diff options
Diffstat (limited to 'bsc/BSC_Tests.ttcn')
| -rw-r--r-- | bsc/BSC_Tests.ttcn | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn index 754f7b3c..5f77021f 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() ); |