Prof. Illsoo Sohn

  Professor

  Department of Computer Science and Engineering

  Seoul National University of Science & Technology

  232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea

  Email:  isohn@seoultech.ac.kr

 Biography

Illsoo Sohn received the B.S., M.S., and Ph. D. degrees in 2003, 2005, and 2009, respectively from Seoul National University, Seoul, Korea, all in the field of electrical engineering. He worked as a postdoctoral researcher at Wireless Networking and Communication Group, University of Texas at Austin from 2009 to 2010. He worked as a senior research engineer at Advanced Communication Technology Research Lab., LG Electronics from 2010 to 2012. He worked as a network design engineer at Network Strategy Department, KT from 2012 to 2013. From 2013 to 2017, he was an assistant professor at Department of Electronics Engineering in Gachon University. From 2017, he is an assistant professor at Department of Computer Science and Engineering in Seoul National University of Science & Technology. His current research interests include statistical inference, message-passing algorithms, multi-user MIMO, multi-cell MIMO, time division duplex, distributed antennas systems, and cross-layer optimization.

Dr. Sohn is the recipient of the IEEE802.11ac Award for Significant Technical Contribution to the MAC (2014), LG Group R&D Award for core-technology development of next-generation WLAN (2012), Heinrich Hertz Award for Best Communications Letter (2011), the Gold Prize in the 15th Samsung Humantech Paper Contest (2009), Silver Award in IEEE International Student Paper Contest, Seoul Section (2008), and Best Poster Paper Award in IEEE International Student Paper Contest, Seoul Section (2007). He received the Korea Government Fellowship (KOSEF) during his Ph. D. studies.

 Research Interests

• Massive MIMO:  TX/RX beamforming, feedback control, user scheduling

• Multicell Cooperation/Small Cell:  coordinated multi-point transmission/reception, inter-cell interference coordination

• Internet of Things/Post WLAN:  distributed multiple access, distributed interference control, power save algorithms

• Device-to-Device Comm.:  user cooperative diversity, virtual MIMO

• Graph Theory:  message-passing algorithms, belief-propagation, statistical inference

• 5G Networks:  3GPP LTE-Advanced, IEEE802.11ac Very High Throughput (VHT), IEEE802.11af TV White Space (TVWS), IEEE802.11ah wireless sensor network, smart grid

 Work Experience

  08/2012~08/2013:  Manager, Department of Network Strategy, KT

• • • • Evolution strategy of 4G Networks

      • LTE small cells commercialization

  11/2010~07/2012:  System Engineer, Advanced Communications Tech. Lab., LG Electronics

• • • • 3GPP LTE-Advanced (Rel. 11) standard activities

      • IEEE802.11ac VHT / 11af TVWF / 11ah standard activities

  09/2009~09/2010:  Post-Doc. Researcher, Wireless Network & Communications Group, University of Texas at Austin

• • • • Distributed wireless network control via statistical inference

      • Inter-Cell Interference Coordination for 4G systems

 Selected Publications

• S. H. Lee and I. Sohn, "Affinity Propagation for Energy-Efficient BS Operations in Green Cellular Networks," IEEE Transactions on Wireless Communications, vol. 14, no. 8, pp. 4534-4545, Aug. 2015.

• I. Sohn, S. H. Lee, and J. G. Andrews, "Belief Propagation for Distributed Downlink Beamforming in Cooperative MIMO Cellular Networks," IEEE Transactions on Wireless Communications, vol. 10, no. 12, pp. 4140-4149, Dec. 2011.

  • I. Sohn and J. G. Andrews, "Approaching Large-System Limits Faster in Multiuser MIMO with Adaptive Channel Feedback Adjustments," IEEE Communications Letters, vol. 14, no. 12, pp. 1125-1127, Dec. 2010. [IEEE Heinrich Hertz Award]

  • I. Sohn, J. G. Andrews, and K. B. Lee, “MIMO Broadcast Channel with Spatial Heterogeneity,” IEEE Transactions on Wireless Communications, vol. 9, no. 8, pp. 2449-2454, Aug. 2010.

  • I. Sohn, K. B. Lee, Y. S. Choi, “Comparisons of Decentralized Time Slot Allocation Strategy for Asymmetric Traffic in TDD Systems,” IEEE Transactions on Wireless Communications, vol. 8, no. 6, pp. 2990-3003, June 2009.