Method for formulating multi-priority MAC protocol based on clustering in vehicular ad hoc network

An in-vehicle self-organizing, multi-priority technology, applied in network topology, network traffic/resource management, access restrictions, etc., can solve the problems of increasing computational complexity, network delay, and being unsuitable for in-vehicle self-organizing networks. Increased throughput, enhanced stability, control channel and service channel equalization effects

Active Publication Date: 2022-03-25
SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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Problems solved by technology

VER-MAC allows nodes to broadcast security information once in the control period and data period, which improves the reliability of security information, but when transmitting security information, the higher computational complexity will increase the network delay
In summary, none of these protocols are suitable for the special environment of VANETs

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  • Method for formulating multi-priority MAC protocol based on clustering in vehicular ad hoc network
  • Method for formulating multi-priority MAC protocol based on clustering in vehicular ad hoc network
  • Method for formulating multi-priority MAC protocol based on clustering in vehicular ad hoc network

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Embodiment 1

[0167] The present invention will be further described below with reference to the accompanying drawings.

[0168] Due to the frequent and dynamic changes in the topology of the vehicle ad hoc network and the high-speed movement of the vehicle, in order to ensure that the safety information can access the channel with the minimum delay and within a tolerable range, it is suitable for different traffic flows and meets the needs of safety and user applications. In accident early warning and congested roads, the time asynchronous and multi-priority access channel mechanism ensures timely and reliable transmission of safety messages, improves channel utilization, and reduces the occurrence of traffic accidents; provides passengers with some value-added services during the journey By dividing the nodes into clusters, the cluster head represents the members in the cluster to compete for the channel to reserve the service channel, and fewer concurrent nodes access the channel at the s...

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Abstract

The invention relates to a method for formulating a multi-priority MAC protocol based on clustering in a vehicle-mounted ad hoc network. The protocol adopts a cluster head election algorithm based on mobile perception and a multi-priority access channel mechanism, and on the premise of ensuring priority access to security information, reducing The number of nodes that access the channel concurrently increases the channel throughput and prolongs the life of the cluster head. At the same time, a method of reserving the service channel without competition is proposed, so that the cluster head reserves the channel for the active nodes in the cluster, avoiding channel conflict and reducing the probability of collision. Through the above technologies, in the vehicular ad hoc network with frequent changes in the network topology, the average delay of safety information is reduced, the throughput of the service channel is increased, and it has better adaptability to different traffic conditions.

Description

technical field [0001] The invention relates to a multi-priority MAC protocol based on clustering applied in traffic, and belongs to the technical field of vehicle self-organizing networks. Background technique [0002] Vehicle Ad-hoc Network (Vehicular Ad-hoc NETwork, VANET) is an important application of traditional mobile ad hoc network in the field of transportation, which is realized by On-Board Unit (OBU) and Road Side Unit (RSU) Two-way communication between vehicles and vehicles and between vehicles and roads. Based on the IEEE 802.11p standard, the IEEE 1609 working group in the United States formulated the IEEE 1609.4 standard according to the special needs of VANET. The standard divides the dedicated bandwidth of 75MHz into one control channel (Control CHannel, CCH) and six service channels (Service CHannel, SCH), and specifies that the synchronization period of channel access is 100ms. Since the fixed synchronization period division is not suitable for the high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/02H04W28/26H04W48/10H04W74/00H04W74/08H04W84/18
Inventor 任秀丽陈梓航郭炜儒
Owner SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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