Energy-efficient multi-hop scheme based on routing algorithm in wireless sensor networks

Energy conservation is critical in wireless sensor networks. Conventionally, energy consumption is represented by 1/dα, when d is the distance between a TX and a RX, and α is the path-loss (generally between 2 and 4 for indoor environments). Such a correlation between the energy consumption of sensor node and the distance between a transmitter and a receiver allows a researcher to develop multi-hop routing algorithms rather than single-hop routing algorithms even in the networks with densely placed sensor nodes. Short-ranged multi-hop routing algorithms, however, induce noticeable energy consumption particularly under the two situations 1) when the TX mode is changed to the RX mode and when the RX mode is changed to the TX mode and 2) when CSMA/CA is used. A large-scale network would require more frequent switching and hop counts. To reduce these overhead, we propose a energy-efficient multi-hop scheme based on routing algorithm (EEMS), which use relatively minimum hop count and node weight. Simulation result presents that our proposed scheme shows better performance for network survivability.