Research On Data Transmission Technology In Buffer-aided Sensor Networks

In recent years,with the popularity of smart terminals such as smart phones and tablet computers,the rapid exponential growth of data traffic and the extreme complexity of data architecture type have created a new era of the development of information society,and the concept of big data has begun to appear in People's Daily life.Wireless sensor network(WSNs)is an important source of mass data collection.How to make sensor nodes transmit more data and improve network throughput has gradually become a research hotspot.Due to the small size and limited functions of a single sensor node,data transmission congestion may be caused and the communication quality may be affected.So sensor nodes must have caching assist.In previous studies,researchers have basically defined the cache capacity of nodes by assuming that the cache capacity of nodes is infinite.However,this is not the case,and the channel condition between nodes is not always good.Based on the above understanding,this paper takes the construction of green sensor network as the goal,and studies the balance between energy efficiency and throughput of mass data transmission in WSNs by optimizing the data transmission strategy within the network and combining with relevant technologies.The main research results are summarized as follows;In WSNs,we first select the LEACH clustering protocol to cluster the WSNs,and then select one of the small clusters,against the source node to relay node communication channel status and relay node to the destination node channel of communication in different situations,by adjusting the relay nodes forward every time the amount of data that the system of communication stage can be divided into different time slot,then theory deduce the average throughput of the communication time slot with the total power consumption,and the average throughput of different cache capacity system comparing with the total power consumption,through the simulation results to choose suitable for the optimal conditions of system transmission.In the WSNs after LEACH clustering protocol clustering,select one of the cluster,in view of the large amount of data under the condition of the cache area of the relay node is empty or full of probability is larger and cause the system throughput is reduced,we design a relay selection scheme,by reducing the relay node the probability of the buffer is empty or is filled,indirect improve the system throughput.Through simulation,it is found that using the residual cache capacity of relay node to assist the channel state between sensor nodes in the selection of communication link will improve the average throughput of the system,and the effect is better than the traditional optimal relay selection scheme.