sapna kulkarni - Academia.edu (original) (raw)

Papers by sapna kulkarni

A mobile ad hoc network (MANET) is a collection of mobile wireless nodes that can dynamically for... more A mobile ad hoc network (MANET) is a collection of mobile wireless nodes that can dynamically form a network without using any pre-existing infrastructure. Due to characteristics such as temporary topology and absence of centralized authority, routing is one of the major issues in ad hoc networks. In mobile ad hoc networks, during real-time traffic multicasting there is increased energy consumption and delay. MANETs are highly dynamic because of frequent node movements, therefore network connectivity has to be maintained during multicast routing. To improve the QoS (quality of service) metrics including delay and bandwidth, the residual energy and available bandwidth have to be estimated accurately. Our objective is to reduce and balance the useful energy consumption for multicast algorithms maintaining good connectivity among all participating mobile nodes, and to maximize the lifetime of the networks. In order to overcome this issue, in this paper we propose to design an energy an...

International Journal of Research Publication and Reviews

Initially, the platform must be constructed in accordance with the data format associated with fa... more Initially, the platform must be constructed in accordance with the data format associated with false and authentic news. The implemented programmes must be synchronised with the data structure during the design phase. The bogus database displays no news channel names, but the genuine dataset displays individual headquarters for each station. Manipulating the concept of dataset fraudulent channels are exploiting an unregistered news portal. As a result, using the original dataset, one may compare and explicitly identify them.

Mobile ad hoc network is a self-configuring, self organizing and decentralized network. It is con... more Mobile ad hoc network is a self-configuring, self organizing and decentralized network. It is connected by wireless links. Each device in a MANET is free to move independently in any direction. Hence it can change its links to other devices frequently. It is a collection of mobile wireless nodes that can dynamically form a network without using any pre-existing infrastructure. Due to characteristics like temporary topology and absence of centralized authority, routing is one of the major issues in ad hoc networks. Because of connectivity richness in mobile ad hoc networks, there often exist multiple paths between a source and a destination. Since many applications require uninterrupted connectivity of a session, the ability to find long-living paths can be very useful. However, MANETs does not seem to effectively support live video transmission and multimedia applications. The main objective of our work is to improve the performance. . In mobile ad hoc networks (MANET), during real ...

IOSR Journal of Computer Engineering

Mobile ad-hoc networks are a specific kind of wireless networks that can be quickly deployed with... more Mobile ad-hoc networks are a specific kind of wireless networks that can be quickly deployed without pre-existing infrastructures. Even though there are various studies on cluster based security in MANET but there is a clear absence of a comprehensive performance study that provides a unified platform for comparing such techniques. Thus in order to provide a better understanding of cluster based security in MANET a brief survey is needed. Hence to the point, outline of the key concept, performance metrics used, as well as the advantages and drawbacks of each discussed mechanism are given. Finally, the comparison table is constructed to show the cluster based security in MANET with method performance metrics, advantages and disadvantages based on trust based security and authentication based security.

IJARCCE

Wearable and mobile devices are widely used for crowdsensing, as they come with many sensors and ... more Wearable and mobile devices are widely used for crowdsensing, as they come with many sensors and are carried everywhere. Among the sensing data, videos annotated with temporal-spatial metadata contain huge amount of information, but consume too much precious storage space. In this paper, we solve the problem of optimizing cloudbased video crowdsensing in three steps. First, we study the optimal transcoding problem on wearable and mobile cameras. We propose an algorithm to optimally select the coding parameters to fit more videos at higher quality on wearable and mobile cameras. Second, we empirically investigate the throughput of different file transfer protocols from wearable and mobile devices to cloud servers. We propose a real-time algorithm to select the best protocol under diverse network conditions, so as to leverage the intermittent WiFi access. Last, we look into the performance of cloud databases for sensor-annotated videos, and implement a practical algorithm to search videos overlapping with a target geographical region. Our measurement study on three popular opensource cloud databases reveals their pros and cons. The three proposed algorithms are evaluated via extensive simulations and experiments. The evaluation results show the practicality and efficiency of our algorithms and system. For example, our proposed transcoding algorithm outperforms existing approaches by 12 dB in video quality, 87% in energy saving, and one-quarter in delivery delay. Another example is, by intelligently choosing a proper cloud database; our system may reduce the insertion time by up to one-third, or the lookup time by up to one-fourth.

2015 IEEE International Advance Computing Conference (IACC), 2015

A mobile ad hoc network (MANET) is a collection of mobile wireless nodes that can dynamically for... more A mobile ad hoc network (MANET) is a collection of mobile wireless nodes that can dynamically form a network without using any pre-existing infrastructure. Due to characteristics such as temporary topology and absence of centralized authority, routing is one of the major issues in ad hoc networks. In mobile ad hoc networks, during real-time traffic multicasting there is increased energy consumption and delay. MANETs are highly dynamic because of frequent node movements, therefore network connectivity has to be maintained during multicast routing. To improve the QoS (quality of service) metrics including delay and bandwidth, the residual energy and available bandwidth have to be estimated accurately. Our objective is to reduce and balance the useful energy consumption for multicast algorithms maintaining good connectivity among all participating mobile nodes, and to maximize the lifetime of the networks. In order to overcome this issue, in this paper we propose to design an energy an...

International Journal of Research Publication and Reviews

Initially, the platform must be constructed in accordance with the data format associated with fa... more Initially, the platform must be constructed in accordance with the data format associated with false and authentic news. The implemented programmes must be synchronised with the data structure during the design phase. The bogus database displays no news channel names, but the genuine dataset displays individual headquarters for each station. Manipulating the concept of dataset fraudulent channels are exploiting an unregistered news portal. As a result, using the original dataset, one may compare and explicitly identify them.

Mobile ad hoc network is a self-configuring, self organizing and decentralized network. It is con... more Mobile ad hoc network is a self-configuring, self organizing and decentralized network. It is connected by wireless links. Each device in a MANET is free to move independently in any direction. Hence it can change its links to other devices frequently. It is a collection of mobile wireless nodes that can dynamically form a network without using any pre-existing infrastructure. Due to characteristics like temporary topology and absence of centralized authority, routing is one of the major issues in ad hoc networks. Because of connectivity richness in mobile ad hoc networks, there often exist multiple paths between a source and a destination. Since many applications require uninterrupted connectivity of a session, the ability to find long-living paths can be very useful. However, MANETs does not seem to effectively support live video transmission and multimedia applications. The main objective of our work is to improve the performance. . In mobile ad hoc networks (MANET), during real ...

IOSR Journal of Computer Engineering

Mobile ad-hoc networks are a specific kind of wireless networks that can be quickly deployed with... more Mobile ad-hoc networks are a specific kind of wireless networks that can be quickly deployed without pre-existing infrastructures. Even though there are various studies on cluster based security in MANET but there is a clear absence of a comprehensive performance study that provides a unified platform for comparing such techniques. Thus in order to provide a better understanding of cluster based security in MANET a brief survey is needed. Hence to the point, outline of the key concept, performance metrics used, as well as the advantages and drawbacks of each discussed mechanism are given. Finally, the comparison table is constructed to show the cluster based security in MANET with method performance metrics, advantages and disadvantages based on trust based security and authentication based security.

IJARCCE

Wearable and mobile devices are widely used for crowdsensing, as they come with many sensors and ... more Wearable and mobile devices are widely used for crowdsensing, as they come with many sensors and are carried everywhere. Among the sensing data, videos annotated with temporal-spatial metadata contain huge amount of information, but consume too much precious storage space. In this paper, we solve the problem of optimizing cloudbased video crowdsensing in three steps. First, we study the optimal transcoding problem on wearable and mobile cameras. We propose an algorithm to optimally select the coding parameters to fit more videos at higher quality on wearable and mobile cameras. Second, we empirically investigate the throughput of different file transfer protocols from wearable and mobile devices to cloud servers. We propose a real-time algorithm to select the best protocol under diverse network conditions, so as to leverage the intermittent WiFi access. Last, we look into the performance of cloud databases for sensor-annotated videos, and implement a practical algorithm to search videos overlapping with a target geographical region. Our measurement study on three popular opensource cloud databases reveals their pros and cons. The three proposed algorithms are evaluated via extensive simulations and experiments. The evaluation results show the practicality and efficiency of our algorithms and system. For example, our proposed transcoding algorithm outperforms existing approaches by 12 dB in video quality, 87% in energy saving, and one-quarter in delivery delay. Another example is, by intelligently choosing a proper cloud database; our system may reduce the insertion time by up to one-third, or the lookup time by up to one-fourth.

2015 IEEE International Advance Computing Conference (IACC), 2015