CN102404708A - Domain selection method and system for called user, and HLR in the system - Google Patents

Abstract

The application provides a domain selection method and a domain selection system for a called user, and a Home Location Register (HLR) responsible for domain selection. The domain selection method of the called user comprises the following steps: the home location register HLR learns that a calling user in a CS domain initiates a call to a called user; the HLR determines the registration state of the called user in the CS domain; the HLR inquires a Home Subscriber Server (HSS) to determine the terminal type of the called subscriber and the registration state of the called subscriber in an IMS domain; and the HLR routes the call according to the determined registration state of the called user in the CS domain, the terminal type of the called user and the registration state of the called user in the IMS domain. The HSS is inquired by configuring the HLR to acquire the terminal type of the called user and the registration state of the IMS domain of the called user, and the domain selection of the called user can be realized when the CS domain user initiates a call without changing the structure of the existing network and adding a new server.

Description

HLR in called subscriber's area selecting method and system and the system

Technical field

The application relates to moving communicating field, relates in particular to a kind of called subscriber's area selecting method and system, and the HLR in the system.

Background technology

Voice call continuity service (VCC, Voice Call Continuity) is meant the continuity of audio call between circuit switching (CS territory) and the IP Multimedia System (IMS territory) in the second generation/third generation (2G/3G) mobile radio communication.The subject matter that VCC solves is to switch, and comprises that the IMS territory switches to the CS territory and switches to the IMS territory from the CS territory.The territory of VCC is selected to solve the cross-domain problem of voice, and it can not solve the problem of called subscriber's network selection.

Altogether number is a system of when there are many core networks in operator, sharing same set of sign indicating number number, in coding system altogether identical yard number can be resident in many core networks at the same time or separately.For example, signatory simultaneously CS territory of user and CM-IMS territory, and at these two territories use duplicate numberses.For the user who is total to number, the problem that existence domain is selected.For example, there is the user of number altogether, needs to solve the land network selection problem of called subscriber in CS territory and IMS territory for CS territory and IMS territory.

Core network system and the method for calling of supporting different field general terminal, application number are disclosed in being 200810226499.2 one Chinese patent application.In this patent; The service control point SCP of CS domain core net can with attaching position register (HLR; Home Location Register) and home subscriber server (HSS; Home Subscriber Server) mutual, and increased the network selection application server in the IMS territory, network selection application server and HLR and HSS alternately and with CSCF (CSCF; Call Session Control Function) communication connects, according to the log-on message and the network selection policy information instruction CSCF network selection at terminal.Yet the core network system in this application need increase the network selection application server, and need improve SCP SCP, structure more complicated simultaneously.

Summary of the invention

The technical problem that the application will solve is; To above-mentioned defective of the prior art; A kind of called subscriber's area selecting method and system are provided, can realize that called subscriber's when CS territory user makes a call territory is selected, and avoid changing the structure server new of existing network with increase.

According to the application's a aspect, a kind of called subscriber's area selecting method is provided, comprise that attaching position register HLR knows that CS territory calling subscriber makes a call to the called subscriber; Said HLR confirms the login state of said called subscriber in the CS territory; Said HLR inquiry home subscriber server HSS confirms said called subscriber's terminal type and at the login state in IMS territory; And said HLR according to determined called subscriber in the login state in CS territory, called subscriber's terminal type and called subscriber login state, the said calling of route in the IMS territory.

Another aspect according to the application; A kind of attaching position register HLR is provided; Comprise determination module; When the called subscriber makes a call, confirm the login state of said called subscriber CS territory calling subscriber in the CS territory, and to home subscriber server HSS inquiry with the terminal type of confirming said called subscriber and at the login state in IMS territory; And the routing decision module, according to determined called subscriber in the login state in CS territory, called subscriber's terminal type and called subscriber login state, the said calling of route in the IMS territory.

Another aspect according to the application; A kind of called subscriber's domain selecting system is provided; Comprise attaching position register HLR and home subscriber server HSS; It is characterized in that, when CS territory calling subscriber when the called subscriber makes a call, said HLR confirms the login state of said called subscriber in the CS territory; Said HLR inquires about that said HSS confirms said called subscriber's terminal type and at the login state in IMS territory; And said HLR according to determined called subscriber in the login state in CS territory, called subscriber's terminal type and called subscriber login state, the said calling of route in the IMS territory.

According to the application, inquire about HSS through configuration HLR and obtain called subscriber's the terminal type and the login state in IMS territory thereof, need not to change the structure server new of existing network with increase, just can realize that called subscriber's when CS territory user makes a call territory is selected.

Description of drawings

When Fig. 1 shows CS territory user according to a kind of execution mode of the application and makes a call, the method flow diagram that called user domain is selected.

When Fig. 2 shows CS territory user according to the application's another kind of execution mode and makes a call, the flow chart that called user domain is selected.

Fig. 3 shows the framework that comprises according to the core net of called subscriber's domain selecting system of the application.

Fig. 4 shows the module map according to the attaching position register HLR of a kind of execution mode of the application.

Fig. 5 shows the module map according to the attaching position register HLR of the application's another kind of execution mode.

Embodiment

With reference to the accompanying drawings to called subscriber's in the application disclosed CS territory and the IMS territory area selecting method and system, and the HLR in this system is elaborated.

When Fig. 1 shows CS territory user according to a kind of execution mode of the application and makes a call, the method flow diagram that called user domain is selected.

As shown in Figure 1, in step 110, attaching position register HLR knows that CS territory calling subscriber makes a call to the called subscriber.For example, when the calling subscriber made a call in the CS territory, mobile switching center server MSC S sent message to attaching position register HLR, and indication HLR calling subscriber makes a call in the CS territory.

In step 120, HLR confirms the login state of called subscriber in the CS territory.Be appreciated that HLR can confirm the login state of called subscriber in the CS territory through the registration status information of inquiring about the terminal, CS territory of self storing.

In step 130, HLR inquiry home subscriber server HSS confirms called subscriber's terminal type and at the login state in IMS territory.

According to a kind of execution mode, step 130 may further include: HLR sends query messages to HSS; In response to query messages, HSS returns acknowledge message to HLR, has carried called subscriber's terminal type and the called subscriber registration status information in the IMS territory in this acknowledge message; And HLR is according to the affirmation message that receives from HSS, confirms called subscriber's terminal type and at the login state in IMS territory.Be appreciated that the registration status information that in HSS, stores terminal, IMS territory, also can the storage terminal type in HSS.Alternatively, when among the HSS not during the storage terminal type, the mode of the application server AS that HSS can be through inquiry IMS territory is obtained terminal type.According to the application, HLR can confirm called subscriber's terminal type and at the login state in IMS territory through the mode of inquiry HSS.

In step 140, HLR can be according to determined called subscriber in the login state in CS territory, called subscriber's terminal type and the called subscriber login state in the IMS territory, routing call.

According to a kind of execution mode,, can directly confirm routing mode at the login state of CS territory and IMS according to the called subscriber for singly treating the terminal.

That is to say, when called subscriber's terminal type for singly treating the terminal, the login state in the CS territory is registered, and the login state in the IMS territory is when being unregistered, HLR routes the call to the CS territory user that continues.When called subscriber's terminal type for singly treating the terminal, the login state in the CS territory is unregistered, and the login state in the IMS territory is when being registered, HLR routes the call to the IMS territory user that continues.When called subscriber's terminal type for singly treating the terminal, the login state in the CS territory is unregistered, and the login state in the IMS territory does not carry out route to this calling when being unregistered.At this moment, HLR is for example can subscriber call called unregistered.

According to a kind of execution mode; When called subscriber's terminal type is double-standby terminal; HLR inquiry HSS confirms the voice service login state of called subscriber in the IMS territory, further according to the called subscriber in the voice service login state in IMS territory and called subscriber login state, routing call in the CS territory.Because for double-standby terminal, not allly can both support voice service, thereby can answer the call in the IMS territory at registered terminal, IMS territory, therefore need to confirm the voice service login state of terminal called.In addition, even also can there be current situation about only registering in a territory in double-standby terminal, therefore, need confirm routing mode according to the login state of reality.

According to a kind of embodiment, when the voice service login state of called subscriber in the IMS territory is unregistered, when the login state in the CS territory was registered, HLR routed the call to the CS territory user that continues.When the voice service login state of called subscriber in the IMS territory is unregistered, when the login state in the CS territory is unregistered, route is not carried out in this calling.At this moment, can think the for example current off-mode that is in of called subscriber.

According to another kind of embodiment, when the voice service login state of called subscriber in the IMS territory is registered, when the login state in the CS territory was unregistered, HLR routed the call to the IMS territory user that continues.When the voice service login state of called subscriber in the IMS territory is registered, when the login state in the CS territory was registered, HLR indicated triggering intelligent network service.That is to say that when the called subscriber is in two treating, and two territory be all can answer the call the time, HLR can indicate triggering intelligent network service.For example, in intelligent network business, can carry out follow-up Business Processing, for example trigger one number service by the service control point SCP of CS domain core net.

According to a kind of execution mode, HLR routes the call to continue user's step of CS territory and can comprise: HLR sends terminal unit contractual information or mobile station roaming number to mobile switching center server MSC S.MSCS is according to the terminal unit contractual information or the mobile station roaming number that receive, and advise called subscriber CS territory answers the call.

According to a kind of execution mode, HLR routes the call to continue user's step of IMS territory and can comprise: HLR sends the indication that continues of IMS territory to mobile switching center server MSC S.For example, send routing number+called number (RN+B) message, indication IMS continues in the territory.MSCS receives from the IMS territory of HLR and continues after the indication, sends the initial session request to MGCF MGCF, answers the call with advise called subscriber IMS territory.For example, after MGCF receives the message from MSCS, send indication, answer the call through the IMS territory by CSCF to CSCF CSCF.

When Fig. 2 shows CS territory user according to a kind of execution mode of the application and makes a call, the idiographic flow that called subscriber UE2 territory is selected.

When calling subscriber UE1 made a call in the CS territory, in step 201, initial address message was sent to mobile switching center server MSC S.Wherein, carry in the initial address message called subscriber UE2 the sign indicating number number.In step 202, MSCS sends message to attaching position register HLR, and indication CS territory calling subscriber makes a call to called subscriber UE2.

HLR is known CS territory calling subscriber after called subscriber UE2 makes a call from MSCS, and in step 203, the registration status information at the terminal, CS territory of HLR inquiry self storage is confirmed the login state of called subscriber UE2 in the CS territory.

In step 204, HLR sends query messages to HSS, the terminal type of inquiry called subscriber UE2 and at the login state in IMS territory.

In step 205, HSS returns acknowledge message to HLR, wherein, has carried terminal type in the acknowledge message and at the login state in IMS territory.

HLR can be according to determined called subscriber UE2 in the terminal type of the login state in CS territory, called subscriber UE2 and the called subscriber UE2 login state in the IMS territory, routing call.

For example, when the terminal type of called subscriber UE2 for singly treating the terminal, the login state in the CS territory is registered, and the login state in the IMS territory is when being unregistered, HLR routes the call to the CS territory user that continues.At this moment; In step 206; HLR sends normal terminal unit contractual information T-CSI or mobile station roaming number MSRN to MSCS; Thereby in step 207, MSCS sends the initial session request according to terminal unit contractual information T-CSI or mobile station roaming number MSRN to called subscriber UE2, and advise called subscriber UE2CS territory answers the call.

When the terminal type of called subscriber UE2 for singly treating the terminal, the login state in the CS territory is unregistered, and the login state in the IMS territory is when being registered, HLR routes the call to the IMS territory user that continues.At this moment, in step 206 ' in, HLR sends the indication that continues of IMS territory to MSCS, for example, and transmission routing number+called number (RN+B) message.MSCS receives from the IMS territory of HLR and continues after the indication, in step 208, sends the initial session request to MGCF MGCF, answers the call with advise called subscriber IMS territory.After MGCF received the message from MSCS, in step 209, advise called subscriber UE2 answered the call through the IMS territory.For example, MGCF can send indication to CSCF CSCF (not shown), is answered the call through the IMS territory by the further advise called subscriber UE2 of CSCF.

When said called subscriber's terminal type for singly treating the terminal, the login state in the CS territory is unregistered, and the login state in the IMS territory does not carry out route to this calling when being unregistered.

When the terminal type of in step 205, confirming the called subscriber is double-standby terminal, HLR will further send query messages to HSS in step 210, and inquiry called subscriber UE2 is at the voice service login state in IMS territory.In step 211, HSS returns acknowledge message to HLR, wherein, has carried the voice service registration status information of called subscriber UE2 in the IMS territory in the acknowledge message.At this moment, HLR can be according to the called subscriber in the voice service login state in IMS territory and the called subscriber login state in the CS territory, routing call.

For example, when the voice service login state of called subscriber in the IMS territory is unregistered, when the login state in the CS territory was registered, HLR execution in step 206 routed the call to the CS territory user that continues.When the voice service login state of called subscriber in the IMS territory is unregistered, when the login state in the CS territory was unregistered, HLR did not carry out route to this calling.

When the voice service login state of called subscriber in the IMS territory is registered, when the login state in the CS territory was unregistered, HLR execution in step 206 ' routed the call to the IMS territory user that continues.

When the voice service login state of called subscriber in the IMS territory is registered, when the login state in the CS territory was registered, HLR indicated triggering intelligent network service.Wherein, the execution and the prior art of intelligent network business are similar, repeat no more at this.

Fig. 3 shows the framework that has according to the core net of called subscriber's domain selecting system of the application.

As shown in Figure 3, the system of selecting according to the application's called user domain comprises: attaching position register HLR300 and home subscriber server HSS400.When CS territory calling subscriber when the called subscriber makes a call, HLR300 confirms the login state of called subscriber in the CS territory; HLR300 inquiry HSS400 confirms called subscriber's terminal type and at the login state in IMS territory; And HLR300 according to determined called subscriber in the login state in CS territory, called subscriber's terminal type and called subscriber login state, routing call in the IMS territory.

According to a kind of execution mode; The system that the application's called user domain is selected may further include mobile switching center server MSC S500; Said HLR according to determined called subscriber at the login state in CS territory, called subscriber's terminal type and called subscriber login state in the IMS territory; Behind the routing mode of having confirmed to call out, send the route indication to said MSCS, said MSCS notifies said called subscriber CS territory or IMS territory to answer the call according to receiving the route indication.

According to a kind of execution mode; The system that the application's called user domain is selected may further include MGCF MGCF600 and CSCF CSCF700; When said MSCS notifies said called subscriber IMS territory to answer the call according to the route indication that receives; Said MSCS sends the initial session request to said MGCF, and said MGCF is the said CSCF of indication further, is answered the call through the IMS territory by the CSCF advise called subscriber.

Fig. 4 shows the module map according to the attaching position register HLR of a kind of execution mode of the application.

As shown in the figure, attaching position register HLR comprises determination module 310 and routing decision module 320.When the called subscriber made a call, determination module 310 was confirmed the login state of called subscribers in the CS territory CS territory calling subscriber, and to home subscriber server HSS inquiry with the terminal type of confirming the called subscriber and at the login state in IMS territory.Routing decision module 320 according to determined called subscriber in the login state in CS territory, called subscriber's terminal type and called subscriber login state, routing call in the IMS territory.

According to a kind of execution mode, when called subscriber's terminal type for singly treating the terminal, the login state in the CS territory is registered, and the login state in the IMS territory is when being unregistered, the routing decision module routes the call to the CS territory user that continues; When called subscriber's terminal type for singly treating the terminal, the login state in the CS territory is unregistered, and the login state in the IMS territory is when being registered, the routing decision module routes the call to the IMS territory user that continues; And when called subscriber's terminal type for singly treating the terminal, the login state in the CS territory is unregistered, and the login state in the IMS territory is when being unregistered, the routing decision module is not carried out route to this calling.

According to another kind of execution mode; When called subscriber's terminal type is double-standby terminal; Determination module inquiry HSS confirms the voice service login state of called subscriber in the IMS territory; The routing decision module according to the called subscriber in the voice service login state in IMS territory and called subscriber login state, routing call in the CS territory.According to a kind of embodiment, when the voice service login state of called subscriber in the IMS territory is unregistered, when the login state in the CS territory was registered, the routing decision module routed the call to the CS territory user that continues; And when the voice service login state of called subscriber in the IMS territory be unregistered, when the login state in the CS territory was unregistered, the routing decision module was not carried out route to this calling.According to another kind of embodiment, when the voice service login state of called subscriber in the IMS territory is registered, when the login state in the CS territory is registered, routing decision module indication triggering intelligent network service; And when the voice service login state of called subscriber in the IMS territory be registered, when the login state in the CS territory was unregistered, the routing decision module routed the call to the IMS territory user that continues.

Fig. 5 shows the module map according to the attaching position register HLR of the application's another kind of execution mode.

As shown in Figure 5, among the HLR really cover half piece 310 may further include query unit 311 and definite unit 312.Query unit 311 can be sent query messages to HSS.Confirm that unit 312 can be according to the affirmation message that receives from HSS, confirm called subscriber's terminal type and at the login state in IMS territory.

In addition, the routing decision module 320 among the HLR300 may further include route judging unit 321 and route indicating member 322.Route judging unit 321 can be according to determined called subscriber the login state in CS territory, called subscriber's terminal type and called subscriber at the login state in IMS territory, judge routing mode.Route indicating member 322 can be according to the routing mode of being judged, indication mobile switching center server MSC S routing call.

Abovely be described with reference to the exemplary embodiment of accompanying drawing to the application.Those skilled in the art should understand that; Above-mentioned embodiment only is for illustrative purposes and the example of being lifted; Rather than be used for limiting; Any modification of being done under all instruction and claim protection ranges in the application, be equal to replacement etc., all should be included in the scope that the application requires to protect.

Claims (18)

1. A domain selection method for a called user, comprising The home location register HLR learns that the calling user in the CS domain initiates a call to the called user; The HLR determines the registration status of the called user in the CS domain; The HLR queries the Home Subscriber Server HSS to determine the terminal type of the called user and its registration status in the IMS domain; and The HLR routes the call according to the determined registration status of the called user in the CS domain, the terminal type of the called user, and the registration status of the called user in the IMS domain. 2. The method of claim 1, further comprising: When the terminal type of the called user is a single-standby terminal, the registration status in the CS domain is registered, and the registration status in the IMS domain is unregistered, the HLR routes the call to the CS domain to connect the user; When the terminal type of the called user is a single-standby terminal, the registration state in the CS domain is unregistered, and the registration state in the IMS domain is registered, the HLR routes the call to the IMS domain to connect the user; as well as When the terminal type of the called user is a single-standby terminal, the registration status in the CS domain is unregistered, and the registration status in the IMS domain is unregistered, the call is not routed. 3. The method according to claim 1, further comprising: when the terminal type of the called user is a dual-standby terminal, the HLR queries the HSS to determine the voice service registration status of the called user in the IMS domain , routing the call according to the voice service registration status of the called user in the IMS domain and the registration status of the called user in the CS domain. 4. The method of claim 3, further comprising: When the voice service registration status of the called user in the IMS domain is unregistered and the registration status in the CS domain is registered, the HLR routes the call to the connected user in the CS domain; and When the voice service registration status of the called user in the IMS domain is unregistered and the registration status in the CS domain is unregistered, the call is not routed. 5. The method of claim 3, further comprising: When the voice service registration status of the called user in the IMS domain is registered and the registration status in the CS domain is registered, the HLR indicates to trigger the intelligent network service; and When the voice service registration status of the called user in the IMS domain is registered and the registration status of the CS domain is unregistered, the HLR routes the call to the connected user in the IMS domain. 6. The method according to claim 1, wherein the step of HLR querying HSS to determine the terminal type of the called user and its registration status in the IMS domain comprises: The HLR sends a query message to the HSS; In response to the query message, the HSS returns an acknowledgment message to the HLR, wherein the acknowledgment message carries the terminal type of the called user and the registration status information of the called user in the IMS domain; and The HLR determines the terminal type of the called user and its registration status in the IMS domain according to the confirmation message received from the HSS. 7. The method according to claim 1, wherein the step of the HLR routing the call to the CS domain connecting user comprises: The HLR sends the terminal subscription information or the roaming number of the mobile station to the mobile switching center server MSCS; and The MSCS notifies the called user to the CS domain to answer the call according to the received terminal subscription information or the roaming number of the mobile station. 8. The method of claim 1, wherein the step of the HLR routing the call to an IMS domain connection user comprises: The HLR sends an IMS domain connection indication to the mobile switching center server MSCS; and After receiving the IMS domain connection instruction from the HLR, the MSCS sends an initial session request to the media gateway control function MGCF to notify the called user that the IMS domain accepts the call. 9. A home location register HLR, comprising The determining module determines the registration status of the called user in the CS domain when the calling user in the CS domain initiates a call to the called user, and queries the home subscriber server HSS to determine the terminal type of the called user and its the registration status of the IMS domain; and The routing decision module routes the call according to the determined registration status of the called user in the CS domain, the terminal type of the called user, and the registration status of the called user in the IMS domain. 10. The HLR according to claim 9, wherein, when the terminal type of the called user is a single-standby terminal, the registration status in the CS domain is registered, and when the registration status in the IMS domain is unregistered, the The routing decision-making module routes the call to the connected user in the CS domain; when the terminal type of the called user is a single-standby terminal, the registration status in the CS domain is unregistered, and the registration status in the IMS domain is registered , the routing decision module routes the call to the connected user in the IMS domain; and when the terminal type of the called user is a single-standby terminal, the registration status in the CS domain is unregistered, and the registration status in the IMS domain is When not registered, the routing decision-making module does not route the call. 11. The HLR according to claim 9, wherein, when the terminal type of the called user is a dual-standby terminal, the determining module queries the HSS to determine the voice service registration status of the called user in the IMS domain The routing decision module routes the call according to the voice service registration status of the called user in the IMS domain and the registration status of the called user in the CS domain. 12. The HLR according to claim 11, wherein, when the voice service registration status of the called user in the IMS domain is unregistered, and the registration status in the CS domain is registered, the routing decision module will The call is routed to the connected user in the CS domain; and When the voice service registration status of the called user in the IMS domain is unregistered and the registration status in the CS domain is unregistered, the routing decision module does not route the call. 13. The HLR according to claim 11, wherein, when the voice service registration status of the called user in the IMS domain is registered, and the registration status in the CS domain is registered, the routing decision module indicates to trigger the intelligent Internet business; and When the voice service registration status of the called user in the IMS domain is registered and the registration status in the CS domain is unregistered, the routing decision module routes the call to the connected user in the IMS domain. 14. The HLR according to claim 9, said determination module further comprising a query unit, sending a query message to the HSS; The determining unit determines the terminal type of the called user and its registration status in the IMS domain according to the confirmation message received from the HSS. 15. The HLR according to claim 9, said routing decision module further comprising The routing judging unit judges the routing mode according to the determined registration status of the called user in the CS domain, the terminal type of the called user, and the registration status of the called user in the IMS domain; The routing instructing unit instructs the mobile switching center server MSCS to route the call according to the determined routing mode. 16. A domain selection system for a called user, comprising a Home Location Register (HLR) and a Home Subscriber Server (HSS), characterized in that when a CS domain calling user initiates a call to the called user, the HLR determines that the called user Registration status in the CS domain; the HLR queries the HSS to determine the terminal type of the called user and its registration status in the IMS domain; and the HLR determines the registration status of the called user in the CS domain, The terminal type of the called user and the registration status of the called user in the IMS domain are used to route the call. 17. The system according to claim 16, further comprising a mobile switching center server MSCS, the HLR sends a routing indication to the MSCS, and the MSCS notifies the called user CS domain to answer the call according to the received routing indication or The IMS domain answers the call. 18. The system according to claim 17, further comprising a Media Gateway Control Function (MGCF) and a Call Session Control Function (CSCF), when the MSCS informs the called user that the IMS domain answers the call according to the received routing instruction, the MSCS Send an initial session request to the MGCF, the MGCF further instructs the CSCF, and the CSCF notifies the called user to answer the call through the IMS domain.

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