Instead of guessing what is the absolute timestamp of each symbol returned
from fronthaul, add absolute hyper frame from GPS Epoch to the O-RU. The
O-RU can calculate the absolute sample index from hyper frame reliably
regardless of the frame/slot/symbol ordering.
Add config file for 1x1 O-DU that matches the edited O-RU config.
Signed-off-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
Added oru_south_read_thread that reads samples from vrtsim.
No UL FH processing is done as of this commit.
Signed-off-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
Start O-RU fronthaul library inside the O-RU application and start
reading DL IQ data.
Added configuration elements to the ORUs section to support configuring
the library.
Signed-off-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
Added initialization of frame params according to configuration added
in the new ORUs section. Only one ORU is supported right now.
Added example config that allows starting the ORU and verifying manually
that the config is read.
Signed-off-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
wrong usage of extern declaration in C files, and header cleanup
wrong usage of extern declaration in C files, instead of headers, and
fix hidden bugs by this wrong extern declaration duplication.
this fixes pure bugs because we cast variables to the wrong types, even
if the bug has no consequence
it also separates 4G/5G include files, as the error is also in the
headers mixup. Clean up header includes in F1AP.
Further remove some "CU/DUuniqinstances".
Reviewed-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
1. Beam index:
So far rxdataF and txdataF had beam number as first index to separate freq
domain samples of antenna ports when mulitple beams are served in a slot.
This works fine when the beam is applied to entire symbol / slot but not
suitable for digital beamforming. This commit removes the beam number index
from the data buffers and the buffers hold all the antenna ports in the first
dimension. The antenna port index to be used for each UE in a MU-MIMO or
concurrent analog beam scenario is signalled by L2 via dedicated fields in
the FAPI PDU.
2. Beam ID array changes:
- The gNB and RU struct has a 2D array to hold beam IDs for all symbols in a
frame and all antenna ports. The order is now changes to first: symbol index
and second: antenna port because the RU access all ports' beam IDs for each
symbol / slot at a time. This ordering is optimal for maximizing cache hits.
- The type is now changed from int to uint16_t. So far the L1 had to deduce
the beam number index (done in beam_index_allocation()) from the beam ID sent
by L2 and this is done by initializing the beam_id array to -1 which denoted
no beam id set. Now since L2 explicitely passes the port indices, there is no
need for denoting if a beam id is assigned or not to a slot in L1. And
uint16_t matches with the type used by FAPI to carry beam ID. Since the type
is uin16_t, beam_id array is initialized to 0 and the check for -1 when
passing beam ID 0 to xran is also removed.
3. Number of antenna ports:
The removal of beam index from rxdataF and txdataF buffers resulted in all
antenna ports to be in a single vector. The number of logical ports passed to
L1 is not N1*N2*XP*number of beams per period. The buffer initialization
function is updated to reflect this change. DAS reference config file is
updated in accordance with these changes.
4. oaioran.c:
Remove the check of beam ID = -1 for setting nPrbElm = 0. This is a hack for
LiteON to supposedely improve performance according to Mario. If it's true
then a proper fix would be to pass allocation information from L1 and use it
instead of beam ID.
Signed-off-by: Sakthivel Velumani <s.velumani@northeastern.edu>
Preparatory changes for LDPC CUDA integration
This changeset is preparatory work to merge LDPC CUDA offload in !4097.
Notably, it includes changes for cleaning up some defines, updates to
the LDPC interface, and CI specific changes to prepare for the other MR.
The goal is to merge changes in a first step such that, in a second
step, only the actual LDPC CUDA implementation and ancillary changes
(CUDA memory allocations, CI files, ...) need to be merged.
Reviewed-By: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
Provide the memory buffer size for storing LLRs across HARQ rounds. then
we don't need to check for this in the API users.
Signed-off-by: Robert Schmidt <robert.schmidt@openairinterface.org>
even if 2 codewords are currently not supported and not tested, the way UE handled the possibility of having 2 codewords was messy, in between support and non-support
the intention of this MR is to cleanup the code more than extend the support
Signed-off-by: Francesco Mani <email@francescomani.it>
We already check for number of received samples above after receiving.
When aligned to the slot boundary for synchronization, this length
of the samples is no longer samples_per_slot.
Signed-off-by: Rakesh Mundlamuri <rakesh.mundlamuri@openairinterface.org>
Make sure the radio libs are stopped before `end()` call. This allows
for a cleaner exit under most circumstances. Some libraries like zmq_radio
don't exit cleanly without it.
L1 RX: use queues instead of arrays and linear search for PUCCH, PUSCH, SRS, PRACH
This MR is an attempt to reduce the time L1 RX searches in array for the
next job to process, and instead use a queue. This queue is a FIFO,
because the various jobs (FAPI messages) to process come in order, and
need to be processed in order. The MR (hopefully, to be measured)
reduces the amount of time spent searching for the next UE (because the
next job is always at the beginning of the queue), and should scale
better for many UEs.
It does the following:
- introduce two helper libraries for (1) Frame.Slot calculation (sfn_t),
already introduced in !3521 (merged) commit 3102068e, and (2) a ring
buffer with fixed size
- use sfn_t and ring buffer (gNB->pucch_queue) to remove the linear
array for PUCCH (gNB->pucch)
- use sfn_t and ring buffer (gNB->pusch_queue) for some PUSCH lookups.
Because we need to still store PUSCH contexts, gNB->pusch is still
there
- use sfn_t and ring buffer (gNB->srs_queue) to remove the linear array
for SRS (gNB->srs)
- use sfn_t and ring buffers (gNB->prach_ru_queue and
gNB->prach_l1rx_queue) to remove the linear array for PRACH
(gNB->prach_list)
- some minor cleanups, e.g., additional loops over the PUSCH array,
using const, using pointers instead of indices, etc
Use two queues for PRACH processing:
- prach_ru_queue: pass jobs from TX thread (scheduler) to RU thread. For
split 8, the RU thread itself handles PRACH processing; for split 7.2,
it is the library that is responsible for handling PRACH messages (see
oran_fh_if4p5_south_in())
- prach_l1rx_queue: after jobs have been handled in RU thread, use this
queue to pass jobs to the RX thread. There, preamble detection is
performed, and RACH.indication FAPI messages are filled if a preamble
has been detected.
Together, these queues replace a linear search in a global array that
has been modified by three threads at the same time. The design ensures
that access now is thread-safe, and with less overhead.
Signed-off-by: Robert Schmidt <robert.schmidt@openairinterface.org>
Thread-pool support for TX symbol processing.
This MR adds thread-pool support for TX symbol processing. It allows modulation
/mapping/layer-precoding to run in parallel and offers a speedup of around 3
compared to single-thread execution. This is particularly important for large
bandwidths and 4 or more TX antenna ports where the precoding operation is quite
computationally-intensive.
Please see the description of !3489 for the performance comparison results and
the nr_dlsim timing measurements.
* Add option `--L1s.L1_num_tx_sym_per_thread` for the softmodems and `-Y` for `nr_dlsim`
to provide the number of symbols processed per thread.
It defaults to 0 which makes that every symbols are processed in one thread.
* The last symbol processing task is processed in the L1 TX thread.
Further unused arguments cleanup
More fixes for unused function arguments (see #1057),
add_compile_options(-Wunused-parameter) added in folders:
- nfapi
- openair2
- openair3
- USRP
- rfsimulator
* Global timers were started and stopped
in the TX symbol processing tasks
which is not thread safe
* gNBs nrL1_stats.log now shows
PDSCH generation time rather than
layer mapping and precoding times
Cleanup common_lib.h
This change reduces the number of dependecies of common_lib.h and simplifies
the task of implementing an external OAI radio library.
- all RAN code, CI code, configuration files, dockerfiles, in CSSL v1.0
- all deployment code (openshift, charts, ancillary files like shell
scripts), in MIT
- documentation in CC-BY-4.0
- exceptions might apply and are listed in NOTICE
- there is a new LICENSES folder with all licenses
- CONTRIBUTIONS.md has been updated accordingly
For automated changes based on OAI PL v1.1:
perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.{c,h,cpp}
perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.ts
perl -i~ -0pe 's/<!--.*Licensed to the OpenAirInterface.*openairinterface.org\n.*-->/<!-- SPDX-License-Identifier: LicenseRef-CSSL-1.0 -->/s' **/*.xml
The rest (cmake, files with missing license, cmake) manually.
Remove the \file directive, as it is always superfluous because the
current file is implicit [1]:
> If the file name is omitted (i.e. the line after \file is left blank)
> then the documentation block that contains the \file command will belong
> to the file it is located in.
Author names and e-mails are not relevant for us: it can always be
inferred from git blame, and is often outdated.
Eurecom code has been contributed and was under OAI PL v1.0/v1.1.
For the cpack package contact: put generic email address that is
independent of an individual and that will remain reachable.
[1] https://www.doxygen.nl/manual/commands.html#cmdfile
replace static allocation of max antennas in a dynamic structure for gnb rach
NB_ANTENNAS_RX was used in 5G by mistake
there was also a error in O-RU implementation, with no consequences
(index not in right order)
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.
--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.
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.
params_changed flag is set to true when reconfig.raw file gets processed,
as NTN config is present in reconfiguration.
but due to this initialisation happening at a later point
params_changed is reset which results in incorrect writes on RFsimulator
