Change in osmo-bsc[master]: add doc/location_services_ta.msc

[neels]

neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bsc/+/20381 )


Change subject: add doc/location_services_ta.msc
......................................................................

add doc/location_services_ta.msc

Change-Id: I9372c588bf8ee68a3995102b295198f35e32eec8
---
M doc/Makefile.am
A doc/location_services_ta.msc
2 files changed, 50 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/81/20381/1

diff --git a/doc/Makefile.am b/doc/Makefile.am
index a2321ab..e5d35b6 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -13,6 +13,7 @@
 	$(builddir)/handover-inter-bsc-out.png \
 	$(builddir)/handover-inter-bsc-in.png \
 	$(builddir)/mgw-endpoint.png \
+	$(builddir)/location_services_ta.png \
 	$(NULL)
 
 dot: \
diff --git a/doc/location_services_ta.msc b/doc/location_services_ta.msc
new file mode 100644
index 0000000..e6bef38
--- /dev/null
+++ b/doc/location_services_ta.msc
@@ -0,0 +1,49 @@
+msc {
+  hscale="2";
+
+  ms[label="MS/BTS"],bsc[label="BSC"],smlc[label="SMLC"],__msc[label="MSC"];
+
+  ||| [label="Location Services (LCS): Perform Location Request using TA"];
+
+  |||;
+  --- [label="MS in DEDICATED MODE (currently active)"];
+
+  ms =>> bsc [label="earlier Measurement Report provides Timing Advance"];
+
+  bsc <<= __msc [label="PERFORM LOCATION REQUEST\n3GPP TS 48.008 3.2.1.71"];
+
+  bsc =>> smlc [label="BSSMAP-LE PERFORM LOCATION REQUEST\n3GPP TS 49.031 9.1\nwith BSSLAP APDU = TA Layer3\n3GPP TS 48.071 4.2.8"];
+
+  smlc rbox smlc [label="SMLC uses TA included in TA Layer3"];
+
+  bsc <<= smlc [label="BSSMAP-LE PERFORM LOCATION RESPONSE\n3GPP TS 49.031 9.2"];
+
+  bsc =>> __msc [label="PERFORM LOCATION RESPONSE\n3GPP TS 48.008 3.2.1.72"];
+
+  ...;
+  ...;
+  --- [label="MS in IDLE MODE (not connected)"];
+
+  bsc <<= __msc [label="PERFORM LOCATION REQUEST\n3GPP TS 48.008 3.2.1.71"];
+
+  bsc =>> smlc [label="BSSMAP-LE PERFORM LOCATION REQUEST\n3GPP TS 49.031 9.1"];
+
+  smlc rbox smlc [label="SMLC needs TA information,\nasks BSC via BSSLAP"];
+
+  bsc <<= smlc [label="BSSMAP-LE CONNECTION ORIENTED INFORMATION\n3GPP TS 49.031 9.12\nwith BSSLAP APDU = TA Request\n3GPP TS 48.071 4.2.1"];
+
+
+  ms <<= bsc [label="RR Paging Request\n3GPP TS 48.018 9.1.22-24"];
+
+  ms =>> bsc [label="RSL CHANNEL REQUIRED\n3GPP TS 48.058 8.5.3\nincludes Access Delay (9.3.17) == Timing Advance"];
+
+  ms =>> bsc [label="RR Paging Response\n3GPP TS 48.018 9.1.25"];
+
+  ms <<= bsc [label="RF CHANNEL RELEASE\n3GPP TS 48.058 8.4.14"];
+
+  bsc =>> smlc [label="BSSMAP-LE CONNECTION ORIENTED INFORMATION\n3GPP TS 49.031 9.12\nwith BSSLAP APDU = TA Response\n3GPP TS 48.071 4.2.2"];
+
+  bsc <<= smlc [label="BSSMAP-LE PERFORM LOCATION RESPONSE\n3GPP TS 49.031 9.2"];
+
+  bsc =>> __msc [label="PERFORM LOCATION RESPONSE\n3GPP TS 48.008 3.2.1.72"];
+}

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Gerrit-Project: osmo-bsc
Gerrit-Branch: master
Gerrit-Change-Id: I9372c588bf8ee68a3995102b295198f35e32eec8
Gerrit-Change-Number: 20381
Gerrit-PatchSet: 1
Gerrit-Owner: neels <nhofmeyr at sysmocom.de>
Gerrit-MessageType: newchange
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