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Data relay transmission method in vehicle Ad hoc network

A self-organizing network and data relay technology, applied in access restrictions, electrical components, wireless communication, etc., can solve problems such as inability to apply vehicle self-organizing networks, inapplicable data transmission modes, and limited data transmission range, to avoid Effects of broadcast storm problem, low latency, and improved reliability

Inactive Publication Date: 2011-11-23
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the vast majority of data in the vehicle ad hoc network is required to be sent to each vehicle node, so the point-to-point data transmission mode is not applicable; under a certain transmission power, the data transmission range is limited, but through unlimited It is not feasible to increase the transmission power to achieve coverage of all vehicle nodes in the required area; the broadcast storm problem generated by the traditional flooding broadcast technology in the case of high node density will paralyze the entire network, resulting in a huge network Delay, cannot be applied in delay-sensitive vehicle ad hoc networks

Method used

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  • Data relay transmission method in vehicle Ad hoc network
  • Data relay transmission method in vehicle Ad hoc network
  • Data relay transmission method in vehicle Ad hoc network

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Embodiment Construction

[0024] The specific implementation of the data relay transmission method in the vehicle ad hoc network proposed by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] as attached figure 1 As shown, the vehicle ad hoc network consists of vehicle nodes, roadside nodes and control centers. The positioning module in the vehicle node uses a GPS receiver to obtain the location information of the vehicle through satellites; the vehicle driving information collection module collects various driving information of the vehicle in real time through various sensors installed on the vehicle, such as speed, direction, acceleration, etc. The location information and various driving information are collectively referred to as status information; the vehicle-road communication module is responsible for communication with the roadside nodes, and the roadside nodes report the driving conditions in the coverage area to the control cente...

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Abstract

The invention relates to a data relay transmission method applied to a vehicle Ad hoc system, which aims to provide the data relay transmission method having the advantages of low time delay and high reliability for the vehicle Ad hoc network. The method provided by the invention comprises the following steps: a vehicle node receiving the broadcasting data of a source node firstly computes the rebroadcasting probability according to the state information of the vehicle node and the state information of the source node and determines whether the vehicle node becomes a candidate relay node or not; and each candidate relay node computes the retreating time accessed to a channel according to the respective rebroadcasting probability, thereby completing that the candidate relay node in the retreating course finally becomes a relay node and realizing the relay rebroadcasting of the data. The method provided by the invention avoids the broadcasting storm problem because a large quantity of nodes receiving the data rebroadcast the data, reduces the time delay of the data transmission, avoids the problems that a single relay node rebroadcasts the data and the data transmission is stopped once the rebroadcasting fails, improves the reliability of the data transmission and provides the reliable data transmission with low time delay for the application in the vehicle Ad hoc system.

Description

technical field [0001] The invention relates to a data relay transmission method in a vehicle ad hoc network, the method is used for data relay transmission in the vehicle ad hoc network, and belongs to the field of mobile communication in the communication technology. Background technique [0002] With the vigorous development of the automobile industry, the global car ownership continues to grow. While bringing convenience to daily life, the ever-increasing number of cars has also brought challenges to road traffic. Urban traffic congestion, road traffic accidents, and road traffic safety in bad weather have become urgent problems to be solved. As an important component of the intelligent transportation system, the vehicle ad hoc network was proposed under this background, and it has become a key technology to ensure driving safety and improve traffic efficiency. Vehicle ad hoc network is an ad hoc network that applies wireless communication technology to inter-vehicle co...

Claims

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Application Information

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IPC IPC(8): H04W48/10H04W48/20H04W74/08
Inventor 沈连丰杨琼夏玮玮胡静宋铁成
Owner SOUTHEAST UNIV
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