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Recently emerging wireless sensor technologies integrate different types of sensor nodes in a network for information collection. The heterogeneous Wireless Sensor Network (WSN) imposes complex design challenges as nodes in such a network often have different requirements in terms of latency and bandwidth. Therefore, the channel access for nodes needs to be managed ensuring differentiated quality...
A large number of WSN applications with bursty traffic have emerged in the recent past such as rare event detection and forest fire monitoring. Bursty traffic in Wireless Sensor Networks (WSNs) offers various challenges in terms of reliability and latency. Unlike periodic monitoring, energy consumption is far more challenging to deal with in WSN applications with bursty traffic due to long periods...
The tremendously increasing number of WSN applications calls for the efficient management of energy which is often achieved through developing the energy efficient MAC protocols. Polling based MAC protocols were introduced to achieve energy efficiency by making the nodes independently waking up and checking the channel activity. Dynamic polling is relatively a recent technique deployed in a number...
Identifying influence of users in a Twitter network has been researched from quite some time. Many researchers have proposed different models for calculating influence of a particular user in a Twitter network. The motivation has been to target such users for digital marketing or to solicit users who might be performing terrorist activities. The static influence of user has been captured through topology...
Data aggregation has been an important mechanism for achieving energy efflciency in WSN's. The aggregation reduces the transmission of redundant data which results in improved energy usage. A large number of data aggregation protocols have been developed in the past based on various techniques of optimizing the delay and energy. This paper surveyed the most prominent data aggregation protocols recently...
Stochastic techniques have been widely employed to improve the quality of noisy images. This research paper analyzes the dispersion parameter of the Fokker Plank equation (Kolmogorov Forward equation), which forms the bases to build a transition probability matrix. The empirical results depict that besides being dependent on an image this parameter also depends on the type of noise. Processing time...
Delay is one of the most important parameters of interest while providing QOS guarantees for Wireless Sensor Networks (WSN). Various MAC layer protocols for WSN have been proposed for efficient management of delay. Analyzing single hop and end to end delay using queuing analysis can provide significant help in modeling various real time WSN applications. This paper parameterizes the cross-layer analysis...
Energy management is one of the main r e s ear ch issues associated with Wireless Sensor network. An optimum means of preserving energy must always be deployed. Energy management in networks is also considered as one of the most crucial topics in the development of green networks. In this paper, we propose a modified duty-cycle based MAC protocol named as ES-MAC (Energy Efficient Sensor MAC). It involves...
Fault tolerance is a key element for reliable data delivery in practical applications of wireless sensor networks (WSNs). Sensor node failure can be caused by many reasons including environmental effects, transmission link instability, failure of hardware component and battery drainage. Fault tolerance is of particular interest in multi-tier heterogeneous networks where relay nodes are used to transport...
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