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bsc: add TC_reassignment_fr() 

osmo-bsc does now support intra-cell re-Assignment of lchans with active
voice. Test re-Assignment of TCH/F, triggered by VTY command.

Change-Id: I05fecefb9d6f9f23a0362f133170bca4da92e308
This commit is contained in:
Neels Hofmeyr 2021-04-28 22:23:36 +00:00
parent 87857ecf37
commit d2d9f3350f
1 changed files with 89 additions and 0 deletions
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89
bsc/BSC_Tests.ttcn
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@ -8671,6 +8671,93 @@ testcase TC_refuse_chan_act_to_vamos() runs on test_CT {
}
}
private function f_TC_reassignment_codec(charstring id) runs on MSC_ConnHdlr {
/* First fully set up a speech lchan */
f_TC_assignment_codec(id);
/* Trigger re-assignment to another lchan */
var AssignmentState assignment_st := valueof(ts_AssignmentStateInit);
/* Re-Assignment should tell the MGW endpoint the new lchan's RTP address and port, so expecting to see exactly
* one MDCX on MGCP. */
g_media.mgcp_conn[0].mdcx_seen_exp := g_media.mgcp_conn[0].mdcx_seen_exp + 1;
/* The new lchan will see all-new IPAC_CRCX and IPAC_MDCX messages telling the BTS the same RTP address and port
* as the old lchan used. */
g_media.bts.ipa_crcx_seen := false;
g_media.bts.ipa_mdcx_seen := false;
/* Send different BTS side RTP port number for the new lchan */
g_media.bts.bts.port_nr := 4223;
f_rslem_register(0, valueof(ts_RslChanNr_Bm(2))); /* <-- FIXME: can we somehow infer the timeslot that will be used? */
/* Trigger re-assignment. */
f_vty_transceive(BSCVTY, "bts 0 trx 0 timeslot " & int2str(g_chan_nr.tn) & " sub-slot 0 assignment");
timer T := 5.0;
T.start;
alt {
[] as_assignment(assignment_st);
[] as_Media();
[] T.timeout {
break;
}
}
if (not assignment_st.assignment_done) {
setverdict(fail, "Assignment did not complete");
mtc.stop;
}
f_check_mgcp_expectations()
setverdict(pass);
f_sleep(2.0);
log("show lchan summary: ", f_vty_transceive_ret(BSCVTY, "show lchan summary"));
/* Instruct BSC to clear channel */
var BssmapCause cause := 0;
BSSAP.send(ts_BSSMAP_ClearCommand(cause));
interleave {
[] MGCP.receive(tr_DLCX) {}
[] MGCP.receive(tr_DLCX) {}
[] RSL.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, decmatch tr_RRM_RR_RELEASE)) {}
[] RSL.receive(tr_RSL_DEACT_SACCH(g_chan_nr)) {}
[] RSL.receive(tr_RSL_MsgTypeD(RSL_MT_RF_CHAN_REL)) {
RSL.send(ts_RSL_RF_CHAN_REL_ACK(g_chan_nr));
}
[] BSSAP.receive(tr_BSSMAP_ClearComplete) {
BSSAP.send(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_REQ);
}
}
f_sleep(0.5);
}
testcase TC_reassignment_fr() runs on test_CT {
var TestHdlrParams pars := f_gen_test_hdlr_pars();
var MSC_ConnHdlr vc_conn;
f_init(1, true);
f_sleep(1.0);
f_ctrs_bsc_and_bts_init();
pars.ass_codec_list := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
vc_conn := f_start_handler(refers(f_TC_reassignment_codec), pars);
vc_conn.done;
/* from f_establish_fully() */
f_ctrs_bsc_and_bts_add(0, "assignment:attempted");
f_ctrs_bsc_and_bts_add(0, "assignment:completed");
/* from re-assignment */
f_ctrs_bsc_and_bts_add(0, "assignment:attempted");
f_ctrs_bsc_and_bts_add(0, "assignment:completed");
f_ctrs_bsc_and_bts_verify();
f_shutdown_helper();
}
control {
/* CTRL interface testing */
@ -8935,6 +9022,8 @@ control {
execute( TC_refuse_chan_act_to_vamos() );
execute( TC_refuse_mode_modif_to_vamos() );
execute( TC_reassignment_fr() );
}
}