3GPP IMS Call Setup and Termination Flow
IMS Call Setup and Termination
3GPP IMS Call Setup and Termination Flow
sequenceDiagram
participant UE_A as UE A (발신자)
participant P_CSCF_A as P-CSCF (A)
participant I_CSCF as I-CSCF
participant S_CSCF as S-CSCF
participant P_CSCF_B as P-CSCF (B)
participant UE_B as UE B (수신자)
%% Call Setup
UE_A->>P_CSCF_A: INVITE
P_CSCF_A->>I_CSCF: INVITE
I_CSCF->>S_CSCF: INVITE
S_CSCF->>P_CSCF_B: INVITE
P_CSCF_B->>UE_B: INVITE
UE_B-->>P_CSCF_B: 180 Ringing
P_CSCF_B-->>S_CSCF: 180 Ringing
S_CSCF-->>I_CSCF: 180 Ringing
I_CSCF-->>P_CSCF_A: 180 Ringing
P_CSCF_A-->>UE_A: 180 Ringing
UE_B-->>P_CSCF_B: 200 OK
P_CSCF_B-->>S_CSCF: 200 OK
S_CSCF-->>I_CSCF: 200 OK
I_CSCF-->>P_CSCF_A: 200 OK
P_CSCF_A-->>UE_A: 200 OK
UE_A->>P_CSCF_A: ACK
P_CSCF_A->>I_CSCF: ACK
I_CSCF->>S_CSCF: ACK
S_CSCF->>P_CSCF_B: ACK
P_CSCF_B->>UE_B: ACK
UE_A-->>UE_B: RTP Media Session (통화 중)
%% Call Termination
UE_A->>P_CSCF_A: BYE
P_CSCF_A->>I_CSCF: BYE
I_CSCF->>S_CSCF: BYE
S_CSCF->>P_CSCF_B: BYE
P_CSCF_B->>UE_B: BYE
UE_B-->>P_CSCF_B: 200 OK
P_CSCF_B-->>S_CSCF: 200 OK
S_CSCF-->>I_CSCF: 200 OK
I_CSCF-->>P_CSCF_A: 200 OK
P_CSCF_A-->>UE_A: 200 OK
| Reference: |
24.229 |
| Title: |
IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 |
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