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osmo-ttcn3-hacks
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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
This commit is contained in:
Harald Welte 2019-05-24 21:19:58 +02:00
parent 6833cc9464
commit 3453ab48d6
1 changed files with 129 additions and 2 deletions
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131
bts/BTS_Tests.ttcn
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@ -1269,6 +1269,132 @@ testcase TC_rach_count() runs on test_CT {
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 @@ testcase TC_chopped_ipa_payload() runs on test_CT {
* 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 @@ control {
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() );