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Wireless sensor networks have received excessive attention in now a days. Research in all field in wireless sensor network (WSN) till now has assumed that sensors in network is homogeneous, means that all the nodes are same, especially for routing protocols that has used clustering like LEACH, LEACHC, and PEGASIS etc. But in the clustering algorithm where some nodes have to work as cluster heads,...
Multiple sensor nodes deployed in a common neighborhood to sense an event and subsequently transmit sensed information to a remote processing unit or base station, has been the recent focus of research. Tiny sensor nodes, which consist of sensing, data processing, and communicating components, leverage the idea of sensor networks based on collaborative effort of a large number of nodes. These numerous...
Ad hoc networks are non-infrastructure networks consisting of mobile nodes. Since the mobile nodes have limited battery power, it is very important to use energy efficiently in ad hoc networks. In order to maximize the lifetime of an ad hoc network, traffic should be sent via a route that can avoid nodes with low energy while minimizing the total transmission power. In addition, considering that the...
Wireless sensor networking is an emerging technology that has a wide range of potential applications. In this paper an efficient hybrid MAC layer protocol has been proposed, utilized ZigBee MAC (EZ-MAC), for sensor networks. Sensor networks have to manage variety of traffics such as real-time traffics and sensor traffics. Since most of real-time traffics are time-restricted, service access delay is...
Looking at the future of the wireless sensor networks and the applications which are likely to be deployed on it, the security is now becoming an evident feature. Lot many security architectures are proposed, but looking to the energy and memory constraints, the implementation still demands good amount of research. The simpler way seems is, to detect the intruder as early as possible and take the...
Node mobility is an important factor at the time of clustering in ad hoc network because it directly affects the stability of cluster. In the proposed work a distributed clustering algorithm which uses node mobility as a main concern with battery power and connectivity in terms of no. of neighbouring nodes for selecting cluster heads to achieve better stability is being introduced. The proposed node...
This paper explores the implementation approaches of a low power modified booth multiplier (MBM) with reduced spurious transition activity technique (RSTAT) for DSP functions that encounter a wide diversity of operating scenarios in battery powered wireless sensor network system. This RSTAT approach has been applied on both the compression tree of multipliers and the modified booth encoder to enlarge...
Broadcasting is used as a means of efficient and fast communication between an information-server to all the clients. Many broadcasting schemes have been proposed in the literature to achieve better performance in different communication scenario. In this paper, a new adaptive dynamic heuristic real-time multiple data-item broadcast-on-demand scheme is proposed. This proposed scheme (DHST-alpha,beta),...
Mobile Ad hoc Networks (MANETs), without any fixed infrastructures, allow mobile terminals to setup a temporary network for instant communication. Hence, MANETs promise to have many applications including disaster management, emergency relief, mobile conferencing, battle field communication, and so on. Clustering is an important approach in ad hoc networks for achieving scalability, ease of routing,...
Wireless sensor networks may be deployed in an environment the intrinsic pattern of data is unknown and may not be amenable to statistical aggregation techniques. Moreover, the dynamic nature of the environment may generate large amount data which may be highly similar with few data values that may be noisy or may indicate interesting observation. The present work proposes resonance based clustering...
In wireless sensor networks (WSN), nodes are randomly deployed. Most of all protocols in WSN are designed for its random deployment. Projective geometry can be used for the fixed-geometrical deployment of wireless sensor nodes. This strategy can be used for deploying nodes in smart houses, hotels, offices, underground mines etc. For environmental monitoring on large geographical area random deployment...
Sensing is one of the fundamental functions of wireless sensor networks. Sensor networks are designed to conduct monitoring of physical or environmental conditions, such as temperature, sound, vibration, pressure, motion, or pollutants, at different locations. Some sensor applications require each point in the region to be covered by multiple sensors (k-coverage) to ensure full Quality of service...
Wireless sensor networks require the design of highly energy-efficient and yet flexible sensor nodes. The hardware flexibility required for dynamic adaptation is traditionally achieved with software based processors or field programmable gate arrays (FPGAs), both of which come with significant energy, area and performance costs when compared to application-specific integrated circuits (ASICs). In...
Wireless sensor networks are shaping many activities in our society as they have become the epitome of pervasive technology. In Many Circumstances, it is useful or even necessary for a node in a wireless sensor network to be aware of its location in the physical world. For example tracking or event detection functions are not particularly useful if the WSN cannot provide any information where an event...
Centralized localization dissipates a lot of energy in pooling the proximity information of the individual nodes. In contrast a distributed algorithm usually uses only local information at each node. Most localization algorithms available in the literature are are anchor based or they estimate the position of the sensors at the cost of losing accuracy. In this paper, we propose an anchor-free length-based...
To increase the lifetime and scalability of a wireless sensor network (WSN) it is necessary to have control over topology of the network. Dynamic clustering is one way for achieve the above defined objective. In this paper we are proposing a multi-level hierarchal clustering approach for WSN. Our proposed approach in this paper is to create a system which will adopt a topology (i.e. size of cluster...
Wireless sensor networks enable scalable, self organizing, self-healing networks that can manage various data traffic patterns. They are fast gaining prominence in a multitude of applications including industrial communications and automation. This paper presents the research and development activities carried out within the virtual automation networks project towards realizing a wireless sensor network...
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