Title of the talk: Techno-Economic Optimization Problems Related to 5G Technology
Speaker: Dr. Gaurav Saha, Post-doctoral Scholar, Department of Electrical and Computer Engineering, Ohio State University.
Day, Date and Time: Tuesday, August 24, 2021 11 am to 12 pm.
Abstract:
Spectrum sharing and Millimeter Wave Communication are two promising technologies for 5G and beyond communication. In this talk, I will talk mostly about the economic aspects of the spectrum sharing market and briefly about the technical aspects of millimeter-wave communication.
In a spectrum sharing market, the wireless service providers (WSP) and the regulator (the government) are two important stakeholders. In this seminar, I will address various economics related optimization problems from the perspective of the WSPs and the regulator. The aim of a WSP is to maximize its profit. I will discuss an adversarial online algorithm to maximize the worst-case profit of a WSP. A fundamental byproduct of this online algorithm is a generalization of the famous ski-rental problem which can have widespread applications.
The regulator on the other hand is interested in maximizing spectrum utilization. I will discuss a game-theoretic framework to optimize various parameters of spectrum sharing market to maximize spectrum utilization. These parameters include (i) duration of a spectrum license, (ii) the number of spectrum bands, and (iii) the ratio of the licensed and unlicensed spectrum bands. Out of these three parameters, optimizing the duration of spectrum license is my most novel contribution and hence I will focus on this topic. Optimizing the duration of spectrum license involves solving a combinatorial optimization problem which is notoriously difficult to solve as the number of WSPs, N, increases. I will discuss an O(N^3) algorithm to solve the optimization problem which uses an elegant structure of the feasible combinations of the operators.
I will also briefly discuss my current research work on designing scheduling algorithms for millimeter-wave communication using tools from partially observable markov decision processes. Finally, I will end the seminar with future research plans which range from valuation modeling of spectrum bands to state estimation of cyber-physical systems under combinatorial constraints.
About the Speaker:
Gourav Saha received the B.E. degree from Anna University, Chennai, India, in 2012, the M.S. degree from IIT Madras, India, in 2015, and the Ph.D. degree from Rensselaer Polytechnic Institute, Troy, NY, USA, in 2020, all in electrical engineering. His research interests lie broadly in control theory, online algorithms, game theory, stochastic decision theory, as well as their applications in wireless communication and network economics. His Ph.D. work was on spectrum sharing market. He has authored three journal papers during his Ph.D. all of which are published in IEEE/ACM Transactions on Networking. He received the Allen B. Dumont prize from RPI for his Ph.D. work. He is currently a post-doctoral scholar with the Department of Electrical and Computer Engineering of Ohio State University working with millimeter-wave communication. He recently was one of the recipients of a two-year CIFellows post-doctoral fellowship and will be starting at Purdue University as a post-doctoral fellow from September 2021 working with millimeter-wave communication. He received the best teaching assistantship award from IIT-Madras. He is a frequent reviewer of IEEE Transactions of Mobile Computing and IEEE Internet of Things Journal.