Message type identifying method and device, message header compressing method and system

A message type and identification device technology, which is applied in the field of data communication, can solve problems such as UDP message misidentification, system occupation, and reduced system processing efficiency, so as to improve efficiency and avoid waste

Inactive Publication Date: 2007-06-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In the heuristic method, according to the parity characteristic of the port number carried in the UDP header, and whether the value of the payload field encapsulated behind the UDP header is the same as the fixed value required by the RTP protocol message, for example, the value of the RTP protocol version number is fixed at 2, To determine whether the input message is an RTP message based on UDP application, but the port number of a pure UDP message may also be an even number, and the payload field value encapsulated in the pure UDP message header is consistent with the RTP protocol The value of the required fixed value will also be the same, then using the existing heuristic method to judge will mistake the pure UDP message as an RTP message based on UDP application
Performing RTP compression on pure UDP packets will reduce the efficiency of system processing packets and occupy other compression resources of the system

Method used

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  • Message type identifying method and device, message header compressing method and system
  • Message type identifying method and device, message header compressing method and system
  • Message type identifying method and device, message header compressing method and system

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Embodiment Construction

[0046] The embodiment of the present invention provides a message type identification method, as shown in Figure 3, the method includes:

[0047] Step 301: Receive the message, and obtain the saved UDP port number of the real-time transport protocol RTP based on the user datagram protocol UDP application;

[0048] Step 302: Obtain the UDP port number carried in the UDP header of the input message;

[0049] Step 303: Match the UDP port number of the RTP application based on UDP with the UDP port number carried in the UDP header of the input message, and if they match, identify the input message as an RTP application based on UDP message, if they do not match, then identify the message as a pure UDP message or other protocol messages based on UDP applications.

[0050] Wherein, the port number matching in the embodiment of the present invention means that the UDP port number carried by the UDP header of the input message is exactly the same as the UDP port number of the saved R...

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Abstract

The invention discloses a message type identification method, which core idea is to match the preserved UDP port number of RTP based on the application with the port number carried in the UDP herder of the input text, if they match, then the input text is identified to be RTP packet based on the application of UDP, if not match, then it is identified to be the pure UDP packet or other agreement packets based on UDP application. The invention also discloses packet type identification device corresponding to the method. The invention discloses a method and system to compress the header of packet based on the above packet type identification method.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a message type identification method and device, and a message header compression method and system in the technical field of data communication. Background technique [0002] Now that the Real-time Transport Protocol (RTP) has become a formal Request for Comments (RFC) publication, there is growing interest in using RTP to enable interoperability between different networked audio and video applications. However, it is worth noting that when using a low-speed link such as 14.4Kb / s or 28.8Kb / s dial-up, the 12-byte RTP message header occupies too many bytes for a load of only 20 bytes. In order to reduce the bytes occupied by the packet header, compression technology is used to make the IP / UDP / RTP packet header smaller. At this time, the compression can be aimed at only the RTP message header or the combined header of the Internet Protocol (IP), User Datagram Protocol (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
Inventor 孙默
Owner HUAWEI TECH CO LTD
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