G. Varaprasad

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This paper considers a network where nodes are connected randomly and can fail at random times. The criticalnode test detects nodes, whose failures are malicious behavior, disconnects or significantly degrades the performance of the network. The critical node is an element, position or control entity whose disruption, is immediately degrades the ability of(More)
Wireless ad hoc networks are growing important because of their mobility, versatility, and ability to work with fewer infrastructures. The mobile ad hoc network is an autonomous system consisting of mobile nodes connected with wireless links. Establishing a path between two nodes is a complex task in wireless networks. It is still more complex in the(More)
This paper introduces a framework called an efficient dynamic key management scheme for wireless sensor networks. It reduces the number of transmissions needed for rekeying to avoid the stale keys. In addition to energy savings, it also provides a secure communication frame work where the sensed data is encoded using RC4 encryption mechanism. The key to RC4(More)
Android is the latest trend in mobile operating systems. Even though Android provides a complete set of application, middleware and Linux kernel for the phone applications developer, it does not fully utilize several standard kernel features. This work attempts to address the limitations of Android specific to power management at kernel level and proposes(More)
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)