A Utilization Based Energy Efficient MAC Protocol for Sensor Networks
Date Issued
2005
Date
2005
Author(s)
Yang, Shih-Hsien
DOI
en-US
Abstract
In this work, we propose U-MAC, a medium access control protocol designed for wireless sensor networks. Nowadays, wireless sensor network are formed by a great quantity of sensor nodes, which are generally battery-powered and may
not recharge easily. Consequently, how to prolong the lifetime of the nodes is an important issue while designing a MAC protocol. Ye et al. proposed S(Sensor)-
MAC that uses a periodically listen and sleep schedule scheme in order to lower the energy consumption of sensor nodes. By evaluating the analytical model of S-MAC
in Section 3, we can know that lowering the energy consumption may result in higher latency. Addressing on such tradeoff, U-MAC balances the tradeoff by varying duty
cycle, utilization based tuning of duty cycle and selective sleeping after transmission. We choose ns-2 as our network simulator to evaluate the effectiveness of U-MAC, and we compare U-MAC with S-MAC and DSMAC in a chain and a cross topology. The experiment results show that our proposed schemes save energy about 43% and reduce latency by 65% from S-MAC.
Subjects
感測器網路
連結層協定
省電設計
sensor networks
MAC protocol
energy-efficiency
Type
thesis
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