This first part moves BCCH message primitives from osmo-bts-sysmo to common
part. A new file "common/l1sap.c" is introduced to implement handling of
layer 1 messages from/to BTS model.
Use the standard RSL commands to order a logical channel
to use a fixed power level.
The code is not fully verified and there was a last minute
change to invoke bts_model_adjst_ms_pwr.
For systems with a bigger PA enabling the full output power at
once might draw more current than a power supply can provide. This
code will step up the output power in smaller steps to avoid this
situation.
These routines do not pass the gsm_abis_mo and parsing the FOM
header of the msg does not seem to be a good idea either. Pass
in the OML object so that the model code can determine what the
void pointer is.
The BTS layer needs to inform the handover code when an access
burst has been received. In turn the handover layer will ask the
bts to modify the channel, it will schedule the physical information
inform the BSC with the HANDOVER DETECTION and waits for the BTS
layer to inform it about the first received frame to stop a timer.
Andreas Eversberg
Harald Welte