CN101296518B - Circuit field service paging implementing method and apparatus - Google Patents

Circuit field service paging implementing method and apparatus Download PDF

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Publication number
CN101296518B
CN101296518B CN2008101252377A CN200810125237A CN101296518B CN 101296518 B CN101296518 B CN 101296518B CN 2008101252377 A CN2008101252377 A CN 2008101252377A CN 200810125237 A CN200810125237 A CN 200810125237A CN 101296518 B CN101296518 B CN 101296518B
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described
interface
sgs
cs
paging
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CN2008101252377A
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CN101296518A (en
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胡英
宗在峰
朱进国
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中兴通讯股份有限公司
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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

Circuit field service paging implementing method and device

Technical field

The present invention relates to the communications field, and especially, relate to a kind of circuit field service paging implementing method and device.

Background technology

At present, third generation partner program (3rd Generation Partnership Project, referred to as 3GPP) the standardization effort group just be devoted to research to packet switched core network (Packet Switched Core, referred to as PS Core) and global system for mobile communications wireless access network (Universal Mobile Telecommunication System Radio AccessNetwork, referred to as UTRAN) evolution, purpose is so that the PS Core (referred to as EPC) of evolution can provide higher transmission rate, shorter transmission delay, and UTRAN (the Evolved UTRAN of support evolution, referred to as E-UTRAN), 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, referred to as GERAN), UTRAN, mobile management between the access network of WLAN (wireless local area network) (Wireless Local Area Network is referred to as WLAN) and other non-3GPP.The mobile communication system of this evolution just is called as the grouping domain system (Evolved Packet System is referred to as EPS) 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 is referred to as MS)/subscriber equipment (User Equipment is referred to as UE) 101 has the terminal that can access 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 more reliable wireless transmission.The network element that comprises among the E-UTRAN is the node (Evolved NodeB is referred to as eNodeB) of evolution, for the access of terminal provides Radio Resource.

Gateway (Serving Gateway, referred to as S-GW) and packet data network gateway (Packet Data Network Gateway, referred to as PDN GW or P-GW) 103, gateway is a user entity, is responsible for the user face data route processing.Packet data network gateway is responsible for the gateway function of UE accessing group data net (Packet Data Network is referred to as PDN).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 (Mobility Management Entity, be called for short MME) 104, it is a chain of command entity, the server of interim storage user data, (for example be in charge of and store the UE context, UE/ user ID, mobility management states, user security parameters etc.), be the user assignment 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, referred to as IP) IP multimedia subsystem, IMS (IPMultimedia Core Network Subsystem, referred to as IMS) be a kind of IP-based network architecture that is proposed 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, referred to as GPRS), WLAN (wireless local area network) (Wireless Local Area Network, referred to as WLAN) etc. packet access network provide outside the business, also can provide professional for mobile cellular networks such as GSM, universal mobile telecommunications system (Universal Mobile Telecommunications System is referred to as UMTS).

GERAN/UTRAN 105, the wireless access network of traditional GSM/UMTS network.

(the Mobile Switching Center of mobile switching centre, referred to as MSC)/VLR Visitor Location Register (Visitor Location Register, referred to as VLR) 106, this MSC/VLR also can be at the new functional entity MSC Server of R4 after the stage, and in the present invention unification represents with MSC/VLR.

Gateway MSC (Gateway Mobile Switching Center is referred to as GMSC) 107.

GPRS serving GPRS support node (Serving GPRS Support Node, referred to as SGSN) 108, it is the control network element of GPRS network, Main Function is the positional information of record UE, and between UE and GGSN (Gateway GPRS SupportingNode is referred to as GGSN), finish the sending and receiving 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, referred to as CS) 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 the business such as audio call.User's IP operation provides by grouping (PacketSwitch is referred to as PS) 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 Packet Data Network.

At the GSM/UMTS network, UE can carry out respectively CS and PS renewal and adhere to, and is linked into respectively CS and PS territory.Upgrade when adhering to when UE carries out respectively CS and PS, UE sends the position to GERAN/UTRAN respectively and upgrades (Location Area Update is referred to as LAU) and Routing Area Update (Routing Area Update is referred to as RAU) 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 to take respectively Radio Resource 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.Gs interface is finished and set up Gs incidence relation (that is, preserve VLR number at SGSN, preserve the SGSN number at VLR) between MSC/VLR and SGSN, and MSC/VLR arrives called subscriber's UE by the paging of PS territory after setting up the Gs incidence relation.

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 exactly to be attached to simultaneously UMTS/GSM network C S and PS territory 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 received the location area updating request message from the A/IU-CS interface, Gs incidence relation information was 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 is called out by the user of present networks or other network as the called subscriber, and when carrying out exhaling end, MSC/VLR sends the CS paging request message by Gs interface to SGSN.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, from the access of 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 optional, supports simultaneously the different of CS territory and PS territory ability to work that UE is divided into A, B, C three Terminal Types according to UE, only has 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 IU-CS/A interface (the IU-CS interface refers to the interface before MSC/VLR and the RNC, and the A interface refers to the interface before MSC/VLR and the BSC).

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 the signaling that directly exists by the IU-CS/A interface connects with UE carries out alternately.Otherwise in the situation that there is 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 access EPS network, it is professional that the user just can't carry out the CS such as audio call, short message.Professional in order to realize CS under this network design scene, 3GPP has set up circuit domain dropping (CS fallback is referred to as CSFB) problem and has researched and solved scheme.

Existing CSFB solution is specially: introducing SGs interface (the SGs interface refers to the interface between MME and the MSC/VLR) between MME and the MSC/VLR, SGs develops based on Gs interface.When UE start access EPS network, set up SGs association (the SGs association refers to the association between MME and the MSC/VLR) 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 moved 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 received the location area updating request message from the A/IU-CS interface, SGs incidence relation information was 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 is from UMTS/GSM CS territory access 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.

Do not introducing (the Idle-mode Signaling Reduction of saving signaling under the idle pulley, referred to as ISR) situation under, 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, referred to as ISR) 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, in 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 a kind ofly is used for limiting UE at idle pulley because carry out the mechanism of the signaling that cell reselection 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 the reasons such as mobile or wireless signal strength changes may frequently be switched between UMTS/GSM and EPS access way, thereby because need to 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, referred to as TAU, UE upgrades the process of position at the EPS network) bring a large amount of Signalling exchanges.The signaling traffic load that brings to network in order to reduce above-mentioned signalling interactive process, 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 moves between UMTS/GSM and EPS network, if the Route Area of UE (positional information of UMTS/GSM network PS field UE) and tracking area tabulation (positional information of EPS network UE) were registered, UE just can not initiate Routing Area Update and tracing section updating, thereby network is not known the current EPS of the being in network of UE or UMTS/GSM network.

It is exactly in the situation that UE and network are all supported the ISR function that ISR activates, and is kept at log-on message and the ISR activation marker of EPS and two networks of UMTS/GSM PS among the UE, and MME and SGSN preserve user's information and the situation of ISR activation marker simultaneously.ISR does not activate, and only is recorded in exactly the access registration information of EPS or UMTS/GSM PS in UE, only has the situation that keeps user profile under MME or the SGSN.

Fig. 2 is the schematic diagram of the problem that exists when carrying out the CS service paging of 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 UE in the renewal process in CS territory simultaneously.In this process, tracking area identification (the Tracking Area Identity that MME is current according to the user, referred to as TAI) etc. Information generation tracking area tabulation and in adhering to receipt message, the tracking area tabulation brought UE, after UE receives and adheres to receipt 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, set up SGs between MSC/VLR and the MME related.Associating TAU/RAU process and said process are similar, just do not elaborate at this.

In second step shown in Figure 2, as UE during from the EPS Network Mobility to the UMTS/GSM network coverage, because the reasons such as signal quality, UE carries out cell reselection from the UMTS/GSM network insertion, because SGSN does not support Gs interface, can not carry out associated update, UE carries out respectively PS and CS renewal and adheres to, and is linked into respectively PS and CS territory.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 the data such as user's context, SGSN accepts to carry in the message ISR active information to UE at Routing Area Update, 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, according to prior art, can with the SGs associated deletion, only preserve this position among the MSC/VLR and upgrade entrained positional information.

Follow-up, as UE during from the UMTS/GSM Network Mobility to the EPS network, as long as the tracking area at the current place of UE is in chartered tracking area tabulation scope, UE can not initiate the TAU process, never has like this SGs incidence relation information among the MSC/VLR.When UE is in the first step shown in Figure 2 in chartered tracking area tabulation scope, if it is the called subscriber that the user under the UE has a calling and this user, when MSC/VLR need to 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, the user under the UE can't receive in this case CS and call out.The technical scheme that addresses the above problem is not yet arranged at present.

Summary of the invention

Consider in the situation that ISR activates, support between mobile switching center/visitor location register 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 implementing 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 implementing method, be used in the situation that ISR activates, mobile switching center/visitor location register is carried out paging to subscriber equipment.

Comprise according to embodiment of the invention circuit field service paging implementing method: mobile switching center/visitor location register is that GERAN/UTRAN receives location update request message by the global mobile communication system/general mobile communication system, judge that the SGs that exists to mobile management entity is related, then continue to preserve described SGs related; When mobile switching center/visitor location register is carried out the CS service paging, carry out respectively paging 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; Show that according to the address information table difference of mode distinguishes; 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 simultaneously current effective 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/visitor location register can be carried out respectively paging 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 by the IU-CS/A interface, in the situation that paging failure carries out paging by the SGs interface; At first carry out paging by the SGs interface, in the situation that paging failure carries out paging by the IU-CS/A interface.

In addition, further comprise: when the positional information of mobile management entity or terminal changes, the SGs that the position updating request information updating that mobile switching center/visitor location register sends according to the mobile management entity that receives is preserved is related, and deletes the IU-CS/A interface relevant information of preserving; When the IU-CS/A interface by UTRAN/GERAN receives location update request message again, continue to preserve the SGs related information that upgrades in mobile switching center/visitor location register.

According to a further aspect in the invention, provide a kind of circuit field service paging implement device, be used in the situation that ISR activates, mobile switching center/visitor location register 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 it is related to continue to preserve SGs; The paging module is used for carrying out respectively paging according to the IU-CS/A interface relevant information of preserving and the SGs related information of preservation 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; Show that according to the address information table difference of mode distinguishes; 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 simultaneously 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.

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 by the IU-CS/A interface, in the situation that paging failure carries out paging by the SGs interface; At first carry out paging by the SGs interface, in the situation that paging failure carries out paging by the IU-CS/A interface.

In addition, above-mentioned mobile switching center/visitor location register further comprises: update module, be used for when the positional information of mobile management entity or terminal changes, 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 again, continuing to preserve the SGs related information that upgrades.

Preferably, install and be mobile switching center/visitor location register.

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 to UE, thereby so that CSFB and ISR function can be closed deposits, be conducive to the application of EPS network under the diverse network deployment scenario.

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 writing, claims and accompanying drawing.

Description of drawings

Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, 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 in the prior art in the situation that network ISR activates the scene schematic diagram that MSC/VLR carries out paging when supporting the SGs interface and not supporting Gs interface;

Fig. 3 is the flow chart according to the circuit field service paging implementing method of the embodiment of the invention;

Fig. 4 is that stored schematic diagram is processed and protected to embodiment of the invention first step in scene shown in Figure 2;

Fig. 5 is that stored schematic diagram is processed and protected to 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, is not intended to limit the present invention.

Embodiment of the method

Can find out from top description, if realize that MSC/VLR always can normally carry out the paging of CS business, MSC/VLR need to preserve the SGs incidence relation always when ISR activates.But because there is not Gs interface between MSC/VLR and the SGSN, in the situation that shown in Figure 2, when UE activated from UMTS/GSM access ISR, 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 to preserve the SGs incidence relation.Processing when the present invention receives LAU message and carries out paging from the IU-CS/A interface by MSC/VLR in the modification prior art realizes.

Below, above-mentioned processing procedure is elaborated.

In the present embodiment, provide a kind of circuit field service paging implementing method, be used in the situation that ISR activates, mobile switching center/visitor location register is carried out circuit field service paging to subscriber equipment.Fig. 3 is the flow chart according to the circuit field service paging implementing method of the embodiment of the invention.As shown in Figure 3, comprise the steps:

Step S302, mobile switching center/visitor location register is that GERAN/UTRAN receives location update request message by the global mobile communication system/general mobile communication system, judge that the SGs that exists to mobile management entity is related, then continue to preserve described SGs related;

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 to be known wherein preservation is related to the SGs of MME rather than related to the Gs of SGSN, that is to say, it is related related with Gs that MSC/VLR need to 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) show that according to the address information table difference of mode is distinguished SGs related with Gs; (3) distinguish according to the difference of interface protocol; It perhaps is the combination of above-mentioned differentiating method.

When step S302 implemented, MSC/VLR was when determining whether to need to keep the SGs association, and a variety of judgment criterion can be arranged: (1) is that the SGs association then keeps.(2) be that SGs is related, and the SGSN that satisfies the current access of UE does not support Gs interface (obtaining by the mode that configures) in MSC/VLR, and UE just supports the mobile phone of circuit domain dropping not to be or current not being operated under some conditional 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/visitor location register is carried out the CS service paging, carries out respectively paging 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/visitor location register is carried out paging by IU-CS/A interface and SGs interface simultaneously; Mobile switching center/visitor location register is at first carried out paging by the IU-CS/A interface, in the situation that paging failure carries out paging by the SGs interface; Mobile switching center/visitor location register is at first carried out paging by the SGs interface, in the situation that paging failure carries out paging by the IU-CS/A interface.

In addition, after step S304, can further include: when the positional information of mobile management entity or terminal changes, the SGs that the position updating request information updating that mobile switching center/visitor location register sends according to the mobile management entity that receives is preserved is related, and deletes the IU-CS/A interface relevant information of wherein preserving; Mobile switching center/visitor location register again 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 lower 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 the second step operation is 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 only having 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 arranges a flag information and this flag information is set is that SGs is related, is used for distinguishing SGs related related with Gs.

As shown in Figure 5, UE is from the EPS Network Mobility to the UMTS/GSM 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 that SGs is related, then preserves SGs association and IU-CS/A relevant information.

After finishing second step shown in Figure 2, if UE accesses always, do not move to the EPS network in the UMTS/GSM network, just preserve so SGs association and IU-CS/A mouth relevant information among the MSC/VLR always.After finishing second step shown in Figure 2, if UE is from the UMST/GSM Network Mobility to the EPS network, the tracking area at the current place of UE is in chartered tracking area tabulation, because ISR activates, UE does not unite the TAU/LAU process, preserves so SGs association and IU-CS/A interface relevant information among the MSC/VLR.

In above-mentioned two situations, 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, the MSC/VLR judgement exists SGs association and IU-CS/A interface relevant information, 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, at EPS ICQ UE, in the situation that UE is current in the EPS network insertion, can paging arrive UE.GERAN/UTRAN receives paging request, and paging UE in the UMTS/GSM network in the situation that UE is current in the UMS/GSM network insertion, 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 is from the UMST/GSM Network Mobility to the EPS network, the tracking area at the current place of UE is not in chartered tracking area tabulation, 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 again, even ISR activates, because CS territory and PS territory are to adhere to respectively access, UE always can initiate the LAU process, MSC/VLR can preserve again SGs association and IU-CS/A interface relevant information after receiving the LAU request from the IU-CS/A interface.Follow-up when UE moves 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 in the situation that ISR activates, mobile switching center/visitor location register 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, preserving 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 modes distinguished related with Gs of 80 couples of SGs (there is the mode of SGs association in judgement) can for: (one) is when setting up the SGs association, use newly-increased flag information mode to related distinguish related with Gs of SGs, follow-uply distinguish according to this flag information; (2) show that according to the address information table difference of mode distinguishes; (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:

(1) SGs is related and IU-CS/A interface relevant information is set to current effective simultaneously;

(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 the SGs association according to the IU-CS/A interface relevant information of preserving and preservation, carries out respectively paging by IU-CS/A interface and SGs interface.

Preferably, above-mentioned paging module 82 is carried out respectively paging by following arbitrary mode 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, in the situation that paging failure carries out paging by the SGs interface; The paging module is at first carried out paging by the SGs interface, in the situation that paging failure carries out paging by the IU-CS/A interface.

In addition, said apparatus further comprises:

Update module, be used for when the positional information of mobile management entity or terminal changes, 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 again, continuing to preserve the SGs related information that upgrades.

Preferably, said apparatus is mobile switching center/visitor location register.

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, thereby so that CSFB and ISR function can be closed deposits, be conducive to the application of EPS network under the diverse network deployment scenario.

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 modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. circuit field service paging implementing method, be used in the situation that under the idle pulley saving signaling ISR activate, mobile switching center/visitor location register is carried out paging to subscriber equipment, it is characterized in that, described method comprises:
Mobile switching center/visitor location register is that GERAN/UTRAN receives location update request message by the global mobile communication system/general mobile communication system, judges that the SGs that exists to mobile management entity is related, then continues to preserve described SGs related;
When described mobile switching center/visitor location register is carried out paging, carry out respectively paging by IU-CS/A interface and SGs interface.
2. method according to claim 1 is characterized in that, described mobile switching center/visitor location register judgement exists the SGs association to be specially:
Described mobile switching center/visitor location register 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; Show that according to the address information table difference of mode distinguishes; 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 simultaneously described SGs association and described IU-CS/A interface relevant information current effective; 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/visitor location register is carried out respectively paging by following arbitrary mode 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 by described IU-CS/A interface, in the situation that described paging failure carries out paging by described SGs interface;
At first carry out paging by described SGs interface, in the situation that described paging failure carries out paging by described IU-CS/A interface.
5. according to claim 1 to 4 each described methods, it is characterized in that, further comprise:
When the positional information of described mobile management entity or described terminal changes, the described SGs that the position updating request information updating that described mobile switching center/visitor location register sends according to the described mobile management entity that receives is preserved is related, and deletes the described IU-CS/A interface relevant information of preserving;
When the IU-CS/A interface by described UTRAN/GERAN receives location update request message again, continue to preserve the described SGs related information that upgrades in described mobile switching center/visitor location register.
6. a circuit field service paging implement device is used in the situation that ISR activates, and described device carries 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 the described SGs association through sign;
The paging module is further used for the described SGs association according to the described IU-CS/A interface relevant information of preserving and preservation, carries out respectively paging by described IU-CS/A interface and SGs interface;
Wherein, described device is mobile switching center/visitor location register.
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; Show that according to the address information table difference of mode distinguishes; 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 be, 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 respectively paging by following arbitrary mode 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, in the situation that described paging failure carries out paging by described SGs interface;
Described paging module is at first carried out paging by described SGs interface, in the situation that described paging failure carries out paging by described IU-CS/A interface.
10. according to claim 6 to 9 each described devices, it is characterized in that, described mobile switching center/visitor location register further comprises:
Update module, be used for when the positional information of described mobile management entity or described terminal changes, 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 again.
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