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| author | Neels Hofmeyr <neels@hofmeyr.de> | 2021-07-18 12:49:18 +0200 |
|---|---|---|
| committer | Neels Hofmeyr <neels@hofmeyr.de> | 2021-07-29 22:40:59 +0200 |
| commit | 69682352786a7e276c695d9b274bd353025a5e4e (patch) | |
| tree | 24e81f55b1f4e25aab794d8912b82e61e074f68c | |
| parent | 39f47a65dd262d3836da9d475b1033a38c50db8b (diff) | |
call_reestablishment.ladderneels/re-est
Change-Id: I4da8b8b37a874975f4eb1e633bc114e606b27f1e
| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | doc/sequence_charts/call_reestablishment.ladder | 36 |
2 files changed, 38 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore index eaff7cd47..8c857c317 100644 --- a/.gitignore +++ b/.gitignore @@ -75,3 +75,5 @@ doc/manuals/common doc/manuals/build contrib/osmo-msc.spec + +doc/sequence_charts/call_reestablishment.msc diff --git a/doc/sequence_charts/call_reestablishment.ladder b/doc/sequence_charts/call_reestablishment.ladder new file mode 100644 index 000000000..ccf834622 --- /dev/null +++ b/doc/sequence_charts/call_reestablishment.ladder @@ -0,0 +1,36 @@ +{hscale=2} +ms = MS +cell1 = Cell 1 (BTS+BSC) +cell0 = Cell 0 (BTS+BSC) +msc = MSC + +ms () msc Call Re-Establishment +ms [] msc Ongoing voice call: MM is established + +... + +ms ->< cell0 radio link fails +ms ><- cell0 + +msc <> . Keep MM until timeout + +ms -> cell1 Channel Required +ms <- cell1 Immediate Assignment +ms -> cell1 Complete Layer3 +cell1 -> msc Complete Layer3: + CM Re-Establishment Request + +cell0 <- msc Clear Command +cell0 -> msc Clear Complete + +cell1 <- msc Authentication Request +cell1 -> msc Authentication Response + +cell1 <- msc Cipher Mode Commad +cell1 -> msc Cipher Mode Complete + +cell1 <- msc Assignment Request + this Assignment ACKs the CM Re-Establishment +ms <- cell1 RR Assignment Command +ms -> cell1 RR Assignment Complete +cell1 -> msc Assignment Complete |