Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Universal Mobile Telecommunications System (UMTS) access stratum; Services and functions (V14.0.0; 3GPP TS 23.110 version 14.0.0 Release 1
The present document specifies the services provided by the Access Stratum to the rest of the system. The adopted architecture is given by TS 23.101 [2]. The present document describes the main functions visible at the boundary between the Access Stratum and the rest of the system@ it describes in general terms the information flows@ both control and user data@ over this boundary and relevant for the Access Stratum. The present document is the basis of the detailed specifications of the protocols which rule the information flows@ both control and user data@ between the Access Stratum and the parts of UMTS outside the Access Stratum@ and of the detailed specifications of the UTRAN. These detailed specifications are to be found in other Technical Specifications.