A Study on Energy Efficiency of MAC Layer in Wireless Sensor Networks

• Main Authors: Li-Ming Wang, 王立銘
• Other Authors: Yung-Fa Huang
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/33829539236679018543

碩士 === 朝陽科技大學 === 資訊與通訊系碩士班 === 100 === Wireless sensor network (WSN) is a power aware wireless networks due to the used energy-limited battery in sensor nodes. Therefore, in this thesis, the energy efficiency of MAC layer is investigated. Thus a low-delay energy efficiency scheduling (LDEES) scheme is proposed to improve the energy efficiency for the WSN. In this thesis, a ten-point WSN is proposed to investigate the network delay and energy consumptions. Both schemes of with adaptive listening (WAL) and without adaptive listening (WOAL) are proposed to compare the performance of network delay and energy consumptions in WSN. Simulation results show that the network delay is increased with the increasing of duty cycle of nodes. Moreover, the energy consumption is increased with the duty cycle. Furthermore, the WAL scheme can add a hop in one cycle than WOAL scheme without increasing more energy consumptions. Therefore, according to the number of nodes in network, ie. the number of transmission hops in the transmission route, we adjust the duty cycle of nodes to meet the minimum delay and minimize the energy consumption as well.