bsc: Introduce test TC_dyn_ts_sdcch8_all_subslots_used
Related: OS#5278
Related: SYS#5309
Change-Id: Iee37eef2012ce2c2e2f0a0db4c26abb75a947d84
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index cebd634..ee4dac2 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -1672,6 +1672,37 @@
return dt;
}
+/* Like f_est_dchan(), but for the first lchan of a dynamic timeslot: first ACK the deactivation of PDCH. */
+function f_est_dchan_dyn(OCT1 ra, GsmFrameNumber fn, octetstring l3)
+runs on test_CT return DchanTuple {
+ var BSSAP_N_CONNECT_ind rx_c_ind;
+ var DchanTuple dt;
+
+ /* Send CHAN RQD */
+ var RSL_Message rx_rsl;
+ f_ipa_tx(0, ts_RSL_CHAN_RQD(ra, fn));
+
+ /* The dyn TS first deactivates PDCH */
+ rx_rsl := f_exp_ipa_rx(0, tr_RSL_MsgTypeD(RSL_MT_RF_CHAN_REL), T3101_MAX);
+ dt.rsl_chan_nr := rx_rsl.ies[0].body.chan_nr;
+ f_ipa_tx(0, ts_RSL_RF_CHAN_REL_ACK(dt.rsl_chan_nr));
+
+ rx_rsl := f_exp_ipa_rx(0, tr_RSL_MsgTypeD(RSL_MT_CHAN_ACTIV));
+ dt.rsl_chan_nr := rx_rsl.ies[0].body.chan_nr;
+
+ /* Now activates the signalling channel */
+ f_ipa_tx(0, ts_RSL_CHAN_ACT_ACK(dt.rsl_chan_nr, fn+10));
+ rx_rsl := f_exp_ipa_rx(0, tr_RSL_IMM_ASSIGN(0));
+
+ f_ipa_tx(0, ts_RSL_EST_IND(dt.rsl_chan_nr, valueof(ts_RslLinkID_DCCH(0)), l3));
+
+ BSSAP.receive(tr_BSSAP_CONNECT_ind(?, ?, tr_BSSMAP_ComplL3(l3))) -> value rx_c_ind;
+ dt.sccp_conn_id := rx_c_ind.connectionId;
+ BSSAP.send(ts_BSSAP_CONNECT_res(dt.sccp_conn_id));
+
+ return dt;
+}
+
/* expect RF CAN REL from BTS, acknowledge it and clear the MSC side */
private function f_exp_chan_rel_and_clear(DchanTuple dt, integer bts_nr := 0) runs on test_CT {
var RSL_Message rx_rsl;
@@ -7241,6 +7272,53 @@
f_shutdown_helper();
}
+/* Validate all 8 subslots of a dynamics TS configured as SDCCH8 are used */
+testcase TC_dyn_ts_sdcch8_all_subslots_used() runs on test_CT {
+ var ASP_RSL_Unitdata rsl_ud;
+ var integer i;
+ var integer chreq_total, chreq_nochan;
+
+ f_init_vty();
+ for (i := 1; i < 8; i := i + 1) {
+ if (i == 2) {
+ f_ts_set_chcomb(0, 0, i, "TCH/F_TCH/H_SDCCH8_PDCH");
+ } else {
+ f_ts_set_chcomb(0, 0, i, "PDCH");
+ }
+ }
+ f_vty_transceive(BSCVTY, "drop bts connection 0 oml");
+
+ f_init(1);
+
+ /* The dyn TS want to activate PDCH mode, ACK that. */
+ var RslChannelNr chan_nr;
+ chan_nr := valueof(t_RslChanNr_PDCH(2));
+ f_exp_ipa_rx(0, tr_RSL_CHAN_ACT_PDCH(chan_nr, ?));
+ f_ipa_tx(0, ts_RSL_CHAN_ACT_ACK(chan_nr, 2342));
+
+ f_sleep(1.0);
+
+ /* Exhaust all dedicated SDCCH lchans.
+ /* GSM 44.018 Table 9.1.8.2:
+ * RA = '13'O -> Establishment cause = 0001xxxx (MS dual rate capable and asks for "SDCCH").
+ */
+ for (i := 0; i < NUM_SDCCH_PER_BTS; i := i+1) {
+ f_est_dchan('13'O, NUM_SDCCH_PER_BTS + i, '00010203040506'O);
+ }
+
+ /* Only the dyn TS is still available. Its first lchan gets converted to SDCCH8 */
+ f_est_dchan_dyn('33'O, NUM_SDCCH_PER_BTS + i, '00010203040506'O);
+ /* Also occupy the seven other SDCCH of the dyn TS */
+ for (i := 0; i < 7; i := i+1) {
+ f_est_dchan('33'O, NUM_SDCCH_PER_BTS + i, '00010203040506'O);
+ }
+
+ /* clean up config */
+ f_ts_reset_chcomb(0);
+
+ f_shutdown_helper();
+}
+
/* Test Osmocom dyn TS SDCCH8 activation / deactivation: If activating dyn TS as
SDCCH8 would end up in having no free TCH, then BSC should decide to activate
it as TCH directly instead. SYS#5309. */
@@ -10517,6 +10595,7 @@
execute( TC_dyn_pdch_osmo_act_nack() );
if (mp_enable_dyn_sdcch8_test) {
execute( TC_dyn_ts_sdcch8_act_deact() );
+ execute( TC_dyn_ts_sdcch8_all_subslots_used() );
execute( TC_dyn_ts_sdcch8_tch_call_act_deact() );
execute( TC_dyn_ts_sdcch8_act_nack() );
}