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March 2008 Calendar

CS Masters' Thesis Defense

Title: Video Streaming Friendly Wireless Networks
Speaker: Ramesh Kumar Goel
Date: Friday, March 28, 2008
Time: 12:00 p.m.
Location: GMCS 328
Thesis advisor: Dr Kris Stewart

Abstract:
Wireless Local Area Networks (WLAN) have grown as one of the most sought after wireless technologies and has become the major player in local area communications field. Similarly the multimedia traffic over the WLAN has also increased manifold at much higher rate to fit into the available bandwidth. When the WLAN is overloaded, it has the worst effect on the video received on the user node.

To mitigate this loss of video quality, in this work I have implemented a new scheme in the interface between Logical Link Control and 802.11 MAC protocols. In this scheme the most valuable (and not all) video packets are preserved and given higher priority for sending to MAC layer. This scheme implementation improves the video quality significantly at the receiver end. Side effect on other concurrent traffic such as audio and FTP do occur but are within acceptable limits. Although this scheme causes some loss in the overall throughput; as expected received video quality is increased significantly. There is a loss in FTP throughput however the Audio traffic experienced the throughput loss within the QoS limits. This scheme increases the buffer requirements at receiving nodes.

This work has been implemented using NS2 an open source network simulation software which is widely accepted as standard platform for network related simulations. To implement the work I have extended various ns2 modules and integrated other modules to make the behavior as close as the real WLAN network.
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