In December 2017, 3GPP officially released its first set of Release 15 specifications describing the physical layer for the 5G New Radio (NR) technology. Final specifications on the 5G NR protocol stack are still ongoing and will be completed by March 2018 with Abstract Syntax Notification One (ASN.1). Further corrections and clarifications in the physical layer specifications can be expected during this timeframe as 3GPP members start implementation and discover potential areas of improvement. Initial 5G NR deployments will focus on a non-standalone (NSA) mode. In the next step, 3GPP will specify a standalone (SA) mode by mid-2018.