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authorPhilipp Maier <pmaier@sysmocom.de>2020-08-13 18:48:27 +0200
committerlaforge <laforge@osmocom.org>2020-08-24 07:36:34 +0000
commit8281200718bd60a31d38c820c560d1824a8a8618 (patch)
treeaff7573f7e449fe6f582811313dcf6e1251a91a5 /bsc
parentd8051724ff41faa15ac8535aac71e1a95934fe0f (diff)
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
Diffstat (limited to 'bsc')
-rw-r--r--bsc/BSC_Tests.ttcn44
1 files changed, 44 insertions, 0 deletions
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 0e76476..61b700c 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -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() );
+
}
}