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osmo-ttcn3-hacks
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PCU_Tests_RAW.ttcn: add test case for UL link quality adaptation 

This change introduces a new test case TC_cs_lqual_ul_tbf, which
is aimed to test the feedback of OsmoPCU on changing link quality
measurements in Uplink Data blocks during an active TBF.

Change-Id: Ia78d93e43a3c41b0b30e70df20a2da31077fd05f
Related: SYS#4607
This commit is contained in:
Vadim Yanitskiy 2019-09-14 20:35:28 +02:00 committed by fixeria
parent 3e1d31808e
commit 0eb26621d8
2 changed files with 102 additions and 1 deletions
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2
library/RLCMAC_Types.ttcn
View File

@ -312,7 +312,7 @@ uint3_t usf) := {
mac_hdr := {
payload_type := (MAC_PT_RLCMAC_NO_OPT, MAC_PT_RLCMAC_OPT),
rrbp:= ?,
rrbp_valid := true,
rrbp_valid := ?,
usf := ?
},
opt := *,

101
pcu/PCU_Tests_RAW.ttcn
View File

@ -21,6 +21,9 @@ import from Osmocom_Types all;
import from GSM_Types all;
import from GSM_RR_Types all;
import from RLCMAC_CSN1_Types all;
import from RLCMAC_Types all;
import from NS_Types all;
import from BSSGP_Types all;
import from Osmocom_Gb_Types all;
@ -596,6 +599,103 @@ testcase TC_ta_rach_imm_ass() runs on RAW_PCU_Test_CT {
}
}
/* Default link quality adaptation (Coding Scheme) ranges:
/* CS1: ... 6 dB, CS2: 5 .. 8 dB, CS3: 7 .. 13 db, CS4: 12 ... dB */
private template integer CS1_lqual_dB_range := (-infinity .. 6);
private template integer CS2_lqual_dB_range := (5 .. 8);
private template integer CS3_lqual_dB_range := (7 .. 13);
private template integer CS4_lqual_dB_range := (12 .. infinity);
testcase TC_cs_lqual_ul_tbf() runs on RAW_PCU_Test_CT {
var PacketUlAssign ul_tbf_ass;
var RlcmacDlBlock dl_block;
var PCUIF_Message pcu_msg;
var GsmRrMessage rr_msg;
var octetstring data;
var boolean ok;
/* Initialize the PCU interface abstraction */
f_init_raw(testcasename());
/* Establish an Uplink TBF */
ok := f_establish_tbf(rr_msg);
if (not ok) {
setverdict(fail, "Failed to establish an Uplink TBF");
mtc.stop;
}
/* Make sure we received an UL TBF Assignment */
/* TODO: check if we got single or dynamic assignment */
if (match(rr_msg, tr_IMM_TBF_ASS(dl := false, rest := tr_IaRestOctets_ULAss(?)))) {
ul_tbf_ass := rr_msg.payload.imm_ass.rest_octets.hh.pa.uldl.ass.ul;
log("Rx Uplink TBF assignment: ", ul_tbf_ass);
setverdict(pass);
} else {
setverdict(fail, "Failed to match UL TBF Assignment");
mtc.stop;
}
var template (value) RlcmacUlBlock ul_data := t_RLCMAC_UL_DATA(
tfi := ul_tbf_ass.dynamic.tfi_assignment,
cv := 15, /* 15 UL blocks to be sent (to be overridden in loop) */
bsn := 0, /* TODO: what should be here? */
blocks := { /* To be generated in loop */ });
/* HACK: patch missing TLLI; otherwise OsmoPCU rejects DATA.req */
ul_data.data.tlli := '00000001'O;
/* 16 UL blocks (0 .. 32 dB, step = 2 dB) */
for (var integer i := 0; i < 16; i := i + 1) {
/* Prepare a new UL block (CV, random payload) */
ul_data.data.mac_hdr.countdown := (15 - i);
ul_data.data.blocks := { valueof(t_RLCMAC_LLCBLOCK(f_rnd_octstring(10))) };
/* Encode the payload of DATA.ind */
data := enc_RlcmacUlBlock(valueof(ul_data));
data := f_pad_oct(data, 23, '00'O); /* CS-1 */
/* Link quality in dB and our CS1-4 expectations */
var integer lqual := i * 2;
/* Enqueue DATA.ind (both TDMA frame and block numbers to be patched) */
log("Sending DATA.ind with link quality (dB): ", lqual);
BTS.send(ts_PCUIF_DATA_IND(bts_nr := 0, trx_nr := 0, ts_nr := 7, block_nr := 0,
sapi := PCU_IF_SAPI_PDTCH, data := data,
fn := 0, arfcn := 871, lqual_cb := lqual * 10));
BTS.receive(tr_RAW_PCU_EV(TDMA_EV_PDTCH_BLOCK_SENT));
/* Enqueue RTS.req, expect DATA.req with UL ACK from the PCU */
BTS.send(ts_PCUIF_RTS_REQ(bts_nr := 0, trx_nr := 0, ts_nr := 7,
sapi := PCU_IF_SAPI_PDTCH, fn := 0,
arfcn := 871, block_nr := 0));
BTS.receive(tr_PCUIF_DATA_REQ(bts_nr := 0, trx_nr := 0, ts_nr := 7,
sapi := PCU_IF_SAPI_PDTCH)) -> value pcu_msg;
dl_block := dec_RlcmacDlBlock(pcu_msg.u.data_req.data);
if (not match(dl_block, tr_RLCMAC_ACK_NACK(ul_tfi := ?, tlli := ?))) {
setverdict(fail, "Failed to match Packet Uplink ACK / NACK");
mtc.stop;
}
log("Rx Packet Uplink ACK / NACK with Channel Coding Command: ",
dl_block.ctrl.payload.u.ul_ack_nack.gprs.ch_coding_cmd);
/* Match the received Channel Coding Command */
var template ChCodingCommand ch_coding;
select (lqual) {
case (CS1_lqual_dB_range) { ch_coding := CH_CODING_CS1; }
case (CS2_lqual_dB_range) { ch_coding := CH_CODING_CS2; }
case (CS3_lqual_dB_range) { ch_coding := CH_CODING_CS3; }
case (CS4_lqual_dB_range) { ch_coding := CH_CODING_CS4; }
}
if (not match(dl_block.ctrl.payload.u.ul_ack_nack.gprs.ch_coding_cmd, ch_coding)) {
setverdict(fail, "Channel Coding does not match our expectations: ", ch_coding);
} else {
setverdict(pass);
}
}
}
control {
execute( TC_ns_reset() );
@ -609,6 +709,7 @@ control {
execute( TC_pcuif_suspend() );
execute( TC_ta_rach_imm_ass() );
execute( TC_cs_lqual_ul_tbf() );
}