Method and system for legally monitoring IP multimedia subsystem network

A multimedia subsystem, lawful interception technology, applied in transmission systems, network connections, digital transmission systems, etc., can solve problems such as difficulties in development and engineering implementation, difficulty in implementing interception in the IMS field, and lack of media copying functions. complexity, reducing the effect of variation

Inactive Publication Date: 2008-01-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The network elements shown in Figure 1 can be divided into control layer network elements and bearer layer network elements. It is difficult to require them to provide monitoring functions from the perspective o...

Method used

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  • Method and system for legally monitoring IP multimedia subsystem network
  • Method and system for legally monitoring IP multimedia subsystem network
  • Method and system for legally monitoring IP multimedia subsystem network

Examples

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Embodiment Construction

[0028] The present invention provides a system for realizing legal monitoring of the IMS system, as shown in Figure 2, mainly including LIG AS, S-CSCF, LEMF (legal enforcement monitoring equipment), wherein,

[0029] The S-CSCF is connected to the LIG AS, and provides the function of triggering monitoring to the LIG AS server and the X2 monitoring interface function.

[0030] In order to ensure specific monitoring service processing, the S-CSCF should decide whether the LIG AS server is required to receive information related to incoming SIP session requests, that is, the S-CSCF assigns the monitoring service to an independent external LIG according to the information situation. AS server to process.

[0031] The S-CSCF's decision may be based on interception information received from the HSS (Home Subscriber Server) (this information may be partially filtered). The filtering information is stored and transmitted according to each monitoring user information.

[0032] The ad...

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Abstract

The present invention provides an IP multimedia subsystem network legal monitoring method and system. The method comprises the following steps: (a) after the calling session controlling function CSCF receives the session initiation protocol SIP message, if the monitoring is necessary, the SIP message is transferred to the monitoring gateway application server; b) the monitoring gateway application server receives the SIP message, the calling agent interface and the called agent interface of the calling are distributed on ten monitoring gateway application server, the SIP message of the calling is modified, the calling interface message is modified into the calling agent interface message to be transmitted to the caller, and the called interface message is changed into the called agent interface message to be transmitted to the caller; c) the media flow between the caller and the called party are respectively transmitted to the called agent interface or the caller agent interface of the monitoring gateway application server, the monitoring gateway application server copies the media flow and transmits to the law enforced monitoring facility LEMF.

Description

technical field [0001] The invention relates to the field of IP Multimedia Subsystem (IMS) communication, in particular to a method and system for IP Multimedia Subsystem network lawful monitoring. Background technique [0002] IMS communication technology is the development direction of communication in the future, and the research on IMS lawful interception is also a relatively popular research topic in the field of interception research. In the IMS communication architecture, the control layer equipment is completely separated from the bearer layer equipment. However, in the existing standard protocol, it is suggested that the monitoring and triggering of the controlled user should be realized on the control layer device, and the monitoring and control of the media stream should be realized on the media layer device (i.e., the bearer layer device); however, some control layer devices cannot directly output The content of the alleged target's communications. This is an i...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/66H04L12/58
Inventor 熊钢宋金东孟昱
Owner ZTE CORP
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