Title :
ELOTS: Energy-efficient local optimization time synchronization algorithm for WirelessHART networks
Author :
Mingjie Fang ; Yuping Sun ; Xiaohui Zhang ; Jianhua Sun
Author_Institution :
Wuhan Second Ship Design&Res. Inst., Wuhan, China
fDate :
March 31 2014-April 3 2014
Abstract :
The traditional Reference Broadcast Synchronization (RBS) algorithm and its efficient version ERBS algorithm have a problem that the network overhead is very high as the number of nodes in WirelessHART networks increases. In this paper, an energy-efficient local optimization time synchronization algorithm is proposed. This algorithm at first computes the mean time offset for neighbor nodes receiving multiple reference messages, estimates the time offset by the maximum a posteriori estimation and finally adjusts the local clock according to the estimation. The simulation results indicate that, the time synchronization precision of this time synchronization algorithm is about 196% higher than that of RBS and 25% higher than ERBS; also, its network overhead and energy consumption are greatly reduced.
Keywords :
Zigbee; maximum likelihood estimation; optimisation; protocols; synchronisation; telecommunication power management; wireless sensor networks; ELOTS; ERBS algorithm; RBS algorithm; WirelessHART Networks; energy consumption; energy efficient local optimization time synchronization algorithm; local clock adjustment; maximum a posteriori estimation; mean time offset; multiple reference messages; network overhead; reference broadcast synchronization algorithm; Complexity theory; Data models; Estimation; Real-time systems; Receivers; Synchronization; Energy efficient; Local optimization; Time Synchronization; WirelessHART;
Conference_Titel :
Systems Conference (SysCon), 2014 8th Annual IEEE
Conference_Location :
Ottawa, ON
Print_ISBN :
978-1-4799-2087-7
DOI :
10.1109/SysCon.2014.6819288
