The Research Of Routing Protocols Based On QoS For Wireless Sensor Networks

Wireless Sensor Networks(Wireless Sensor Networks,WSN) develops into new technology with developments of the wireless communications embedded computing technology,sensor technology and micro-electro-mechanical manufacturing technology,which has broad application prospects and value of scientific research in environmental monitoring.it is composed of a large number of small sensor nodes which are constrained in energy and have limited perception of the data,information processing and wireless communications capabilities,at the same time,inter-nodes connect each other by the way of non-center and wireless multi-hop,network topology dynamic variable,which percepts information and collects and treats the case information in the targets region by mutual collaboration.Wireless network networks' primary challenges we face with is how makes the whole networks' life-cycle maximize.With the depth of the wireless sensor networks,different business operations require special different quality of service(QoS),although some experts and scholars have brought up some routing protocol of QoS,the most of them only bases on one parameter of QoS and which also has some disadvantages.About the current majority of experts and academics committed to study which minimize energy consumption of the whole nodes in wireless sensor networks in order to maximize the survival of life.I see at home and abroad through a wide range wireless sensor network-related information from wireless sensor networks has been the protection of many energy-constrained QoS routing parameters of the study protocol, so that the entire network to meet the many constraints QoS parameters to maximize the life cycle.By referring to the researches at home and abroad,this thesis aims to make further researches on how to provide routing protocol guaranteed by QoS in wireless sensor networks.The following are the main researcher and innovations of this thesis.1) About current classic and hierarchical routing protocols,many experts and scholars committed to s research and improve them,making hierarchical protocols better and better,but there are also some small problems.I have brought up questions about the hierarchical protocol algorithm and revised it,which makes the algorithmic robustness strengthened.The node which energy uses up is the main reason in WSN shorten life cycle,so node priority becomes cluster head node which has maximal surplus energy in the process of dividing cluster,at the same time,have avoided the enormous energy expense of re-organizing,the main energy consume of these handle comes to sink node whose energy are free,therefore,keeping the loads of network balance,making the lifecycle of network maximization.By simulation and analysis, improved divide cluster routing protocol is not only has good performance in energy consumption,but also makes the lifecycle of network longer.2) Because that in wireless sensor networks,different protocols have different advantages and disadvantages under different environment,and every protocol has its own application conditions,so it become very important to research and analyze the performance parameters of different protocols under different conditions.This thesis introduces the concepts and characteristics of wireless sensor networks,concludes classic routing protocols,after analyzing the current routing protocol and simulations models on the base of relative references,makes a simulation and compares the performances of SPEED,SAR and ACA(Ant Colony Algorithm) on the whole surplus energy of nodes,surplus numbers of nodes,packet loss rate and life cycle of WSN.This thesis is supported by the National Natural Science Foundation of China (approval number:60773211,60672137),the Ph.D.Programs Foundation of Ministry of Education of China(approval number:20060497105) and New Century Excellent Talents Programs of China(approval Number:NCET-08-0806).