Research on the Dynamic Power Control the S-MAC in the Wireless Sensor Network

Abstract

Aiming at the Sensor-MAC (S-MAC) framework, the paper introduces the technology of controlling and adjusting the Multi-Step power. When the transmitting nodes transmit the data packets to the receiving nodes, the receiving nodes can measure the Received Signal Strength Indication, which are then transmitted back to the transmitting nodes, which is the basis of distinguishing the transmitting power. It was observed that the power of the Received Signal was larger than the threshold set at the receiving terminal. The error rates of receiving the packets can be reduced by the retransmission caused by the loss of the packets, whereas the throughput of the system can be increased. The simulated results show that the range of the throughput and the packets' successful receiving rate, which is included in the power control S-MAC as the different packet collision rate and the bounded packet re-transmission power, were increased by 3%~10% compared with that which is not included in the power control S-MAC in Multi-hops.