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The received signal strength indicator (RSSI) and the link quality indicator (LQI) are metrics that are commonly available in commercial off-the-shelf (COTS) sensor hardware. The former has been widely regarded as a cheap alternative for distance estimation and node localization. However, experimentally RSSI has been shown to behave in an inconsistent manner, even in ideal scenarios, and serve at...
The general feeling about ecology is changing worldwide. People all around the world are more careful about problems such as energy provisioning and consumption. New ideas, such as the Smart Grid concept, are trying to give solutions to the energy problems by means of a modern power grid with intelligent management capabilities. In such scenarios, networking solutions, e.g., the Internet Protocol...
In Wireless Sensor Networks (WSNs), controlling transmission power is a commonly used technique to extend battery life. This paper describes a novel mechanism using measured RSS (Received Signal Strength) to calculate optimal transmission power. This technique works in multipath environments and with nodes with differing transmission capability. Our technique achieves automatic configuration employing...
A wireless sensor network (WSN) is a collection of tiny and limited-capability sensor nodes that report their sensed data to a data collector, referred to as a sink node. WSNs are used in many applications, but are challenged by memory and energy constraints. To address these issues, solutions have been proposed on different levels including the topological level where multiple sinks can be used in...
This paper briefly discusses cyper-physical systems that include human beings and vehicles in a built environment such as a building or a city, together with Sensor Networks, Communications and Decision Support Systems, with the purpose of optimising the human outcome in the case of an emergency.
Wireless sensor networks have been widely applied to various application domains such as environmental monitoring and surveillance. Because of reliance on the open transmission media, a sensor network may suffer from radio jamming attacks, which is easy to launch but difficult to defend. Attacked by jamming signals, a sensor network may experience corrupted packets and low network throughput. A number...
We investigate the area coverage and connectivity of an autonomous, unmanned aerial vehicle (UAV) network, whose goal is to monitor and sense a given area of interest in an efficient manner. To this end, we propose a connectivity-based mobility model that aims to sustain connectivity between the UAVs and the ground station. We compare coverage and connectivity performance of the proposed scheme with...
The main goal in wireless sensor networking remains the reduction of the network lifecycle and the enhancement of its reliability, keeping decent performances in terms of throughput and latency. Given the increasing interest of the research community on wireless network coding (NC), we think such challenges can be tackled using its innovative concepts, especially in the case of many-to-one communications...
MAP is a connectivity-based routing protocol aimed at improving the load balance performance of traditional geographical routing methods. It attempts to find parallel routing paths by taking advantage of the concept of skeleton in the continuous domain. However, MAP suffers seriously from overloading the sensor nodes that are close to the skeleton. In this paper, we propose a contour-based routing...
In this paper1, we present the architecture, design, and simulation of an intelligent system for Temperature Monitoring used in metropolitan heating. The system consists of several TelosB-compatible motes, a Nokia uSDCard, and a smart phone. We use TelosB Motes to collect temperature data, and to transport the data to the smart phone. The uSDCard, as the middle layer, connects the smart phone with...
We consider the scenario of a Wireless Sensor Networks (WSN) where the nodes are equipped with a programmable middleware that allows for quickly deploying different applications running on top of it so as to follow the changing ambient needs. We then address the problem of finding the optimal deployment of the target applications in terms of network lifetime. We approach the problem considering every...
Cost function based routing has been widely studied in wireless sensor networks for energy efficiency and network lifetime elongation. Existing algorithms however have limited effects because they adopt a single cost function that does not fully capture nodal energy consumption situation. In this paper, we propose a novel Double Cost Function based Routing (DCFR) algorithm, which takes into account...
An increased bandwidth demand and the problem of interference have resulted in the advent of multi-channel protocols for Wireless Sensor Networks. In this paper, we propose a distributed contention-free multi-channel access scheme. This scheme is based on the parallel rendez-vous principle, which exploits the possibility of concurrent transmissions on different channels in the same collision domain...
A base station (BS) is the controller and the data receiving center of a wireless sensor network. Hence, a reliable and secure BS is critical to the network. Once an attacker locates the BS, he can do a lot of damages to the network. In this paper, we study the BS location protection issue. First, we present a new attack on BS: the Parent-based Attack Scheme (PAS). The PAS can locate a BS within one...
This paper introduces a light-weight packet delivery approach called Packet-based Cooperative Diversity to improve the reliability of Wireless Sensor Networks (WSNs). Our approach is based on the principle of cooperative diversity and fail-over concepts of Redundant Array of Independent Disks (RAID), by grouping, gathering, and rejecting redundant packets with the unique packet ID per message. It...
Data gathering is one basic functional operation provided by wireless sensor networks. Most existing clustering protocols suffer from unbalanced energy consumption among nodes, which shortens the lifetime of the network and limits their application in many fields. In this paper, an energy-balanced dominating set based clustering scheme (EBDSC) is proposed to prolong the network lifetime by balancing...
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