* Improve reliability of timestamp to tti conversion
Difftime is not reliable as it might use 32 bit calculation, depending on the system. This leads to wrong frame numbers and subframe indices.
I encountered this Issue when testing the pssch_ue exampel on my system and the conversion from timestamp to frame number and sf idx was wrong.
* Improve GNSS Sync
Added loop to check for GNSS alignment while syncing.
If the received GNSS signal is weak, synchronization errors might occur while syncing.
* decouple EUTRA and NR stack classes
* implement dummy X2 interface with control and data plane methods
* implement eNB time source interface that PHY calls
we've had a few runs in the CI where opening the specified RF device
failed but the eNB/UE still continued to run, just picking the next available
run. This led to false-positive tests.
The policy should be that whenever the user specified a RF device to
be openend, and this device fails, the whole process should fail and
the application should exit.
The auto-detection mode is still available but only if no device name
is specified at all.
the Msg3 UL grant requires the TTI in which the RAR has been received
to calcualte the correct timing. There was a race between PHY and Stack
thread.
This patch circumvents the issue by removing a PHY state member that only holds
the RAR Rx timing. In the new interface the RA proc passes the Rx TTI
to the PHY again when setting the UL grant so the PHY can calculate the
correct timing without any state.
* the old srsran_cell_cfg_t is only carried for SIB params
* the SIB scheduling, etc needs to be ported and integrated into NR data structures
* disbable SIB test for the moment