Gautam D. Bhanage

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— Providing air-time guarantees across a group of clients forms a fundamental building block in sharing an access point (AP) across different virtual network providers. Though this problem has a relatively simple solution for downlink group scheduling through traffic engineering at the AP, solving this problem for uplink (UL) traffic presents a challenge(More)
—The 802.16e standard for broadband wireless access mandates the presence of QoS classes, but does not specify guidelines for the scheduler implementation or mechanisms to ensure air time fairness. Our study demonstrates the feasibility of controlling downlink airtime fairness for slices while running above a proprietary WiMAX basestation (BS) scheduler. We(More)
As networking research expands into new frontiers, the research community has felt a need for a heterogeneous networking research infrastructure to experiment with the interaction and integration of different types of networks, and to test the performance of various networking protocols in realistic environments. This requirement has led to the Global(More)
— Many asset tracking applications demand long-lived, low-cost, and continuous monitoring of a large number of items, which has posed a significant challenge to today's RFID design. In order to satisfy these requirements , we propose to adopt transmit-only tags without a receiver , which can offer both low power and low cost. In spite of their great(More)
— Wireless network emulator testbeds have become increasingly important for realistic, at-scale experimental evaluation of new network architectures and protocols. Typically, wireless network performance measurements are made at multiple layers of the wireless protocol stack, i.e. link layer, MAC layer and network layer. This study highlights the impact of(More)
Most space constrained indoor wireless testbeds have majority of the nodes under a single collision domain. Emulation of multi-hop topologies on such testbeds is usually achieved either through the use of additional hardware like external noise injection or software techniques such as MAC frame filtering. We show that while these two techniques are able to(More)
We are developing a finite-state Markov Chain (MC) channel model to capture wireless channel variations due to shadowing, which occur at a time scale of seconds. The Markov Chain is constructed by partitioning the entire range of shadowing into a finite number of intervals. We determine the MC transition matrix in two ways: (i) via a parsimonious modeling(More)
A scalable approach to building large scale experimentation testbeds involves multiplexing the system resources for better utilization. Virtualization provides a convenient means of sharing testbed resources among experimenters. The degree of programmability and isolation achieved with such a setup is largely dependent on the type of technology used for(More)
A promising application for RFID tags is to trace valuable assets in an inventory. In such systems, the key challenge is to achieve reliable and energy-efficient tag reads. This paper proposes a novel tag reading protocol, Relay-MAC, which aims at reducing the information sent over the network and the energy spent in collision detection and handling by(More)