Research On QoS Based On Energy Consumption In Wireless Sensor Network

With the development of information technology,wireless sensor networks have been widely used in different fields,such as military,political,and medical and other fields.Because the density of the nodes is large in wireless sensor network,the size of the nodes is small,the nodes have limited battery energy and are often deployed in the terrible environment,so it is difficult to replace the nodes.Therefore,it is a problem to reduce energy consumption and prolong the network lifetime effectively that wireless sensor networks need to solve urgently.In addition,wireless sensor network has many advantages such as easy deployment and low cost,so it is often deployed in more important places,making the network need strict QoS configuration technology.At present,the QoS protocols proposed for traditional Ad Hoc networks all suffer from a lot of overhead caused by end-to-end path discovery and resource reservation,so they are not suitable for wireless sensor networks.Based on the particularity,two kinds of QoS mechanisms are proposed:(1)The QoS mechanism based on cross layer architecture in the WSN:the main contribution is that this approach adopts cross layer architecture to implement the QoS mechanism.The approach is mainly modularized to implement the various functions.For the delay sensitive packets,it is mainly through the differentiated service module to realize.For example,the packets are put into two queues of the buffer:high priority data packet queue and normal packet queue.When data packets being sent,packets of high priority queue are often sent firstly,so as to ensure that the delay sensitive packets are received in time.In addition,in the wake-sleep mechanism,the sleep and wake-up power waste of the node is calculated,and it saves energy and does not affect the performance.Finally,considering the size of the available buffer for the adjacent sensor nodes,the optimal energy consumption of the adjacent sensor nodes,the number of hops and the link quality,the best choice for next hop is made.Through experiments it can be found that the algorithm has obvious improvement in the delivery rate,at the same time the packet loss rate is reduced in the transmission process,but also it can reduce the energy consumption to a certain extent,so the overall performance of the scheme is better.(2)The energy consumption mechanism based on QoS in the WSN of multi mobile sink nodes:the main contribution is to introduce the mechanism of multiple mobile sink nodes.First of all,the network is divided into several autonomous areas according to K-means clustering method,and each autonomous area is assigned one mobile sink;and then the trajectory of the mobile sink is determined through the SVR method;finally the depth and queue potential field is introduced to transmit packet with high integrity and delay sensitive through Improved-IDDR algorithm.The end-to-end delay of the algorithm is decreased by choosing the shortest path,and at the same time,the data packets that require high integrity of data can improve the performance through low load paths.The effectiveness of the scheme is proved by the simulation experiment.