Digital Signal Processing Reference
In-Depth Information
1
Time
Synchronization
for Wireless
Sensor Networks
13.3 Fundamental Approaches to Time
Synchronization .................................................... 379
Synchronization
Kyoung-Lae Noh
Texas A&M University
Yik-Chung Wu
The University of Hong Kong
Khalid Qaraqe
Texas A&M University
Erchin Serpedin
Texas A&M University
13.1
Introduction
With the help of recent technological advances in micro-electro-mechanical systems
(MEMS) and wireless communications, low-cost, low-power, and multifunctional wire-
less sensing devices have been developed. When these devices are deployed over a wide
geographical region, they can collect information about the environment and efficiently
collaborate to process such information by forming a distributed communication net-
work, called the
wireless sensor network
(WSN). WSN is a special case of wireless ad
hoc network, and assumes a multihop communication framework with no common
infrastructure, where the sensors spontaneously cooperate to deliver information by
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