On Energy-Efficient Time Synchronization for Wireless Sensors under Large-Scale and Small-Scale Fading Effects

• 作者: Ariel Lutenberg Fabian Vargas Leonardo Rey Vega Pablo Briff
• 来源期刊: 无线传感网络(英文)
• 学科: 工学
• 关键词: WIRELESS Sensor Networks CLOCK OFFSET Estimation Time Synchronization WIRELESS Channel FADING
• 年，卷（期）: 2013,（10）
• 页码范围: 181-193
• 页数: 13页
• 分类号: TN92

摘要

In this work, the existing trade-off between time synchronization quality and energy is studied for both large-scale and small-scale fading wireless channels. We analyze the clock offset estimation problem using one-way, two-way and N-way message exchange mechanisms affected by Gaussian and exponentially distributed impairments. Our main contribution is a general relationship between the total energy required for synchronizing a wireless sensor network and the clock offset estimation error by means of the transmit power, number of transmitted messages and average message delay, deriving the energy optimal lower bound as a function of the time synchronization quality and the number of hops in a multi-hop network.