LTE Radio Resource Control (RRC) System Information
System Information is divided into MasterInformationBlock and a number of SystemInformationBlocks. UE needs to locate and read the system information before establishing any connection to the E-UTRA. SystemInformationBlockType1 and all SI messages are transmitted on DL-SCH. UE shall apply the system information acquisition procedure: upon selecting and upon reselecting, after handover completion, after entering E-EUTRA from other RAT, upon return from out of coverage, upon receiving a notification that the system information is changed, upon receiving an indication about the presence of an ETWS notification, upon receiving a request from CDMA2000 upper layer and upon receiving maximum validity duration. System Information Required by UE The System Information required by an UE depends on the RRC state of the UE. RRC Idle In RRC Idle state the following system information are required: MasterInformationBlock SystemInformationBlockType1 SystemInformationBlockType2 through SystemInformationBlocakType8 depending on the type of RATs supported by UE RRC Connected In RRC Connected [...]
