一种ad hoc网络时分多址接入策略  

Time division multiple access scheme for ad hoc network

作　　者：赵民建[1] 徐明霞[1] 陈杰[1] 李式巨[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第10期1710-1714,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家"863"高技术研究发展计划资助项目(2006AA01Z273)

摘　　要：为了提高ad hoc网络的吞吐量,提出了一种利用多用户分集的时分多址接入(TDMA)策略.在系统分析的基础上给出了一种分布式协议实现.为了根据即时的信道特性来决定接入信道的链路,将时隙分成控制和数据两个阶段.在控制阶段,通过控制包的交互实现发送节点对链路信息的获取以及解决竞争邻域内链路接入冲突;在数据阶段,由接入成功的链路发送数据包.仿真结果表明,该策略可以有效地利用多用户分集,比原有的随机接入策略有很大的性能提升,提高了网络的吞吐量.A time division multiple access （TDMA） scheme using multi-user diversity was proposed to improve the throughput of ad hoc network. A distributed protocol was implemented based on the network analysis. A slot was divided into control stage and data stage for determining the accessible link according to the current channel characteristic. Nodes gathered the link information and solved link access collisions in the neighborhood by exchanging control packets in the control stage. And the successfully accessed nodes transmitted data packets in the data stage. Simulation results showed that the proposed scheme can effi- ciently use the multi-user diversity, gain a great performance promotion comparing to the random scheme and improve the network throughput.

关 键 词：AD HOC网络 时分多址接人 多用户分集 

分 类 号：TN925.93[电子电信—通信与信息系统]