一种基于MAC层丢包率的自适应算法  

Adaptive Algorithm Based on Loss Rate of MAC Layer

作　　者：张洪[1] 卢宇[2] 吴懿[1] 吴明发[1] 

机构地区：[1]成都大学医护学院,四川成都610032 [2]中国科学院光电技术研究所,四川成都610209

出　　处：《成都大学学报（自然科学版）》2009年第2期126-128,共3页Journal of Chengdu University（Natural Science Edition）

基　　金：成都大学校科技基金资助项目(2008xjzk22)

摘　　要：在移动Ad Hoc网络中,随着网络节点移动速度加快,MAC层拥塞程度加剧,势必严重影响网络数据传输成功率和加大传输延时.通过对HELLO消息、TC消息的修改来获取并传输MAC层的拥塞信息,同时通过仿真实验设定阀值,对OLSR路由协议做自适应发包强度改进.仿真实验表明,改进后的方案在节点丢包比较严重时,能够显著提高数据传输成功率,增加网络承受负载能力,提高OLSR的路由传输能力.The high-speed nodes aggravate congestion of MAC in Ad Hoc which influences the success rate and increases the time-lag of data transmission. HELLO and TC （topology control） messages were modified to obtain and transmit congestion information of the MAC layer and a simulation experiment was taken to set the threshold value. Besides OLSR Routing Protocols＇ intensity of packet algorithm was improved. The research results show that when the improved solution loses many packet at the nodes, success rate of data transmittal can be evidently enhanced. Both load capacity of the internet and route transmittal ability of OLSR are improved.

关 键 词：OLSR HELLO TC MPRs 重定义 

分 类 号：TP393.06[自动化与计算机技术—计算机应用技术]