Wireless sensor networks: a new regime for time synchronization
ACM SIGCOMM Computer Communication Review
Timing-sync protocol for sensor networks
Proceedings of the 1st international conference on Embedded networked sensor systems
The flooding time synchronization protocol
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Reliable time synchronization protocol for wireless sensor networks
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
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Time synchronization is a prerequisite in sensor network applications such as object tracking, consistent state updates, duplicate detection, and temporal order delivery. In addition, reliability issues and fault tolerance in sophisticated sensor networks have become a critical area of research today. However, most research on time synchronization does not consider clock faults of nodes such as fluctuation, severe changes in drift rate, and so on. In this paper, we propose a fault tolerant time synchronization method for wireless sensor networks. In the proposed method, two cases of fault model: (1) clock faults and (2) network faults (topology changes) are assumed. In order to evaluate the performance of the proposed method, a simulation model is established in the NESLsim based on the PARSEC platform. In the simulation, the effect of clock faults is analyzed. Simulation results show that the proposed scheme has about 1.5x~2x better performance than TPSN (Timing-sync Protocol for Sensor Networks) in the presence of faults.