摘要
无线传感器网络是一项新兴的无线网络技术,而媒体访问控制(MAC)协议是无线传感器网络协议的重要组成部分,它的性能好坏直接关系到无线信道的利用效率和整个网络的性能。介绍了典型的CSMA协议的工作原理,并在P-坚持CSMA协议基础上提出了改进方法。用NS2仿真工具对改进后的协议进行了性能测试,仿真结果表明,改进后的协议在节点数不太多的情况下性能明显得到提高。
Medium access control（MAC）protocol is an important part in wireless sensor networks（WSNs）.The performance of the whole network and the efficiency of the wireless channels utilization mostly lie on the performance of MAC protoco1.The working principle of CSMA protocol is introduced, and an improved method is put forward on the basis of P-persistant CSMA protocol. Simulation and analysis indicate that, the performance of improved protocol is markedly optimized in the network with not so many nodes.
出处
《通信技术》
2008年第2期114-116,共3页
Communications Technology
