[srslte-users] Building srsLTE on RasPi 4 Buster...

Sat Feb 15 11:01:31 UTC 2020

Oh, I should add: I have since shifted the Carrier Offset Frequency (CFO)
from -1.1kHz down to -0.4kHz with:
freq_offset = -1100

The same issue happens.

On Sat, Feb 15, 2020 at 2:45 AM James Hagerman <james.hagerman at gmail.com>
wrote:

> Hey all,
>
> I'm new on this mailing list but I've been poking at srsLTE for a bit now.
> I've been taking notes in this github gist. I need to clean it up, but it
> might contain some useful info:
> https://gist.github.com/JamesHagerman/fafec6ee2ee076fe7cda4cf4dd74edd0
>
> This reply is response to getting srsLTE running on the RPI4 with a
> LimeSDR Mini. After starting up srsenb and srsepc on the RPi4, whenever a
> UE (either a physical LTE phone or srsue) sends it's RACH, the eNB running
> on the RPi4 always throws this error:
>
> RACH:  tti=4501, preamble=52, offset=24, temp_crnti=0x46
> SCHED: Could not transmit RAR within the window (RA TTI=4501, Window=10,
> Now=4554)
> Disconnecting rnti=0x46.
> [and repeats a bunch]
>
> When I try to connect with srsue (using my laptop and a BladeRF), it logs
> a matching error:
>
> Attaching UE...
> Searching cell in DL EARFCN=3400, f_dl=2685.0 MHz, f_ul=2565.0 MHz
> [INFO] setSampleRate(Rx, 0, 1.920000 MHz), actual = 1.920000 MHz
> Set Rx bandwidth to 2.50 MHz
> [INFO] setSampleRate(Tx, 0, 1.920000 MHz), actual = 1.920000 MHz
> Set Tx bandwidth to 1.50 MHz
>
> Warning TX/RX time offset has not been calibrated for device none. Set a
> value manually
>
> Found Cell:  Mode=FDD, PCI=1, PRB=25, Ports=1, CFO=-1.1 KHz
> [INFO] setSampleRate(Rx, 0, 5.760000 MHz), actual = 5.760000 MHz
> Set Rx bandwidth to 5.00 MHz
> [INFO] setSampleRate(Tx, 0, 5.760000 MHz), actual = 5.760000 MHz
> Set Tx bandwidth to 5.00 MHz
>
> Warning TX/RX time offset has not been calibrated for device none. Set a
> value manually
>
> Found PLMN:  Id=00101, TAC=7
> Random Access Transmission: seq=15, ra-rnti=0x2
> /[REDACTED]/srsLTE/lib/src/phy/rf/rf_soapy_imp.c.145: Error while
> receiving aync metadata: UNKNOWN (0), flags=6, channel=0, timeNs=1208675223
>
> Random Access Transmission: seq=1, ra-rnti=0x2
> Random Access Transmission: seq=24, ra-rnti=0x2
> Random Access Transmission: seq=23, ra-rnti=0x2
> Random Access Transmission: seq=3, ra-rnti=0x2
> Random Access Transmission: seq=33, ra-rnti=0x2
> Random Access Transmission: seq=2, ra-rnti=0x2
> Random Access Transmission: seq=44, ra-rnti=0x2
> Random Access Transmission: seq=13, ra-rnti=0x2
> Random Access Transmission: seq=1, ra-rnti=0x2
> Warning: Detected Radio-Link Failure
>
> Here are the versions of software I using on the RPI4:
>
> LimeSuite 19.04.0
> LimeSDR Mini running v1.30 of the Gateware FW (the latest; installed with
> LimeSuite 19.04.0)
> SoapySDR 0.7.2 (master is on 0.8.0 and srsLTE needs updates before we can
> upgrade)
> srsLTE 19.12
>
> I chose these versions because they work great when I run the eNB and EPC
> from my laptop using the LimeSDR Mini, LimeSDR USB, or BladeRF. When I
> installed everything on the RPi4, I compiled from source on the Pi from.
> For srsLTE, I had to comment our those -Werror lines to get the build to
> complete.
>
> So far there are the things I've tried to get this working on the RPi4:
>
> - Ensured the LimeSDR is nice and cool (I have one of the Lime AC Mini
> active cooling cases and it's around 29C at idle and bumps up to about 35C
> when the eNB is running. Much better than the 58C it used to hit...)
> - Overclocked the RPi4 (and disabled the overclock after it didn't improve
> the situation)
> - Ensured the RPi4 has enough power and is not throttling due to
> undervolting or overheating
> - Ensured the LimeSDR Mini has plenty of power available by using the USB
> Y-splitter that came with the LimeSDR USB and plugging in to a second, high
> current USB power source
> - Tried all USB3 and USB2 ports available from the RPi4
> - Tried using a powered USB3 hub between the Pi and the LimeSDR Mini
> - Tried setting `time_adv_nsamples` to a selection of values between 0 and
> 500 without noticeable change
>
> Again, all of this works fine when it's running on my laptop! Based on
> this, as far as I can tell, srsLTE 19.12.0 does not run correctly on the
> RPi4 at this point.
>
> What am I missing?
>
> Thanks for your help,
> James Hagerman
>
> On Fri, Oct 25, 2019 at 4:37 AM Ralph A. Schmid, dk5ras <ralph at schmid.xxx>
> wrote:
>
>> Great that it looks good for you, too. Usually you should be ready to go,
>> enter sour SIM card data into the user_db.csv, start srsepc and srsenb, and
>> it should be on air and ready to be used. In my tests it was as stable and
>> reliable as any commercial network out here.
>>
>> Now I need to find a way to NAT between wlan0 and srs_spgw_sgi, to test
>> internet access.
>>
>> Ralph.
>>
>>
>> > -----Original Message-----
>> > From: srslte-users [mailto:srslte-users-
>> > bounces at lists.softwareradiosystems.com] On Behalf Of zip at swigerco.com
>> > Sent: Thursday, October 24, 2019 9:17 PM
>> > To: srslte-users <srslte-users at lists.softwareradiosystems.com>
>> > Subject: [srslte-users] Building srsLTE on RasPi 4 Buster...
>> >
>> > Thanks so much - with your notes got srsLTE built in RPi4B raspbian, by
>> > commenting out the two lines 393/394 in CMakeLists.txt:
>> >
>> > # Add -Werror to C/C++ flags for newer compilers if(NOT
>> > CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
>> > #  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")            <-- comment
>> > out
>> > # set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")         <--     "
>> > endif()
>> >
>> > I also had to remove zmq -dev package or run into an error there.
>> > Installed (still running make test), and started up epc/enb with
>> default config
>> > OK, LimeSDR-Mini seems happy. Have not tested over the air attach yet
>> (still
>> > remote).
>> >
>> > --Chuck
>> >
>> > > Ralph - it would be wise in these kind of projects to note down the
>> > > exact version of everything from LimeSuite firmware to operating
>> > > system, everything!
>> >
>> > At the moment this is quite simple, all in latest release.
>> >
>> > LimeSDR Mini, Gateware 1.30
>> >
>> > Limesuite:
>> >
>> > commit 627c82c76938765e93e85784cb359ea4aa71554e (HEAD -> master,
>> > origin/master, origin/HEAD)
>> >
>> >
>> > _______________________________________________
>> > srslte-users mailing list
>> > srslte-users at lists.softwareradiosystems.com
>> > http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>>
>> _______________________________________________
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>>
>
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