[srslte-users] SRS UE connecting to commercial network

Saimanoj Katta saimanoj.katta at cumucore.com
Fri Jun 28 09:41:17 UTC 2019 

Hi,

Yes. Thank you very much for fixing the Format 1C issue.

I noticed my error. I ran it real time using sudo command next. However,
the transmission was unsuccessful. From my reading in  LTE message attach
sequence chart
<http://www.eventhelix.com/lte/attach/LTE-RRC-Connection-Setup-Messaging.pdf>
:UE initiates a session to the eNodeB using a random RA-RNTI. Further,
eNodeBassigns a C-RNTI and adjusts timing. *Then UE fails to request the
RRC connection via UL-SCH*. From the rank indication, a good SINR is
reflected by a rank 2. Therefore, there is good SINR, but yet, it fails to
connect. Have I misunderstood something?

In the PDCP log, it mentions, there is only 1 antenna available, whereas, I
have two antennas configured.

12:36:51.672814 [PHY0] [E] [08063] Warning: Received Rank Indication report
configuration but only 1 antenna is available
12:36:51.673058 [PHY1] [E] [08064] Warning: Received Rank Indication report
configuration but only 1 antenna is available
12:36:51.673070 [PHY2] [E] [00000] Warning: Received Rank Indication report
configuration but only 1 antenna is available

Any word of advice would be appreciated. Attached are the new logs of ue
and pdcp for reference.

ubuntu at ubuntu-Zephyrus-GX501GI:~/srsLTE-issuefix_format1c/build$ sudo srsue
--rf.dl_earfcn 3350  --log.all_level=info
Reading configuration file /home/ubuntu/.config/srslte/ue.conf...

Built in Release mode using 19.3.0.

---  Software Radio Systems LTE UE  ---

Opening 1 RF devices with 1 RF channels...
[INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501;
UHD_3.15.0.git-1-gf83faf28
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP with args: type=x300,master_clock_rate=184.32e6
[INFO] [X300] X300 initialization sequence...
[INFO] [X300] Maximum frame size: 1472 bytes.
[INFO] [X300] Radio 1x clock: 184.32 MHz
[INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a
[INFO] [0/DmaFIFO_0] Initializing block control (NOC ID: 0xF1F0D00000000000)
[INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1299 MB/s)
[INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1319 MB/s)
[INFO] [0/Radio_0] Initializing block control (NOC ID: 0x12AD100000000001)
[INFO] [0/Radio_1] Initializing block control (NOC ID: 0x12AD100000000001)
[INFO] [0/DDC_0] Initializing block control (NOC ID: 0xDDC0000000000000)
[INFO] [0/DDC_1] Initializing block control (NOC ID: 0xDDC0000000000000)
[INFO] [0/DUC_0] Initializing block control (NOC ID: 0xD0C0000000000000)
[INFO] [0/DUC_1] Initializing block control (NOC ID: 0xD0C0000000000000)
Waiting PHY to initialize...
...
Attaching UE...
Searching cell in DL EARFCN=3350, f_dl=2680.0 MHz, f_ul=2560.0 MHz
.
Found Cell:  Mode=FDD, PCI=12, PRB=100, Ports=2, CFO=0.6 KHz
Found PLMN:  Id=24459, TAC=12594
Found PLMN:  Id=24459, TAC=12594
Could not find Home PLMN Id=00101, trying to connect to PLMN Id=24459
Random Access Transmission: seq=28, ra-rnti=0x2
RRC Connected
Random Access Complete.     c-rnti=0xdce6, ta=5
Received Attach Reject. Cause= 02
Received RRC Connection Release
RRC IDLE
Failed to Attach
Random Access Transmission: seq=24, ra-rnti=0x2
RRC Connected
Random Access Complete.     c-rnti=0x78b5, ta=5
Received Attach Reject. Cause= 02
Received RRC Connection Release
RRC IDLE
Failed to Attach
Random Access Transmission: seq=5, ra-rnti=0x2
RRC Connected
Random Access Complete.     c-rnti=0x1484, ta=5
Received Attach Reject. Cause= 02
Received RRC Connection Release
RRC IDLE
Failed to Attach
Random Access Transmission: seq=10, ra-rnti=0x2
RRC Connected
Random Access Complete.     c-rnti=0xb053, ta=5
Received Attach Reject. Cause= 02
Received RRC Connection Release
RRC IDLE
Failed to Attach
Random Access Transmission: seq=1, ra-rnti=0x2
RRC Connected
Random Access Complete.     c-rnti=0x4c22, ta=5
Received Attach Reject. Cause= 02
Received RRC Connection Release
RRC IDLE
Failed to Attach
/home/ubuntu/srsLTE-issuefix_format1c/lib/src/phy/rf/rf_uhd_imp.c.839:
Error timed out while receiving samples from UHD.

/home/ubuntu/srsLTE-issuefix_format1c/lib/src/phy/ue/ue_sync.c.727: Error
receiving samples

/home/ubuntu/srsLTE-issuefix_format1c/lib/src/phy/rf/rf_uhd_imp.c.839:
Error timed out while receiving samples from UHD.

/home/ubuntu/srsLTE-issuefix_format1c/lib/src/phy/ue/ue_sync.c.727: Error
receiving samples

^Z
[2]+  Stopped                 sudo srsue --rf.dl_earfcn 3350
--log.all_level=info

Regards,
Saimanoj

On Tue, Jun 25, 2019 at 4:13 PM Ismael Gomez <
ismael.gomez at softwareradiosystems.com> wrote:

> Hi Saimanoj,
>
> Thanks for sharing your log. I see now that the Format1C issue is fixed.
>
> The problem that you have now is with real-time. Make sure you run the UE
> as sudo.
>
> On Mon, 24 Jun 2019 at 14:53, Saimanoj Katta <saimanoj.katta at cumucore.com>
> wrote:
>
>> Hello Ismael,
>>
>> Thank you for notifying me and noticing the bug. I compiled the code and
>> tested it. There is huge improvement in the detection of the PLMN. However,
>> issue still persists.
>>
>> 1) I did execute the Pdsch option first for a clean signal. It does.
>> Next, the code does not detect the PLMN automatically.
>> 2) I changed the PLMN code to a number which eNB is configured. i.e
>> 24451. It detects the code. However, it looks for HPLMN. Since, it is not
>> there, it tries to connect via existing PLMN and it fails (I am assuming it
>> looks for the equivalent HPLMN next). Here, it fails.  PS: I changed the
>> details in the ue.conf.example and nas_test.cc file
>>
>> In nas.c file,
>>     nas_log->error("Getting Home PLMN Id from USIM. Defaulting to
>> 001-01\n");
>>     uint16_t mcc          = 61441; // This is 001
>>     uint16_t mnc          = 65281; // This is 01
>>
>> How is this encoded? I suspect this triggers the default one. How can I
>> code it?
>>
>> *Attached are the logs for your reference:*
>> *1. ue_original.log (Without modifying PLMN code)*
>> * 2. ue.log (Modifying PLMN code). *
>>
>> *Here's the output at the Terminal: *
>>
>> ubuntu at ubuntu-Zephyrus-GX501GI:~/srsLTE-issuefix_format1c/build$ srsue
>> --rf.dl_earfcn 2875 --log.all_level=info
>> Reading configuration file /home/ubuntu/.config/srslte/ue.conf...
>>
>> Built in Release mode using 19.3.0.
>>
>> ---  Software Radio Systems LTE UE  ---
>>
>> Opening 1 RF devices with 1 RF channels...
>> [INFO] [UHD] linux; GNU C++ version 7.4.0; Boost_106501;
>> UHD_3.15.0.git-1-gf83faf28
>> [INFO] [LOGGING] Fastpath logging disabled at runtime.
>> Opening USRP with args: type=x300,master_clock_rate=184.32e6
>> [INFO] [X300] X300 initialization sequence...
>> [INFO] [X300] Maximum frame size: 1472 bytes.
>> [INFO] [X300] Radio 1x clock: 184.32 MHz
>> [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 0.929a
>> [INFO] [0/DmaFIFO_0] Initializing block control (NOC ID:
>> 0xF1F0D00000000000)
>> [INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1300 MB/s)
>> [INFO] [0/DmaFIFO_0] BIST passed (Throughput: 1303 MB/s)
>> [INFO] [0/Radio_0] Initializing block control (NOC ID: 0x12AD100000000001)
>> [INFO] [0/Radio_1] Initializing block control (NOC ID: 0x12AD100000000001)
>> [INFO] [0/DDC_0] Initializing block control (NOC ID: 0xDDC0000000000000)
>> [INFO] [0/DDC_1] Initializing block control (NOC ID: 0xDDC0000000000000)
>> [INFO] [0/DUC_0] Initializing block control (NOC ID: 0xD0C0000000000000)
>> [INFO] [0/DUC_1] Initializing block control (NOC ID: 0xD0C0000000000000)
>> Waiting PHY to initialize...
>> Warning: Failed to create thread with real-time priority. Creating it
>> with normal priority: Success
>> Warning: Failed to create thread with real-time priority. Creating it
>> with normal priority: Success
>> Warning: Failed to create thread with real-time priority. Creating it
>> with normal priority: Success
>> Warning: Failed to create thread with real-time priority. Creating it
>> with normal priority: Success
>> ...
>> Attaching UE...
>> Searching cell in DL EARFCN=2875, f_dl=2632.5 MHz, f_ul=2512.5 MHz
>> .
>> Found Cell:  Mode=FDD, PCI=12, PRB=25, Ports=2, CFO=-0.3 KHz
>> Found PLMN:  Id=24451, TAC=12594
>> Could not find Home PLMN Id=00101, trying to connect to PLMN Id=24451
>> Random Access Transmission: seq=30, ra-rnti=0x2
>> Random Access Complete.     c-rnti=0x3d7, ta=4
>> Received ConnectionReject. Wait time: 8
>> Random Access Transmission: seq=3, ra-rnti=0x2
>> Received ConnectionReject. Wait time: 8
>> Random Access Complete.     c-rnti=0x9fa6, ta=4
>> Random Access Transmission: seq=27, ra-rnti=0x2
>> Received ConnectionReject. Wait time: 8
>> Random Access Complete.     c-rnti=0x3b75, ta=4
>> Random Access Transmission: seq=16, ra-rnti=0x2
>> Received ConnectionReject. Wait time: 8
>> Random Access Complete.     c-rnti=0xd744, ta=0
>> Random Access Transmission: seq=0, ra-rnti=0x2
>> Received ConnectionReject. Wait time: 8
>> Random Access Complete.     c-rnti=0x7313, ta=4
>>
>>
>> Regards,
>> Saimanoj
>>
>> On Fri, Jun 21, 2019 at 7:15 PM Ismael Gomez <
>> ismael.gomez at softwareradiosystems.com> wrote:
>>
>>> Hi Saimanoj,
>>>
>>> Thanks for reporting this. This is indeed a bug in resolving RV value
>>> for Format1C for SI-RNTI. Thanks for catching that. I've pushed a new
>>> branch with a possible fix here:
>>> https://github.com/srsLTE/srsLTE/tree/issuefix_format1c
>>>
>>> When you have a chance, could you please try it again and let us know if
>>> it works? ue.log would be very useful.
>>>
>>> Thanks
>>>
>>> On Fri, 21 Jun 2019 at 13:55, Saimanoj Katta <
>>> saimanoj.katta at cumucore.com> wrote:
>>>
>>>> Hello Andre,
>>>>
>>>> Sorry for the late reply. I get a clean signal when I execute pdsch_ue
>>>> as you advised me to check.
>>>> When I run srsue, it even detects a cell, but, the index values start
>>>> to appear and the error keeps happening-
>>>>
>>>> Found Cell:  Mode=FDD, PCI=12, PRB=25, Ports=2, CFO=0.3 KHz
>>>> Invalid inputs rv_idx=-1, cb_idx=15
>>>> /home/ubuntu/srsLTE/lib/src/phy/phch/sch.c.343: Error in rate matching
>>>> .
>>>> .
>>>> .
>>>> Invalid inputs rv_idx=-1, cb_idx=15
>>>> /home/ubuntu/srsLTE/lib/src/phy/phch/sch.c.343: Error in rate matching
>>>>
>>>> ^Z
>>>> [7]+  Stopped                 srsue --rf.dl_earfcn 2875
>>>> --log.all_level=info
>>>>
>>>> It always, asks MAC to look for SIB1(Attached are the logs). In eNB
>>>> configuration, S1B1 is not configured. To configure it in eNB, it takes a
>>>> huge time, I understand. Is it easier to disable it in the code and start
>>>> working to recieve SIB2?  I am a beginner to this platform and I am
>>>> confused, what to do next.
>>>>
>>>> Regards,
>>>> Saimanoj
>>>>
>>>> On Fri, Jun 14, 2019 at 3:18 PM Andre Puschmann <
>>>> andre.puschmann at softwareradiosystems.com> wrote:
>>>>
>>>>> You don't need to configure anything at the UE side. It detects
>>>>> everything automatically.
>>>>>
>>>>> Try pdsch_ue if you have issues with the UE and make sure you can
>>>>> receive a clean signal.
>>>>>
>>>>> Cheers
>>>>> Andre
>>>>>
>>>>> On 11/6/19 16:04, Saimanoj Katta wrote:
>>>>> > Hi,
>>>>> >
>>>>> > I have attached the logs. I analyzed and realized this: The PLMN
>>>>> which I
>>>>> > have given is not detected by the code. Furthermore, the SIB1 is not
>>>>> > detected. There needs to be decoding of MIB to connect, right? Do I
>>>>> need
>>>>> > to change something from expert config options?
>>>>> >
>>>>> > Further, In the README file, it says, it has been tested for
>>>>> bandwidths:
>>>>> > 1.4, 3, 5, 10, 15 and 20 MHz. I assume this is the channel bandwidth
>>>>> and
>>>>> > I need it for 20MHz. From one of the papers, I remember the srsLTE
>>>>> code
>>>>> > is set to 20MHz. How do I change it? I was not able to decode.
>>>>> >
>>>>> > Regards,
>>>>> > manu
>>>>>
>>>>>
>>>>> --
>>>>> Andre Puschmann
>>>>>
>>>>> Software Radio Systems (SRS)
>>>>> http://www.softwareradiosystems.com
>>>>>
>>>>> PGP/GnuPG key: 6C42AB31
>>>>> fingerprint: 137A AE49 785B A445 257C 8AD7 D877 A498 6C42 AB31
>>>>>
>>>> _______________________________________________
>>>> srslte-users mailing list
>>>> srslte-users at lists.softwareradiosystems.com
>>>> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>>>>
>>>
>>>
>>> --
>>> Ismael Gomez Ph.D.
>>>
>>> Software Radio Systems (SRS)
>>> http://www.softwareradiosystems.com
>>>
>>> ismael.gomez at softwareradiosystems.com
>>>
>>
>
> --
> Ismael Gomez Ph.D.
>
> Software Radio Systems (SRS)
> http://www.softwareradiosystems.com
>
> ismael.gomez at softwareradiosystems.com
>
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