Research On Energy-efficient Routing In Mobile Wireless Sensor Network

Mobile wireless sensor network(MWSN)is the extension and development of traditional wireless sensor network.It is widely used in all walks of life,such as wildlife habits research,environmental monitoring,enemy invasion monitoring,etc.Its main characteristics are limited energy resources on nodes,limited storage space on nodes and dynamic topology of the network.Mobile wireless sensor network mainly has been used to collect data of monitoring objects,so as to achieve the purpose of researching and controlling the monitoring objects.Therefore,a focus of research on mobile wireless sensor network is designing energy efficient routing protocol.For the problem of energy efficient routing in mobile wireless sensor networks,two energy aware data transmission mechanisms from different perspectives were proposed.The first data transmission mechanism calculates the sensor node's transmission probability by taking into account the sensor node's residual energy,the sensor node's speed and the wireless link loss between the sensor node and the sink node.When a sensor node meets other sensor nodes,it knows the transmission probability of the meeting node through a simple interactive information,and transmits the data message to the meeting node with greater transmission probability than itself.The link loss between the sensor node and the sink node is calculated by the distance from the node to the sink node,and the direction of the motion speed of the sensor node is calculated according to the path loss of the last time and the current.To reduce the energy consumption of the network,we need to update the number of the data message's replicas according to the change of node transmission probability.In addition,to improve the performance of the network,the data messages in the storage queue are managed according to the survival time of them.The longer the survival time of the data message is,the lower the importance of corresponding data is.The second kind of data transmission mechanism refers to the idea of bargainingin economics.The party that needs to forward the data message is the buyer,and the party who receives the data message is the seller.A simple bargaining decides whether a transaction is successful or not.When the buyer and the seller met each other,the buyer and the seller offer the price of the message according to its residual energy,the size of the remaining cache,the delay tolerance of the data message,and the size of the data message.The transaction is successful when the bid is greater than or equal to the price.In addition,in order to reduce the energy consumption of the network,control the number of data message's replicas and delete invalid data messages.The two data transmission algorithms proposed in this paper are implemented through MATLAB7.0,and compared with other routing algorithms to verify the effectiveness of the data transmission algorithms proposed in this paper.The experimental results show that the two data transmission algorithms proposed in this paper have improved the delivery rate of data messages and the life cycle of the network,and have decreased in the number of copies of the data messages compared with other algorithms.