Chaining Clock Synchronization: An Energy-Efficient Clock Synchronization Scheme for Wireless Sensor Networks

— Since WSNs have restricted energy sources, the energy efficiency of a synchronization scheme is as important as the accuracy of a clock. To accomplish both the energy efficiency and the accuracy, we propose a new clock synchronization scheme called Chaining Clock Synchronization (CCS). In CCS, a subset of nodes whose transmission range cover the overall network carries out a two-way message exchange algorithm while the remaining nodes synchronize themselves by overhearing the messages. To reduce the energy consumption associated with the message exchange, CCS integrates a clock request and a clock reply into a single message. Therefore, CCS requires only a single message transmission per node for the synchronization. To increase the accuracy of the clock synchronization, we also propose a new technique called clock skew propagation to reduce the error accumulation associated with multi-hop clock synchronization schemes. According to the results from NS-2, in comparison with TPSN, C...

• Type: Conference
• Year: 2009
• Where: ISPAN
• Authors: Sang Hoon Lee, Lynn Choi
• Keywords: Clock Synchronization, Clock Synchronization Schemes, Distributed And Parallel Computing, ISPAN 2009, Multi-hop Clock Synchronization