1.(MIB, SIB):Master Information Block (MIBs) and System Information Block (SIBs) elements allow UE to find and sync itself to network.Ģ.Random Access Preamble (RAP):Is the first message from the UE to eNB, to achieve uplink synchronization in order to obtain the resource for the third message.ģ.Random Access Preamble Response (RAP Response):Random Access Preamble response allows the UE to send further messages.Ĥ.Radio Resource Connection (RRC LTE):The UE uses UL-SCH allocation message to eNodeB which contains UE identity (typically S-TMSI: MMEC+M-TMSI) and the establishment cause for the RRC connection.ĥ.Radio Resource Connection Setup (RRC Setup):eNodeB sends DL-SCH message to the UE in order to create the signaling radio bearer (SRB).
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