Nakjung Choi Alcatel-Lucent, Bell-Labs Seoul Ltd., 7fl. DMC R&D Center, Digital Media City E3-2, Sangam-dong, Mapo-gu, Seoul, 120-270, Korea (tel)  +82-2-380-2422 (fax)  +82-2-380-2481 (E-mail)  nakjung.choi_at_alcatel-lucent.com

Education

• I joined Alcatel-Lucent, Bell-Labs Seoul Ltd. as Member of Technical Staff on April 2010, and from January 2014 am leading Network System and Service (NSS) team in Network Algorithm, Protocol, and Security (NAPS) program in addition to Technical Director of Bell Labs Seoul.
• From September 2009 to April 2010, I was a post-doctoral fellow in Multimedia & Mobile Communications Lab., School of Computer Science and Engineering, Seoul National University, Korea.
• I received BS and Ph.D degrees from School of Computer Science and Engineering, Seoul National University, Korea, in 2002 and 2009, respectively.

Research Interests

Networked Cloud

• LTE/LTE-A V-RAN (Virtual RAN) or C-RAN (Cloud RAN) Architectire
• BS Collaboration in RU/DU separated environment
• Data Delivery in the Cloud, e.g., Content-Centric Networking

Green Networking

• Green Data Delivery Architecture/Protocols
• Energy Efficient IEEE 802.11 Architecture/Protocols

Video Streaming over Wireless

• Multicasting in Multi-Rate IEEE 802.11 WLANs (IEEE 802.11 TGv/aa)
• HTTP-based (Video) Adaptive Streaming in Multi-Rate IEEE 802.11 WLANs
• Cognitive Radio MAC for Video Streaming

Recent Publications

International Journal

• Sangheon Pack, Seongman Min, Taewon Song, Wonjung Kim, Nakjung Choi, and Hyunhee Park, "RA-PSM: A Rate-Aware Power Saving Mechanism in Multi-Rate Wireless LANs," submitted
• Hitoshi Asaeda, Ruidong Li, and Nakjung Choi, "Container-Based Unified Testbed for Information-Centric Networking," IEEE Network Magazine, November/December 2014.
• Jinyoung Han, Nakjung Choi, Taekyoung Kwon, and Yanghee Choi, "A Target-centric Surveillance System based on Localization and Social Networking," Springer Multimedia Tools and Applications, Vol. 73, No. 1, pp. 241-265, November 2014.
• Jaehyun Hwang, Joon Yoo, and Nakjung Choi, "Deadline and Incast Aware TCP for Cloud Data Center Networks," Elsevier Computer Networks (COMNET) Special Issue on Communications and Networking in the Cloud, Vol. 68, pp. 20-34, August 2014.
• Jaehyun Hwang, Junghwan Lee, Nakjung Choi, and Chuck Yoo, "HAVS: Hybrid Adaptive Video Streaming for Mobile Devices," IEEE Transactions on Consumer Electronics, Vol. 60, No. 2, pp. 210-216, May 2014.
• Junghwan Lee, Jaehyun Hwang, Nakjung Choi, and Chuck Yoo, "SVC-based Adaptive Video Streaming over Content-Centric Networking," KSII Transactions on Internet and Information Systems (TIIS), Vol. 7, No. 10, pp. 2430-2447, October 2013.
• Nakjung Choi, Yongho Seok, and Taekyoung Kwon, "Exploiting Multi-User Diversity for Uplink Throughput in IEEE 802.11 WLANs," IEEE Communications Letters, Vol. 17, No. 9, pp. 1710-1713, September 2013.
• Sunghwan jung, Nakjung Choi*, and Taekyoung Kwon, "An Iterative Analysis of Single-hop B-MAC Networks under Poisson Traffic," Journal of Communications and Networks (JCN), Vol. 14, No. 1, pp. 40-50, February 2012.
• Dukhyun Chang, Kideok Cho, Nakjung Choi, Ted "Taekyoung" Kwon, and Yanghee Choi, "A Probabilistic and Opportunistic Flooding Algorithm in WIreless Sensor Networks," Elsevier Computer Communications (COMCOM), Vol. 35, No. 4, pp. 500-506, February 2012.
• Kihun Kim, Younghyun Kim, Sangheon Pack, and Nakjung Choi, "A SNR-based Admission Control Scheme in WLAN-based Vehicular Networks," EURASIP Journal on Wireless Communications and Networking, Vol. 2011, No. 204, December 2011.
• Nakjung Choi, Yongho Seok, Taekyoung Kwon, and Yanghee Choi, "Multicasting Multimedia Streams in IEEE 802.11 Networks: A Focus on Reliability and Rate Adaptation," ACM/Springer Wireless Networks (WINET), Vol. 17, No. 1, pp. 119-131, January 2011.

International Conference/Workshop

• Jaime Llorca, Claudio Sterle, Antonia M. Tulino, Nakjung Choi, Antonio Sforza, and Annunziata Esposito, "Joint Content-Resource Allocation in Software Defined Virtual CDNs," accepted for IEEE ICC 2015 - Third International Workshop on Cloud Computing Systems, Networks, and Applications (CCSNA), London, UK, June 2015.
• Nakjung Choi, Jeongran Lee, and Gwangsu Kim, "A Statistical Approach to Smooth Video Quality Adaptation in IEEE 802.11 Wireless LANs," International Conference on ICT Convergence (ICTC), Busan, Korea, October 2014 (invited).
• Hoon-gyu Choi, Jungmin Yoo, Taejoong Chung, Nakjung Choi, Ted "Taekyoung" Kwon, and Yanghee Choi, "CoRC: Coordinated Routing and Caching for Named Data Networking," ACM/IEEE Symposium on Architectures for Networking and Communications Systems (ANCS), Marina del Rey, CA, USA, October 2014.
• Dukhyun Chang, Myungchul Kwak, Nakjung Choi, Ted "Taekyoung" Kwon, "C-flow: An efficient content delivery framework with OpenFlow," International Conference on Information Networking (ICOIN), Phuket, Thailand, February 2014.
• Nakjung Choi, Jeongran Lee, Jaehyun Hwang, "Scalable and Energy Efficient WiFi Management," IEEE International Conference on Consumer Electronics (ICCE), Las Vegas, USA, January 2014.
• Jaehyun Hwang, Nakjung Choi, Junghwan Lee, Chunk Yoo, "SVC-based Hybrid Video Streaming in Mobile CE Devices," IEEE International Conference on Consumer Electronics (ICCE), Las Vegas, USA, January 2014.
• Bing Han, Xiaofei Wang, Nakjung Choi, Ted "Taekyoung" Kwon, Yanghee Choi, "AMVS-NDN: Adaptive Mobile Video Streaming and Sharing in Wireless Named Data Networking," IEEE INFOCOM NOMEN 2013, Turin, Italy, July 2013.
• Jaime Llorca, Antonia Tulino, Kyle C Guan, Jairo O Esteban, Matteo Varvello, Nakjung Choi, and Dan Kilper, "Dynamic In-Network Caching for Energy Efficient Content Delivery," IEEE INFOCOM 2013 (mini-conference), Turin, Italy, July 2013.
• Taejoong Chung , Jinyoung Han, Hojin Lee, Ted "Taekyoung" Kwon, Yanghee Choi, and Nakjung Choi, "Spatial and Temporal Locality of Swarm Dynamics in BitTorrent," Passive and Active Measurement (PAM) Conference (accepted as a poster), Hong Kong, March 2013.
• Jaehyun Hwang, Joon Yoo, and Nakjung Choi, "IA-TCP: A Rate Based Incast-Avoidance Algorithm for TCP in Data Center Networks," IEEE International Conference on Communications (ICC), Ottawa, Canada, June 2012.
• Nakjung Choi, Kyle C. Guan, Dan Kilper, and Gary Atkinson, "In-Network Caching Effect on Optimal Energy Consumption in Content-Centric Networking," IEEE International Conference on Communications (ICC), Ottawa, Canada, June 2012.
• Gwangwoo Park, Haneul Ko, Sangheon Pack, Nakjung Choi, "Quality-Aware Rate Adaptation for Scalable Video Multicast in Rate Adaptive Wireless Networks," IEEE INFOCOM 2012 Student Workshop, Orland, USA, March 2012.
• Nakjung Choi, Hyoseop Lee, Mauricio Cortes, and Wonsuck Lee, "Lookup System Design for Networked Cloud," IEEE International Conference on ICT Convergence (ICTC) 2011, Seoul, Korea, September 2011 (invited).
• Wonyoung Kwak, Jinyoung Han, Nakjung Choi, Taekyoung Kwon, and Yanghee Choi, "A Surveillance System based on Social Networking and Localization," IEEE International Conference on Multimedia and Expo (ICME) Advances in Automated Multimedia Surveillance for Public Safety (AAMS-PS) Workshop, Barcelona, Spain, July 2011.
• Kihun Kim, Younghyun Kim, Sangheon Pack, and Nakjung Choi, "A SNR-based Admission Control Scheme in WLAN-based Vehicular Networks," IEEE International Wireless Communications and Mobile Computing (IWCMC) Conference, Istanbul, Turkey, July 2011.