[srslte-users] Fwd: UE Failed to Attach

Wed Nov 15 10:10:12 UTC 2017

Hi,

When I run "pdsch_enodeb" no error but when I run "./pdsch_ue -i
"pdsch.out" -n 10 -r 1234 -v", it is hanging up with below message.

[INFO]:  Decoding PDSCH SF: 8, RNTI: 0x1234, Mod QPSK, TBS: 4008,
NofSymbols: 3150, NofBitsE: 6300, rv_idx: 0, C_prb=25
[INFO]:  CB#0: cb_len: 4032, rlen: 4032, wp: 0, rp: 0, E: 6300, n_iters=1
[INFO]:  END CB#1: wp: 4032, rp: 6300
[INFO]:  TB decoded OK
[INFO]:  Reading 5760 samples. sf_idx = 9
[INFO]:  Attempting DL decode SFN=0
[INFO]:  Decoded CFI=3 with correlation 32.00, sf_idx=9
[INFO]:  Searching DL C-RNTI in 16 ue locations, 2 formats
 - Resource Allocation Type: Type 0
   + Resource Block Group Size: 2
   + RBG Bitmap: 0x1fff
 - Modulation and coding scheme index: 9
 - HARQ process: 0
 - New data indicator: No
 - Redundancy version: 0
 - TPC command for PUCCH: --
 - PRB Bitmap Assignment 0st slot:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
21, 22, 23, 24,
 - PRB Bitmap Assignment 1st slot:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
21, 22, 23, 24,
 - Number of PRBs: 25
 - Modulation type: QPSK
 - Transport block size: 4008
[INFO]:  CB Segmentation: TBS: 4008, C=1, C+=1 K+=4032, C-=0, K-=0, F=0,
Bp=4032
[INFO]:  Decoding PDSCH SF: 9, RNTI: 0x1234, Mod QPSK, TBS: 4008,
NofSymbols: 3150, NofBitsE: 6300, rv_idx: 0, C_prb=25
[INFO]:  CB#0: cb_len: 4032, rlen: 4032, wp: 0, rp: 0, E: 6300, n_iters=1
[INFO]:  END CB#1: wp: 4032, rp: 6300
[INFO]:  TB decoded OK
*Hangup*

*Regards*
*Sudheer*

On Wed, Nov 15, 2017 at 3:14 PM, Ismael Gomez <
ismael.gomez at softwareradiosystems.com> wrote:

> Check first with lib/examples/pdsch_ue and lib/examples/pdsch_enodeb
> tests. Use spectrum analyzer to make sure signal is good.
>
> With the bladerf, you might also need to calibrate the IQ imbalance for
> your operating frequency. See ue.conf and enb.conf at the bottom
>
> On Wed, 15 Nov 2017 at 10:39 Anuchuru Sudheer Kumar <
> sudheeranuchuru at gmail.com> wrote:
>
>> Hi Ismael,
>>
>> Thanks for your reply.
>>
>> I placed both eNodeB and UE very near to each other and tested.
>>
>> Regards
>> Sudheer
>>
>> On Wed, Nov 15, 2017 at 2:55 PM, Ismael Gomez <ismael.gomez@
>> softwareradiosystems.com> wrote:
>>
>>> Looks like the signal quality is not good enough to proceed with the
>>> synchronization.
>>>
>>> On Wed, 15 Nov 2017 at 10:24 Anuchuru Sudheer Kumar <
>>> sudheeranuchuru at gmail.com> wrote:
>>>
>>>>
>>>> Hi,
>>>>
>>>> I am trying to connect UE (using bladeRF) to the eNodeB (using bladeRF).
>>>>
>>>> I am getting below errors in ue.log.
>>>>
>>>> *14:24:19.682528 [PHY ] Info    [07105] SYNC:  DONE, TTI=7180,
>>>> sfn_offset=2*
>>>> *14:24:19.691991 [RRC ] Info    Detected 1 in-sync from PHY. Stopping
>>>> T310 timer*
>>>> *14:24:19.723191 [MAC ] Info    [07222] SCHED: Searching for DL grant
>>>> for SI-RNTI window_st=7245, window_len=1*
>>>> *14:24:19.833232 [MAC ] Info    [07332] SCHED: Searching for DL grant
>>>> for SI-RNTI window_st=7345, window_len=1*
>>>> *14:24:19.833804 [MAC ] Info    [07333] BSR:   QUEUE status: 0 (0), 0
>>>> (0), 0 (0), 0 (0), 0 (0), 0 (0), *
>>>> *14:24:19.866622 [PHY ] Error   [07364] Sync error. Sending out-of-sync
>>>> to RRC*
>>>> *14:24:19.866654 [RRC ] Info    Detected 1 out-of-sync from PHY.
>>>> Starting T310 timer*
>>>> *14:24:19.881964 [PHY ] Info    [07364] SYNC:  Decoding MIB...*
>>>> *14:24:19.892013 [PHY ] Info    [07364] SYNC:  Decoding MIB...*
>>>> *14:24:19.902065 [PHY ] Info    [07364] SYNC:  Decoding MIB...*
>>>> *14:24:19.902245 [PHY ] Info    [07364] SYNC:  DONE, TTI=7400,
>>>> sfn_offset=0*
>>>> *14:24:19.912114 [RRC ] Info    Detected 1 in-sync from PHY. Stopping
>>>> T310 timer*
>>>> *14:24:19.928044 [PHY ] Error   [07425] Sync error. Sending out-of-sync
>>>> to RRC*
>>>> *14:24:19.928060 [RRC ] Info    Detected 1 out-of-sync from PHY.
>>>> Starting T310 timer*
>>>> *14:24:19.981968 [PHY ] Info    [07425] SYNC:  Decoding MIB...*
>>>> *14:24:19.982082 [PHY ] Info    [07425] SYNC:  DONE, TTI=7480,
>>>> sfn_offset=0*
>>>> *14:24:19.992028 [RRC ] Info    Detected 1 in-sync from PHY. Stopping
>>>> T310 timer*
>>>> *14:24:19.993282 [MAC ] Info    [07492] SCHED: Searching for DL grant
>>>> for SI-RNTI window_st=7505, window_len=1*
>>>> *14:24:20.048171 [PHY ] Error   [07545] Sync error. Sending out-of-sync
>>>> to RRC*
>>>> *14:24:20.048206 [RRC ] Info    Detected 1 out-of-sync from PHY.
>>>> Starting T310 timer*
>>>> *14:24:20.081987 [PHY ] Info    [07545] SYNC:  Decoding MIB...*
>>>>
>>>>
>>>> Please help me out in solving this issue.
>>>>
>>>> Regards
>>>> Sudheer
>>>>
>>>> _______________________________________________
>>>> srslte-users mailing list
>>>> srslte-users at lists.softwareradiosystems.com
>>>> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>>>>
>>>
>>
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