[srsran-users] srsUE unable to attach to USRP N210

[Johann T.]

Hi Andrei,

Unfortunately there is no easy way to fix this. You will need to modify the
source code and add some resampling function there. To my knowledge, the
old OpenLTE has a fix for that which enables the use of N210. But I am not
aware of similar code exists for srsLTE.

Good luck!
Johann


On Wed, Feb 22, 2023 at 12:40 PM Andrei-Paul Țocu <AT1288 at live.mdx.ac.uk>
wrote:

> Hello,
>
> So there is no way for me to make srsRAN work with the n210? If there is a
> way, can you please guide me to that?
>
> Best regards,
> Andrei
>
> On 22 Feb 2023 10:42, "Johann T." <johann.tzt at gmail.com> wrote:
> You don't often get email from johann.tzt at gmail.com. Learn why this is
> important <https://aka.ms/LearnAboutSenderIdentification>
> Hi Andrei,
>
> It won't work with N210 due to the fixed sample rate of 100 MHz, which is
> not the multiple of the common LTE sampling rates. You would need B210 for
> that.
>
> Good luck!
>
> Johann
>
>
> On Tue, Feb 21, 2023 at 6:13 PM Andrew <at1288 at live.mdx.ac.uk> wrote:
>
>> Hello!
>>
>> I have a major project for uni that requires me to create a phantom-cell
>> 4G/5G network.
>>
>> The professor provided me with two N210 USRPs and managed to flash them
>> both with the right firmware and both are detectable by pinging their ips.
>>
>> But when it comes to using SRS nothing works - srs won't attach to any of
>> them. Yet, when running *sudo srsue *it appears as that it recognizes
>> the USRP2/N-series but won't go any further.
>>
>> I am extremely newbie in this field, I have just some tiny linux
>> experience and basic C programming skills.
>>
>> Please see attached the error
>>
>> [ERROR] [UHD RF] AssertionError: assertion failed:
>>   internal is not a valid time source.
>>   possible values are: [none, external, _external_, mimo].
>>
>>
>> and
>>
>>
>> Unable to open RF device 'file'
>> /home/andrew/srsRAN/lib/src/phy/rf/rf_imp.c:149: Failed to open a RF
>> frontend device. Please check the available srsRAN CMAKE options to verify
>> what RF frontend devices have been detected in your system
>> Error initializing radio.
>>
>>
>> Please advise.
>>
>> Best regards,
>>
>> Andrei-Paul Tocu
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