AAU logo

PhD defence by Thomas Haaning Jacobsen


23.08.2019 kl. 12.30 - 16.00


“Radio Resource Management for Uplink Grant-FreeUltra-Reliable Low-Latency Communications”

The support for Ultra-Reliable Low-Latency Communications (URLLC) in fifth-generation (5G) New Radio (NR) will fuel the next industrial revolution, the tactile internet and autonomous vehicle communication, by reliably connecting sensors, actuators and controllers with, for example, a maximum of 1ms latency with at least 99.999% probability of success. The challenging latency and reliability requirement calls for significant improvements of multiple components of the radio access network (RAN). Grant-free (GF) is one of the main enablers for uplink URLLC as it reduces the latency by omitting the conventional dynamic scheduling procedure. However, GF transmissions present a critical trade-off; while it reduces the latency budget it also removes scheduling flexibility and introduces intra-cell interference when GF radio resources are shared among URLLC devices. In this work, radio resource management (RRM) techniques are revisited and novel techniques are proposed. Recommendations on the use of uplink GF URLLC in 5G NR are provided. Finally, insights into the trade-off between latency and URLLC capacity are presented and used to provide an interesting outlook on how to efficiently support URLLC in the uplink.


Assessment Committee
Professor, Olav Emerik Tirkkonen, Aalto University, Finland
Associate Professor, Zhibo Pang, ABB Corporate Research, Sweden
Associate Professor, Cedomir Stefanovic, Aalborg University (Chairman)

Professor, Preben E. Mogensen, Aalborg University
Senior Research Engineer, István Z. Kovács, Nokia Bell Labs

Associate Professor, Troels B. Sørensen, Aalborg University

After the defence there will be a reception at Fredrik Bajers Vej 7, room A1-112
Please feel welcome to join


Free of Charge


Wireless Communication Networks Section Department of Electronic Systems


Fredrik Bajers Vej 7, room A4-108

Gå til arrangementslisten


Se listen