Jithin George

Optimal and Game-theoretic Resource Allocations for Multiuser Wireless Energy-Harvesting and Communications Systems

Research summary:

The fifth generation of wireless cellular networks will see a paradigm shift towards extreme base station densification with massive amounts of data transmissions, massive number of mobile users, and massive number of transmitter systems. To support this, network resources need to be efficiently allocated to multiple nodes with consideration for energy-efficiency, fairness and security. The advancements in wireless powered communications (WPC) have enabled high power conversion efficiency of wireless signals over practical transmission ranges, leading to a new dimension in resource allocation taking into account power-splitting at the receivers. 

We consider two main WPC technologies namely 1) Simultaneous wireless information and power transfer (SWIPT) which transmit power and information signals from the same access point, and 2) Separate energy access points (EAPs) for power signals and data access points (DAPs) for information signals. For multi-user SWIPT systems with fairness constraints, we developed a max-min energy harvesting solution while satisfying the sum power budget and minimum user rate. We also considered the security of SWIPT in OFDMA networks with multiple legitimate users communicating in the presence of an eavesdropper.  All these problems are NP-hard in nature, thus, we decompose the problem into distinct stages and developed efficient centralized optimization algorithms to tackle them. We investigated novel gametheoretic formulations to facilitate individual user utility maximizations when the users are rational players. We also designed an energy trading game between multiple relay-energy access points (REAPs) and DAP for buying energy for users. 

Project Duration: 2015-2019

Supervisors:

 Graduate Research Student Profile:

I started my PhD at the University of Melbourne in the Electrical and Electronic Engineering Department in September 2015. I received the M. Tech. degree in Telecommunication Systems Engineering (with Institute Medal) from Indian Institute of Technology Kharagpur in 2015 and the B.Tech degree in Electronics and Communication Engineering from the University of Kerala in 2012. Currently, I hold the chair position of IEEE Industrial Application Society (IAS), the University of Melbourne chapter. Besides, I provide research assistance and consultations to the Melbourne School of Design (MSD) on construction technology.

Contact Email: jithing@student.unimelb.edu.au

LinkedIn Profile: https://www.linkedin.com/in/jithin-george-phd-a5018062/