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Energy-efficient operation is one of the prominent challenges for successful deployment of Wireless Sensor Networks (WSNs) along with maintaining certain quality of service (QoS) requirements. In this paper, we tackle the energy-efficient operation of WSN nodes implementation based on the Contiki real-time operating system (RTOS). We review the effect of applying spatial configuration for the radio...
The aim of this project is to define Vampire attacks, a new class of resource consumption attacks that use distance vector routing protocols to permanently disable ad hoc wireless sensor networks by depleting nodes' battery power. A node is permanently disabled once its battery power is exhausted; let us briefly consider nodes that recharge their batteries in the field, using either continuous charging...
Underwater Wireless Sensor Network (UWSN) environments have some very specific characteristics which introduce many challenges. Due to lack of sunlight as well as harsh conditions of underwater environment it is very difficult to change batteries and maintain power supply in underwater sensor nodes while in terrestrial WSN, managing power is easy due to ease of changing batteries and even a node can...
Energy harvesting has been steadily gaining interest in the wireless sensor network community. Instead of minimizing the energy consumption and maximizing a network’s operational time, the main challenge in energy harvesting sensor networks is to maximize the utility of the application subject to the harvested energy. One major challenge is to maximize the data delivery rates by exploiting the spatial...
A sensor in wireless sensor networks (WSNs) periodically produces data as it monitors its vicinity. The basic operation in such a network is the systematic gathering (with or without in-network aggregation) and transmitting of sensed data to a base station for further processing. A key challenging question in WSNs is to schedule nodes' activities to reduce energy consumption. In this paper, we focus...
In this paper we propose a routing backbone construction mechanism that exploits and uses the synchronization messages exchanged by synchronized contention-based MAC protocols. Due to the usage of synchronization messages no additional control traffic is required to setup the routing backbone. Every node running a synchronized contention-based MAC protocol follows a given listen/sleep cycle. Because...
Prolonging network lifetime while efficiently detecting and reporting events are arguably the most important objectives of wireless sensor networks (WSNs). Different WSN protocols aim to improve such measures, yet partially focus on certain aspects (eg. reliability and time latency) and sacrifice others (eg. power efficiency) in application specific approaches. We present DMULD (decentralized multi-level...
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