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Frequency coordination and allocation method for multichannel multi-hop vehicular ad hoc network

Inactive Publication Date: 2016-05-04
SHANGHAI TELESCENIC INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing problems, the present invention aims to provide a multi-channel multi-hop vehicle ad hoc network frequency coordination allocation method

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  • Frequency coordination and allocation method for multichannel multi-hop vehicular ad hoc network

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Embodiment Construction

[0028] The specific implementation method of the present invention will be further described below in conjunction with the examples. This embodiment is used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0029] see Figure 1 to Figure 6 , the present invention mainly aims at the problem of frequent channel switching caused by unstable channel characteristics caused by changing link environment in multi-channel VANET, and proposes a method for finding long-term stable links, which can not only apply multi-channel technology Improve the network data transmission rate, and can reduce the number of channel switching, thereby reducing the time delay and communication interruption caused by channel switching. In addition, the present invention also utilizes the queuing time delay of the channel to effectively control the network congestion caused by the unbalanced channel load.

[0030] ...

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Abstract

The invention provides a frequency coordination and allocation method for a multichannel multi-hop vehicular ad hoc network. The method comprises the steps that: any node broadcasts a channel detection frame to a neighbor node; when a source node is about to send data to a target node, the source node adds a source routing detection frame in the channel detection frame, and then selects two channels with the optimal channel quality to the neighbor node; whether a next hop stabilization condition is satisfied is judged; the source node receiving a source routing detection frame replay selects the optimal next hop and the secondary optimal next hop according to the movement speed and the position of the next hop contained in the source routing detection frame replay; an optimal link is selected to send a data packet; and the node receiving a data frame arrives the optimal communication link of the next hope and sends the data of the source node to a target node after multiple hops. By adopting the frequency coordination and allocation method provided by the invention, the node can fully master the channel quality of several channels thereof and find the channel with the optimal state, so that the hops of the multi-hop vehicular ad hoc network are decreased, and the communication quality and the communication efficiency are improved.

Description

technical field [0001] The invention belongs to the multi-channel technology in a multi-hop ad hoc network, specifically a multi-channel multi-hop vehicular ad hoc network frequency coordination allocation method, which is applied to the field of vehicular ad hoc network. Background technique [0002] Intelligent transportation system (Intelligent Transportation System, ITS) has been a research hotspot for many years. In various technical fields of intelligent transportation system, it aims to improve vehicle driving safety, transportation efficiency and provide ubiquitous wireless Internet access. Network technology (Vehicular Ad-hocNetwork, referred to as VANET) is the top priority of the research. VANET is an ad hoc network dedicated to automotive communications. The Federal Communications Commission uses the 75MHz frequency band of 5.850~5.925GHz exclusively for intelligent transportation systems. Through dedicated short-range communication (DSRC), the 75MHz is dedicate...

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Application Information

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IPC IPC(8): H04W40/12H04W40/20H04L12/727H04L45/121
CPCH04L45/121H04W40/12H04W40/20
Inventor 钱智文
Owner SHANGHAI TELESCENIC INFORMATION TECH CO LTD