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| Authors: | Roman Lim, Balz Maag, Lothar Thiele |
| Group: | Computer Engineering |
| Type: | Inproceedings |
| Title: | Time-of-Flight Aware Time Synchronization for Wireless Embedded Systems |
| Year: | 2016 |
| Month: | February |
| Pub-Key: | LMT2016 |
| Book Titel: | Proceedings of the 13th International Conference on Embedded Wireless Systems and Networks (EWSN 2016) |
| Pages: | 149-158 |
| Keywords: | SN, time synchronization, propagation delay |
| Abstract: | Accurate time synchronization is an important prerequisite for many applications. Synchronization down to sub-microsecond precision, as required by distributed control in automation or network event analysis, is prevalently a domain of wired or expensive GPS-enabled systems. Existing time synchronization protocols for wireless embedded systems exhibit errors that are orders of magnitude higher. We identify propagation delay compensation as a key requirement to achieve sub-microsecond precision in typical deployments. As a result, we present the Time-of-Flight Aware Time Synchronization Protocol (TATS), a new protocol that combines fast multi-hop flooding and message delay compensation at similar message cost as existing delay-unaware protocols. Experiments conducted in a public testbed of 31 nodes show that TATS achieves sub-microsecond synchronization error over 22 hops, while outperforming state-of-the-art protocols by a factor of up to 6.9. |
| Location: | Graz, Austria |
| Resources: | [BibTeX] [ External LINK ] |
