改进DBTMA协议公平性的一种方案  

A Scheme for Fairness Modification of the DBTMA Protocol

作　　者：刘娟[1] 康桂华[1] 张理华[1] 

机构地区：[1]河海大学计算机及信息工程学院,江苏常州213022

出　　处：《河海大学常州分校学报》2007年第2期9-12,共4页Journal of Hohai University Changzhou

摘　　要：针对双忙音多址接入协议(DBTMA)在解决Ad Hoc网络中的隐终端和暴露终端问题时,出现的不公平性问题,提出了一种改进方案.改进方案去掉原协议中的忙音信号发送,采用时隙ALOHA协议对缺少发送忙音保护的RTS报文进行传输.仿真实验表明,改进的DBTMA既降低了协议的复杂性,缩短了时延,又保证了协议的公平性和稳定的信道利用率.In Ad Hoc networks, the operation of Dual Busy Tone Multiple Access（DBTMA） solves the hidden and the exposed-terminal problems, but it causes the fairness problem at which some modification has been proposed aimed. In improved DBTMA, the transmit busy tone is got rid of and the RTS packet is transmitted in slotted ALOHA scheme, which improves the probability of successful RTS reception. The result of simulation shows that improved DBTMA scheme decreases the complexity of the protocol, reduces the transmission delav, and guarantees the fairness of svstem and the steadv performance.

关 键 词：双忙音多址接入协议 ADHOC网络 忙音 隐终端 暴露终端 

分 类 号：TN929[电子电信—通信与信息系统]