Clock Synchronization in Wireless Sensor Networks: An Overview

Sensors

Ill-Keun Rhee²  Jaehan Lee¹  Jangsub Kim¹  Erchin Serpedin¹ 

[1] Department of Electrical and Computer Engineering, Texas A&M University / TAMU 3128, College Station, TX 77840-3128, USA; E-Mails:;Department of Electronic Engineering, Hannam University / 133 Ojung-Dong, Daeduck-Gu, Daejun, 306-791, Korea; E-Mail:

关键词: Wireless sensor networks;    Clock synchronization;    Clock offset;    Clock skew;   

DOI  :  10.3390/s90100056

来源: mdpi

【 摘 要 】

The development of tiny, low-cost, low-power and multifunctional sensor nodes equipped with sensing, data processing, and communicating components, have been made possible by the recent advances in micro-electro-mechanical systems (MEMS) technology. Wireless sensor networks (WSNs) assume a collection of such tiny sensing devices connected wirelessly and which are used to observe and monitor a variety of phenomena in the real physical world. Many applications based on these WSNs assume local clocks at each sensor node that need to be synchronized to a common notion of time. This paper reviews the existing clock synchronization protocols for WSNs and the methods of estimating clock offset and clock skew in the most representative clock synchronization protocols for WSNs.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.