WO2006114056A1

WO2006114056A1 - Method and system for restrictiing roaming region of terminal and device thereof

Info

Publication number: WO2006114056A1
Application number: PCT/CN2006/000802
Authority: WO
Inventors: Fengshao Zou
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-04-26
Filing date: 2006-04-26
Publication date: 2006-11-02
Also published as: CN100512524C; CN1859718A

Abstract

A method for restricting roaming region of terminal, sets roaming region on precision roaming restriction module for terminal, and signs up smart trigger for the terminal on the HLR of the terminal. The method includes the following steps: A, obtain the smart trigger from the HLR of the terminal signing up roaming restriction service, and trigger the corresponding precision roaming restriction module according to the address of the smart trigger to perform step B; B, the precision roaming restriction module obtains the position information of the terminal, and determines whether the terminal is located in the set roaming region, if yes, then indicates the calling serving MSC/VLR to continue telecommunication; otherwise, indicates the calling serving MSC/VLR to refuse telecommunication. A system and its related device for restricting roaming region of terminal are also disclosed. By the present invention, the roaming region of terminal can be restricted with higher precision; and the influence for the change of wireless environment, in which the terminal located, to the roaming region of terminal, is also reduced.

Description

Method and system for limiting terminal roaming range and related device

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and system for limiting terminal roaming range in a mobile communication network and related devices. Background of the invention

In a mobile communication network, it is sometimes necessary to limit the roaming range of the mobile terminal. For example, for a wireless public telephone terminal, if the range in which the terminal can be roamed is allowed to be too large, that is, the range in which the terminal is allowed to move is too large, it would be disadvantageous for the management of the terminal. If some wireless public telephone terminals are stolen and can be used to steal calls, this will bring some economic loss to the operators. Therefore, the operator needs to limit the roaming range of the terminal, and hopes that the limit of the roaming range of the terminal is more accurate.

In the prior art, the usual solution for roaming restriction on a terminal is to record a mobile switching center/visit location register (MSC, Mobile Switching Center/VLR) that allows the terminal to roam on the terminal's Home Location Register (HLR). , Visitor Location Register ), thereby limiting the roaming of the terminal to the area covered by one or several MSC/VLRs.

However, since the roaming range of the terminal is restricted to be closely related to the MSC/VLR in the prior art, the following problems are inevitable when the roaming range of the terminal is restricted:

1. Allow the terminal to roam too large. With the above solution, the minimum roamable range of the terminal must also be a range covered by the MSC/VLR, and the terminal navigation cannot be further limited to a smaller range. Usually an MSC/VLR can cover a range of hundreds of square kilometers, which is obviously too large for the terminal's roaming restrictions. '

2. The change of the wireless environment in which the terminal is located may affect the roaming range of the terminal. limits. When testing, planning, optimizing, or expanding a mobile communication network, the MSC/VLR itself whose terminal is restricted may be subject to some changes: For example, if the coverage size of the MSC/VLR changes, it is obvious that the terminal will roam. The scope affects; if the MSC/VLR itself has undergone major changes, for example, when testing the mobile communication network, the operator initializes the attributes of the MSC/VLR itself, then tests the mobile communication network. During this period of time, the MSC/VLR's restrictions on the range of terminal roaming may not exist at all.

3. For terminals at the junction of two MSC/VLRs, it may be within the coverage of two MSC/VLRs. At this time, if the roaming range of the terminal is limited to the coverage of one of the MSC/VLRs, when the wireless environment of another MSC/VLR changes, the terminal may not be able to communicate normally; however, if the terminal's roaming range is Limiting the coverage of two MSC/VLRs will further expand the range of roaming of the terminal. Summary of the invention

In view of this, the main object of the present invention is to provide a method and system for limiting the roaming range of a terminal and related devices, to limit the roaming range of the terminal with higher precision, and to reduce the change of the wireless environment to the terminal. The impact of roaming range.

In order to achieve the above object, the present invention provides a method for limiting the roaming range of a terminal. On the precise roaming restriction module, a roaming range is set for a terminal that has subscribed to the roaming restriction service, and the terminal is registered on the home location registration S of the terminal. A smart trigger, wherein the address of the smart trigger is an accurate roaming restriction module, and the method includes the following steps in the terminal connection process:

A, the smart trigger is obtained from the home location register of the terminal that has subscribed to the roaming restriction service, and according to the address of the smart trigger, triggering the corresponding precise roaming restriction module to perform step B; B. The precise roaming restriction module acquires terminal location information, and determines, according to the location information, whether the terminal is located within a set roaming range, and if yes, instructs the calling service mobile switching center/visit location register to continue communication; otherwise, the indication The calling service mobile switching center/visit location register rejects the communication.

In order to achieve the above object, the present invention further provides a system for limiting the roaming range of a terminal, including a calling terminal, a called terminal, and a communication establishing subsystem, the system further comprising: a positioning subsystem: configured to: The instruction of the system interacts with the calling terminal, and/or the called terminal to obtain the location information of the calling terminal, and/or the called terminal, and sends the obtained location information to the logic control subsystem;

Logic control subsystem: used to instruct the positioning subsystem to obtain the location information of the calling terminal, and/or the called terminal, and determine the calling terminal according to the location information sent by the positioning subsystem, and/or The calling terminals are respectively located in a preset roaming range, and then according to the judgment result, the communication establishing subsystem is established to establish a connection with the called terminal.

In order to achieve the above object, the present invention further provides a service control point, and further includes: an [precise roaming restriction module: configured to: in the process of connecting to the called terminal, instructing the mobile positioning center to acquire the calling terminal, and/ Or, the location information of the called terminal, and according to the location information sent by the positioning module, determine whether the calling terminal, and/or the called terminal are respectively located in a preset roaming range, and then decide whether to continue according to the judgment result. The connection is made to the called terminal.

In order to achieve the above object, the present invention further provides a mobile positioning center, including a positioning module, and further comprising:

The precise roaming restriction module is configured to: in the process of connecting to the called terminal, instruct the positioning module to acquire the location information of the calling terminal, and/or the called terminal, and determine the main location according to the location information sent by the positioning module. Calling the terminal, and/or, whether the called terminal is located within a preset roaming range, and then determining whether it is necessary to continue to be the main called terminal according to the judgment result. Line continues.

With the technical solution provided by the present invention, the operator sets the roamable range for the terminal that has signed the roaming restriction service in the form of latitude and longitude, and limits the roaming range of the terminal according to the terminal latitude and longitude information acquired by the positioning technology. In the technical solution provided by the present invention, the accuracy that can be achieved by limiting the roaming range of the terminal depends on the accuracy that the positioning technology can achieve, and the existing positioning technology can generally achieve an accuracy of several tens of meters. It is smaller than the coverage of the MSC VLR, which solves the problem that the roaming range of the terminal in the prior art is too large, and the purpose of limiting the roaming range of the terminal with higher precision is achieved.

If the positioning manner used to obtain the terminal latitude and longitude information is independent of the mobile communication network, the roaming range limitation of the terminal in the present invention and the MSC/VLR coverage, base station coverage, cell coverage or The coverage of the sector is irrelevant, and it is not affected by the planning, optimization or expansion of the mobile communication network where the terminal is located. Therefore, the present invention also reduces the impact of the terminal's roaming restrictions due to changes in the wireless environment in which the terminal is located. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a flow chart of an overall technical solution of a method for limiting a range of roaming of a terminal according to the present invention;

2 is a signaling flow diagram of Embodiment 1 of a method for limiting roaming range of a terminal according to the present invention;

3 is a signaling flow diagram of Embodiment 2 of a method for limiting roaming range of a terminal according to the present invention;

4 is a schematic diagram of a network reference model based on location services in a code division multiple access communication network system;

FIG. 5 is a block diagram of a system for limiting roaming range of a terminal according to the present invention. Mode for carrying out the invention

The present invention will be further described in detail below with reference to the accompanying drawings.

The core content of the present invention is: pre-setting a roaming range for a terminal that has subscribed to the roaming restriction service on the precise roaming restriction module; in the terminal connection process, triggering the precise roaming restriction module to acquire the location information of the terminal that has subscribed to the roaming restriction service And determining, according to the location information, whether the terminal that has subscribed to the roaming restriction service is located in a preset roaming range, and if yes, instructing the calling service MSC/VLR to continue communication; otherwise, instructing the calling service MSC/VLR to reject the communication .

As shown in FIG. 1, FIG. 1 is a flow chart of an overall technical solution for providing a method for limiting a range of terminal roaming, including the following steps:

Step 101: Set a roaming range for the terminal that has subscribed to the roaming restriction service on the precise roaming restriction module, and sign the smart trigger for the terminal on the HLR of the terminal that has subscribed to the roaming restriction service. The address of the smart trigger is an address of the precise roaming restriction module.

Step 102: Start the terminal connection process, obtain the smart trigger from the HLR of the terminal that has subscribed to the roaming restriction service, and trigger the corresponding precise roaming restriction module to perform the precise roaming restriction service according to the address of the smart trigger, where the precise roaming is performed. The limiting service specifically includes: the precise roaming restriction module acquires terminal location information, and determines, according to the location information, whether the terminal is located within a set roaming range, and if yes, instructs the calling service MSC/VLR to continue to communicate; otherwise, instructs the main The service MSC/VLR is called to reject the communication.

In a call, the calling terminal may sign the roaming restriction service, or the called terminal may sign the roaming restriction service, and 'the main called terminal may sign the roaming restriction service. For the last case, the precise roaming restriction service should be understood to mean that the calling service MSC/VLR continues to communicate only when the primary and secondary called parties are respectively within their respective roaming ranges. The roaming range of the terminal that has signed the roaming restriction service can be set by the operator. When the operator sets the roaming range for the terminal that has subscribed to the roaming restriction service on the precise roaming restriction module, the latitude and longitude range that allows the terminal to roam may be set as the roaming range of the terminal according to actual needs.

In addition, when the terminal location information is obtained under the current technical conditions, the positioning technology can only achieve a certain positioning accuracy, and the accuracy may affect the judgment of whether the terminal is located in the roaming range of the terminal. Therefore, in order to better limit the terminal to the desired latitude and longitude range of the operator, when setting the roaming range of the terminal, the operator may first set a range of latitude and longitude that allows the terminal to roam according to its actual needs, and then according to the acquisition. The positioning accuracy of the positioning technology used in the terminal location information, the latitude and longitude range covered by the latitude and longitude range in which the operator allows the terminal to roam and the positioning accuracy range of the positioning technology used when acquiring the terminal location information, 'set to the terminal Roaming range.

For example, if the latitude and longitude range in which the operator allows the terminal to roam is the range included between the east longitude X ~ Y degree and the north link M ~ N degree, the positioning technique used in obtaining the terminal position information has a positioning accuracy range of ± n degrees. , the roaming range of the terminal can be set to the range between the east longitude (X - 2n ) - ( Y + 2n ) degree and the north latitude (M - 2n ) - (N + 2n ) degree.

The roaming range set by the operator for the terminal is generally stored in the database of the precise roaming restriction module itself. Of course, in order to save the set roaming range, the operator can also use a dedicated database or use a database shared with other entities, as long as the database for saving the roaming range can interact with the precise roaming restriction module, so that the precise roaming restriction module When it is determined whether the terminal is located in the roaming range of the terminal, the roaming range set for the terminal can be successfully obtained. - When saving the roaming range of the terminal, the terminal is generally associated with the roaming range set by the operator for the terminal in the form of a corresponding relationship. In this correspondence, it may be a mobile terminal identifier (MSID, Mobile Station Identifier) and operation of a specific terminal. The roaming range set by the quotient for the terminal is one-to-one correspondence, and may also be all terminals in a certain number segment.

The MSID is in one-to-one correspondence with the roaming range set by the operator for all terminals in the segment. The accurate roaming restriction module can find the roaming range set by the operator for the terminal in the above database according to the MSID of the terminal and the corresponding relationship.

A terminal subscription roaming restriction service may be implemented in multiple manners. One implementation manner may be that the operator sets the roaming range for the terminal as the terminal subscribes to the roaming restriction service. In this case, when the precise roaming restriction module determines whether the terminal has subscribed to the roaming restriction service, it may determine, according to the MSID of the terminal, whether the roaming range corresponding to the MSID of the terminal is stored in the database: If yes, the terminal is considered to be contracted. Roaming restricts the service; otherwise, it considers that the terminal does not subscribe to the roaming restriction service.

In addition, the terminal may also use the subscription sign to implement the subscription roaming restriction service, and the subscription identifier corresponds to the MSID of the terminal, and the correspondence may also be stored in the above database. The signing flag can be implemented by using a binary bit. For example, if the signing flag is 1 to indicate that the terminal has signed the roaming restriction, and the signing flag is 0, the terminal does not sign the roaming restriction service. In this case, when the precise roaming restriction module determines whether the terminal has subscribed to the roaming restriction service, it can determine whether the subscription flag corresponding to the MSID of the terminal stored in its database is 1 according to the MSID of the terminal: Then, the terminal signs the roaming restriction service; otherwise, the terminal does not sign the roaming restriction service.

In a specific network application, the precise roaming restriction module may be located at a service control point (SCP) of the intelligent network system, or may be located in a service connected to the calling party, and/or the called service MSC VLR. Mobile Positioning Center (MPC, Mobile Position Center).

When the terminal triggers the smart trigger on the HLR of the terminal, the calling terminal that has subscribed to the roaming restriction service needs to sign the initial call smart trigger on the calling HLR, and the trigger address is the precise roaming restriction module. address. The initial smart trigger can be Origination—Attempt—Authorized Trigger, ALL—Calls Trigger, or Calling—Routing—ddress_Available Trigger. For the called terminal that has subscribed to the roaming restriction service, it is required to sign the terminal call smart trigger for the called terminal on the called HLR, and the trigger address is the address of the precise roaming restriction module. The terminating smart trigger can be an Initial- Termiantion trigger or an Advanced- Termination trigger. In addition, in the case that the called terminal subscribes to the roaming restriction service, it is also required to sign the Location trigger on the called HLR, and the trigger address is the called HLR address.

After the corresponding precise roaming restriction module is triggered to perform the precise roaming restriction service, the precise roaming restriction module can use the location based service (LBS) to obtain the location information of the terminal, and then according to the obtained terminal location information and the set terminal. Roaming range, which achieves precise limits on the range of terminal roaming.

In order to explain in detail the method for limiting the range of roaming of a terminal provided by the present invention, two specific embodiments will be described below in detail with reference to the accompanying drawings. First, the method for limiting the roaming range of the terminal provided by the present invention is described by taking the precise roaming restriction module in the SCP as an example.

As shown in FIG. 2, FIG. 2 is a signaling flowchart of Embodiment 1 of a method for limiting roaming range of a terminal according to the present invention. In this embodiment, only the calling terminal is a terminal that has subscribed to the roaming restriction service. The operator pre-sets the roaming range for the calling terminal that has signed the roaming restriction service on the SCP of the intelligent network system, and signs the initial call smart trigger for the calling terminal that has signed the roaming restriction service on the calling HLR, and the initial call of the signing call The smart trigger is ALL_Calls, and its trigger address is an SCP address. This embodiment includes the following steps:

Step 201: The calling service MSC/VLR sends a location registration notification (REGNOT) message to the calling HLR to perform location registration on the calling terminal.

Step 202: The calling HLR receives the REGNOT message, and returns the initial call smart trigger ALL_Calls signed by the calling terminal to the calling service MSC/VLR in the regnot response message. The calling service MSC/VLR receives the regnot response message, and saves the initial call smart trigger ALL_Calls and its trigger address signed by the calling terminal to its own database.

Step 203: The calling terminal calls the called terminal, and the calling service MSC/VLR detects in the database that the calling terminal subscribes to the initial call smart trigger ALL_Calls, according to the trigger address of the ALL_Calls trigger, ie, SCP. The address, sending an Origination Request (ORREQ) message to the SCP corresponding to the smart trigger address, triggering the SCP to perform an accurate roaming restriction service.

In the ORREQ message, the TRIGTYPE parameter is used to indicate the type of the initial call smart trigger, which is an ALL_Calls trigger in this embodiment; the MSCID parameter is used to indicate the identity of the calling service MSC; and the MSID parameter is used to indicate the calling terminal. The identifier can be MIN or International Mobile Subscriber Identity (IMSI, International Mobile Subscriber Identity).

Step 204: After receiving the ORREQ message, the SCP determines whether the calling terminal subscribes to the roaming restriction service: If yes, sends a location request (ISPOSREQ) message to the serving MPC connected to the calling service MSC/VLR to request the calling terminal. Location information; otherwise, go to step 211.

The SCP determines whether the calling terminal subscribes to the roaming restriction service according to whether or not the roaming range corresponding to the MSID of the calling terminal in the received ORREQ message is stored in the database. If the SCP is saved, the calling terminal signs the roaming. Restrict the service; otherwise, the calling terminal does not sign the roaming restriction service;

In the ISPOSREQ message sent by the SCP to the serving MPC, the MSID parameter is used to carry the MIN/IMSI information of the calling terminal, the POSREQTYPE parameter is used to indicate the location request type, the PQOS parameter is used to indicate the positioning accuracy information, and the MSCID parameter is used to indicate the calling party. Service MSC ID.

Step 205: The serving MPC sends an ISPOSREQ message to the calling service MSC/VLR^ requesting the relevant location information of the calling terminal.

The service MPC corresponds to the MSCID according to the MSCID in the received ISPOSERQ message. The calling service MSC sends an ISPOSERQ message. In the ISPOSREQ message sent by the serving MPC to the calling service MSC/VLR, the MSID parameter is used to carry the MIN/IMSI information of the calling terminal, the POSREQTYPE parameter is used to indicate the location request type, and the PQOS parameter is used to indicate the positioning accuracy information, the LIRAUTH parameter. Used to indicate location information to restrict authorization.

Step 206: The calling service MSC/VLR carries the relevant location information of the calling terminal in the isposreq message and returns it to the service MPC;

In the returned isposreq message, the MSCID parameter is used to indicate the calling service MSC identity, the SCELLID parameter is used to indicate the serving cell identity of the calling party, the MPCAP parameter is used to indicate the mobile positioning capability, and the MOBINFO parameter is used to indicate the mobile information. This information is the information used in the subsequent positioning process.

Step 207: The service MPC, the Positioning Determining Entity (PDE), and the calling MSC VLR locate the calling terminal according to the relevant location information of the calling terminal, and obtain the location information of the calling terminal.

Step 208: The service MPC carries the location information of the calling terminal in the isposreq message and returns it to the SCP.

Step 209: The SCP determines, according to the obtained location information of the calling terminal and the preset roaming range of the terminal, whether the calling terminal is located in the terminal roaming range set by the operator: If yes, returns to the calling service MSC/VLR. An originating request response (orreq) message indicating that the calling service MSC/VLR call continues; otherwise, the Access Denied Reason is carried in the returned orreq message, instructing the calling service MSC/VLR to reject the call.

Step 210: After the MSC VLR receives the orreq message, if the Access Denied Reason is found in the orreq message, the call is interrupted; otherwise, step 211 is performed.

Step 211: The call continues, requesting the called routing information from the called HLR according to the called number, and establishing a call with the called service MSC/VLR.

In this way, when the roaming restriction service terminal is signed as the calling party to initiate the call, it will be SCP. It is judged whether the terminal is located in the terminal roaming range set by the operator. If yes, the call is continued, otherwise the call will be rejected, and the terminal cannot initiate the call.

As shown in FIG. 3, FIG. 3 is a signaling flowchart of Embodiment 2 of a method for limiting roaming range of a terminal according to the present invention. The method for limiting the roaming range of the terminal provided by the present invention is still described by taking the precise roaming restriction module in the SCP as an example.

In this embodiment, only the called terminal is a terminal that has subscribed to the roaming restriction service, and the operator sets a roaming range for the called terminal that has signed the roaming restriction service on the SCP of the intelligent network system in advance; the contract is signed on the called HLR. The called terminal of the roaming restriction service subscribes to the terminal call smart trigger, the signed termination call smart trigger is Advanced_ Termination, the trigger address is the SCP address, and the called terminal subscribes to the Location trigger on the called HLR. The trigger address is the called HLR address, and the embodiment includes the following steps:

Step 301: The calling terminal calls the called terminal, and the calling service MSC/VLR sends a location request (LOCREQ) message to the called HLR, which is used to obtain the routing information of the called terminal.

In the LOCREQ message, the MSCID parameter is used to indicate the calling service MSC identity, the DGTSDIAL parameter is used to indicate the called number, and the calling service MSC/VLR obtains the called HLR address by analyzing the called number, and then according to the called HLR address. The HLR^ is sent to the LOCREQ message; the TRIGTYPE parameter is used to indicate the type of the terminating smart trigger, which is a Mobile- Termination trigger in this embodiment; the Mobile- Termination trigger does not need to be signed, when the called terminal is a mobile terminal, The smart trigger type is the Mobile- Termination trigger.

Step 302: After receiving the LOCREQ message, the called HLR finds that the called terminal has subscribed to the smart trigger, and returns a locreq response message to the calling service MSC/VLR.

In the locreq response message, the trigger address list TRIGADDRLIST parameter is used to indicate that the called terminal has subscribed to the Advanced- Termination trigger and the Location trigger, and the MSID parameter is used to indicate the MIN IMSI information of the called terminal, and the MSCID parameter is used to indicate that Call the service MSC logo.

Step 303: After receiving the locreq response, the calling service MSC/VLR detects the Advanced- Termination trigger in the TRIGADDRLIST parameter, and the Advanced_Termination trigger address is an SCP address, and sends an information analysis request to the SCP according to the Advanced- Termination trigger address. (ANLYZD) message, triggering the SCP corresponding to the smart trigger address to perform precise roaming restriction service.

In the ANLYZD message, the TRIGTYPE parameter is used to indicate that the trigger is an Advanced- Termination trigger, the MSCID parameter is used to indicate the calling service MSC identity, the MSID parameter is used to indicate the MIN/IMSI information of the called terminal, and the DGTSDIAL parameter is used to indicate that the trigger is Called number, MDN parameter is used to indicate the called directory number.

Step 304: After receiving the ANLYZD message, the SCP determines whether the called terminal has subscribed to the roaming restriction service: if yes, sends an ISPOSREQ message to the serving MPC connected to the called service MSC VLR to request the location information of the called terminal; otherwise , go to step 311.

The SCP determines, according to its own database, whether the roaming range corresponding to the MSID of the called terminal in the received ANLYZD message is used to determine whether the called terminal has subscribed to the roaming restriction service: if stored, the called terminal signs the roaming Restricted; otherwise, the called terminal does not sign up for roaming restrictions.

In the ISPOSREQ message sent by the SCP to the serving MPC, the MSID parameter is used to indicate the MIN/IMSI information of the called terminal, the MSCID parameter is used to indicate the called service MSC identity, the POSREQTYPE parameter is used to indicate the location request type, and the PQOS parameter is used to indicate Positioning accuracy information.

Step 305: The serving MPC sends an ISPOSREQ message to the called service MSC/VLR requesting relevant location information of the called terminal.

In the ISPOSREQ message sent by the serving MPC to the called service MSC/VLR^, the MSID parameter is used to indicate the MIN/IMSI information of the called terminal, and the POSREQTYPE parameter is used to indicate The location request type, the PQOS parameter is used to indicate the location accuracy information, and the LIRAUTH parameter is used to indicate the location information restriction authorization.

Step 306: The called service MSC/VLR carries the relevant location information of the called terminal in the isposreq message and returns it to the service MPC;

In the returned isposreq message, the MSCID parameter is used to indicate the called service MSC identity, the SCELLID parameter is used to indicate the service cell identity of the called party, the MPCAP parameter is used to indicate the mobile location capability, and the MOBINFO parameter is used to indicate the mobile information. This information is needed during subsequent positioning.

Step 307: The service MPC, the PDE, and the called MSC/VLR perform location location on the called terminal according to the related location information of the called terminal, to obtain location information of the called terminal.

Step 308: The service MPC carries the location information of the called terminal in the isposreq message and returns it to the SCP.

Step 309: The SCP obtains the location information of the called terminal and the terminal roaming range preset by the operator, and determines whether the called terminal is located in the terminal roaming range set by the operator: If yes, returns to the calling service MSC/VLR. 'Analyze request response (anlyzd) message, the parameter is used to indicate that the calling service MSC VLR call continues; otherwise, the Access Denied Reason is carried in the returned anlyzd message, the parameter is used to indicate that the calling service MSC VLR rejects the call.

Step 310: The calling service MSC VLR receives the anlyzd message and determines whether there is an Access Denied Reason in the anlyzd message: If yes, the call is interrupted, and the process ends; otherwise, step 311 is performed.

Step 311: The calling service MSC VLR detects the Location trigger in the TRIGADDRLIST, and the Location trigger address is the called HLR address, and sends a LOCREQ message to the called HLR according to the Location trigger address, which is used to obtain the called terminal route. Information

In the LOCREQ message, the TRIGTYPE parameter is used to indicate that the trigger is triggered by Location. The trigger address is the called HLR address; the MSCID parameter is used to indicate the calling service MSC identity, and the DGTSDIAL parameter is used to indicate the called number.

Step 312: The called HLR sends a ROUTREQ message to the called service MSC/VLRJ3⁄4_ to obtain the called routing information, where the ROUTREQ message includes the called MSCID and the called MSIDo.

Step 313: After receiving the ROUTREQ message, the called service MSC/VLR allocates a temporary local directory number (TLDN, Temporary Local Directory Number) to the called terminal according to the MSCID and the MSID, and carries the TLDN in the routreq response to return to Called HLR.

Step 314: The called HLR packages the TLDN into the terminal list (TERMLIST) parameter, returns the call to the calling service MSC VLR through the lcoreq response message, and also includes the called MSCID and the called MSID in the lcoreq response message.

Step 315: The calling service MSC VLR establishes a call to the called service MSC/VLR according to the TLDN in the TERMLIST parameter.

Thus, when the terminal that has subscribed to the roaming restriction service as the called party, the SCP also determines whether the called terminal is within the terminal roaming range set by the operator, and if so, the call continues, otherwise the call is rejected.

In the two embodiments of the present invention, the roaming range set by the operator for the terminal is stored in the database of the intelligent network system SCP itself. In practical applications, in order to save the set roaming range, the operator may also use a dedicated database or use a database shared with other entities, as long as the database for storing the roaming range can interact with the SCP, so that the SCP is judged. When the terminal is located in the roaming range of the terminal, the roaming range set for the terminal can be successfully obtained.

In the two embodiments of the present invention, the SCP determines whether the terminal has subscribed to the roaming restriction, and determines whether the database in the database is stored in the database according to the MSID of the terminal. The roaming range corresponding to the MSID: If yes, the terminal signs the roaming restriction; otherwise, the terminal does not sign the roaming restriction. In an actual application, the terminal subscription roaming restriction may be implemented in multiple manners. The judging whether the terminal has subscribed to the roaming restriction may also be different according to the terminal subscription roaming restriction mode. For example, the terminal may also use the subscription sign to implement the subscription roaming restriction, and the subscription logo corresponds to the MSID of the terminal, and the correspondence may also be stored in the SCP's own database. In this case, when the SCP determines whether the terminal has subscribed to the roaming restriction, the MSID of the terminal may determine whether the subscription flag corresponding to the MSID of the terminal stored in its database is 1: If yes, the terminal signs the roaming. Restricted; otherwise, the terminal does not sign up for roaming restrictions. Such technical solutions are completely in line with the technical solutions provided by the present invention and should be included in the scope of protection of the present invention.

In addition, in the two embodiments of the present invention, the ALL-Calls trigger is signed by the terminal on the calling HLR, and the trigger address is the SCP address; and the terminal is signed by the called HLR on the called HLR. Termination trigger whose trigger address is the SCP address. In practical applications, the originating-attempt-authorized trigger or the Calling-Routing-ddress-enabled trigger may also be signed for the terminal on the calling HLR, and the trigger addresses of both are SCP addresses; The terminal subscribes to the Initial- Termiantion trigger, whose trigger address is the SCP address. Such technical solutions are completely in line with the technical solutions provided by the present invention and should be included in the scope of protection of the present invention.

In addition, in the two embodiments of the present invention, the specific implementation of the present invention is illustrated by taking the terminal that only the calling terminal is the roaming restriction service and the terminal that only the called terminal is the roaming restriction service. the way. For the case where both the calling terminal and the called terminal are terminals that have subscribed to the roaming restriction service, two embodiments of the present invention may be combined. That is, the step of the first embodiment is performed to determine whether the calling terminal is located in the roaming range set by the calling terminal. If yes, the step of the second embodiment is performed to determine whether the called terminal is Located within the roaming range set for the called terminal. In both embodiments of the invention, the precise roaming restriction module is located on the SCP of the intelligent network system. For the case where the precise roaming restriction module is located on the MPC, the entire MPC can be divided into two main modules, one is an accurate roaming restriction module, and the other is a positioning module for performing the functions of the MPC described in the above two embodiments. . In this case, the network entity SCP in the above two embodiments is replaced with the MPC positioning module, and the network entity SCP in the above two embodiments is replaced with the MPC precise roaming restriction module, so that the precise roaming restriction module can be obtained. Signaling flow diagram when located on the MPC.

In the two embodiments of the present invention, the SCP provided by the present invention further includes an accurate roaming restriction module relative to the SCP of the prior art. The precise roaming restriction module is configured to: determine location information acquired from the MPC according to the request of the calling service MSC/VLR, and determine, according to the location information, whether the terminal is located in the set roaming range, and if yes, instruct the calling service The MSC/VLR continues to communicate; otherwise, the calling service MSC/VLR is instructed to reject the communication. The MPC is connected to the serving MSC VLR of the terminal that has subscribed to the roaming restriction service. The terminal that has signed the roaming restriction service may be either a calling terminal or a called terminal.

If the precise roaming restriction module is located on the MPC, the MPC provided by the present invention further includes an accurate roaming restriction module with respect to the existing MPC. The precise roaming restriction module is configured to: obtain, according to the request of the calling service MSC VLR, a location module that is responsible for positioning the terminal from the MPC, obtain location information of the terminal that has subscribed to the roaming restriction service, and determine, according to the location information, whether the terminal is Located within the set roaming range, if yes, the calling service MSC/VLR is instructed to continue communicating; otherwise, the calling service MSC/VLR is instructed to reject the communication. The terminal that has signed the roaming restriction service may be either a calling terminal or a called terminal.

Regardless of whether the precise roaming restriction module is located on the SCP or on the MPC, the specific working process is as follows: First, it is determined whether the calling terminal subscribes to the roaming restriction service, if the main When the calling terminal subscribes to the roaming restriction service, the MPC is instructed, or the positioning module of the MPC obtains the location of the calling terminal. If the calling terminal is not located within the preset roaming range, the precise roaming restriction module instructs the calling service MSC/ The VLR rejects the communication; if the calling terminal is located within a preset roaming range, the precise roaming restriction module further determines whether the called terminal has subscribed to the roaming restriction service. If the called terminal subscribes to the roaming restriction service, the precise roaming restriction module indicates the MPC, or the positioning module of the MPC acquires the location of the called terminal. If the called terminal is located within a preset roaming range, the precise roaming restriction module indicates The calling service MSC/VLR continues to communicate, otherwise the calling service MSC/VLR is instructed to reject the communication. If the called terminal does not subscribe to the roaming restriction service, the precise roaming restriction module instructs the calling service MSC/VLR to continue communication.

If the calling terminal does not subscribe to the roaming restriction service, the precise roaming restriction module further determines whether the called terminal has subscribed to the roaming restriction service. If the called terminal subscribes to the roaming restriction service, the precise roaming restriction module indicates the MPC, or the positioning module of the MPC acquires the location of the called terminal. If the called terminal is located within a preset roaming range, the precise roaming restriction module indicates The calling service MSC/VLR continues to communicate, otherwise the calling service MSC/VLR is instructed to reject the communication. If the called terminal does not subscribe to the roaming restriction service, the precise roaming restriction module instructs the calling service MSC/VLR to continue communication.

The foregoing determines whether the calling terminal, and/or the called terminal subscribes to the roaming restriction service, and determines whether the calling terminal needs to be acquired according to the judgment result, and/or, the location information of the called terminal may be determined by the precise roaming restriction module. The signing judgment sub-module is completed.

In the two embodiments of the present invention, after the triggering the precise roaming restriction module initiates positioning of the destination terminal, the precise roaming restriction module uses the LBS to acquire the location information of the terminal. The LBS is a service in which the communication network system acquires actual location information such as the longitude and latitude of the terminal, and provides the user with geographically significant information according to the obtained actual location information. For example, displaying the actual location information of the terminal on an electronic map, or obtaining Take the actual location information of the terminal, find out the location information of hotels, hospitals, shopping centers, schools, etc. near the terminal, and provide the name, telephone information, etc. of the hotel, hospital, shopping center, school, etc. to the end user.

To clearly illustrate the LBS utilized by the Precision Roaming Restriction Module, the LBS is described in detail below in conjunction with the LBS network reference model diagram.

As shown in FIG. 4, FIG. 4 is a schematic diagram of a network reference model of an LBS in a Code Division Multiple Access (CDMA) communication network system. LBS introduces network entities such as PDE, MPC, and Client-Location Service Client (LCS) in the CDMA network. The main function of the PDE is: When receiving the location request of the MPC, the PDE exchanges information with related devices such as the MSC, the MS, and the base station controller (BSC, Base Station Controller), and uses various measurement information and various data to pass specific The algorithm performs the specific positioning calculation and reports the final calculation result to the MPC. The MPC is the control management center that locates the operation process and the control management center of the location information; the LCS is used to receive the location request and locate it through the MPC.

In the process of using LBS to obtain the actual location information of the terminal, there are mainly three implementation methods:

The first is a network-based source cell technology, which acquires the actual location information of the terminal according to the identity of the mobile cellular serving cell where the terminal is located.

The second is a trilateration technique based on the time of arrival (TOA) or time difference of arrival (TDOA) principle, which acquires the actual location information of the terminal based on the angle and delay of the radio signal between the terminal and one or more base stations. .

The third is an auxiliary global positioning system (A-GPS) technology based on satellite radio navigation system, which uses the radio signals of GPS satellites to locate and obtain the actual position information of the terminal.

Since the implementation accuracy range of each implementation is different, in practical applications, operation When setting the roaming range of the terminal, the adjustment can be made according to the difference in the positioning accuracy range of each positioning technology. In addition, in practical applications, other positioning technologies may also be used to obtain the location information of the terminal, as long as the roaming range of the terminal is adjusted accordingly.

Please refer to FIG. 5. FIG. 5 is a block diagram of a system for limiting terminal roaming range provided by the present invention. The system includes:

Calling terminal: Used to initiate a call to the called terminal through the communication establishment subsystem; also used to interact with the positioning subsystem to obtain its own location.

Called terminal: Used to interact with the positioning subsystem to obtain its own location.

Communication establishment subsystem: Used to establish a connection between the calling terminal and the called terminal according to the instruction of the logic control subsystem.

Positioning subsystem: used to interact with the calling terminal, and/or the called terminal according to the instructions of the logic control subsystem to obtain the location information of the calling terminal, and/or the called terminal, and obtain the obtained location Information is sent to the inverse control subsystem.

Logic control subsystem: used to perform precise roaming restriction service, that is, location information sent by the location subsystem, determine the calling terminal that has signed the roaming restriction service, and/or, whether the called terminal that has signed the roaming restriction service is respectively It is located in a preset roaming range, and then instructs the communication establishment subsystem to establish a connection with the called terminal according to the judgment result.

Specifically, the logic control subsystem first determines whether the calling terminal subscribes to the roaming restriction service. If the calling terminal subscribes to the roaming restriction service, the logic control subsystem instructs the positioning subsystem to acquire the location of the calling terminal, if the calling terminal If not located within a preset roaming range, the logic control subsystem instructs the communication establishment subsystem to stop establishing a communication connection for the called terminal; if the calling terminal is located within a preset roaming range, the logic control subsystem further determines Whether the called terminal has signed a roaming restriction service. If the called terminal subscribes to the roaming restriction service, the logic control subsystem instructs the positioning subsystem to acquire the location of the called terminal. If the called terminal is located within a preset roaming range, the logical control subsystem instructs the communication to be established. The subsystem establishes a communication connection with the called terminal, otherwise it indicates that the communication establishment subsystem stops establishing a communication connection for the called terminal. If the called terminal does not subscribe to the roaming restriction service, the logical control sub-module instructs the communication establishment subsystem to establish a communication connection with the called terminal.

If the calling terminal does not subscribe to the roaming restriction service, the logical control subsystem further determines whether the called terminal has subscribed to the roaming restriction service. If the called terminal subscribes to the roaming restriction service, the logic control subsystem instructs the positioning subsystem to acquire the location of the called terminal. If the called terminal is located within a preset roaming range, the logic control subsystem instructs the communication establishment subsystem to The calling and called terminals establish a communication connection, otherwise the communication establishment subsystem is instructed to stop establishing a communication connection for the called terminal. If the called terminal does not subscribe to the roaming restriction service, the logical control sub-module instructs the communication establishment subsystem to establish a communication connection with the called terminal.

Determining whether the calling terminal, and/or the called terminal has subscribed to the roaming restriction service, and determining whether to acquire the calling terminal according to the judgment result, and/or, the location information of the called terminal may be in the logic control subsystem. The signing judgment module is completed.

As can be seen from the above description, the method and system for the precise roaming restriction provided by the present invention and related devices obtain the smart trigger from the HLR of the terminal that has subscribed to the roaming restriction service during the terminal connection process, according to The address of the smart trigger triggers the corresponding precise roaming restriction module to acquire terminal location information, and determines whether the terminal is located within the set roaming range according to the location information, and if yes, instructs the calling service MSC VLR to continue communication; otherwise, The calling service MSC VLR is instructed to reject the communication.

With the present invention, since the operator sets the roaming range for the terminal that has subscribed to the roaming restriction service, the operator can set the roaming range according to the latitude and longitude, so that the problem that the roaming range of the terminal is too large is well solved, and the precise terminal roaming range is achieved. purpose. In addition, when the positioning mode is independent of the mobile communication network, the roaming restriction on the terminal in the present invention is independent of the MSC/VLR coverage, base station coverage, cell coverage, or sector coverage of the terminal in the wireless environment. It is also not affected by the planning, optimization or expansion of the mobile communication network where the terminal is located. ring. Therefore, the present invention also reduces the impact of the terminal's roaming restriction due to changes in the wireless environment in which the terminal is located.

The above described specific embodiments of the present invention are described in detail, and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for limiting the range of roaming of a terminal, characterized in that: setting a roaming range for a terminal that has subscribed to the roaming restriction service on the precise roaming restriction module, and signing a smart trigger for the terminal on the home location register of the terminal, The address of the smart trigger is an address of the precise roaming restriction module. In the terminal connection process, the method includes the following steps:

A, the smart trigger is obtained from the home location register of the terminal that has subscribed to the roaming restriction service, and according to the address of the smart trigger, triggering the corresponding precise roaming restriction module to perform step B;

B. The precise roaming restriction module acquires terminal location information, and determines, according to the location information, whether the terminal is located within a set roaming range, and if yes, instructs the calling service mobile switching center/visit location register to continue communication; otherwise, the indication The calling service mobile switching center/visit location register rejects the communication. '

The method according to claim ,, wherein, when the terminal is the calling party, the smart trigger is an initial call smart trigger, and the step A refers to the attribution of the terminal that has subscribed to the roaming restriction service. The location register obtains the smart trigger includes:

All, the calling service mobile switching center/visit location register sends a location registration notification message to the calling home location register, and performs location registration on the calling terminal;

A12. The calling home location register receives the location registration notification message, and the initial call smart trigger signed by the calling terminal is carried in the location registration notification response message and returned to the calling service mobile switching center/visiting location register;

A13. The calling service mobile switching center/visiting location register receives the location registration notification response message, and saves the address of the initial calling smart trigger signed by the calling terminal to its own database.

3. The method according to claim 2, wherein step A is based on the The address of the smart trigger triggers the corresponding precise roaming restriction module to perform step B. The calling service mobile switching center/visiting location register detects in the database that the calling terminal subscribes to the initial calling smart trigger, and triggers according to the initial call intelligent trigger. The trigger address of the device sends a start call request message to the precise roaming restriction module, and triggers the precise roaming restriction module corresponding to the smart trigger address to perform step B.

The method according to claim 3, wherein when the terminal acts as a calling party, the instructing the calling service mobile switching center/visiting location register to continue communication according to step B is to move to the calling service. The switching center/visit location register returns an origin call request response message;

The indication of the calling service mobile switching center/visiting location register rejecting the communication is performed by returning to the calling service mobile switching center/visiting location register an origin call request response message carrying the reason for the access rejection.

The method according to claim 1, wherein when the terminal is called, the smart trigger is a terminal call smart trigger, and the step A refers to the attribution of the terminal that has subscribed to the roaming restriction service. The location register obtains the smart trigger includes:

A21. The calling service mobile switching center/visit location register sends a location request message to the called home location register to obtain routing information of the called terminal.

A22. After receiving the location request message, the called home location register finds that the called terminal has subscribed to the smart trigger, and the smart trigger list signed by the called terminal is carried in the location request response message and returned to the calling service mobile switching center/ Visiting a location register, the smart trigger being a terminal call smart trigger included in the smart trigger list;

A23. The calling service mobile switching center/visit location register receives the location request response message, and saves the terminal call smart trigger address signed by the called terminal to its own database.

The method according to claim 5, wherein the step B is performed according to the address of the smart trigger, and the step B of triggering the corresponding precise roaming restriction module includes: The calling service mobile switching center/visiting location register sends an information analysis request message to the precise roaming restriction module according to the trigger address of the terminating smart trigger in the smart trigger list, triggering the precise roaming restriction module corresponding to the smart trigger address to execute Step B.

The method according to claim 6, wherein when the terminal is called, the instructing the calling service mobile switching center/visiting location register to continue communication according to step B is to move to the calling service. The switching center/visit location register returns an analysis request response message;

The indication of the calling service mobile switching center/visiting location register rejecting the communication is performed by returning an analysis request response message carrying the reason for the access rejection to the calling service mobile switching center/visiting location register.

The method according to claim 1, wherein the setting the roaming range for the terminal that has subscribed to the roaming restriction service on the precise roaming restriction module comprises:

On the precise roaming restriction module, the latitude and longitude range that allows the terminal to roam is set to the roaming range of the terminal that has subscribed to the roaming restriction service.

On the precise roaming restriction module, the latitude and longitude range covered by the latitude and longitude range that allows the terminal to roam and the positioning accuracy range of the positioning technology used when acquiring the terminal location information is set as the terminal that subscribes to the roaming restriction service. Roaming range.

The method according to claim 1, wherein the setting of the roaming range for the terminal that has subscribed to the roaming restriction service further comprises:

Save the set roaming range in the database;

In step B, it is determined whether the terminal is located in the set roaming range:

It is determined whether the terminal is located in a roaming range stored in the database.

11. The method of claim 1 wherein the step of step B is Before the roaming restriction module obtains the terminal location information, the method further includes:

The precise roaming restriction module determines whether the terminal subscribes to the roaming restriction service according to the terminal identifier, and if so, acquires the terminal location information; otherwise, directly instructs the calling service mobile switching center/visit location register to continue communication.

The method according to claim 11, wherein the roaming range set by the terminal that has subscribed to the roaming restriction service is stored in a database, and the precise roaming restriction module determines, according to the terminal identifier, whether the terminal has subscribed to roaming. Limit business to:

The precise roaming restriction module determines whether the roaming restriction range corresponding to the mobile terminal identifier of the terminal is stored in the database. If yes, the terminal is considered to have subscribed to the roaming restriction service; otherwise, the terminal does not subscribe to the roaming restriction service.

The method according to claim 11, wherein a subscription flag is set for each terminal identifier in the database, and the precise roaming restriction module determines, according to the terminal identifier, whether the terminal subscribes to the roaming restriction service:

The precise roaming restriction module determines whether the subscription sign corresponding to the terminal identifier in the database indicates that the terminal has subscribed to the roaming restriction service. If yes, the terminal considers that the terminal has subscribed to the roaming restriction service; otherwise, the terminal does not sign the roaming restriction service.

14. A method according to any one of claims 10 to 13, wherein the database is:

The database of the precise roaming restriction module, or a dedicated database, or a database shared by the exact roaming restriction module with other entities.

The method according to claim 1, wherein the precise roaming restriction module is located at a service control point, and the obtaining, by the precise roaming restriction module, the location information of the terminal includes:

Bl, the precise roaming restriction module of the service control point sends a location request message to the serving mobile positioning center, requesting location information of the terminal; B2. The service mobile positioning center sends a location request message to the serving mobile switching center/visit location register, requesting relevant location information of the terminal;

B3. The service mobile switching center/visit location register carries the relevant location information of the terminal in the location request response message, and returns to the service mobile positioning center;

B4. The service mobile positioning center, the positioning entity, the mobile switching center/the visitor location register, the location location of the terminal is obtained according to the relevant location information of the terminal, and the location information of the terminal is obtained;

B5. The service mobile positioning center carries the location information of the terminal in the location request response message, and returns an accurate roaming restriction module to the service control point.

The method according to claim 1, wherein the precise roaming restriction module is located at the service mobile positioning center, and the obtaining the location information of the terminal by the precise roaming restriction module in step B includes:

B1. The precise roaming restriction module of the service mobile positioning center sends a location request message to the positioning module also located on the service mobile positioning center, requesting location information of the terminal;

B2. The positioning module of the service mobile positioning center sends a location request message to the serving mobile switching center/visit location register, requesting relevant location information of the terminal;

B3. The service mobile switching center/visit location register carries the relevant location information of the terminal in the location request response message, and returns to the positioning module of the service mobile positioning center;

B4. The positioning module, the positioning entity, the mobile switching center/visiting location register of the service mobile positioning center locate the terminal according to the relevant location information of the terminal, and obtain the location information of the terminal;

B5. The service mobile positioning center carries the location information of the terminal in the location request response message, and returns to the precise roaming restriction module of the service mobile location center.

A system for limiting the range of roaming of a terminal, comprising a calling terminal, a called terminal, and a communication establishing subsystem, wherein the system further comprises:

Positioning subsystem: used to command the subsystem according to the logic, with the calling terminal, and / Or, the called terminal interacts to obtain the location information of the calling terminal, and/or the called terminal, and sends the obtained location information to the logic control subsystem;

The migration control subsystem is configured to instruct the positioning subsystem to obtain the location information of the calling terminal, and/or the called terminal, and determine the calling terminal, and/or the called party according to the location information sent by the positioning subsystem. Whether the terminals are respectively located in a preset roaming range, and then instructs the communication establishment subsystem to establish a connection with the called terminal according to the judgment result.

The system of claim 17, wherein the logical control subsystem further comprises:

The contract judgment module is configured to determine whether the calling terminal, and/or the called terminal subscribes to the roaming restriction service, and determines whether it is necessary to obtain the location information of the calling terminal, and/or the called terminal according to the judgment result.

A service control point, wherein the service control point further includes: an accurate roaming restriction module: configured to: in the process of connecting to the called terminal, instruct the mobile positioning center to acquire the calling terminal, And/or, the location information of the called terminal, and according to the location information sent by the positioning module, determining whether the calling terminal, and/or the called terminal are respectively located in a preset roaming range, and then determining whether according to the judgment result It is necessary to continue to connect to the called terminal.

A mobile positioning center, comprising a positioning module, wherein the mobile positioning center further comprises:

The precise roaming restriction module is configured to: in the process of connecting to the called terminal, instruct the positioning module to acquire the location information of the calling terminal, and/or the called terminal, and determine the main location according to the location information sent by the positioning module. The calling terminal, and/or the called terminal are respectively located in a preset roaming range, and then according to the judgment result, it is determined whether it is necessary to continue to connect to the called terminal.