Browsing by Author "Varaprasad, G."
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Item Digital signature-based secure node disjoint multipath routing protocol for wireless sensor networks(2012) Shiva Murthy, G.; D'Souza, R.J.; Varaprasad, G.The objective of energy efficient routing protocol is to increase the operational lifetime of the wireless sensor networks. Multipath routing protocols enhance the lifetime of the wireless sensor networks by distributing traffic among multiple paths instead of a single optimal path. Transmission of secured data is also an important research concern in the wireless sensor networks. In this paper, a secure node disjoint multipath routing protocol for wireless sensor networks is proposed. Here, the data packets are transmitted in a secure manner by using the digital signature crypto system. It is compared with an ad hoc on-demand multipath distance vector routing protocol. It shows better results in terms of packet delivery fraction, energy consumption, and end-to-end delay compared to the ad hoc on-demand multipath distance vector routing. © 2012 IEEE.Item Energy efficient node-disjoint multipath route discovery mechanism for wireless sensor networks(2011) Shiva, Murthy, G.; D'Souza, R.J.; Varaprasad, G.To increase the operational lifetime of the wireless sensor network is the major objective of energy efficient routing protocols. Mutlipath routing protocols enhance the lifetime of the wireless sensor network by distributing the traffic among multiple paths instead of single optimal path. This Work proposes a low control overhead route discovery mechanism for Energy Efficient Node-disjoint Multipath Routing Protocol. The number of control messages used in the route construction is minimized. The energy spent on the route discovery mechanism is also minimized. � 2011 Springer-Verlag.Item Energy efficient node-disjoint multipath route discovery mechanism for wireless sensor networks(2011) Shiva Murthy, G.; D'Souza, R.J.; Varaprasad, G.To increase the operational lifetime of the wireless sensor network is the major objective of energy efficient routing protocols. Mutlipath routing protocols enhance the lifetime of the wireless sensor network by distributing the traffic among multiple paths instead of single optimal path. This Work proposes a low control overhead route discovery mechanism for Energy Efficient Node-disjoint Multipath Routing Protocol. The number of control messages used in the route construction is minimized. The energy spent on the route discovery mechanism is also minimized. © 2011 Springer-Verlag.Item Evolution of community based routing in Delay Tolerant Networks(2010) D'Souza, R.J.; Varaprasad, G.; Jose, J.; Manoj, R.A Delay Tolerant Network (DTN) is a subset of Mobile Ad Hoc Networks (MANET), where contemporaneous connectivity among all nodes doesn't exist. Making appropriate routing decision in such networks is a challenge. Researchers have addressed this issue for over a decade and have come out with several algorithms. The latest trend in this field is to utilize the power of handheld devices for transferring messages in a delay tolerant fashion. The goal of this work is to survey the evolution of various routing protocols in a DTN. � 2010 IADIS.Item Evolution of community based routing in Delay Tolerant Networks(2010) D'Souza, R.J.; Varaprasad, G.; Jose, J.; Manoj, R.A Delay Tolerant Network (DTN) is a subset of Mobile Ad Hoc Networks (MANET), where contemporaneous connectivity among all nodes doesn't exist. Making appropriate routing decision in such networks is a challenge. Researchers have addressed this issue for over a decade and have come out with several algorithms. The latest trend in this field is to utilize the power of handheld devices for transferring messages in a delay tolerant fashion. The goal of this work is to survey the evolution of various routing protocols in a DTN. © 2010 IADIS.Item Network lifetime analytical model for node-disjoint multipath routing in wireless sensor networks(Inderscience Publishers, 2013) Murthy, S.G.; D'Souza, R.J.; Varaprasad, G.The objective of every sensor node in a sensor network is to send the sensed data in the phenomena to a sink node. The network lifetime is maximal, when the energy consumption of each node is uniform. Many routing protocols select an optimal path to increase the network lifetime in sensor networks. The energy of the nodes along this optimal path is consumed more, causing their early death. In the multipath routing, data traffic is distributed among the multiple paths, instead of a single optimal path. This work proposes a theoretical frame work to study the node-disjoint multipath wireless sensor network reliability. With higher reliability, higher network lifetime can be achieved. Simulation results show that when the data is transmitted through multiple paths with different data rates, the network lifetime increases. The node criticality factor enhances the network lifetime analysis effectively. © 2013 Inderscience Enterprises Ltd.Item Performance analysis of node-disjoint paths in Multipath routing for wireless sensor networks(2011) Murthy, G.S.; D'Souza, R.J.; Varaprasad, G.Routing in the resource constrained network is still a challenge. To increase the operational lifetme of the wireless senor networks is the major objective of energy efficeint routing protocols. Multipath routing protocols increases the QoS, network reliability, and lifetime. This work analyses the node-dsijoint paths which contribute in realising the objectives of mutlipath routing. This work proposes the three different criteria to select the node-disjoint paths between the source and sink node. They are (i) minimum hop (ii) maximum residual energy and (iii) maximum path cost. End to end delay, residual energy and throughput are the metrics considered to evaluate the performance of three different criteria to select node-disjoint paths between source and destination. � 2011 American Institute of Physics.Item Performance analysis of node-disjoint paths in Multipath routing for wireless sensor networks(2011) Murthy, G.S.; D'Souza, R.J.; Varaprasad, G.Routing in the resource constrained network is still a challenge. To increase the operational lifetme of the wireless senor networks is the major objective of energy efficeint routing protocols. Multipath routing protocols increases the QoS, network reliability, and lifetime. This work analyses the node-dsijoint paths which contribute in realising the objectives of mutlipath routing. This work proposes the three different criteria to select the node-disjoint paths between the source and sink node. They are (i) minimum hop (ii) maximum residual energy and (iii) maximum path cost. End to end delay, residual energy and throughput are the metrics considered to evaluate the performance of three different criteria to select node-disjoint paths between source and destination. © 2011 American Institute of Physics.Item Reliability analysis of route redundancy model for energy efficient node disjoint multipath routing in wireless sensor networks(2012) Shiva, Murthy, G.; D'Souza, R.J.; Varaprasad, G.The objective of every sensor node in a sensor network is to send the sensed data in the phenomena to the sink node. Many routing protocols select an optimal path to increase the network lifetime in sensor networks. The consumption by the nodes along this optimal path is high, thereby causing their early death. In the multipath routing, path reliability is high, because of the availability of alternate paths to the optimal paths. This work proposes a theoretical frame work to study the reliability analysis of route redundancy model for node disjoint multipath networks in wireless sensor networks. The reliability of route redundancy in single path and multiple paths with varied number of nodes and its probability values are discussed. � 2012 Published by Elsevier Ltd.Item Reliability analysis of route redundancy model for energy efficient node disjoint multipath routing in wireless sensor networks(Elsevier Ltd, 2012) Shiva Murthy, G.; D'Souza, R.J.; Varaprasad, G.The objective of every sensor node in a sensor network is to send the sensed data in the phenomena to the sink node. Many routing protocols select an optimal path to increase the network lifetime in sensor networks. The consumption by the nodes along this optimal path is high, thereby causing their early death. In the multipath routing, path reliability is high, because of the availability of alternate paths to the optimal paths. This work proposes a theoretical frame work to study the reliability analysis of route redundancy model for node disjoint multipath networks in wireless sensor networks. The reliability of route redundancy in single path and multiple paths with varied number of nodes and its probability values are discussed. © 2012 Published by Elsevier Ltd.