[PATCH] osmo-gsm-manuals[master]: Add Message Sequence Chart for MO call with ext. MNCC in Osm...

[Harald Welte]

Review at  https://gerrit.osmocom.org/3179

Add Message Sequence Chart for MO call with ext. MNCC in OsmoMSC

We simply talk to the MGW instead of the BTS, everything else should
remain identical.

Change-Id: I5c249cc2144276a25dba4d7bcb086a34b52d6334
---
A common/chapters/msc_mncc_mo_rtp.msc
1 file changed, 90 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-manuals refs/changes/79/3179/1

diff --git a/common/chapters/msc_mncc_mo_rtp.msc b/common/chapters/msc_mncc_mo_rtp.msc
new file mode 100644
index 0000000..70197bc
--- /dev/null
+++ b/common/chapters/msc_mncc_mo_rtp.msc
@@ -0,0 +1,90 @@
+msc {
+	hscale="4";
+	ms [label="MS"], mgw [label="MGW"], nitb [label="MSC"], emh [label="External MNCC Hdlr"];
+
+	|||;
+	...		[label="Mobile Originated call handled via OsmoMSC, no RTP proxy, IPBTS and external MNCC Handler"];
+	|||;
+	---		[label="User on A-side dials a MO call from his phone"];
+	ms <=> nitb	[label="RF Channel Establishment"];
+	...;
+
+	# MS sends CC SETUP, deliver it to MNCC
+	ms -> nitb 	[label="CC SETUP [MSISDN]"];
+	nitb rbox nitb	[label="CSTATE_INITIATED"];
+	nitb -> emh	[label="MNCC-SETUP.ind [CALLING, BEARER_CAP,
+FACILITY, CALLED, USERUSER, SSVERSION, CCCAP"];
+	emh rbox emh	[label="1 CALL_INIT"];
+	...;
+
+	---		[label="Exact time of RTP-CREATE up to Ext MNCC Hdlr"];
+	nitb <- emh	[label="MNCC_RTP_CREATE[.req]"];
+	mgw <- nitb	[label="MGCP CRCX"];
+	mgw -> nitb	[label="MGCP CRCX ACK (MGW-IP, MGW-PORT)"];
+	nitb -> emh	[label="MNCC_RTP_CREATE[.cnf] (MGW-IP, MGW-PORT)"];
+	...;
+
+	nitb <- emh	[label="MNCC-CALL-PROC.req [BEARER_CAP, FACILITY, PROGRESS]"];
+	emh rbox emh	[label="3 MO_CALL_PROC"];
+	nitb rbox nitb	[label="CSTATE_MO_CALL_PROC"];
+	ms <- nitb	[label="CC CALL PROCEDING"];
+	...;
+
+	# optional
+	---		[label="Optional PROGRESS, can happen 0-N times"];
+	nitb <- emh	[label="MNCC-PROGRESS.req [USERUSER]"];
+	emh rbox emh	[label="3 MO_CALL_PROC"];
+	ms <- nitb	[label="CC PROCEDING"];
+	...;
+
+	# optional
+	---		[label="Optional; Indicates when B-side is ringing"];
+	nitb <- emh	[label="MNCC-ALERT.req [FACILITY, PROGRESS, USERUSER]"];
+	emh rbox emh	[label="4 CALL_DELIVERED"];
+	nitb rbox nitb	[label="CSTATE_CALL_DELIVERED"];
+	ms <- nitb	[label="CC ALERTING"];
+	...;
+
+	# ask the MGW to connect its RTP stream to the given IP+PORT
+	---		[label="Exact time of RTP-CONNECT up to Ext MNCC Hdlr"];
+	nitb <- emh	[label="MNCC_RTP_CONNECT[.req] (EMH-IP, EMH-PORT)"];
+	mgw <- nitb	[label="MGCP MDCX (EMH-IP, EMH-PORT)"];
+	mgw -> nitb	[label="MGCP MDCX ACK"];
+	nitb -> emh	[label="MNCC_RTP_CONNECT[.cnf] (MGW-IP, MGW-PORT)"];
+	...;
+
+	---		[label="User on B-side answers the call"];
+	nitb <- emh	[label="MNCC-SETUP.rsp [FACILITY, PROGRERSS, CONNETED, USERUSER]"];
+	emh rbox emh	[label="? CONNECT_INDICATION"];
+	nitb rbox nitb	[label="CSTATE_CONNECT_IND"];
+	ms <- nitb	[label="CC CONNECT"];
+	...;
+
+	ms -> nitb	[label="CC CONNECT ACK"];
+	nitb rbox nitb	[label="CSTATE_ACTIVE"];
+	nitb -> emh	[label="MNCC-SETUP-COMPL.ind"];
+	emh rbox emh	[label="10 ACTIVE"];
+	...;
+	...;
+	...;
+
+	---		[label="User on A-side hangs up the call"];
+	ms -> nitb	[label="CC DISCONNECT"];
+	nitb rbox nitb	[label="CSTATE_DISCONNET_REQ"];
+	nitb -> emh	[label="MNCC-DISC.ind [CAUSE, FACILITY, USERUSER, SSVERSION]"];
+	emh rbox emh	[label="12 DISCONNET_IND"];
+	...;
+
+	nitb <- emh	[label="MNCC-RELEASE.req [CAUSE, FACILITY, USERUSER]"];
+	emh rbox emh	[label="19 RELEASE_REQ"];
+	nitb rbox nitb	[label="CSTATE_RELEASE_REQ"];
+	ms <- nitb	[label="CC RELEASE"];
+	...;
+
+	ms -> nitb	[label="CC RELEASE COMPLETE"];
+	nitb -> emh	[label="MNCC-RELEASE.cnf [CAUSE, FACILITY, USERUSER, SSVERSION]"];
+	...;
+
+	ms <=> nitb	[label="RF Channel Release"];
+	...;
+}

-- 
To view, visit https://gerrit.osmocom.org/3179
To unsubscribe, visit https://gerrit.osmocom.org/settings

Gerrit-MessageType: newchange
Gerrit-Change-Id: I5c249cc2144276a25dba4d7bcb086a34b52d6334
Gerrit-PatchSet: 1
Gerrit-Project: osmo-gsm-manuals
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>