An Energy Efficient MAC Protocol for Wireless Passive Sensor Networks

Future Internet

and Tianqi Li¹  Qingyao Yu²  Kun Fu²  Guangming Li²  Xiaojie Hang² 

[1] China Mobile Group Shandong Company Limited Dongying Brunch, Dongying 257000, China;School of Mechanical, Electrical and Information Engineering, Shandong University, Weihai 264209, China;

关键词: Wireless Passive Sensor Networks (WPSNs);    Medium Access Control (MAC) protocol;    backoff algorithm;    contention window (CW);    energy efficiency;   

DOI  :  10.3390/fi9020014

来源: DOAJ

【 摘 要 】

Medium Access Control (MAC) protocol is one of the key network protocols that ensure Wireless Sensor Networks (WSNs) maintain high performance during communication. MAC protocol design plays an important role in improving the performances of the whole network. First, Wireless Passive Sensor Networks (WPSNs) and MAC protocols are introduced in this paper. Second, some existing MAC protocols are introduced. Sensor MAC (S-MAC) protocol is analyzed and existing improved backoff algorithms are introduced. A new MAC protocol called Improved Sensor MAC (IS-MAC) is then proposed to solve the problem that the contention window (CW) during carrier sense is fixed in S-MAC protocol. IS-MAC protocol is able to adjust CW in terms of network load, so energy consumption can be decreased. Finally, according to the simulation results on NS2, the proposed protocol has better performance in terms of throughput and energy consumption.

【 授权许可】

Unknown