Cross-layer sensor network synchronization

Zhi Tian, Xiliang Luo, Georgios B. Giannakis

Research output: Contribution to journalConference articlepeer-review

10 Scopus citations

Abstract

Traditional network synchronization assumes perfect physical-layer (PHY) tuning. However, the operating environment of wireless sensor networks is quite challenging to warrant perfect PHY timing. To account for PHY tuning errors, we pursue a joint PHY/network-layer synchronization approach. At the PHY, we adopt a timing synchronization scheme that offers cost-effective wireless ad hoc access. The variance expression of this synchronizer is derived to shed light on its deviation from the ideal timestamps involved in a network timing protocol. This variance also motivates altering the random medium access control to effect a new network-level timing protocol based on Time-Stamp Broadcast Synchronization (TSBS), capable of attaining accurate clock synchronization with low energy consumption. Our design and analysis account for cross-layer issues in synchronizing practical wireless sensor networks.

Original languageEnglish (US)
Pages (from-to)1276-1280
Number of pages5
JournalConference Record - Asilomar Conference on Signals, Systems and Computers
Volume1
StatePublished - Dec 1 2004
EventConference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: Nov 7 2004Nov 10 2004

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