Multi-channel multiple access method supporting video data transmission in wireless ad-hoc network

Abstract

The invention discloses a multi-channel multiple access method supporting video data transmission in a wireless ad-hoc network; a source node and a destination node perform channel competition on a common control channel according to the IEEE802.11b standard, after the successful channel competition, if the data to be sent by the source node are video data, the source node forms an identifier in an RTS (request to send) group; then the destination node knows that the data to be received are a video group according to the identifier after the RTS (request to send) group is received, and also forms an identifier in a replied CTS (clear to send) group in the same way; in this way, the adjacent node of the source node and the destination node can remain a section of channel resource after T time of the common control channel according to the received RTS (request to send) or the CTS (clear to send) group. According to the multi-channel multiple access method supporting video data transmission in the wireless ad-hoc network, enough bandwidth and delay guarantee can be provided for the video service.

Description

technical field [0001] The invention relates to the field of video and communication, and is a multi-channel multiple access protocol supporting real-time business data transmission such as video. Background technique [0002] With the development of video sharing sites such as Youku and Ku6, more and more people choose to watch videos as a way of acquiring knowledge or pastime. People's subjective demand for video is to have high clarity and fluency. In response to this demand, the video coding expert group of ITU-T (International Telecommunication Union Telecommunication Standardization Sector) and ISO / IEC (International Electrotechnical The Joint Video Group jointly formed by the Motion Picture Experts Group of the Commission proposed the H.264 / AVC (Advanced Video Coding) standard. Since this standard can support ultra-high-definition video codec, it is currently the most popular video codec technology, and its support for high-definition media is in line with contempora...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that the existing multiple access protocol in the wireless local area network cannot guarantee bandwidth and delay when transmitting video data, the present invention provides a new multi-channel multiple access method, which is based on IEEE802 .11b protocol, which can provide sufficient bandwidth and delay guarantee for video services

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