CN102421084A

CN102421084A - Method and system for realizing position update by dual-mode dual-standby terminal

Info

Publication number: CN102421084A
Application number: CN2010105057065A
Authority: CN
Inventors: 曲爱妍; 王刚; 游世林; 王志海; 刘建业; 周宇翔
Original assignee: ZTE Corp
Current assignee: Changshu Intellectual Property Operation Center Co ltd; Guangdong Gaohang Intellectual Property Operation Co ltd
Priority date: 2010-09-28
Filing date: 2010-09-28
Publication date: 2012-04-18
Anticipated expiration: 2030-09-28
Also published as: CN102421084B

Abstract

The invention discloses a method and system for realizing position update by a dual-mode dual-standby terminal. The method comprises the following steps of: selecting an access type when one IMSI (International Mobile Subscriber Identification Number) can be used for accessing a dual-mode dual-standby terminal access network of two networks, and carrying the IMSI or TMSI (Temporary Mobile Subscriber Identity) in a transmitted first position update request, wherein the TMSI and the IMSI are corresponding to the access type; carrying the IMSI, a core network device identification and the access type information accessed this time in a second position update request transmitted to a signed server after a core network device accessed with the dual-mode dual-standby terminal receives the first position update request; and saving or updating the core network device identification corresponding to the IMSI and the access type to be the core network device identification carried in the second position update request after the signed server receives the second position update request. According to the method and the system for realizing the position update by the dual-mode dual-standby terminal, disclosed by the invention, the dual-mode dual-standby terminal can access different networks by the same MSISDN (Mobile Subscriber International ISDN/PSTN Number).

Description

Method and system for realizing position updating of dual-mode dual-standby terminal

Technical Field

The invention relates to the field of communication, in particular to a method and a system for realizing position updating of a dual-mode dual-standby terminal.

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 UPDATE LOCATION) to HLR/HSS, wherein the message carries the user identifier IMSI and the CN1/CN3 identifiers, namely, the MSC address and the 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 and a Mobile Subscriber number (Mobile Subscriber International ISDN/PSTN number, MSISDN for short) signed by a Subscriber, 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 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 ISDN user part (ISDN user part, ISUP for short) initial address message 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.

In addition, in the current communication system, during the continuous evolution process, the evolved network, such as the 3G network, has better quality and service, but temporarily cannot catch up with the traditional network, such as the 2G network, in coverage, and at the same time, the user amount of the two networks is not balanced, and the number of users using the 3G network is small, which is not favorable for the full utilization of resources. For a dual-mode dual-standby terminal that can access a traditional network and an evolution network simultaneously, how to provide better communication quality and service for users and balance the user quantity of the network on the premise of ensuring normal communication of the users is also a problem to be solved.

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 and a system for realizing position updating of a dual-mode dual-standby terminal, wherein 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 method for implementing location update by a dual-mode dual-standby terminal, which comprises:

when an International Mobile Subscriber Identity (IMSI) can be used for accessing a dual-mode dual-standby terminal access network of two networks, selecting an access type, and carrying the IMSI or a Temporary Mobile Subscriber Identity (TMSI) in a sent first location updating request, wherein the TMSI corresponds to the IMSI and the access type;

after receiving the first location updating request, the core network equipment accessed by the dual-mode dual-standby terminal carries the IMSI, the core network equipment identifier and the access type information accessed this time in a second location updating request sent to a subscription server;

and after receiving the second location updating request, the subscription server stores or updates the core network equipment identifier corresponding to the IMSI and the access type 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 accesses a network, two sets of service data which are associated with the IMSI and respectively correspond to two access types are stored in the subscription server;

after the signing server receives the second location updating request, the signing server inserts signing data into the core network equipment;

the subscription data includes the IMSI, the MSISDN corresponding to the IMSI, and a set of service data corresponding to the access type of the current access, or includes the IMSI, the MSISDN corresponding to the IMSI, and all service data corresponding to the IMSI.

Preferably, the method may also have the following features:

after receiving the second location updating request, the subscription server stores the core network device identifier corresponding to the IMSI and the access type, and then sends a location deletion request to the corresponding core network device according to the previously stored core network device identifier corresponding to the IMSI and the access type, and then updates the core network device identifier corresponding to the IMSI and the access type to the core network device identifier carried in the second location updating request.

Preferably, the method may also have the following features:

the two access types of the dual-mode dual-standby terminal refer to access from a global system for mobile communication radio access network (GERAN) for enhancing data rate and access from a Universal Terrestrial Radio Access Network (UTRAN);

the core network equipment accessed by the dual-mode dual-standby terminal refers to a mobile switching center/visitor location register (MSC/VLR) accessed from GERAN, and a mobile interaction center server/media gateway (MSCS/MGW) accessed from UTRAN; or MSCS/MGW accessed from GERAN and UTRAN.

Preferably, the method may also have the following features:

the indication information of the dual mode dual standby capability is indicated by using a version field in a user category 2.

Preferably, the method may also have the following features:

the two access types of the IMSI correspond to two different TMSIs, or correspond to one same TMSI.

Preferably, the method may also have the following features:

the dual-mode dual-standby terminal carries dual-mode dual-standby capability indication information in a first position updating request sent to the core network equipment; when the core network equipment judges that the received position updating request carries dual-mode dual-standby capability indication information, the core network equipment carries access type information accessed this time in a second position updating request sent to the signing server; or

The core network device obtains whether the accessed terminal has dual-mode dual-standby capability from the subscription server through an authentication process, and if so, the core network device carries the access type information accessed this time in a position updating request sent to the subscription server.

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

the dual-mode dual-standby terminal can access two networks by using an International Mobile Subscriber Identity (IMSI), and is used for selecting an access type when the dual-mode dual-standby terminal accesses the network, and carrying the IMSI or a Temporary Mobile Subscriber Identity (TMSI) in a sent first location updating request, wherein the TMSI corresponds to the IMSI and the access type;

the core network device is used for carrying the IMSI, the core network device identification and the access type information of the access in a second location updating request 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 and the access type into the core network equipment identifier carried in the second location updating request after receiving the second location updating request.

Preferably, the system may also have the following features:

the subscription server is further configured to store two sets of service data associated with the IMSI and respectively corresponding to two access types, and insert subscription data into the core network device after receiving the second location update request;

Preferably, the system may also have the following features:

the subscription server is further configured to, after receiving the second location update request, send a location deletion request to the corresponding core network device according to the previously stored core network device identifier corresponding to the IMSI and the access type if the core network device identifier corresponding to the IMSI and the access type is previously stored, and then update the core network device identifier corresponding to the IMSI and the access type to the core network device identifier carried in the second location update request.

Preferably, the system may also have the following features:

the core network device is further configured to, when it is determined that the received location update request carries dual-mode dual-standby capability indication information, carry access type information of this access in a second location update request sent to the subscription server; or obtaining whether the accessed terminal has the dual-mode dual-standby capability from the subscription server through the authentication process, and if so, carrying the access type information accessed this time in the position updating request sent to the subscription server.

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

when a dual-mode dual-standby terminal which can access two networks by using an International Mobile Subscriber Identity (IMSI) initiates a calling service, an access type is selected according to the service type of a user, and the service is carried out through a wireless access network corresponding to the access type.

Preferably, the method may also have the following features:

and the dual-mode dual-standby terminal accesses the wireless access network for service by using a temporary identification code (TMSI), wherein the TMSI corresponds to the IMSI and 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 user states of two access types of the IMSI associated with the bearing capacity and the MSISDN;

the signing 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 selected access type, and sends the obtained MSRN back to a sender of the routing query message;

the subscription server stores an MSISDN subscribed by the dual-mode dual-standby terminal user, an IMSI associated with the MSISDN, and two access types associated with the IMSI.

Preferably, the method may also have the following features:

selecting an access type according to the bearer capability and the user states of the two access types of the IMSI associated with the MSISDN, wherein the selecting the access type comprises:

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

when the bearing capacity of the call is a video service in a data service, selecting a 3G access type when a user state corresponding to the 3G access type is an attachment state; and when the user state corresponding to the 2G access type is the attachment 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 an implementation method for clearing a mobile subscriber, including:

the core network equipment sends a user clearing message to a subscription server, wherein the user clearing message carries the IMSI of a user, or the IMSI of the user and one access type, or the IMSI of the user and all access types corresponding to the IMSI;

after receiving the message for clearing the user, the subscription server marks the user state of the access type of the IMSI with an unreachable identifier if the message for clearing the user carries the IMSI and the access type of the user; if the message only carries the IMSI of the user, or carries the IMSI of the user and all access types corresponding to the IMSI, the IMSI of the user is marked with an unreachable identifier or all the access types of the IMSI are marked with unreachable identifiers.

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

the information management module is used for storing an MSISDN signed by the dual-mode dual-standby terminal user, an IMSI associated with the MSISDN and two access types associated with the IMSI;

the network selection module is used for selecting an access type according to the bearing capacity and the user states of two access types of IMSI related to the MSISDN after receiving a routing query message carrying the MSISDN and the bearing capacity of the call in the 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 sending the obtained MSRN back to the sender of the routing query message.

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

the information management module is further to:

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

the information management module is further used for marking the user state of the access type of the IMSI as an unreachable identifier if the removal user message carries the IMSI and the access type of the user after receiving the removal user message; if the message only carries the IMSI of the user, or carries the IMSI of the user and all access types corresponding to the IMSI, the IMSI of the user is marked with an unreachable identifier or all the access types of the IMSI are marked with unreachable identifiers.

By adopting the invention, the dual-mode dual-standby terminal can access different networks by using the same MSISDN, and one user does not need to select the MSISDN. And because of using one IMSI number, the user can access two networks by using one card, 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 of implementing a called service based on the dual-mode dual-standby terminal of fig. 9;

fig. 12 is a flow of clearing a user 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 (Radio access type, RAT for short), and sometimes, the dual-mode dual-standby terminal is referred to as the terminal for short.

Example one

In this embodiment, a user of the dual-mode dual-standby terminal may use 1 IMSI number to access multiple radio access networks simultaneously, where the IMSI corresponds to one MSISDN. After the user signs two access types, the signing server, such as HLR/HSS, at least stores the IMSI of the user and two sets of service data which are associated with the IMSI and respectively correspond to the two access types.

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 of the terminal when accessing from AN1 as 2G.

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

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

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

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

The subscription server (home location register HLR/home subscriber server HSS) is used for storing subscriber data such as subscription data, IMSI, MSISDN and the like, and supporting and storing the subscriber 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, GMSC/TMSC and other networks of the communication system are consistent with existing network systems. CN2 and CN4 may be modified the same as CN1 and CN3, or may not be modified, that is, only part of the core network devices are upgraded.

In fig. 5, the first core network device and the first radio access network belong to a first network, the second core network device and the second radio access network belong to a second network, and the first network and the second network may be GSM and WCDMA, CDMA and CDMA2000, GSM and TD-SCDMA, WCDMA and CDMA2000, TD-SCDMA and CDMA2000, etc., and are not limited to specific two networks.

The dual-mode dual-standby terminal of the embodiment can simultaneously access two radio access networks by using 1 IMSI.

When the dual-mode dual-standby terminal accesses the network, the access type is selected, the IMSI or TMSI is carried in the sent position updating request, and the dual-mode dual-standby capability indication information can be carried.

The TMSI corresponds to the IMSI and the access type, and in the case of a core network, different access types of one IMSI generally correspond to different TMSI.

After receiving the location update request sent by the dual-mode dual-standby terminal, the core network devices CN1 and CN3 updated in this embodiment send a location update request to a subscription server (HLR/HSS) when determining that the location update request carries dual-mode dual-standby capability indication information, and carry the currently used IMSI, the core network device identifier, and the access type information of this access. If the location update request sent by the terminal does not carry the dual-mode dual-standby capability indication information, CN1 and CN3 may be processed according to the existing flow. However, in another embodiment, the core network device may not determine whether the location update request carries the dual-mode dual-standby capability indication information, and both carry the access type information in the location update request sent to the subscription server. In another embodiment, the core network device may also obtain, from the subscription server, whether the terminal has dual-mode dual-standby capability through an authentication procedure, and if so, carry the access type information in the location update request sent to the subscription server.

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, respectively, where the access type carried by the location update request initiated by CN1 is 2G, and the access type carried by the location update request initiated by CN3 is 3G.

After the user signs two access types, the signing server at least stores IMSI, two access types and two sets of service data corresponding to the two access types. After receiving a location update request containing access type information sent by core network equipment, a subscription server stores or updates the IMSI and a core network equipment identifier corresponding to the access type in the location update request to a core network equipment identifier in the location update request, and inserts subscription data into the core network equipment, wherein the subscription data comprises the IMSI and a set of service data corresponding to the access type accessed this time. And after the position is updated successfully, setting the user state of the access type as an attachment state.

After receiving the location updating request containing the access type information sent by the core network device, the subscription server stores the IMSI in the location updating request and the core network device identifier corresponding to the access type, and besides updating the core network device identifier corresponding to the IMSI and the access type, sends a location deleting request to the core network device identified by the core network device identifier corresponding to the IMSI and the access type stored before. To delete the subscription data stored in the core network device accessed by the terminal using the IMSI and the access type.

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

step one, when 1 IMSI can be used to access a dual-mode dual-standby terminal access network of a plurality of networks, selecting an access type, wherein a sent first position updating request carries dual-mode dual-standby capability indication information and TMSI corresponding to the IMSI or the IMSI;

the dual-mode dual-standby capability may be indicated by using a version (version Level) field in the user class 2, for example, when the field is "11", the dual-mode dual-standby capability is used to identify that the terminal has the dual-mode dual-standby capability.

Step two, after the core network equipment accessed by the dual-mode dual-standby terminal receives the first position updating request, the second position updating request sent to the signing server carries the IMSI, the core network equipment identification and the access type information accessed this time;

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 location updating request, the subscription server stores or updates the core network equipment identifier corresponding to the IMSI and the access type into the core network equipment identifier in the second location updating request, and inserts subscription data into the core network equipment, wherein the subscription data includes the IMSI, the MSISDN corresponding to the IMSI, and a set of service data corresponding to the access type of the current access.

If the access type in the second location updating request is 2G, inserting a set of service data to be used when the user accesses through the 2G wireless access network; and if the access type in the second location updating request is 3G, inserting a set of service data to be used when the user accesses through the 3G wireless access network.

In addition, after receiving the location update request containing the access type information sent by the core network device, the subscription server sends a request for deleting the location to the corresponding core network device according to the previously stored core network device identifier corresponding to the IMSI and the access type, and then updates the core network device identifier corresponding to the IMSI and the access type to the core network device identifier carried in the second location update request.

In another embodiment, the subscription data of the user stored in the subscription server may also be a set of subscription data that can be used for two access types, and at this time, the set of subscription data is inserted into the core network device regardless of the access type.

The above flow mainly describes different processing of the location update flow of this embodiment and the existing location update flow, and related processing not mentioned, such as authentication, may be processing in the existing location update flow.

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

601, the dual-mode dual-standby terminal UE selects IMSI or TMSI1 corresponding to the 2G access mode to perform the access process 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 IMSI, or step 601 selects TMSI1 corresponding to the 2G access mode, the message also includes a location area identifier LAI, and the message includes a user class 1(Mobile Station class 1) or a user class 2(Mobile Station class 2), and in particular, in this example, when a version (Revision Level) field in the user class 2 is "11", the message is used to identify that the terminal has dual-mode dual-standby capability;

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

604, after the IMSI authentication of the UE is successful, 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 IMSI and a CN1 identifier, that is, an MSC address, a VLR number, and a RAT, and the RAT is used to indicate an access network type of the UE, that is, 2G access;

605, the HLR/HSS checks whether the core network device identifier corresponding to the IMSI and the RAT is empty, if so, stores the core network device identifier corresponding to the IMSI and the RAT as the core network device identifier in the message, executes step 608, and if not, executes the subsequent step 606;

606, in step 605, HLR/HSS checks that the core network device identifier corresponding to IMSI and RAT 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 updates the corresponding relationship between IMSI and RAT and core network device identifier, modifies the corresponding MSC address and VLR number to the one of CN1, HLR/HSS sends a MAP delete LOCATION request message (MAP CANCEL LOCATION) to CN2, where the message carries the user identifier IMSI and RAT;

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

if CN2 does not recognize RAT parameters, all subscription data corresponding to the IMSI is deleted, and if CN2 recognizes RAT parameters, subscription data corresponding to RAT, that is, 2G subscription data, is deleted.

608, the HLR/HSS sends a MAP insert Subscriber DATA message (MAP insert Subscriber DATA) to CN1, where the subscription DATA carried by the message includes an IMSI, service DATA corresponding to access type 2G, and a Mobile Subscriber number (Mobile Subscriber International ISDN/PSTNnumber, MSISDN for short), where ISDN is an Integrated services digital Network (ISDN is an abbreviation of Integrated services digital Network), and PSTN is a Public Switched Telephone Network (PSTN), which is an abbreviation of Public switched telephone Network (Public switched telephone Network);

609, after receiving the MAP inserting user data message, CN1 stores the subscription data (including service data, user number IMSI, MSISDN and RAT) of the user, and returns a MAP inserting user data response message to HLR/HSS;

610, HLR/HSS sends back MAP location update request response message to CN1, and sets the user state of RAT1 of the IMSI 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 the TMSI2 corresponding to the IMSI or 3G access mode, and performs similar steps 602 to 613 in AN2, CN3, CN4 and HLR/HSS, thereby completing the location updating process of the TMSI2 corresponding to the IMSI or 3G access mode in CN 3.

The dual-mode dual-standby terminal accesses to CN1 through AN1 or accesses to CN3 through AN2 in no sequence, CN1 and CN3 store the same MSISDN number and IMSI of a user after the access is successful, two new TMSIs are stored in the dual-mode dual-standby terminal, the 2G access mode corresponds to TMSI1, and the 3G access mode corresponds to TMSI 2.

Example two

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.

In fig. 9, a first radio access network belongs to a first network, a second radio access network belongs to a second network, and a second core network device belongs to both the first network and the second network; the first network and the second network may be GSM and WCDMA, CDMA and CDMA2000, GSM and TD-SCDMA, WCDMA and CDMA2000, TD-SCDMA and CDMA2000, etc., and are not limited to specific two networks.

The TMSI corresponds to the IMSI and the access type, and in the case of a common core network, different access types of one IMSI may correspond to different TMSIs or may correspond to the same TMSI.

After receiving the location update request sent by the dual-mode dual-standby terminal, the core network device CN3 after being upgraded in this embodiment sends a location update request to a subscription server (HLR/HSS) if it is determined that the location update request carries dual-mode dual-standby capability indication information, where the location update request carries the IMSI currently used, the core network device identifier, and the access type information of this access. If the location update request sent by the terminal does not carry the dual-mode dual-standby capability indication information, CN3 may process according to the existing flow. However, in another embodiment, the core network device may not determine whether the location update request carries the dual-mode dual-standby capability indication information, and both carry the access type information in the location update request sent to the subscription server. In another embodiment, the core network device may also obtain, from the subscription server, whether the terminal has dual-mode dual-standby capability through an authentication procedure, and if so, carry the access type information in the location update request sent to the subscription server.

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 IMSI, two access types and two sets of service data corresponding to the two access types. After receiving a location update request containing access type information sent by a core network device, a subscription server stores or updates the IMSI and a core network device identifier corresponding to the access type in the location update request as the core network device identifier in the location update request, and inserts subscription data into the core network device, where the subscription data includes the IMSI and a set of service data corresponding to the access type of the current access, or includes the IMSI and all service data (two sets of service data) corresponding to the IMSI. And after the position is updated successfully, setting the user state of the access type as an attachment state.

step one, when 1 IMSI can be used to access a dual-mode dual-standby terminal access network of a plurality of networks, selecting an access type, wherein a sent first position updating request carries dual-mode dual-standby capability indication information and the IMSI or TMSI; wherein, the TMSI corresponds to the IMSI and the access type;

Step three, after receiving the second location updating request, the subscription server stores or updates the core network device identifier corresponding to the IMSI and the access type to the core network device identifier in the second location updating request, and inserts subscription data into the core network device, where the subscription data includes the IMSI and the MSISDN corresponding to the IMSI, and a set of service data corresponding to the access type of this access or all service data corresponding to the IMSI.

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 AN1 according to a network coverage situation, 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 IMSI or the dual-mode dual-standby terminal selects 2G to access to the corresponding TMSI1, the message also includes a location area identifier LAI, and the message includes a user class 1(Mobile Station class 1) or a user class 2(Mobile Station class 2), in this example, when a version (RevisionLevel) field in the user class 2 is "11", the message is used to identify that the terminal has dual-mode dual-standby capability;

1002, the CN3 implements a 2G authentication process for the UE, which is specifically described with reference to steps 202 to 205 in the background art;

1003, after 2G authentication of the UE is successful, CN1 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 IMSI and a CN3 identifier, that is, AN MSC address and a VLR number, and the message carries AN access type RAT1 of the current LOCATION UPDATE, and the access type is 2G access according to AN access mode of AN 1;

if the terminal is a non-dual-mode dual-standby terminal, the message may not carry the current access type RAT 1;

1004, the HLR/HSS checks whether the core network device identifier corresponding to the IMSI and the access type 2G is empty, if so, stores the core network device identifier corresponding to the IMSI and the access type 2G as the core network device identifier in the message, executes step 1007, and if not, executes the subsequent step 1005;

1005, if the HLR/HSS checks that the core network device identifier corresponding to the IMSI and access type 2G is not empty and the stored MSC address and VLR number correspond to the CN4 network in step 1004, indicating that the user roams from CN4 to CN3 network, the HLR/HSS updating the correspondence between the IMSI and RAT1 and the core network device identifier, modifying the corresponding MSC address and VLR number to the MSC address and VLR number of CN3, the HLR/HSS sending a MAP delete location request message (MAPCANCEL LOCATION) to CN4, where the message carries the user identifier IMSI and the access type RAT1, where RAT1 is 2G;

1006, after the CN4 deletes the stored subscription data, it sends back a MAP deletion location request response message to the HLR/HSS;

if CN4 does not recognize RAT parameters, all subscription data corresponding to the IMSI is deleted, and if CN4 recognizes RAT parameters, subscription data corresponding to RAT, that is, 2G subscription data, is deleted.

1007, the HLR/HSS sends a MAP insert Subscriber DATA message (MAP insert Subscriber DATA) to CN3, where the subscription DATA carried by the message includes IMSI, service DATA corresponding to access type 2G, and a Mobile Subscriber number (Mobile Subscriber International ISDN/PSTNnumber, MSISDN for short), where ISDN is an Integrated services digital Network, which is an abbreviation of Integrated services digital Network, PSTN is a Public switched telephone Network, which is an abbreviation of Public switched telephone Network;

here, the subscription data of all access modes (i.e. the subscription data of 2G or 3G) may be inserted at the same time, so that the case of access from 3G does not have this step.

1008, CN3, after receiving MAP insert user data message, storing user subscription data (including service data, user number IMSI, MSISDN and RAT1) and sending back MAP insert user data response message to HLR/HSS;

1009, HLR/HSS sends a MAP location update request response message back to CN 3;

1010, described with reference to background art 212-213;

step 1010 is an optional process and the encryption process may not be performed depending on the device conditions of the operator.

1011, the CN3 sends a location update confirm message to the UE through AN1, and if the network needs to reallocate the TMSI, the message may contain a TMSI reallocation command message, the TMSI reallocation command carries a new TMSI1 allocated by the network, and the message may also carry AN indication that the network supports dual mode dual standby;

1012, 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 1011, the UE completes location update access to CN1 through AN1 in step 1011, and if it does, the UE completes location update access to CN1 through AN1 in step 1012.

If the steps 1001-1012 fail or the step 1011 carries the capability indication that the network supports dual mode dual standby, the following steps are executed, otherwise, if the position updating of the steps 1001-1012 succeeds and the step 1011 does not carry the capability indication that the network supports dual mode dual standby, the following steps are not executed, and the dual mode dual standby terminal is used as a dual mode single standby terminal.

S1001, the dual-mode dual-standby terminal initiates a location update request message to CN3 through a wireless access network AN2 according to a network coverage situation, the message carries the type of the location update, and indicates whether the location update is ordinary or periodic, or IMSI is attached, the message also carries IMSI, or the dual-mode dual-standby terminal selects 3G to access to the corresponding TMSI2, the message also comprises a location area identifier LAI, the message comprises a user class 1(Mobile Station class 1) or a user class 2(Mobile Station class 2), and in the present example, when a version Level field in the user class 2 is '11', the message is used for identifying that the terminal has dual-standby capability;

s1002, the CN3 realizes a 3G authentication process for the UE, and the specific description refers to the steps 202-205 in the background technology;

s1003, after the 3G authentication of the UE is successful, CN3 sends a mobile application Part (MAP for short) LOCATION UPDATE request message (MAP UPDATE LOCATION) to HLR/HSS, wherein the message carries a user identifier IMSI and a CN3 identifier, namely AN MSC address and a VLR number, the message carries AN access type RAT2 of the LOCATION UPDATE, and the access type is 3G access according to AN access mode of AN 2;

if the terminal is a non-dual-mode dual-standby terminal, the message may not carry the current access type RAT 2;

s1004, HLR/HSS checks whether the core network device identifier corresponding to access type 3G is empty, if so, saves IMSI and the core network device identifier corresponding to 3G as the core network device identifier in the message, and executes step S1007, if not, executes the following step S1005;

s1005, in step S1004, the HLR/HSS checks that the IMSI and the core network device identifier corresponding to the access type 3G are not empty, and the stored MSC address and VLR number correspond to the CN4 network, which indicates that the user roams from CN4 to CN3 network, the HLR/HSS updates the corresponding relationship between the IMSI and RAT2 and the core network device identifier, modifies the corresponding MSC address and VLR number to the MSC address and VLR number of CN3, the HLR/HSS sends a MAP delete location request message (MAPCANCEL LOCATION) to CN4, where the message carries the user identifier IMSI and the access type RAT2, where RAT2 is 3G;

s1006, CN4 sends back MAP delete position request response message to HLR/HSS after deleting the stored subscription data;

Since CN4 in steps S1005 and S1006 is different from CN4 in steps 1005 and 1006 but is an additional 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.

S1007, HLR/HSS checks whether 3G user DATA has been inserted into CN3, if so, S1007-S1008 is not executed, if not, HLR/HSS sends MAP insert user DATA message (MAP INSERT SUBSCRIBER DATA) to CN3, the subscription DATA carried by the message includes IMSI, Service DATA corresponding to access type 2G and mobile SUBSCRIBER number (Mobile SUBSCRIBER International ISDN/PSTN number, MSISDN for short), wherein ISDN is Integrated Service Digital Network, short for Integrated Service Digital Network, PSTN is Public Switched Telephone Network, short for Public Switched Telephone Network;

s1008, CN3 stores the subscription data (including service data, user number IMSI, MSISDN and RAT2) of the user after receiving the MAP inserting user data message, and returns the MAP inserting user data response message to HLR/HSS;

s1009, HLR/HSS sends MAP location update request response message back to CN 3;

s1010, as described with reference to background art 212-213;

step S1010 is an optional procedure, and the encryption process may not be performed according to the device condition of the operator.

S1011, CN3 sends a location update confirmation message to UE through AN2, 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;

s1012, after the UE saves the new TMSI2, the UE sends a TMSI reallocation complete message to CN 3.

If there is no TMSI reallocation command message at step S1011, the UE completes location update access to CN1 through AN1 at step S1011, and if included, the UE completes location update access to CN1 through AN1 at step S1012.

The access of the dual-mode dual-standby terminal to the CN3 through AN1 or to the CN3 through AN2 is not in sequence, after the access is successful, the CN3 stores two sets of information under the same number of the user, and two new TMSIs are stored in the dual-mode dual-standby terminal: TMSI1 and TMSI 2.

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.

The dual mode dual standby terminal can access a first radio access network and a second radio access network. In this embodiment, the second radio access network in fig. 5 or fig. 9 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.

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 the service is performed through a wireless access network corresponding to the access type.

And accessing the radio access network corresponding to the TMSI corresponding to the access type to perform service.

Taking the first radio access network as a 2G radio access network and the second radio access network as a 3G radio access network as an example, the network selection can be performed as follows.

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 network selection is carried out according to the mode, and the network with better communication quality and service is selected on the premise of ensuring normal communication of the user, so that the user quantity of the network can be balanced, and the network resources can be fully utilized.

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 TMSI corresponding to the access type or the access type to access to a network corresponding to the dual-mode dual-standby terminal for service according to the service type, when the calling service is a voice service, the TMSI1 corresponding to the 2G access or the 2G access is preferentially selected to access to CN1 from AN1, when the calling service is a fax service in a data service, the TMSI2 corresponding to the 3G access or the 3G access is preferentially selected to access to CN3 from AN2, when the calling service is a video service in the data service, only the TMSI2 corresponding to the 3G access or the 3G access is selected to access to CN3 from AN2, and if the dual-mode dual-standby terminal is not in the coverage range of AN2, the dual-mode dual-standby terminal is converted into the voice service, and the TMSI1 corresponding to the 2G access is selected to access to CN1 from AN 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 UE.

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.

In this embodiment, the first network and the second network in fig. 5 or fig. 9 are not limited to GSM and WCDMA, such as CDMA and CDMA2000, GSM and TD-SCDMA, etc. The second radio access network is an evolution network of the first radio access network, and the access capability of the second radio access network is stronger compared with that of the first radio access network.

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:

the information management module is used for storing an MSISDN signed by the dual-mode dual-standby terminal user, an IMSI associated with the MSISDN and two access types associated with the IMSI.

And the network selection module is used for selecting an access type according to the user states of two access types of the IMSI related to the bearing capacity and 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.

Wherein,

if the user states of the two access types are not in the attachment state, the network selection module can refuse the call. If the user state of at least one access type is in the attachment state, the following modes can be selected:

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

For a user of the dual-mode dual-standby terminal, two access types are associated under one MSISDN, so that other users only need to dial the same MSISDN when calling the user, and the network side selects the access type to connect the called party, thereby greatly facilitating the user and improving the user experience. Further, the access type is selected according to the method, so that the network with better communication quality and service can be selected on the premise of ensuring normal communication of the user, the user quantity of the network can be balanced, and the network resources can be fully utilized.

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, a signing server stores an MSISDN signed by a dual-mode dual-standby terminal user, an IMSI associated with the MSISDN and two access types associated with the IMSI;

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 two access types of IMSI associated with the MSISDN;

when the user states of the two access types are both in an attached state, the used access type can be determined according to the bearing capacity, and the core network equipment identifier 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 selected access type, and sends the obtained MSRN back to the sender of the routing query message to continue the subsequent called process.

Based on the network architecture in the core network division manner in fig. 5, core network devices corresponding to two access types 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 easily understood that the above steps included in the called procedure are the same, but the core network devices corresponding to the two access types 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 access types associated with the called number MSISDN and selects the access type in the following way:

if the user states of 2 access types corresponding to the called number are all attachment states, 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 corresponding to the 3G access type in the 2 access types corresponding to the called number is in the attachment state, all services select the 3G access type.

If only the user state corresponding to the 2G access type in the 2 access types 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 queries, according to the called network corresponding to the access type selected in step 803, that is, taking the bearer capability as a voice service, and analogizing other data services, that the 2G access type stored in the HLR/HSS in the user state of the activated state corresponds to the MSC address and VLR number of CN1, and then sends a MAP providing roaming number request message to CN1, where the message carries the called IMSI and RAT in the 2G access type, and also carries the MSC number of CN 1;

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

805, CN1 allocates a roaming Number (MSRN) to corresponding IMSI and RAT according to configuration, then CN1 carries MSRN and returns MAP providing roaming Number request response message to HLR/HSS;

the following process is referred to steps 405-417 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 stored subscriber states corresponding to the 2 access types associated with the called number MSISDN, and selects the access type in the following way:

if the user states of 2 access types corresponding to the called number are all attachment states, 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 (corresponding to the MSC address and VLR number of CN 3) is selected.

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;

1105, CN3 allocates a Roaming Number (MSRN for short) to corresponding IMSI and RAT according to configuration, then CN3 carries MSRN to send back MAP request response message to HLR/HSS;

EXAMPLE five

The communication system of the present embodiment adopts a network architecture of a core network system shown in fig. 9.

The embodiment mainly relates to the improvement of core network equipment and a subscription server.

When a user needs to be deleted, the core network equipment sends a message for clearing the user to a subscription server, wherein the message carries the IMSI of the user and can also carry an access type;

specifically, the combination that the message can carry is: the IMSI of the user, or the IMSI of the user and the corresponding access type, or the IMSI of the user and all the access types corresponding to the IMSI;

after receiving the message for clearing the user, the signing server marks the user state of the access type of the IMSI with an unreachable identifier if the message carries the IMSI and the access type of the user; if the message only carries the IMSI of the user, or carries the IMSI of the user and all access types corresponding to the IMSI, the IMSI of the user is marked with an unreachable identifier or all the access types of the IMSI are marked with unreachable identifiers, therefore, when the GMSC requests a route to a subscription server, if the subscription server inquires the requested IMSI or the requested access type of the IMSI is marked with the unreachable identifier, an error response is directly replied, and the error response value is that the user is turned off.

Correspondingly, the information management module in the fourth embodiment may be further configured to, after receiving the message for removing the user, if the message for removing the user carries the IMSI and one access type of the user, mark the user state of the access type of the IMSI with an unreachable identifier; if the message only carries the IMSI of the user, or carries the IMSI of the user and all access types corresponding to the IMSI, the IMSI of the user is marked with an unreachable identifier or all the access types of the IMSI are marked with unreachable identifiers.

The following describes in detail a method for implementing a procedure of clearing a mobile user based on the dual-mode dual-standby terminal of the system architecture of fig. 9 with reference to fig. 12.

1201, CN1 sends MAP clearing user message (MAP Purge MS) to HLR/HSS according to VLR user deletion or network management operation thereof, where the message carries IMSI of dual-mode dual-standby terminal user, or IMSI of the user and corresponding access type, or IMSI of the user and two access types corresponding to the IMSI;

1202, when the HLR/HSS receives that the MAP purging user message is an IMSI and a corresponding access type, marking the user state of the access type of the IMSI as an unreachable identifier, and if the MAP purging user message is an IMSI or 2 access types, marking the IMSI of the user or the user states corresponding to all the access types as an unreachable identifier;

when the subscriber state is marked with the unreachable identifier, the GMSC requests a route to the HLR/HSS, if the HLR inquires that the requested IMSI or the access type of the requested IMSI is marked with the unreachable identifier, an error response is directly sent back to the GMSC, and the error response value is that the subscriber is turned off.

1203, HLR sends back a MAP _ CLEAR USER MESSAGE RESPONSE message to CN 1.

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 foregoing embodiments may also be implemented by using one or more integrated circuits, and accordingly, each module/unit in the foregoing 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 above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for realizing location update by a dual-mode dual-standby terminal comprises the following steps:

2. The method of claim 1,

the subscription data includes the IMSI, the MSISDN corresponding to the IMSI, and a set of service data corresponding to the access type of the current access, or includes the IMSI, a mobile subscriber number (MSISDN) corresponding to the IMSI, and all service data corresponding to the IMSI.

3. The method of claim 2,

4. The method of claim 1,

5. The method of claim 4,

6. The method of claim 1,

7. The method of claim 1,

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

9. The system of claim 8,

10. The system of claim 9,

11. The system of claim 8,

12. The system of claim 8,