Universal Mobile Telecommunications System (UMTS); User Equipment (UE) procedures in idle mode and procedures for cell reselection in connected mode (V8.9.0; 3GPP TS 25.304 version 8.9.0 Release 8)
The present document specifies the Access Stratum (AS) part of the Idle Mode procedures applicable to a UE. The nonaccess stratum (NAS) part of Idle mode procedures and processes is specified in [5]. The present document also specifies cell selection and reselection processes applicable to UEs in connected mode. Invocation of these processes is described in [4]. The present document specifies the model for the functional division between the NAS and AS in a UE. The present document applies to all UEs that support at least UTRA@ including multi-RAT UEs as described in 3GPP specifications@ in the following cases: - When the UE is camped on a UTRA cell; - When the UE is searching for a cell to camp on; NOTE: The details for those cases are described in the specifications of the other RAT. The present document presents also examples of inter-layer procedures related to the idle mode processes and describes idle mode functionality of a multi-RAT UTRA/GSM/E-UTRA UE. The present document also specifies how idle-mode and reselection procedures are affected by the provision of MBMS services.