Vinodkrishnan Kulathumani

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Intrusion detection is a surveillance problem of practical import that is well suited to wireless sensor networks. In this paper, we study the application of sensor networks to the intrusion detection problem and the related problems of classifying and tracking targets. Our approach is based on a dense, distributed, wireless network of multi-modal(More)
The <i>Kansei</i> testbed at The Ohio State University is designed to facilitate research on networked sensing applications at scale. <i>Kansei</i> embodies a unique combination of characteristics as a result of its design focus on sensing and scaling: (i) Heterogeneous hardware infrastructure with dedicated node resources for local computation, storage,(More)
Project ExScal (for Extreme Scale) fielded a 1000+ node wireless sensor network and a 200+ node peer-to-peer ad hoc network of 802.11 devices in a 1.3km by 300m remote area in Florida, USA during December 2004. In comparison with previous deployments, the ExScal application is relatively complex and its networks are the largest ones of either type fielded(More)
We present a fast local clustering service, FLOC, that partitions a multi-hop wireless network into nonoverlap-ping and approximately equal-sized clusters. Each cluster has a clusterhead such that all nodes within unit distance of the clusterhead belong to the cluster but no node beyond distance m from the clusterhead belongs to the cluster. By asserting m(More)
Recent experiments have taken steps towards realizing the vision of extremely large wireless sensor networks, the largest of these being ExScal, in which we deployed about 1200 nodes over a 1.3km by 300m open area. Such experiments remain especially challenging because of: (a) prior observations of failure of sensor network protocols to scale, due to(More)
—We present a fast, local clustering service, FLOC, that partitions a multihop wireless network into nonoverlapping and approximately equal-sized clusters. Each cluster has a clusterhead such that all nodes within unit distance and some nodes within distance m of the clusterhead belong to the cluster. We show that, by asserting a stretch factor m ! 2, FLOC(More)
Surveillance systems based on sensor network technology have been shown to successfully detect, classify and track targets of interest over a large area. State information collected via the sensor network also enables these systems to actuate mobile agents so as to achieve surveillance goals such as target capture and asset protection. But satisfying these(More)
Distributed observation and control of mobile objects via static wireless sensors demands timely information in a <i>distance-sensitive</i> manner: Information about closer objects is required more often and more quickly than that of farther objects. In this article, we present a wireless sensor network protocol, Trail, that supports distance-sensitive(More)
Distance-sensitivity guarantee in querying is a highly desirable property in wireless sensor networks as it limits the cost of executing a " query " operation to be within a constant factor of the distance to the nearest node that contains an answer. However, such a tight guarantee may require building an infrastructure for efficient resolution of queries,(More)
—In this paper, we focus on a control based surveillance application using a wireless sensor network in which information from the network is used to actively guide a mobile agent leading to eventual pursuit of one or more evaders in a large region. We exploit distance sensitivity as a locality concept in designing a scalable pursuit control system.(More)