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-rw-r--r--bsc/BSC_Tests.ttcn211
-rw-r--r--bsc/expected-results.xml5
-rw-r--r--library/BSSMAP_Templates.ttcn19
3 files changed, 234 insertions, 1 deletions
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 754f7b3..5f77021 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -2274,6 +2274,214 @@ testcase TC_ho_out_of_this_bsc() runs on test_CT {
vc_conn.done;
}
+/* BSC asks for inter-BSC HO, but the MSC decides that it won't happen and
+ * simply never sends a BSSMAP Handover Command. */
+private function f_tc_ho_out_fail_no_msc_response(charstring id) runs on MSC_ConnHdlr {
+ g_pars := valueof(t_def_TestHdlrPars);
+
+ var PDU_BSSAP ass_req := f_gen_ass_req();
+ ass_req.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
+ ass_req.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
+ var template PDU_BSSAP exp_compl := f_gen_exp_compl();
+ f_establish_fully(ass_req, exp_compl);
+
+ f_vty_transceive(BSCVTY, "handover any to arfcn 123 bsic any");
+
+ BSSAP.receive(tr_BSSMAP_HandoverRequired);
+
+ /* osmo-bsc should time out 10 seconds after the handover started.
+ * Let's give it a bit extra. */
+ f_sleep(15.0);
+
+ /* The old lchan and conn should still be active. See that arbitrary L3
+ * is still going through. */
+ var octetstring l3 := '0123456789'O;
+ RSL.send(ts_RSL_DATA_IND(g_chan_nr, valueof(ts_RslLinkID_DCCH(0)), l3));
+ var template PDU_BSSAP exp_data := {
+ discriminator := '1'B,
+ spare := '0000000'B,
+ dlci := '00'O,
+ lengthIndicator := 5,
+ pdu := {
+ dtap := l3
+ }
+ };
+ BSSAP.receive(exp_data);
+ setverdict(pass);
+ f_sleep(1.0);
+}
+testcase TC_ho_out_fail_no_msc_response() runs on test_CT {
+ var MSC_ConnHdlr vc_conn;
+
+ f_init(1, true);
+ f_sleep(1.0);
+
+ vc_conn := f_start_handler(refers(f_tc_ho_out_fail_no_msc_response));
+ vc_conn.done;
+}
+
+/* BSC asks for inter-BSC HO, receives BSSMAP Handover Command, but MS reports
+ * RR Handover Failure. */
+private function f_tc_ho_out_fail_rr_ho_failure(charstring id) runs on MSC_ConnHdlr {
+ g_pars := valueof(t_def_TestHdlrPars);
+
+ var PDU_BSSAP ass_req := f_gen_ass_req();
+ ass_req.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
+ ass_req.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
+ var template PDU_BSSAP exp_compl := f_gen_exp_compl();
+ f_establish_fully(ass_req, exp_compl);
+
+ f_vty_transceive(BSCVTY, "handover any to arfcn 123 bsic any");
+
+ BSSAP.receive(tr_BSSMAP_HandoverRequired);
+
+ f_sleep(0.5);
+ /* The MSC negotiates Handover Request and Handover Request Ack with
+ * the other BSS and comes back with a BSSMAP Handover Command
+ * containing an RR Handover Command coming from the target BSS... */
+
+ var PDU_ML3_NW_MS rr_ho_cmd := valueof(ts_RR_HandoverCommand);
+ log("Remote cell's RR Handover Command passed through as L3 Info: ", rr_ho_cmd);
+ var octetstring rr_ho_cmd_enc := enc_PDU_ML3_NW_MS(rr_ho_cmd);
+ log("Remote cell's RR Handover Command passed through as L3 Info, encoded: ", rr_ho_cmd_enc);
+ BSSAP.send(ts_BSSMAP_HandoverCommand(rr_ho_cmd_enc));
+
+ /* expect the Handover Command to go out on RR */
+ var RSL_Message rsl_ho_cmd
+ RSL.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, ?)) -> value rsl_ho_cmd;
+ log("RSL Data Req went out to first BTS: ", rsl_ho_cmd);
+ var RSL_IE_Body rsl_ho_cmd_l3;
+ if (not f_rsl_find_ie(rsl_ho_cmd, RSL_IE_L3_INFO, rsl_ho_cmd_l3)) {
+ log("RSL message contains no L3 Info IE, expected RR Handover Command");
+ setverdict(fail);
+ } else {
+ log("Found L3 Info: ", rsl_ho_cmd_l3);
+ if (rsl_ho_cmd_l3.l3_info.payload != rr_ho_cmd_enc) {
+ log("FAIL: the BSC sent out a different L3 Info, not matching the RR Handover Command the other BSS forwarded.");
+ setverdict(fail);
+ } else {
+ log("Success: the BSC sent out the same RR Handover Command the other BSS forwarded.");
+ setverdict(pass);
+ }
+ }
+
+ f_sleep(0.2);
+ f_rsl_send_l3(ts_RRM_HandoverFailure('00'O));
+
+ /* Should tell the MSC about the failure */
+ BSSAP.receive(tr_BSSMAP_HandoverFailure);
+
+ f_sleep(1.0);
+
+ /* The old lchan and conn should still be active. See that arbitrary L3
+ * is still going through. */
+ var octetstring l3 := '0123456789'O;
+ RSL.send(ts_RSL_DATA_IND(g_chan_nr, valueof(ts_RslLinkID_DCCH(0)), l3));
+ var template PDU_BSSAP exp_data := {
+ discriminator := '1'B,
+ spare := '0000000'B,
+ dlci := '00'O,
+ lengthIndicator := 5,
+ pdu := {
+ dtap := l3
+ }
+ };
+ BSSAP.receive(exp_data);
+ setverdict(pass);
+ f_sleep(1.0);
+
+ setverdict(pass);
+ f_sleep(1.0);
+}
+testcase TC_ho_out_fail_rr_ho_failure() runs on test_CT {
+ var MSC_ConnHdlr vc_conn;
+
+ f_init(1, true);
+ f_sleep(1.0);
+
+ vc_conn := f_start_handler(refers(f_tc_ho_out_fail_rr_ho_failure));
+ vc_conn.done;
+}
+
+/* BSC asks for inter-BSC HO, receives BSSMAP Handover Command, but MS reports
+ * RR Handover Failure. */
+private function f_tc_ho_out_fail_no_ho_detect(charstring id) runs on MSC_ConnHdlr {
+ g_pars := valueof(t_def_TestHdlrPars);
+
+ var PDU_BSSAP ass_req := f_gen_ass_req();
+ ass_req.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
+ ass_req.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
+ var template PDU_BSSAP exp_compl := f_gen_exp_compl();
+ f_establish_fully(ass_req, exp_compl);
+
+ f_vty_transceive(BSCVTY, "handover any to arfcn 123 bsic any");
+
+ BSSAP.receive(tr_BSSMAP_HandoverRequired);
+
+ f_sleep(0.5);
+ /* The MSC negotiates Handover Request and Handover Request Ack with
+ * the other BSS and comes back with a BSSMAP Handover Command
+ * containing an RR Handover Command coming from the target BSS... */
+
+ var PDU_ML3_NW_MS rr_ho_cmd := valueof(ts_RR_HandoverCommand);
+ log("Remote cell's RR Handover Command passed through as L3 Info: ", rr_ho_cmd);
+ var octetstring rr_ho_cmd_enc := enc_PDU_ML3_NW_MS(rr_ho_cmd);
+ log("Remote cell's RR Handover Command passed through as L3 Info, encoded: ", rr_ho_cmd_enc);
+ BSSAP.send(ts_BSSMAP_HandoverCommand(rr_ho_cmd_enc));
+
+ /* expect the Handover Command to go out on RR */
+ var RSL_Message rsl_ho_cmd
+ RSL.receive(tr_RSL_DATA_REQ(g_chan_nr, ?, ?)) -> value rsl_ho_cmd;
+ log("RSL Data Req went out to first BTS: ", rsl_ho_cmd);
+ var RSL_IE_Body rsl_ho_cmd_l3;
+ if (not f_rsl_find_ie(rsl_ho_cmd, RSL_IE_L3_INFO, rsl_ho_cmd_l3)) {
+ log("RSL message contains no L3 Info IE, expected RR Handover Command");
+ setverdict(fail);
+ } else {
+ log("Found L3 Info: ", rsl_ho_cmd_l3);
+ if (rsl_ho_cmd_l3.l3_info.payload != rr_ho_cmd_enc) {
+ log("FAIL: the BSC sent out a different L3 Info, not matching the RR Handover Command the other BSS forwarded.");
+ setverdict(fail);
+ } else {
+ log("Success: the BSC sent out the same RR Handover Command the other BSS forwarded.");
+ setverdict(pass);
+ }
+ }
+
+ /* The MS never shows up on the remote BSS. Eventually the BSC times
+ * out and we run into 3GPP TS 48.008 3.1.5.3.3 "Abnormal Conditions":
+ * RR should be released and Clear Request should go to the MSC. */
+
+ var MgcpCommand mgcp;
+ interleave {
+ [] RSL.receive(tr_RSL_MsgTypeD(RSL_MT_RF_CHAN_REL)) {
+ log("Got RF Chan Rel");
+ RSL.send(ts_RSL_RF_CHAN_REL_ACK(g_chan_nr));
+ }
+ [] BSSAP.receive(tr_BSSMAP_ClearRequest) {
+ log("Got BSSMAP Clear Request");
+ }
+ [] MGCP.receive(tr_DLCX()) -> value mgcp {
+ log("Got first DLCX: ", mgcp);
+ }
+ [] MGCP.receive(tr_DLCX()) -> value mgcp {
+ log("Got second DLCX: ", mgcp);
+ }
+ }
+
+ setverdict(pass);
+ f_sleep(1.0);
+}
+testcase TC_ho_out_fail_no_ho_detect() runs on test_CT {
+ var MSC_ConnHdlr vc_conn;
+
+ f_init(1, true);
+ f_sleep(1.0);
+
+ vc_conn := f_start_handler(refers(f_tc_ho_out_fail_no_ho_detect));
+ vc_conn.done;
+}
+
private function f_tc_ho_into_this_bsc(charstring id) runs on MSC_ConnHdlr {
/* Hack: the proper way would be to wait for the BSSMAP Handover Request ACK and extract the
* actual assigned chan_nr from its L3 (RR Handover Command) message. But osmo-bsc starts acting
@@ -2847,6 +3055,9 @@ control {
execute( TC_ho_int() );
execute( TC_ho_out_of_this_bsc() );
+ execute( TC_ho_out_fail_no_msc_response() );
+ execute( TC_ho_out_fail_rr_ho_failure() );
+ execute( TC_ho_out_fail_no_ho_detect() );
execute( TC_ho_into_this_bsc() );
execute( TC_bssap_rlsd_does_not_cause_bssmap_reset() );
diff --git a/bsc/expected-results.xml b/bsc/expected-results.xml
index 64d0444..cd808d8 100644
--- a/bsc/expected-results.xml
+++ b/bsc/expected-results.xml
@@ -1,5 +1,5 @@
<?xml version="1.0"?>
-<testsuite name='BSC_Tests' tests='91' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
+<testsuite name='BSC_Tests' tests='94' failures='0' errors='0' skipped='0' inconc='0' time='MASKED'>
<testcase classname='BSC_Tests' name='TC_ctrl_msc_connection_status' time='MASKED'/>
<testcase classname='BSC_Tests' name='TC_ctrl_msc0_connection_status' time='MASKED'/>
<testcase classname='BSC_Tests' name='TC_ctrl' time='MASKED'/>
@@ -70,6 +70,9 @@
<testcase classname='BSC_Tests' name='TC_err_84_unknown_msg' time='MASKED'/>
<testcase classname='BSC_Tests' name='TC_ho_int' time='MASKED'/>
<testcase classname='BSC_Tests' name='TC_ho_out_of_this_bsc' time='MASKED'/>
+ <testcase classname='BSC_Tests' name='TC_ho_out_fail_no_msc_response' time='MASKED'/>
+ <testcase classname='BSC_Tests' name='TC_ho_out_fail_rr_ho_failure' time='MASKED'/>
+ <testcase classname='BSC_Tests' name='TC_ho_out_fail_no_ho_detect' time='MASKED'/>
<testcase classname='BSC_Tests' name='TC_ho_into_this_bsc' time='MASKED'/>
<testcase classname='BSC_Tests' name='TC_bssap_rlsd_does_not_cause_bssmap_reset' time='MASKED'/>
<testcase classname='BSC_Tests' name='TC_bssmap_clear_does_not_cause_bssmap_reset' time='MASKED'/>
diff --git a/library/BSSMAP_Templates.ttcn b/library/BSSMAP_Templates.ttcn
index adfcc9e..118168e 100644
--- a/library/BSSMAP_Templates.ttcn
+++ b/library/BSSMAP_Templates.ttcn
@@ -699,6 +699,25 @@ modifies ts_BSSAP_BSSMAP := {
}
}
+template PDU_BSSAP tr_BSSMAP_HandoverFailure modifies tr_BSSAP_BSSMAP := {
+ pdu := {
+ bssmap := {
+ handoverFailure := {
+ messageType := '16'O,
+ cause := ?,
+ rR_Cause := *,
+ circuitPool := *,
+ circuitPoolList := *,
+ gERANClassmark := *,
+ newBSSToOldBSSInfo := *,
+ interSystemInformation := *,
+ talkerPriority := *,
+ codecList := *
+ }
+ }
+ }
+}
+
template PDU_BSSAP ts_BSSMAP_HandoverRequest(
template BSSMAP_IE_CircuitIdentityCode cic := omit,
template BSSMAP_IE_AoIP_TransportLayerAddress aoip_tla := omit,