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osmo-ttcn3-hacks
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BTS_Tests.ttcn: add a test case for PTCCH/D and PTCCH/U 

This test case is aimed to verify handling of both PTCCH/U and
PTCCH/D logical channels, recently implemented in [1]. This is
done by sending 16 Access Bursts on PTCCH/U, and then by
sending a random data block on PTCCH/D.

The existing TC_pcu_data_req_ptcch does not cover PTCCH/U, and
moreover involves TBF handling which has nothing to do with
PTCCH. Let's keep it anyway.

[1] I232e5f514fbad2c51daaa59ff516004aba97c8a3

Change-Id: I011ffdfa63b698ce6085968d15ffb4ff4bd23ee5
Related: OS#4102
This commit is contained in:
Vadim Yanitskiy 2019-10-13 15:25:54 +07:00 committed by laforge
parent 20f8700767
commit 8c242f041a
2 changed files with 105 additions and 1 deletions
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90
bts/BTS_Tests.ttcn
View File

@ -4143,6 +4143,7 @@ testcase TC_pcu_data_req_pdtch() runs on test_CT {
f_pcu_to_l1(0, 0, 7, PCU_IF_SAPI_PDTCH, data); //c_PCU_DATA);
}
/* FIXME: PTTCH has nothing to do with TBFs */
testcase TC_pcu_data_req_ptcch() runs on test_CT {
var TfiUsfArr tua := f_TfiUsfArrInit();
var octetstring data := '0000'O & f_rnd_octstring(21);
@ -4157,6 +4158,94 @@ testcase TC_pcu_data_req_ptcch() runs on test_CT {
f_pcu_to_l1(0, 0, 7, PCU_IF_SAPI_PTCCH, data);
}
private function f_TC_pcu_ptcch_ul(uint16_t ra)
runs on test_CT {
var template PCUIF_Message pcu_rach_ind;
var PCUIF_send_data sd;
var GsmFrameNumber fn;
timer T;
/* Send an Access Burst on PTCCH/U over the Um-interface */
fn := f_L1CTL_RACH(L1CTL, ra := ra, combined := 0, offset := 0,
chan_nr := ts_RslChanNr_PDCH(7),
link_id := ts_RslLinkID_OSMO_PTCCH(0));
/* TODO: check time-slot and TRX number as soon as we extend the PCU interface */
pcu_rach_ind := tr_PCUIF_RACH_IND(ra := ra, fn := fn, sapi := PCU_IF_SAPI_PTCCH);
/* Expect a RACH.ind on the PCU interface (timeout is one multi-frame) */
T.start(52.0 * 4.615 / 1000.0);
alt {
[] PCU.receive(t_SD_PCUIF(g_pcu_conn_id, pcu_rach_ind)) -> value sd {
log("Rx an Access Burst on the PCU interface: ", sd.data);
setverdict(pass);
T.stop;
}
[] PCU.receive { repeat; }
[] T.timeout {
setverdict(fail, "Timeout waiting for RACH.ind on the PCU interface");
/* Keep going, that's not the end of the world */
}
}
}
testcase TC_pcu_ptcch() runs on test_CT {
var L1ctlDlMessage dl;
var octetstring data;
timer T;
f_init_pcu_test();
f_init_l1ctl();
f_l1_tune(L1CTL);
/* Activate PDCH channel on TS7 */
f_TC_pcu_act_req(0, 0, 7, true);
/* Tune trxcon to that PDCH channel */
L1CTL.send(ts_L1CTL_DM_EST_REQ(arfcn := { false, mp_trx0_arfcn },
chan_nr := valueof(ts_RslChanNr_PDCH(7)),
tsc := 7));
/* Verify PTCCH/U: send several access bursts, make sure they're received */
for (var integer i := 0; i < 16; i := i + 1) {
log("Sending an Access Burst towards the L1CTL interface");
f_TC_pcu_ptcch_ul(oct2int(f_rnd_ra_ps()));
}
/* Generate a random payload for PTCCH/D (23 octets, CS-1) */
data := f_rnd_octstring(23);
/* Verify PTCCH/D: send a random data block, make sure it's received */
log("Sending a PTCCH/D block towards the PCU interface: ", data);
f_pcu_wait_rts_and_data_req(0, 0, 7, PCU_IF_SAPI_PTCCH, data);
/* PTCCH/D period is 2 multi-frames (2 * 52 * 4.615 ms), but
* let's give it more time in case if we miss the beginning. */
T.start(2.0 * 2.0 * 52.0 * 4.615 / 1000.0);
alt {
/* PDCH is considered as traffic in trxcon => expect TRAFFIC.ind */
[] L1CTL.receive(tr_L1CTL_TRAFFIC_IND(chan_nr := t_RslChanNr_PDCH(7),
link_id := tr_RslLinkID_OSMO_PTCCH(?),
frame := data)) -> value dl {
log("Rx PTCCH/D data (traffic) block on L1CTL: ", dl);
setverdict(pass);
T.stop;
}
/* Other PHYs (e.g. virt_phy) may consider PDCH as data => expect DATA.ind */
[] L1CTL.receive(tr_L1CTL_DATA_IND(chan_nr := t_RslChanNr_PDCH(7),
link_id := tr_RslLinkID_OSMO_PTCCH(?),
l2_data := data)) -> value dl {
log("Rx PTCCH/D data block on L1CTL: ", dl);
setverdict(pass);
T.stop;
}
[] L1CTL.receive { repeat; }
[] T.timeout {
setverdict(fail, "Timeout waiting for DATA.ind on L1CTL");
}
}
}
/* Send AGCH from PCU; check it appears on Um side */
testcase TC_pcu_data_req_agch() runs on test_CT {
timer T := 3.0;
@ -6267,6 +6356,7 @@ control {
execute( TC_pcu_deact_req_wrong_ts() );
execute( TC_pcu_ver_si13() );
if (mp_l1_supports_gprs) {
execute( TC_pcu_ptcch() );
execute( TC_pcu_data_req_pdtch() );
execute( TC_pcu_data_req_ptcch() );
execute( TC_pcu_data_req_wrong_bts() );

16
library/GSM_Types.ttcn
View File

@ -158,7 +158,8 @@ module GSM_Types {
/* TS 48.058 9.3.2 Link ID */
type enumerated RslLinkIdC {
FACCH_SDCCH (0),
SACCH (1)
SACCH (1),
OSMO_PTCCH (2) /* Osmocom (trxcon) specific extension */
} with { variant "FIELDLENGTH(2)" };
type enumerated RslSapi0Prio {
@ -195,6 +196,12 @@ module GSM_Types {
sapi := sapi
};
template RslLinkId tr_RslLinkID_OSMO_PTCCH(template GsmSapi sapi) modifies tr_RslLinkId := {
c := OSMO_PTCCH,
na := false,
sapi := sapi
};
template (value) RslLinkId ts_RslLinkID_DCCH(GsmSapi sapi) := {
c := FACCH_SDCCH,
na := false,
@ -209,6 +216,13 @@ module GSM_Types {
sapi := sapi
};
template (value) RslLinkId ts_RslLinkID_OSMO_PTCCH(GsmSapi sapi) := {
c := OSMO_PTCCH,
na := false,
prio := SAPI0_PRIO_NORMAL,
sapi := sapi
};
function f_hex_is_odd_length(hexstring digits) return bitstring {
if (lengthof(digits) rem 2 == 1) {
return '1'B;