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In Wireless Sensor Networks, sensor nodes have limited resources such as processing power, memory and energy. Energy is an important factor to determine the lifetime of the network. Most part of the energy of a node is consumed in transmitting and receiving the data. Data transmission should be energy efficient to maximize the network's lifetime. Different architectures are used to transmit the data...
The wireless sensor networks (WSNs) are among most widely used technology that can change the future. Improvement in WSN has made to replace thousands of wires connected to medical devices used in hospitals and providing mobility and reliability. The lifetime of the sensor network is less because the sensor nodes run on batteries which must be efficiently utilized. Many protocols do not take route...
In this paper extension to LEACH protocol i.e. Modified LEACH protocol has been analytically and critically analyzed. It has been shown that the hard threshold value in Modified LEACH protocol has a direct impact on the network lifespan of a wireless sensor network. More the initial energy more will be the net lifetime of the network, as the number of alive nodes will be more. Simulation and analytical...
In a Wireless Sensor Network (WSN), significant amount of data flows through the nodes near the sink, than the nodes away from the sink. As a result, the limited energy available with the nodes around the sink becomes a bottleneck in the performance of the WSN. The nodes in the bottleneck zone determines the lifetime of the WSN. So, there is a need to investigate the effect of the size of the bottleneck...
Enhancement of Wireless Sensor Networks (WSNs) by improving the network performance has been researched in recent years. This paper presents the application of queuing theory to evaluate performance of WSNs using queuing network models. The analysis of performance parameters consider both kinds of data and routing packets. Moreover, the optimal values of parameters such as service rate and queue length...
Localisation defines the process of determining the topographical location of sensor nodes in wireless sensor network. Current localisation method is space oriented which adopts GPS (Global Positioning System) signal to yield the location information of the nodes. The GPS signals are suited for outdoor environments, however they fail to work indoors, which makes the need to opt for terrestrial localisation...
In typical settings for Wireless Sensor Networks (WSNs), a potentially large set of nodes operates under strict requirements concerning energy consumption and packet delivery success. If non-reliable or even malicious nodes participate, standard protocols can suffer in performance which may result in a limited functionality of the whole network. This paper addresses this issue by establishing end-to-end...
Railway transportation systems are gaining relevance in their adoption, driven by decreasing costs, higher interconnectivity options and timely operation. The Railway Transportation system is comprised by vehicular elements, as well as several infrastructure elements, which require constant interaction and communication, for tele-control and tele-command, signaling systems, passenger information and...
Directional Sensor Network (DSNs) being a subdivision of WSN has attracted researchers a lot due to its wide deployment in visual monitoring applications as the continuous technical advancements have enabled us making use of low-cost camera sensors. But because of the inherent random deployment of these camera sensors, the effective area coverage is reduced. Therefore, the effective area coverage...
In this paper, we discuss wireless sensor and networking technologies for swarms of inexpensive aquatic surface drones in the context of the HANCAD project. The goal is to enable the swarm to perform maritime tasks such as sea-border patrolling and environmental monitoring, while keeping the cost of each drone low. Communication between drones is essential for the success of the project. Preliminary...
Node locations and distance are important in networks. This article assumes sensor nodes are distributed randomly and studies the energy consumption in a single regular hexagon and two adjacent regular hexagon. Meanwhile, distance distribution function is verified and point average energy consumption function is derived and simulated by using Monte Carlo method. The simulation results show that distance...
Modern people are to spend a lot of time living and working in sedentary postures. But the maintenance of wrong posture causes a lot of strain on the body. So diseases of the musculoskeletal system causes. Wrong habits of sedentary posture are neck and spine, pelvis to influence. And initially it accompanied by simply discomfort or pain But wrong posture that has persisted for a long time can lead...
In the preceding works on the tree networks composed of binary symmetric channel (BSC), the path diversity effects are discussed in [8]–[10]. In [9], it is shown that the error probability of majority decision at the fusion center is almost constant regardless of network size. This constant property of error probability has not been discussed theoretically. In this paper, a new approach of signal-to-noise...
The need of monitoring the water level of troughs is increasing. This is parallel with the growing of Wireless Sensor Network and Internet of Thing. By combining both approach, cattlemen can monitoring their troughs ubiquitous using their own personal device. This paper develop such system by using LoRa™ as the media between sensor hub and nodes, while Raspberry Pi is used as the gateway to push data...
With WSN technologies becoming more reliable, sophisticated and more capable of meeting the demands of market opportunities and with its broad applications and new emerging trends like: internet of things and integrated web-based services, there still a need for developing protocols to manage and improve coherence and consolidation of the network. Video sensing can be involved in most of the WSN applications...
The evolution of digital communication era includes both devices and applications running on different platforms. Specifics applications are needed for a safeguard communication ensuring protection and trust services to the users. This paper presents an authentication and session-key establishment protocol that enabling mutual authentication procedure between involved entities in the WSNs. This scheme...
In this paper a new compression scheme has been formulated based on jointly delta modulation with biasing and Run Length Encoding technique for Direct Normalized Solar Irradiance data. The key features of this Compression Algorithm (Delta Modulation with Biasing and Run Length Encoding techniques viz. DMBRLE) are: it requires less memory as it belongs to direct compression method and its lossless...
Wireless sensor networks (WSN) provide attractive solutions for data exchange in a variety of applications from military surveillance to medical and environmental monitoring. The commonality in all such applications is that the data collected in some nodes of the network is needed at some other nodes, for instance in a data collector node. The nodes are typically limited in terms of power, memory,...
This paper evaluates the performance of min-max and trilateration methods for RSSI-based indoor localization by a real test. Our experiments have been carried out in a laboratory room in the Department of Electrical Engineering, Prince of Songkla University, Thailand. An LPC2103F microcontroller interfacing with a CC2500 radio transceiver which was developed by our research team is used as a wireless...
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