基于自适应变速因子的水声通信网MAC退避算法  

Underwater acoustic communication networks MAC backoff algorithm based on adaptive speed factor

作　　者：张鹏程[1] 徐志京[1] 李进[1] 

机构地区：[1]上海海事大学信息工程学院,上海201306

出　　处：《计算机工程与设计》2014年第11期3757-3761,共5页Computer Engineering and Design

基　　金：上海海事大学基金项目(20120108)

摘　　要：为提高水声通信网络(UWSN)吞吐量并减少时延,从通信节点MAC层角度,提出一种基于自适应变速因子的水声通信网介质访问控制算法AVAB。通过更新变速因子,计算数据帧碰撞后增大竞争窗口的倍乘因子以及数据帧成功发送后减少竞争窗口的倍除因子,降低数据二次发送碰撞概率。OPNET仿真结果表明,AVAB算法能够降低网络的丢包率和延时,提高网络吞吐量。To improve the throughput and reduce the delay of the underwater acoustic communication network, from the view point of communication nodes in the MAC layer, a kind of UWSN back off algorithm AVAB based on the adaptive speed curve was put forward. The algorithm updated the competition window and multiplication factor after the transmission collision, and decreased the competition window and reduced the competition factor after successful transmission through three segments varia- ble rate curve, so that the data secondary transmission collision probability was reduced. OPNET simulation results show that the AVAB algorithm can reduce the network overall delay, while improving the throughput of the UWSN.

关 键 词：水声通信网 介质访问控制 退避机制 自适应变速算法 网络仿真 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]