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Privacy is becoming one of the most notable challenges threatening wireless sensor networks (WSNs). Adversaries may use RF (radio frequency) localization techniques to perform hop-by-hop trace back to the source sensor’s location. A multiple k-hop clusters based routing strategy (MHCR) is proposed to preserve source-location privacy as well as enhance energy efficiency for WSNs. Owing to the inherent...
A distributed location detection problem in wireless sensor networks (WSNs) with M anchors and one node is considered in this paper. In the presence of the transmitting node at a known location, each anchor receives a noisy signal in the presence of node. In the absence of the node, the anchors receive only noise. Each anchor makes a decision as to whether the node is present or not by using a Neyman-Pearson...
Localization accuracy is crucial in sensor networks. A wireless sensor network (WSN) with M anchors and one node is considered in this paper. The estimation is based on time of arrival (TOA) in the presence of fading channels. The Cramer-Rao lower bound (CRLB) for localization error in the presence of fading is derived under different scenarios. Firstly, fading coefficients are considered as unknown...
The emergence of multi-core wireless sensor nodes brings a new opportunity to the popularity of wireless sensor networks. At the same time, there arises the question “How to effectively debug concurrent tasks on a multi-core wireless sensor node?” In this paper, based on the uClinux operating system, we design TMCD (Task-level Multi-Core Debugger), a remote task-level debugger to support embedded...
Medium Access Control (MAC) is an important technique that ensures the successful operation of WSN because it controls the radio's activity of sensor nodes, which consumes node's major energy. MAC protocols must be energy efficient in wireless sensor networks. In this paper, we study MAC protocols for WSNs, including schedule-based protocols such as TDMA and contention-based protocols such as S-MAC...
Topology control is one of the most important energy-saving techniques used in wireless sensor networks. It has evolved into two dominant research directions: power control and sleep scheduling. Although many topology control algorithms and protocols are claimed to be highly energy-efficient, this is not necessarily the case in real systems due to various isolated considerations. In this paper, based...
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