Research On Routing Protocols And Based On Energy-Harvesting Wireless Sensor Network

In order to overcome battery limitation, Wireless sensor network Powered by Ambient EnergyHarvesting (WSN-HEAP) is developed from traditional wireless sensor network powered by battery.The sensor nodes of WSN-HEAP can harvest power from the environment by means of energyscavengers, the rate of energy harvesting changing with the environment. Routings of traditionalwireless sensor do not take into account environment power, so it does not suit for the WSN-HEAP.The objective of routing optimization in this context is not extending network life like traditionalrouting, but maximizing the workload that can be autonomously sustained by the network.In this context puts forward two kinds of improvement: A kind of improvement is based onDirect Diffusion routing, this context mainly changes the result of degree, because of the result ofdegree is crucial important in Direct Diffusion routing. The changed routing can apply to theWSN-HEAP at last. In order to obtain better throughput rate, another kind of improvement is basedon Ford-Fulkerson algorithm. Ford-Fulkerson algorithm is one algorithm that can solve the questionof max-flow, By comparison this context select Ford-Fulkerson algorithm from other algorithmbecause it is easy to understand. Tolerance determination and one-way transmission constraint areintroduced to improve Ford-Fulkerson algorithm. This algorithm is at last used in energy-harvestingwireless sensor networks. Experiments show that the proposed algorithm is not only well applied toenvironmentally-powered wireless sensor networks, but also improve system performance. Due totime and limited ability, there are some questions need to be solved.