一种适用于多跳Ad Hoc网络的增强型协作多址接入协议  

An Enhanced Cooperative MAC Protocol for Multi-hop Ad Hoc Networks

作　　者：张琰[1] 盛敏[1] 李建东[1] 田野[1] 姚俊良[1] 唐迪[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室信息科学研究所,陕西西安710071

出　　处：《电子学报》2011年第1期224-232,共9页Acta Electronica Sinica

基　　金：国家杰出青年科学基金(No.60725105);国家973重点基础研究发展计划(No.2009CB320404);长江学者和创新团队发展计划(No.IRT0852);国家863高技术研究发展计划(No.2007AA01Z217);科技重大专项资助(No.2010ZX03005-002;No.2010ZX03003-001);国家自然科学基金(No.60972048);国家重点实验室专项基金(No.ISN01080301);高等学校创新引智计划(No.B08038);教育部科学技术研究重点项目(No.107103)

摘　　要：针对多跳Ad Hoc网络提出一种增强型协作多址接入协议.该协议联合考虑数据传输速率和隐藏终端对协作网络性能的影响,通过优化协议的握手规则和协同节点的选择策略,从而在不引入开销的条件下,有效提高了网络的饱和吞吐量并降低了业务的接入时延.另外,基于对节点行为及其所处状态概率的分析,本文建立了协作多址协议在多跳Ad Hoc网络中的饱和吞吐量分析模型,并给出相应的理论分析结果.最后,通过在多跳Ad Hoc网络中的大量仿真,评估了所提增强型协作多址接入协议和分析模型的性能.仿真结果表明:相对于已有的协作多址协议该协议能够有效提高网络的饱和吞吐量.此外,仿真结果和理论分析结果能够很好的匹配,从而也证明了分析模型的正确性和有效性.An enhanced cooperative MAC protocol（ECoopMAC） is proposed for multi-hop Ad Hoc networks in this paper,which considers the transmission rate and the hidden node problem jointly.Through optimizing the order of handover and the strategy of helper selection,the saturated throughput and access delay are efficiently improved by ECoopMAC without introducing overhead and complexity.Furthermore,based on node＇s behavior and state probability,we propose an analytical model to evaluate the performance of cooperative MAC protocols in multi-hop Ad Hoc networks.Finally,the performances of the proposed analytical model and protocol are evaluated by extensive simulations in multi-hop wireless Ad Hoc networks.Simulation results show that our proposed protocol significantly improves the saturated throughput compared with CoopMAC.In addition,the results of analysis and simulation match well,which confirm that the proposed analytical model is correct and effective.

关 键 词：多跳AdHoc网络 协作通信 媒体接入控制 协作节点选择 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]