关键词:  , 无线传感网络, 时间同步, 低功耗, 多跳网络

Abstract:

The low-power and high-precision time synchronization for wireless sensor networks is essential.This paper focuses on a high-precision time synchronization algorithm FTSP (Flooding Time Synchronization Protocol) and finds that in multi-hop networks the time synchronization process generates much redundant information because all of the nodes in each hop must broadcast time synchronization packets.In order to reduce power consumption,this paper proposes a novel approach which selects some nodes called edge nodes by adjusting the transmission power in each hop and allows them to complete time synchronization for the next hop.The other nodes only receive time synchronization packets.Finally,the improved algorithm is carried out on OMNet++ simulator and the results show that the improved algorithm can effectively reduce the energy consumption of the whole network.

Key words: wireless sensor networks;time synchronization;low power;multi hop network