Energy efficiency is one of the most important criteria in the design of a wireless sensor network. Sensor nodes are usually batterypowered and thus have very limited lifetime. In this paper, we introduce a novel passive wake-up radio device named WISP-Mote that uses a passive RFID tag as a wake-up receiver for a traditional sensor node. We characterize the WISP-Mote with field tests in differe...

A number of studies have been conducted on structural health monitoring for buildings and civil engineering structures in recent years (Spencer et al. 2002, Spencer 2003, Dyke et al. 2000, Fujino & Abe 2002, Iwan 2002, Mita & Takahira 2002). In addition, the interest in sensing technology for various uses has been growing, and new kinds of sensors have been developed by micro electro mechanical...

In this work, we focus on the problem of object location and recognition by an autonomous mobile robot. In our approach, the robot does not have any prior knowledge about the form and multiplicity of the objects. The robot, however, is equipped with an onboard camera and both objects and robot are capable of exchanging data by using a common low-cost, low-rate wireless technology, namely a Tmot...

We present BoostMAC, a CSMA-based MAC layer protocol for wireless sensor networks that provides an adjustable interface to achieve ultra-low power operation. To reach low power operation, we adaptively set two radio parameters. First, BoostMAC implements a preamble sampling scheme that allows a mote to dynamically set the length of its duty cycles. Second, we apply machine learning such that a ...

Wireless Sensor Network is widely used in Military Applications like Tracking the enemy movements and force protection. Security is the major concern and very difficult to achieve due to the unattended nature, limited memory, and limited power of network. This paper is mainly intended to describe the implementation of the secure unmanned Vehicle Navigation system controlled by wireless sensor n...

Localization is a fundamental problem in wireless sensor networks. In many applications, sensor location information is critical for data processing and understanding. While the global positioning system (GPS) can be used to determine mote locations, the high cost often prohibits the ubiquitous use of GPS for location estimates. The cost of GPS has motivated researchers to develop localization ...

Wireless sensor networks (WSNs) create a new frontier in collecting and processing data from remote locations. The IEEE 802.15.4 wireless personal area network-low rate (WPAN-LR) WSNs rely on hardware simplicity to make sensor field deployments both affordable and long-lasting without maintenance support. WSN designers strive to extend network lifetimes while meeting application-specific throug...

As many radio chips used in today’s sensor mote hardware can work at different frequencies, several multi-channel communication protocols have recently been proposed to improve network throughput and reduce packet loss for wireless sensor networks. However, existing work cannot utilize multiple channels to provide explicit guarantees for application-specified end-to-end communication delays, wh...