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Diffstat (limited to 'doc/manuals/mgw/osmo-bsc-new-mgw.msc')
| -rw-r--r-- | doc/manuals/mgw/osmo-bsc-new-mgw.msc | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/doc/manuals/mgw/osmo-bsc-new-mgw.msc b/doc/manuals/mgw/osmo-bsc-new-mgw.msc new file mode 100644 index 000000000..e618bb721 --- /dev/null +++ b/doc/manuals/mgw/osmo-bsc-new-mgw.msc @@ -0,0 +1,71 @@ +# MO-Call with OsmoBTS + OsmoBSC with true 3GPP AoIP (planned) +msc { + hscale=2; + ms [label="MS"], bts [label="OsmoBTS"], bsc[label="OsmoBSC"], mgcp[label="osmo-bsc_mgcp"], m_sc[label="MSC"]; + + ms box m_sc [label="We assume a SDCCH is already established"]; + ...; + + ms -> m_sc [label="DTAP CC SETUP"]; + ms <- m_sc [label="DTAP CC CALL PROCEEDING"]; + + m_sc box m_sc [label="Bind arbitrary local port (4000)"]; + bsc <- m_sc [label="BSSAP ASSGN REQ (3GPP AoIP MSC:4000)"]; + bts <- bsc [label="RSL CHAN ACT"]; + bts -> bsc [label="RSL CHAN ACT ACK"]; + ms <-> bsc [label="Assignment"]; + ...; + + # connect BTS RTP with BSC-MGW RTP + bts <- bsc [label="IPA CRCX"]; + bts box bts [label="Bind to BTS-local RTP Port (1000)"]; + bts -> bsc [label="IPA CRCX ACK (BTS:1000)"]; + bsc -> mgcp [label="MGCP CRCX rtpbridge/2@mgw (BTS:1000)"]; + mgcp box mgcp [label="Bind to MGW-local RTP Port (2000)\nConnect to BTS:1000"]; + bsc <- mgcp [label="MGCP CRCX rtpbridge/2@mgw OK (MGW:2000)"]; + bts <- bsc [label="IPA MDCX (MGW:2000)"]; + bts box bts [label="Connect RTP socket to remote (MGW) RTP Port"]; + bts -> bsc [label="IPA MDCX ACK"]; + #bsc -> mgcp [label="MGCP MDCX rtpbridge/2@mgw (optional)"]; + #bsc <- mgcp [label="MGCP MDCX rtpbridge/2@mgw OK (optional)"]; + ...; + + mgcp <- bsc [label="MGCP CRCX rtpbridge/2@mgw (MSC:4000)"]; + mgcp box mgcp [label="Bind to MGW-local RTP Port (3000)\nConnect to MSC:4000"]; + mgcp -> bsc [label="MGCP CRCX rtpbridge/2@mgw OK (MGW:3000)"]; + ...; + + bsc -> m_sc [label="BSSAP ASSGN CMPL (3GPP AoIP MGW:3000)"]; + m_sc box m_sc [label="Connect remote RTP to MGW addr from ASSGN CMPL"]; + ...; + + mgcp <=> m_sc [label="RTP Audio MGW:3000 MSC:4000"]; + bts <=> mgcp [label="RTP Audio BTS:1000 MGW:2000"]; + ms <=> bts [label="Um Audio (bidirectional)"]; + ms <-> m_sc [label="DTAP CC ALERTING"]; + ...; + + ms <- m_sc [label="DTAP CC CONNECT"]; + ms -> m_sc [label="DTAP CC CONNECT ACK"]; + --- [label="Voice Call in Progress"]; + ms <- m_sc [label="DTAP CC DISCONNET"]; + ms <- m_sc [label="DTAP CC RELEASE"]; + ms <- m_sc [label="DTAP CC RELEASE COMPL"]; + ...; + bsc <- m_sc [label="BSSMAP CLEAR CMD"]; + bsc -> m_sc [label="BSSMAP CLEAR COMPL"]; + bsc <- m_sc [label="SCCP RLSD"]; + bsc -> m_sc [label="SCCP RLC"]; + ...; + mgcp <- bsc [label="MGCP DLCX rtpbridge/2@mgw"]; + mgcp box mgcp [label="Release MSC-facing local RTP port (3000)"]; + mgcp -> bsc [label="MGCP DLCX rtpbridge/2@mgw OK"]; + + mgcp <- bsc [label="MGCP DLCX rtpbridge/2@mgw"]; + mgcp box mgcp [label="Release BTS-facing local RTP port (2000)"]; + mgcp -> bsc [label="MGCP DLCX rtpbridge/2@mgw OK"]; + + bts <- bsc [label="IPA DLCX"]; + bts box bts [label="Release BTS-local RTP port (1000)"]; + bts -> bsc [label="IPA DLCX OK"]; +} |