Abstract: Energy harvesting wireless sensor networks are an very important kind of passive sensing technology,which can effectively solve the problem of limited energy of nodes,and maintain continuous operation.Existing routing algorithm does not take advantage of the energy harvesting characteristics of nodes,and does not take the packet delivery ratio and the data rate into account.For improving the performance of the network,we proposed a data rate adaptive routing algorithm combining the packet delivery ratio of wireless link.Two constraints that a relay node on packet delivery route must be required to meet,were given by modeling the residual energy of nodes and the packet delivery ratio of wireless link.Through optimization equation,the data rate which can minimize the packet delivery delay over each hop on route was adaptive configured,and the route discovery procedure was proposed to find the packet delivery path to reduce the end to end delay.Experimental results show that the proposed algorithm can obtain the lower packet delivery delay and the higher throughput than fixed rate routing algorithm in energy harvesting wireless sensor networks.

Key words: Energy harvesting,Wireless sensor networks,Data rate adaptive,Routing algorithm