Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 general aspects and principles
The present document is an introduction to the 3GPP TS 36.41x series of technical specifications that define the S1 interface for the interconnection of the evolved NodeB (eNB) component of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) to the Core Network (CN) of the Evolved Packet System (EPS).