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Method for recognizing RTP media stream in network

A technology for identifying networks and media streams, applied in the field of network communications, can solve the problems of inability to parse signaling data packets, complex implementation, and low efficiency, and achieve the effects of improving identification and detection efficiency, simple implementation, and overcoming complexity.

Inactive Publication Date: 2009-06-24
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is not difficult to see that, first of all, since a lot of signaling is a private protocol, the detector may not be able to parse all the signaling packets, making the possibility of missed detection very high
[0005] At the same time, since the interaction of signaling needs to be tracked in the above-mentioned detection and identification process, the implementation of the entire detection and identification process is relatively complicated and the efficiency is low

Method used

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  • Method for recognizing RTP media stream in network
  • Method for recognizing RTP media stream in network

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Experimental program
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Embodiment Construction

[0030] In the specific implementation process of the present invention, the identification of the RTP media stream is carried out according to the characteristic information of the service package of the RTP media stream. For this reason, the characteristics of the RTP stream in the IP network are firstly introduced.

[0031] The format of the described RTP protocol message is as shown in table 1:

[0032] Table 1

[0033]

[0034] in:

[0035] V: Version number (Version): The current version is 2, which can be regarded as a fixed value;

[0036] P: padding flag (Padding): generally 0;

[0037] X: Extension bit: generally 0; if this bit is 1, an extension header needs to be added to the data packet;

[0038] CC: the number of contribution sources: the general value is 0;

[0039] M: flag, non-fixed value, the flag is defined by the Profile file, the profile can change the length of this bit, but keep the total length of it and PT (payload type, payload type) unchanged, ...

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Abstract

The invention relates to a method for identifying RTP media streams in a network. The method mainly includes: firstly, determining the difference between the service message of the real-time transport protocol RTP media stream transmitted in the network and the unique feature information of other protocol service messages; then, according to the unique feature information, it can identify the The transmitted RTP service message, such as whether the first byte of the message matches the value of the first byte of the RTP message, the actual number of data bytes in the message and the number of data bytes determined by the RTP message Does it match etc. Therefore, the present invention can carry out identification processing of RTP media stream only through one data packet, thus can effectively overcome the complexity of locating RTP stream through signaling stream, improve the identification and detection efficiency for RTP media stream, and provide a Simple way to identify RTP media streams.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for identifying RTP media streams in a network. Background technique [0002] The transmission of media streams in the network is mostly carried by RTP (Real-time Transport Protocol). The establishment of the media channel where the RTP stream is located is dynamically generated by the two parties through the relevant signaling protocol. In order to effectively implement the media stream information transmitted in the network For management and control, it is necessary to be able to effectively identify the media stream information transmitted in the network, that is, to identify the RTP media stream in the network. [0003] Since the RTP channel is established through mutual negotiation of various signaling protocols, the current conventional technical implementation scheme for identifying RTP media streams in the network is to detect all relevant signalin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
Inventor 刘利锋郑志彬刘廷永刘国清尹瀚涂卫华
Owner HUAWEI TECH CO LTD
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