WO2012113278A1

WO2012113278A1 - Method and system for limiting concurrent forwarding

Info

Publication number: WO2012113278A1
Application number: PCT/CN2012/070665
Authority: WO
Inventors: 张振华; 肖杰
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-02-24
Filing date: 2012-01-20
Publication date: 2012-08-30
Also published as: CN102123397A; CN102123397B

Abstract

The present invention relates to a method and system for limiting concurrent forwarding. The method comprises: a Mobile Switching Center (MSC) initiating a location application message to a Home Location Register (HLR); upon receiving the location application message, the HLR acquiring the current forwarding count of a called number and a preset forwarding count threshold; when the current forwarding count is greater than or equal to the preset forwarding count threshold, the HLR returning a rejection response message to the MSC, and prohibiting the forwarding of the called number. In the present invention, the standard HLR is in cooperation with the MSC to control the number of times of user forwarding, thereby effectively reducing malicious forwarding. Moreover, some suspicious numbers are reported for alarm, so as to effectively prevent actions aimed at cheating users, thereby improving use security of users and achieving the objective of protecting the interests of consumers.

Description

Method and system for limiting concurrent forwarding

The present invention relates to the field of mobile communication technologies, and in particular, to a method and system for limiting concurrent forwarding. Background technique

In daily life, people often receive strange calls. These phones often ring when they ring. These phone numbers are no different from domestic ordinary numbers. When people call back according to the phone number, they will hear them. Some advertisements, winnings, etc., may be forwarded to an audio station, such as being accessed into a foreign porn chat or reactionary counseling center, and some criminals will charge the transfer fee. These malicious forwards not only cause harassment of people's lives, but also cause losses to personal calls and operator calls.

At present, for the HLR, it is only responsible for judging whether the called user has the forwarding authority, such as whether the forwarding is authorized, whether there is a call right for the forwarding number, etc., and cannot determine whether the called number may be a malicious number; Responsible for the routing and connection of the called party, it is powerless to detect whether the called number is suspicious. Therefore, core network devices (including HLRs, MSCs, etc.) are currently unable to control this malicious forwarding behavior in accordance with standard protocols. Summary of the invention

The main object of the present invention is to provide a method and system for limiting concurrent forwarding, which aims to improve the effectiveness of controlling malicious forwarding behavior and user security.

In order to solve the above technical problem, the present invention provides a method for limiting concurrent forwarding, comprising: a mobile switching center MSC initiating a location request message to a home location register HLR; and after receiving the location request message, the HLR obtains a current called number Forward count and pre- The forward rotation count threshold is set. When the current forward rotation count is greater than or equal to the preset forward rotation threshold, the HLR returns a rejection response message to the MSC, prohibiting the forward of the called number.

Preferably, the method further comprises:

After the HLR receives the location request message, it determines that the current forwarding count of the called number is less than the preset forwarding count threshold.

The HLR carries the current forwarding number corresponding to the called number in the location request response message, and sends it to the MSC, and increases the current forwarding count of the called number by one;

The MSC connects the terminal call to the current forwarding number according to the received location request response message, and establishes a call;

Preferably, after the establishing the call, the method further includes: after the call is released, the MSC sends a forward number application message to the HLR, to notify the HLR that the forwarding call ends;

The HLR decrements the forwarded count of the called number by one and returns a forwarded number request response to the MSC. Preferably, when the current forwarded count is greater than or equal to the preset forward count threshold, the HLR returns a reject response to the MSC. The message, after the step of prohibiting the forwarding of the called number, further includes: the HLR sending the forward trap alarm information to the alarm platform.

Preferably, the method further includes: after the HLR receives the location request message, the HLR determines whether the called number is signed unconditionally forwarded and satisfies the forwarding condition, and if the signing is unconditionally forwarded and the forwarding condition is met, performing the determining The step of whether the current forward count of the called number is less than the preset forward counting threshold; otherwise, if the called number has a busy forward or no answer forward, the HLR receives the forward number request message sent by the calling MSC. And determining, according to the forward number application message, whether the current forward count of the called number is less than a preset forward count threshold.

The present invention also provides a system for limiting concurrent forwarding, including an MSC and an HLR in the same core network, and the terminal accesses the core network through a wireless network, where:

The MSC, configured to initiate a location request message to the HLR; The HLR is configured to obtain a current forwarding count of the called number and a preset forwarding count threshold after receiving the location request message initiated by the MSC, where the current forwarding count is greater than or equal to a preset When the count threshold is forwarded, a reject response message is returned to the MSC.

Preferably, the HLR is further configured to: after receiving the location request message, determine that the current forwarding count of the called number is less than a preset forwarding count threshold, and then forward the current forwarding number corresponding to the called number. Carrying in the location request response message is sent to the MSC, and the current forwarding count of the called number is one;

The MSC is further configured to establish a call by connecting the terminal call to the current forwarding number according to the received location request response message.

Preferably, the HLR is further configured to: after the call is released, receive a forward number application message sent by the MSC, decrement the current forwarding count of the called number by one, and return a forwarding number application response message to the MSC;

The MSC is further configured to send a forward number application message to the HLR after the call is released, and notify the HLR to forward the call.

Preferably, the HLR is further configured to send a forward trap alarm information to the alarm platform after returning the reject response message to the MSC when the current forward count is greater than or equal to the preset forward count threshold.

Preferably, the HLR is further configured to: after receiving the location request message, determine whether the called number is signed unconditionally forwarded and meets a forwarding condition, and if the signing is unconditionally forwarded and the forwarding condition is met, determining the called number Whether the forward rotation count is less than the preset forward rotation threshold; otherwise, if the called number has a busy forward or no answer forward, the HLR receives the forward number application message sent by the calling MSC, and according to the previous The transfer number application message determines whether the current forward count of the called number is less than a preset forward count threshold.

The method and system for limiting concurrent forwarding proposed by the present invention controls the number of user forwarding times by using a standard home location register (HLR) and a mobile switching center (MSC). Effectively reduce the flood of malicious forwarding; further, reporting the suspicious number on the suspected number can effectively prevent the behavior of the fraudulent user, improve the security of the user, and achieve the purpose of protecting the consumer's rights and interests. DRAWINGS

1 is a schematic structural diagram of an N0.7 network according to an embodiment of the present invention;

2 is a schematic flow chart of an embodiment of a method for limiting concurrent forwarding according to the present invention;

3 is a schematic flow chart of another embodiment of a method for limiting concurrent forwarding according to the present invention;

Figure 4 is a schematic diagram of a forwarding process implemented by a standard protocol;

FIG. 5 is a schematic diagram of a forward flow of an embodiment of a method for limiting concurrent forwarding according to the present invention; FIG. 6 is a schematic structural view of an embodiment of a system for limiting concurrent forwarding according to the present invention. detailed description

In order to make the technical solutions of the present invention clearer and clearer, the following will be further reviewed in conjunction with the accompanying drawings.

The solution of the embodiment of the present invention mainly combines the standard network element MSC in the core network with the HLR, effectively controls the number of user forwarding times, solves the problem of concurrent forwarding, and improves the effectiveness of malicious forwarding behavior control and user security.

The operating environment of the embodiment of the present invention involves a core network based on the N0.7 network. In the N0.7 network structure diagram shown in FIG. 1, the MT (mobile terminal) accesses the core network through the wireless network; MSC (Mobile Switching Center, The mobile switching center, the VLR (Visitor Location Register), the HLR (Home Location Register), and the AUC (Authentication Center) are standard network elements of the core network in the N0.7 network. The MSC is a mobile switching center, responsible for calling and connecting users; the VLR is a visit location register for temporarily storing user subscription information; the HLR is a home location register for permanently saving the user's subscription information and saving the user's location information in real time. ; communication between the core network element MSC, VLR and HLR Communicate over the NO.7 signaling network.

As mentioned above, the current core network cannot control the malicious forwarding behavior according to the standard protocol: The HLR can only determine whether the called user has the forwarding authority, and cannot determine whether the called number may be a malicious number; The routing and connection of the called number cannot detect whether the called number is suspicious.

As shown in FIG. 2, an embodiment of the present invention provides a method for limiting concurrent forwarding based on the foregoing network structure, combining MSC and HLR, including:

5101. The MSC initiates a location request message to the HLR.

The terminal in this embodiment may specifically be a mobile terminal, and the HLR is a called HLR. Similar to the forwarding process of the existing standard protocol, when the terminal wants to establish a call through the core network and the destination terminal where the called number is located, the terminal initiates a call request to the MSC where the call is located, and the call request carries the called number, the MSC. And, according to the call request initiated by the terminal, initiate a location request message to the HLR, so as to establish a call with the called number for the terminal or establish a call forwarding number corresponding to the called number for the terminal when the called number is signed unconditionally forwarded. . This example applies to the application scenario where the called number is the contracted CFU (unconditional forwarding).

After receiving the location request message, the HLR obtains the current forwarding count of the called number and the preset forward counting threshold. When the current forwarding count is greater than or equal to the preset forwarding counting threshold, the HLR sends the HLR to the MSC. Returns a reject response message.

After the HLR returns a reject response message to the MSC, the HLR may send a forward trap alert message to the alert platform.

In order to effectively limit the number of forwarded calls of the called number, the present embodiment controls the establishment of the call by comparing the current forward count of the called number with a preset forward count threshold.

Specifically, after receiving the location request message initiated by the MSC, the HLR finds that the called number is forwarded unconditionally, and the current forwarding number corresponding to the called number is legal, and the current forwarding count of the called number is less than the preset forwarding. The counting threshold is the maximum number of forwards allowed by the system. The HLR will be The current forwarding count of the called number is incremented by one, and the forwarding number is carried in the location request (LOCREQ) response message to the MSC, and the call is established by the MSC to the current forwarding number; when the terminal completes the call with the forwarding number After the call is released, the HLR decrements the forwarded count of the called number by one. If it is determined that the current forwarding count of the called number exceeds the preset forwarding count threshold, the current forwarding is rejected, the terminal cannot connect to the forwarding number corresponding to the current called number, and the alarm message is reported, and the alarm message is sent. It contains the called user's MIN (mobile identification number), the called number, the location information of the called user and the forwarding information, thus effectively controlling the malicious forwarding behavior and preventing possible fraudulent user behavior. Occurs to improve user security.

In the above embodiment, if the called number is contracted for conditional forwarding (such as busy forwarding, no answer forwarding, etc.), the HLR receives the forwarding number application message sent by the calling MSC, and there are two cases: The primary and the called are in the same MSC; 2. The primary and the called are in different MSCs. For the first case, the calling MSC sends the forward number application message directly to the called HLR; for the second case, the called MSC A redirected call request message is sent to the calling MSC, and then the calling MSC sends a forward number application message to the called HLR, and the called HLR determines whether the current forwarding count of the called number is based on the forwarded number application message. Less than the preset forward count threshold.

As shown in FIG. 3, another embodiment of the present invention provides a method for limiting concurrent forwarding based on the foregoing network structure, combining MSC and HLR, including:

51020, the MSC initiates a location request message to the HLR;

51021, when the HLR receives the location request message, it determines whether the current forwarding count of the called number is less than a preset forwarding count threshold; if less, then proceeds to S1022; otherwise, proceeds to S1026; For example, after the HLR receives the location request message, the HLR determines whether the called number is signed unconditionally forwarded and satisfies the forwarding condition. If the contract is forwarded unconditionally and the forwarding condition is satisfied, the current forwarding count of the called number is determined. Whether it is less than the preset forward counting threshold, if yes, then proceeds to S1022; otherwise, proceeds to S1026.

If the called number has a busy forward or no answer forward, the HLR receives the call from the calling MSC. Transmitting the number application message, and determining, according to the forwarding number application message, whether the current forwarding count of the called number is d, and is at a preset forward counting threshold.

51022, the HLR sends the current forwarding number corresponding to the called number to the MSC in the location request response message, and increases the current forwarding count of the called number by one;

51023, the MSC connects the terminal call to the current forwarding number according to the received location request response message, and establishes a call;

51024. After the call is released, the MSC sends a forward number application message to the HLR to notify the HLR that the forward call is terminated;

51025, the HLR decrements the forwarded count of the called number by one, and returns a forward number request response message to the MSC.

51026, the HLR returns a reject response message to the MSC, prohibits the forwarding of the called number, and reports the alarm message.

In the following, User A is the terminal of the embodiment, and User B is the destination terminal where the called number is used to describe the forwarding process of the standard protocol forwarding process and the method for limiting concurrent forwarding in this embodiment:

As shown in Figure 4, the standard protocol forwarding process is:

521, user A dials the called number DN, and initiates a location application operation to the core network;

522. After receiving the location request message, the MSC_A sends a location request (LOCREQ) operation to the HLR (HLR_A) where the DN is located;

523, after receiving the location request (LOCREQ) message, the HLR_A finds that the DN subscription has no conditional forwarding (CFU) and satisfies the forwarding condition, and then the forwarding number (DN1) is brought to the MSC_A through the location application response message;

524. The MSC_A initiates a location request (LOCREQ) operation to the HLR (HLR_B) where the DN1 is located;

525, HLR_B After receiving the location request (LOCREQ) message, it is found that DN1 is registered in On MSC_B, a routing request (ROUTREQ) message is sent to MSC_B;

526, after receiving the route request message, the MSC_B allocates the TLDN1 and brings it to the HLR_B in the route request response;

527, HLR_B brings TLDN1 to MSC_A in the location request response message;

528, MSC_A connects the voice path to MSC_B through TLDN1;

529, call setup.

As shown in FIG. 5, this embodiment limits the concurrent forwarding process to:

531, user A dials the called number DN, and initiates a location application operation to the core network;

532. After receiving the location request message, the MSC_A sends a location request (LOCREQ) operation to the HLR (HLR_A) where the DN is located;

533. After receiving the location request (LOCREQ) message, the HLR_A finds that the DN contract is forwarded unconditionally and satisfies the forwarding condition, and the current forwarding number of the user B is less than the maximum number of forwards specified by the system, and then the forwarding number (DN1) is forwarded. Passing the location request response to MSC_A and incrementing the number of forwards of the user by one;

534. MSC_A initiates a location request (LOCREQ) operation to the HLR (HLR_B) where DN1 is located;

535. After receiving the location request (LOCREQ) message, the HLR_B finds that the DN1 is registered on the MSC_B, and then sends a route request (ROUTREQ) message to the MSC_B.

536, after receiving the route request (ROUTREQ) message, MSC_B allocates TLDN1 and brings it to HLR_B in the route request response;

537, HLR_B brings TLDN1 to MSC_A in the location request response message;

538, MSC_A connects the voice path to MSC_B through TLDN1;

539, call setup;

540, the call is released after the call is completed;

541, MSC_A sends a forwarding number application (TRANUMREQ) to the HLR_A where the DN is located. Notifying the end of the HLR_A forwarding session, where the parameter RedirectionReason has a value of 9 (the value is a protocol extension, indicating Call Forward);

S42. After receiving the forwarding number application, the HLR_A finds that the parameter RedirectionReason value is 9, and reduces the number of forwards of the user B by one, and returns a forwarding number to the MSC_A to apply for a response.

In the above S33, if the HLR finds that the number of forwards of the DN user is equal to or greater than the maximum number of forwards allowed by the current system, the MSC_A returns a location request response, where the parameter AccessDeniedReason has a value of 4 ( Termination Denied ).

By comparing the embodiment of the present invention with the forwarding process of the standard protocol, the method of the present invention can effectively control the number of user forwarding times by using a standard home location register (HLR) and a mobile switching center (MSC). To reduce the proliferation of malicious forwards, to achieve the purpose of protecting consumer rights; and only to expand the corresponding parameters of the standard protocol, make full use of network resources, and save system costs.

As shown in FIG. 6, an embodiment of the present invention provides a system for limiting concurrent forwarding based on the N0.7 network structure shown in FIG. 1, including an MSC 501 and an HLR 502 in the same core network, and the terminal 503 is wireless. The network access to the core network is connected to the MSC 501, where:

The terminal 503 in this embodiment is specifically a mobile terminal.

In this embodiment, the MSC 501 is configured to initiate a location request message to the HLR 502 according to the terminal 503 call request.

After receiving the location request message initiated by the MSC 501, the HLR 502 obtains the current forwarding count of the called number and the preset forwarding count threshold, when the current forwarding count is greater than or equal to the preset forwarding count threshold. At this time, a rejection response message is returned to the MSC 501, and the forwarding of the called number is prohibited.

The terminal 503 initiates a call request to the MSC 501 where the call is located, and the call request carries the called number in the call request. The MSC 501 initiates a location request message to the HLR 502 according to the call request initiated by the terminal, so as to establish a call with the called number for the terminal 503 or when called. When the number signing is unconditionally forwarded, the terminal 503 establishes a call of the forwarding number currently corresponding to the called number. This application is applicable to the application scenario where the called number is the unconditional forwarding of the contract, and is also applicable to the application scenario where the called number is conditional forwarding. When the called number is signed, the condition is forwarded (such as busy forwarding, no The response forwards, etc., the HLR 502 receives the forward number application message sent by the calling MSC, where there are two cases: 1. The primary and the called are in the same MSC; 2. The primary and the called are in different MSCs, In one case, the calling MSC directly sends a forward number application message to the called HLR; for the second case, the called MSC sends a redirected call request message to the calling MSC, and then the calling MSC sends a forward. The number application message is sent to the called HLR, and the called HLR determines whether the current forwarding count of the called number is less than the preset forwarding count threshold according to the forwarding number application message.

In order to effectively limit the number of forwarded calls of the called number, the present embodiment controls the establishment of the call by comparing the current forward count of the called number with a preset forward count threshold. Specifically, the unconditional forwarding of the called number is taken as an example. After receiving the location application message, the HLR 502 determines whether the called number is signed unconditionally forwarded and satisfies the forwarding condition, and if the signing is unconditionally forwarded and the forwarding condition is met, Then, it is determined whether the forwarded count of the called number is less than a preset forward counting threshold. If less than, the HLR 502 carries the current forwarding number corresponding to the called number in the location request response message and sends it to the MSC 501, and The current forward count of the called number is incremented by one; if not less than, the current forward count is greater than or equal to the preset forward count threshold, the HLR 502 returns a reject response message to the MSC 501, prohibiting the forward of the called number. And report the police message. If the called number has a busy forwarding or no answer forwarding, the HLR receives the forwarding number application message sent by the calling MSC, and determines, according to the forwarding number application message, whether the current forwarding count of the called number is less than a preset. The forward count threshold.

When the current forwarding count is less than the preset forward counting threshold, the MSC 501 connects the terminal 503 to the current forwarding number according to the received location request response message to establish a call; when the call is released, the MSC 501 sends the message to the HLR 502. Transfer number application message, notify HLR 502 to call forward Called the end. After receiving the forward number application message sent by the MSC 501, the HLR 502 decrements the current forwarding count of the called number by one, and returns a forward number application response message to the MSC 501. Forwarding in this embodiment includes domestic forwarding and/or international forwarding.

The HLR 502 is further configured to send the forward trap alarm information to the alarm platform after returning the reject response message to the MSC 501 when the current forward count is greater than or equal to the preset forward count threshold.

The method and system for limiting concurrent forwarding proposed by the embodiment of the present invention controls the number of user forwarding times by using a standard home location register (HLR) and a mobile switching center (MSC), thereby effectively reducing the flood of malicious forwarding; Some suspicious numbers are reported to be reported, which can effectively prevent the occurrence of fraudulent users, improve the security of users' use, and achieve the purpose of protecting consumers' rights and interests.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and equivalent structural or process changes made by the present specification and drawings may be directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

Claim

A method for limiting concurrent forwarding, characterized in that it comprises:

The mobile switching center MSC initiates a location request message to the home location register HLR; after receiving the location request message, the HLR obtains a current forwarding count of the called number and a preset forwarding count threshold, when the current forwarding count is When greater than or equal to the preset forward count threshold, the HLR returns a reject response message to the MSC.

2. The method according to claim 1, further comprising:

The MSC establishes a call by connecting the terminal call to the current forwarding number according to the received location request response message.

3. The method according to claim 2, wherein after the establishing the call, the method further comprises:

After the call is released, the MSC sends a forward number application message to the HLR to notify the HLR that the forward call is over;

The HLR decrements the forwarded count of the called number by one and returns the forwarded number request response to the MSC.

The method according to claim 1, 2 or 3, wherein, when the current forward rotation count is greater than or equal to a preset forward rotation threshold, the HLR returns a rejection response message to the MSC. Includes:

The HLR sends forward trap alarm information to the alarm platform.

5. The method according to claim 2, further comprising:

After the HLR receives the location request message, the HLR determines whether the called number is signed or not. Forwarding and satisfying the forwarding condition, if the contract is unconditionally forwarded and the forwarding condition is satisfied, the step of determining whether the current forwarding count of the called number is less than the preset forwarding counter threshold is performed; otherwise, if the called number occurs In case of busy forwarding or no answer forwarding, the HLR receives the forwarding number application message sent by the calling MSC, and determines whether the current forwarding count of the called number is smaller than the preset forwarding counting valve according to the forwarding number application message. value.

A system for limiting concurrent forwarding, comprising: an MSC and an HLR in a same core network, wherein the terminal accesses the core network through a wireless network, where:

The MSC, configured to initiate a location request message to the HLR;

The HLR is configured to obtain a current forwarding count of the called number and a preset forwarding count threshold after receiving the location request message initiated by the MSC, where the current forwarding count is greater than or equal to a preset When the count threshold is forwarded, a reject response message is returned to the MSC.

7. The system of claim 6 wherein:

The HLR is further configured to: after receiving the location request message, determine that the current forwarding count of the called number is less than a preset forwarding count threshold, and then carry the current forwarding number corresponding to the called number in the location. The application response message is sent to the MSC, and the current forwarding count of the called number is incremented by one; the MSC is further configured to connect the terminal call to the current forwarding number according to the received location request response message, and establish a call.

The system according to claim 7, wherein the HLR is further configured to: after the call is released, receive a forward number application message sent by the MSC, and reduce the current forwarding count of the called number by one, and The MSC returns a forward number application response message;

The system according to claim 6, 7 or 8, wherein the HLR is further configured to return a rejection response to the MSC when the current forward rotation count is greater than or equal to a preset forward rotation threshold. After the message, send forward trap alarm information to the alarm platform.

The system according to claim 6, 7 or 8, wherein the HLR is further configured to: after receiving the location request message, determine whether the called number is signed unconditionally forwarded and meets a forwarding condition, If the contract is forwarded unconditionally and the forward condition is met, it is determined whether the forwarded count of the called number is less than the preset forward counting threshold; otherwise, if the called number has a busy forward or no answer forward, the HLR receives The forwarding number application message sent by the calling MSC, and determining, according to the forwarding number application message, whether the current forwarding count of the called number is less than a preset forwarding count threshold.