Sensor Network Time Synchronization Technology

Time synchronization is an important subject in wireless sensor networks, which has a great significance in locating of sensor network node and so on. In this paper, focuses on time synchronization algorithms especially and puts forward new algorithms for energy saving.Firstly, according to the latest time deviation and time synchronization cycle, time synchronization algorithm is put forward in this article, which is about time synchronization of changeable cycle. The synchronized cycle selection must fully consider wireless sensor node to pitch point transmission when extends the vibration, it considered when this transmission extends in preceding is next the interpolation, calculates a supplement value to reduce the influence which the vibration brings. Compares with the fixed cyclical time synchronization algorithm, this algorithm can reduce the expenses of synchronous protocol.Secondly, time synchronization algorithm is proposed based on MCDS, which makes the node of the connection control collection as the broadcast node to send message. But the node of half-connection control collection finish the time synchronization task of itself not to retransmit the message. The algorithm can reduce the number of message retransmitted, and save the energy expense of broadcast.The time synchronization algorithm based on response is also put forward in this paper. That is to set a base time node in single broadcasting area and interchange synchronized messages between the base nodes and the third party, and other nodes only receive the synchronized messages, so as to achieve time synchronization by itself with all the receiving nodes in a single broadcasting area.In the end of the paper, I make a conclusion to make a point of the various...