Multi-channel MAC protocol method based on cluster mechanism in vehicular Ad hoc network

A vehicle-mounted self-organizing, multi-channel technology, applied in network topology, wireless communication, electrical components, etc., can solve problems such as congestion, collision, and data loss, and achieve the effects of reducing the probability of collision, reducing the number of nodes, and avoiding channel conflicts
CN104994583AActive Publication Date: 2015-10-21CHONGQING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
CHONGQING UNIV OF POSTS & TELECOMM
Publication Date
2015-10-21

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Abstract

The invention requests to protect a multi-channel MAC protocol method based on a cluster mechanism. Firstly, each cluster head allocates time slots for cluster members according to position information of the cluster members, each cluster member reserves a channel in the own time slot, and the number of nodes accessed to the channels at the same time is reduced. Secondly, collisions are generated between neighbor nodes due to rapid movements of the nodes and then result in data loss, so, when the cluster heads allocate the channels for the cluster members, channel occupancy conditions of the neighbor nodes of the cluster members are considered. Finally, the cluster heads allocate the service channels for the cluster members and periodically broadcast a channel occupancy table, and the cluster members transmit data on the allocated channels. The provided multi-channel MAC protocol method based on the cluster mechanism obviously reduces the channel collision probability and improves reliability of data transmission.
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Description

technical field

[0001] The invention relates to the technology in the field of vehicle ad hoc networks, in particular to a multi-channel MAC protocol based on a cluster mechanism. Background technique

[0002] As an important part of intelligent transportation system, vehicular ad hoc network can support wireless communication between vehicles and between vehicles and roadside units, which plays an important role in improving the safety and efficiency of vehicular communication. Among them, the MAC protocol is the main technical difficulty of the vehicle self-organizing network, which is related to the quality of the network performance. With the increase of the number of vehicles, the scale of the vehicular ad hoc network becomes larger and larger, and the channel conflicts increase accordingly. The single-channel MAC protocol can no longer meet the performance requirements of the entire network. Compared with single channel, multi-channel communication can reduce the coll...

Claims

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