Maulik Desai

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Nicholas Maxemchuk

Antonella Molinaro

Mediterranean University of Reggio Calabria

University of Applied Sciences and Arts Western Switzerland

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Polar coordinate routing for multiple paths in wireless networks

by Nicholas Maxemchuk and Maulik Desai

2010 IEEE International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM), 2010

We propose Polar Coordinate Routing (PCR) to create multiple paths between a source and a destina... more We propose Polar Coordinate Routing (PCR) to create multiple paths between a source and a destination in wireless networks. Our scheme creates paths that are circular segments of different radii connecting a source and a destination. We propose a non−euclidean distance metric that allows messages to travel along these paths. Using PCR it is possible to maintain a known separation among the paths, which reduces the interference between the nodes belonging to two separate routes. Our extensive simulations show that while PCR achieves a known separation between the routes, it does so with a small increase in overall hop count. Moreover, we demonstrate that the variances of average separation and hop count are lower for the paths created using PCR compared to existing schemes, indicating a more reliable system. Existing multi−path routing schemes in wireless networks do not perform well in areas with obstacles or low node density. To overcome adverse areas in a network, we integrate PCR with simple robotic routing, which lets a message circumnavigate an obstacle and follow the trajectory to the destination as soon as the obstacle is passed. 1

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A case for packet deflection in structured wireless topologies

by Maulik Desai and Nicholas Maxemchuk

30th IEEE International Performance Computing and Communications Conference, 2011

We promote the idea of deflecting packets in a structured wireless mesh deployment. In any wirele... more We promote the idea of deflecting packets in a structured wireless mesh deployment. In any wireless network, upon arrival of new packets when the sources and destinations are selected uniformly the majority of traffic goes through the center of the network, while the edges are underutilized. This situation becomes more apparent in a structured mesh deployment. We demonstrate that the

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Regulating user arrivals at a Mobile IP Home Agent

2010 Second International Conference on COMmunication Systems and NETworks (COMSNETS 2010), 2010

AbstractWith the increasing levels of data usage in mobile cellular networks, Mobile IP and its ... more AbstractWith the increasing levels of data usage in mobile cellular networks, Mobile IP and its variants serve as the de facto standard for mobility management. At high user loads, the Mobile IP Home Agent is unable to support registration requests within the required delay limit, ...

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Coping with link failures in centralized control plane architectures

2010 Second International Conference on COMmunication Systems and NETworks (COMSNETS 2010), 2010

AbstractRecently proposed SoftRouter and 4D network architectures recommend having the least amo... more AbstractRecently proposed SoftRouter and 4D network architectures recommend having the least amount of intelligence in the switches. They advocate transferring control plane functionalities to general-purpose servers that could govern these switches remotely. A link failure in ...

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On the Multihop Performance of Synchronization Mechanisms in High Propagation Delay Networks

IEEE Transactions on Computers, 2000

We analyze the single and multihop performance of time synchronization mechanisms for challenging... more We analyze the single and multihop performance of time synchronization mechanisms for challenging environments characterized by high propagation delays, low duty-cycle operation, and imprecise clocks, such as underwater acoustic sensor networks. We find that receiver-receiver-based schemes are unsuitable for such environments, and therefore focus primarily on sender-receiver schemes. According to our analysis, a one-way dissemination approach provides good clock skew estimation but poor offset estimation while a two-way exchange approach provides accurate offset estimation but imprecise clock skew estimation. In average, using one-way scheme can result in significant cumulative propagation error over multiple hops, and using two-way can lead to high variance of propagation error. We develop and analyze a hybrid one-way dissemination/two-way exchange technique, and verify the performance of our hybrid scheme through trace-based experiments. The results suggest that this hybrid approach can provide bounded average error propagation in multihop settings and significantly lower variance of propagation error.

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A packet encoding algorithm for network coding with multiple next hop neighbor consideration and its integration with delta routing

by Maulik Desai, Nicholas Maxemchuk, and Thierry Klein

2013 Ieee 14th International Symposium on a World of Wireless Mobile and Multimedia Networks, 2013

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