The Research On Reliable Data Transmission Method In WSNs

As one of the three pillars of information technology,wireless sensor networks are becoming more and more widely used.Wireless sensor network is a self-organizing network with a large number of sensor nodes.Sensor nodes sense various physical or environmental conditions within the network and communicate with each other and have very limited resources,especially energy.In addition,there are many unforeseen factors in the wireless sensor network environment,such as the on-site environment,attenuation,dead zone,etc.These factors will cause sensor node failure,and will also cause errors and packet loss during data transmission.This paper is mainly about the research of reliable data transmission methods for wireless sensor networks.In wireless sensor networks,node clustering can effectively save energy,improve data transmission efficiency,and extend the network life cycle.The EEHCN(Energy Efficient Hierarchy-based Clustering Neighbor)proposed in this paper determines whether the node can become a cluster head node by comparing the comprehensive weight of the degree of the sensor node and the distance between the sensor node and the center of the sub-area.At replacing cluster head stage,member nodes in the set of neighbor nodes of current cluster head turn into a new cluster head in a random time slice,and the merged information is transmitted to the nearest sink node by using a multi-hop manner according to the routing information.Simulation results demonstrate that the proposed method can better save network energy,improve data transmission efficiency and maximize network lifetime.In a dense distributed wireless sensor network,a large number of conflicts will occur in the process of data transmission,which will result in the loss of transmitted data and the increase of transmission delay.The multi-path data transmission method can effectively reduce data loss and large transmission delay caused by collisions.The redundancy-based concurrent braided multipath reliable transmission method(RCB-MRT)proposed in this paper divides the data packets that the sensor nodes need to transmit into several sub-packets with data redundancy,and then forwards them to the aggregation through multi-path through the intermediate nodes.node.The experimental results show that the proposed multipath reliable transmission method can effectively reduce data packet loss rate,reduce transmission delay and increase network lifetime.