Study On Data Transmission Technology Based On Individual Soldier In WSN

Facing to a more and more complex battlefield environment in the future information warfare,if we can obtain more information from the enemy in advance,we will take one step ahead of the opponent and win the priority.The soldier equipped with the individual combat system has its unique advantages in mobility and concealment,and is especially suitable for collecting information deep into the enemy territory.Therefore,we could spread a large number of sensor nodes in the reconnaissance area,at the mean time equip our individual soldiers that have been scattered throughout the area with sensor nodes as well.Then a wireless sensor network(WSN)can be formed and realize the exchange of information between the individual soldier and the sensor node,the individual soldier and the superior command center.Therefore,the study of reliable data transmission technology in WSN is of great significance.By analyzing the structure and characteristics of WSN and summarizing the reliable data transmission technologies,this thesis determines the research ideas and goals based on the lack of existing data transmission technologies.The main contributions are as follows:Firstly,A Fermat-point-based single-hop mobile location estimation routing(SHMLER)protocol is proposed and is implemented with fountain code.When source nodes send packets to destination nodes via relay nodes,SHMLER not only makes the total distance the shortest,but also reduces delay time of packet transmission and improves the fault tolerance rate of the nodes by increasing node redundancy.Owing to the mobility of the individual soldier,corresponding position estimation routing schemes are proposed for the node movement status,which makes the routing near-optimal in the transmission process.Under the same scenario,the simulation results show the following conclusions:(1)Fountain code has a higher success rate and lower transmission delay than the data packet without coding.(2)Compared with AODV protocol,SHMLER has higher throughput.(3)With the increase of the sending rate of the source node,the gap between the throughput of the two protocols will increase.Secondly,An adaptive hierarchical multi-hop routing(AHMHR)protocol based on energy balance is proposed.During transmitting data to the command center,the energy load in the network is unbalanced due to the unbalance of the node task assigned and the dynamic changes of network topology.Thus,it is extremely possible that some nodes do not work due to exhausted energy.Node failure will result in the link interruption and packet loss,affecting the reliability of data transmission.AHMHR can solve those problems through the following steps:(1)WSN is adaptively divided into several clusters according to the initial position of nodes.(2)Each cluster establishes a cluster head seletion mechanism according to the mobile position of nodes,residual energy and relative movement speed with other nodes in the cluster,at the same time establishes an optimal multi-hop path from the current cluster head to the command center.(3)When transmitting packets,nodes send packets to the cluster head,and then the cluster head along the optimal path sends the packets to the command center.(4)In order to maximize WSN lifetime,cluster heads will adaptively adjust the transmission power according to the required transmission range.The simulation results prove that AHMHR,compared with the LEACH,LEACH-Mobile and CBR-Mobile protocols,has a higher success rate of packet transmission,lower transmission delay and transmission energy consumption regardless of the ratio of node movement or the speed of node movement.Hence,AHMHR can achieve energy balance and prolong WSN lifetime.