TABLE OF CONTENTS Fei Hu and Ramesh Vaithiyam Krishnaram
Department of Computer Engineering
Rochester Institute of Technology, Rochester, NY, USA
E-mail: fei.hu@rit.edu ; vkramesh@gmail.com
Sunil Kumar
Department of Electrical and Computer Engineering
San Diego State University, San Diego, CA, USA
E-mail: skumar@mail.sdsu.edu
In this chapter, we will analyze the time synchronization protocols in wireless sensor networks. Especially, we will discuss the potential network attacks in the time synchronization protocols, and some efficient countermeasures.
In recent years tremendous technological advances have led to the development of low-cost sensors capable of data processing using wireless packet communication. These sensor nodes are organized in a network typically called as Wireless Sensor Network (WSN) and are deployed in real world applications such as monitoring of the environment and surroundings (see Fig. 1). The idea behind such a network is very simple data (e.g., temperature, humidity and speed) collected by each sensor node is sent to a common base station (BS), also known as sink . The information received from various sensor nodes is aggregated (i.e., data fusion1) at the sink to analyze the situation. The mobility and easy deployment of the sensor nodes allows them to operate in a variety of inaccessible, hostile and dangerous environments. For example, WSNs are used in commercial & industrial applications to monitor data that would be difficult...
