BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Los_Angeles BEGIN:DAYLIGHT DTSTART:20260308T030000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:PDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20261101T010000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:PST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260629T163448Z UID:F43A200B-67FE-4071-921C-7666197C81DE DTSTART;TZID=America/Los_Angeles:20260626T090000 DTEND;TZID=America/Los_Angeles:20260626T101500 DESCRIPTION:Abstract:\n\nThe rapid expansion and increasing complexity of L ow Earth Orbit (LEO) satellite constellations demands new digital twins fo r accurate predictive network performance evaluation. Modern LEO networks feature highly dynamic topologies\, dense satellite deployments\, and inte gration with terrestrial 5G/6G systems — that well-exceed current open-s ource/broadly available simulation tool capabilities. A high-fidelity Digi tal Twin model should capture real-time mobility considerations for time-v arying LEO-to-earth downlink\, emerging regulatory considerations (e.g. sp ectrum allocation driven coexistence/interference)\, orbit-aware inter-sat ellite coordination aspects\, to feed into future AI-driven resource optim ization architectural solutions. This talk will start by pointing out defi ciencies in current 3GPP TR 38.111 and 6G-NTN EU Doppler spread models and its consequent impact downstream on NTN Downlink PHY Layer 1 processing a nd highlight ongoing efforts via ns-3-leo full stack network simulator at UW Fundamentals of Networking Lab (https://wp.ece.uw.edu/funlab/).\n\nSpea ker:\n\n[]\n\nProf. Sumit Roy\n\nGuest Scientist\, Nokia Bell Labs (Radio Systems Research)\n\nsumit.1.roy@nokia.com\n\nDept. of Electrical & Comp. Eng\n\nU. Washington\, Seattle\n\nsroy@uw.edu\n\nSumit Roy (Fellow IEEE) r eceived the B. Tech. (EE) degree from the IIT Kanpur in 1983\, and M. S. ( 1985) and Ph. D. (1988) degrees from the University of California (Santa B arbara) in Electrical & Comp. Engineering as well as an M. A. in Statistic s and Applied Probability (1988). He has been a faculty member in Electric al & Computer Engineering (UW) since 1998 where he was appointed to a Dist inguished Term Professorship for Integrated Systems (2014-19) in recogniti on of his scholarly accomplishments. He continues to direct the Fundamenta ls of Networking Laboratory (FUNLaB) https://wp.ece.uw.edu/funlab/\, the l ong-standing maintainer/manager of the Open Source network simulator ns-3 project (www.nsnam.org)\, recognized via the ACM SIGCOMM Networking System s Award 2020 for ``development of a networking system that has had a signi ficant impact on the world of computer networking” https://www.sigcomm.o rg/content/sigcomm-networking-systems-award. His expertise spans analysis/ design and prototyping of future wireless communication systems/networks: next-Gen wireless LANs\, 5G New Radio and beyond 5G/6G standards\, with an emphasis on terrestrial and airborne (vehicular) applications\, multi-sta ndard inter-networking/coexistence and dynamic spectrum access solutions f or spectrum sharing.\n\nHe spent 2001-03 on academic leave at Intel Wirele ss Technology Lab as a Senior Researcher/Standards Architect engaged in sy stems architecture and standards development for ultra-wideband systems (W ireless PANs) and next generation high-speed wireless LANs (802.11n). He w as elevated to IEEE Fellow in 2007 for “contributions to multi-user comm unications theory and cross-layer design of wireless networking standards ”. He served as Program Lead for Innovate Beyond 5G\, the R&D component of OUSD R&E’s 5G-to-xG Initiative (2020-22) [now renamed FutureG Office https://rt.cto.mil/future-home]\, where managed a RD&P portfolio focused o n dual-use of commercial (5G) technologies for Federal use cases and overs aw 3GPP contributions. He is currently Distinguished Lecturer for IEEE Fut ure Networks Technical Community (https://futurenetworks.ieee.org/) and IE EE Comm. Society (https://www.comsoc.org/engagement-community/distinguishe d-lecturers) and serves as Assoc. E-i-C for IEEE Comm. Standards Magazine (https://www.comsoc.org/publications/magazines/ieee-communications-standar ds-magazine/editorial-board).\n\nVirtual: https://events.vtools.ieee.org/m /561632 LOCATION:Virtual: https://events.vtools.ieee.org/m/561632 ORGANIZER:abrahash@seattleu.edu SEQUENCE:25 SUMMARY:Towards a Digital Twin for LEO Non Terrestrial Network Performance URL;VALUE=URI:https://events.vtools.ieee.org/m/561632 X-ALT-DESC:Description: <br /><p>Abstract:</p>\n<p>The rapid expansion and increasing complexity of Low Earth Orbit (LEO) satellite constellations de mands new digital twins for accurate predictive network performance evalua tion. Modern LEO networks feature highly dynamic topologies\, dense satell ite deployments\, and integration with terrestrial 5G/6G systems &mdash\; that well-exceed current open-source/broadly available simulation tool cap abilities. A high-fidelity Digital Twin model should capture real-time mob ility considerations for time-varying LEO-to-earth downlink\, emerging reg ulatory considerations (e.g. spectrum allocation driven coexistence/interf erence)\, orbit-aware inter-satellite coordination aspects\, to feed into future AI-driven resource optimization architectural solutions. This talk will start by pointing out deficiencies in current 3GPP TR 38.111 and 6G-N TN EU Doppler spread models and its consequent impact downstream on NTN Do wnlink PHY Layer 1 processing and highlight ongoing efforts via ns-3-leo f ull stack network simulator at UW Fundamentals of Networking Lab (<a href= "https://wp.ece.uw.edu/funlab/)">https://wp.ece.uw.edu/funlab/)</a>.</p>\n <p>Speaker:</p>\n<p><img src="https://events.vtools.ieee.org/vtools_ui/med ia/display/face0503-5b44-49ec-8643-777f7c2b4c52" alt="" width="179" height ="268"></p>\n<p><strong><span lang="EN-IN" style="font-size: 14.0pt\; line -height: 107%\;">Prof. Sumit Roy</span></strong></p>\n<p><strong><span lan g="EN-GB" style="font-size: 14.0pt\; line-height: 107%\; mso-ansi-language : EN-GB\;">Guest Scientist\, Nokia Bell Labs (Radio Systems Research)</spa n></strong></p>\n<p><strong><span lang="EN-GB" style="font-size: 14.0pt\; line-height: 107%\; mso-ansi-language: EN-GB\;"><span style="mso-spacerun: yes\;">&nbsp\;</span></span></strong><span lang="EN-IN"><a href="mailto:s umit.1.roy@nokia.com"><strong><span lang="EN-GB" style="font-size: 14.0pt\ ; line-height: 107%\; mso-ansi-language: EN-GB\;">sumit.1.roy@nokia.com</s pan></strong></a></span></p>\n<p><strong><span lang="EN-GB" style="font-si ze: 14.0pt\; line-height: 107%\; mso-ansi-language: EN-GB\;">Dept. of Elec trical &amp\; Comp. Eng </span></strong></p>\n<p><strong><span lang="EN-GB " style="font-size: 14.0pt\; line-height: 107%\; mso-ansi-language: EN-GB\ ;">U. Washington\, Seattle</span></strong></p>\n<p><strong><span lang="EN- GB" style="font-size: 14.0pt\; line-height: 107%\; mso-ansi-language: EN-G B\;"><span style="mso-spacerun: yes\;">&nbsp\;</span></span></strong><span lang="EN-IN"><a href="mailto:sroy@uw.edu"><strong><span lang="EN-GB" styl e="font-size: 14.0pt\; line-height: 107%\; mso-ansi-language: EN-GB\;">sro y@uw.edu</span></strong></a></span><strong><span lang="EN-IN" style="font- size: 14.0pt\; line-height: 107%\; mso-ansi-language: EN-GB\;"> </span></s trong></p>\n<p>Sumit Roy (Fellow IEEE) received the B. Tech. (EE) degree f rom the IIT Kanpur in 1983\, and M. S. (1985) and Ph. D. (1988) degrees fr om the University of California (Santa Barbara) in Electrical &amp\; Comp. Engineering as well as an M. A. in Statistics and Applied Probability (19 88). He has been a faculty member in Electrical &amp\; Computer Engineerin g (UW) since 1998 where he was appointed to a Distinguished Term Professor ship for Integrated Systems (2014-19) in recognition of his scholarly acco mplishments. He continues to direct the Fundamentals of Networking Laborat ory (FUNLaB) https://wp.ece.uw.edu/funlab/\, the long-standing maintainer/ manager of the Open Source network simulator ns-3 project (www.nsnam.org)\ , recognized via the ACM SIGCOMM Networking Systems Award 2020 for ``devel opment of a networking system that has had a significant impact on the wor ld of computer networking&rdquo\; https://www.sigcomm.org/content/sigcomm- networking-systems-award. His expertise spans analysis/design and prototyp ing of future wireless communication systems/networks: next-Gen wireless L ANs\, 5G New Radio and beyond 5G/6G standards\, with an emphasis on terres trial and airborne (vehicular) applications\, multi-standard inter-network ing/coexistence and dynamic spectrum access solutions for spectrum sharing .</p>\n<p>He spent 2001-03 on academic leave at Intel Wireless Technology Lab as a Senior Researcher/Standards Architect engaged in systems architec ture and standards development for ultra-wideband systems (Wireless PANs) and next generation high-speed wireless LANs (802.11n). He was&nbsp\;eleva ted to IEEE Fellow in 2007 for &ldquo\;contributions to multi-user communi cations theory and cross-layer design of wireless networking standards&rdq uo\;. He served as Program Lead for Innovate Beyond 5G\, the R&amp\;D comp onent of OUSD R&amp\;E&rsquo\;s 5G-to-xG Initiative (2020-22) [now renamed FutureG Office https://rt.cto.mil/future-home]\, where managed a RD&amp\; P portfolio focused on dual-use of commercial (5G) technologies for Federa l use cases and oversaw 3GPP contributions. He is currently Distinguished Lecturer for IEEE Future Networks Technical Community (https://futurenetwo rks.ieee.org/) and IEEE Comm. Society (https://www.comsoc.org/engagement-c ommunity/distinguished-lecturers) and serves as Assoc. E-i-C for IEEE Comm . Standards Magazine (https://www.comsoc.org/publications/magazines/ieee-c ommunications-standards-magazine/editorial-board).</p> END:VEVENT END:VCALENDAR