Sumesh J. Philip

Learn More
—In this paper, we characterize analytically the multi-access interference in wireless code-division multiple-access sensor networks with uniformly random distributed nodes and study the tradeoff between interference and connectivity. To provide a guideline for improving system behavior, three competitive deterministic topologies are evaluated along with(More)
In a mobile wireless ad-hoc network, nodes move about and relay packets destined for other nodes. One of the biggest challenges in this area is the design of scal-able routing protocols. Recently, a family of routing protocols has emerged that is potentially more scalable than the protocols that discover and/or maintain end-to-end routes. These protocols(More)
— In this paper, we introduce a novel concept of integrating " macro-mobility " information obtained from the sociological movement pattern of mobile MANET users into routing. The extraction of this mobility information is based on our observation that the movement of a mobile user exhibits a partially repetitive " orbital " pattern involving a set of "(More)
— Routing in delay tolerant networks poses a challenging problem compared to a conventional data network due to the uncertainty and time varying nature of network connectivity. Initial research in this area has considered algorithms based on deterministic mobility of the nodes in DTN. While the assumption of deterministic mobility can lay the groundwork for(More)
— Geometric routing using source-destination locations has been widely suggested as a scalable alternative to conventional routing approaches in mobile ad hoc networks. Recently, there has been considerable attention on face routing in planar graphs constructed from overlay graphs in wireless networks. Given a plane tiled into an infinite mesh of polygons,(More)
Geography based routing in mobile ad hoc networks is an application that uses the location information of nodes in a network to route data packets. Since the amount of network state information that each node needs to maintain in order to route packets is minimal, location based routing is considered scalable compared to existing routing protocols in ad hoc(More)
Recently, a new family of protocols has been introduced for large scale ad hoc networks that make use of the approximate location of nodes in the network for geographic routing. Location management plays an important role in such protocols, and in this paper, we propose a deterministic hierachical scheme for managing the location information of nodes, and(More)
A major challenge faced in mobile ad hoc networks (MANET) is locating the devices for communication, especially with high node mobility and sparse node density. Present solutions provided by the ad hoc routing protocols range from flooding the entire network with route requests, to deploying a separate location management scheme to maintain a device(More)