车载自组网MAC层相关技术的研究

Research on Related Technologies of MAC Layer in Vehicular Ad Hoc Networks

摘要: 随着车载自组网的发展，如何优化底层通信是车载自组网中研究的热点。为提高网络容量及信道利用率，本文提出了一种基于混合分配的VANET信道优化策略。在网络拥塞控制方面，针对车载自组网的特殊性，本文提出了一种基于缓冲区优化的拥塞预防策略，对缓冲区内的消息包进行一定的丢包，尽可能地降低网络拥塞发生的可能性。最后，通过仿真实验对提出的策略进行验证。仿真结果表明：该策略合理分配了信道，显著提高了网络的吞吐量。

Abstract: With the development of VANET, how to optimize the underlying communication becomes a re-search hot. A VANET channel optimization strategy based on hybrid channel allocation is probed. In the network congestion control, aiming at the particularity of VANET, a congestion prevention strategy based on buffer optimization is discussed. Some data packets are thrown away in buffer to relieve the pressure of buffer and reduce the possibility of network congestion. The proposed strategy is verified by simulation experiment. The experiment results indicate that channels are allocated reasonably and the network throughput is improved significantly.