Complete umts call flow

1. UE RNC
UTRA_Idle
RRC Connection Request
[CCCH] RRC
Initial UE ID = IMSI|TMSI+LAI,
Est.Cause = originating conversational call
Initial UE MessageRANAP
CN domain = cs, LAI, SAI, RNC-ID,
NAS-PDU = CM Service Request
call request (User)
RRC Connection Setup[CCCH] RRC
U-RNTI, C-RNTI, signalling radio bearer
RB1..RB4, TrCH configuration, PhCH
configuration, radio access capability
update requirementRRC Connection Setup Complete[DCCH] RRC
Initial Direct Transfer[DCCH] RRC
CN domain = cs, NAS-PDU = MM-
message: CM Service Request
CELL_DCH
UE
UE radio access capabilities
Direct TransferRANAP
SAPI=0, NAS-PDU =
Authentication Req.
Downlink Direct Transfer[DCCH] RRC
CN domain = cs, NAS-PDU =
MM-
message: Authentication Request
UplinkDirect Transfer[DCCH] RRC
CN domain = cs, NAS-PDU = MM-
message: Authentication Response LAI, SAI, NAS-PDU =
Authentication Resp.
Direct TransferRANAP
Security Mode Command
RANAP Security Mode Command
permitted UIA, IK,
permitted UEA, CK, …
selected UIA, selected UEA,
ciphering activation time, …
[DCCH] RRC
[DCCH] RRC Security Mode Complete
Security Mode CompleteRANAP
selected UIA, selected UEA
[DCCH] RRC Uplink Direct Transfer
CN domain = cs, NAS-PDU =
CC-message: Setup
RANAP Direct Transfer
LAI, SAI, NAS-PDU = Setup
RANAP Paging
CN domain = cs, LAI, IMSI,
TMSI, cause
[PCCH] RRC
UE-ID = TMSI|IMSI,
cause = terminating
conversation call|
terminating cause
unknown
UTRA_Idle
MSC Server
…
Paging Type 1
RNC

2. UE RNC
RRC Connection Request
[CCCH] RRC
CN domain = cs, LAI, SAI, RNC-ID,
NAS-PDU = Paging Response
RRC Connection
Setup Complete
Initial Direct Transfer[DCCH] RRC
CN domain = cs, NAS-PDU = MM
message: Paging Response
UE
UE radio access capabilities
Direct Transfer
Authentication Req.
Downlink Direct Transfer[DCCH] RRC
CN domain = cs, NAS-PDU =
MM-
message: Authentication Request
UplinkDirect Transfer[DCCH] RRC
LAI, SAI, NAS-PDU =
Authentication Resp.
Direct TransferRANAP
RANAPSecurity Mode Command
permitted UIA, IK,
permitted UEA, CK, …
selected UIA, selected UEA,
ciphering activation time, …
[DCCH] RRC
[DCCH] RRCSecurity Mode Complete
Security Mode Completeselected UIA, selected UEA
[DCCH] RRC
CN domain = cs,
NAS-PDU = CC-
message: Setup
RANAP Direct Transfer
LAI, SAI, NAS-PDU = Setup
Initial UE ID = IMSI|TMSI+LAI,
Est.Cause = Terminating
conversational call
U-RNTI, C-RNTI, signalling
radio bearer RB1..RB4,
TrCH configuration, PhCH
configuration, radio access
capability update requirement
[CCCH] RRC RRC Connection Setup
[DCCH] RRC
Initial UE MessageRANAP
RANAP
Security Mode Command
RANAP
Downlink Direct Transfer
MSC Server RNC
CELL_DCH
CN domain = cs, NAS-PDU
= MM-message: Authentication
Response

3. UE RNC
[DCCH] RRC
UE
RANAP
Uplink Direct Transfer[DCCH] RRC
CN domain = cs, NAS-PDU =
CC-message: Call Confirmed
LAI, SAI, NAS-PDU =
Call Confirmed
RANAP Direct Transfer
SAPI=0, NAS-PDU =
Call Proceeding
RANAP Direct Transfer
[DCCH] RRC
CN domain = cs, NAS-PDU = CC
-message: Call Proceeding
Downlink Direct Transfer
Radio Bearer Setup
RAB Assignment Request
RABSetupOrModifyItem
RAB Parameter
[DCCH] RRC
RRC state = CELL_DCH
, RAB to setup radio bearer to
setup, signalling radio bearer
, transport channels to add, physical
channel
Radio Bearer Setup Complete[DCCH] RRC
RAB Assignment
Response
successful setup
[DCCH] RRCRAB Assignment Request
RABSetupOrModifyItem
RAB Parameter [DCCH] RRC
Radio Bearer Setup
RAB Assignment ResponseRANAP
[DCCH] RRC
successful setup
Uplink Direct Transfer[DCCH] RRC
LAI, SAI, NAS-PDU = Alerting
Direct TransferRANAP
SAPI=0, NAS-PDU = Alerting
Direct TransferRANAP
CN domain = cs, NAS-PDU =
CC-message: Alerting
Downlink Direct Transfer[DCCH] RRC
Uplink Direct Transfer[DCCH] RRC
LAI, SAI, NAS-PDU = Connect
Direct TransferRANAP
SAPI=0, NAS-PDU = Connect
Direct TransferRANAP
CN domain = cs, NAS-PDU =
CC-message: Connect
Downlink Direct Transfer
[DCCH] RRC
MSC Server RNC
RRC state = CELL_DCH
, RAB to setup radio bearer to
setup, signalling radio bearer
, transport channels to add, physical
channel
Radio Bearer Setup Complete
CN domain = cs, NAS-PDU =
CC-message: Alerting
CN domain = cs, NAS-PDU =
CC-message: Connect

4. UE RNC UE
LAI, SAI, NAS-PDU =
Connection ACK
Direct TransferRANAP
SAPI=0, NAS-PDU = Connection ACK
Direct TransferRANAPCN domain = cs, NAS-PDU =
CC-message: Connection ACK
Uplinkdirect Transfer[DCCH] RRC
Downlink Direct Transfer
[DCCH] RRC
call active
LAI, SAI, NAS-PDU =
Disconnect
Direct TransferRANAP
SAPI=0, NAS-PDU = Disconnect
Direct TransferRANAPCN domain = cs, NAS-PDU =
CC-message: Disconnect
Uplinkdirect Transfer
[DCCH] RRC
[DCCH] RRC
Downlink Direct Transfer
CN domain = cs, NAS-PDU =
CC-message: Disconnect
LAI, SAI, NAS-PDU =
Release
Direct TransferRANAP
SAPI=0, NAS-PDU = Release
Direct TransferRANAP
CN domain = cs, NAS-PDU =
CC-message: Release
Down linkdirect Transfer
[DCCH] RRC
Uplink Direct Transfer
CN domain = cs, NAS-PDU =
CC-message: Release
LAI, SAI, NAS-PDU =
Release complete
Direct TransferRANAP
SAPI=0, NAS-PDU = Release completeDirect TransferRANAPCN domain = cs, NAS-PDU =
CC-message: Release complete
Uplinkdirect Transfer
[DCCH] RRC
Downlink Direct Transfer
[DCCH] RRC
Iu Release Command
cause = normal event
[DCCH] RRC
cause = normal event
[DCCH] RRC
RRC Connection Release Complete
Iu Release Complete
RRC Connection Release
RANAP
released RAB
Iu Release Command
[DCCH] RRC
cause = normal event
[DCCH] RRC
RRC Connection Release Complete
Iu Release Complete
RRC Connection Release
RANAP
released RAB
cause = normal event
RANAP
RANAP
LAI, SAI, NAS-PDU =
Connection ACK
[DCCH] RRC
UTRA_Idle UTRA_Idle
MSC Server RNC
CN domain = cs, NAS-PDU =
CC-message: Release complete