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The Internet of Things and the Web of Things have focused on context awareness as a central issue in defining complex autonomic systems that rely on various layers, including devices, communications and applications. The spread usage of mobile devices that allow users to generate and to access distributed data makes it extremely important to organize the forwarding and gathering of such data in a...
Wireless Multimedia Sensor Networks (WMSNs) have recently attracted more attention and have contributed to new potential wireless sensor network (WSN) applications such as border surveillance, battlefield monitoring, target detection, target tracking and habitat monitoring. WMSNs carry heterogeneous traffic with different urgency and quality of service (QoS) requirements. While the need to minimize...
Wireless Sensor Networks (WSN) and related technologies have the important impact nowadays. These technologies have variety of applications, and they are key enabling technologies of IoT (Internet of Things). ZigBee standard is the most common WSN technology. Its importance and expansion, as a widely used technology in many different areas, influence the importance of including ZigBee technology in...
Any common methodology for functionality research in the field of communication systems engineering is network simulation. There is always the overriding worry when utilizing simulation that the results may not reflect appropriate behavior. Therefore, it is important to recognize the particular strengths and also flaws of such simulators. There are a variety of network simulators, as an illustration,...
Wireless sensor networks (WSN) refers to a group of spatially dispersed and dedicated sensors which have limited resources, bandwidth and communication capabilities. WSN have many applications like environment monitoring, health monitoring, battlefield surveillance for military etc. Due to the resource constraint and less communication power secure communications is not possible. Many key management...
The advances in the telecommunication and computer sciences have led to the emerging of several new technologies and concepts for networking and for connecting people and devices. One of these new opportunities is the possibility to access and use computers and equipment remotely. This paradigm can be used for many different purposes - from education and research to management and business tasks....
Software defined wireless sensor network can be adapted to different application needs through dynamic programming. In this paper, we propose a signal acquisition and processing wireless sensor network (SAPSN). SAPSN consists of sampling nodes, processing nodes and remote controllers. At first, the sampling node completes the local signal sampling by analog-digital conversion. Next, according to the...
As sensor nodes are deployed in hostile or remote environment and unattended by human, they are prone to different kind of attacks. So adaptation of dynamic key is very important for secure key management, for encrypting messages for communication.
Vehicle speed monitoring and management of the associated data in an intelligent and efficient way is an important issue in modern transportation system in order to reduce road accidents. The aim of this work is to develop an automatic wireless system for monitoring vehicle speed on the road, identify a speeding vehicle and imposing penalty for the speeding offenders. In this work, a prototype system...
In RPL the pair wise metric may result in a single node with good transmission quality, linked to many neighboring nodes which are associated with a large number of children nodes. In this case, for one DODAG the parent node can be severely congested which results in a large number of packets drop due to buffer limitation on the parent node side. We propose an Adaptive Binary Exponential Backoff algorithm...
This paper proposes a WSN-based monitoring system for factory aquaculture, which is used to monitor the parameters of water quality. This system is composed of two parts, which are a wireless sensor network and an upper computer. The solution of this system is designed by using the wireless sensor network and ZigBee technologies. The hardware architectures of nodes and related circuits are designed...
LEACH algorithm as a classic clustering algorithm is widely used in wireless sensor networks, but not considers the number of cluster head, monitoring areas and other factors, and the network greatly huge consumption reduces the life cycle of the network. To this defects, on the basis of the optimal coverage theorem in Wang, a kind of CDE-LEACH algorithm is proposed, which pre-built data table to...
Wireless multimedia sensor networks constitute a powerful technology particularly suitable for environmental monitoring. With regard of fire detection and prevention in buildings, fire images acquired by WMSNs provide visual information of fire, which contributes to a more accurate recognition. This paper presents a design scheme of early fire detection system in buildings based on WMSNs. We adopt...
We present an innovative scheme for performing pattern recognition in wireless sensor networks. It is based on the concept of a distributed computer that can alter itself to adjust to the user's needs. By emulating the distributed nature of biological computational devices and evenly spreading the computational and communication workload throughout the network, we will reduce energy consumption and...
The main building block of Wireless Sensor Network (WSN) is sensor node consisted of four basic elements: the sensor unit, processing unit, communication and power units. In this paper we propose the Raspberry Pi, cheap, flexible, fully customizable and programmable small computer board and abilities of its usage as WSN node and SensorWeb node. The Raspberry Pi brings the advantages of a PC to the...
We consider the problem of deployment of cameras inside a complex indoor setting for surveillance applications. We formulate the problem of the minimum guarding network that places a minimum number of cameras satisfying both visual coverage of the domain and wireless network connectivity. We prove that finding the minimum guarding network in both the geometric setting and discrete setting is NP-hard...
In this paper we consider the problem of efficient data gathering in sensor networks for arbitrary sensor node deployments. The efficiency of the solution is measured by a number of criteria: total energy consumption, total transport capacity, latency and quality of the transmissions. We present a number of different constructions with various tradeoffs between aforementioned parameters. We provide...
Wireless sensor networks (WSNs) are generally used to monitor, in an area, certain phenomena which can be events or targets that users are interested. To extend the system lifetime, a widely used technique is ‘Energy-Efficient Coverage-Preserving Scheduling(EECPS)’, in which at any time, only part of the nodes are activated to fulfill the function. To determine which nodes should be activated at a...
Neighbor discovery is crucial for both wireless sensor networks and mobile computing applications. The crux of the problem is to achieve energy efficiency, which has been demonstrated to be difficult by prior work. In this paper we propose Hello, a generic flexible protocol for neighbor discovery. With an unrestricted parameter, it serves as a generic framework that incorporates existing deterministic...
For wireless networks, coverage with different restrictions that can capture the practical requirements have received great research interests. We will study several restricted coverage problems. The first problem is about K-coverage, i.e., how to deploy wireless nodes such that each target is covered by at least K wireless nodes. We study the problem restricted to linear-A"-coverage where there...
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