CN102421085A

CN102421085A - Location updating method and system

Info

Publication number: CN102421085A
Application number: CN2010105069908A
Authority: CN
Inventors: 游世林; 王刚; 曲爱妍; 朱进国; 刘建业; 周宇翔
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-09-28
Filing date: 2010-09-28
Publication date: 2012-04-18
Anticipated expiration: 2030-09-28
Also published as: CN102421085B

Abstract

The invention discloses a location updating method and system. The location updating method comprises the steps of: when a dual-mode dual-standby terminal capable of using two IMSIs (International Mobile Subscriber Identities) accesses a network, selecting one IMSI according to an access type and carrying the IMSI or a TMSI (Temporary Mobile Subscriber Identity) corresponding to the IMSI in a sent first location updating request; after a core network device receives the first location updating request, carrying the IMSI and a core network device identification in a second location updating request message sent to a sign server; and after the sign server receives the second location updating request message, storing or updating the core network device identification corresponding to the IMSI into the core network device identification carried in the second location updating request. In the invention, the dual-mode dual-standby terminal can be accessed into different networks by using the same MSISDN (Mobile Station International ISDN (Integrated Services Digital Network) Number), and a subscriber does not need to select the MSISDN, thus better experience is obtained.

Description

Method and system for updating position

Technical Field

The present invention relates to the field of communications, and in particular, to a method and a system for location update.

Background

The existing communication system comprises 2G (2)^ndGeneration, second Generation) mobile communication system and 3G (3)^rdGeneration, third Generation) Mobile communication System, in which the 2G communication System includes Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA) Mobile communication systems according to different standards; the 3G mobile communication system is evolved from a 2G mobile communication system, GSM is evolved into a Wideband Code Division Multiple Access (WCDMA) mobile communication system and a Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) mobile communication system, and CDMA is evolved into a CDMA2000 mobile communication system.

The following is a diagram (shown in fig. 1) of GSM and WCDMA/TD-SCDMA systems only to illustrate the principles of the mobile communication system, and when implemented, CDMA and CDMA2000 mobile communication systems may be included.

The existing GSM and WCDMA/TD-SCDMA mobile communication systems include two Radio Access networks (Access networks, AN for short) including 2G GERAN (GSM EDGE Radio Access Network, global system for mobile communications Radio Access Network for enhancing data rate), which is shown in AN 1; and UTRAN (Universal Radio Access Network, Universal Terrestrial Radio Access Network) of 3G, which is shown as AN 2. A User terminal (User Equipment, abbreviated as UE) includes UE supporting 2G access, that is, UE1 of fig. 1, and UE supporting 3G access, that is, UE2 of fig. 1, and further includes a dual-mode terminal supporting both 2G and 3G access, that is, UE3 of fig. 1, the terminal includes 2 transceiver systems, the terminal also includes 2 types, one type is a terminal with only one User card, the terminal selects a corresponding network according to personal desire of the User or network signal strength at the location of the User, the terminal is called a dual-mode single-standby terminal, the other type is a terminal with 2 User cards, the User can access two different networks simultaneously, even one terminal can support access to a CDMA network, the terminal is called a dual-mode terminal; the Core Network (CN) comprises Circuit Switched (CS) Network elements and Packet Switched (PS) Network elements, wherein the CS Network elements comprise 2G CS Network elements MSC/VLR (Mobile switching Center/visitor location Register), as shown in CN1 and CN2, UE1 may roam from CN2 to CN1, the CS Network elements further comprise 3G CS Network elements MSCs/MGW (Mobile switching Center Server/Media Gateway), as shown in CN3 and CN4, UE2 may roam from CN4 to CN3, UE3 may roam between CN1, CN2, CN3 and CN4, and the CS Network elements further comprise Mobile Gateway Mobile switching Center/Gateway to CN3, GMSC MSC/MSC for routing MSC/MSC signaling and GMSC for routing to the MSC/MSC and MSC for routing, TMSC is mainly used for long-distance tandem of user or signaling exchange with other exchange network; the PS network element includes a Serving GPRS Support Node (SGSN) network element and a Gateway GPRS Support Node (GGSN) network element, and the GGSN is used as a router to connect to an external Packet data network.

In addition, a Home Location Register/Home subscriber Server (Home Location Register/Home subscriber Server, abbreviated as HLR/HSS), hereinafter referred to as a subscription Server, is used for managing data of a CS domain and a PS domain network, the HLR/HSS provides 2G data for CN1 and CN2, and also provides 3G data for CN3 and CN4, wherein CN3 and CN4 may be directly connected to the HLR/HSS similar to CN1 and CN2, or may be connected to the HLR/HSS through GMSC/TMSC.

With the continuous updating and development of technology, the 3G core network can support GERAN and UTRAN access at the same time, i.e. the mode that AN1 accesses to CN3 as shown in fig. 1 is called a co-core network mode, while the mode that AN1 accesses to CN1, AN2 accesses to CN3, such as GERAN accesses to 2G core network, and UTRAN accesses to 3G core network is called a sub-core network mode.

The general location update flow of the 2G technology and the 3G technology is described below, i.e., as shown in fig. 2.

The flow comprises the flow that the UE1 roams from CN2 to CN1, or the UE2 roams from CN4 to CN3, or the UE3 roams from CN1, CN2 or CN4 to CN3, or the UE3 roams from CN2, CN3 or CN4 to CN1, or the user terminal is started up for the first time.

201, UE1/UE2/UE3 initiates a Location update request message to CN1/CN3 through AN access network AN1/AN2, where the message carries the type of the Location update, and indicates whether the Location update is normal or periodic, or is AN International Mobile Subscriber Identity (IMSI) attach, and the message also carries a Subscriber Identity IMSI or a Temporary Identity (TMSI), and the message also includes a Location Area Identity (LAI), and the message includes a Subscriber category 1(Mobile Station class 1) or a Subscriber category 2(Mobile Station class 2).

202, CN1/CN3 checks user ID, if CN1/CN3 does not recognize temporary identification code TMSI, then it can obtain IMSI to UE through access network, CN1/CN3 checks whether to store user's authentication vector, if there is no authentication vector, then it carries user ID IMSI to send authentication request message to HLR/HSS, and applies for authentication vector to HLR/HSS;

203, HLR/HSS sends authentication request response message to CN1/CN3, said message sends multiple groups of authentication vectors, such as three or five groups, to CN1/CN3 according to the configuration in HLR/HSS;

204, CN1/CN3 sends authentication request message to UE through AN1/AN 2;

205, the UE calculates a result by AN authentication algorithm, and sends AN authentication request response message to CN1/CN3 through AN1/AN2 carrying the authentication result, after receiving the message, CN1/CN3 compares the authentication result, if the authentication result is not consistent with the authentication result calculated in the network, it indicates that the authentication fails, and returns a location update failure to the UE, if the comparison result is consistent, it indicates that the authentication succeeds;

206, after CN1/CN3 succeeds in authentication, sending a Mobile Application Part (MAP) location update request message (MAP UPDATELOCATION) to HLR/HSS, wherein the message carries the user identifier IMSI and the CN1/CN3 identifier, namely, the MSC address and VLR number;

207, the HLR/HSS checks the VLR number in storage, and if the VLR is not empty, sends a MAP cancel location request message (MAP cancel location) to the network CN2/CN4 represented by the stored VLR number, said message carrying the subscriber identity IMSI;

208, after CN2/CN4 deletes the stored subscription data, a MAP location deletion request response message is returned to HLR/HSS;

209, HLR/HSS sends a MAP insert Subscriber DATA message (MAP insert Subscriber DATA) to CN1/CN3, where the message carries Service DATA of a Subscriber and a Mobile Subscriber number (Mobile Subscriber International ISDN/PSTN number, MSISDN for short), where ISDN is an Integrated services Digital Network and is an abbreviation of an Integrated Service Digital Network, PSTN is a Public Switched Telephone Network and is an abbreviation of a Public Switched Telephone Network, and the message also carries a Subscriber number IMSI;

210, after CN1/CN3 receives MAP insert user data message, it stores user service data and user number IMSI and MSISDN, and sends back MAP insert user data response message to HLR/HSS;

211, HLR/HSS sends a MAP location update request response message back to CN1/CN 3;

212-213, CN1/CN3, AN1/AN2, UE1/UE2/UE3, completing the encryption process of the air interface through related encryption or decryption algorithms;

steps 212 and 213 are optional procedures and the encryption process may not be performed depending on the device condition of the operator.

214, CN1/CN3 sends a location update confirm message to UE1/UE2/UE3 through AN1/AN2, which may contain a TMSI reallocation command message if the network needs to reallocate TMSI, which carries the network allocated new TMSI;

215, UE1/UE2/UE3 saves the new TMSI, then sends a TMSI reallocation complete message to CN1/CN 3.

If step 214 has no TMSI reallocation command message, this step indicates that the location update is complete, and if included, the location update request is complete in step 215.

The calling flow initiated by the UE1 through AN1 and CN1 is introduced below, and similarly, the calling flow initiated by the UE2 through AN2 and CN2 and the calling flow initiated by the UE3 can be derived, as shown in fig. 3.

301, the UE1 sends a call setup message to the CN1 through AN1, where the call setup message carries a called number, and the message also carries a bearer capability of the current call, where the bearer capability indicates whether the current call is a voice service or a data service, and a video call is also one of the data services;

302, after checking the access capability of the UE1, the CN1 accepts the call, and sends a call processing message back to the UE1 through the AN1, wherein the call processing message indicates that the call of the UE1 is in progress;

303, CN1 analyzes the called number through number analysis, and if it is found that the call is an outgoing call, it sends an initial address message of ISDN user Part (ISDN user Part, ISUP for short) to the relevant tandem office or gateway office (GMSC/TMSC), where the ISUP initial address message carries the called number and also carries the carrying capacity;

304, the GMSC/TMSC forwards the ISUP initial address message to other networks (called networks of the current call);

305, after the called terminal rings, other networks send ISUP address full information to GMSC/TMSC;

306, GMSC/TMSC forwards ISUP address full message to CN 1;

307, after receiving the ISUP address full message, CN1 sends a ringing message to UE1 through AN1, and UE1 can hear the ring-back tone at this time;

308, after the called party answers the call, other networks send an ISUP response message to the GMSC/TMSC;

309, GMSC/TMSC forwards ISUP response message to CN 1;

310, after receiving the ISUP response message, CN1 sends a connection message to UE1 through AN 1;

311, the UE1 sends a connection confirm message to the CN1 through AN 1.

From here the caller setup procedure for UE1 is completed.

The following description is the called flow of other networks calling UE1 through AN1 and CN1, and the same reasoning can derive the called flow of initiating UE2 at AN2 and CN2, or the called flow of UE3, as shown in fig. 4.

401, other networks (calling networks) send an ISUP initial address message to the GMSC/TMSC, where the message carries a called number and a bearer capability of the call, and the bearer capability indicates whether the call is a voice service or a data service;

402, GMSC/TMSC analyzes the called number, and sends MAP routing query message (MAP Send routing information, SRI for short) to HLR/HSS corresponding to the called number according to the analysis result of the called number, wherein the message carries the called MSISDN number, and the message carries the load-bearing capacity of the call;

403, when the HLR/HSS queries the MSC address and VLR number in CN1 stored in the HLR/HSS, sending a MAP roaming number request message to CN1, where the message carries the IMSI of the called party and the MSC number of CN 1;

404, CN1 allocates a roaming Number (MSRN) to the corresponding IMSI according to the configuration, and CN1 carries the MSRN to send a MAP providing roaming Number request response message to HLR/HSS;

405, HLR/HSS carries MSRN and returns MAP route inquiry response message to GMSC/TMSC;

406, the GMSC/TMSC analyzes the MSRN number, and sends an ISUP initial address message to CN1 according to the analysis result, where the message carries the MSRN and the bearer capability;

407, after receiving the ISUP initial address message, CN1 queries IMSI or TMSI of the corresponding number through MSRN, and sends paging message to UE1 through AN1 carrying IMSI or TMSI (preferably using TMSI);

408, after receiving the paging message, the UE1 sends a paging response message to the CN1 through AN 1;

409, the CN1 sends a call setup message to the UE1 through AN1, wherein the message carries a calling number for the calling number display of the UE 1;

410, UE1 sends a call confirmation message to CN1 through AN1, where the message carries negotiated bearer capability, and CN1, after receiving the call confirmation message, allocates channel resources for AN1 to establish air interface resources for AN 1;

411, after the air interface resource is established, UE1 sends a ringing message to CN1 through AN1, telling the calling network that the called has rung;

412, CN1 sends an ISUP address full message to GMSC/TMSC;

413, GMSC/TMSC forwards ISUP address full message to other network;

414, after answering, UE1 sends connection message to CN1 through AN 1;

415, after receiving the connection message, CN1 sends an ISUP response message to GMSC/TMSC;

416, forwarding the ISUP response message to other networks by the GMSC/TMSC;

417, after receiving the connect message, CN1 sends a connect confirm message to UE1 through AN 1;

the called flow setup from this UE1 is complete.

The dual-mode dual-standby terminal exists in the existing network, because a user has two different cards and can access different networks, even networks of different operators, the user can have two different MSISDN numbers, the user experience is poor, and for the operators, part of services can be taken away by other operators, and the income of the operators is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a method, a system and a terminal for updating the position, and the dual-mode dual-standby terminal can be accessed to different networks by using the same MSISDN.

In order to solve the above problem, the present invention provides a location updating method, including:

when a dual-mode dual-standby terminal which can use two International Mobile Subscriber Identities (IMSIs) is accessed to a network, selecting one IMSI according to an access type and carrying the IMSI or a Temporary Mobile Subscriber Identity (TMSI) corresponding to the IMSI in a sent first location updating request;

after receiving the first location updating request, the core network device carries the IMSI and the core network device identifier in a second location updating request message sent to a subscription server;

and after receiving the second location updating request message, the subscription server stores or updates the core network equipment identifier corresponding to the IMSI into the core network equipment identifier carried in the second location updating request.

Preferably, the method may also have the following features:

before the dual-mode dual-standby terminal which can use two IMSIs accesses a network, the subscription server stores two sets of service data which are associated with the two IMSIs and respectively correspond to two access types and one MSISDN associated with the two IMSIs;

and after receiving the second location updating request, the subscription server inserts subscription data into the core network device, wherein the subscription data comprises the MSISDN, the IMSI and a set of service data corresponding to the IMSI, or the subscription data comprises the MSISDN, two IMSIs corresponding to the MSISDN and two sets of service data corresponding to the two IMSIs.

Preferably, the method may also have the following features:

the service data comprises a dual mode dual standby capability indication, which is represented by access restriction data or by an extended supplementary service code.

Preferably, the method may also have the following features:

when the dual-mode dual-standby terminal requests to access the core network equipment in a mode other than the dual-mode dual-standby capability indication, the core network equipment rejects the access request of the dual-mode dual-standby terminal according to the received dual-mode dual-standby capability indication.

Preferably, the method may also have the following features:

after the subscription server receives the second location update request message sent by the core network device, the method further includes: and checking whether a core network equipment identifier corresponding to the IMSI in the second location updating request message is stored before, if so, sending a location deleting request message to corresponding core network equipment according to the core network equipment identifier stored before, and deleting subscription data stored in the core network equipment previously accessed by the dual-mode dual-standby terminal under the same IMSI.

Preferably, the method may also have the following features:

the two IMSIs which can be used by the dual-mode dual-standby terminal correspond to two different TMSI respectively, or correspond to one same TMSI.

In order to solve the above problem, the present invention further provides a location updating system, including a dual-mode dual-standby terminal, a core network device, and a subscription server, wherein:

when the dual-mode dual-standby terminal is used for accessing a network, selecting one International Mobile Subscriber Identity (IMSI) from two IMSIs according to an access type, and carrying the IMSI or TMSI corresponding to the IMSI in a sent position updating request;

the core network device is used for carrying the IMSI and the core network device identifier in a second location updating request message sent to a subscription server after receiving the first location updating request;

and the subscription server is used for storing or updating the core network equipment identifier corresponding to the IMSI into the core network equipment identifier carried in the second location updating request after receiving the second location updating request message sent by the core network equipment.

Preferably, the system may also have the following features:

the subscription server is also used for storing two sets of service data which are associated with the two IMSIs and respectively correspond to the two access types and one MSISDN associated with the two IMSIs after the user subscribes the two IMSIs and the two access types; after receiving the second location updating request, inserting subscription data into the core network equipment;

the subscription data includes the MSISDN, the IMSI, and a set of service data corresponding to the IMSI, or the subscription data includes the MSISDN, two IMSIs corresponding to the MSISDN, and two sets of service data corresponding to the two IMSIs.

Preferably, the system may also have the following features:

the core network equipment is used for rejecting the access request of the dual-mode dual-standby terminal according to the received dual-mode dual-standby capability indication when the dual-mode dual-standby terminal requests to access the core network equipment in a mode other than the dual-mode dual-standby capability indication.

Preferably, the system may also have the following features:

the subscription server is further configured to check whether a core network device identifier corresponding to the IMSI in the second location update request message is stored before after receiving the second location update request message sent by the core network device, and if the core network device identifier is stored before, send a delete location request message to the corresponding core network device according to the core network device identifier stored before so as to delete subscription data stored in the core network device previously accessed by the dual-mode dual-standby terminal under the same IMSI.

Preferably, the system may also have the following features:

In order to solve the above problem, the present invention provides a method for implementing a calling service, including:

when the dual-mode dual-standby terminal initiates a calling service, an access type is selected according to the service type of a user, and then the IMSI corresponding to the access type or the TMSI corresponding to the IMSI is used for carrying out the service through the wireless access network corresponding to the access type.

Preferably, the method may also have the following features:

if the dual-mode dual-standby terminal is accessed from the 2G and 3G wireless access networks, selecting a 2G access type when the calling service is a voice service; and when the calling service is the data service, selecting the 3G access type.

If the dual-mode dual-standby terminal is only accessed from the 2G wireless access network, when the calling service is a fax service in a voice service or a data service, selecting a 2G access type; and when the calling service is a video service in the data service, modifying the data service into a voice service, and selecting a 2G access type.

And if the dual-mode dual-standby terminal is only accessed from the 3G wireless access network and the calling service is a voice service or a data service, selecting the 3G access type.

In order to solve the above problem, the present invention provides a method for implementing a called service, which includes:

in the called process of the dual-mode dual-standby terminal user, after receiving a routing query message carrying the bearing capacity and the MSISDN of the current call, the subscription server selects an access type according to the bearing capacity and the user states of the two IMSIs associated with the MSISDN;

the subscription server requests the corresponding core network equipment to allocate a Mobile Station Roaming Number (MSRN) for the IMSI according to the core network equipment identifier corresponding to the IMSI corresponding to the selected access type, and sends the obtained MSRN back to a sender of the routing query message;

and the subscription server stores one MSISDN signed by the dual-mode dual-standby terminal user and two IMSIs associated with each other, and each IMSI corresponds to one access type.

Preferably, the method may also have the following features:

the selecting the access type according to the user states of the two IMSIs associated with the bearing capacity and the MSISDN comprises:

when the bearing capacity of the call is a voice service, when the user state of the IMSI corresponding to the 2G access type is in an attached state, selecting the 2G access type; and when the user state of the IMSI corresponding to the 3G access type is in an attached state, selecting the 3G access type.

Preferably, the method may also have the following features:

the selecting the access type according to the user states of the two IMSIs associated with the bearing capacity and the called MSISDN comprises:

when the bearing capacity of the call is a fax service in a data service, selecting a 3G access type when the user state of the IMSI corresponding to the 3G access type is an attached state; and when the user state of the IMSI corresponding to the 2G access type is in an attached state, selecting the 2G access type.

Preferably, the method may also have the following features:

when the bearing capacity of the call is a video service in a data service, selecting a 3G access type when the user state of the IMSI corresponding to the 3G access type is an attached state; and when the user state of the IMSI corresponding to the 2G access type is in an attached state, modifying the bearing capacity of the call into a voice service, and selecting the 2G access type.

In order to solve the above problem, the present invention provides a subscription server, including: an information management module, a network selection module and a number acquisition module, wherein

The information management module is used for storing one MSISDN signed by the dual-mode dual-standby terminal user and two IMSIs associated with the MSISDN, and each IMSI corresponds to one access type;

the network selection module is used for selecting an access type according to the bearing capacity and the user states of two IMSIs related to the MSISDN after receiving an MAP routing query message carrying the MSISDN and the bearing capacity of the call in a called flow of a dual-mode dual-standby terminal user;

and the number acquisition module is used for requesting corresponding core network equipment to allocate an MSRN for the IMSI according to the core network equipment identifier corresponding to the IMSI corresponding to the selected access type, and sending the obtained MSRN back to a sender of the routing query message.

Preferably, the subscription server may further have the following features:

the network selection module is further to: when the bearing capacity of the call is a voice service, when the user state of the IMSI corresponding to the 2G access type is in an attached state, selecting the 2G access type; and when the user state of the IMSI corresponding to the 3G access type is in an attached state, selecting the 3G access type.

Preferably, the subscription server may further have the following features:

the network selection module is further to: when the bearing capacity of the call is a fax service in a data service, selecting a 3G access type when the user state of the IMSI corresponding to the 3G access type is an attached state; and when the user state of the IMSI corresponding to the 2G access type is in an attached state, selecting the 2G access type.

Preferably, the subscription server may further have the following features:

the network selection module is further to: when the bearing capacity of the call is a video service in a data service, selecting a 3G access type when the user state of the IMSI corresponding to the 3G access type is an attached state; and when the user state of the IMSI corresponding to the 2G access type is in an attached state, modifying the bearing capacity of the call into a voice service, and selecting the 2G access type.

By adopting the invention, the dual-mode dual-standby terminal can access different networks by using the same MSISDN, and the user does not need to select the MSISDN, thereby having good experience.

Drawings

Fig. 1 is a diagram of a conventional network dual access system architecture;

FIG. 2 is a flow chart of a user location update based on an existing network;

FIG. 3 is a flow chart of a caller based on an existing network;

FIG. 4 is a flow chart of a user called over an existing network;

fig. 5 is a schematic diagram of a first network architecture of the communication system of the present invention;

fig. 6 is a flow of implementing location update by a dual-mode dual-standby terminal according to the embodiment of the present invention shown in fig. 5;

fig. 7 is a flow of a third dual-mode dual-standby terminal implementing a calling service according to an embodiment of the present invention;

fig. 8 is a flow of implementing a called service based on the dual-mode dual-standby terminal of fig. 5;

fig. 9 is a schematic diagram of a second network architecture of the communication system of the present invention;

fig. 10 is a flow of implementing location update by the dual mode dual standby terminal according to the embodiment of the present invention shown in fig. 6;

fig. 11 is a flow for implementing a called service based on the dual-mode dual-standby terminal of fig. 9.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The type of the radio access network to which the terminal accesses is referred to as an access type, and sometimes the dual-mode dual-standby terminal is referred to as a terminal.

Example one

In this embodiment, a user of the dual-mode dual-standby terminal may use 2 IMSI numbers to access two types of radio access networks simultaneously, and the two IMSIs may correspond to the same MSISDN, but are not limited thereto. After the subscriber signs up for two access types, there are two IMSIs (IMSI1 and IMSI2), each IMSI corresponding to one access type. The subscription server, such as HLR/HSS, stores at least the MSISDN of the subscriber and two corresponding IMSIs, as well as two sets of service data corresponding to the two IMSIs, respectively. In the present invention, the correspondence between each IMSI and the access type is fixed.

Wherein, the signing data packet MSISDN, IMSI and service data.

The communication system of the present embodiment adopts a network architecture of a core network system shown in fig. 5. As shown in fig. 5, the communication system includes:

and the terminal UE is dual-mode and dual-standby.

The first radio access network AN1, in this embodiment, takes GERAN as AN example, and records the access type when the terminal accesses from AN1 using the IMSI1 as 2G.

The second radio access network AN2, in this embodiment, takes UTRAN as AN example, and records the access type of the terminal accessing from AN2 using IMSI2 as 3G.

In this embodiment, the second radio access network is an evolved network of the first radio access network, and the access capability of the second radio access network is stronger than that of the first radio access network. The first radio access network and the second radio access network of the present invention are not limited thereto, and may be CDMA and CDMA2000, GSM and TD-SCDMA, for example.

The first core network devices CN1 and CN2 are used to support AN1 access, in this embodiment, CN1 and CN2 are both composed of CS network elements MSC and VLR supporting GERAN access.

And second core network devices CN3 and CN4, configured to support AN2 access, in this embodiment, CN3 and CN4 are both made up of MSCS and MGW supporting UTRAN access.

Gateway offices (GMSC) are mainly used for routing addressing, and tandem offices (TMSC) are used for tandem to other networks.

The subscription server (home location register HLR/home subscriber server HSS) is used for storing subscription data such as service data, IMSI, MSISDN and the like, and supporting and storing the subscription data used when the dual-mode dual-standby terminal is accessed from AN1 and AN 2;

other networks, mainly other mobile networks or fixed networks.

The functions of the AN1, AN2, CN1, CN2, CN3, CN4, GMSC/TMSC and other networks of the communication system are consistent with existing network systems.

The dual-mode dual-standby terminal of the embodiment can simultaneously use two IMSIs to access two wireless access networks. Structurally, the mobile phone can be provided with two card slots, wherein one card slot is used for inserting a subscriber identity module card of 2G IMSI, and the other card slot is used for inserting a subscriber identity module card of 3G IMSI, but the mobile phone can also be a card slot, and one subscriber identity module card written with two IMSIs is inserted when the mobile phone is used.

When the dual-mode dual-standby terminal accesses the network, one IMSI is selected according to the access type and the IMSI or the TMSI corresponding to the IMSI is carried in the sent location updating request.

The core network devices CN1 and CN3 in this embodiment carry the currently used IMSI and the core network device identifier when sending the MAP location update request message to the subscription server (HLR/HSS) after receiving the location update request sent by the dual-mode dual-standby terminal. The core network device identifier of this embodiment includes an MSC address and a VLR number.

For the present embodiment, CN1 and CN3 correspond to one access type, CN1 corresponds to 2G, and CN3 corresponds to 3G, respectively.

After the user signs two access types, the signing server at least stores the MSISDN and two corresponding IMSIs used by the user, and two sets of service data respectively corresponding to the two IMSIs, wherein the two IMSIs respectively correspond to the two access types. After receiving the MAP location update request message sent by the core network device, the subscription server establishes the corresponding relationship between the IMSI and the core network device identifier according to the IMSI and the core network device identifier in the message or updates the corresponding relationship established before, inserts a set of service data corresponding to the IMSI in the message into the core network device for storage, and sets the user state of the IMSI in the message to be an attachment state after the location update is successful.

After receiving the MAP-containing location update request message sent by the core network device, the subscription server also checks whether a core network device identifier corresponding to the IMSI in the message is stored before, and if so, sends a MAP deletion location request message to the corresponding core network device according to the core network device identifier stored before to delete subscription data stored in the core network device to which the terminal has previously accessed under the same IMSI.

The process of implementing location update by the dual-mode dual-standby terminal in this embodiment includes:

step one, when a dual-mode dual-standby terminal of two IMSIs can be used for accessing a network, one IMSI is selected according to an access type, and the IMSI or TMSI corresponding to the IMSI is carried in a sent first location updating request;

step two, after receiving the first location updating request, the core network device carries the IMSI and the core network device identifier in a second location updating request message sent to a subscription server;

based on the network architecture of this embodiment, the location update request sent by the core network device to the subscription server uses the MAP location update request message. However, the present invention is not limited to this, and other messages defined by the corresponding protocol may be used based on other network architectures.

Step three, after receiving the second MAP location update request message, the subscription server stores or updates the core network device identifier corresponding to the IMSI to the core network device identifier carried in the second location update request;

step four, the subscription server inserts subscription data into the core network device, wherein the subscription data comprises the MSISDN, the IMSI and a set of service data corresponding to the IMSI.

The service data sent by the subscription server to the core network device may further include a dual-mode dual-standby capability indication of the user, where the dual-mode dual-standby capability indication may be represented by Access restriction data (ASD) or may be represented by an extended supplementary service code.

When the dual-mode dual-standby terminal requests to access the core network device in a mode other than the dual-mode dual-standby capability indication, the core network device may reject the access request of the dual-mode dual-standby terminal according to the received dual-mode dual-standby capability indication of the user.

In addition, after receiving the MAP location update request message sent by the core network device, the subscription server checks whether a core network device identifier corresponding to the IMSI in the second location update request message is stored before, and if so, sends a MAP deletion location request message to the corresponding core network device according to the core network device identifier stored before, and deletes subscription data stored in the core network device previously accessed by the dual-mode dual-standby terminal under the same IMSI.

The location update procedure described above will be described in detail with reference to fig. 6.

601, selecting IMSI1 corresponding to subscription or TMSI1 corresponding to IMSI1 for accessing process by the dual-mode dual-standby terminal UE according to the network coverage condition of AN1 and the mode that AN1 is GERAN access;

602, the UE initiates a location update request message to CN1 through AN access network AN1, where the message carries a type of the location update, and indicates whether the location update is normal or periodic, or IMSI is attached, the message also carries IMSI1 selected in step 601, or IMSI1 corresponds to TMSI1, the message also includes location area identifier LAI, and the message includes user class 1(Mobile Station class 1) or user class 2(Mobile Station class 2);

603, the CN1 realizes the authentication process for the IMSI1 in the UE, and the detailed description refers to the steps 202-205 in the background technology;

604, after the IMSI1 of the UE1 is authenticated successfully, sending a Mobile Application Part (MAP for short) location update request message (MAP update location) to the HLR/HSS, where the message carries a user identifier IMSI1 and a CN1 identifier, that is, an MSC address and a VLR number;

605, the HLR/HSS checks whether the core network device identifier corresponding to the IMSI1 is empty, if so, directly stores the core network device identifier (MSC address and VLR number) corresponding to the CN1, and if not, executes the subsequent steps 606 and 607, and stores the MSC address and VLR number corresponding to the CN 1;

606, in step 605, HLR/HSS checks that the core network device identifier corresponding to IMSI1 is not empty, and the stored MSC address and VLR number correspond to CN2 network, which means that the user roams from CN2 to CN1 network, HLR/HSS sends a MAP delete location request message (MAP cancel location) to CN2, where the message carries user identifier IMSI 1;

607, CN2 deletes the stored subscription data, and sends back MAP delete position request response message to HLR/HSS;

608, HLR/HSS sends a MAP insert Subscriber DATA message (MAP insert Subscriber DATA) to CN1, where the message carries Service DATA of a Subscriber and a Mobile Subscriber number (Mobile Subscriber international ISDN/PSTN number, MSISDN for short), where ISDN is an Integrated Service Digital Network and is an abbreviation of an Integrated Service Digital Network, PSTN is a Public Switched Telephone Network and is an abbreviation of a Public Switched Telephone Network, and the message also carries a Subscriber number 1, and the message may also carry an indication of dual mode dual standby capability of the Subscriber;

the dual mode dual standby capability indication of the user may be represented by Access restriction data (ASD), that is, the ASD corresponding to the IMSI1 is an disallowed UTRAN ("UTRAN all") identifier; in addition, the supplementary service code can be expressed by an extended supplementary service code, and the supplementary service code corresponding to the IMSI1 is '2G only';

609, after receiving the MAP inserting user data message, CN1 saves the user service data and user number IMSI1 and MSISDN, and returns the MAP inserting user data response message to HLR/HSS, wherein the message can carry the access mode ("2G"), and the HLR/HSS saves the access mode after receiving the message;

if the IMSI1 is accessed to the CN1 through AN2 or other 3G means, the CN1 directly rejects the access request.

610, HLR/HSS sends back MAP location update request response message to CN1, and sets the user state of IMSI1 as attachment state;

611, as described with reference to background art 212-213;

step 611 is an optional procedure and the encryption process may not be performed depending on the device conditions of the operator.

612, CN1 sends a location update confirm message to UE through AN1, which may contain TMSI reallocation command message if the network needs to reallocate TMSI, which carries the new TMSI1 allocated by the network;

if CN1 supports dual mode dual standby terminal access, the message may also carry an indication of the capability of the network to support dual mode dual standby.

613, after the UE saves the new TMSI1, it sends a TMSI reallocation complete message to CN 1.

If there is no TMSI reallocation command message in step 612, the UE completes location update access to CN1 through AN1 in step 612, and if it does, the UE completes location update access to CN1 through AN1 in step 613.

614, the UE selects IMSI2 or TMSI2 corresponding to IMSI2 to perform similar steps 602 to 613 in AN2, CN3, CN4 and HLR/HSS, and completes the location update process of IMSI2 or TMSI2 in CN3, wherein the dual-mode dual-standby capability of the user indicates that Access Restriction Data (ARD) inserted with service Data is set as not capable of accessing GERAN ("GERAN notify") or the supplementary service code is only accessing 3G ("3G notify")

The dual-mode dual-standby terminal accesses CN1 through AN1 or accesses CN3 through AN2 in no sequence, CN1 and CN3 store the same MSISDN number of the user after the access is successful, two new TMSI are stored in the dual-mode dual-standby terminal, TMSI1 corresponds to IMSI1, and TMSI2 corresponds to IMSI 2.

Example two

In this embodiment, a user of the dual-mode dual-standby terminal may use 2 IMSI numbers to access two types of radio access networks simultaneously, and the two IMSIs may correspond to the same MSISDN, but are not limited thereto. After the subscriber signs up for two access types, there are two IMSIs (IMSI1 and IMSI2), each IMSI corresponding to one access type. The subscription server, such as HLR/HSS, stores at least the MSISDN of the subscriber and two corresponding IMSIs, as well as two sets of service data corresponding to the two IMSIs, respectively. The correspondence of each IMSI to an access type is fixed.

The communication system of the present embodiment adopts a network architecture of a common core network system shown in fig. 9. As shown in fig. 9, the communication system includes:

and the terminal UE is dual-mode and dual-standby.

other networks, mainly other mobile networks or fixed networks.

The communication system is consistent with the existing network system in functions of AN1, AN2, CN4, GMSC/TMSC and other networks, wherein CN4 may be modified in the same way as CN3 or not.

The core network device CN3 of this embodiment, after receiving the location update request sent by the dual-mode dual-standby terminal, carries the currently used IMSI and the core network device identifier when sending the MAP location update request message to the subscription server (HLR/HSS). The core network device identifier of this embodiment includes an MSC address and a VLR number.

For the present embodiment, CN3 corresponds to two access types, 2G and 3G, with AN1 and AN2 both accessing CN 3.

After the user signs two access types, the signing server at least stores the MSISDN and two corresponding IMSIs used by the user, and two sets of service data respectively corresponding to the two IMSIs, wherein the two IMSIs respectively correspond to the two access types. After receiving the MAP location update request message sent by the core network device, the subscription server establishes a corresponding relationship between the IMSI and the core network device identifier according to the IMSI and the core network device identifier in the message or updates the corresponding relationship established before, inserts a set of subscription data or all subscription data corresponding to the IMSI in the message into the core network device for storage, and sets the user state of the IMSI in the message to an attachment state after the location update is successful.

step one, when a dual-mode dual-standby terminal of two IMSIs can be used for accessing a network, one IMSI is selected according to an access type and the IMSI or TMSI corresponding to the IMSI is carried in a sent position updating request;

the two IMSIs which can be used by the dual-mode dual-standby terminal can respectively correspond to two different TMSI (temporary Mobile subscriber identity) and can also correspond to one same TMSI;

step two, after the core network device receives the first location updating request, the IMSI and the core network device identifier are carried in a second location updating request message sent to a subscription server;

step four, the subscription server inserts subscription data into the core network device, wherein the subscription data includes the MSISDN, the IMSI and a set of service data corresponding to the IMSI, or the subscription data includes the MSISDN, two IMSIs corresponding to the MSISDN and two sets of service data corresponding to the two IMSIs.

When the dual-mode dual-standby terminal uses one IMSI to access the network, if the signed data inserted by the signing server carries the MSISDN corresponding to the IMSI in the MAP location update request message, two IMSIs corresponding to the MSISDN and two sets of service data corresponding to the two IMSIs, when the dual-mode dual-standby terminal uses another IMSI to access the network, the signing server does not need to insert the signed data into the core network equipment, namely, does not need to send a MAP inserting user data message to the core network equipment.

The location update procedure described above will be described in detail with reference to fig. 10.

1001, the dual-mode dual-standby terminal initiates a location update request message to CN3 through AN access network AN1 according to a network coverage situation, where the message carries a type of the location update, and indicates whether the location update is ordinary or periodic, or IMSI is attached, and the message also carries a dual-mode dual-standby terminal IMSI1, or TMSI1 corresponding to IMSI1, and the message also includes a location area identifier LAI, and the message includes a user class 1(Mobile Station Classmark 1) or a user class 2(Mobile Station Classmark 2);

1002, the CN3 implements an authentication process for the IMSI1 in the UE, which is specifically described with reference to steps 202 to 205 in the background art;

if CN3 does not know TMSI1 and the UE stores two TMSIs, CN3 can send an identification request message to the UE requesting IMSI1 corresponding to TMSI1 in the UE; if CN3 does not know TMSI1 and the UE stores one TMSI, CN3 may send an identity request message to the UE requesting IMSI1 corresponding to the access mode in the UE.

1003, after the IMSI1 of the UE is authenticated successfully, CN3 sends a Mobile Application Part (MAP for short) location update request message (MAP update location) to HLR/HSS, where the message carries a user identifier IMSI1 and a CN3 identifier, that is, an MSC address and a VLR number;

1004, the HLR/HSS checks the MSC address and VLR number corresponding to IMSI1, if empty, directly stores the MSC address and VLR number corresponding to CN3 and corresponding IMSI1, if not empty, performs the subsequent step 1005, and stores the MSC address and VLR number and IMSI1 corresponding to CN3, the HLR/HSS checks that the MSC address and VLR number corresponding to IMSI1 are not empty, if the stored MSC address and VLR number correspond to CN4 network, indicating that the user roams from CN4 to CN3 network, the HLR/HSS sends a MAP delete location request message (cancalllocation) to CN4, the message carrying user identification IMSI 1;

1005, if the CN4 deletes the subscription data corresponding to the IMSI1, after deleting the subscription data, returning a MAP delete location request response message to the HLR/HSS;

1006, HLR/HSS sends a MAP insert Subscriber DATA message (MAP insert Subscriber DATA) to CN3, where the message carries service DATA (i.e. subscription DATA of 2G) corresponding to the access mode and a Mobile Subscriber number (Mobile Subscriber International ISDN/PSTNnumber, MSISDN for short), where ISDN is an Integrated service digital Network and is an abbreviation of Integrated service digital Network, PSTN is a Public switched telephone Network and is an abbreviation of Public switched telephone Network, and the message also carries a Subscriber number IMSI 1;

here, the service Data may include an indication of dual mode dual standby capability of the user, which may be carried by Access Restriction Data (ASD), that is, the ASD corresponding to the IMSI1 is an disallowed UTRAN ("UTRAN not allowed") identifier, the ASD corresponding to the IMSI2 is an disallowed GERAN ("GERAN not allowed"), and the service Data may also be represented by an extended supplementary service code, where the IMSI1 corresponds to the supplementary service code "2G only", and the IMSI2 corresponds to the supplementary service code "3G only"

Here, all subscription data (i.e. subscription data of 2G and 3G) of the dual mode dual standby terminal may be inserted at the same time, so that the case of access from 3G does not have this step.

1007, CN3 stores user service data and user number IMSI1 and MSISDN after receiving MAP insert user data message, and returns MAP insert user data response message to HLR/HSS, said message may also carry access capability 2G;

if step 1006 inserts all subscription data of the dual mode dual standby terminal, the CN3 stores one MSISDN and two IMSIs according to the dual mode dual standby capability indication.

The CN3 can reject the user to access to the CN3 in other access modes according to the user dual-mode dual-standby capability indication of the user service data, that is, reject the IMSI1 to access from the AN2, and reject the IMSI2 to access from the AN 1.

1008, the HLR/HSS sends a MAP location update request response message back to CN 3;

1009, described with reference to background art 212-213;

step 1009 is an optional procedure, and the encryption procedure may not be performed according to the device condition of the operator.

1010, CN3 sends a location update confirm message to UE through AN1, if the network needs to reallocate TMSI, the message may contain a TMSI reallocation command message, the TMSI reallocation command carries a new TMSI1 allocated by the network, the message may also carry AN indication that the network supports dual mode dual standby capability;

1011, after the UE saves the new TMSI1, it sends a TMSI reallocation complete message to CN 3.

If there is no TMSI reallocation command message in step 1010, the UE completes the location update to CN1 through AN1 in step 1010, and if it does, the UE completes the location update to CN1 through AN1 in step 1011.

The dual-mode dual-standby terminal completes 2G access, and the following steps complete 3G access.

S1001, the dual-mode dual-standby terminal initiates a location update request message to CN3 through a wireless access network AN2 according to the network coverage situation, the message carries the type of the location update, and represents the common location update or the periodic location update, or IMSI attachment, the message also carries the dual-mode dual-standby terminal IMSI2, or TMSI2 corresponding to the IMSI2, the message also contains a location area identifier LAI, and the message contains a user class 1(Mobile Station Classmark 1) or a user class 2(Mobile Station Classmark 2);

s1002, the CN3 realizes an authentication process for the IMSI3 in the UE, and the specific description refers to the steps 202-205 in the background technology;

if CN3 does not know TMSI2 and the UE stores two TMSIs, CN3 can send an identification request message to the UE requesting IMSI2 corresponding to TMSI2 in the UE; if CN3 does not know TMSI1 and the UE stores one TMSI, CN3 may send an identity request message to the UE requesting IMSI2 corresponding to the access mode in the UE.

S1003, after the IMSI2 of the UE is authenticated successfully, CN3 sends a Mobile Application Part (MAP) location update request message (MAP UPDATELOCATION) to HLR/HSS, wherein the message carries a user identifier IMSI2 and a CN3 identifier, namely, an MSC address and a VLR number;

s1004, the HLR/HSS checks the MSC address and VLR number corresponding to IMSI2, if the MSC address and VLR number corresponding to CN3 and IMSI2 corresponding to the MSC address and VLR number are directly saved, if the MSC address and VLR number are not empty, the subsequent step S1005 is executed, and the MSC address and VLR number corresponding to CN3 and IMSI2 are saved; the HLR/HSS checks the MSC address and VLR number corresponding to IMSI2, and the stored MSC address and VLR number correspond to CN4 network, which means that the user roams from CN4 to CN3 network, and then the HLR/HSS sends MAP delete LOCATION request message (MAP CANCEL LOCATION) to CN4, wherein the message carries user identification IMSI 2;

s1005, if the CN4 deletes the subscription data corresponding to the IMSI2, after deleting the subscription data, returning a MAP delete location request response message to the HLR/HSS;

since CN4 in steps S1004 and S1005 may be different from CN4 in steps 1004 and 1005 but another network access due to the difference between 3G coverage and 2G coverage, the MSC address and VLR number of the HLR/HSS under 2G access and 3G access saved before location update may not be the same.

S1006, HLR/HSS sends MAP insert user DATA message (MAP INSERTS SUBSCRIBER DATA) to CN3, said message carries Service DATA of user corresponding to access mode (i.e. user Service DATA of 3G) and Mobile Subscriber number (MSISDN, for short), wherein ISDN is Integrated Service Digital Network (ISDN), PSTN is Public Switched Telephone Network (PSTN), for short, Public Switched Telephone Network (PUBLIC SWITCHED TELEPHONE NETWORK), said message also carries IMSI 1;

the user service Data may include a dual-mode dual-standby capability indication of the user, where the dual-mode dual-standby capability indication of the user may be carried by Access Restriction Data (ASD), that is, the ASD corresponding to the IMSI1 is an disallowed UTRAN ("UTRAN not allowed") identifier, the ASD corresponding to the IMSI2 is a disallowed GERAN ("GERAN not allowed"), and may also be represented by an extended supplementary service code, where the IMSI1 corresponds to the supplementary service code "2G only", and the IMSI2 corresponds to the supplementary service code "3G only"

S1007, CN3 stores user service data after receiving MAP insert user data message, CN3 also stores IMSI1 and IMSI2 under MSISDN according to user dual-mode dual-standby ability user number IMSI2 and MSISDN, and returns MAP insert user data response message to HLR/HSS, said message can also carry access ability 3G;

If all the subscription data is inserted in step 1006, steps S1006 to S1007 do not need to be executed;

s1008, the HLR/HSS sends back a MAP location update request response message to the CN 3;

s1009, described with reference to 212 to 213 of the background art;

step S1009 is an optional procedure, and the encryption procedure may not be performed according to the device situation of the operator.

S1010, CN3 sends a location update confirmation message to UE through AN1, if the network needs to reallocate TMSI, the message can contain a TMSI reallocation command message, the TMSI reallocation command carries a new TMSI2 allocated by the network, and the message can also carry AN ability indication that the network supports dual mode and dual standby;

CN3 in order to save TMSI number resources, the allocated new TMSI2 may be the same as the allocated new TMSI 1.

S1010, after the UE saves the new TMSI2, the UE sends a TMSI reallocation completion message to CN 3.

If there is no TMSI reallocation command message at step S1010, the UE completes location update access to CN1 through AN1 at step S1010, and if it does, the UE completes location update access to CN1 through AN1 at step S1011.

The dual-mode dual-standby terminal accesses CN3 through AN1 or accesses CN3 through AN2 in no sequence, two new TMSIs are stored in the dual-mode dual-standby terminal, TMSI1 corresponds to IMSI1, TMSI2 corresponds to IMSI2, and the core network CN3 can also allocate one same new TMSI simultaneously in order to save TMSI number resources.

EXAMPLE III

The embodiment mainly relates to how a dual-mode dual-standby terminal selects a wireless access network for service according to the service type and the access condition. The present embodiment may be based on the network architecture of the core-division network system shown in fig. 5, or may be based on the network architecture of the core-sharing network system shown in fig. 9.

When the dual-mode dual-standby terminal initiates a calling service, an available (registered) access type is selected according to the service type of a user, and then the IMSI corresponding to the access type or the TMSI corresponding to the IMSI is used to perform the service through the wireless access network corresponding to the access type.

If the dual-mode dual-standby terminal is accessed from the 2G and 3G wireless access networks, when the calling service is the voice service, selecting the 2G access type; and when the calling service is a data service, such as a fax service and a video service, selecting the 3G access type.

If the dual-mode dual-standby terminal is only accessed from the 2G wireless access network, when the calling service is a fax service in a voice service or a data service, the 2G access type is selected; and when the calling service is a video service in the data service, modifying the data service into a voice service, and selecting a 2G access type.

If the dual-mode dual-standby terminal is only accessed from the 3G wireless access network, the 3G access type is selected no matter whether the calling service is a voice service or a data service.

The following describes in detail the process of implementing the calling service by the dual-mode and dual-standby terminal according to this embodiment with reference to fig. 7.

701, the dual-mode dual-standby terminal selects a corresponding IMSI or a TMSI corresponding to the IMSI to access to a corresponding network for service according to the service type and the access condition, and preferentially selects the IMSI1 or the TMSI1 to access to the CN1 from AN1 when the calling service is a voice service; when the calling service is a fax service in a data service, the access from AN2 to CN3 by IMSI2 or TMSI2 is preferentially selected; when the calling service is a video service of a data service, the access from AN2 to CN3 is selected as IMSI2 or TMSI2, if the dual-mode dual-standby terminal is not in the coverage of AN2, the video service is modified into a voice service, and the access from AN1 to CN1 is selected as IMSI1 or TMSI 1.

702 to 712, described with reference to the background art 301 to 311.

And finishing the calling establishing process of the dual-mode dual-standby terminal.

Example four

The communication system of this embodiment may adopt a network architecture of a core-division network system shown in fig. 5, or may adopt a network architecture of a common-core network system shown in fig. 9. The radio access network and the core network device are not limited to the radio access network and the core network device of GSM and WCDMA, such as CDMA and CDMA2000, or the radio access network and the core network device of GSM and TD-SCDMA, etc. As for the called-related processing, the functions of the subscription server, such as HLR/HSS, need to be upgraded to select the called network according to the bearer capability and subscriber status of the call. The processing logic associated with the called party by other network elements such as the terminal, radio access network, core network equipment, GMSC/TMSC, etc. may be the same as in the prior art.

The subscription server of this embodiment includes:

and the information management module is used for storing one MSISDN signed by the dual-mode dual-standby terminal user and two IMSIs associated with the MSISDN, and the two IMSIs respectively correspond to different access types.

In this embodiment, the one-to-one correspondence between the two IMSIs and the two access types is fixedly set after the user signs a subscription, and is not updated.

And the network selection module is used for selecting an access type according to the bearing capacity and the user states of the two IMSIs related to the MSISDN after receiving a routing query message carrying the MSISDN and the bearing capacity of the call in a called flow of the dual-mode dual-standby terminal user.

And the number acquisition module is used for requesting the corresponding core network equipment to allocate an MSRN for the IMSI according to the core network equipment identifier corresponding to the selected access type, and returning the obtained MSRN to the sender of the MAP routing query message.

Wherein,

if the user states of the two IMSIs are not in the attached state, the network selection module can reject the call. If the user status of at least one IMSI is attached, the following method may be selected:

when the bearing capacity of the call is a voice service, when the user state of the IMSI corresponding to the 2G access type is in an attached state, selecting the 2G access type; when the user state of the IMSI corresponding to the 3G access type is in an attached state, selecting the 3G access type;

when the bearing capacity of the call is a fax service in a data service, selecting a 3G access type when the user state of the IMSI corresponding to the 3G access type is an attached state; when the user state of the IMSI corresponding to the 2G access type is in an attached state, selecting the 2G access type;

The called process of the dual-mode dual-standby terminal is different from the existing process mainly in the processing logic of the subscription server, and includes:

step one, one MSISDN signed by a dual-mode dual-standby terminal user stored by a signing server is associated with two IMSIs, and each IMSI corresponds to one access type;

for the embodiment, after the user signs up, the one-to-one correspondence between the two IMSIs and the two access types is fixedly set, and no update is performed.

Step two, in the called flow of the dual-mode dual-standby terminal, after receiving a routing query message carrying the current call bearing capacity and MSISDN, the subscription server selects an access type according to the bearing capacity and the user states of the two IMSIs associated with the MSISDN;

when the user states of the two IMSIs are both in the attached state, the used access type can be determined according to the carrying capacity, and the core network equipment identifier corresponding to the IMSI corresponding to the access type is selected. The specific selection is as described above.

And step three, the subscription server requests the corresponding core network equipment to allocate an MSRN for the IMSI according to the core network equipment identifier corresponding to the IMSI corresponding to the selected access type, and sends the obtained MSRN back to the sender of the MAP route query message to continue the subsequent called process.

Based on the network architecture of the core network approach of fig. 5, the core network devices corresponding to two IMSIs associated with the same MSISDN are located in two different core networks. In another embodiment, based on the network architecture in the co-core network manner shown in fig. 9, it is easy to understand that the above steps included in the called procedure are the same, but the core network devices corresponding to the two IMSIs are located in the same core network.

The following describes in detail a procedure for implementing the called service by the dual-mode dual-standby terminal based on the architecture of fig. 5 with reference to fig. 8.

801 to 802 are the same as the steps 401 and 402 of the prior art.

803, the HLR/HSS finds the saved subscriber states corresponding to the 2 IMSIs associated to the called number MSISDN and selects the access type in the following way:

if the user states of 2 IMSIs corresponding to the called number are all in an attached state, namely, the MSC address and VLR number of CN1 under the 2G access type are stored, and the MSC address and VLR number of CN3 under the 3G access type are stored, the HLR/HSS selects the access type according to the bearing capacity in the MAP routing query message: if the bearing capacity is voice service, the 2G access type is preferentially selected, if the bearing capacity is fax service in data service, the 3G access type is preferentially selected, and if the bearing capacity is video service in data service, only the 3G access type (corresponding to the MSC address and VLR number of CN 3) is selected.

If only the user state of the IMSI corresponding to the 3G access type in the 2 IMSIs corresponding to the called number is in the attached state, all services select the 3G access type.

If the user state of only the IMSI corresponding to the 2G access type in the 2 IMSIs corresponding to the called number is in an attached state, for a fax service in a voice service and a data service, selecting the 2G access type (corresponding to the MSC address and the VLR number of CN 1), for a video service in the data service, judging whether the terminal has the capability of modifying the data service into the voice service, if so, selecting the 2G access type (corresponding to the MSC address and the VLR number of CN 1), and if not, rejecting the video call.

804, the HLR/HSS selects a called network according to the step 803, where the bearer capability is only taken as a voice service, and the rest of data services are analogized, and if it is found that the 2G access type stored in the HLR/HSS and in which the user state is the active state corresponds to the MSC address and VLR number of CN1, send a MAP providing roaming number request message to CN1, where the message carries the called IMSI1 in the 2G access type, and the message also carries the MSC number of CN 1;

the subsequent process refers to steps 404-417 in the called process in the prior art.

And finishing the establishment of the called voice service flow of the dual-mode dual-standby terminal UE. The called data service flow HLR/HSS selects CN3 to obtain roaming number, and pages the dual-mode dual-standby terminal UE from AN2, the whole process is similar, and the description is not repeated.

The following describes in detail a procedure for implementing the called service by the dual-mode dual-standby terminal based on the architecture of fig. 9 with reference to fig. 11.

1101 to 1102 are the same as steps 401 and 402 of the prior art.

1103, the HLR/HSS finds the saved subscriber states corresponding to the 2 IMSIs associated with the called number MSISDN, and selects the access type in the following way:

if the user states of 2 IMSIs corresponding to the called number are all in an attached state, namely, the MSC address and VLR number of CN3 under the 2G access type are stored, and the MSC address and VLR number of CN3 under the 3G access type are stored, the HLR/HSS selects the access type according to the bearing capacity in the MAP routing query message: if the bearing capacity is voice service, the 2G access type is preferentially selected, if the bearing capacity is fax service in data service, the 3G access type is preferentially selected, and if the bearing capacity is video service in data service, only the 3G access type is selected.

If only the user state of the IMSI corresponding to the 2G access type in the 2 IMSIs corresponding to the called number is in an attached state, selecting the 2G access type for the fax service in the voice service and the data service; and for the video service in the data service, judging whether the terminal has the capability of modifying the data service into the voice service, if so, selecting 2G access, and if not, rejecting the video call.

1104, the HLR/HSS querying, according to the access type selected in step 1103, that is, taking the bearer capability as a voice service only, and analogizing other data services, that the 2G access type stored in the HLR/HSS and in which the user state is the active state corresponds to the MSC address and VLR number of CN3, sending a MAP providing roaming number request message to CN3, where the message carries the called IMSI1 in the 2G access type, and the message also carries the MSC number of CN 3;

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method of location updating, comprising:

2. The method of claim 1,

before the dual-mode dual-standby terminal which can use two IMSIs accesses a network, the subscription server stores two sets of service data which are associated with the two IMSIs and respectively correspond to two access types and one mobile subscriber number (MSISDN) associated with the two IMSIs;

3. The method of claim 2,

4. The method of claim 3, wherein the method further comprises:

5. The method of claim 1,

6. The method of claim 1,

7. A location updating system is characterized by comprising a dual-mode dual-standby terminal, a core network device and a subscription server, wherein:

8. The system of claim 7,

the subscription server is further configured to store two sets of service data associated with the two IMSIs and respectively corresponding to the two access types and one mobile subscriber number (MSISDN) associated with the two IMSIs after the user subscribes to the two IMSIs and the two access types; after receiving the second location updating request, inserting subscription data into the core network equipment;

9. The system of claim 8,

10. The system of claim 9,

11. The system of claim 7,

12. The system of claim 7,