55 lines
2.4 KiB
Plaintext
55 lines
2.4 KiB
Plaintext
# MO-call with Osmux enable on 3GPP AoIP
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msc {
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hscale=2;
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ms [label="MS"], bts [label="OsmoBTS"], bsc[label="OsmoBSC"], mgw_bsc[label="OsmoMGW(bsc)"], m_sc[label="MSC"], mgw_msc[label="OsmoMGW(msc)"];
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bsc <- m_sc [label="BSSMAP RESET (with extension IE: Osmux Support)"];
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bsc -> m_sc [label="BSSMAP RESET ACK (with extension IE: Osmux Support)"];
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...;
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ms box mgw_msc [label="We assume a SDCCH is already established"];
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...;
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ms -> bsc [label="DTAP CM Service Request"];
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bsc -> m_sc [label="Complete Layer 3 Information DTAP CM Service Request"];
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# Allocate MGW/MSC Osmux endpoint
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m_sc -> mgw_msc [label="MGCP CRCX rtpbridge/*@mgw, X-Osmux: *"];
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mgw_msc box mgw_msc [label="Bind to MGW-local Osmux Port (1984)\nAllocate new endpoint 1, MGW's local CID 5"];
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mgw_msc -> m_sc [label="MGCP CRCX rtpbridge/1@mgw OK (MGW:1984, X-Osmux: 5)"];
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bsc <- m_sc [label="BSSAP ASSGN REQ (3GPP AoIP, extension IE: Osmux CID 5)"];
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bts <- bsc [label="RSL CHAN ACT"];
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bts -> bsc [label="RSL CHAN ACT ACK"];
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ms <- bsc [label="Assignment Command"];
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ms -> bsc [label="Assignment Complete"];
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...;
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# connect BTS RTP with BSC-MGW RTP
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bts <- bsc [label="IPA CRCX"];
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bts box bts [label="Bind to BTS-local RTP Port (1000)"];
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bts -> bsc [label="IPA CRCX ACK (BTS:1000)"];
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bsc -> mgw_bsc [label="MGCP CRCX rtpbridge/2@mgw (BTS:1000)"];
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mgw_bsc box mgw_bsc [label="Bind to MGW-local RTP Port (2000)\nConnect to BTS:1000"];
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bsc <- mgw_bsc [label="MGCP CRCX rtpbridge/2@mgw OK (MGW:2000)"];
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bts <- bsc [label="IPA MDCX (MGW:2000)"];
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bts box bts [label="Connect RTP socket to remote (MGW) RTP Port"];
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bts -> bsc [label="IPA MDCX ACK"];
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...;
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mgw_bsc <- bsc [label="MGCP CRCX rtpbridge/2@mgw (MSC:1984, X-Osmux: 5)"];
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mgw_bsc box mgw_bsc [label="Bind to MGW-local Osmux Port (1985)\nConnect to MSC:1984\nAllocate new MGW's local CID 7"];
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mgw_bsc -> bsc [label="MGCP CRCX rtpbridge/2@mgw OK (MGW:1985, X-Osmux: 7)"];
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...;
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bsc -> m_sc [label="BSSAP ASSGN CMPL (3GPP AoIP MGW:1985, extension IE: Osmux CID 7)"];
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m_sc box m_sc [label="Connect remote Osmux to MGW addr from ASSGN CMPL"];
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m_sc -> mgw_msc [label="MGCP MDCX rtpbridge/1@mgw (MGW:1985, X-Osmux: 7)"];
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m_sc <- mgw_msc [label="MGCP MDCX rtpbridge/1@mgw OK (X-Osmux: 5)"];
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...;
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mgw_bsc <=> mgw_msc [label="Osmux Audio MGW:1985 MSC:1984, CID(uplink):5, CID(downlink):7"];
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bts <=> mgw_bsc [label="RTP Audio BTS:1000 MGW:2000"];
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ms <=> bts [label="Um Audio (bidirectional)"];
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ms <-> m_sc [label="DTAP CC ALERTING"];
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}
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