Paper Info
Title
Precise location tracking system based on time difference of arrival over LR-WPAN
Abstract
As the era of ubiquitous computing approaches, there is a growing need for a reliable, efficient positioning and tracking system. Localization involves continuous determination and tracking of the location of assets and personnel. Localization using time difference of arrival (TDOA) involves determining the location of a tag by calculating the time difference of arrival of the signal received from the tag. In order to calculate the time difference of the signal, TDOA-based methods require precision time synchronization of within a few nanoseconds. This paper presents a location tracking system(LTS), which consists of readers, tags, and an engine, based on TDOA in IEEE 802.15.4. In addition, we propose a precise time measurement method and a precision time synchronization protocol which provides a common clock with an accuracy of within a few nanoseconds. The proposed precision time synchronization protocol results in accurate locating services. The performance shows that readers achieve precision time synchronization of within 5 nanoseconds from a reference clock, and the location tracking system has a location error of within 2 meters.
Year
DOI
Venue
2008
10.1145/1410012.1410028
MELT
Keywords
Field
DocType
precise location tracking system,precision time synchronization,precision time synchronization protocol,reference clock,location tracking system,location error,time difference,precise time measurement method,common clock,protocol result,proposed precision time synchronization,tracking system,time difference of arrival,ubiquitous computing
Metre,Computer science,Time synchronization,Tracking system,Real-time computing,Time difference,Multilateration,Ubiquitous computing,Time of arrival
Conference
Citations 
PageRank 
References 
1
0.44
9
Authors
6
Name
Order
Citations
PageRank
Hyuntae Cho18814.10
Yeonsu Jung2183.87
Hoon Choi322523.95
Hyunsung Jang4122.92
Sanghyun Son5125.74
Yunju Baek615623.54