Research For Technology Of Time Synchronization In The Wireless Sensor Network Based On Applause Synchronization

In Wireless sensor network,there are a lot of wireless sensor network nodes, they canwork together, monitoring and collecting the detected object imformation fron thedetection region, and then make a simple treatment, finally through the wired network orsatellite channel to user. In recent years, sensor technology as an emerging technology,has received wide attention both at home and abroad, and obtained a certain result.Clock synchronization technology as the basis and premise of many wireless sensornetwork applications, is an important supporting technology in many other applications,such as environmental monitoring system, sensor nodes all need relatively high precisionsynchronization, otherwise their acquisition of information can’t mix together well, toreflect the information of the monitored region. In different applications of wirelesssensor network, time synchronization accuracy requirements of sensor networks is not thesame. Sensor nodes due to small size, the quantity is huge, in itself can not carry toomuch energy and power supply device, therefore we need in time within the rangeaccuracy, design an effective algorithm for high accuracy and save the energy.In this paper, the clock on the wireless sensor network presents the current domesticand international synchronization algorithms are analyzed and compared, on the basis ofthis, put forward a clock synchronization algorithm based event trigger, applausesynchronization mechanism. In this algorithm, each node receives the clocksynchronization message monitor node, sends its own clock information to the neighbornode, after receiving the neighbor node, it records the message, and then send its clock tothe neighbor nodes, if the received neighbor synchronization packet exceeds a thresholdor the time a certain threshold more than just modify your clock. Synchronous cycle timereaches a certain threshold would stop the entire system clock synchronization. Becauseof the synchronous operation consumes more energy, The simulation results show that,contrast to the traditional clock synchronization technology, the algorithm can save nodeenergy,and they are high precision clock synchronization. For a head node clocksynchronization, the clock synchronization algorithm based on spanning tree, thealgorithm is divided into two stages, the first stage of the spanning tree structure to createthe entire network, communication and clock synchronization message in the spanningtree, the simulation results show that the algorithm compared with the traditionalalgorithm has a clock lower error, transmission and reduce the clock synchronizationpackets, thereby reducing node energy consumption, prolong the network life.