Talks & Seminars
Performance and Power Issues in Long Distance 802.11 Links
Prof. Kameswari Chebrolu, Assistant Professor, Electrical Engg. Dept., IIT Kanpur
Date & Time: April 5, 2006 15:30
Venue: SIC 301, 'C' Block, 3rd Floor, KReSIT

In bridging the digital divide, three important criteria emerge: cost-effectiveness, performance and power optimization. IEEE 802.11 is being used in several installations in the developing world as a cost effective technology. However, a systematic study of the performance of 802.11 in these settings is lacking. Also, typical system configurations in these deployments are not really power efficient. This talk consists of two parts. In the first part, I will present a detailed performance study of a set of long-distance 802.11b links (ranging from 1km to 37km) at various layers of the network stack. I will also comment on the various non-obvious experiences during our study. Our measurements and documentation of our experience should help future network planning as well as protocol design for these networks.

The second part of my talk will focus on power optimization of networking equipment used in the installations. I will describe a novel "Wake-on-WLAN" mechanism for coarse-grained, on-demand power on/off of the networking equipment at a remote site. The novelty also lies in our implementation of a prototype system using low-power 802.15.4-based sensor motes. Preliminary estimates show that the proposed mechanism can save significant power in typical rural networking settings.

Speaker Profile:
Kameswari Chebrolu is an assistant professor in the electrical department of Indian Institute of Technology, Kanpur. Her research interests are in the areas of wireless network architecture, protocol design and analysis. Kameswari obtained her M.S. and Ph.D. degree in Electrical and Computer Engineering from University of California at San Diego, in 2001 and 2004, respectively. More details available at http://home.iitk.ac.in/~chebrolu.
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