Lawful interception method for internetwork telephone domain and system thereof

A technology of legal interception and telephone domain, applied in the field of communication, can solve the problems of inconvenient centralized management of legal interception function and high cost of operator's internal server transformation, and achieve the effect of saving cost, improving performance and improving communication performance

Active Publication Date: 2010-06-16
CHINA INTERNET NETWORK INFORMATION CENTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that this is not convenient for centralized management of the legal intercepti

Method used

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  • Lawful interception method for internetwork telephone domain and system thereof
  • Lawful interception method for internetwork telephone domain and system thereof
  • Lawful interception method for internetwork telephone domain and system thereof

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Embodiment Construction

[0067] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] One of the core ideas of the preferred embodiment of the present invention is: first, utilize the SBC to realize the intercommunication of many VoIP operators based on the SIP protocol, intercept and analyze the received SIP signaling at the SBC, and then analyze the SIP signaling related to the legally intercepted user. The order is modified, repackaged for routing, and then the real-time interception of RTP media stream can be realized through the legal monitoring module added to the routing function of SBC. Specifically, the present invention utilizes the feature of SBC to realize trusted intercommunication among numerous VoIP operators to implement legal interception, that is, all VoIP operators based on the SIP protocol...

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Abstract

The invention provides a lawful interception method for internetwork telephone domain. The method comprises configuring lawful interception parameters; receiving and analyzing the cross-domain conversation request of the network telephone operator server by a conversation margin controller, judging whether the current cross-domain call is in the lawful interception range; if yes, preserving the conversation request and executing the following steps; if no, completing addressing and routing according to regular flow; when the interception data type is conversation parameter, performing the route relay of the current cross-domain call by the conversation margin controller; when the interception data type is media stream information, modifying the addresses of the calling subscriber and the called subscriber into the address of the conversation margin controller, starting the media stream interception progress and preserving the intercepted media stream. The invention can be applied among any VoIP operators based on SIP out of the limitation of media format of the conversation subscribers, and can perform lawful interception to the real-time text, voice or video information and the like simultaneously.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and system for realizing lawful interception across VoIP (Voice Over Internet Protocol) domains by means of a Sessions Border Controller (SBC, Sessions Border Controller). Background technique [0002] With the rapid development of the communication industry and continuous technological innovation, VoIP has become the mainstream voice communication technology. VoIP has irreplaceable advantages of traditional telephones. VoIP can widely use the Internet and Internet Protocol (IP, Internet Protocol). Cheaply transmit services such as voice, fax, video and data, such as unified messaging, virtual phone, virtual voice / fax mailbox, directory service, Internet call center, Internet call management, video conferencing, e-commerce, fax storage and forwarding and various Information storage and forwarding, etc. However, due to security reasons, the VoIP lawful interception ...

Claims

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Application Information

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IPC IPC(8): H04M7/00H04M3/22H04L29/06
Inventor 毛伟李晓东杨孟辉陈远民张伟郭斌
Owner CHINA INTERNET NETWORK INFORMATION CENTER
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