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.Somasundaram, KiranSubject: search.filters.subject.OLSR

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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.
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    Component Based Performance Modelling of the Wireless Routing Protocols
    (2008) Tabatabaee, Vahid; Baras, John S.; Purkayastha, Punyaslok; Somasundaram, Kiran
    In this paper, we propose a component based methodology for modelling and design of wireless routing protocols. Componentization is a standard methodology for analysis and synthesis of complex systems. Throughout the paper, we use Optimized Link State Routing (OLSR) protocol as a case study to demonstrate effectiveness of our methodology. We focus on modelling of three main components: neighborhood discovery, selector of topology information to disseminate, and the path selection components. For each component, we identify the inputs, outputs, and a generic methodology for modelling. Using the neighborhood discovery component, we will present our design methodology and design a modified enhanced version of the OLSR NDC, and compare its performance to the neighborhood discovery component of the OLSR protocol.