Ad Hoc网络载波监听双信道接入协议  

Carrier sensing based dual channel access protocol for Ad Hoc network

作　　者：赵志峰[1] 郑少仁[2] 仇佩亮[1] 

机构地区：[1]浙江大学信息科学与工程学院,浙江杭州310027 [2]解放军理工大学通信工程学院,江苏南京210007

出　　处：《浙江大学学报（工学版）》2005年第4期478-482,共5页Journal of Zhejiang University：Engineering Science

摘　　要：为了解决由隐终端和暴露终端引起的数据报文冲突问题,在对Ad Hoc网络双信道接入协议进行研究的基础上,提出了载波监听双信道接入协议(dual channel multiple access,DCMA),包括基本的载波监听协议(basic carrier sens ing,BCS)和忙指示载波监听协议(carrier sensing busy indication,CSBI).研究了DCMA控制报文的长度以及其解决隐终端和暴露终端的能力.通过仿真对DCMA的性能进行了分析和比较.结果表明,CSBI通过载波监听和忙指示(busy in dication,BI)报文完全解决了隐终端和暴露终端问题,在高负荷时其吞吐量比802.11 DCF提高了近50%.To resolve the problem of data packet collision in Ad Hoc network caused by hidden terminal and exposed terminal, dual channel based multiple access (DCMA) protocols were proposed, which including basic carrier sensing (BCS) protocol and carrier sensing with busy indication (CSBI) protocol. The length of the control packets and the capability of solving hidden and exposed terminal were studied. Simulation results showed that CSBI completely solves the problem of hidden and exposed terminal through carrier sensing and busy indication (BI) control packet. The throughput of CSBI was almost 50% improved over that of 802.11 DCF under heavy network load.

关 键 词：AD HOC网络 信道接入协议 双信道 载波监听 

分 类 号：TN925.93[电子电信—通信与信息系统] TP391.9[电子电信—信息与通信工程]