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Physical conversion sensor networks (PhyC-SN) achieve simultaneous data collection in wireless sensor networks. Although the PhyC-SN can recognize the median and the outliers of all the sensing data simultaneously, their separation into each sensor data is a difficult task. To address this task, we have proposed a data separation method that utilizes multi-target tracking with use of the sensing data...
The goal of this paper is to construct an adaptive scheme that uses combinatorial keying for heterogeneous mobile wireless sensor nodes (ACKS-HWSN). Most of the previous work in security of WSN deals with homogeneous sensor nodes (SNs). In homogeneous WSNs, all sensors have similar resources (such as memory capacity, and battery life). Many techniques designed for these networks suffer from communication...
Protection of network is the most challenging issue for preventing the harmful types of attacks and poses security issue in WSN along with information security application domains. Some of the architectures and guidelines are proposed to protect Wireless Sensor networks (WSN) against different attacks done by intruders. WSN has large variety of applications that includes mass public, military and...
Wireless sensor network is one of the developing ranges of research in present situation. A Wireless sensor network comprises of geographically dispersed self-governing tiny sensor nodes with little battery life to screen and control over the physical parameters or ecological conditions, for example, temperature, sound, pressure, humidity and so on and this data is gone by the sensor nodes in the...
Clustering of nodes in Wireless Sensor Networks is a problem of concern for many researchers. The major challenge is to propose an algorithm which can optimize the values of various performance parameters like packet delivery ratio and network lifetime of a node in the network. This paper shows an implementation of firefly algorithm to perform clustering in wireless sensor networks. Simulation results...
The energy harvesting is the branch of the energy management, where the energy is being originated from the multiple sources. The energy harvesting is usually done from the sources such as wind mills, solar cells, piezoelectric and other similar power generation modules. In this paper, the energy harvesting methods are discussed for the wireless sensor networks. The wireless sensor networks are the...
An efficient framework of distributed compressive video coding using Enhanced side information for WSN is proposed. At the encoder, the incoming video frames are split into key frames and Wiener-Ziv (WZ) frames depending on Group of Picture (GOP). Based on Distributed Video Coding (DVC) these frames are processed independently and transmitted over WSN. Generally the WZ frames are encoded at a lower...
In wireless sensor networks, one of the most important application is tracking diffusive and large-scale phenomena, called continuous object. A number of sources from the large size of a continuous object bring huge communication overhead that former studies have to deal with. Meanwhile, recent application scenarios, such as forest fire suppression by firefighters, require sink mobility support. Most...
Radio coverage is helpful in estimation of Radio connectivity. Coverage problem is the main issue in the Wireless Sensor Networks. Hence the path loss model is used for the calculation of signal strength of each node to the base station. The values obtained for the path loss are used to plot a Cartesian graph with the base station as the origin and plotting other nodes as per their co-ordinate locations...
Optimal Placement of a certain number of sinks at appropriate locations in WSNs reduces the number of hops between a sensor and its sink. This reduction ensures less exchanged messages between nodes and consequently less energy consumption. Since finding the optimal number of the sinks and their locationsis an NP Hard problem, a meta-heuristic evolutionary approach has been adopted as a Sink Placement...
There are many applications for which location information plays a crucial role. Finding location information by a sensor node is called the localization problem. The major challenge is to determine the location of unknown nodes based on the known location of other nodes. In this paper, a range-free localization scheme based on fuzzy-logic approach has been proposed. The localization scheme uses the...
Wireless sensor network has emergence in various fields, so security is very important issue for sensor networks. Security comes from attacks. Due to the wireless and distributed nature anyone can connect with the network. Among all possible attacks, wormholes are very hard to detect because they can cause damage to the network without knowing the protocols used in the network. It is a powerful attack...
Wireless sensor networks are popular technologies that have extensive application areas. Localization is a crucial topic in wireless sensor networks. In wireless ad hoc and sensor networks, supporting nodes without Global Positioning System (GPS) capability have many applications in routing and surveying systems in use today. Time of Arrival (TOA) is a method used to estimate the location of a target...
The proliferation of RF networks coupled with the diverse and growing set of mobile devices, opened the doors for a new class of context awareness through contact-free ambient sensing. Since our initial challenges paper in 2007, the field of device-free passive sensing has witnessed an exponential growth; covering areas such as intrusion detection, mobile healthcare, whole-home gesture recognition,...
WSN have several inherent limitations. In several applications of WSNs each point in the field is required to be sensed by some sensors. A network of this type is called a sensing covered network. In random deployment, avoidance of holes (a region with no point within sensing range of nodes) is very difficult. We develop an efficient distributed technique to detect boundary nodes of a hole. We also...
Wireless sensor networks has become envisage for various purpose in all the fields of technology. Random deployments are a fundamental crisis to realize coverage and/or connectivity in sensor networks. Path-Trace-Back protocol is proposed proficiently to preserve the data at specific geographic area coverage in a network with node mobility in nature. This scheme can turn out to be more difficult for...
In WSN there is always a scope of improvement in efficient energy utilization, network lifetime. Efficient energy utilization always seems to be an important aspect in WSN's. Because of the fact that energy consumption directly effect the overall performance of WSN. Numbers of protocols are designed for enhancement of network lifetime and prevent the batteries from earlier drainage. Most of the protocols...
Cognitive Radio (CR) [4] has a capacity to dynamically utilize the unused spectrum because of the advances in electronics and government policies. Dynamic spectrum access (DSA) [9] is the technique to utilize the free spectrum and release the current spectrum if the original user (incumbents) arises on that spectrum within channel move time. This paper analyzed the DSA characteristics in IEEE 802...
Internet of things makes use of devices by setting up a connection for providing a means of communication. These devices include the sensor nodes of wireless sensor network. We need to aggregate the data of various sensor nodes for making decisions or analysis or controlling purpose. In this research paper, I am proposing a method call MHCDA for aggregating the data of wireless sensor network. For...
In this paper, we will focus on reference node placement technique in an indoor environment for two approaches based mainly on users distribution and random paths. Our objective is to reach 95% of radio coverage with minimal deployment cost for each approach. Proposed methods are: random path and density based method compared with the global method that considers all points in the region of interest...
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