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osmo-ttcn3-hacks
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BSC_Tests: test emergency call preemption 

Fill all channels of the BTS and then try to do a channel request for an
emergency call. Osmo-bsc should pick one of the TCH channels and release
it so that there is room for the emergency call.

Change-Id: I7d544680f492cb825d909b86b2e1131ab652df13
Related: OS#4549
This commit is contained in:
Philipp Maier 2020-08-13 18:48:27 +02:00 committed by laforge
parent d8051724ff
commit 8281200718
1 changed files with 44 additions and 0 deletions
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44
bsc/BSC_Tests.ttcn
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@ -6285,6 +6285,48 @@ testcase TC_assignment_emerg_setup_deny_bts() runs on test_CT {
vc_conn.done;
}
/* Test what happens when an emergency call arrives while all TCH channels are
* busy, the BSC is expected to terminate one call in favor of the incoming
* emergency call */
testcase TC_emerg_premption() runs on test_CT {
var ASP_RSL_Unitdata rsl_ud;
var integer i;
var integer chreq_total, chreq_nochan;
var RSL_Message rx_rsl;
var RslChannelNr chan_nr;
f_init(1);
f_sleep(1.0);
f_vty_allow_emerg_msc(true);
f_vty_allow_emerg_bts(true, 0);
/* Fill up all channels on the BTS */
chreq_total := f_ctrl_get_ratectr_abs(IPA_CTRL, "bts", 0, "chreq:total");
chreq_nochan := f_ctrl_get_ratectr_abs(IPA_CTRL, "bts", 0, "chreq:no_channel");
for (i := 0; i < NUM_TCHF_PER_BTS + NUM_TCHH_PER_BTS + NUM_SDCCH_PER_BTS; i := i+1) {
chan_nr := f_chreq_act_ack('33'O, i);
}
IPA_RSL[0].clear;
f_ctrl_get_exp_ratectr_abs(IPA_CTRL, "bts", 0, "chreq:total",
chreq_total + NUM_TCHF_PER_BTS + NUM_TCHH_PER_BTS + NUM_SDCCH_PER_BTS);
/* Send Channel request for emegergency call */
f_ipa_tx(0, ts_RSL_CHAN_RQD('A5'O, 23));
/* Expect the BSC to release one (the first) TCH/F on the BTS */
chan_nr := valueof(t_RslChanNr_Bm(1));
f_expect_chan_rel(0, chan_nr, expect_rr_chan_rel := false, expect_rll_rel_req := false);
/* Expect the BSC to send activate/assign the a channel for the emergency call */
rx_rsl := f_exp_ipa_rx(0, tr_RSL_MsgTypeD(RSL_MT_CHAN_ACTIV));
chan_nr := rx_rsl.ies[0].body.chan_nr;
f_ipa_tx(0, ts_RSL_CHAN_ACT_ACK(chan_nr, 33));
rx_rsl := f_exp_ipa_rx(0, tr_RSL_IMM_ASSIGN(0));
setverdict(pass);
}
/* Dyn PDCH todo:
* activate OSMO as TCH/F
* activate OSMO as TCH/H
@ -6506,6 +6548,8 @@ control {
execute( TC_assignment_emerg_setup_allow() );
execute( TC_assignment_emerg_setup_deny_msc() );
execute( TC_assignment_emerg_setup_deny_bts() );
execute( TC_emerg_premption() );
}
}