2017/9/15(五) 14:20 李奇育 教授,國立交通大學 資工系, An Energy Efficiency Perspective on Rate Adaptation for 802.11n NIC
Topic：An Energy Efficiency Perspective on Rate Adaptation for 802.11n NIC
Date&Time：2017/09/15 (五) 14:20
Speaker：李奇育 教授（ 國立交通大學 資工系）
Location：清華大學台達館 DELTA @R216
Bio:
Chi-Yu Li is currently an Assistant Professor with the Department of Computer Science, National Chiao Tung University (NCTU). He received the PhD degree in computer science from University of California, Los Angeles (UCLA) in 2015. Before joining UCLA, he received his Master’s and Bachelor’s degrees from the Department of Computer Science, NCTU. His research interests include wireless networking, mobile networks and systems, and network security. He has published several papers in top-tier academic conferences of both networking and security areas, such as ACM MOBICOM, IEEE INFOCOM, and ACM CCS. In 2016, he received the Award of MTK Young Chair Professor.
Abstract:
Rate adaptation (RA) has been traditionally used to achieve high goodput. In this talk, I will present our contribution on designing RA for 802.11n NICs from an energy-efficiency perspective. We show that current MIMO RA algorithms are not energy efficient for NICs despite ensuring high throughput. The fundamental problem is that the high-throughput setting is not equivalent to the energy-efficient one. Marginal throughput gain may be realized at high energy cost. We then propose EERA and EERA+, two energy-based RA schemes that tradeoff goodput for energy savings at NICs. EERA applies multidimensional ternary search and simultaneous pruning to speed up its runtime convergence in single-client operations, and uses fair airtime sharing to handle multiple-client operations. EERA+ further searches for multiple, staged rates to yield more energy savings over EERA. Our experiments have confirmed their effectiveness in various scenarios.
Date&Time：2017/09/15 (五) 14:20
Speaker：李奇育 教授（ 國立交通大學 資工系）
Location：清華大學台達館 DELTA @R216
Bio:
Chi-Yu Li is currently an Assistant Professor with the Department of Computer Science, National Chiao Tung University (NCTU). He received the PhD degree in computer science from University of California, Los Angeles (UCLA) in 2015. Before joining UCLA, he received his Master’s and Bachelor’s degrees from the Department of Computer Science, NCTU. His research interests include wireless networking, mobile networks and systems, and network security. He has published several papers in top-tier academic conferences of both networking and security areas, such as ACM MOBICOM, IEEE INFOCOM, and ACM CCS. In 2016, he received the Award of MTK Young Chair Professor.
Abstract:
Rate adaptation (RA) has been traditionally used to achieve high goodput. In this talk, I will present our contribution on designing RA for 802.11n NICs from an energy-efficiency perspective. We show that current MIMO RA algorithms are not energy efficient for NICs despite ensuring high throughput. The fundamental problem is that the high-throughput setting is not equivalent to the energy-efficient one. Marginal throughput gain may be realized at high energy cost. We then propose EERA and EERA+, two energy-based RA schemes that tradeoff goodput for energy savings at NICs. EERA applies multidimensional ternary search and simultaneous pruning to speed up its runtime convergence in single-client operations, and uses fair airtime sharing to handle multiple-client operations. EERA+ further searches for multiple, staged rates to yield more energy savings over EERA. Our experiments have confirmed their effectiveness in various scenarios.