Research Questions

Extending the Scope of CyberInfrastructure With Broadband Wireless

Will Pressly, Abhijit Sribhashyam {wpressl, asribha}@clemson.edu

May 19, 2008

What is iTiger iTiger is a set of web-based services aimed at mobile devices to enhance the Clemson experience in sports, academics, and around campus. Features will include instant replays and real-time player stats for football games, classroom tools, tools to aid local law enforcement for public safety, and much more.

In addition to serving the campus and nearby community, this project will research network traffic and scalability, prioritized transmission of critical data, and the emerging Wi-Max technology in a real, living environment with potentially thousands of users.

Current Research

The current research presents results from a link capacity measurement study conducted over an IEEE 802.11b/g network with highly stressed radio propagation conditions in a football stadium. Existing capacity studies for IEEE 802.11 networks have considered either stationary or statistical multipath fading channel conditions. In an environment with a high density of people and movement such as in a football stadium or a subway station, the radio characteristics vary much more vibrantly, and their impact on network capacity is not well understood. As a first step to better understand such network characteristics, the study examines the throughput of a mobile terminal over the stadium network in the presence of varying radio conditions due to movement of people and concurrent transmissions by other IEEE 802.11 devices.

• Strategic Partnerships to enhance wireless infrastructure• Social Networking:

•What role can social networking have in the stadium of the future?

• Web Services: •How can the fan experience be enhanced when the 'cyberstadium‘ becomes a network of 'cyberstadiums'?

• Public Safety:• How can the 'cyberstadium' enhance the effectiveness of public safety and homeland security?• Networking:• How can the QoS capabilities of 802.11 and WiMAX interoperate?• How are resources managed when there is a public safety event ?

Future for iTiger• Roll out new prototype for 2008 Football season to include such functionality as:

1. User capacity of 1002. Provide play by play stats on the devices3. Provide replay videos in conjunction with the stats

. Roll out a production by 2009 Football season quality system that generates revenue.. Add support for more portable devices.

Student Ideas : Football heliFAN-cam Student Football IPTV broadcast network tiger clemsonTUBE (fans upload video taken with the N800

PDA)

How iTiger Works

During a Clemson home football game:• Athletic department staff creates the play-by-play stats

• Sent out the Internet to ESPN and to cstv.com who provides the game over the web (clemsontigers.cstv.com)

• Athletic department operates all cameras• If the game is televised video feeds go to ESPN• All video goes to a video production crew (trailers by the graveyard) who create the video presented on the ‘jumbotron’

Meanwhile, in the iTiger Control room:• An operator combine the stats and the video feed into content on the iTiger servers.

The study uses a novel approach to quantify network utilization by the experiment terminal as well as other contending terminals, using a recorded packet trace. From the measured utilization, throughput, and signal strengths, key observations made include the fast variations in signal strength due to crowd movement, throughput’s dependency on signal strength and chosen link rate, and contention with other terminals. Based on the findings, the paper discusses useful for performance assessment, protocol enhancements, and improvements in measurement methodology for such networks.

Video on Demand Server

Wireless Infrastructure

Web Server

Game Stats Parserstatistics

Video Captureprocessjumbotron

Video feed

itiger video content creationprocess

database