Harald Welte has uploaded this change for review. (
https://gerrit.osmocom.org/14169
Change subject: bts: Add tests for CCCH LOAD IND (RACH)
......................................................................
bts: Add tests for CCCH LOAD IND (RACH)
Add three BTS_Tests.ttcn test cases for verifying the BTS behavior
regarding CCCH LOAD IND (RACH).
Related: OS#3750
Change-Id: I6c9dee1d7d3eaa218fdce7ebb8e334858aedb736
---
M bts/BTS_Tests.ttcn
1 file changed, 129 insertions(+), 2 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/69/14169/1
diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 0eba242..27ed81c 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -1269,6 +1269,132 @@
Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
}
+private function f_vty_load_ind_thresh(integer period := 10, integer bts_nr :=
0) runs on test_CT {
+ var charstring bts_str := "bts " & int2str(bts_nr);
+ f_vty_config2(BSCVTY, {"network", bts_str}, "ccch
load-indication-threshold " & int2str(period));
+}
+
+/* empirical value: Number of RACH slots per reporting interval (1s) on
combined CCCH */
+private template integer tr_rach_slots_per_interval := (90 .. 130);
+
+/* Expect 0 RACH load on an idle BTS that has just started up */
+testcase TC_rach_load_idle_thresh0() runs on test_CT {
+ var ASP_RSL_Unitdata rx_ud;
+
+ f_init_vty_bsc();
+ /* send load indications even at 0% load */
+ f_vty_load_ind_thresh(0);
+ f_vty_transceive(BSCVTY, "drop bts connection 0 oml");
+ f_sleep(2.0);
+
+ f_init();
+
+ timer T := 5.0;
+ T.start;
+ alt {
+ []
RSL_CCHAN.receive(tr_RSL_UD(tr_RSL_RACH_LOAD_IND(tr_rach_slots_per_interval, 0,
0))) {
+ setverdict(pass);
+ repeat;
+ }
+ [] RSL_CCHAN.receive(tr_RSL_UD(tr_RSL_RACH_LOAD_IND(?, ?, ?))) -> value
rx_ud {
+ setverdict(fail, "Unexpected RACH LOAD IND: ", rx_ud);
+ repeat;
+ }
+ [] RSL_CCHAN.receive {
+ repeat;
+ }
+ [] T.timeout { }
+ }
+
+ f_vty_load_ind_thresh(10);
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
+
+/* Expect no RACH load indications on an idle BTS that has just started up
(default threshold 10%) */
+testcase TC_rach_load_idle_below_thresh() runs on test_CT {
+ var ASP_RSL_Unitdata rx_ud;
+
+ f_init_vty_bsc();
+ f_init();
+
+ timer T := 5.0;
+ T.start;
+ alt {
+ [] RSL_CCHAN.receive(tr_RSL_UD(tr_RSL_RACH_LOAD_IND(?, ?, ?))) -> value
rx_ud {
+ setverdict(fail, "Unexpected RACH LOAD IND: ", rx_ud);
+ repeat;
+ }
+ [] RSL_CCHAN.receive {
+ repeat;
+ }
+ [] T.timeout {
+ setverdict(pass);
+ }
+ }
+
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
+
+/* Expect 0 RACH load on an idle BTS that has just started up */
+testcase TC_rach_load_count() runs on test_CT {
+ var ASP_RSL_Unitdata rx_ud;
+ var integer load_access_count := 0;
+
+ f_init_vty_bsc();
+ /* send load indications even at 0% load */
+ f_vty_load_ind_thresh(0);
+ f_vty_transceive(BSCVTY, "drop bts connection 0 oml");
+ f_sleep(2.0);
+ f_init();
+
+ f_init_l1ctl();
+ f_sleep(1.0);
+ f_l1_tune(L1CTL);
+
+ var GsmFrameNumber fn_last := 0;
+ for (var integer i := 0; i < 1000; i := i+1) {
+ var OCT1 ra := f_rnd_ra_cs();
+ var GsmFrameNumber fn := f_L1CTL_RACH(L1CTL, oct2int(ra));
+ if (fn == fn_last) {
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Two
RACH in same FN?!?");
+ }
+ fn_last := fn;
+ }
+
+ timer T := 5.0;
+ T.start;
+ alt {
+ []
RSL_CCHAN.receive(tr_RSL_UD(tr_RSL_RACH_LOAD_IND(tr_rach_slots_per_interval, ?,
?)))
+
-> value rx_ud {
+ var RSL_IE_Body ie;
+ f_rsl_find_ie(rx_ud.rsl, RSL_IE_RACH_LOAD, ie);
+ load_access_count := load_access_count +
ie.rach_load.access_count;
+ if (ie.rach_load.busy_count < ie.rach_load.access_count) {
+ setverdict(fail, "Access count cannot be < Busy count");
+ }
+ repeat;
+ }
+ [] RSL_CCHAN.receive(tr_RSL_UD(tr_RSL_RACH_LOAD_IND(?, ?, ?))) -> value
rx_ud {
+ setverdict(fail, "Unexpected RACH LOAD IND: ", rx_ud);
+ repeat;
+ }
+ [] RSL_CCHAN.receive {
+ repeat;
+ }
+ [] T.timeout { }
+ }
+ if (load_access_count == 1000) {
+ setverdict(pass);
+ } else {
+ setverdict(fail, "Load reports state ", load_access_count, "
RACH, but we sent 1000");
+ }
+
+ f_vty_load_ind_thresh(10);
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__);
+}
+
+
+
private function f_main_trxc_connect() runs on test_CT {
map(self:BTS_TRXC, system:BTS_TRXC);
var Result res;
@@ -4636,8 +4762,6 @@
* handover detection
* BS Power Control
* Physical Context
-* CCCH Load Indication for RACH
-* SMS Broadcast Req / Cmd / CBCH LOad Ind
* RF resource ind
* error handling
** IE duplicated?
@@ -4664,6 +4788,9 @@
execute( TC_rach_content() );
execute( TC_rach_count() );
execute( TC_rach_max_ta() );
+ execute( TC_rach_load_idle_thresh0() );
+ execute( TC_rach_load_idle_below_thresh() );
+ execute( TC_rach_load_count() );
execute( TC_meas_res_sign_tchf() );
execute( TC_meas_res_sign_tchh() );
execute( TC_meas_res_sign_sdcch4() );
--
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I6c9dee1d7d3eaa218fdce7ebb8e334858aedb736
Gerrit-Change-Number: 14169
Gerrit-PatchSet: 1
Gerrit-Owner: Harald Welte <[email protected]>
