Dr. M. Majid Butt

University of Dublin

“Shared Spectrum Access: Challenges and opportunities for the operators in 5G networks”

Spectrum sharing between network operators is one of the promising solutions to meet high spectrum demand resulting from the emerging applications in 5G networks. Licensed Shared Access (LSA) is a spectrum sharing mechanism where bandwidth is shared between a primary network, called incumbent, and a secondary mobile network. We address dynamic spectrum management mechanisms for LSA systems and propose a fair spectrum management algorithm for distributing incumbent’s available spectrum among the mobile networks. Then, we adapt the proposed algorithm to take mobile network operator’s regulatory compliance aspect into account and penalize the misbehaving network operators in spectrum allocation. We extend our results to the scenario where more than one incumbent offer spectrum to the mobile operators in the same service area and propose various protocols, which ensure fair spectrum allocation within the individual LSA networks and maximize the individual reward for the network operators. Finally, we investigate possibility of improved spectrum sharing between operators in a muti-operator scenario using algorithms from matching theory and show the gain over random matching.

Dr. Majid Butt received PhD and MS degrees in telecommunication from Norwegian University of Science and Technology, Norway and Christian Albrechts University, Kiel, Germany, respectively. He holds the position of research scientist at CONNECT center for future networks, Trinity College Dublin, Ireland. He is recipient of Marie curie Alain Bensoussan postdoctoral fellowship from European Research Consortium for Informatics and Mathematics (ERCIM). He held ERCIM postdoc fellow positions at Fraunhofer Heinrich Hertz Institute, Germany, and interdisciplinary center for research in Security, Reliability and Trust at University of Luxembourg. 

Dr. Majid’s major areas of research interest include communication techniques for wireless networks with focus on radio resource allocation, scheduling algorithms, cooperative communications, cross layer design, energy harvesting and green communication techniques. He has authored more than 40 peer reviewed conference and journal publications in these areas. 
He is a senior member of IEEE and serves as an associate editor for IEEE Access journal and IEEE communication magazine since 2016.