Change in osmo-bsc[master]: add test_dyn_ts_favor_static_ts_as_target.ho_vty

neels gerrit-no-reply at lists.osmocom.org
Sun Jul 11 20:24:14 UTC 2021


neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bsc/+/24911 )


Change subject: add test_dyn_ts_favor_static_ts_as_target.ho_vty
......................................................................

add test_dyn_ts_favor_static_ts_as_target.ho_vty

In a discussion about the effect of interference levels, I noticed that
there is not sufficient clarity about how strongly the preference of
static timeslots is ranked. This test helps to show what we have.

Related: SYS#5313
Change-Id: I0911cd74613045d9fbe29d04eaef036d32049b92
---
M tests/handover/handover_tests.ok
A tests/handover/test_dyn_ts_favor_static_ts_as_target.ho_vty
2 files changed, 39 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/11/24911/1

diff --git a/tests/handover/handover_tests.ok b/tests/handover/handover_tests.ok
index a03454d..168ebd6 100644
--- a/tests/handover/handover_tests.ok
+++ b/tests/handover/handover_tests.ok
@@ -32,6 +32,7 @@
 pass test_dyn_ts_congestion_tch_f_vs_tch_h_2.ho_vty
 pass test_dyn_ts_favor_half_used_tch_h_as_target.ho_vty
 pass test_dyn_ts_favor_moving_half_used_tch_h.ho_vty
+pass test_dyn_ts_favor_static_ts_as_target.ho_vty
 pass test_ho_to_better_cell.ho_vty
 pass test_ho_to_better_cell_2.ho_vty
 pass test_hysteresis.ho_vty
diff --git a/tests/handover/test_dyn_ts_favor_static_ts_as_target.ho_vty b/tests/handover/test_dyn_ts_favor_static_ts_as_target.ho_vty
new file mode 100644
index 0000000..c50b007
--- /dev/null
+++ b/tests/handover/test_dyn_ts_favor_static_ts_as_target.ho_vty
@@ -0,0 +1,38 @@
+# If both a static and a dynamic TCH/H (even without pchan switch!) are available, we always prefer static TS.
+create-bts trx-count 1 timeslots c+s4  dyn    TCH/H  dyn    TCH/H  dyn    TCH/H  PDCH
+
+network
+ bts 0
+  channel allocator ascending
+
+set-ts-use    trx 0 0     states *     TCH/-H TCH/-H TCH/-H TCH/-H TCH/-H TCH/-H *
+
+# the dynamic timeslot is already in TCH/H mode, and needs no pchan switch. It appears first in the list, hence it would
+# be used first -- but we prefer using static TS when still available:
+create-ms bts 0 TCH/H AMR
+expect-ts-use trx 0 0     states *     TCH/-H TCH/HH TCH/-H TCH/-H TCH/-H TCH/-H *
+#                                                 ^
+
+# Interference ratings do NOT influence whether a static or dynamic lchan (even without pchan switch) is going to be
+# assigned.
+network
+ bts 0
+  channel allocator avoid-interference 1
+  interference-meas level-bounds -115 -109 -103 -97 -91 -85
+#                                  0    1    2   3   4   5
+
+# Here the dyn TS lchan happens to have less interference. But still the choice to prefer static over dynamic weighs
+# stronger. The static TS with least interference is picked.
+#                                      dyn    TCH/H  dyn    TCH/H  dyn    TCH/H
+expect-ts-use trx 0 0     states *     TCH/-H TCH/HH TCH/-H TCH/-H TCH/-H TCH/-H *
+res-ind trx 0 0 levels           -         4-     --     1-     4-     3-     2- -
+create-ms bts 0 TCH/H AMR
+expect-ts-use trx 0 0     states *     TCH/-H TCH/HH TCH/-H TCH/-H TCH/-H TCH/HH *
+#                                                                             ^
+create-ms bts 0 TCH/H AMR
+expect-ts-use trx 0 0     states *     TCH/-H TCH/HH TCH/-H TCH/HH TCH/-H TCH/HH *
+#                                                               ^
+# now only dynamic TS are left. The one dyn lchan with least interference is picked
+create-ms bts 0 TCH/H AMR
+expect-ts-use trx 0 0     states *     TCH/-H TCH/HH TCH/HH TCH/HH TCH/-H TCH/HH *
+#                                                        ^

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Gerrit-Project: osmo-bsc
Gerrit-Branch: master
Gerrit-Change-Id: I0911cd74613045d9fbe29d04eaef036d32049b92
Gerrit-Change-Number: 24911
Gerrit-PatchSet: 1
Gerrit-Owner: neels <nhofmeyr at sysmocom.de>
Gerrit-MessageType: newchange
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