With the announcements by the Korean mobile service providers and AT&T in the US, turning up 5G service in late 2018, this might be a good time to pause and reexamine the road to 5G – how we got to this point, and where 5G is going in the future. There have been many twists and turns on the way, and I am sure there will be many more. A few of the twists we have recently seen discussed in the media revolves around the definition of 5G. In this article, the primary focus are the packet core and the RAN, and I will discuss 5G based on the 3GPP specifications.
