Vijay Wadhai

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— In this paper, we are interested in optimizing the delay of event-driven wireless sensor networks, for which events does not occur frequently. In such systems, most of the energy is consumed when the radios are on, waiting for an arrival to occur. Sleep-wake scheduling is an effective mechanism to prolong the lifetime of this energy constrained wireless(More)
Wireless Sensor Networks (WSN) have become an very important technology for many applications such as the monitor and control of physical environment in Military, Industry and civilian areas, Home automation, Disaster monitoring and control, Target detection, Target tracking, Tactical systems and so on. Since power requirement of sensor nodes is depends on(More)
Less than a century since the automobile was made affordable enough for the general public, hundreds of millions of vehicles now travel along highways and streets around the world. Innovations in safety, comfort, and convenience have made vast improvements in automobiles during that time, and now new technologies promise to change the face of vehicular(More)
Now-a-days Wireless Sensor Networks plays predominant role in the communication domain. The data to be disseminated from multiple sources to the destination base station or sink is having vital significance. There are many problems with which data can be conveyed up to the sink. The congestion, reliability, delay, fairness, etc. are of main concern. These(More)
The patient-related data stored in the WBSN plays an important role in medical diagnosis and treatment; hence it is essential to ensure the security of these data. Access to patient-related data must be strictly limited only to authorized users; otherwise, the patient's privacy could be abused. There has been very little study done in encryption algorithms(More)
— Since last decade, the challenge and issues of Vehicular ad-hoc Network (VANET) have attracted the researchers from academia as well as industry for research towards the safety on road. Due to High velocity of vehicles on highway the major challenge is to maintain route information consistent and improvements in data packet delivery. In this paper we(More)
In this paper performance of AODV routing protocol is simulated and evaluated for highway scenario in WiMAX based VANET. In VANET the node mobility is dynamic and changes their topology frequently, have short period to forward the packets between each other. To overcome this problem WiMAX on VANET is configured and simulated to examine performance of(More)
The object tracking algorithms based on mean shift are good and efficient. But they have limitations like inaccuracy of target localization and sometimes complete tracking failure. These difficulties arises because of the fact that in basic kernel based mean shift tracking algorithm, the centroid is not always at the centre of the target and the size of(More)
Cognitive Radio has been receiving increasing attention in academic field, industry and government. Today's wireless networks are characterized by a fixed spectrum assignment policy. However, a large portion of the assigned spectrum is used sporadically and with geographical variations in the utilization of assigned spectrum ranges from 15% to 85% with a(More)
Cognitive radio (CR) technology is accepted as the most efficient method to improve the spectrum efficiency, which utilizes the available spectrum opportunistically in wireless communication networks. CR acts as a secondary (unlicensed) user to access the primary (licensed) user frequency bands when they are not being used, and release the frequency bands(More)