BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Talks.cam//talks.cam.ac.uk// X-WR-CALNAME:Talks.cam BEGIN:VEVENT SUMMARY:Mapping Mobile Broadband Access - Ellen Zegura\, Georgia Tech DTSTART:20210527T140000Z DTEND:20210527T150000Z UID:TALK160777@talks.cam.ac.uk CONTACT:Srinivasan Keshav DESCRIPTION:Abstract: Internet access can be divided into two types\, fixe d and mobile. Fixed broadband access is relatively better understood in pa rt because it is easier to measure. Providers know where they have deploye d fixed access\, they know which customers have chosen which price plans\, and customers have performance expectations and a path to complaint if th ose expectations are not met. Mobile broadband access\, primarily achieved via cellular service but also through WiFi\, is a completely different st ory. Providers deploy cell towers in known locations but have limited mode ls for propagation and service quality as user endpoints move away from th e tower. Mobile broadband can be significantly affected by time-varying co ngestion in the cell\, user device type and operating system\, device move ment during access\, and environmental factors such as topology\, land cov er\, and buildings. The interaction of pricing with affordability is not w ell understood\, and the tails of access occur in underexamined communitie s such as Native American reservation lands\, rural communities\, and poor urban neighborhoods. There are also significant privacy issues associated with measuring at the granularity of an individual device or home. In thi s talk I will describe what is known (and not) about mobile broadband cove rage in the United States and outline several approaches to improving mapp ing.\n \nBio: Ellen Zegura has been on the faculty in the College of Compu ting at Georgia Tech since 1993. Her research interests lie in computer ne tworking\, computing and social good\, and ethics education. She is a Fell ow of the IEEE and a Fellow of the ACM. She is completing a two year term as Chair of the Computing Research Association Board. \n LOCATION:https://cl-cam-ac-uk.zoom.us/j/4361570789?pwd=Nkl2T3ZLaTZwRm05bzR TOUUxY3Q4QT09&\;from=addon END:VEVENT END:VCALENDAR