Abstract: For power efficiency and capacity in ad hoc networks, a novel joint power saving and power controlled medium access control (MAC) protocol called PSPC is proposed in single-channel networks. PSPC is made up of two periods in a beacon interval: ATIM (Ad hoc Traffic Indication Message) period and data transmission period. At the beginning of ATIM, nodes wake up simultaneously and exchange the control message to estimate the power to be used in later data transmission. At the same time, receivers inform neighbour nodes of their allowable maximum transmission power for avoiding interference to allow for concurrent transmission in the same vicinity. After the end of ATIM, nodes can decide their transmission power level and whether they can transmit data on the information they have exchanged in the ATIM. If nodes cannot transmit data or have no data to transmit, they enter the sleeping state until the end of this beacon interval. Simulation results demonstrate the significant throughput and energy gains that can be obtained under the PSPC protocol.

Key words: power saving, power control, Ad Hoc network