UMTS Call Set UP UE Node B System Information: BCCH/BCH Dynamic Resource allocation control procedure info. Idle Mode RRC Connection Request CCCH/RACH UE Identity , Capability Establishment cause transport Channel info Signaling radio Bearer Ciphering etc. RRC Connection Set up Call setup start RRC connection complete Signaling connection establish Initial Direct Transfer DCCH CM Service Request Connection Management CM Service Accept Radio Bearer Information Radio Bearer Set UP Radio Bearer establishment Radio Bearer Set Up Complete Alert/ Connect DCCH Setup , Modify, Release Ringing Connect Acknowledge Call connection Measurement Control Measurements: frequency,Traffic,QoS etc Results Measurement Measurement Report Active Set update Handover Adding Removing Connections Active set update complete RRC connection release Call released RRC connection release complete DCCH System Information Idle mode BCCH / BCH