Improving the Channel Efficiency by Adaptive Power Control in Mobile Ad Hoc Networks

• Main Authors: Sui-Yi Chen, 陳隨益
• Other Authors: Ting-Chao Hou
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/22491129318899835392

碩士 === 國立中正大學 === 電機工程研究所 === 91 === The IEEE 802.11 wireless LAN standard specifies several MAC protocols which typically assume fixed transmission power at each station and have not considered power control mechanisms based on the distance between the transmitter and receiver in order to improve the spatial channel reuse. This thesis proposes a power control method which modifies the IEEE 802.11 MAC protocol to improve the wireless channel efficiency. The power control method named PCMAC allows the sender to reduce the transmission power when the receiver is nearby the sender, so that the interference to other nodes is minimized. The method is based on the ”four-way handshaking”mechanism of the IEEE 802.11 MAC protocol. By conditionally reducing the transmission power strength of the DATA frame, PCMAC can effectively increase the spatial reuse of channels and reduce the energy consumption of the sender. We present our simulation results to show that the PCMAC mechanism can effectively improve the performance of the IEEE 802.11 wireless LANs.