An Opportunistic Routing in Energy-Harvesting Wireless Sensor Networks With Dynamic Transmission Power

In energy-harvesting wireless sensor networks (EH-WSNs), node can harvest energy from the environment. However, the energy harvested is usually insufficient, time varying and unbalanced. In order to make full use of the energy harvested from the environment, each node can dynamically adjust its transmission power which may affect the associated link quality. Thus, the link quality between two same nodes is dynamic. For the forwarding node, the transmission cost of it and its one hop candidate relay node may change at any time. In this scenario, for the design of opportunistic routing, the size, members and priorities in the relay set need to be updated dynamically. In this paper, we propose an opportunistic routing in EH-WSNs with dynamic transmission power (ORDTP). ORDTP can help the sending node collect information of neighbor nodes in time, accurately estimate the transmission cost, and dynamically update the size, members and priorities in the relay set. The simulation results show that ORDTP can effectively reduce the delay, improve the transmission success rate, and reduce the packet redundancy rate.