一种新Ad hoc网络退避算法  

A new back-off algorithm in Ad hoc networks

作　　者：魏凯[1] 姜弢[1] 栾晓明[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2008年第6期11-13,17,共4页Applied Science and Technology

基　　金：黑龙江省自然科学基金资助项目(AF200611)

摘　　要：分析了Ad hoc网络中广泛使用的IEEE802.11DCF的基本原理,指出了IEEE802.11协议中使用的BEB退避算法的不足,并介绍了其他2种退避算法MILD和FCR.在这3种算法的基础上提出了一种新的退避算法,通过节点不同状态下窗口函数的改进和快速接入机制来提高协议的性能.仿真结果表明,该算法能带来整体性能的提升.The basic principle of IEEE802.11DCF, a protocol widely used in Ad hoc network, is introduced. The disadvantage of back-off algorithm is presented. The other two back-off algorithms, MILD and FCR, are also introduced. On the basis of these three algorithms, a new back-off algorithm is proposed for enhancing the performance of the protocol by fast access mechanism and improving the window function under different states. Simulation resuits show the improved performance.

关 键 词：AD HOC网络 IEEE802.11 MAC协议 退避算法 竞争窗口 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]