[srslte-users] srsUE uplink transmissions fail

[Samie Mostafavi]

Hi,
I am trying to connect my srsUE to an OAI enodeB. I guess there can be some
parameter mismatches here and there. I had problems in the timing but
the are resolved now and the RA procedure happens successfully until the
MAC starts scheduling process.
In this case, UE sends the scheduling request on PUCCH and EnB must respond
on PDCCH (DCI 0 - UL grant). Then, UE has to send PUSCH in response to the
UL grant. However, this process is not going on well:

I get some errors in the scheduling process:
[MAC ] [W] [07909] DL PID 4: Received duplicate TB0. Discarting and
retransmitting ACK (n_retx=2, reset=no)
[MAC ] [W] [07917] DL PID 4: Received duplicate TB0. Discarting and
retransmitting ACK (n_retx=3, reset=no)
[MAC ] [W] [07925] DL PID 4: Received duplicate TB0. Discarting and
retransmitting ACK (n_retx=4, reset=no)

Does anyone know what does this mean?

On the other hand, when the SR is done and passed, UE starts transmitting
data on PUSCH. The log shows that HARQ process is rarely successful. Most
of the responses from EnB are NACK:

[MAC ] [I] [07857] UL 4:  New TX, RV=0, TBS=22
[PHY1] [I] [07856] PUSCH: cc=0, tti_tx=7860, rnti=0x61af, rb=(1,3),
nof_re=432, tbs=22, mod=2, rv=0, sr=no, cqi=15, diff=0, N=7
[RRC ] [I] MEAS:  New measurement earfcn=-1, pci=0 (serving), rsrp=-58.3
dBm.
[PHY1] [I] [07864] PHICH: hi=0, corr=0.7, I_lowest=1, n_dmrs=0, I_phich=0
[MAC ] [I] [07865] UL 4:  Non-Adaptive retx=1, RV=2, TBS=22, HI=NACK
[PHY1] [I] [07864] PUSCH: cc=0, tti_tx=7868, rnti=0x61af, rb=(1,3),
nof_re=432, tbs=22, mod=2, rv=2
[PHY1] [I] [07872] PHICH: hi=0, corr=0.7, I_lowest=1, n_dmrs=0, I_phich=0
[MAC ] [I] [07873] UL 4:  Non-Adaptive retx=2, RV=3, TBS=22, HI=NACK
[PHY1] [I] [07872] PUSCH: cc=0, tti_tx=7876, rnti=0x61af, rb=(1,3),
nof_re=432, tbs=22, mod=2, rv=3
[RRC ] [I] MEAS:  New measurement earfcn=-1, pci=0 (serving), rsrp=-58.3
dBm.
[PHY1] [I] [07880] PHICH: hi=0, corr=0.7, I_lowest=1, n_dmrs=0, I_phich=0
[MAC ] [I] [07881] UL 4:  Non-Adaptive retx=3, RV=1, TBS=22, HI=NACK
[PHY1] [I] [07880] PUSCH: cc=0, tti_tx=7884, rnti=0x61af, rb=(1,3),
nof_re=432, tbs=22, mod=2, rv=1
[PHY1] [I] [07888] PDCCH: cc=0, f=0, cce= 2, L=1, riv=51, mcs=3, rv=0,
ndi=0, tpc_pusch=0, dmrs_cs=0, cqi_request, snr=31.8 dB
[PHY1] [I] [07888] PHICH: hi=0, corr=0.7, I_lowest=1, n_dmrs=0, I_phich=0
[MAC ] [I] [07889] BSR:   Type Padding, Format Long, Value=0,0,0,0

On the EnB log I see these warnings:
[MAC]   [eNB 0][PUSCH 7] CC_id 0 614.3 ULSCH in error in round 0, ul_cqi
229, UE_id 0, RNTI d528
[MAC]   [eNB 0][PUSCH 2] CC_id 0 617.8 ULSCH in error in round 0, ul_cqi
225, UE_id 0, RNTI d528
[MAC]   [eNB 0][PUSCH 2] CC_id 0 618.6 ULSCH in error in round 1, ul_cqi
225, UE_id 0, RNTI d528
[MAC]   [eNB 0][PUSCH 2] CC_id 0 619.4 ULSCH in error in round 2, ul_cqi
229, UE_id 0, RNTI d528
[MAC]   [eNB 0][PUSCH 2] CC_id 0 620.2 ULSCH in error in round 3, ul_cqi
225, UE_id 0, RNTI d528

Attached you can find the log file.
I would really appreciate if anyone can help me though this.

Best,
Seyed Samie Mostafavi
PhD student @ KTH Royal Institute of Technology
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