Fine-grained time synchronization for mission-critical DTSNs

Seng Yong Lau, Ling Jyh Chen, Yu Te Huang, Po Yen Lin, Yi Hsuan Chiang, Jyh How Huang, Kun Chan Lan, Hao Hua Chu, Polly Huang

研究成果: Conference contribution

摘要

It is generally considered a trivial task to synchronize time in a distributed sensor network having a GPS module on board for each sensor node. This is not quite true depending on the application at hand. Commissioned to implement YuShanNet, a delay-tolerant sensor network (DTSN) enabling encounter information collection for hiker search and rescue, we find that the naive use of standard GPSs time acquisition functionalities gives a synchronization error at the scale of 10-100s milliseconds, which is not sufficient given two application-specific considerations: (1) data goodput and (2) energy efficiency. The two requirements are crucial in that the matter is life or death and the hiking trips usually take days. Towards efficient use of the intermittent connectivity in YuShanNet, we design, implement, and evaluate a time synchronization mechanism that improves the synchronization accuracy by approximately two orders of magnitude. This enables TDMA-fashioned MAC for high-goodput data transmission while the GPS is duty-cycled for energy efficiency.

原文English
主出版物標題9th International Conference on Networked Sensing Systems, INSS 2012 - Conference Proceedings
出版狀態Published - 2012 八月 20
事件9th International Conference on Networked Sensing Systems, INSS 2012 - Antwerp, Belgium
持續時間: 2012 六月 112012 六月 14

出版系列

名字9th International Conference on Networked Sensing Systems, INSS 2012 - Conference Proceedings

Other

Other9th International Conference on Networked Sensing Systems, INSS 2012
國家/地區Belgium
城市Antwerp
期間12-06-1112-06-14

All Science Journal Classification (ASJC) codes

  • 電腦網路與通信

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