<html><head><base href="x-msg://53/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium;"><br></span></div><br><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: center; "><br class="Apple-interchange-newline"><img width="115" height="106" align="left" hspace="12" alt="shieldor" v:shapes="Picture_x0020_2" id="6508f916-47d4-4eef-ad03-0231729ed48f" apple-width="yes" apple-height="yes" src="cid:image003.jpg@01CD2148.38ED7360"><b><span style="font-size: 22pt; font-family: NewCenturySchlbk, serif; ">DEPARTMENT OF<o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 1.5in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: center; "><b><span style="font-size: 22pt; font-family: NewCenturySchlbk, serif; ">ELECTRICAL ENGINEERING<o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: center; "><b><span style="font-size: 22pt; font-family: NewCenturySchlbk, serif; ">SEMINAR SERIES<o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-align: center; "><o:p> </o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 0.5in; "><b><span style="font-family: NewCenturySchlbk, serif; ">Speaker: Roch Guerin, University of Pennsylvania</span></b><b><span style="font-size: 12pt; font-family: NewCenturySchlbk, serif; "><o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 1.5in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -1in; "><b><span style="font-family: NewCenturySchlbk, serif; ">Title: <span class="Apple-converted-space"> </span></span></b><b><span style="font-family: NewCenturySchlbk, serif; ">User-provided connectivity (UPC) services:<o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 1.5in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-family: NewCenturySchlbk, serif; ">A basic model and pricing strategies<o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-family: NewCenturySchlbk, serif; "> Date: Thursday, April 26th <o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 0.5in; "><b><span style="font-family: NewCenturySchlbk, serif; ">Time: 4:30 <o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 0.5in; "><b><span style="font-family: NewCenturySchlbk, serif; ">Room: B-205 <o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 0.5in; "><b><span style="font-family: NewCenturySchlbk, serif; ">Host: Mung Chiang & Soumya Sen <o:p></o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: 0.5in; "><b><span style="font-family: NewCenturySchlbk, serif; "><o:p> </o:p></span></b></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><span style="font-family: NewCenturySchlbk, serif; ">ABSTRACT: </span></b><b><span style="font-size: 10pt; font-family: NewCenturySchlbk, serif; "><span class="Apple-converted-space"> </span></span></b><span style="font-size: 10pt; ">User-provided connectivity (UPC) services offer a possible alternative, or complement, to existing infrastructure-based connectivity. A user allows other users to occasionally connect through its ``home base'' in exchange for reciprocation, or possibly compensation. This service model exhibits strong positive and negative externalities. A large user base makes the service more attractive, as it offers more connectivity options to roaming users, but it also implies a greater volume of (roaming) traffic passing through a user's home base, which can increase congestion. These interactions make it difficult to predict the eventual success of such a service offering, and how to effectively price it. This work introduces a simple model that captures the main features of such a service, and uses it to investigate if and when it might succeed. The model is also used to develop insight and guidelines for pricing such a service. The robustness of the findings is tested numerically across a broad range of configurations that relax the model's many simplifying assumptions.</span><span style="font-size: 10pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; ">Joint work with M. H. Afrasiabi<br><br><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; color: black; "><b><span style="font-family: NewCenturySchlbk, serif; ">BIO: <span class="Apple-converted-space"> </span></span></b><span style="font-size: 10pt; ">Roch Guérin received an engineer degree from ENST, Paris, France, and M.S. and Ph.D. degrees in Electrical Engineering from Caltech. He joined the Electrical and System Engineering department of the University of Pennsylvania in 1998 as the Alfred Fitler Moore Professor of Telecommunications Networks. Prior to joining Penn, he spent many years at the IBM T. J. Watson Research Center in a variety of technical and management positions. From 2001 to 2004 he was on leave from Penn, starting Ipsum Networks, a company that pioneered the concept of route analytics for managing IP networks.<o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; color: black; "><span style="font-size: 10pt; "><o:p> </o:p></span></div><h3 style="margin-right: 0in; margin-left: 0in; font-size: 13.5pt; font-family: 'Times New Roman', serif; margin-bottom: 0.05in; "><span style="font-size: 10pt; font-weight: normal; ">Dr. Guérin has published extensively in international journals and conferences, and holds more than 30 patents. He has also been active in standard organizations such as the IETF where he has co-authored a number of RFCs. His research is in the general area of networked systems and applications, from wired and wireless networks to social networks, and encompasses both technical and “economic” factors that affect network evolution. Dr. Guérin has been an editor for several ACM and IEEE publications and in 2009 became the Editor-in-Chief of the IEEE/ACM Transactions on Networking. He also served as General Chair or Program co-Chair for a number of ACM and IEEE sponsored conferences. Dr. Guérin is an ACM (2006) and IEEE (2001) Fellow. In 1994 he received an IBM Outstanding Innovation Award for his work on traffic management. He received the IEEE TCCC Outstanding Service Award in 2009, and was the recipient of the 2010 INFOCOM Achievement Award for<span class="Apple-converted-space"> </span><i>“Pioneering Contributions to the Theory and Practice of QoS in Networks.”<span class="Apple-converted-space"> </span></i>He was also the co-recipient of the 2010 INFOCOM Best Paper Award for the paper entitled<span class="Apple-converted-space"> </span><i>“On the Feasibility and Efficacy of Protection Routing in IP Networks.”<span class="Apple-converted-space"> </span></i>He was on the Technical Advisory Board of France Telecom for two consecutive terms from 2001 till 2006 and on the Technical Advisory Board of Samsung Electronics in 2003-2004. He joined the Scientific Advisory Board of Simula Research in 2010, and the Scientific Advisory Board of SITI (University Lusofona) in 2012.</span><span style="font-size: 10pt; font-family: NewCenturySchlbk, serif; font-weight: normal; "><o:p></o:p></span></h3><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 18pt; font-family: 'Brush Script MT'; ">Beth Jarvie</span><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; font-family: 'Trebuchet MS', sans-serif; ">Faculty Assistant -Princeton University</span><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; font-family: 'Trebuchet MS', sans-serif; ">School of Engineering and Applied Sciences</span><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; font-family: 'Trebuchet MS', sans-serif; ">Department of Electrical Engineering</span><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; font-family: 'Trebuchet MS', sans-serif; ">Engineering Quadrangle - Room B325</span><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; font-family: 'Trebuchet MS', sans-serif; ">Princeton, NJ 08544</span><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; font-family: 'Trebuchet MS', sans-serif; ">609-258-2213</span><o:p></o:p></div></div></span></blockquote></div><br></body></html>