laforge has submitted this change. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/19794 )
Change subject: BSC_Tests: test emergency call preemption
......................................................................
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
---
M bsc/BSC_Tests.ttcn
1 file changed, 44 insertions(+), 0 deletions(-)
Approvals:
laforge: Looks good to me, approved
Jenkins Builder: Verified
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 @@
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 @@
execute( TC_assignment_emerg_setup_allow() );
execute( TC_assignment_emerg_setup_deny_msc() );
execute( TC_assignment_emerg_setup_deny_bts() );
+ execute( TC_emerg_premption() );
+
}
}
--
To view, visit https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/19794
To unsubscribe, or for help writing mail filters, visit
https://gerrit.osmocom.org/settings
Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I7d544680f492cb825d909b86b2e1131ab652df13
Gerrit-Change-Number: 19794
Gerrit-PatchSet: 2
Gerrit-Owner: dexter <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <[email protected]>
Gerrit-MessageType: merged
