LTE UE RRC

The 3GPP Release 9 compliant LTE UE RRC layer provides the following funcionallity and features :

RRC Layer:|Extensive feature list|.

Functionality supported-

• System Information acquisition and processing
• Connection control mechanisms including connection establishment, initial security activation, connection reconfiguration, connection re-establishment, connection release and radio resource configuration.
• Mobility from EUTRA
• Measurement configuration, performing measurements and measurement report triggering.
• Support for ASN.1.
• Notification of UEs in RRC_IDLE, e.g. about a terminating call, for ETWS.
• ­Transfer of dedicated control information, i.e. information for one specific UE.
• The RRC protocol includes the following main functions:
•  ­Broadcast of system information:
• Information applicable for UEs in RRC_IDLE, e.g. cell (re­)selection parameters, neighbouring cell information and information (also) applicable for UEs in RRC_CONNECTED, e.g. common channel configuration information.
• Including NAS common information;
• Including ETWS notification;
•  RRC connection control:
• ­Paging;
• ­Establishment/ modification/ release of RRC connection, including e.g. assignment/ modification of UE identity (C­RNTI), establishment/ modification/ release of SRB1 and SRB2, access class barring;
• Initial security activation, i.e. initial configuration of AS integrity protection (SRBs) and AS ciphering (SRBs, DRBs).
•   ­RRC connection mobility including e.g. intra­frequency and inter­frequency handover, associated security handling, i.e. key/ algorithm change, specification of RRC context information transferred between network nodes.
•  ­Establishment/ modification/ release of RBs carrying user data (DRBs).
• ­Radio configuration control including e.g. assignment/ modification of ARQ configuration, HARQ configuration, DRX configuration.
• ­QoS control including assignment/ modification of semi­persistent scheduling (SPS) configuration information for DL and UL, assignment/ modification of parameters for UL rate control in the UE, i.e. allocation of a priority and a prioritised bit rate (PBR) for each RB.
•  ­Measurement configuration and reporting.
•  ­Establishment/ modification/ release of measurements (e.g. intra­frequency, inter­frequency and inter­
• RAT measurements);
• Setup and release of measurement gaps;
• Measurement reporting;
• Other functions including e.g. transfer of dedicated NAS information and non­3GPP dedicated information, transfer of UE radio access capability information, support for E­UTRAN sharing (multiple PLMN identities).
• Generic protocol error handling.
• Support of self­configuration and self­optimisation.