Protocol Sequence - Packet Call (Two PDP)

(1) UE <--> NW : Registration (Combined or Non-Combined)

(2) UE <--> NW : < IDLE >

(3) UE  : < Make a MO Packet Call >

(4) UE --> NW : RRC CONNECTION REQUEST

(5) UE <-- NW : RRC CONNECTION SETUP

(6) UE --> NW : RRC CONNECTION SETUP COMPLETE

(7) UE --> NW : GMM SERVICE REQUEST

(8) UE <-- NW : AUTHENTICATION AND CIPHERING REQUEST

(9) UE --> NW : AUTHENTICATION AND CIPHERING RESPONSE

(10) UE <-- NW : SECURITY MODE COMMAND

(11) UE --> NW : SECURITY MODE COMPLETE

(12) UE --> NW : ACTIVATE PDP CONTEXT REQUEST (1st PDP)

(13) UE <-- NW : RADIO BEARER SETUP (Single Data Flow)

(14) UE --> NW : RADIO BEARER SETUP COMPLETE

(15) UE <-- NW : ACTIVATE PDP CONTEXT ACCEPT

(16) UE : < Make another Packet Call triggering 2nd PDP >

(17) UE <-- NW : ACTIVATE PDP CONTEXT REQUEST (2nd PDP)

(18) UE <-- NW : RADIO BEARER SETUP (Two Data Flow)

(19) UE <-- NW : RADIO BEARER SETUP COMPLETE

(20) UE <-- NW : ACTIVATE PDP CONTEXT ACCEPT