Add a loop to advance slots as determined by current ("DL") slot, and
advance further into the future (for "UL" slots) if TDAs allow. Ensure
to schedule all TDAs if it's the last DL slot, to guarantee a previously
scheduled TDA will also reoccur (i.e., for guaranteeing that
retransmissions can be made).
Note that the check for number of UE being zero is removed, as this
allows to keep "ul_next" close to the "min_next" slot. This way, we can
use fs_get_max(); otherwise, if we did not always execute this loop,
they might diverge far from each other, making the logic inside the loop
more complicated.
This commit introduces a new type "fsn_t" (frame-slot number) that
encapsulates a single frame-slot combination in a single struct. The
helper functions (in gNB_scheduler_ulsch.c) should be moved to a new
file under common/, but we don't do this here to limit the amount of
code changes.
For scheduling multiple ULSCH ahead, we will have to use different k2.
Hence, we will need to check for k2 in the TDA selection as well. The
function get_ul_tda() is renamed to get_num_ul_tda() to reflect that it
might return multiple TDAs (not done in this commit, but in a follow-up
MR). get_num_ul_tda() also returns a pointer to the first suitable TDA.
In the phy-test scheduler, simplify the selection of the TDA to use: do
not hardcode a specific K2, but rather, use the first one (with any k2).
For the multi-UL slot scheduling functionality in a follow-up commit, it
would be important to know if the scheduler allocated any UEs. If
pf_ul() allocated for some UEs, we might run it again on a different
slot. If on the other hand, no UEs were allocated, there is no point in
running it again.
Introduce support for Cat-B RU using Predefined-Beam BF with Aerial L1
This merge introduces the support for BeamID based Beamforming in OAI L2 using FAPI and leveraging Aerial L1. Support for OAI L1 is not in the scope of this MR.
Main changes:
- Introduced a third state for the analog_beamforming parameter.
0=disabled,1=analog_bf,2=oran_bf
- Correctly populated the FAPI BF PDUs (prg_size, num_prgs,
dig_bf_interfaces)
The Dockerfiles are reused for building on different architectures
(amd64/arm64). They differ, though, on some steps for downloading or
installing platform-specific utilities.
This is handled automatically when using BuildKit, which is the default
in docker versions v23.0+. Older docker versions require some special
settings. Explain this in the README.
Closes: #973
Previous commits removed min_grant_mcs and instead introduced
dl/ul_min_mcs as a more generic replacement.
Fixes: 96b0cae63e ("Drop 'min_grant_mcs' configuration parameter ")
Fixes: 699afafc6f ("Add support for 'dl_min_mcs' and 'ul_min_mcs'
configuration parameters")
Make Amarisoft UE sim a RedCap UE
Change Amarisoft UE configuration and gNB of the AW2S pipeline to
be/handle RedCap UEs.
The UE should only connect if the gNB handles RedCap UEs. In the logs,
we should see
[MAC] UE with RNTI 3725 is RedCap
which we check for the first two UEs (one normal UE/absence of this
message, one RedCap UE/presence of this message).
Cleanup documentation and interface of the LDPC segment coding libraries
Fix interface: The LDPC segment decoder interface had variables
'harq_pid', 'ulsch_id' and 'C' that are not useful to the segment
decoder. This MR removes these variables from the interface.
Fix documentation: libconfig log do not display anymore by default so we
may better not show them in the documentation to avoid any
misunderstanding.
Remove ldpc_cl library since the library does not work.
Since the parent commit, UE 1 is normal (no RedCap), UE 2 is RedCap.
Verify that the gNB agrees with that and detects the second UE as RedCap
by analyzing some logs.
The first check is a bit elaborate, but basically is
[ $(docker logs | grep XYZ | wc -l) -eq 0 ]
^ ^ ^ ^ ^
1 2 3 4 5
(1) is the if statement, that compares
(4) the number of occurrences
(3) of "RedCap" in the
(2) docker logs
(5) to being equal to
Note for all UEs which number, and whether it is RedCap (so this need to
be kept in sync with the Amarisoft UE sim configuration file in use!).
Change the parameters to be redcap (release: 17, redcap: "redcap") on
some UEs, and modify the path to the updated configuration.
Specifically, make UE 1 normal (no RedCap), UE 2 RedCap, UEs 3&4 normal,
UEs 5&6 RedCap, etc.
RedCap UEs should now only be able to connect if the gNB is handling Redcap
UEs, which is done in the parent commit.
NR UE NTN: consider acceleration on orbital path to calculate N_UE_TA_drift_variant
The ntn-Config ephemerisInfo contains the SAT position and velocity
vector but not the acceleration vector.
But the acceleration magnitude on the orbital path can be calculated as:
t = 2 * pi * r / v
omega = 2 * pi / t = v / r
acceleration = omega² * r = v² / r
Where t is the orbital period, r is the orbital radius, v is the orbital
velocity, omega is the angular velocity. The acceleration direction is
from the SAT position towards the earth center. To calculate the
acceleration towards the UE, this is projected on the direction from the
SAT to the UE.
This is used to calculate the variable N_UE_TA_drift_variant and improve
the TA accuracy.
Workaround for handling 2 SS0 occasions per slot
Search Space 0 monitoring might depend on SSB. In !3332 this dependence
was removed by moving the configuration of SS0 earlier in a workaround
to avoid a segfault in handover. Now, a new workaround is needed to
handle 2 search space occasions per slot.
As DEBIAN_FRONTEND has been set as environment variable, there is no need to use DEBIAN_FRONTEND=noninteractive inside RUN lines, it is redundant, hence it has been removed.
Libboost went from 1.74.0 to 1.83.0 alongside Ubuntu update.
GCC version is set as default to be more practical.
In Ubuntu22, apt sources were in .list files, in Ubuntu24 they are in .sources files.
Add --break-system-packages for pip installation to use same logic as before, see the pip update 23.0.1 (2023-02-17).
With Ubuntu24 liboai_device requires libpython3.12
Redirecting to a file has the problem that it is difficult in the CI to
recover these files. Furthermore, at least with ninja, when running
build_oai interactively, the build output will only take some lines
(because ninja rewrites lines), so the change should not be that big to
users.
One CI function would print the entire output from build_oai to the
console. Since that output might be long now, do not do this. The file
is archived, anyway.
The acceleration magnitude on the orbital path can be calculated as:
t = 2 * pi * r / v
omega = 2 * pi / t = v / r
acceleration = omega² * r = v² / r
Where t is the orbital period, r is the orbital radius, v is the orbital velocity, omega is the angular velocity.
The acceleration direction is from the SAT position towards the earth center.
To calculate the acceleration towards the UE, this is projected on the direction from the SAT to the UE.
Robert Schmidt