Zhisheng Niu, Tsinghua University
A wait-and-see two-threshold optimal sleeping policy for a single server queue with bursty traffic

Feb 2, 2018, 11:00am; EEB 132 (note day change)


Making idle servers sleep is considered to be a key approach to reduce energy consumption of various information and communication systems. Optimal sleeping policies for a single server has been derived only for non-bursty traffic in prior work. In this talk, for the first time, we study the optimal sleeping policy for a single server queue with bursty traffic. Key factors including switch-over energy consumption as well as delay performance are considered. We formulate the problem as a POMDP (partially observable Markov decision process), and show that it can be solved by observing the time elapsed since the last arrival (TESLA). The optimal sleeping policy is shown to be a wait-and-see two-threshold policy and the simulation results show the effectiveness of the policy. Numerical results also show that traffic burstiness can help to enhance the system performance in terms of weighted sum of the energy-efficiency and delay.


Zhisheng Niu graduated from Beijing Jiaotong University, China, in 1985, and got his M.E. and D.E. degrees from Toyohashi University of Technology, Japan, in 1989 and 1992, respectively. During 1992-94, he worked for Fujitsu Laboratories Ltd., Japan, and in 1994 joined with Tsinghua University, Beijing, China, where he is now a professor at the Department of Electronic Engineering. His major research interests include queueing theory, traffic engineering, mobile Internet, radio resource management of wireless networks, and green communication and networks.
Dr. Niu has served as Chair of Emerging Technologies Committee (2014-15), Director for Conference Publications (2010-11), and Director for Asia-Pacific Board (2008-09) in IEEE Communication Society, and currently serving as Director for Online Contents (2018-19) and Area Editor of IEEE Trans. Green Commun. & Networks. He received the Outstanding Young Researcher Award from Natural Science Foundation of China in 2009 and the Best Paper Award from IEEE Communication Society Asia-Pacific Board in 2013. He was also selected as a distinguished lecturer of IEEE Communication Society (2012-15) as well as IEEE Vehicular Technologies Society (2014-16). He is a fellow of both IEEE and IEICE.