This book aims to describe the deployment of 5G-NSA and 5G-SA.
For the 5G-NSA mode, dual MR-DC connectivity is based on radio
measurements allowing the master 4G base station MeNB to add or to remove a 5G
secondary node SgNB.
For the 5G-SA mode, the mobile is attached to the 5G core network. Even
though this book is devoted to the radio access network, the mobile registration,
establishment procedures and re-establishment procedures are also explained.
This book describes the architecture of the NG radio access network and the
5G-NR radio interface according to 3GPP (3rd Generation Partnership Project)
specifications.