fixeria has uploaded this change for review. (
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/29629 )
Change subject: pcu: add TC_dl_multislot_tbf_ack_wrong_ts reproducing OS#5696
......................................................................
pcu: add TC_dl_multislot_tbf_ack_wrong_ts reproducing OS#5696
Change-Id: I0c632721e167ae14c0f3d57b08019f0650771df5
Related: OS#5696
---
M pcu/PCU_Tests.ttcn
1 file changed, 67 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks
refs/changes/29/29629/1
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
index 611ca23..504de08 100644
--- a/pcu/PCU_Tests.ttcn
+++ b/pcu/PCU_Tests.ttcn
@@ -4543,6 +4543,72 @@
f_shutdown(__BFILE__, __LINE__, final := true);
}
+/* Reproduce weird behavior explained in OS#5696 */
+testcase TC_dl_multislot_tbf_ack_wrong_ts() runs on RAW_PCU_Test_CT {
+ var octetstring data := f_rnd_octstring(8);
+ const TsTrxBtsNum nr_ts6 := {6, 0, 0, 0};
+ const TsTrxBtsNum nr_ts7 := {7, 0, 0, 0};
+ var GprsMS ms := valueof(t_GprsMS_def);
+ var RlcmacDlBlock dl_block;
+ var uint32_t poll_fn;
+ var uint32_t dl_fn;
+
+ /* Initialize NS/BSSGP side */
+ f_init_bssgp();
+
+ var PCUIF_info_ind info_ind :=
valueof(ts_PCUIF_INFO_default(c_PCUIF_Flags_noMCS));
+ /* Configure both TS6 and TS7 as PDCH to enable multi-slot TBFs */
+ f_PCUIF_PDCHMask_set(info_ind, '00000011'B, 0);
+ f_PCUIF_PDCHMask_set(info_ind, '00000000'B, (1 .. 7));
+ /* Initialize the PCU interface abstraction */
+ f_init_raw(testcasename(), info_ind);
+
+ /* Establish BSSGP connection to the PCU */
+ f_bssgp_establish();
+ f_bssgp_client_llgmm_assign(TLLI_UNUSED, ms.tlli);
+
+ /* Establish an Uplink TBF (assuming TS6) */
+ f_ms_establish_ul_tbf(ms);
+
+ /* (TS6) Send an Uplink block, so this TBF becomes "active" */
+ f_ms_tx_ul_data_block(ms, data, with_tlli := true, nr := nr_ts6);
+
+ /* (TS6) DL ACK/NACK ends contention resolution */
+ f_rx_rlcmac_dl_block_exp_ack_nack(dl_block, poll_fn, nr := nr_ts6);
+
+ /* SGSN sends some DL data, PCU will assign Downlink resource on PACCH
*/
+ BSSGP[0].send(ts_BSSGP_DL_UD(ms.tlli, data));
+
+ /* (TS6) Expect an RLC/MAC block with Packet Downlink Assignment on
PACCH (see 11.2.29) */
+ f_ms_rx_pkt_ass_pacch(ms, poll_fn, tr_RLCMAC_DL_PACKET_ASS, nr :=
nr_ts6);
+ /* Expect a multi-slot TBF including TS6 and TS7 */
+ if (not match(ms.dl_tbf.ass.pacch.timeslot_alloc, '00000011'B)) {
+ setverdict(fail, "Unexpected TIMESLOT_ALLOCATION in Pkt DL
Ass");
+ f_shutdown(__BFILE__, __LINE__);
+ }
+
+ /* Packet Downlink Assignment polls the MS, so we need to ACKnowledge
it.
+ * SE K800i sends a dummy block on TS6 and then the ACK on TS7. */
+ f_ms_tx_ul_block(ms, ts_RLCMAC_UL_DUMMY_CTRL(ms.tlli),
+ poll_fn, wait := false, nr := nr_ts6);
+ f_ms_tx_ul_block(ms, ts_RLCMAC_CTRL_ACK(ms.tlli),
+ poll_fn, wait := false, nr := nr_ts7);
+ BTS.receive(tr_RAW_PCU_EV(TDMA_EV_PDTCH_BLOCK_SENT, { tdma_fn :=
poll_fn }));
+ BTS.receive(tr_RAW_PCU_EV(TDMA_EV_PDTCH_BLOCK_SENT, { tdma_fn :=
poll_fn }));
+
+ if (false) { /* for debugging only */
+ var BTS_PDTCH_Block pdtch_msg;
+ f_pcuif_rx_data_req_pdtch(pdtch_msg, nr := nr_ts6);
+ log("======== (TS6) Rx data: ", pdtch_msg.dl_block);
+ f_pcuif_rx_data_req_pdtch(pdtch_msg, nr := nr_ts7);
+ log("======== (TS7) Rx data: ", pdtch_msg.dl_block);
+ }
+
+ f_rx_rlcmac_dl_block_exp_data(dl_block, dl_fn, data, nr := nr_ts6);
+
+ f_shutdown(__BFILE__, __LINE__, final := true);
+}
+
/* Verify concurrent PDCH use of EGPRS and GPRS (EGPRS dl rlcmac blk is
* downgraded to CS1-4 so that GPRS can read the USF).
* See 3GPP TS 44.060 5.2.4a "Multiplexing of GPRS, EGPRS and EGPRS2 capable
mobile stations"
@@ -6866,6 +6932,7 @@
execute( TC_ul_tbf_reestablish_with_pkt_dl_ack_nack() );
execute( TC_ul_tbf_reestablish_with_pkt_dl_ack_nack_egprs() );
+ execute( TC_dl_multislot_tbf_ack_wrong_ts() );
execute( TC_multiplex_dl_gprs_egprs() );
execute( TC_pcuif_info_ind_subsequent() );
--
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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I0c632721e167ae14c0f3d57b08019f0650771df5
Gerrit-Change-Number: 29629
Gerrit-PatchSet: 1
Gerrit-Owner: fixeria <[email protected]>
Gerrit-MessageType: newchange
