Fix for NTN phy-test mode
- Corrected the initialisation of ntn params changed flag. Before this change on
UE, Phy-test was not running in NTN mode.
- Removed the assert wrt slot > 64 to run FR2-NTN in phy-test
- SIB2, 19 required only in SA mode like SIB1
- Introduced new method to schedule a slot in UL/DL in Phy-test mode. Dmod/ Umod
option in the command line with a value.
- This ensures that the slot n (in slots per frame) will be scheduled if
n % value == 0
- For ex: --Dmod 1 means every slot will be scheduled
- --Dmod 2 means every 2nd slot will be scheduled, like 0,2,4,6 until the
slots per frame 1.
- this can be used for testing FDD FR2 where slots go beyond 64 which is a
limitation of -D/-U option.
the code use a precomputed table of rotations: 16 steaps between -PI/3 and +PI/3
This commit replaces the precomputed table by in code computation.
This version improves code understanding, while it won't make any significant difference
--Dmod option/--Umod option,
for example --Dmod 1 will schedule every slot in slots per frame
--Dmod 3 will schedule every 3rd slot. You can use --Dmod option togethor with -D option
same for uplink scheduling too.
for FR2 with 120Khz scs, there are 80 slots. Removed the assert such that FR2 config
can be tested in phy-test, currently bitmap works only until 64 slots.
Use flat buffer for txdataF in gNB L1
This MR changes txdataF buffer format to hold freq domain data starting from
PRB0 instead of circular buffer that starts from PRB N/2. The motive is to
simplify RE mapping function in L1 and copying data to xran lib.
Added NTN-FR2 FDD bands defined in release 18 in Ka-band range
* NTN-FR2 bands 510, 511, 512 added. TS 38.101-5 v 18.9 defines these 3 FR2-FDD
bands for NTN operation.
* These bands are defined in Ka band range (17.3Ghz - 31Ghz).
* Tested using the added conf files using RFSIM and GEO configuration.
* There were some inconsistencies observed when testing with RFSimulator before UE
Syncs to the gNB in terms of samples being written for FR2 configurations. Once
the UE syncs, the inconsistencies disappear.
* this is the problem - UE writes incorrect number of samples and gNB complains
about getting samples in past
* The above inconsistencies were also fixed in this merge request.
* These commits solving above inconsistencies were removed from this MR and a
different MR was raised. MR with those commits: !3928.
So far txdataF buffer has DC RE as the first element. This was prefered
most likely to avoid memcpy before iFFT but comes with a small
complexity in RE mapping functions.
Instead, we use a flat buffer that holds freq domain data starting from
first negative SC. After resource mapping is done on all channels, each
OFDM symbol is shifted before iFFT so that the buffer start with DC RE.
This reduces complexity in mapping functions and later on when passing
beam IDs to 7.2 split RU especially when a beam is associated to
interleaved RB and/or REs.
There is already a memcpy in place to copy txdataF from gNB stuct to RU
struct. So this change does not introduce new memcpy.
Remove unused function arguments
Some of them, because there are hundreds if not thousands. Warnings at compilation time can be enabled using -Wunused-parameter.
Fix dB_fixed() function
- dB_fixed(0) returns 0 in develop branch;
- 0 in dB is -INF, but since we're dealing with integer variables, we'll put
20*log10(2^-15) in the output of dB_fixed() function, instead of 0.
- make all users use signed variables
Integrate NRPPA and NGAP messages required for positioning
This MR integrates NRPPA and NGAP messages required for positioning.
The following NGAP messages are integrated (3GPP 38.413 Version 16.0.0):
NGAP UPLINK UE ASSOCIATED NRPPA TRANSPORT
NGAP UPLINK NON UE ASSOCIATED NRPPA TRANSPORT
NGAP DOWNLINK UE ASSOCIATED NRPPA TRANSPORT
NGAP DOWNLINK NON UE ASSOCIATED NRPPA TRANSPORT
The following NRPPA messages are integrated (3GPP 38.455 Version 16.7.1):
TRP Information Request
TRP Information Response
Positioning Information Request
Positioning Information Response
Positioning activation request
Positioning Activation Response
Measurement Request
Measurement Response
This MR tests these messages via a standalone tester nr-cu-nrppa-test that
connects to the AMF to perform NGAP enc/dec and NRPPA enc/dec
Core Network:
To pull the docker images:
docker pull oaisoftwarealliance/ims:latest
docker pull oaisoftwarealliance/oai-amf:develop
docker pull oaisoftwarealliance/oai-nrf:develop
docker pull oaisoftwarealliance/oai-smf:develop
docker pull oaisoftwarealliance/oai-udr:develop
docker pull oaisoftwarealliance/oai-upf:develop
docker pull oaisoftwarealliance/oai-udm:develop
docker pull oaisoftwarealliance/oai-ausf:develop
docker pull oaisoftwarealliance/oai-lmf:develop
openairinterface5g$ cd doc/tutorial_resources/oai-cn5g
To deploy:
openairinterface5g/doc/tutorial_resources/oai-cn5g$ docker compose -f docker-compose-positioning.yaml up -d
To undeploy:
openairinterface5g/doc/tutorial_resources/oai-cn5g$ docker compose -f docker-compose-positioning.yaml down -t 0
RAN:
To compile:
openairinterface5g$ mkdir build
openairinterface5g$ cd build
openairinterface5g/build$ cmake .. -GNinja
openairinterface5g/build$ ninja nr-cu-nrppa-test
To run:
openairinterface5g/build$ LD_LIBRARY_PATH=. ./tests/nr-cu-nrppa/nr-cu-nrppa-test -O ../tests/nr-cu-nrppa/nr-nrppa-test.conf
To initiate positioning procedure:
openairinterface5g$ cd doc/tutorial_resources/positioning/
openairinterface5g/doc/tutorial_resources/positioning$ curl --http2-prior-knowledge -H "Content-Type: application/json" -d "@InputData.json" -X POST http://192.168.70.141:8080/nlmf-loc/v1/determine-location
UE: Fix if target cell during handover has SSB at a different offset as in source cell
These changes fixed these observed issues:
- If target cell has a different SSB position compared to source cell during
ho - sync was not successful.
- RAR does not get decoded if SSB position has changed on the target cell
compared to source cell.
0 in dB is -INF, but since we're dealing with integer variables, we'll put 10*log10(2^-30) in the output, which corresponds to the symmetrical maximum output of the function.
Actual problem is that SYNC does not happen on the target cell as frame parameters is not updated
and ssb start carrier is not correct in the UE frame parameters
function nr_get_ssb_start_sc to determine ssb_start_subcarrier
Configure CSI-RS according to beam_id used by UE
This MR is to configure CSI-RS according to beam_id used by UE and
reconfigure upon beam change.
It has been tested with RFSIM, Liteon and Microamp under multiple beams.
GPU Channel Simulation: nr_dlsim/nr_ulsim Integration + CI Test
This MR is a follow-up to !3886 (merged) and extends CUDA-based channel
simulation support to nr_dlsim and nr_ulsim, together with the
corresponding CI tests.
The MR incorporates:
- Cherry-picked commits e0c204f7 and 5f344876 from !3588
- Integration of new CI physim tests using GPU-accelerated channel
simulation in nr_dlsim and nr_ulsim tests, see commit c727b3bb
New CI job: RAN-Channel-Simulation
https://jenkins-oai.eurecom.fr/job/RAN-Channel-Simulation/
Fix compilation error:
/oai-ran/openair1/SIMULATION/NR_PHY/dlsim.c:932:42: error: variable 'h_channel_coeffs' set but not used [-Werror,-Wunused-but-set-variable]
932 | float *h_channel_coeffs = NULL;
| ^
- Introduce usage of the -f option in ulsim to allow enabling specific
feature flags at runtime.
- Add support for the "cuda" flag to enable CUDA channel simulation when
compiled with CUDA support. If an unsupported flag is provided, nr_ulsim
reports an error.
This commit integrates the GPU-based channel simulation pipeline into
the ulsim.
A `--cuda` command-line flag is added to enable the GPU path at
runtime. When activated, the simulator will:
- Allocate all necessary GPU and pinned host memory via the
`init_cuda_chsim_buffers` helper function.
- In the main simulation loop, call the `run_channel_pipeline_cuda`
function to perform the channel simulation on the GPU, bypassing the
CPU-based functions.
- Clean up all CUDA resources on exit using the
`free_cuda_chsim_buffers` helper.
The cpu path is also updated to use multipath_channel_float and add_noise_float.
- Replace previous handling of -f with a generic feature flag option.
- Add support for the "cuda" flag to enable CUDA channel simulation when
compiled with ENABLE_CUDA.
- Remove unused SCGroupConfig file handling (scg_fd) and related code.
- Clean up deprecated code and variables associated with SCG reading - not
required anymore after b232be94ed
Remove L1 dependence from NR band number
L1 band information relied on get_band function that couldn't provide an
unambiguous result. Also there is no SCF compliant parameter for L1 and
generally we don't really need that information in L1.
The MR also remove a RU section that used nr_band but was never really
accessed in NR.
Fix error
openair1/SIMULATION/NR_PHY/dlsim.c:1057:37: runtime error: member access within misaligned address 0x7f8a67e01010 for type 'struct NR_Sched_Rsp_t', which requires 32 byte alignment
Jaroslava Fiedlerova