低占空比、低碰撞的异步无线传感器网络MAC协议  

Low duty cycle and low collision asynchronous MAC protocol for wireless sensor network

作　　者：李哲涛[1,2,3] 朱更明[4] 王志强[4] 裴廷睿[1,3] 潘高峰[5] 

机构地区：[1]湘潭大学信息工程学院,湖南湘潭411105 [2]国防科学技术大学计算机学院,湖南长沙410073 [3]湘潭大学智能计算与信息处理教育部重点实验室,湖南湘潭411105 [4]湖南科技大学计算机科学与工程学院,湖南湘潭411201 [5]西南大学电子信息工程学院,重庆400715

出　　处：《通信学报》2013年第10期9-16,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(61379115;61110215;61311140261;61070180;61372049);湖南省自然科学基金委员会与湘潭市政府自然科学联合基金资助项目(12JJ9021);湖南省教育厅基金资助项目(11C1224);重庆市自然科学基金资助项目(cstc2013jcyjA40040);中央高校业务基金资助项目(XDJK2013C093);湖南省重点学科建设基金资助项目~~

摘　　要：提高信道监听质量是降低能量消耗和提高通信效率的有效方法。提出了一种低占空比、低碰撞的PB-MAC(predict-base MAC)协议。通过发送节点精确预测接收节点的唤醒时间,降低占空比;采用基于预测的重建连接机制和数据重传机制,有效地避免碰撞和实现高效重传。OMNet++仿真实验结果表明:在50节点随机网络中,PB-MAC的平均占空比、发送消息耗能和平均碰撞次数分别比RI-MAC少68.60%、24.75%、68.05%,比X-MAC少64.39%、64.05%、70.54%。同时,在网格网络中PB-MAC的性能也优于RI-MAC和X-MAC。Improving the quality of channel listening is an effective way to reduce energy consumption and improve communication efficiency. PB-MAC（predict-base MAC）, a novel low duty cycle and low collision asynchronous MAC protocol was presented. PB-MAC lowers sensor duty cycle by enabling senders to predict receiver wakeup times. An ef- ficient prediction-based reconnection and retransmission mechanism was introduced to achieve low collisions and high efficiency retransmission. Comparison of PB-MAC on OMNet＋＋ with RI-MAC and X-MAC was evaluated. Evaluated on scenarios with 50 random disposed nodes, the average duty cycle, consumed energy and average collisions for PB-MAC is 68.60%, 24.75% and 68.05% less than those of RI-MAC and 64.39%, 64.05% and 70.54% less than those of X-MAC respectively. In grid network, PB-MAC also outperforms RI-MAC and X-MAC protocols.

关 键 词：无线传感器网络 低占空比 伪随机 MAC协议 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]