Bandwidth Estimation in Network Probing Techniques Utilizing Min-Plus Algebraic Methods
Diagnosis of Anemia using Non-Invasive Anemia Detector through Parametrical Analysis
The Effectiveness of Jaya Optimization for Energy Aware Cluster Based Routing in Wireless Sensor Networks
Stress Analysis and Detection from Wearable Devices
Intrusion-Tolerant Sink Configuration: A Key to Prolonged Lifetime in Wireless Sensor Networks
Channel Estimation and It’s Techniques: A Survey
Impact of Mobility on Power Consumption in RPL
Implementation of Traffic Engineering Technique in MPLS Network using RSVP
FER Performance Analysis of Adaptive MIMO with OSTBC for Wireless Communication by QPSK Modulation Technique
Performance Evaluation of Advanced Congestion Control Mechanisms for COAP
DGS Based MIMO Microstrip Antenna for Wireless Applications
A Review on Optimized FFT/IFFT Architectures for OFDM Systems
Balanced Unequal Clustering AlgorithmFor Wireless Sensor Network
HHT and DWT Based MIMO-OFDM for Various ModulationSchemes: A Comparative Approach
Study and Comparison of Distributed Energy Efficient Clustering Protocols in Wireless Sensor Network: A Review
Diagnosis of Anemia using Non-Invasive Anemia Detector through Parametrical Analysis
In recent years, a new wave of network labeled Wireless Sensor Networks (WSNs) has attracted a lot of attention from researchers in both academic and industrial communities. WSNs consist of tiny, energy efficient sensor nodes communicating via wireless channels, performing distributed sensing and collaborative tasks for a variety of monitoring applications. They include physical phenomena like temperature, humidity, vibrations, seismic events and pollution detection, to feature extractions. An energy source supplies the energy needed by the device to achieve the programmed assignment. This energy source often consists of a battery with a limited energy plan. It could be unfeasible or difficult to recharge the battery, because nodes may be deployed in a hostile or unpractical environment. The sensor network should have a life span long enough to fulfill the application requirements. Therefore, the crucial issue is to prolong the network lifetime. In some cases, it is possible to scavenge energy from the external environment (e. g. by using solar cells as the energy source). However, external energy supply sources regularly exhibit a non-continuous performance so that an energy buffer (a battery) is needed, as well. In any case, energy is a very significant resource and must be used very sparingly. Therefore, the main issues in wireless sensor networks is how to prolong the network lifetime of WSNs with a certain energy source and how to maintain coverage and connectivity. Optimizing the energy consumption in wireless sensor networks has recently become an important concern. Hence, energy management is a key issue in Wireless Sensor Networks.
In future, the smart grid power transmission could be the most usable system for power transmission, however it also introduces many security problems. To overcome the security problem, the authors have used an encryption scheme which is introduced by an information network in the communication medium. In this paper, the information network can be integrated into the smart grid power transmission. In between the two systems of communication, the previous packets can be taken as re-transmission sequences. Here the re-transmitted packet is marked as “1” and the non retransmitted packet can be marked as “0”. At the time of communication, the re-transmission sequences can be generated at both sides to update the encryption key. In this paper, the smart grid is built by using ZigBee protocol for wireless communication of the information network. The encryption system is designed based on this platform. The result shows that the re-transmission and packet loss can be very low and it is impossible for the attacker to track the updation of the encryption key.
A Network which has wireless sensor nodes animatedly form a communication-less network or provisional network without using existing network infrastructure, which is defined as wireless network [1]. The sensing of information in decisive conditions during the emergency state where the sensor network is deployed is its main importance. The benefit of developing sensor network is increasing for practical information in physical environment in different applications either manually or randomly [2]. In this paper, the authors have implemented and evaluated the performance of LEACH protocol with different network parameters on different topologies based on varying the pause time and keeping the speed constant (node speed), which is small (1000 m. x 1000 m.), large (2000 m. x 1000 m.) and very large (2000 m. x 2000 m.) Important parameters are Packet Delivery Fraction, Average, End to End Delay, Average Throughput, and NRL and Packet loss. Wireless Sensor Network (WSN) consist of independent sensors, communicating with each other to monitor the environment. Sensor nodes are usually attached to microcontroller and are powered by battery. The resource constrained nature of WSN implies various challenges in its design and operations, which degrades its performance. However, the major fact that sensor nodes run out of energy quickly, has been an issue. Many routing, power management, and data dissemination protocols have been specifically designed for WSNs, while energy consumption is an essential design issue, which preserves longevity of the network. Out of these, clustering algorithms have gained more importance, in increasing the life time of the WSN, because of their approach in cluster head selection and data aggregation. This paper elaborately compares essential routing protocols using MATLAB and NS2 tools for several chosen scenarios. The paper concludes by mentioning valuable observations made from the analysis of results about several imperative protocols.
In Ad hoc networks, nodes are trusted implicitly based on cooperation between the entities involved in routing operations. As wireless range of nodes are limited, the nodes cooperate with their neighbors in order to extend the entire size of the network. The explicit trust management allows entities to reason with and about trust and to take decisions regarding other entities. In the proposed work, trust is taken as a security solution for AODV protocol, which fits particularly with characteristics of ad hoc networks. Here implicit trust for the AODV protocol has been analyzed using trust specification language and how a trust based reasoning can allow each node to evaluate the behavior of the other nodes, is shown. During route discovery, a node with more trust is selected, based on a router based parameter called 'Trust value'. Route request from the source is accepted by a node only if its trust value is high. Otherwise, the route request is discarded. This approach forms a reliable route from source to destination. The prevention and counter measures have been proposed to resolve the inconsistency for the misbehaving nodes.
A microstrip line-fed compact Ultra Wideband (UWB) microstrip antenna is proposed for ultra wideband applications. The proposed antenna uses a method to minimize the monopole antenna by using extended ground on the same side of the patch. The ground is extended vertically around the patch. The antenna covers the frequency band from 2.98 to 12.41 GHz with 122% impedance bandwidth which contains a full band of ultra wide band (3.1-10.6 GHz). The antenna is simulated using HFSS v13 and various results are discussed.