A Schedule-Based Energy-Efficient Multipolling MAC Protocol for Wireless LANs

• Main Authors: Yen-Chang Chen, 陳彥璋
• Other Authors: 陳健輝
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/48095811620194241019

碩士 === 國立臺灣大學 === 資訊工程學研究所 === 100 === In recent years, IEEE 802.11 wireless local area networks (WLANs) have been widely deployed, and more and more mobile devices have built-in WLAN interfaces. However, the mobile devices are powered by batteries with limited energy. Thus, the good design of energy efficiency becomes one of the most important issues in WLANs. Based on IEEE 802.11 infrastructure WLANs, we propose a schedule-Based energy-efficient media access control (MAC) protocol which employs multipolling mechanism to combine power management strategy with low overhead. The main idea is to derive exact schedules of data transmissions and put wireless stations into the doze state whenever they are inactive. From the simulation results, we demonstrate that our proposed protocol presents a better performance than IEEE 802.11 power saving mode and other protocols in energy efficiency with unapparent losses of average uplink delay and saturated throughput as tradeoffs. The significant saving of energy is a consequence of alleviating the overhearing and collision problems with well scheduled wake-up times for STAs.