采用定向天线Ad Hoc网络MAC协议关键问题研究

摘要

The problems of using directional antenna in Ad Hoc networks are introduced. The causation of hidden terminal and exposed terminal, and some suggestions for such problems are discussed. In addition, a new modified CSMA protocol is presented. Result shows that modified CSMA protocol in Ad Hoc network with directional antenna can improve the system performance.%介绍基于定向天线的MAC协议,阐述使用定向天线所面临的隐藏终端、暴露终端以及聋节点问题.重点分析定向天线的MAC协议造成隐藏终端和暴露终端的原因以及解决这些问题的相应策略,在此基础上提出了新的改进CSMA协议.通过仿真表明,改进CSMA协议能提高基于定向天线Ad Hoc网络的整体性能.