3G_4G_5G/5G

3GPP IMS Call Setup and Termination Flow

양된백성 2025. 4. 1. 18:33

 

 

 

 

 

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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