NDLI: Exploiting manufacturing variations for compensating environment-induced clock drift in time synchronization

Content Provider	ACM Digital Library
Author	Cho, Young H. Srivastava, Mani B. Schmid, Thomas Charbiwala, Zainul Friedman, Jonathan
Abstract	Time synchronization is an essential service in distributed computing and control systems. It is used to enable tasks such as synchronized data sampling and accurate time-of-flight estimation, which can be used to locate nodes. The deviation in nodes' knowledge of time and inter-node resynchronization rate are affected by three sources of time stamping errors: network wireless communication delays, platform hardware and software delays, and environment-dependent frequency drift characteristics of the clock source. The focus of this work is on the last source of error, the clock source, which becomes a bottleneck when either required time accuracy or available energy budget and bandwidth (and thus feasible resynchronization rate) are too stringent. Traditionally, this has required the use of expensive clock sources (such as temperature compensation using precise sensors and calibration models) that are not cost-effective in low-end wireless sensor nodes. Since the frequency of a crystal is a product of manufacturing and environmental parameters, we describe an approach that exploits the subtle manufacturing variation between a pair of inexpensive oscillators placed in close proximity to algorithmically compensate for the drift produced by the environment. The algorithm effectively uses the oscillators themselves as a sensor that can detect changes in frequency caused by a variety of environmental factors. We analyze the performance of our approach using behavioral models of crystal oscillators in our algorithm simulation. Then we apply the algorithm to an actual temperature dataset collected at the James Wildlife Reserve in Riverside County, California, and test the algorithms on a waveform generator based testbed. The result of our experiments show that the technique can effectively improve the frequency stability of an inexpensive uncompensated crystal 5 times with the potential for even higher gains in future implementations.
Starting Page	97
Ending Page	108
Page Count	12
File Format	PDF
ISSN	01635999
DOI	10.1145/1384529.1375469
Journal	ACM SIGMETRICS Performance Evaluation Review (PERV)
Volume Number	36
Issue Number	1
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-01-10
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Emulation Oscillator Time synchronization Clocks
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Exploiting manufacturing variations for compensating environment-induced clock drift in time synchronization

Exploiting manufacturing variations for compensating environment-induced clock drift in time synchronization. Sigmetrics (2008).

Rate-adaptive time synchronization for long-lived sensor networks

Hardware Assisted Clock Synchronization for Real-Time Sensor Networks

Resiliency of distributed clock synchronization networks

PC based precision timing without GPS

WizSync: Exploiting Wi-Fi Infrastructure for Clock Synchronization in Wireless Sensor Networks

Tracking Low-Precision Clocks With Time-Varying Drifts Using Kalman Filtering

Interval based off-line clock synchronization for wireless mesh networks

Exploiting manufacturing variations for compensating environment-induced clock drift in time synchronization

Similar Documents

Exploiting manufacturing variations for compensating environment-induced clock drift in time synchronization

Exploiting manufacturing variations for compensating environment-induced clock drift in time synchronization. Sigmetrics (2008).

Rate-adaptive time synchronization for long-lived sensor networks

Hardware Assisted Clock Synchronization for Real-Time Sensor Networks

Resiliency of distributed clock synchronization networks

PC based precision timing without GPS

WizSync: Exploiting Wi-Fi Infrastructure for Clock Synchronization in Wireless Sensor Networks

Tracking Low-Precision Clocks With Time-Varying Drifts Using Kalman Filtering

Interval based off-line clock synchronization for wireless mesh networks

Exploiting manufacturing variations for compensating environment-induced clock drift in time synchronization