ContributionsWe present a Timing-sync Protocol for Sensor Networks(TPSN) that works on the conventional approach of sender-receiver synchronization. We argue that for sensor networks, theclassical approach of doing a handshake between a pair of nodesis a better approach than synchronizing a set of receivers [6].This observation comes as result of time stamping the packets atthe moment when they are sent i.e., at MAC layer, which isindeed feasible for these networks. To prove our claim, wecompare the performance of TPSN with Reference BroadcastSynchronization (RBS) [7], a timing synchronization algorithmfor sensor networks based on receiver-receiver synchronization.We will show that TPSN gives roughly a 2x better performancethan RBS via implementation on motes. We will show thatTPSN can synchronize a pair of motes to an average accuracy ofless than 20μs and a worst-case accuracy of around 50μs.
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