NDLI: Reduce Time Synchronization Cost for High Latency and Resource-Constrained Sensor Networks

Content Provider	IEEE Xplore Digital Library
Author	Yi Wang Benxiong Huang Furong Wang Fan Zhang
Copyright Year	2008
Description	Author affiliation: Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., Wuhan (Yi Wang; Benxiong Huang; Furong Wang; Fan Zhang)
Abstract	For emerging resource-constrained sensor networks, energy efficiency and computation simplicity could be as important as precision. Existing terrestrial synchronization protocols have already achieved high precision in radio networks, but none of them perform well in high latency networks like underwater acoustic sensor networks: they either assume instantaneous packet transmission between nodes, or ignore clock drift during synchronization process. By addressing these problems, the recent proposed TSHL protocol provides precise time synchronization for high latency networks. However, due to its high energy and computation consumption, original TSHL design is still not practical in resource-constrained applications such as sensor networks which have stringent constraints on system resources. The main results of this paper are as follows. First, we present a complete mathematical analysis of TSHL which is lack in the original paper. Dominant factors of errors are clarified, as well as communication and computation cost functions. We prove that even with as less as 3 beacon messages, an acceptable precision level can be achieved by increasing beacon messages interval. In this lightweight synchronization, communication and computation cost for the synchronization process are greatly reduced, which is critical for those high latency and resource-constrained sensor networks.
Starting Page	111
Ending Page	116
File Size	338236
Page Count	6
File Format	PDF
ISBN	9780769531069
DOI	10.1109/ICN.2008.19
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-13
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Costs Protocols Acoustic sensors Radio network Computer networks Energy efficiency Synchronization Underwater acoustics Delay Clocks
Content Type	Text
Resource Type	Article

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