Low-Energy Sensor Network Time Synchronization as an Emergent Property

TL;DR

This paper investigates an energy-efficient pulse-coupled oscillation method for time synchronization in wireless sensor networks, demonstrating its robustness and efficiency compared to traditional timestamp broadcasting, especially under mobility conditions.

Contribution

It introduces a pulse-coupled oscillation approach that improves energy efficiency and robustness in sensor network synchronization, addressing interference issues and mobility impacts.

Findings

Pulse-coupled oscillation outperforms timestamp broadcast in energy efficiency.

The method remains robust under sensor mobility.

Integration with GPS can provide a master clock.

Abstract

The primary contribution of this work is to examine the energy efficiency of pulse coupled oscillation for time synchronization in a realistic wireless network environment and to explore the impact of mobility on convergence rate. Energy coupled oscillation is susceptible to interference; this approach uses reception and decoding of short packet bursts to eliminate this problem. The energy efficiency of a commonly used timestamp broadcast algorithm is compared and contrasted with pulse-coupled oscillation. The emergent pulse coupled oscillation technique shows greater energy efficiency as well as robustness with mobility. A proportion of the sensors may be integrated with GPS receivers in order to obtain a master clock time.