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.
出处
《通信学报》
EI
CSCD
北大核心
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~~
