Video transmission method for vehicle ad hoc network based on overlay structure

Abstract

The invention discloses a vehicular ad hoc network video transmission method based on an overlay structure. The method mainly solves the problem that in the prior art, a node with needs for video cannot find a proper video source node is solved. The method comprises the implementation steps that (1) a cluster structure based on content awareness is built according to the position of the node, video stored in the node and the needs of the node for the video; (2) a distribution list of the video in a cluster is built at a cluster head, and is used for constructing the overlay structure; (3) the node in the cluster searches for the optimal source node according to the overlay structure, and request information is sent to the optimal source node; (4) the cluster head sends video request information to an RSU firstly, the RSU returns video information to the cluster head, and the communication between the cluster head and the RSU is achieved. According to the method, the node with the needs can find the optical video source, transmission delay is reduced, video playing quality is improved, and the method can be used for video transmission in a vehicular ad hoc network.

Description

Technical field: [0001] The invention belongs to the technical field of communication, and mainly relates to a video transmission mechanism in a vehicle ad hoc network VANET, which can be used to improve the quality of video playback on the VANET network. Background technique: [0002] Vehicle ad hoc network VANET is a service-oriented and user-oriented ad hoc network. It can provide users with various services through communication between vehicles and between vehicles and roadside equipment. It is mainly divided into the following three types: security services, convenience services and entertainment services. In the above three applications, the transmission of video images plays an important role. For safety applications, the transmission of video or pictures can help to better understand the specific details of the accident; for convenience applications, a simple picture or video can fully explain the current road condition information, which is more accurate and clear...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the optimal video source node cannot be determined in the above-mentioned prior art, and propose a vehicle self-organizing network video transmission method based on overlay structure, so as to reduce the time delay for nodes to obtain complete video information and improve the delivery rate and video playback quality

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