基于同步调度的低占空比无线传感器网络MAC协议
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摘要
SCP-MAC协议相邻节点间的同步唤醒,如果通信负荷增加,会产生较高的无意侦听,会降低能效和吞吐量,造成拥塞。提出了一种基于同步调度的超低占空比MAC协议ESCP-MAC,优化了唤醒调度方式,减少相邻节点的竞争,采用低功耗侦听的方式同步。仿真和实验结果表明:提出的协议在继承SCPMAC协议低能耗优势的基础上,改善了多跳传输的端到端延时性能,减少了丢包率。
In SCP-MAC protocol,synchronous awakening between adjacent nodes,with the increase of communication load,will cause unintentional listening and decline of energy efficiency and handling capacity,which can lead to network congestion. A low-duty-ratio MAC protocol is proposed. It optimizes the awakening scheduling mode,reduces the competition of adjacent nodes and synchronizes with low-power consumption listening. The simulation results shows that ESCP-MAC protocol retains the advantage of low energy consumption,improves characteristics of end-to-end delay and reduces rate of packet loss.
In SCP-MAC protocol,synchronous awakening between adjacent nodes,with the increase of communication load,will cause unintentional listening and decline of energy efficiency and handling capacity,which can lead to network congestion. A low-duty-ratio MAC protocol is proposed. It optimizes the awakening scheduling mode,reduces the competition of adjacent nodes and synchronizes with low-power consumption listening. The simulation results shows that ESCP-MAC protocol retains the advantage of low energy consumption,improves characteristics of end-to-end delay and reduces rate of packet loss.
引文
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[3] Ye W,Silva F,Heidemann J. Ultra-low duty cycle MAC with scheduled channel polling[C]∥Proc of ACM Sensys,2006.
[4] El-Hoiydi A. Aloha with preamble sampling for sporadic traffic in Ad Hoc wireless sensor networks[C]∥Proceedings of the IEEE International Conference on Communications2002:3418-3423.
[5] Hill J,Culler D. Mica:A wireless platform for deeply embedded networks[J]. IEEE Micro,2002,22(6):12-24.
[6] Ye W,Heidemann J,Estrin D. Medium access control with coordinated adaptive sleeping for wireless sensor networks[J]. IEEE/ACM Transactions on Networking,2004,12(3):493-506.
[7] Van Dam T,Langendoen K. An adaptive energy-efficient MAC protocol for wireless sensor networks[C]∥Proceedings of the First International Conference on Embedded Networked Sensor Systems,2003.
[8] Sun Y,Gurewitz O,Du S,et al. ADB:An efficient multihop broadcast protocol based on asynchronous duty-cycling in wireless sensor networks[C]∥Proc of ACM Sensys,2009.
[9] Ye W,Heidemann J,Estrin D. An energy-efficient MAC protocol for wireless sensor networks[C]∥Proceedings of the Twenty-First Annual Joint Conference of the IEEE Computer and Communications Societies,2002:1567-1576.