Method, device and system for identifying illegal packet phones

A grouping telephone and user technology, applied in transmission systems, digital transmission systems, secure communication devices, etc., can solve problems such as difficulty in implementation, complex analysis, and impact on network performance, and achieve the effect of easy implementation and simple analysis

Inactive Publication Date: 2007-03-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] It can be seen from this process that the existing method for identifying illegal VoIP users is to collect and analyze the data packets of a specific port on the IP telephone gateway, and the analysis of the data packets and the statistics of the number of sessions need to be performed in the background In the case of huge network traffic, this will undoubtedly seriously affect network performance; in addition, the existing methods need to analyze protocol layer information such as session flags and session time, and also perform statistical analysis on the number of sessions. Therefore, the analysis is complicated and the implementation is difficult, which seriously affects the packet forwarding performance.

Method used

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  • Method, device and system for identifying illegal packet phones
  • Method, device and system for identifying illegal packet phones
  • Method, device and system for identifying illegal packet phones

Examples

Experimental program
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Embodiment Construction

[0042] In order to make the features and advantages of the present invention clearer, the present invention will be further described below in conjunction with specific embodiments with reference to the accompanying drawings.

[0043] Since the H.323, H.248, MGCP and SIP protocols used by the VoIP telephone service all use RTP to carry voice data, the present invention monitors the number of RTP channels carrying voice data.

[0044] To monitor the number of RTP channels, it is first necessary to identify RTP data packets. See Table 1 for RTP data packets.

[0045] IP header

UDP header

Application layer data (including RTP data)

[0046] Table 1

[0047] It can be seen from Table 1 that the RTP data packet may include an IP header, a User Datagram Protocol (UDP) header and application layer data containing RTP data. Among them, the IP header includes the protocol type, source IP address and destination IP address. Among them, the protocol type is use...

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Abstract

This method includes that: captures user text, matches it with the character of RTP data text, according to the match result, confirms if it is RTP data text, records the 5-element group info of RTP data text, according to the change situation of other 4 items info with the same source IP address in the recorded 5-element group info, recognize the illegal VoIP user. The device recognizing illegal grouping phone user includes FPGA transmission logic chip and content addressing storage. The system recognizing illegal grouping phone user includes the device involving FPGA transmit logic chip and content addressing storage. This method, device and system can recognize simply illegal grouping phone user without interrupting text transfer.

Description

technical field [0001] The invention relates to the field of packet telephone (VoIP), in particular to a method, device and system for identifying illegal VoIP users. Background technique [0002] With the development of the Internet, the application of VoIP technology is increasing rapidly. VoIP technology is a packetized and digital transmission technology based on Internet Protocol (IP) technology. Its basic principle is: compress and encode voice signals through voice compression algorithms, and then package these voice signals according to IP and other related protocols. , transmit the data packets to the receiving place through the IP network, and then string these data packets together, and restore the original voice signal after decoding and decompression processing, so as to achieve the purpose of transmitting voice through the IP network. [0003] Although the development of VoIP technology is very fast, the traditional public switched telephone network (PSTN) is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L9/00H04L12/56H04L29/06
Inventor 李猛施强罗成曾宪戈罗宏芳王哲朱可楚张仁静
Owner HUAWEI TECH CO LTD
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