Efficient Time Synchronization Technology of Wireless Network

Time synchronization technology is an important topic in wireless self-organizing networks. It mainly affects the operational efficiency of the network from the aspects of delay, synchronization accuracy, network collision rate. We improve the synchronization delay and flood broadcast time synchronization algorithm respectively so that the time synchronization technology can adapt to wireless ad hoc networks. Firstly, the paper improves the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) backoff algorithm, Secondly, we carry out maximum likelihood compensation for Flooding Time Synchronization Protocol (FTSP) processing delay to reduce synchronization error. Finally, we use clustered FSTP (Clu-FSTP)to reduces the number of flooding nodes and improves the synchronization efficiency. Compared with CSMA / CA and OrderGain algorithm, it greatly reduces the access delay. In a network with 36 nodes, the maximum synchronization error is reduced by about
$1.5\ \mu s$
on average. The number of nodes involved in the broadcast synchronization grouping of the algorithm is lower than that of FTSP around 50%. The improvement of time synchronization technology has very important value for the research progress of communication networks.