[srslte-users] Band 71 - Srslte

[Francisco Paisana]

Hey Mathieu,

Regarding the change you made in the phy_common.cc, that error message
tells that 71 is not a valid value for the freq band indicator. Looking at
the TS 36.331, the SIB1 has a freqBandIndicator field of type
"FreqBandIndicator". Also, in the same TS:

> FreqBandIndicator ::=  INTEGER (1..maxFBI)
> maxFBI                        INTEGER ::= 64 -- Maximum value of fequency
> band indicator

So, 71 is not a supported value for that field (max is 64). To use 71, you
probably have to use one of the SIB1 extensions (v9e0 I believe).
Unfortunately, it seems srsLTE does not have this extension option being
handled at the moment.

Can you share the logs when you set the frequency manually? Also, are you
changing the UL frequency accordingly?

Regards,
Francisco


On Fri, Jul 5, 2019 at 8:42 PM Mathieu Châteauvert <
mathieu.chateauvert at hotmail.com> wrote:

> Hi,
>
> Yes, when I set the direct frequency (634.5 MHz) with Srslte, the phone
> was not able to connect to srslte. With the same settings, the phone was
> able to connect to Amarisoft on the same exact frequency.
>
> When I added that band on the phy_common.c, the error :
>
> The condition lb <= n <= ub (1 <= 71 <= 64) was not met
> [/home/chateam/Documents/lte/srsLTE/lib/src/asn1/rrc_asn1.cc][20028]
> Encoding failure.
> [/home/chateam/Documents/lte/srsLTE/lib/src/asn1/rrc_asn1.cc][20328]
> Encoding failure.
> [/home/chateam/Documents/lte/srsLTE/lib/src/asn1/rrc_asn1.cc][20208]
> Encoding failure.
> [/home/chateam/Documents/lte/srsLTE/lib/src/asn1/rrc_asn1.cc][20358]
> Encoding failure.
>
> That is why I wonder if Band 71 is supported with srslte.
>
> Thanks,
> Mathieu
>
> ------------------------------
> *De :* Ralph A. Schmid, dk5ras <ralph at schmid.xxx>
> *Envoyé :* 4 juillet 2019 21:09
> *À :* 'Mathieu Châteauvert'; srslte-users at lists.softwareradiosystems.com
> *Objet :* RE: [srslte-users] Band 71 - Srslte
>
>
> Hi,
>
>
>
> Why not just using direct frequency entry, in MHz? Then any band should be
> possible...
>
>
>
> Ralph.
>
>
>
> *From:* srslte-users [mailto:
> srslte-users-bounces at lists.softwareradiosystems.com] *On Behalf Of *Mathieu
> Châteauvert
> *Sent:* Thursday, July 4, 2019 3:29 PM
> *To:* srslte-users at lists.softwareradiosystems.com
> *Subject:* [srslte-users] Band 71 - Srslte
>
>
>
> Hi,
>
>
>
> I wonder if Band 71 is supported in srsLte. It is using the 600Mhz to 700
> Mhz range.
>
>
>
> When trying to use it, we get the error that it is an invalid DL_EARFCN.
> In the phy_common.c file, it says that band 71 is " dummy band to bound
> band70 earfcn".
>
>
>
> Thanks,
>
>
>
> Mathieu
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>
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