Routing Protocol Based On Vector And Energy In Underwater Wireless Sensor Network

Water covers an area of about 3/4 of the world,and Underwater Wireless Sensor network(UWSN)is an extension and expansion on the basis of land sensor networks.The research in this direction plays an increasingly important role in exploring the earth and understanding the living environment of mankind.At the same time,UWSN has some unique features,such as the difficulty in positioning the underwater sensor nodes,the difficult to replace the battery,the limited time delay and the limited bandwidth,and the continuous change of the network topology.Therefore,we must study network technology suitable for underwater applications.Now some mature routing technologies are developed on the background of terrestrial sensor networks.The huge difference of environment can not make them well used in underwater.UWSN has the characteristics of high energy consumption,low data transmission efficiency and dynamic topology change.In view of the mobility of nodes in underwater environment,this paper proposes a routing protocol based on vector and energy.Through the study of the theoretical basis and the analysis of the routing strategy of traditional underwater acoustic sensor networks.Tocol based on vector and energy.In the VER protocol,the vector is established from the source node to the Sink(sink node)node,and the distance priority is determined according to the distance from the candidate node to the vector.The middle node only needs a simple calculation to complete the selection of the best next hop node.In the VER protocol,it does not need harsh presupposition conditions,and the change of node position will not affect the routing process.At the same time,in order to ensure the energy balance and prolong the network life,the protocol combines the residual energy of the candidate node and the distance between the source node and the vector of the Sink node to select the next hop.To make the underwater nodes with high residual energy in the similar distance conditions be selected as the next hop to alleviate the problem of excessive sparse nodes in the water.Because the transmission direction of the data packet is from the bottom to the surface of the water,the biggest problem is that the closer the distance from the water surface,the greater the energy consumption,the more easy to die.When the energy of the nodes near the water surface is exhausted,there is a lot of residual energy in the nodes in the deep water.If the actual applicationof the detection object is a relatively closed water environment,such as lakes and reservoirs,the decrease of the delivery rate of the data packet is obviously unable to meet the requirements of the collection of data,it will supplement the nodes in the monitoring area,and the energy of the nodes will be optimized after many times,and the VER protocol can reduce the relative section in this application.The added frequency of the point reduces the cost.If the actual application is in the unstable environment of rivers and other topological structures,this method can slow down the sparsity of underwater nodes to a certain extent.VER protocol is more suitable for underwater acoustic sensor network caused by flow and other reasons.