基于网络编码的TDMA移动自组网MAC协议设计

Design MAC Protocol for TDMA Mobile Ad Hoc NetworkBased on Network Coding

移动自组织网络被广泛地应用于地震救援、火灾救援、林区通信和安保通信等多个领域,如何提升移动自组织网络的吞吐量一直以来都是学术界的研究热点。网络编码技术由于在多播场景下可以取得由最大流最小割定理决定的网络容量上界,成为学术广泛研究的对象。针对多播业务的资源调度问题,对网络编码的技术现状进行了简要介绍;基于COPE机会网络编码的思想,提出了一种基于网络编码的TDMA移动自组网MAC协议,采用OPNET,分别在低业务负载、中等负载和高负载的情况下,对所提算法进行了仿真,仿真结果显示在TDMA网络中引入网络编码,能够提升网络吞吐量。

Mobile ad hoc networks are widely used in many fields such as earthquake rescue,fire rescue,forestry communications and security communications.How to improve the throughput of mobile ad hoc networks has always been a research hotspot.Network coding technology has become the subject of extensive academic research because it can obtain the upper bound of the capacity determined by the Max-Flow Min-Cut theorem in a multicast scenario.Aiming at the resource scheduling problem of multicast services,a brief introduction is given to the current status of network coding technology.Based on the idea of COPE opportunistic network coding,a TDMA mobile ad hoc network MAC protocol based on network coding is proposed.In the case of service load,medium load and high load,the proposed algorithm is simulated.Simulation results show that the introduction of network coding in TDMA network can improve network throughput.