Transmission power control in single-hop and multi-hop wireless sensor networks
Faculty of Computing, Health and Science
School of Engineering
A major challenge in wireless sensor networks (WSNs) deployment is to minimize sensor node’s energy consumption to prolong the lifetime of the finite-capacity batteries. Power control is one of the main techniques used to conserve energy in wireless sensor networks, particularly in star topology/cellular networks. In this paper we provide a study on transmission power control (TPC) in multi-hop and single-hop wireless sensor networks using typical Telosb platform parameters, which is IEEE 802.15.4 standard compliant. We offer a new approach to test TPC in multihop networks at the physical layer, and provide energy consumption performance results via simulation and numerical model. Our simulation and numerical model results illustrate that energy spent to send packets using short-range multi-hop path instead of single-hop does not necessarily save energy as suggested by some of the earlier research. However, in single-hop networks, we found that we can save energy by transmitting at lower transmission power levels while still maintaining reliable connectivity, resulting in up to 23% reduction in energy consumption.