Distributed Multichannel and Mobility-Aware Cluster-Based MAC Protocol for Vehicular Ad Hoc Networks
Distributed Multichannel and Mobility-Aware Cluster-Based MAC Protocol for Vehicular Ad Hoc Networks
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DOI：
10.1109/tvt.2013.2258361
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发表时间：
2013-10-01
影响因子：
6.8
通讯作者：
Niu, Zhisheng
中科院分区：
文献类型：
--
作者：
Hafeez, Khalid Abdel;Zhao, Lian;Niu, Zhisheng
由于车辆安全应用需要定期传播状态和紧急消息，因此基于竞争的介质访问控制 (MAC) 协议（例如 IEEE 802.11p）在可预测性、公平性、低吞吐量、延迟和高冲突率方面存在问题，特别是在高密度网络中。因此，提出了一种分布式多通道和移动感知的基于簇的MAC（DMMAC）协议。通过通道调度和集成在模糊逻辑推理系统（FIS）中的自适应学习机制，车辆可以将自己组织成更稳定且不重叠的集群。每个集群将以分布式方式使用与其邻居不同的子通道，以消除隐藏终端问题。所提出的 MAC 协议的主要贡献是提高系统的可靠性、减少车辆安全应用的时间延迟以及以分布式方式在高度动态和密集的网络中有效地集群车辆。 DMMAC 的可靠性和连接性是根据平均簇大小、簇内和簇头 (CH) 之间的通信范围以及路径的生命周期来分析的。仿真结果表明，所提出的协议可以通过增加 CH 的生命周期和其成员的停留时间来支持交通安全并提高车载自组织网络 (VANET) 的效率、可靠性和集群拓扑的稳定性。
Since vehicular safety applications require periodic dissemination of status and emergency messages, contention-based medium-access-control (MAC) protocols such as IEEE 802.11p have problems in predictability, fairness, low throughput, latency, and high collision rate, particularly in high-density networks. Therefore, a distributed multichannel and mobility-aware cluster-based MAC (DMMAC) protocol is proposed. Through channel scheduling and an adaptive learning mechanism integrated within the fuzzy-logic inference system (FIS), vehicles organize themselves into more stable and nonoverlapped clusters. Each cluster will use a different subchannel from its neighbors in a distributed manner to eliminate the hidden terminal problem. Increasing the system's reliability, reducing the time delay for vehicular safety applications, and efficiently clustering vehicles in highly dynamic and dense networks in a distributed manner are the main contributions of the proposed MAC protocol. The reliability and connectivity of DMMAC are analyzed in terms of the average cluster size, the communication range within the cluster and between cluster heads (CHs), and the lifetime of a path. Simulation results show that the proposed protocol can support traffic safety and increase vehicular ad hoc networks' (VANETs) efficiency, reliability, and stability of the cluster topology by increasing the CH's lifetime and the dwell time of its members.