73 lines
2.7 KiB
Plaintext
73 lines
2.7 KiB
Plaintext
msc {
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hscale="3";
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ms [label="MS"], bsc [label="BSC"], mgw [label="MGW@MSC"], omsc [label="OsmoMSC"], osc [label="OsmoSIPcon"], sip [label="External SIP World"];
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|||;
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... [label="Mobile Originated call handled via osmo-sip-conector, OsmoMSC, OsmoMGW: Reliable 18x"];
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|||;
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ms <-> bsc [label="RR Establishment"];
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ms <-> omsc [label="MM Procedures (Auth/Ciph/...)"];
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...;
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ms -> omsc [label="CC SETUP (called, bearer_cap)"];
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omsc -> osc [label="MNCC_SETUP_IND (calling, called, bearer_cap)"];
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osc box osc [label="bearer_cap -> SDP"];
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osc -> sip [label="SIP INVITE (from, to, SDP)"];
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osc <- sip [label="SIP 100 Trying (rel100)"];
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omsc <- osc [label="MNCC_CALL_PROC_REQ"];
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ms <- omsc [label="CC CALL PROCEEDING"];
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...;
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sip box sip [label="SIP UA starts ringing"];
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osc <- sip [label="SIP 180 Ringing (SDP)"];
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osc box osc [label="bearer_cap <- SDP"];
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omsc <- osc [label="MNCC_ALERT_REQ"];
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ms <- omsc [label="CC ALERTING"];
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osc -> sip [label="SIP PRACK (180 Ringing)"];
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osc <- sip [label="SIP 200 (PRACK)"];
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omsc box omsc [label="generate BSSMAP codec list from\nSIP-negotiated bearer_cap"];
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bsc <- omsc [label="BSSMAP ASSIGNMENT REQ"];
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ms <-> bsc [label="RR ASSIGNMENT or RR MODE MODIFY"];
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bsc -> omsc [label="BSSMAP ASSIGNMENT COMPL"];
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omsc box omsc [label="determine chosen codec from\nBSSMAP Assignment"];
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mgw <- omsc [label="MGCP CRCX (RAN-side, chosen codec)"];
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mgw -> omsc [label="MGCP CRCX OK (RAN-side)"];
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omsc <- osc [label="MNCC_RTP_CREATE.req (SDP from SIP)"];
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mgw <- omsc [label="MGCP CRCX (EXT-side)"];
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mgw box mgw [label="If there is a common codec between RAN and CN, use that\nElse: Configure Transcoding in MGW"];
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mgw -> omsc [label="MGCP CRCX OK (EXT-side)"];
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omsc -> osc [label="MNCC_RTP_CREATE.resp (CN side IP/Port)"];
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...;
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sip box sip [label="User accepts call"];
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osc <- sip [label="SIP 200 OK (INVITE)"];
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omsc <- osc [label="MNCC_SETUP_RSP"];
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ms <- omsc [label="CC CONNECT"];
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omsc <- osc [label="MNCC_RTP_CONNECT"];
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mgw <- omsc [label="MGCP MDCX (sendrecv)"];
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mgw -> omsc [label="MGCP MDCX OK"];
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ms -> omsc [label="CC CONNECT ACK"];
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omsc -> osc [label="MNCC_SETUP_COMPL_IND"];
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osc -> sip [label="SIP ACK"];
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...;
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ms box ms [label="MO user releases call"];
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ms -> omsc [label="CC DISCONNECT"];
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omsc -> osc [label="MNCC_DISC_IND"];
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osc -> sip [label="SIP BYE"];
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osc <- sip [label="SIP 200 OK"];
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omsc <- osc [label="MNCC_REL_REQ"];
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ms <- omsc [label="CC RELEASE COMMAND"];
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ms -> omsc [label="CC REELASE COMPLETE"];
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omsc -> osc [label="MNCC_REL_CNF"];
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mgw <- omsc [label="MGCP DLCX (all connections on EP)"];
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mgw -> omsc [label="MGCP DLCX OK"];
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bsc <- omsc [label="BSSMAP CLEAR CMD"];
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ms <-> bsc [label="RR Disconnect"];
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bsc -> omsc [label="BSSMAP CLEAR CMPL"];
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}
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