Skip to content

Spectrum Sharing in the 3GPP 5G New Radio (NR) Specifications 9/12/18

September 12, 2018 at 3:30 pm

207 DeBartolo Hall

Dr. Ralf Bendlin

Principal Member of Technical Staff

AT&T Labs



In June of 2018, 3GPP approved the completion of the 5G New Radio (NR) specifications. These include support of coexistence of LTE and NR within the bandwidth of an LTE carrier in both the downlink and uplink. Because a core requirement of the LTE-NR coexistence design has been the ability of legacy LTE devices to operate on such carriers, 5G NR can be deployed on spectrum that is concurrently used for 4G LTE whereas previously dedicated spectrum had to be provisioned for each new generation of the cellular air interface. 

This tutorial-style seminar will give a comprehensive introduction to the LTE-NR coexistence feature. After a brief review of the 5G NR network architecture and key physical layer aspects, semi-static and dynamic LTE-NR coexistence will be introduced in both a time-division and frequency-division manner. By means of LTE-NR coexistence as an example, the audience will learn about the 5G NR physical layer channels, signals and procedures with a particular focus on initial access, radio resource management, power control, and HARQ/scheduling procedures. As yet another means of 5G NR spectrum sharing, NR-based access to unlicensed spectrum will also be briefly discussed.


Dr. Ralf Bendlin is a Principal Member of Technical Staff at AT&T Labs in Austin, Texas. Before joining AT&T Labs, he was a Senior Wireless Systems Architect with Intel Corporation in Portland, Oregon and a Systems Engineer with Texas Instruments Inc. in Dallas, Texas. He has worked on algorithm development, performance prediction, optimization, systems architecture, and technology strategy for current and next-generation wireless networks and has actively participated in the definition of several global communications standards for which he holds several patents. Dr. Bendlin holds a Bachelor’s degree and a Master’s degree from the Munich University of Technology in Munich, Germany as well as a Master’s degree and a Ph.D. from the University of Notre Dame in South Bend, Indiana. All degrees are in Electrical Engineering and Information Technology. He currently is a member of the College of Engineering Advisory Council at the University of Notre Dame and has previously served as the Technical Program Chair of the 2017 IEEE International Symposium on Dynamic Spectrum Access Networks and as Guest Editor of the IEEE Transactions on Cognitive Communications and Networking (TCCN).

Add To Calendar