pcu: Introduce tests TC_ul_tbf_{1,2}phase_while_dl_ass_pch
Related: OS#5700
Change-Id: I6a72c36265bfdc757180cbb466492ad6bbbf16ad
diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
index 6d17d96..af84821 100644
--- a/pcu/PCU_Tests.ttcn
+++ b/pcu/PCU_Tests.ttcn
@@ -3965,6 +3965,157 @@
f_shutdown(__BFILE__, __LINE__, final := true);
}
+/* Scenario: MS creates a UL TBF and
+ * finishes sending data (CV=0), which is forwarded to SGSN by PCU. PCU acks with
+ * FINAL_ACK=1 (hence UL TBF moves to FINISHED state). Then SGSN answers and PCU
+ * has to assign a DL TBF on PCH. While the network is waiting for the MS to
+ * move to PDCH before transmitting DL data (timer X2002), the MS finds out it
+ * needs to send new UL data and hence sends a RACH request to create a new UL
+ * TBF.
+ * Make sure the the MS is assigned a DL TBF through PACCH in that case even if
+ * no new DL data is received from the SGSN. OS#5700.
+ * This test validates the specific case where the 2nd UL TBF is done through
+ * 1phase-access.
+ */
+testcase TC_ul_tbf_1phase_while_dl_ass_pch() runs on RAW_PCU_Test_CT {
+ var RlcmacDlBlock dl_block;
+ var octetstring data := f_rnd_octstring(10);
+ var uint32_t sched_fn;
+ var uint32_t poll_fn;
+ var uint32_t dl_fn;
+ var GprsMS ms;
+ timer T;
+ var octetstring payload;
+
+ /* Initialize NS/BSSGP side */
+ f_init_bssgp();
+ /* Initialize GPRS MS side */
+ f_init_gprs_ms();
+ ms := g_ms[0]; /* We only use first MS in this test */
+
+ /* Initialize the PCU interface abstraction */
+ f_init_raw(testcasename(), ts_PCUIF_INFO_default(c_PCUIF_Flags_noMCS));
+
+ /* Establish BSSGP connection to the PCU */
+ f_bssgp_establish();
+ f_bssgp_client_llgmm_assign(TLLI_UNUSED, ms.tlli);
+
+ /* Establish an Uplink TBF */
+ f_ms_establish_ul_tbf(ms);
+
+ /* Send one UL block (with TLLI since we are in One-Phase Access
+ contention resolution) and make sure it is ACKED fine. */
+ payload := f_rnd_octstring(f_ultbf_payload_fill_length(ms.ul_tbf, true));
+ dl_fn := f_rx_rlcmac_dl_block_exp_dummy(dl_block);
+ f_ms_tx_ul_data_block(ms, payload, cv := 1, with_tlli := true, fn := f_next_pdch_block(dl_fn));
+
+ f_rx_rlcmac_dl_block_exp_ack_nack(dl_block, sched_fn);
+ payload := f_rnd_octstring(f_ultbf_payload_fill_length(ms.ul_tbf, false));
+ f_ms_tx_ul_data_block(ms, payload, cv := 0);
+ f_rx_rlcmac_dl_block_exp_ack_nack(dl_block, sched_fn);
+
+ /* 1 UL block should be received in SGSN */
+ BSSGP[0].receive(tr_BSSGP_UL_UD(ms.tlli, mp_gb_cfg.bvc[0].cell_id));
+ /* Now SGSN sends some DL data, PCU will page on CCCH (PCH) */
+ BSSGP[0].send(ts_BSSGP_DL_UD(ms.tlli, data));
+
+ /* UL ACK/NACK sets poll+rrbp requesting PACKET CONTROL ACK */
+ f_ms_tx_ul_block(ms, ts_RLCMAC_CTRL_ACK(ms.tlli), sched_fn);
+ f_ms_exp_dl_tbf_ass_ccch(ms, PCU_IF_SAPI_PCH);
+
+ /* Now the PCU is waiting for the MS to move to PDCH in order to send data to it (timer X2002).
+ * The MS decides it want to send new Ul TBF so it send RACH req to ask for it: */
+ f_ms_establish_ul_tbf(ms);
+
+ /* Send one UL block (with TLLI since we are in One-Phase Access
+ * contention resolution) and make sure it is ACKED fine. */
+ payload := f_rnd_octstring(f_ultbf_payload_fill_length(ms.ul_tbf, true));
+ dl_fn := f_rx_rlcmac_dl_block_exp_dummy(dl_block);
+ f_ms_tx_ul_data_block(ms, payload, cv := 1, with_tlli := true, fn := f_next_pdch_block(dl_fn));
+
+ /* UL ACK/NACK sets poll+rrbp requesting PACKET CONTROL ACK */
+ f_rx_rlcmac_dl_block_exp_ack_nack(dl_block, sched_fn);
+
+ /* The PCU considers the MS to have gone over Contention Resolution
+ * after having sent the first UL ACK/NACK to it, hence next it will try to
+ * assign the DL-TBF to send the data it received from the SGSN previously: */
+ f_ms_rx_pkt_ass_pacch(ms, poll_fn, tr_RLCMAC_DL_PACKET_ASS);
+ /* the MS ACKs the PKT_DL_ASS: */
+ f_ms_tx_ul_block(ms, ts_RLCMAC_CTRL_ACK(ms.tlli), poll_fn);
+
+ /* We should finally receive the DL-data that was received previously from the SGSN: */
+ f_rx_rlcmac_dl_block_exp_data(dl_block, dl_fn, data, 0);
+
+ f_shutdown(__BFILE__, __LINE__, final := true);
+}
+
+/* Same as TC_ul_tbf_2phase_while_dl_ass_pch, but this test validates the
+ * specific case where the 2nd UL TBF is done through 2phase-access. */
+testcase TC_ul_tbf_2phase_while_dl_ass_pch() runs on RAW_PCU_Test_CT {
+ var RlcmacDlBlock dl_block;
+ var octetstring data := f_rnd_octstring(10);
+ var uint32_t sched_fn;
+ var uint32_t poll_fn;
+ var uint32_t dl_fn;
+ var GprsMS ms;
+ timer T;
+ var octetstring payload;
+ var PollFnCtx pollctx;
+
+ /* Initialize NS/BSSGP side */
+ f_init_bssgp();
+ /* Initialize GPRS MS side */
+ f_init_gprs_ms();
+ ms := g_ms[0]; /* We only use first MS in this test */
+
+ /* Initialize the PCU interface abstraction */
+ f_init_raw(testcasename(), ts_PCUIF_INFO_default(c_PCUIF_Flags_noMCS));
+
+ /* Establish BSSGP connection to the PCU */
+ f_bssgp_establish();
+ f_bssgp_client_llgmm_assign(TLLI_UNUSED, ms.tlli);
+
+ /* Establish an Uplink TBF */
+ f_ms_establish_ul_tbf(ms);
+
+ /* Send one UL block (with TLLI since we are in One-Phase Access
+ contention resolution) and make sure it is ACKED fine. */
+ payload := f_rnd_octstring(f_ultbf_payload_fill_length(ms.ul_tbf, true));
+ dl_fn := f_rx_rlcmac_dl_block_exp_dummy(dl_block);
+ f_ms_tx_ul_data_block(ms, payload, cv := 1, with_tlli := true, fn := f_next_pdch_block(dl_fn));
+
+ f_rx_rlcmac_dl_block_exp_ack_nack(dl_block, sched_fn);
+ payload := f_rnd_octstring(f_ultbf_payload_fill_length(ms.ul_tbf, false));
+ f_ms_tx_ul_data_block(ms, payload, cv := 0);
+ f_rx_rlcmac_dl_block_exp_ack_nack(dl_block, sched_fn);
+
+ /* 1 UL block should be received in SGSN */
+ BSSGP[0].receive(tr_BSSGP_UL_UD(ms.tlli, mp_gb_cfg.bvc[0].cell_id));
+ /* Now SGSN sends some DL data, PCU will page on CCCH (PCH) */
+ BSSGP[0].send(ts_BSSGP_DL_UD(ms.tlli, data));
+
+ /* UL ACK/NACK sets poll+rrbp requesting PACKET CONTROL ACK */
+ f_ms_tx_ul_block(ms, ts_RLCMAC_CTRL_ACK(ms.tlli), sched_fn);
+ f_ms_exp_dl_tbf_ass_ccch(ms, PCU_IF_SAPI_PCH);
+
+ /* Now the PCU is waiting for the MS to move to PDCH in order to send data to it (timer X2002).
+ * The MS decides it want to send new Ul TBF so it send RACH req to ask for it: */
+ pollctx := f_ms_establish_ul_tbf_2phase_access(ms, ts_RlcMacUlCtrl_PKT_RES_REQ(ms.tlli, ms_racap_gprs_def));
+
+ /* Pkt Uplink Assignment above sets poll+rrbp requesting PACKET CONTROL ACK */
+ f_ms_tx_ul_block(ms, ts_RLCMAC_CTRL_ACK(ms.tlli), pollctx.fn, nr := pollctx.tstrxbts);
+
+ /* Now that MS seized the UL-TBF, PCU sends DL-TBF Assignment on PACCH */
+ f_ms_rx_pkt_ass_pacch(ms, poll_fn, tr_RLCMAC_DL_PACKET_ASS);
+ /* the MS ACKs the PKT_DL_ASS: */
+ f_ms_tx_ul_block(ms, ts_RLCMAC_CTRL_ACK(ms.tlli), poll_fn);
+
+ /* We should finally receive the DL-data that was received previously from the SGSN: */
+ f_rx_rlcmac_dl_block_exp_data(dl_block, dl_fn, data, 0);
+
+ f_shutdown(__BFILE__, __LINE__, final := true);
+}
+
private function f_TC_egprs_pkt_chan_req(in EGPRSPktChRequest req,
template GsmRrMessage t_imm_ass := ?,
PCUIF_BurstType bt := BURST_TYPE_1)
@@ -6900,6 +7051,8 @@
execute( TC_dl_egprs_data_no_llc_ui_dummy() );
execute( TC_ul_tbf_finished_pkt_dl_ass_pch() );
+ execute( TC_ul_tbf_1phase_while_dl_ass_pch() );
+ execute( TC_ul_tbf_2phase_while_dl_ass_pch() );
/* EGPRS specific test cases */
execute( TC_egprs_pkt_chan_req_signalling() );