Change in osmo-msc[master]: add sequence_charts/call_reestablishment.msc

[neels]

neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-msc/+/25074 )


Change subject: add sequence_charts/call_reestablishment.msc
......................................................................

add sequence_charts/call_reestablishment.msc

Change-Id: I6ebc3a0555ef82e1c027ca75b45f8147a3e07ee6
---
M doc/sequence_charts/Makefile.am
A doc/sequence_charts/call_reestablishment.msc
2 files changed, 30 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/74/25074/1

diff --git a/doc/sequence_charts/Makefile.am b/doc/sequence_charts/Makefile.am
index 6782f44..5efe855 100644
--- a/doc/sequence_charts/Makefile.am
+++ b/doc/sequence_charts/Makefile.am
@@ -7,6 +7,7 @@
 	inter_bsc_ho.msc \
 	inter_msc_ho.msc \
 	mncc_call_fsm.msc \
+	call_reestablishment.msc \
 	$(NULL)
 
 CLEANFILES = \
@@ -21,6 +22,7 @@
 	$(builddir)/inter_bsc_ho.png \
 	$(builddir)/inter_msc_ho.png \
 	$(builddir)/voice_call_full.png \
+	$(builddir)/call_reestablishment.png \
 	$(NULL)
 
 dot: \
diff --git a/doc/sequence_charts/call_reestablishment.msc b/doc/sequence_charts/call_reestablishment.msc
new file mode 100644
index 0000000..3c9aea6
--- /dev/null
+++ b/doc/sequence_charts/call_reestablishment.msc
@@ -0,0 +1,28 @@
+msc {
+  hscale="2";
+  ms[label="MS"],cell1[label="Cell 1 (BTS+BSC)"],cell0[label="Cell 0 (BTS+BSC)"],__msc[label="MSC"];
+
+  ms note __msc [label="MM is established\n(e.g. ongoing voice call)"];
+
+  ...;
+
+  ms -x cell0 [label="radio link fails"];
+  ms x- cell0;
+
+  __msc abox __msc [label="Keep MM until timeout"];
+
+  ms => cell1 [label="Channel Required"];
+  ms <= cell1 [label="Immediate Assignment"];
+  ms => cell1 [label="Complete Layer3"];
+  cell1 => __msc [label="Complete Layer3:\nCM Re-Establishment Request"];
+
+  cell0 <= __msc [label="Clear Command"];
+  cell0 => __msc [label="Clear Complete"];
+
+  cell1 <= __msc [label="Cipher Mode Commad"];
+  cell1 <= __msc [label="Cipher Mode Commad\n(with the encryption from CM Re-establishment request?)"];
+  cell1 => __msc [label="Cipher Mode Complete"];
+
+  cell1 <= __msc [label="Assignment Request\nthis Assignment ACKs the CM Re-Establishment"];
+  cell1 => __msc [label="Assignment Complete"];
+}

-- 
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Gerrit-Project: osmo-msc
Gerrit-Branch: master
Gerrit-Change-Id: I6ebc3a0555ef82e1c027ca75b45f8147a3e07ee6
Gerrit-Change-Number: 25074
Gerrit-PatchSet: 1
Gerrit-Owner: neels <nhofmeyr at sysmocom.de>
Gerrit-MessageType: newchange
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