Designing Power efficient system for Ad-Hoc network using TC-PSM
Turning the devices to low-power states when they are not in use is an important technique to conserve energy for battery-powered wireless devices. The IEEE 802.11 power saving mode is one of the most popular techniques in wireless LAN and multi-hop wireless networks to coordinate the power states of communication devices. Providing energy efficiency in MAC (Medium Access Control) layer, while achieving desirable throughput, is an important research issue in the area of wireless networking. A wireless LAN such as IEEE 602.11 using the Distributed Coordination Function (DCF) also provides a mechanism for power conservation which allows each node to “sleep” for some amount of periods, but also requires the nodes to wake up periodically and stay “awake” for a certain duration called the ATIM Window. We propose an enhancement called the Traffic Control Power Saving Mode (TC-PSM) to solve this problem by allowing nodes to enter the doze state when they are no more involved in data delivery even if they have already sent a beacon, an ATIM or an ATIM-ACK. Our objective is to reduce the energy consumption without any throttling to throughput.