Asynchronous power management scheme for wireless ad-hoc networks

In wireless ad-hoc networks, power-saving by the terminals is a very important issue since their operation depends on limited battery-power. To reduce their power consumption the terminals are allowed to enter a low-power mode (LPM) in many wireless networks. However, as there is no clock synchronization of information transmission in ad-hoc networks, the problem occurs that terminals do not know when a neighboring terminal in LPM awakes. We propose a novel power management scheme using SLEEP _TABLE to solve this problem. Simulation results show that the proposed scheme outperforms 802.11 LPM and the conventional scheme in terms of power saving, and the power consumption of each terminal is distributed.