Navid Hamed Azimi

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Conventional static datacenter (DC) network designs offer extreme cost vs. performance tradeoffs---simple leaf-spine networks are cost-effective but oversubscribed, while "fat tree"-like solutions offer good worst-case performance but are expensive. Recent results make a promising case for augmenting an oversubscribed network with reconfigurable inter-rack(More)
In this paper, we address the problem of preserving generated data in a sensor network in case of node failures. We focus on the type of node failures that have explicit spatial shapes such as circles or rectangles (e.g., modeling a bomb attack or a river overflow). We consider two different schemes for introducing redundancy in the network, by simply(More)
We explore the vision of an <i>all-wireless inter-rack datacenter fabric</i>. Such a fabric, if realized, can offer operator the ability to dynamically reconfigure the network topology to adapt to future traffic demands while eliminating concerns related to cabling complexity. A key enabler for our vision is the use of free space optical (FSO) technology(More)
In this paper we investigate the use of pattern recognition techniques for recognizing two features of Persian music, dastgah and maqam, by their relation to musical scale and mode. We define some statistical measures that characterize the melodic pattern of a musical signal. We then use a standard perceptron for pattern recognition. This technique could be(More)
—In this work, we address the problem of optimal spectrum management in continuous frequency domain in multiuser interference channels. The objective is to maximize the weighted sum of user capacities. Our main results are as follows: (i) For frequency-selective channels, we prove that in an optimal solution, each user uses maximum power; this result also(More)
Femtocells are short-range devices deployed to provide increased coverage and capacity in a small area. They offer a way to increase the capacity of a cellular network by relaying cellular traffic to the wired network. In this paper, we address the problem of optimizing the overall capacity of a femtocell network, as defined by Shannon's law and physical(More)
The volume of data in broadband cellular network is growing exponentially. However, studies have indicated the traffic load on the cellular base stations varies significantly over time. This gives an opportunity to accommodate additional traffic with the same network capacity if some of the traffic (e.g., p2p, cloud sync) can be amenable to `delayed(More)
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