Maximum Probable Clock Offset Estimation (MPCOE) to Reduce Time Synchronization Problems in Wireless Sensor Networks

Time synchronization is an essential characteristic for the faithful functioning of wireless sensor networks. Hypothetically, it is stated that the two clocks are considered to be synchronized with each other if their clock offset and frequency components within the oscillator are running at the sam...

Full description

Saved in:
Bibliographic Details
Published in:Wireless personal communications 2020-09, Vol.114 (2), p.1177-1190
Main Authors: Upadhyay, Divya, Dubey, Ashwani Kumar
Format: Article
Language:English
Subjects:
Clocks
Clocks & watches
Communications Engineering
Computer Communication Networks
Engineering
Mathematical models
Message passing
Networks
Protocol (computers)
Sensors
Signal,Image and Speech Processing
Standard error
Time synchronization
Wireless networks
Wireless sensor networks
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Time synchronization is an essential characteristic for the faithful functioning of wireless sensor networks. Hypothetically, it is stated that the two clocks are considered to be synchronized with each other if their clock offset and frequency components within the oscillator are running at the same rate. But, practically, there is some degree of inaccuracy in the manufacturing of these clocks; as a result, their frequency sources have slight variations. This paper proposes a unique mathematical model which is based on maximum probable theory maximum probable clock offset estimation, along with the propagation delay factor for finding the best probable estimate for clock offset. In addition, a novel two-way message passing scheme-based network communication model is presented here. Based on results, it has been predicted that estimating the clock offset will help in improving the efficiency of the existing time-synchronization protocols i.e. time-sync protocol for sensor networks (TPSNs). It was observed that the standard error deviation of modified TPSN with MPCEO was reduced from 2.324 to 0.064 ms. This will make the modified TPSN model more accurate, efficient, and reliable.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-020-07414-y