MANET中支持QoS的自适应MAC协议退避机制  

Adaptive QoS-Supported Backoff Mechanism for MAC Protocol in MANET

作　　者：葛志辉[1,2] 陈志刚[2] 李陶深[1,2] 赵明[2] 

机构地区：[1]广西大学计算机与电子信息学院,南宁530004 [2]中南大学信息科学与工程学院,长沙410083

出　　处：《系统仿真学报》2009年第3期676-679,683,共5页Journal of System Simulation

基　　金：国家自然科学基金(60573127);广西高校人才小高地建设创新团队资助计划(桂教人[2007]71号);广西自然科学基金项目(桂自科0640026);广西大学科研基金资助项目(X081814)

摘　　要：已有的支持QoS的MAC层协议虽然在一定程度上可以提供区分服务的功能,但多是以牺牲尽力而为业务的性能为代价的。提出了一种支持QoS的自适应MAC协议的退避机制,节点可以根据感知到的负载状况自适应调整退避算法,在保障实时业务QoS要求的同时尽可能地提高信道利用率。仿真结果表明,在不同网络负载的场景下,本文算法相对于IEEE 802.11e在QoS保障以及信道利用率方面都有较好的表现。Although the existing QoS-supported MAC Protocols can provide QoS guarantee at some degree, most of them sacrifice the performance of best-effort traffic. An Adaptive QoS-supported Backoff Mechanism for MAC Protocol was proposed, in which nodes could adjust their backoff algorithm according to the network load state they measured. So the proposed adaptive backoff algorithm could improve the link utility while at the same time meeting the QoS demand of real-time traffic. In simulation study, the algorithm shows better performance improvement over IEEE 802.11e in QoS guarantee and link utility under various scenarios.

关 键 词：自组网 服务质量 802.11e 退避 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]