oadcast of common control information. Notification of UEs in RRC.IDLE, for example, about a terminating call, for ETWS. Transfer of dedicated control information, that is, information for one specific UE. The following are the main services that RRC expects from lower layers: PDCP: integrity protection and ciphering. RLC: reliable and in-sequence transfer of information, without introducing duplicates and with support for segmentation and concatenation. The main functions of the RRC sublayer include: Broadcast of System Information related to the non-access stratum (NAS). Broadcast of System Information related to the access stratum (AS). Paging. Establishment, maintenance and release of an RRC connection between the UE and E-UTRAN including: Allocation of temporary identifiers between UE and E-UTRAN. Configuration of signaling radio bearer(s) for RRC connection including low priority SRB (signaling radio bearer) and high priority SRB. Security functions including key management. Establishment, configuration, maintenance and release of point to point Radio Bearers. 3GPP Evolved Packet System (EPS) Mobility functions including: UE measurement reporting and control of the reporting for inter-cell and inter-RAT mobility. Handover. UE cell selection and reselection and control of cell selection and reselection. Context transfer at handover. Notification for MBMS services. Establishment, configuration, maintenance and release of Radio Bearers for MBMS services. QoS management functions. UE measurement reporting and control of the reporting. NAS direct message transfer to/from NAS from/to UE. 3.8 EPS Architecture The EPS network is designed as a flat architecture comprising of fewer elements than its predecessors GSM and UMTS. It consists of three elements namely radio base station, MME (Mobility Management Entity) and a Gateway. The base station called eNodeB (EUTRAN Node B) and the core network Gateway (GW) are the two nodes that are present in the user plane. The node that performs control-plane functionality (MME)