无线传感器网络中一种优化的隐式跨层传输控制算法  

An optimized implicit cross-layer transmission control algorithm in WSNs

作　　者：龙昭华[1] 李吴[1] 蒋贵全[1] 

机构地区：[1]重庆邮电大学计算机科学与技术学院,重庆400065

出　　处：《传感器与微系统》2013年第7期116-119,共4页Transducer and Microsystem Technologies

基　　金：国家重大科技专项资助项目[2009ZX03004-003-04]

摘　　要：为了提高无线传感器网络的传输质量,对Ad Hoc网络中一种隐式逐跳的跨层拥塞控制协议做了改进。通过路由层、MAC层与传输层合作,使得隐式逐跳的传输控制协议在无线传感器网络中能够适用。路由层采用静态路由协议,设置2个目的接收节点来防止洪泛产生。在传输层通过引入相对信息熵理论实现隐式确认,以提高数据传输的可靠性。在MAC层根据节点距拥塞区域的跳数来决定信道竟用的退避时间。跨层设计有效地解决了无线传感器网络中的传输控制问题。通过Matlab仿真证明:与现有的传输层协议相比,改进的方法能降低网络的负载,增加网络的吞吐量,减少网络的延迟和丢包率。In order to improve transmission quality of WSNs, improvements are made on implicit hop-by-hop congestion control protocol in Ad Hoc networks. The protocol can be suitable for WSNs by cooperation of routing layer, MAC layer, and transmission layer. In routing layer, static routing protocol is used, thus flooding can be avoided by setting two destination receiving nodes. Relative information entropy theory is introduced into the transmission layer to achieve implicit confirmation, to increases reliability of data transmission. In the MAC layer, the back-off time which used in the channel competition is determined depend on the distance between the node and the congestion zone. Cross-layer design solves the problem of transmission control in WSNs effectively. Matlah simulation proves that compared with current transmission layer protocols, the improved protocol can increase throughput of the network, reduce the network load, delay and packets loss rate.

关 键 词：无线传感器网络 跨层 相对信息熵 拥塞控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]