  The 5th generation (5G) new radio (NR) is designed to support a wide range of
use cases, requirements, and services from enhanced mobile broadband (eMBB) to
ultra-reliable low-latency communications (URLLC). NR signals are designed to
meet stringent requirements, and in particular the physical downlink control
channel (PDCCH) which requires careful consideration. In this paper, we provide
a comprehensive analysis on the PDCCH blocking probability in a network where
multiple users need to be scheduled for receiving downlink control information.
We evaluate the performance of blocking probability in terms of various network
parameters including number of users, size of the control resource set
(CORESET), and PDCCH aggregation levels (ALs). Our analysis reveals fundamental
tradeoffs and key insights for efficient network design in terms of PDCCH
blocking probability.
