described eMSC Server by the attachment position update request resending according to ICS LAI.
2. strengthen according to claim 1 the system of selection of Mobile Switching Center Server, it is characterized in that, described Inter Node judges that active user, as ICS user, is specially:
When Inter Node judges the ICS indication of self having stored active user according to the international mobile subscriber identity IMSI in described attachment position update request, according to described ICS indication or according to the User Identity section in described IMSI, judge that active user is as ICS user;
When Inter Node judges the ICS indication of self not storing active user according to described IMSI, home subscriber server/home location register HLR/HSS to active user obtains described ICS indication, and according to described ICS indication or according to the User Identity section in described IMSI, judge that active user is as ICS user.
3. strengthen according to claim 2 the system of selection of Mobile Switching Center Server, it is characterized in that, the ICS indication that described Inter Node obtains active user to HLR/HSS, is specially:
Described Inter Node sends the position updating request of carrying IMSI to HLR/HSS;
Described HLR/HSS obtains the active user's who self stores ICS indication according to IMSI, and sends to described Inter Node by inserting user data requests.
4. strengthen according to claim 3 the system of selection of Mobile Switching Center Server, it is characterized in that, the method further comprises:
Described Inter Node successfully stores after described ICS indication, sends insertion user data reply to HLR/HSS;
Described HLR/HSS is according to after inserting user data and replying and upgrade and reply to Inter Node home position, and described Inter Node judges that active user is as ICS user.
5. strengthen according to claim 1 the system of selection of Mobile Switching Center Server, it is characterized in that, described Inter Node selects eMSC Server, is specially:
Inter Node selects described eMSC Server as required from MSC Server pond.
6. strengthen according to claim 1 the system of selection of Mobile Switching Center Server, it is characterized in that, described Inter Node by RNC/BSC notify UE again launch position upgrade, be specially:
Described Inter Node generates position and upgrades refuse information, and the Reason For Denial of this message is set to " launch position renewal again ", and by RNC/BSC, described refusal location update message is sent to UE, to notify UE launch position renewal again;
Or, described Inter Node generates position update response information, the Location Area Identification field of this message is extended this as to the ICS LAI that described eMSC Server is corresponding, and by described RNC/BSC, described position update response information is sent to UE, to notify UE launch position renewal again.
7. a selective system that strengthens Mobile Switching Center Server, is characterized in that, this system comprises: UE, Inter Node, RNC/BSC and eMSC Server, wherein,
Described UE, for sending attachment position update request to described Inter Node;
Described Inter Node, when judging active user as ICS user according to attachment position update request, selects described eMSC Server; ICS customer location district information LAI corresponding to storage eMSC Server, and send attachment position update request to described eMSC Server, initiate UE adhering to described eMSC Server;
Described RNC/BSC, is transmitted to described Inter Node for the attachment position update request that described UE is sent;
Described eMSC Server, for receiving described attachment position update request, wherein,
Described Inter Node sends attachment position update request to eMSC Server, is specially:
Described Inter Node buffer memory during attachment position update request, directly described attachment position update request is sent to described eMSC Server according to ICS LAI;
When described Inter Node does not have buffer memory attachment position update request, by described RNC/BSC notice UE again launch position, upgrade; Described UE resends attachment position update request by described RNC/BSC to Inter Node; Inter Node sends to described eMSC Server by the attachment position update request resending according to ICS LAI.
8. strengthen according to claim 7 the selective system of Mobile Switching Center Server, it is characterized in that, this system further comprises:
HLR/HSS, for described Inter Node according to attachment position update request judge self do not store ICS indication as judges that active user is ICS user according to time, to described Inter Node, provide ICS to indicate.
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| CN106063332B (en) * | 2014-01-15 | 2019-11-19 | 诺基亚通信公司 | The method and apparatus realized for realizing the covering of centralized service network system |
| CN107612894B (en) * | 2017-09-05 | 2020-07-10 | 北京佰才邦技术有限公司 | Method, system and device for processing voice service |
| CN109996302A (en) * | 2018-01-02 | 2019-07-09 | 中国移动通信有限公司研究院 | A kind of selection method of SGsMSC, device and equipment |
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