WO2013091492A1

WO2013091492A1 - Method and device for limiting fraudulent calls of false caller

Info

Publication number: WO2013091492A1
Application number: PCT/CN2012/086324
Authority: WO
Inventors: 曹炜
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-12-20
Filing date: 2012-12-11
Publication date: 2013-06-27
Also published as: CN103179568A

Abstract

Disclosed are a method and device for limiting fraudulent calls of a false caller, which are used for effectively detecting a fraudulent call behaviour of a false call, limiting illegal activities and improving the image of operators and the satisfaction of users. The present invention identifies whether the current call is a false call by carrying out legality detection on a gateway mobile switching centre (GMSC) address and a signalling source address at a home location register (HLR) and carrying out validity detection on the calling number, thereby effectively limiting the fraudulent call behaviour of a false call, limiting the activities of outlaws and improving the image of operators and the satisfaction of users.

Description

Method and device for restricting false caller fraudulent telephone

The present invention relates to the field of mobile communications, and more particularly to a method and apparatus for restricting false caller fraud calls. Background technique

With the development of modern communication technologies, especially the development of softswitch technology, IP phones have begun to be used on a large scale, and users can access the communication network through a software to complete call services such as voice or video. The development of new technologies has brought great convenience and good business experience to users, but it has also brought new problems: Many criminals use software technology to make random calls and arbitrarily modify the calling party's phone number. Conducting criminal activities such as telephone fraud and causing adverse effects on society.

In the current mobile communication network, due to the lack of technical specifications, the system equipment in the network does not consider the scene generated by the fake calling telephone, and cannot intercept and suppress the false calling party.

There are two main scenarios in the technical principle of false caller calls:

(1) The calling party communication system accesses to a telecommunications carrier by a means such as an IP port, and the calling system simulates the mobile switching center (MSC) to initiate a home location register (HLR) of another operator. The called party's call routing query, the called party's HLR does not verify the calling party's MSC, requests the roaming number from the visited location register (VLR) of the user and returns it to the calling party. The calling party system modifies through the software. The calling number is any number and the call is completed. The signaling process is shown in Figure 1.

Step 101: The calling party system accesses the communication network through the operator A, and initiates a call routing query Send Routing Info request to the operator B segment HLR, and the request message is first routed to the gateway B mobile switching center (GMSC) of the operator B. ; Step 102: The GMSC of the operator B routes the call routing query Send Routing Info request message to the home HLR.

Step 103: The HLR sends a roaming number request to the VMSC where the called user is located, a Provide Roaming Number message, requesting a roaming number;

Step 104: The VMSC returns a Provide Roaming Number request response message to the HLR, carrying the assigned roaming number (MSRN);

Step 105: The HLR returns a Send Routing Info response message to the calling end, and carries the roaming number, and the signaling message is first routed to the gateway GMSC;

Step 106: The operator B gateway office GMSC routes the response message to the calling party system; Step 107: The calling party system sends identity identification and access management to the called VMSC

(IMM) The message is connected to the call. The message carries the fake calling number and the called party's roaming number to complete the call connection process.

(2) For the first scenario, if the control signaling between the calling party system and the calling party's home HLR is unreachable, the calling party system directly connects to the gateway office of the called party operator through the IAM message. The calling number is filled in as the number of the carrier number of the called party, and then the called party's gateway office completes the call connection. The signaling process is shown in Figure 2.

Step 201: The calling party system accesses the communication network through the operator A, and sends the IAM to the GMSC of the operator B. The message carries the fake carrier B number as the calling number and the called number.

Step 202: The GMSC of the operator B initiates a call routing query to the home location register HLR, a Send Routing Info request;

Step 203: The HLR sends a Provide Roaming Number request message to the VMSC where the called user is located, requesting a roaming number;

Step 204: The VMSC returns a Provide Roaming Number request message to the HLR, and carries the assigned roaming number. Step 205: The HLR returns a Send Routing Info response message to the GMSC, and carries the roaming number.

Step 206: The GMSC connects the IAM message to the VMSC where the called party is located, and the message carries the fake calling number and the roaming number of the called party to complete the call connection process. Summary of the invention

In view of this, the main object of the present invention is to provide a method and apparatus for restricting false caller fraudulent calls, for effectively detecting fraudulent telephone behavior of false calls, restricting illegal activities, and improving operator image and user satisfaction.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for limiting a virtual ^calling fraudulent call, the method comprising:

After receiving the call routing query request Send Routing Info message initiated by the local operator gateway switching center GMSC, the home location register HLR determines whether the GMSC address carried by the call routing query request message and the source address of the signaling message are legal. If it is not legal, the call flow is rejected. Otherwise, the HLR obtains the calling number carried in the message from the call routing query request message, and determines whether the calling number is valid. If it is valid, the current call is allowed, otherwise the call is rejected. .

Further, the determining whether the GMSC address carried by the call routing query request message and the source address of the signaling message are legal:

Obtaining a GMSC address carried by the call routing query request message and a source address of the signaling message, if the address of the GMSC address and the source address of the signaling message is not a valid network element address of the operator, determining The GMSC address and the source address of the signaling message are invalid, otherwise the GMSC address and the source address of the signaling message are determined to be legal.

Further, determining whether the calling number is valid is:

The HLR queries the calling party information of the calling number, determines whether the calling number is a local carrier number, and if it is a non-local carrier number, determines that the calling number is invalid, otherwise determining To be effective.

Further, determining whether the calling number is valid further includes:

When the calling number is a local carrier number, it is determined whether the calling number is a number that the operator has delivered. If the calling number is an unserved number, it is determined that the calling number is invalid, otherwise the calling number is determined. effective.

Further, determining whether the calling number is valid further includes:

When the calling number is a local carrier number and the calling number is a served number, querying the current location of the calling party and analyzing whether the calling from the current location of the calling party needs to send the call routing query request message The GMSC, if not required, the calling number is invalid, otherwise it is determined to be valid.

The present invention also provides an apparatus for limiting a false caller's call, the apparatus being located in the HLR, including:

The call address legality judging module is configured to determine whether the GMSC address carried in the Send Routing Info message and the source address of the signaling message are legal from the call routing inquiry request initiated by the GMSC in the local exchange gateway switching center;

a calling number validity determining module, configured to: obtain, when the GMSC address and the source address of the signaling message are valid, the calling number carried in the message from the call routing query request message, and determine the Whether the calling number is valid;

The call processing module is configured to allow the current call process when determining that the GMSC address and the source address of the signaling message are valid, and determining that the calling number carried in the call routing query request message is valid, otherwise rejecting the current call Call flow.

Further, the call address legality determining module includes:

An address obtaining submodule, configured to obtain a GMSC address carried by the call routing query request message and a source address of the signaling message;

a legality judging submodule, configured to determine the GMSC address or a source address of the signaling message Whether it is the network element address that is valid for the operator, if any of the GMSC address and the source address of the signaling message is not the effective network element address of the operator, determining the GMSC address and the signaling message The source address is invalid, otherwise the GMSC address and the source address of the signaling message are determined to be legal.

Further, the calling number validity determining module includes:

a first determining sub-module, configured to query the calling party information of the calling number, determine whether the calling number is a local carrier number, and if it is a non-local carrier number, determine that the calling number is invalid, otherwise It is determined that the calling number is valid.

Further, the calling number validity determining module further includes:

a second determining sub-module, configured to determine, when the calling number is a local carrier number, whether the calling number is a number that the operator has delivered, and if the calling number is an unsold number, determining the calling number Invalid, otherwise it is determined that the calling number is valid.

Further, the calling number validity determining module further includes:

The third determining sub-module is configured to: when the calling number is a local carrier number, and the calling number is a published number, query the current location of the calling party and analyze whether the call originating from the current location of the calling party needs to be The GMSC that sends the call routing inquiry request message determines that the calling number is invalid if not required, otherwise determines that the calling number is valid.

The invention detects the legality of the GMSC address and the signaling source address at the HLR, and checks the validity of the calling number to identify whether the current call is a false call, thereby effectively limiting the fraudulent telephone behavior of the fake call, and limiting the criminals. Activities to improve operator image and user satisfaction. DRAWINGS

FIG. 1 is a signaling flow of an existing false caller fraud telephone scenario 1;

2 is a signaling flow of the scenario 2 of the existing false caller fraudulent telephone;

FIG. 3 is a flowchart of a method for limiting a false caller's call by the present invention; FIG. 4 is a schematic structural diagram of an apparatus for restricting a false caller's call. detailed description

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

FIG. 3 is a schematic diagram of a method for restricting a false caller fraudulent call according to the present invention. The method relates to an HLR network element and a GMSC network element in a mobile communication network, and specifically includes the following steps: Step 301: When the GMSC receives other operations After the incoming call message of the quotient, the call routing query request Send Routing Info message is sent to the HLR to obtain routing information, where the call routing query request message carries the number of the calling party;

Step 302: After receiving the Send Routing Info request message initiated by the GMSC, the HLR obtains the GMSC address carried by the call routing query request message and the source address of the signaling message, and determines the GMSC address and the signaling message. If the source address is a valid network element address of the carrier, if the GMSC address or the source address of the signaling message is not a valid network element address of the local operator, the HLR rejects the current call procedure; if the GMSC address Or the source address of the signaling message is legal, then step 303 is performed;

In a certain carrier network, the HLR registers all network element addresses belonging to the local operator, and the registered network element address includes all MSC addresses, which also includes the mobile switching center GMSC address of the local operator's gateway office. Therefore, in this step, after obtaining the GMSC address carried in the call routing query request message and the source address of the signaling message, the network address of the registered carrier, that is, the effective network element address of the operator, may be adopted. - Aligning to determine whether the GMSC address and the source address of the signaling message are valid network element addresses of the operator. The one of the GMSC address and the source address of the signaling message is not the carrier effective network element address, and the HLR rejects the current call procedure.

Step 303: The HLR obtains the calling number carried in the message from the call routing query request message, and then further queries the calling party information of the calling number to determine whether the calling number has Effect, if it is valid, the call is allowed, otherwise the call is rejected.

The calling information includes status information of the calling number, current location information of the calling party, and the like; and determining whether the calling number is valid may be determined by:

(1) determining whether the calling number is the carrier number, and if it is not the local carrier number, the calling number is invalid;

(2) On the premise that the calling number is the local carrier number, continue to determine whether the calling number is the number that the operator has delivered. If the calling number has not been delivered to the public or a special user, the calling number Invalid;

(3) on the premise that the above two conditions are met, query the current location of the calling party, and analyze whether the GMSC is required to send a call request message through the call originating request from the current location of the calling party, if not, then The calling number is invalid, otherwise it is judged to be valid.

For example: When the user corresponding to the calling number roams locally, but the actual call is connected through the external gateway port, the call is a fake call and the call should be rejected.

FIG. 4 is a device 400 for limiting a false caller's call, and the device is located in the HLR, and includes: a call address legality determining module 410, a calling number validity determining module 420, and a call processing module 430. .

The call address legality judging module 410 is configured to determine whether the GMSC address carried in the Send Routing Info message and the source address of the signaling message are legal from the call routing inquiry request initiated by the local operator gateway mobile switching center (GMSC);

The present invention requires that when the GMSC receives the incoming call message of another operator, the call routing query request Send Routing Info message sent to the HLR carries the number of the calling party;

The calling number validity determining module 420 is configured to: when the GMSC address and the source address of the signaling message are valid, obtain the calling number carried in the message from the call routing query request message, and determine Whether the calling number is valid;

a call processing module 430, configured to determine the GMSC address and a source of the signaling message If the address is valid, and it is determined that the calling number carried in the call routing query request message is valid, the current call process is allowed, otherwise the call flow is rejected.

The call address legality determining module 410 further includes:

An address obtaining submodule 411, configured to acquire a GMSC address carried by the call routing query request message and a source address of the signaling message;

The legality judging sub-module 412 is configured to determine whether the GMSC address or the source address of the signaling message is a valid NE address of the operator, if the GMSC address and any address of the source address of the signaling message If the network element address is not valid, the GMSC address and the source address of the signaling message are determined to be invalid. Otherwise, the determination is legal.

The calling number validity determining module 420 further includes one or more of the following modules: a first determining submodule 421, a second determining submodule 422, a third determining submodule 423, and a first determining submodule 421, Querying the calling party information of the calling number, determining whether the calling number is a local carrier number, and if it is a non-local carrier number, determining that the calling number is invalid; otherwise, determining the calling number effective.

The second determining sub-module 422 is configured to determine, when the calling number is a local carrier number, whether the calling number is a number that the operator has delivered; if the calling number is an unserved number, determine the calling The number is invalid. Otherwise, it is determined that the calling number is valid.

The third determining sub-module 423 is configured to: when the calling number is a local carrier number and the calling number is a published number, query the current location of the calling party and analyze whether a call is initiated from the current location of the calling party. The GMSC that sends the call routing inquiry request message, if not required, determines that the calling number is invalid; otherwise, it is determined to be valid.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for restricting a false caller's call, the method comprising: the home location register HLR receiving a call routing query request Send Routing Info message initiated by the local operator gateway exchange switching center GMSC Determining whether the GMSC address carried by the call routing query request message and the source address of the signaling message are legal, and if not, rejecting the current call procedure; otherwise, the HLR obtains the message carrying the message from the call routing query request message. The calling number, and determine whether the calling number is valid. If it is valid, the call is allowed; otherwise, the call is rejected.

The method according to claim 1, wherein the determining the GMSC address carried by the call routing query request message and the source address of the signaling message is legal: obtaining the call routing query request message Determining the GMSC address and the signaling if the GMSC address and the source address of the signaling message are any one of the GMSC address and the source address of the signaling message is not the effective network element address of the operator. The source address of the message is invalid; otherwise, the GMSC address and the source address of the signaling message are determined to be valid.

The method according to claim 1, wherein the determining whether the calling number is valid is:

The HLR queries the calling party information of the calling number, determines whether the calling number is a local carrier number, and if it is a non-local carrier number, determines that the calling number is invalid; otherwise, determines the calling number. effective.

The method according to claim 3, wherein the determining whether the calling number is valid further comprises:

When the calling number is a local carrier number, it is determined whether the calling number is a number that the operator has delivered. If the calling number is an unserved number, it is determined that the calling number is invalid; otherwise, the calling party is determined. The number is valid.

The method according to claim 4, wherein the determining that the calling number is Validity also includes:

When the calling number is a local carrier number and the calling number is a served number, querying the current location of the calling party, and analyzing whether the call is initiated by sending the call routing request from the current location of the calling party The GMSC of the message, if not required, the calling number is invalid; otherwise, it is determined that the calling number is valid.

6. A device for restricting a false caller to spoof a call, wherein the device is located in the HLR, and includes:

a call processing module, configured to allow the current call flow when determining that the GMSC address and the source address of the signaling message are legal, and determining that the calling number carried in the call routing query request message is valid; otherwise, rejecting the call Second call.

The device according to claim 6, wherein the call address legality judging module comprises:

a legality judging sub-module, configured to determine whether the GMSC address or the source address of the signaling message is a valid network element address of the operator, if any of the GMSC address and the source address of the signaling message is not If the network address of the operator is valid, the source address of the GMSC and the source address of the signaling message is determined to be invalid; otherwise, the GMSC address and the source address of the signaling message are determined to be legal.

8. The apparatus according to claim 6, wherein the calling number validity determination module comprises:

a first determining sub-module, configured to query the calling party information of the calling number, determine whether the calling number is a local carrier number, and if it is a non-local carrier number, determine that the calling number is invalid; , determining that the calling number is valid.

9. The apparatus according to claim 8, wherein the calling number validity determination module further comprises:

a second determining sub-module, configured to determine, when the calling number is a local carrier number, whether the calling number is a number that the operator has delivered, and if the calling number is an unsold number, determining the calling number Invalid; otherwise, it is determined that the calling number is valid.

10. The apparatus according to claim 9, wherein the calling number validity determining module further comprises:

The third determining sub-module is configured to: when the calling number is a local carrier number, and the calling number is a published number, query the current location of the calling party, and analyze whether a call is initiated from the current location of the calling party. The GMSC that sends the call routing inquiry request message, if not required, determines that the calling number is invalid; otherwise, it determines that the calling number is valid.