Chapter 8

Operation in Unlicensed and Shared Spectrum

Abstract

The RF spectrum is divided into licensed and license-exempt/unlicensed bands. The traditional cellular communications systems used to exclusively operate in licensed spectrum. However, due to the insufficiency and cost of licensed spectrum below 6 GHz, the telecommunication industry has shifted attention to the unlicensed bands to deploy supplementary carriers or standalone systems. The use of unlicensed spectrum has been increasingly considered by cellular operators as a complementary mechanism to offload traffic from licensed-band RF carriers to increase the overall system throughput. Various approaches to cellular operation in the unlicensed spectrum have been investigated and trialed ...

Get 5G NR now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.