Energy balanced transmission range adjustment in wireless sensor networks

Recent studies show the capacity of WSNs can be significantly increased when the nodes can have variable transmission ranges. It is well known that in wireless sensor networks (WSNs), the network lifetime can be prolonged by using energy efficiently and keeping as more sensors alive as possible. This can be achieved by balancing the sensors' energy consumption. In this paper, the trade-off between the energy balance and energy efficiency is considered in a linear sensor network with variable transmission ranges. To cope with the trade-off between the energy balance and energy efficiency, a non-linear optimization problem is formulated to find the optimal route nodes and their various transmission ranges. Numerical results show the presented scheme can achieve energy consumption balance and high efficiency at the same time.