Institute for Systems Research Technical Reports

Permanent URI for this collectionhttp://hdl.handle.net/1903/4376

This archive contains a collection of reports generated by the faculty and students of the Institute for Systems Research (ISR), a permanent, interdisciplinary research unit in the A. James Clark School of Engineering at the University of Maryland. ISR-based projects are conducted through partnerships with industry and government, bringing together faculty and students from multiple academic departments and colleges across the university.

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Author: search.filters.author.Jain, KaustubhSubject: search.filters.subject.MANETs

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    Studying Real-time Traffic in Multi-hop Networks Using the EMANE Emulator: Capabilities and Limitations
    (2011) Jain, Kaustubh; Roy-Choudhary, Ayan; Somasundaram, Kiran K.; Wang, Baobing; Baras, John S.
    In this paper, we study the fidelity of an open-source software emulator to provide reliable estimation of performance for real-time traffic in mobile ad-hoc networks. We emulate the IEEE 802.11 MAC/PHY (DCF) using the EMANE software emulator deployed on a cluster and run experiments for different multi-hop wireless scenarios with the Optimized Link State Routing (OLSR) protocol. As an instance of real-world usage scenario, we study the performance of real-time streaming media over a mesh network supported by OLSR. In particular, we study the effect of mobility and background traffic on carried load, delay and jitter. As another application, we analyze the impact of the wireless network on the self-similarity of aggregate traffic. Using traffic source models with high variability, we show that the aggregate traffic in the wireless network is self-similar and hence preserves its burstiness at larger time scales. The results are consistent with those obtained from high-fidelity simulation within some limitations of the emulator.
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    Study of OLSR for Real-time Media Streaming over 802.11 Wireless Network in Software Emulation Environment
    (2010-07) Jain, Kaustubh; Somasundaram, Kiran; Wang, Brian; Baras, John; Roy-Chowdhury, Ayan
    In this paper we present a setup to study the real-time traffic carrying performance of optimized Link State Routing (OLSR) protocol using software emulation. We emulate the IEEE 802.11 MAC/PHY using the EMANE software emulator, on a cluster of machines, for different multi-hop wireless scenarios. As an instance of real-world usage scenario, we study the performance of real-time streaming media over a mesh network supported by OLSR. In particular, we study the effect of mobility and background traffic on carried load and jitter. We propose to extend this emulation setup to test the real-time performance of prototype routing protocols such as Stable Path Topology Control (SPTC) and other real-time applications.