세미나 및 강연

Abstract:

The use of directional antennas is a promising technique for the provision of high-speed wireless local and personal area networks such as IEEE 802.11ac, IEEE 802.11ad, and IEEE 802.15.3c. In this paper, we propose a new directional MAC protocol for wireless ad hoc networks that is referred to as deafness-aware MAC (DA-MAC). Although a significant number of directional MAC protocols have been proposed, they have not comprehensively resolved the deafness problem. Our proposed DA-MAC protocol can distinguish the deafness problem from collisions by employing logical data and control channels. We provide a discrete-time Markov chain model to analyze the impact of deafness for both an existing technique and DA-MAC. Through extensive simulations, we show that our DA-MAC protocol can significantly outperform the other existing techniques with respect to the throughput, deafness duration, energy consumption, and transmission fairness.

Speaker Bio:

Sungrae Cho received his B.S. and M.S. degrees in Electronics Engineering from Korea University, Seoul, Korea, and his Ph.D. degree in Electrical and Computer Engineering from the Georgia Institute of Technology, Atlanta, GA in 1992, 1994, and 2002, respectively. He is currently a professor in Computer Science and Engineering at Chung-Ang University, Seoul, Korea. Prior to joining Chung- Ang University, he was an assistant professor in Computer Science at Georgia Southern University, Statesboro, GA from 2003 to 2006. In 2003, he was a principal research engineer at Samsung Advance Institute of Technology, Keung, Korea. From 1994 to 1996, he was a member of research staff at Electronics and Telecommunications Research Institute, Daejon, Korea. He held a visiting professorship in National Institute of Standard and Technology, Gaithersburg, MD from 2012 to 2013. He is an area editor of Elsevier Ad Hoc Networks Journal, Journal of Korea Information and Community Society, and Journal of Korean Institute of Information Scientists and Engineers. He is serving a TPC chair and vice chair of ICUFN2016 and ICOIN 2016, respectively. He also served an organizing committee member or a TPC member of numerous international conferences including IEEE SECON 2012, ICOIN 2010?2014, ICUFN 2010?2014 ICTC 2011?2013, IEEE MASS2009, CSIE 2009, IEEE Tridentcom 2007, and IEEE MADWH 2005.