CN101296518A - Circuit field service paging implementing method and apparatus - Google Patents
Circuit field service paging implementing method and apparatus Download PDFInfo
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- CN101296518A CN101296518A CNA2008101252377A CN200810125237A CN101296518A CN 101296518 A CN101296518 A CN 101296518A CN A2008101252377 A CNA2008101252377 A CN A2008101252377A CN 200810125237 A CN200810125237 A CN 200810125237A CN 101296518 A CN101296518 A CN 101296518A
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Abstract
The invention discloses a method and device for realizing circuit domain service paging, which comprise the steps that a position updating request message is received by a mobile switching center/a visitor location register through a global mobile communication system/a general mobile communication system, i.e. GERAN/UTRAN; the existence of SGs association to a mobile management entity is judged, and then the SGs association is kept continuously; paging is carried out by an IU-CS/A interface and an SGs interface respectively when paging is carried out by the mobile switching center/the visitor location register. By the technical proposal, the UE can always be paged by MSC/VLR.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of circuit field service paging implementation method and device.
Background technology
At present, third generation partner program (3rd Generation Partnership Project, abbreviate 3GPP as) the standardization effort group just be devoted to research to packet switched core network (Packet Switched Core, abbreviate PS Core as) and global system for mobile communications wireless access network (Universal Mobile Telecommunication System Radio AccessNetwork, abbreviate UTRAN as) evolution, purpose is to make that the PS Core (abbreviating EPC as) of evolution can provide higher transmission rate, shorter transmission delay, and UTRAN (the Evolved UTRAN of support evolution, abbreviate E-UTRAN as), global system for mobile communications enhanced data rates global system for mobile communications evolution technology wireless access network (Global System for Mobile communications Enhanced Data Rate forGSM Evolution radio access network, abbreviate GERAN as), UTRAN, mobile management between the access network of WLAN (wireless local area network) (Wireless Local Area Network abbreviates WLAN as) and other non-3GPP.The mobile communication system of this evolution just is called as the grouping domain system (Evolved Packet System abbreviates EPS as) of evolution.Fig. 1 is the framework map of said system, wherein, only shows the part entity relevant with the present invention.Each entity declaration is as follows among Fig. 1:
Travelling carriage or be called portable terminal, (Mobile Station abbreviates MS as)/subscriber equipment (User Equipment abbreviates UE as) 101 has the terminal that can insert two kinds of wireless network abilities and is called dual-mode terminal.In follow-up explanation, UE is the dual-mode terminal that can be linked into UMTS/GSM and EPS network, and the unified UE of use of MS/UE represents.
E-UTRAN 102, and the wireless access network of evolution can provide higher up-downgoing speed, lower transmission delay and reliable more wireless transmission.The network element that comprises among the E-UTRAN is the node (Evolved NodeB abbreviates eNodeB as) of evolution, for the access of terminal provides Radio Resource.
Gateway (Serving Gateway abbreviates S-GW as) and packet data network gateway (Packet Data Network Gateway abbreviates PDN GW or P-GW as) 103, gateway is a user entity, is responsible for the user face data route and handles.Packet data network gateway is responsible for the gateway function of UE accessing group data net (Packet Data Network abbreviates PDN as).PGW and SGW can be located in the physical entity, as shown in Figure 1, and also can be respectively in different physical entities.
Mobility Management Entity (Mobilty Management Entity, be called for short MME) 104, it is a chain of command entity, the server of interim storaging user data, (for example be in charge of and store the UE context, UE/ user ID, mobility management states, user security parameters etc.), for the user distributes temporary mark, be to be responsible for this user is carried out authentication when UE quarters at this tracing area or this network.
Internet protocol (Internet Protocol, abbreviate IP as) IP multimedia subsystem, IMS (IPMultimedia Core Network Subsystem, abbreviate IMS as) be a kind of IP-based network framework that proposes by 3GPP, it has made up an opening and service environment flexibly, support multimedia application, and provide abundant multimedia service for the user.IMS is based on the communication network framework of IP, irrelevant with access technology, except being EPS, GPRS (General Packet Radio Service, abbreviate GPRS as), WLAN (wireless local area network) (Wireless Local Area Network, abbreviate WLAN as) etc. packet access network provide outside the business, also can provide professional for GSM, universal mobile telecommunications system mobile cellular networks such as (Universal MobileTelecommunications System abbreviate UMTS as).
GERAN/UTRAN 105, the wireless access network of traditional GSM/UMTS network.
(the Mobile Switching Center of mobile switching centre, abbreviate MSC as)/VLR Visitor Location Register (Visitor Location Register, abbreviate VLR as) 106, this MSC/VLR also can be at the new functional entity MSC Server of R4 after the stage, and unification is in the present invention represented with MSC/VLR.
Gateway MSC (Gateway Mobile Switching Center abbreviates GMSC as) 107.
GPRS serving GPRS support node (Serving GPRS Support Node, abbreviate SGSN as) 108, it is the control network element of GPRS network, main effect is the positional information of record UE, and between UE and GGSN (Gateway GPRS SupportingNode abbreviates GGSN as), finish the transmission and the reception of mobile packet data.
As UE during in the GSM/UMTS network insertion, user's basic speech business and be by circuit (Circuit Switched based on the supplementary service of speech business, abbreviating CS as) territory provides, MSC/VLR among Fig. 1, GMSC belong to the CS domain network element, the user by the CS territory can with Home Network in or the user of other network (for example, fixed-line telephone network, other mobile network) carry out business such as audio call.User's IP operation provides by grouping (PacketSwitch abbreviates PS as) territory.SGSN belongs to the PS domain network element among Fig. 1.The user visits Packet Data Network by the PS territory, and the IP network that operator provides among Fig. 1 is exactly a Packet Data Network.
At the GSM/UMTS network, UE can carry out CS and PS renewal respectively and adhere to, and is linked into CS and PS territory respectively.Upgrade when adhering to when UE carries out CS and PS respectively, UE sends the position to GERAN/UTRAN respectively and upgrades (Location Area Update abbreviates LAU as) and Routing Area Update (Routing Area Update abbreviates RAU as) request message.GERAN/UTRAN receives the LAU request message, by the A/IU-CS interface LAU request message is sent to MSC/VLR, and MSC/VLR receives the LAU request message, carries out the renewal attaching process in CS territory.GERAN/UTRAN receives the RAU request message, by the Gb/IU-PS interface RAU request message is sent to SGSN, and SGSN receives the RAU request message, carries out the renewal attaching process in PS territory.The mode that CS territory and PS territory are upgraded respectively need take Radio Resource respectively and carry out the signaling exchange.
Take in order to save mobile management signaling consumption and Radio Resource, in GPRS, introduce Gs interface between MSC/VLR and the SGSN.MSC/VLR was by the UE of PS territory paging to the called subscriber after Gs interface was finished and set up Gs incidence relation (that is, preserve VLR number at SGSN, preserve the SGSN number at VLR) and setting up the Gs incidence relation between MSC/VLR and SGSN.
The Gs incidence relation is more newly-established by the joint route area/location.The joint route area/location upgrades, when the UE that supports to be attached to simultaneously UMTS/GSM network C S and PS territory exactly carries out Routing Area Update in the PS territory, UE carries a sign in Routing Area Update message, SGSN is when carrying out Routing Area Update, if judge the network support Gs interface, SGSN just sends location update message to MSC/VLR and triggers the CS position updating process, so just in the Routing Area Update process of PS territory, comprised a CS location area updating process, upgrade end at the joint route area/location, just set up the Gs incidence relation between SGSN and the VLR.
When MSC/VLR when the A/IU-CS interface receives the location area updating request message, Gs incidence relation information is preserved the location area information in CS territory with deleted among the MSC/VLR.
When UE after UMTS/GSM network C S territory and PS territory have been adhered to and have been set up the Gs incidence relation, MSC/VLR realizes the paging of CS business by SGSN.For example, the user under the UE as the called subscriber by the customer call of present networks or other network, when carrying out exhaling end, MSC/VLR by Gs interface to SGSN transmission CS paging request message.SGSN receives the CS paging request message, initiates the CS paging, and the CS service paging is delivered to UE.UE receives the beep-page message of CS business, inserts from UMTS/GSM network C S territory, sends a CS page-response message by GERAN/UTRAN to MSC/VLR.After receiving the CS page-response message, just begin to carry out call establishment between MSC/VLR and the UE.After call setup was finished, the user that the user under the UE just can begin and make a call conversed.
Need to prove whether UE supports associating RAU and LAU to upgrade is optionally, supports the different of CS territory and PS territory ability to work that UE is divided into A, B, C three Terminal Types simultaneously according to UE, have only category-A and the support of category-B terminal associating RAU/LAU to upgrade.And, whether SGSN and MSC/VLR support that Gs interface is optional, some MSC/VLR and SGSN product are not supported Gs interface, so CS territory and PS territory are arranged in some UMTS/GSM network in real network simultaneously, but do not dispose Gs interface, CS territory and PS territory are upgraded respectively and are adhered to, and the CS service paging is undertaken by the IU-CS/A interface.
In the UMTS/GSM network, when MSC/VLR carried out exhaling end, if judge that UE is carrying out business at the IU-CS/A interface, MSC/VLR did not need paging UE, and directly the signaling connection that exists by the IU-CS/A interface is carried out with UE alternately.Otherwise under the situation that has the Gs association, MSC/VLR carries out the paging of CS business by Gs interface.
As UE during in the EPS network insertion, user's basic speech business and based on the supplementary service of speech business by IMS control, EPS system itself can not provide and control voice call service, and the carrying of IP data can only be provided.But when the EPS network design, some operator only disposes the EPS network in the key area that the UMTS/GSM network has covered, be used for providing IP data service at a high speed for the user, do not dispose IMS, under this kind scene, wish that voice call service can and can only provide by the CS territory of the UMTS/GSM network that covered comprehensively, like this, when UE inserted the EPS network, the user just can't carry out CS business such as audio call, short message.In order to realize the CS business under this network design scene, 3GPP has set up circuit domain dropping (CS fallback abbreviates CSFB as) problem and has researched and solved scheme.
Existing C SFB solution is specially: introduce the SGs interface between MME and MSC/VLR, SGs develops based on Gs interface.When the UE start inserts the EPS network, set up SGs incidence relation (in MME, preserve MSC/VLR number or address information, in MSC/VLR, preserve MME number or address information) between MME and the MSC/VLR.Follow-up, when UE was mobile in the EPS network, the latest position information of UE can be updated to MME, if lane place or MME change, the information of preserving among the MSC/VLR also can upgrade in time.
When MSC/VLR when the A/IU-CS interface receives the location area updating request message, SGs incidence relation information is preserved the location area information in CS territory with deleted among the MSC/VLR.
Carrying out the professional as voice of CS when exhaling end, if called subscriber's UE is in the EPS network insertion, MSC/VLR receives calling, send out the CS beep-page message by the SGs interface to MME, after MME receives the CS beep-page message, by EUTRAN the CS paging is sent to UE, paging just begins to carry out the call circuit domain dropping behind UE.UE inserts from UMTS/GSM CS territory behind the circuit domain dropping, sends the CS message that pages reply to MSC/VLR, and MSC/VLR receives beginning call setup and communication process after the response message.
Under the situation of not introducing ISR, when carrying out the CS business, MSC/VLR always can arrive UE by SGs, Gs or the paging of IU-CS/A information of preserving among the VLR.Introduce saving signaling (Idle-mode Signaling Reduction under the idle pulley, abbreviate ISR as) after, support the SGs interface to support the CSFB function at MSC/VLR and MME, and do not support Gs interface between SGSN and the MSC/VLR, under the situation that ISR activates, UE is carrying out can't paging arriving UE when CS is professional under scene shown in Figure 2 according to prior art MSC/VLR when the EPS network insertion.Introduce the problem of ISR related notion and explanation existence below in conjunction with Fig. 2.
ISR be a kind of be used for limiting UE at idle pulley because carry out the mechanism of the signaling that the sub-district gravity treatment brings between the wireless access technology.When UE is in idle pulley in the two overlay areas of UMTS/GSM network and EPS network, because reasons such as mobile or wireless signal strength changes may frequently be switched between UMTS/GSM and EPS access way, thereby because need constantly carry out Routing Area Update (UE upgrades the process of position at the UMTS/GSM network PS field) and tracing section updating (Tracking Area Update, abbreviate TAU as, UE upgrades the process of position at the EPS network) bring a large amount of Signalling exchanges.In order to reduce the signaling traffic load that above-mentioned signalling interactive process brings to network, the main thought of ISR solution is exactly when UE and network are all supported the ISR function among the 3GPP, SGSN and MME preserve user context information, also be kept at the log-on message of two networks among the UE, like this, when switching, follow-up UE just do not carry out TAU and RAU process between network, that is to say, it is follow-up when UE is mobile between UMTS/GSM and EPS network, if the route district of UE (positional information of UMTS/GSM network PS field UE) and tracking area tabulation (positional information of EPS network UE) was registered, UE just can not initiate Routing Area Update and tracing section updating, and the current EPS of being in network still is the UMTS/GSM network thereby network is not known UE.
ISR activates and supports under the situation of ISR function that at UE and network be kept at the log-on message and the ISR activation marker of EPS and two networks of UMTS/GSM PS among the UE, MME and SGSN preserve user's the information and the situation of ISR activation marker simultaneously exactly.ISR does not activate, and only is recorded in the access registration information of EPS or UMTS/GSM PS exactly in UE, has only MME or SGSN to keep the situation of user profile down.
The schematic diagram of the problem that Fig. 2 exists when carrying out the CS service paging for MSC/VLR.Under scene shown in Figure 2, between MSC/VLR and MME, support the SGs interface, do not support Gs interface between SGSN and the MSC/VLR, UE and network support ISR, ISR activates.
In the first step shown in Figure 2, UE carries out CSFB and adheres to (attach) or associating TAU/LAU process in the EPS network insertion.It is that UE carries the CSFB indication information in issuing the Attach Request message of EPS that CSFB adheres to, after MME receives Attach Request message, carry out the attachment flow of EPS network, MME sends location update request message to MSC/VLR and finishes the renewal process of UE in the CS territory simultaneously.In this process, tracking area identification (the Tracking Area Identity that MME is current according to the user, abbreviate TAI as) etc. information generate the tracking area tabulation and the tracking area tabulation brought UE adhering to receive in the message, after UE receives and adheres to reception message, preserve the tracking area tabulation and the sign that UE has upgraded in the EPS network is set.After the CSFB attaching process was finished, UE registered at EPS network and UMTS/GSM CS territory, preserved MME information among the VLR, preserved MSC/VLR information among the MME, and it is related to set up SGs between MSC/VLR and the MME.Associating TAU/RAU process and said process are similar, just do not elaborate at this.
In second step shown in Figure 2, when UE when the EPS network moves to the UMTS/GSM network coverage, because reasons such as signal quality, UE carries out the sub-district gravity treatment from the UMTS/GSM network insertion, because SGSN does not support Gs interface, can not carry out associated update, UE carries out PS and CS renewal respectively and adheres to, and is linked into PS and CS territory respectively.As shown in Figure 2, SGSN receives RAU message from the IU-PS/Gb interface, and MSC/VLR receives LAU message from the IU-CS/A interface.When carrying out RAU, because SGSN, MME and UE support the ISR function, ISR activates, MME continues to preserve data such as user's context, SGSN accepts to carry in the message ISR active information at Routing Area Update and gives UE, and UE receives this message identifier UE and registers at EPS network and UMTS/GSM network PS field, after Routing Area Update is finished, ISR activates, and UE registers at UMTS/GSM network PS field and EPS network.When MSC/VLR receives LAU message from the IU-CS/A interface,, the SGs associated deletion only can be preserved this position and is upgraded entrained positional information among the MSC/VLR according to prior art.
Follow-up, when UE when the UMTS/GSM network moves to the EPS network, as long as the tracking area at the current place of UE is in the tracking area tabulation scope of having registered, UE can not initiate the TAU process, never has SGs incidence relation information like this among the MSC/VLR.In the time of in UE is in the tracking area tabulation scope of having registered in the first step shown in Figure 2, if it is the called subscriber that the user under the UE has a calling and this user, when MSC/VLR need carry out paging, because among the MSC/VLR not and the SGs related information between the MME of UE place, so MSC/VLR only can be by the IU-CS/A interface at UMTS/GSM ICQ UE, and can in the EPS network, not initiate the CS paging by the SGs interface, but, because UE is only in the EPS network insertion this moment, can't paging arrive in UMTS/GSM network C S territory, so MSC/VLR can't paging arrive UE, that is to say that the user under the UE can't receive CS in this case and call out.The technical scheme that addresses the above problem is not arranged at present as yet.
Summary of the invention
Consider under the situation that ISR activates, support between mobile switching center and the mobile management entity SGs interface, and the GPRS serving GPRS support node between when not supporting Gs interface, can't carry out the problem of circuit field service paging and make the present invention subscriber equipment, for this reason, main purpose of the present invention is to provide a kind of circuit field service paging implementation method and device, to solve the problems referred to above in the correlation technique.
According to an aspect of the present invention, provide a kind of circuit field service paging implementation method, be used under the situation that ISR activates, mobile switching center is carried out paging to subscriber equipment.
Comprise according to embodiment of the invention circuit field service paging implementation method: mobile switching center is that GERAN/UTRAN receives location update request message by the global mobile communication system/general mobile communication system, judge the SGs association that has mobile management entity, then continue to preserve described SGs association; When mobile switching center is carried out the CS service paging, carry out paging respectively by IU-CS/A interface and SGs interface.
Preferably, MSC/VLR judges and to exist the method for SGs association to be: MSC/VLR and MME set up SGs when related, use to increase the flag information mode newly to distinguish related with Gs of SGs association, follow-uply distinguish according to this flag information; Difference according to address information representation mode is distinguished; Difference according to interface protocol is distinguished; It perhaps is the combination of above-mentioned differentiation information.
Preferably, continue to preserve the related and IU-CS/A interface relevant information of SGs concrete mode can for: be set to current effective simultaneously with IU-CS/A interface relevant information with SGs is related, perhaps, the SGs association is set to historical context information, and IU-CS/A interface relevant information is set to current effective.
Preferably, mobile switching center can be carried out paging respectively by IU-CS/A interface and SGs interface by following arbitrary mode: carry out paging by IU-CS/A interface and SGs interface simultaneously; At first carry out paging, under the situation of paging failure, carry out paging by the SGs interface by the IU-CS/A interface; At first carry out paging, under the situation of paging failure, carry out paging by the IU-CS/A interface by the SGs interface.
In addition, further comprise: when mobile management entity or location information of terminals change, the SGs association that the position updating request information updating that mobile switching center sends according to the mobile management entity that receives is preserved, and the IU-CS/A interface relevant information of deletion preservation; When the IU-CS/A interface by UTRAN/GERAN receives location update request message once more, continue to preserve the SGs related information that upgrades in mobile switching center.
According to a further aspect in the invention, provide a kind of circuit field service paging implement device, be used under the situation that ISR activates, mobile switching center is carried out paging to portable terminal.
Circuit field service paging implement device according to the embodiment of the invention comprises: preserve module, be used for when the IU-CS/A interface by UTRAN/GERAN/ receives location update request message, the relevant information of the IU-CS/A interface that in preserving location update request message, carries, and continue to preserve the SGs association; The paging module is used for carrying out paging according to the IU-CS/A interface relevant information of preserving and the SGs related information of preservation respectively by IU-CS/A interface and SGs interface.
Preferably, preserve module and judge and exist the method for SGs association to be: MSC/VLR and MME set up SGs when related, use to increase the flag information mode newly to distinguish related with Gs of SGs association, follow-uply distinguish according to this flag information; Difference according to address information representation mode is distinguished; Difference according to interface protocol is distinguished; It perhaps is the combination of above-mentioned differentiation information.
Preferably, the mode that the SGs association is deposited in above-mentioned preservation module relaying continuation of insurance is specially: be set to SGs association and IU-CS/A interface relevant information current effective simultaneously, perhaps, the SGs association is set to historical context information, and IU-CS/A interface relevant information is set to current effective.
Preferably, above-mentioned paging module is carried out paging by following arbitrary mode by IU-CS/A interface and SGs interface: carry out paging by IU-CS/A interface and SGs interface simultaneously; At first carry out paging, under the situation of paging failure, carry out paging by the SGs interface by the IU-CS/A interface; At first carry out paging, under the situation of paging failure, carry out paging by the IU-CS/A interface by the SGs interface.
In addition, above-mentioned mobile switching center further comprises: update module, be used for when mobile management entity or location information of terminals change, the SGs related information that the position updating request information updating that sends according to the mobile management entity that receives is preserved, and the relevant information of the IU-CS/A interface preserved of deletion; Preserve module, also be used for when the IU-CS/A interface by UTRAN/GERAN receives location update request message once more, continuing to preserve the SGs related information that upgrades.
Preferably, install and be mobile switching center.
In sum, by means of technical scheme of the present invention, can satisfy in all cases MSC/VLR and can both correctly carry out paging and paging, deposit, help the application of EPS network thereby make CSFB and ISR function under the diverse network deployment scenario, to close to UE.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the framework schematic diagram of the grouping domain system of evolution in the prior art;
Fig. 2 is the scene schematic diagram that MSC/VLR carries out paging when supporting the SGs interface in the prior art and not supporting Gs interface under the situation that network ISR activates;
Fig. 3 is the flow chart according to the circuit field service paging implementation method of the embodiment of the invention;
Fig. 4 is that embodiment of the invention first step in scene shown in Figure 2 is handled and the schematic diagram of the information of preservation;
Fig. 5 handles and the schematic diagram of the information of preservation in the embodiment of the invention second step in scene shown in Figure 2;
Fig. 6 is the embodiment of the invention a kind of schematic diagram of situation during paging in scene shown in Figure 2;
Fig. 7 is embodiment of the invention schematic diagram of another kind of situation during paging in scene shown in Figure 2;
Fig. 8 is the block diagram according to the circuit field service paging processing unit of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Method embodiment
From top description as can be seen, if realize that MSC/VLR always can normally carry out the paging of CS business, MSC/VLR need preserve the SGs incidence relation always when ISR activates.But, because there is not Gs interface between MSC/VLR and the SGSN, under situation shown in Figure 2, when UE when UMTS/GSM inserts ISR and activates, SGSN can't be delivered to MSC/VLR with the information that ISR activates.And, UE knows that just ISR activates when the ISR active information that the Routing Area Update that receives the SGSN transmission is accepted to carry in the message, and this moment, the LAU process may finish, and can't guarantee that the information that whether UE always can activate ISR exactly in LAU message is carried to MSC/VLR.Therefore, under scene shown in Figure 2, no matter whether ISR activates, and MSC/VLR need preserve the SGs incidence relation.The present invention realizes by revising the processing when the IU-CS/A interface receives LAU message and carry out paging of MSC/VLR in the prior art.
Below, above-mentioned processing procedure is elaborated.
In the present embodiment, provide a kind of circuit field service paging implementation method, be used under the situation that ISR activates, mobile switching center is carried out circuit field service paging to subscriber equipment.Fig. 3 is the flow chart according to the circuit field service paging implementation method of the embodiment of the invention.As shown in Figure 3, comprise the steps:
Step S302, mobile switching center is that GERAN1UTRAN receives location update request message by the global mobile communication system/general mobile communication system, judge the SGs association that has mobile management entity, then continue to preserve described SGs association;
When step S302 implemented, MSC/VLR received the processing of location update request message from the IU-CS/A interface of GERAN/UTRAN, only revised the processing to the SGs association, preserved if having the SGs association then continue; Processing and prior art to the Gs association are consistent, and receive LAU message from the IU-CS/A interface and just delete the Gs association.Therefore, what MSC/VLR need be known wherein preservation is Gs association related to the SGs of MME rather than that arrive SGSN, that is to say that it is related related with Gs that MSC/VLR need distinguish SGs.The method of implement distinguishing (or judging the method that has the SGs association) can be set up SGs when related for: (one) MSC/VLR and MME, use newly-increased flag information mode to related distinguish related with Gs of SGs, follow-up to distinguish SGs according to this flag information related with Gs; (2) it is related with Gs to distinguish SGs according to the difference of address information representation mode; (3) distinguish according to the difference of interface protocol; It perhaps is the combination of above-mentioned differentiating method.
When step S302 implemented, when whether MSC/VLR needed to keep the SGs association in decision, a variety of judgment criterion can be arranged: (1) was that the SGs association then keeps.(2) be the SGs association, and the SGSN that satisfies the current access of UE does not support Gs interface (obtaining by the mode that disposes) in MSC/VLR, and UE just supports the mobile phone of circuit domain dropping not to be or current not being operated under some condition combination of supporting Gs interface just keeps the SGs association.
When step S302 implements, MSC/VLR preserves the IU-CS/A interface relevant information of carrying in the location update request message, and the mode that continues preservation SGs association is specifically as follows: all be set to SGs association and IU-CS/A interface relevant information current effective, perhaps, the SGs association is set to historical context information, and IU-CS/A interface relevant information is set to current effective.
Step S304 when mobile switching center is carried out the CS service paging, carries out paging respectively by IU-CS/A interface and SGs interface.
Preferably, in step S304, MSC/VLR is according to IU-CS/A interface relevant information and the SGs related information wherein preserved, and carry out paging according to following arbitrary mode by IU-CS/A interface and SGs interface: mobile switching center is carried out paging by IU-CS/A interface and SGs interface simultaneously; Mobile switching center is at first carried out paging by the IU-CS/A interface, under the situation of paging failure, carries out paging by the SGs interface; Mobile switching center is at first carried out paging by the SGs interface, under the situation of paging failure, carries out paging by the IU-CS/A interface.
In addition, after step S304, can further include: when mobile management entity or location information of terminals change, the SGs association that the position updating request information updating that mobile switching center sends according to the mobile management entity that receives is preserved, and delete the IU-CS/A interface relevant information of wherein preserving; Mobile switching center once more by GERAN/UTRAN receive location update request message the time, the SGs related information that continue to preserve upgrades.
Below, describe the present invention in detail in conjunction with Fig. 4, Fig. 5, Fig. 6 and Fig. 7 and be applied to the shown in Figure 2 scene handling process in following time.Fig. 4 shown the handling process when first step operation is carried out among Fig. 2 and finish after the information of preserving among the MSC/VLR.Fig. 5 shown the handling process when second step, operation was carried out among Fig. 2 and finish after the information of preserving among the MSC/VLR.Fig. 6 is the processing schematic diagram of MSC/VLR when the related and IU-CS/A interface message of SGs is arranged when carrying out the CS service paging simultaneously.Fig. 7 is the processing schematic diagram of MSC/VLR when having only the SGs related information when carrying out the CS service paging.
As shown in Figure 4, UE start is carried out CSFB and is adhered to or move to a new tracking area and unite TAU/LAU and upgrade, MSC/VLR receives LAU message by the SGs interface from MME, only remain with the SGs related information among the MSC/VLR, and to this SGs related information, MSC/VLR is provided with a flag information and this flag information is set is the SGs association, and it is related related with Gs to be used for distinguishing SGs.
As shown in Figure 5, UE moves to the UMTS/GSM network from the EPS network, and UE initiates the LAU process, and MSC/VLR receives the LAU request from the IU-CS/A interface, and what MSC/VLR judged wherein current preservation is the SGs association, then preserves the related and IU-CS/A relevant information of SGs.
After finishing second step shown in Figure 2,, do not move to the EPS network in the UMTS/GSM network, just preserve the related and IU-CS/A mouth relevant information of SGs so among the MSC/VLR always if UE inserts always.After finishing second step shown in Figure 2, if UE moves to the EPS network from the UMST/GSM network, the tracking area at the current place of UE is in the tracking area tabulation of having registered, because ISR activates, UE does not unite the TAU/LAU process, preserves the related and IU-CS/A interface relevant information of SGs so among the MSC/VLR.
In the above two kinds of cases, as shown in Figure 6, when MSC/VLR receives an audio call or short message, if the current signaling that exists is connected between MSC/VLR and the UE, MSC/VLR does not need paging UE, exists signaling to connect directly and UE carries out alternately by current on the IU-CS/A interface.If among the MSC/VLR UE current be Idle state, when needing paging UE, there is the related and IU-CS/A interface relevant information of SGs in the MSC/VLR judgement, MSC/VLR sends the CS paging by the SGs association to MME, notice MME initiates at the CS of EPS network paging, and paging is identical with prior art with follow-up processing flow; Simultaneously, MSC/VLR sends beep-page message by the IU-CS/A interface to GERAN/UTRAN, notice GERAN/UTRAN paging UE.After MME receives the CS paging, current under the situation of EPS network insertion at EPS ICQ UE at UE, can paging arrive UE.GERAN/UTRAN receives the paging request, and paging UE in the UMTS/GSM network is current under the situation of UMS/GSM network insertion at UE, can paging arrive UE.So under scene shown in Figure 2, MSC/VLR always can paging arrive UE.
After finishing second step shown in Figure 2, if UE moves to the EPS network from the UMST/GSM network, the tracking area at the current place of UE is not in the tracking area tabulation of having registered, UE can initiate the TAU process, if the lane place changes or MME changes, MME sends LAU message to MSC/VLR, MSC/VLR receives the LAU request that MME sends from the SGs interface, can upgrade the SGs link information, deletion IU-CS/A interface relevant information, as shown in Figure 7, when MSC/VLR when carrying out CS service needed paging UE, can be by the related notice of SGs MME at EPS ICQ UE.If UE moves to the UMTS/GSM network once more, even ISR activates, because CS territory and PS territory are to adhere to access respectively, UE always can initiate the LAU process, MSC/VLR can preserve the related and IU-CS/A interface relevant information of SGs again after receiving the LAU request from the IU-CS/A interface.Follow-up when UE is mobile in network, similar shown in flow process and top Fig. 4-7, no longer repeat.
Device embodiment
In the present embodiment, provide a kind of circuit field service paging implement device, be used under the situation that ISR activates, mobile switching center is carried out paging to portable terminal.Fig. 8 is the circuit field service paging implement device according to the embodiment of the invention.As shown in Figure 8, comprising:
Preserve module 80, be used for when the IU-CS/A interface by UTRAN/GERAN receives location update request message, preserve the relevant information of the IU-CS/A interface that carries in the location update request message, judge to exist the SGs association then to continue to preserve the SGs related information;
Preferably, preserve the module related related modes of distinguishing of 80 couples of SGs (there is the mode of SGs association in judgement) with Gs can for: (one) is when setting up the SGs association, use newly-increased flag information mode to related distinguish related of SGs, follow-uply distinguish according to this flag information with Gs; (2) distinguish according to the difference of address information representation mode; (3) distinguish according to the difference of interface protocol; It perhaps is the combination of above-mentioned differentiating method.
Preferably, the above-mentioned preservation module 80 relayings continuation of insurance mode of depositing the SGs association is specially: (one) related and IU-CS/A interface relevant information is set to current effective simultaneously with SGs; (2) the SGs association is set to historical context information, and IU-CS/A interface relevant information is set to current effective.
Paging module 82 is used for carrying out paging according to the IU-CS/A interface relevant information of preserving and the SGs association of preservation respectively by IU-CS/A interface and SGs interface.
Preferably, above-mentioned paging module 82 is carried out paging by following arbitrary mode respectively by IU-CS/A interface and SGs interface: the paging module is carried out paging by IU-CS/A interface and SGs interface simultaneously; The paging module is at first carried out paging by the IU-CS/A interface, under the situation of paging failure, carries out paging by the SGs interface; The paging module is at first carried out paging by the SGs interface, under the situation of paging failure, carries out paging by the IU-CS/A interface.
In addition, said apparatus further comprises:
Update module, be used for when mobile management entity or location information of terminals change, the SGs interface conjunctionn relation information that the position updating request information updating that sends according to the mobile management entity that receives is preserved, and the relevant information of the IU-CS/A interface preserved of deletion;
Preserve module 82, also be used for when the IU-CS/A interface by GERAN/UTRAN receives location update request message once more, continuing to preserve the SGs related information that upgrades.
Preferably, said apparatus is a mobile switching center.
In sum, by means of method of the present invention, after having solved introducing ISR function, when supporting during network design that the SGs interface is not still supported Gs interface, the possibility paging was less than the problem of UE when MSC/VLR carried out paging, satisfied in all cases MSC/VLR can both paging to UE, deposit thereby make CSFB and ISR function under the diverse network deployment scenario, to close, help the application of EPS network.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a circuit field service paging implementation method is used under the situation that ISR activates, and mobile switching center is carried out paging to subscriber equipment, it is characterized in that, described method comprises:
Mobile switching center is that GERAN/UTRAN receives location update request message by the global mobile communication system/general mobile communication system, judges the SGs association that has mobile management entity, then continues to preserve described SGs association;
When described mobile switching center is carried out paging, carry out paging respectively by described IU-CS/A interface and described SGs interface.
2. method according to claim 1 is characterized in that, described mobile switching center judgement exists the SGs association to be specially:
Described mobile switching center uses newly-increased flag information mode to related distinguish related with Gs of SGs setting up SGs when related, follow-uply distinguishes according to this flag information; Difference according to address information representation mode is distinguished; Difference according to interface protocol is distinguished; It perhaps is the combination of above-mentioned differentiation information.
3. method according to claim 1 is characterized in that, the mode that continues the described SGs association of preservation is specially:
Be set to described SGs association and described IU-CS/A interface relevant information current effective simultaneously; Perhaps, described SGs association is set to historical context information, and described IU-CS/A interface relevant information is set to current effective.
4. method according to claim 1 is characterized in that, described mobile switching center is carried out paging by following arbitrary mode respectively by described IU-CS/A interface and described SGs interface:
Carry out paging by described IU-CS/A interface and described SGs interface simultaneously;
At first carry out paging, under the situation of described paging failure, carry out paging by described SGs interface by described IU-CS/A interface;
At first carry out paging, under the situation of described paging failure, carry out paging by described IU-CS/A interface by described SGs interface.
5. according to each described method of claim 1 to 4, it is characterized in that, further comprise:
When described mobile management entity or described location information of terminals change, the described SGs association that the position updating request information updating that described mobile switching center sends according to the described mobile management entity that receives is preserved, and the described IU-CS/A interface relevant information of deletion preservation;
When the IU-CS/A interface by described UTRAN/GERAN receives location update request message once more, continue to preserve the described SGs related information that upgrades in described mobile switching center.
6. a circuit field service paging implement device is used under the situation that ISR activates, and mobile switching center is carried out circuit field service paging to portable terminal, it is characterized in that, described device comprises:
Preserve module, be used for when the IU-CS/A interface by UTRAN/GERAN receives location update request message, preserve the relevant information of the IU-CS/A interface that carries in the described location update request message, judge to have the SGs association, then continue to preserve described SGs association through sign;
The paging module is further used for carrying out paging according to the described IU-CS/A interface relevant information of preserving and the described SGs association of preservation respectively by described IU-CS/A interface and described SGs interface.
7. device according to claim 6 is characterized in that, described preservation module judgement exists the method for SGs association to be:
Setting up SGs when related, described preservation module uses newly-increased flag information mode to related distinguish related with Gs of SGs, follow-uply distinguishes according to this flag information; Difference according to address information representation mode is distinguished; Difference according to interface protocol is distinguished; It perhaps is the combination of above-mentioned differentiation information.
8. device according to claim 6, its special medical treatment are that the mode that described SGs association is deposited in described preservation module relaying continuation of insurance is specially:
Related and described IU-CS/A interface relevant information is set to simultaneously that current effectively perhaps, described SGs association is set to historical context information with described SGs, and described IU-CS/A interface relevant information is set to current effective.
9. device according to claim 6 is characterized in that, carries out paging by following arbitrary mode respectively by described IU-CS/A interface and described SGs interface in described paging module:
Described paging module is carried out paging by described IU-CS/A interface and described SGs interface simultaneously;
Described paging module is at first carried out paging by described IU-CS/A interface, under the situation of described paging failure, carries out paging by described SGs interface;
Described paging module is at first carried out paging by described SGs interface, under the situation of described paging failure, carries out paging by described IU-CS/A interface.
10. according to each described device of claim 6 to 9, it is characterized in that described mobile switching center further comprises:
Update module, be used for when described mobile management entity or described location information of terminals change, the described SGs related information that the position updating request information updating that sends according to the described mobile management entity that receives is preserved, and the relevant information of the described IU-CS/A interface preserved of deletion;
Described preservation module also is used for continuing to preserve the SGs related information of described renewal when the IU-CS/A interface by described UTRAN/GERAN receives location update request message once more.
11., it is characterized in that described device is a mobile switching center according to each described device of claim 6 to 9.
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