[srslte-users] srsUE USIM Support => Late Warnings

[Paul Sutton]

Hi David,

Have you tried handing off the message to a separate thread at the NAS
layer?
In the srsUE receive path, our high-priority DSP threads push messages
all the way up through the stack. It looks like the hard USIM delay is
blocking one of these threads for 43ms, resulting in RF timing misses.
We have multiple DSP threads in a pool which can take up the slack at
lower bandwidths but, as this is a 20MHz carrier, we can't afford to
lose one for them for that long.

Best regards,
Paul


On 05/12/16 09:07, David Rupprecht wrote:
> Dear all,
>
> I have implemented USIM Support for the srsUE using the PCSClib.
> Unfortunately, the communication with the SIM Card takes to long (43 us
> in the log) and the Authentication Response can not be sent correctly
> indicated by RF late warnings with a crash.
>
> My question is, can I some how delay the Authentication Response? To my
> understanding that should be specification conform, as the communication
> on the NAS layer independent of the RF layer. Do you have any advises
> concerning this problem?
>
> Best regards,
> David
>
>
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-- 
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Paul Sutton Ph.D.

Software Radio Systems (SRS)
http://www.softwareradiosystems.com

+353-87-9813473 | paul at softwareradiosystems.com

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