CSFB to UTRAN using Cell Redirection



title MT CSFB-UTRAN-Cell Redirection

participant UE

participant SS

SS->UE: IP Packet

SS->UE: CS SERVICE NOTIFICATION

UE->SS: EXTENDED SERVICE REQUEST

SS->UE: RRC CONNECTION RELEASE

UE->SS: UTRAN: RRC CONNECTION REQUEST

SS->UE: RRC CONNECTION SETUP

UE->SS: RRC CONNECTION SETUP COMPLETE

UE->SS: ROUTING AREA UPDATE REQUEST

UE->SS: PAGING RESPONSE

SS->UE: AUTHENTICATION REQUEST

UE->SS: AUTHENTICATION RESPONSE

SS->UE: SECURITY MODE COMMAND

UE->SS: SECURITY MODE COMPLETE

SS->UE: SETUP

UE->SS: CALL CONFIRMED

SS->UE: RADIO BEARER SETUP

UE->SS: RADIO BEARER SETUP COMPLETE

UE->SS: ALERTING

SS->UE: CONNECT

UE->SS: CONNECT ACKNOWLEDGE

SS->UE: PS DOMAIN: SECURITY MODE COMMAND

UE->SS: SECURITY MODE COMPLETE

SS->UE: ROUTING AREA UPDATE ACCEPT

UE->SS: ROUTING AREA UPDATE COMPLETE