add initial NTN support for gNB
For the initial NTN support for gNB, this is modified:
- add NTN specific parameter cellSpecificKoffset_r17 and use it for UL scheduling
- change TA update interval to 100 frames instead of 10
- fix phytest scheduler in case no HARQ processes are available
- make checks for missed feedbacks more robust w.r.t. frame number warp-around in find_harq()
- increase RRC timers t300, t301 and t319
This is part of the work developed by Fraunhofer IIS within the ESA-funded project 5G-GOA (https://connectivity.esa.int/projects/5ggoa).
depends on !2712
Edited by Thomas Schlichter