path: root/openbsc/doc
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authorHarald Welte <laforge@gnumonks.org>2009-11-29 20:02:53 +0100
committerHarald Welte <laforge@gnumonks.org>2009-11-29 20:02:53 +0100
commit8c83af65c1902811d8e9823153af09cc59f4d9f6 (patch)
tree676d70a05087c038c86cec04cae3eb13158af2bd /openbsc/doc
parentccd5a8892ded0832bd378fb33a24412b92920963 (diff)
[handover] Implement 04.08 HANDOVER COMMAND
This is needed by a yet-to-be-implemented handover algorithm, after it has allocated a new lchan for the MS. Also missing: handling the actual HANDOVER COMPLETE / FAIL messages in response.
Diffstat (limited to 'openbsc/doc')
1 files changed, 12 insertions, 0 deletions
diff --git a/openbsc/doc/handover.txt b/openbsc/doc/handover.txt
index 524d38625..ac19e8725 100644
--- a/openbsc/doc/handover.txt
+++ b/openbsc/doc/handover.txt
@@ -75,3 +75,15 @@ were achieved with the following settings:
* RXQUAL >= 6: 1 dB
+== Actual Handover on a protocol level ==
+After the BSC has decided a handover shall be done, it has to
+# allocate a channel at the new BTS
+# allocate a handover reference
+# activate the channel on the BTS side using RSL CHANNEL ACTIVATION,
+ indicating the HO reference
+# BTS responds with CHAN ACT ACK, including GSM frame number
+# BSC sends 04.08 HO CMD to MS using old BTS