基于地理位置信息和功率控制的ad hoc网络并行MAC协议  

Parallel MAC protocol based on geographical location information and power control in ad hoc networks

作　　者：雷磊[1] 许宗泽[1] 

机构地区：[1]南京航空航天大学信息科学与技术学院,江苏南京210016

出　　处：《通信学报》2008年第9期81-90,共10页Journal on Communications

基　　金：国防预研基金资助项目(402040101)~~

摘　　要：对暴露终端并行传输产生的冲突干扰问题进行了研究,并在此基础上提出了一种基于地理位置信息和功率控制的ad hoc网络并行MAC协议。该协议利用地理位置信息判断节点的暴露终端身份,并在暴露终端发起的并行传输中引入了功率控制机制。在并行传输发送成功概率较低的情况下,该协议通过随机退避机制限制并行传输发起的次数,避免了失败的并行传输对其他接收节点产生干扰并导致节点产生不必要的能耗。仿真证明,该协议在显著提高ad hoc网络平均吞吐量的同时,还能有效节省节点的平均能耗,从而延长节点的工作时间和网络的生存时间。The conflict interference produced by the parallel transmission of the exposed nodes was investigated, and a parallel MAC protocol based on geographical location information and power control in ad hoc networks was proposed. This protocol identified the exposed nodes by their geographical location information and introduced the power control mechanism into the parallel transmission of the exposed nodes. When the probability of the successful parallel transmission was low, the protocol reduced the parallel transmissions by using the random backoff mechanism, thus avoided the interference caused by the failed parallel transmission and the energy consumption of the nodes. The simulation results show that, compared with the DCF protocol, this new protocol can improve the average throughput of the network significantly and save the average energy consumption of the nodes simultaneously, thus prolong the lifetime of the nodes and the network.

关 键 词：AD HOC网络 MAC协议 并行传输 暴露终端 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]