Research On Energy Balanced Routing And Time Synchronization Algorithm For Wireless Sensor Network

Wireless sensor networks have broad application prospects in military defense,industrial and agricultural control,health care,environmental monitoring,and disaster relief,and other fields.The pros and cons of routing algorithm is directly related to the performance of wireless sensor network data communication.Due to the wireless sensor network energy limited,how to save energy make the energy consumption of nodes in a network balanced to prolong the network lifetime is a key problem of wireless sensor network(WSN)research.Paper first compares the advantages and disadvantages of the flooding,directional diffusion DD,minimum the hop MHC,Low Energy Adaptive C lustering Hierarchy Leach,based residual energy BRT-Flooding of WSN routing algorithm.Then use the NS2 software for EBRT,MHC and BRE-Flooding routing algorithm to simulation,the performance of the contrast analysis routing performance such as the node energy consumption,the end-to-end delay and nodes failure.EBRT algorithm used delayed forwarding mechanism send cross radio message packet,ensure the global routing information update in real time and the effectiveness,but need the right timing synchronization by news package.Aimed at this problem,this paper proposes a routing synchronization mechanism based on cross radio,increase the time field in the cross broadcast packets,computing cross radio message packet generation time,and through the exchange of cross radio news package for the time synchronization.C hain synchronization algorithm does not need timing reference node and synchronization,eliminate the step by step's cumulative error,when individual node failure will not affect the robustness of the whole algorithm.Paper and then by the method of maximum a posteriori estimate phase deviation between nodes,to further improve the synchronization accuracy.Finally,the paper studied the congestion control problem of wireless sensor networks from the congestion detection?congestion avoidance and congestion release,a congestion control strategy was made based on the transfer list,can solve the congestion problem of wireless sensor network.