Remove the runtime, which is not interesting, and add instead
- test name and if the test failed
- the threshold checks, if any, and
- possible additional information about test failures.
Prior to this change, each test would have, as label, it's description.
This leads to many labels, which are normally reserved for grouping
tests. Move the description into a custom property instead.
Since we rely on the JSON output for the generation of HTML reports, we
need to also extract the description from the generated JSON. However,
custom properties are only logged starting from cmake 3.30. For
back-wards compatibility, write an additional, separate environment
variable TEST_DESCRIPTION from which the description can be read as a
fallback.
For the add_timed_physim_test(), this has been already done in a parent
commit.
The unit tests have been imported with this command:
xmlstarlet sel -t
-m '//testCaseList/testCase[class="Run_Physim"]' \
-v "concat('add_timed_physim_test(physim.5g-offload.',physim_test,'.testX.Y \"',desc,'\" ',physim_test,' ',physim_run_args,')')" \
-n t2_offload_enc_nr_dlsim.xml t2_offload_dec_nr_ulsim.xml >> ../../openair1/SIMULATION/tests/CMakeLists.txt
The next commit will further cleanup this output. I commit it like this
for verification purposes.
Add two new macros that allow to register physim tests for ctest,
including timing thresholds that should be fulfilled.
First, add_timed_physim_test() registers a new test using a helper
script RunTimedTest.cmake. This is because after test execution, we need
to analyze logs, and the recommended way to do multiple steps in one
test is via a helper cmake script:
https://cmake.org/pipermail/cmake-developers/2016-February/027816.html
Second, check_physim_threshold() adds new thresholds. It takes a text to
be parsed, and a condition (e.g., "< 20") to check for the number
following the threshold (which is assumed to be present right after the
threshold). It uses a test property to count the total number of checks
(limiting them to 10), and sets environment variables for the script. I
initially planned to use a test property for checks, but those are only
valid in the same directory, and RunTimedTest.cmake seems to be assumed
by cmake to be "elsewhere", hence I needed to resort to environment
variables.
RunTimedTest.cmake is called through cmake with the test parameters and
checks. It re-constructs a list of checks [1], runs the test, and pipes
the log into a separate script that is passed all checks (see below).
Afterwards, it verifies that both the test and script passed.
A script analyze-timing.sh builds an awk script from the checks passed.
The script analyzes each line of the test output for the threshold, and
compares against the threshold. analyze-timing.sh returns success if all
checks passed.
[1] I did not manage to pass a "list" of checks in a single environment
variable through the check_physim_threshold(), which would be simpler.
Change signature of the macro to take the full test name, a separate
description (previously called a label?), and the executable and test
invocation. The overall signature becomes easier.
The rational for the full test name is that a later commit will
introduce the possibility to define physim tests that are checked for
specific times, in which case we need to reuse the test name. Thus,
using the full name from the beginning leads to more clarity, even
though they are a bit longer.
Add an additional safety check that the given simulator is actually a
target defined within the project (in other words, it actually exists).
Update the documentation correspondingly.
Most (but not all) physical simulators are defined under
openair1/SIMULATION/. Defining physical simulators below there seems to
be the more "obvious" directory anyway, as the physical simulators are
openair1/SIMULATION/tests
Phy(L1) Sim tests => PhySim (tests)
A future commit will enable to deploy physical simulators via docker.
Hence:
- Move the script to run out of deploy_oc_physim(), to make it more
generic (later commits will introduce other scripts)
- pass the working directory (the function will be moved into
cls_oaicitest, as it fits neither cls_containerize nor cls_cluster
when deploying the tests from source)
- not using ci-scripts: don't hardcode a specific path, just use the
working directory
- avoid helm-specific pods summary, and put it into the general "physim
logs"
- remove helm-specific "release", and use a generic name for results
- always log pod logs and status to debug, even if deployment was not
successful or tests did not finish.
Instead of making the function a class member, make it an instance
member because (1) it is more aligned with other functions, notably,
run(), and (2) especially for RemoteCmd() it can be faster, as
successive exec_script() calls do not require a new SSH connection.
The parameter is either set to 10 (the default, so not necessary), or to
0 forcing the gNB to schedule the UE all the time, which is only
necessary in specific scenario, and here simply wrong.
In high throughput UL scenarios, at least with our configuration, the UE
only sends Short BSR. The maximum is 300000 bytes, which is completely
"scheduled away" after a couple of UL grants. Increase the periodic BSR
to 5ms to get more BSR, which results in higher UL throughput.
On BSR reception, reset sched_ul_bytes. This change means that we assume
that no data is "in flight" for this UE at time of BSR reception, or,
put differently, that we overestimate the buffer size at UE (in the
worst case).
To illustrate this, consider the following traces before/after this
change.
Before this change: Upon BSR reception, the estimated BSR of the UE is
reset, but the gNB still accounts for data "in flight". It is visible
that the calculated buffer size (estimated - scheduled) quickly goes to
zero, and we don't use all resources, despite the buffer still being
full. The maximum application throughput in this run was ~220Mbps.
[NR_MAC] SHORT BSR at 773.19, est buf 300000
[NR_MAC] ULSCH/PUSCH: 774. 6 RNTI af8e UL sched 774. 9 PRB start 0:162 TDA 2 TBS 32797 est 300000 sched 152704 est BSR 147296 TPC 1
[NR_MAC] ULSCH/PUSCH: 774. 6 RNTI af8e UL sched 774.11 PRB start 0:162 TDA 4 TBS 7172 est 300000 sched 159876 est BSR 140124 TPC 1
[NR_MAC] ULSCH/PUSCH: 774.10 RNTI af8e UL sched 774.12 PRB start 0:162 TDA 0 TBS 32797 est 292845 sched 185501 est BSR 107344 TPC 1
[NR_MAC] ULSCH/PUSCH: 774.10 RNTI af8e UL sched 774.13 PRB start 0:162 TDA 2 TBS 32797 est 292845 sched 218298 est BSR 74547 TPC 1
[NR_MAC] ULSCH/PUSCH: 774.11 RNTI af8e UL sched 774.14 PRB start 0:162 TDA 2 TBS 32797 est 260117 sched 218298 est BSR 41819 TPC 1
[NR_MAC] ULSCH/PUSCH: 774.11 RNTI af8e UL sched 774.16 PRB start 0:162 TDA 4 TBS 7172 est 260117 sched 225470 est BSR 34647 TPC 1
[NR_MAC] ULSCH/PUSCH: 774.15 RNTI af8e UL sched 774.17 PRB start 0: 35 TDA 0 TBS 7172 est 220236 sched 185501 est BSR 34735 TPC 1
[NR_MAC] ULSCH/PUSCH: 774.15 RNTI af8e UL sched 774.18 PRB start 0:162 TDA 2 TBS 32797 est 220236 sched 218298 est BSR 1938 TPC 1
[NR_MAC] ULSCH/PUSCH: 774.16 RNTI af8e UL sched 774.19 PRB start 0: 10 TDA 2 TBS 2017 est 187508 sched 187518 est BSR -10 TPC 1
[NR_MAC] SHORT BSR at 774. 9, est buf 300000
[NR_MAC] ULSCH/PUSCH: 775. 0 RNTI af8e UL sched 775. 2 PRB start 0:162 TDA 0 TBS 32797 est 260117 sched 147549 est BSR 112568 TPC 1
[NR_MAC] ULSCH/PUSCH: 775. 0 RNTI af8e UL sched 775. 3 PRB start 0:162 TDA 2 TBS 32797 est 260117 sched 180346 est BSR 79771 TPC 1
[NR_MAC] ULSCH/PUSCH: 775. 1 RNTI af8e UL sched 775. 4 PRB start 0:162 TDA 2 TBS 32797 est 227389 sched 180346 est BSR 47043 TPC 1
[NR_MAC] ULSCH/PUSCH: 775. 1 RNTI af8e UL sched 775. 6 PRB start 0:162 TDA 4 TBS 7172 est 227389 sched 187518 est BSR 39871 TPC 1
[NR_MAC] ULSCH/PUSCH: 775. 5 RNTI af8e UL sched 775. 7 PRB start 0:162 TDA 0 TBS 32797 est 180353 sched 173174 est BSR 7179 TPC 1
[NR_MAC] ULSCH/PUSCH: 775. 5 RNTI af8e UL sched 775. 8 PRB start 0: 36 TDA 2 TBS 7298 est 180353 sched 180472 est BSR -119 TPC 1
After this change: The gNB resets the number of bytes "in flight"
(sched). Thus, the calculated buffer is larger, and does not "run out"
before a new BSR arrives (which still indicates the maximum). The UE is
thus allocated all resources, but we might overestimate some resources.
The maximum application throughput in this run was ~300Mbps, limited by
MCS and not by estimated buffer size as in the previous case.
[NR_MAC] SHORT BSR at 43. 3, est buf 300000
[NR_MAC] ULSCH/PUSCH: 43.15 RNTI d3ea UL sched 43.17 PRB start 0:162 TDA 0 TBS 36897 est 263180 sched 36897 est BSR 226283 TPC 1
[NR_MAC] ULSCH/PUSCH: 43.15 RNTI d3ea UL sched 43.18 PRB start 0:162 TDA 2 TBS 36897 est 263180 sched 73794 est BSR 189386 TPC 1
[NR_MAC] ULSCH/PUSCH: 43.16 RNTI d3ea UL sched 43.19 PRB start 12:150 TDA 2 TBS 33822 est 263180 sched 107616 est BSR 155564 TPC 1
[NR_MAC] ULSCH/PUSCH: 43.16 RNTI d3ea UL sched 44. 1 PRB start 0:162 TDA 4 TBS 7941 est 263180 sched 115557 est BSR 147623 TPC 1
[NR_MAC] ULSCH/PUSCH: 44. 1 RNTI d3ea UL sched 44. 3 PRB start 0:162 TDA 0 TBS 36897 est 173698 sched 25881 est BSR 147817 TPC 1
[NR_MAC] ULSCH/PUSCH: 44. 1 RNTI d3ea UL sched 44. 4 PRB start 0:162 TDA 2 TBS 36897 est 173698 sched 62778 est BSR 110920 TPC 1
[NR_MAC] ULSCH/PUSCH: 44. 1 RNTI d3ea UL sched 44. 6 PRB start 0:162 TDA 4 TBS 7941 est 173698 sched 70719 est BSR 102979 TPC 1
[NR_MAC] SHORT BSR at 43.13, est buf 300000
[NR_MAC] ULSCH/PUSCH: 44. 5 RNTI d3ea UL sched 44. 7 PRB start 0:162 TDA 0 TBS 36897 est 292079 sched 36897 est BSR 255182 TPC 1
[NR_MAC] ULSCH/PUSCH: 44. 5 RNTI d3ea UL sched 44. 8 PRB start 0:162 TDA 2 TBS 36897 est 292079 sched 73794 est BSR 218285 TPC 1
[NR_MAC] ULSCH/PUSCH: 44. 6 RNTI d3ea UL sched 44. 9 PRB start 0:162 TDA 2 TBS 36897 est 292079 sched 110691 est BSR 181388 TPC 1
[NR_MAC] ULSCH/PUSCH: 44. 6 RNTI d3ea UL sched 44.11 PRB start 0:162 TDA 4 TBS 7941 est 292079 sched 118632 est BSR 173447 TPC 1
[NR_MAC] ULSCH/PUSCH: 44.10 RNTI d3ea UL sched 44.12 PRB start 0:162 TDA 0 TBS 36897 est 213587 sched 39972 est BSR 173615 TPC 1
[NR_MAC] ULSCH/PUSCH: 44.10 RNTI d3ea UL sched 44.13 PRB start 0:162 TDA 2 TBS 36897 est 213587 sched 76869 est BSR 136718 TPC 1
Instead of only saving this information in the first transmission, also
store it on each retransmission. This should ensure that if some
information changes, we always relate to the last transmission. For
instance, power control information might have changed, and should be
considered in subsequent rounds, if necessary. It also simplifies code.
Fixes: 6294ce715e ("Reorder pf_ul to process retransmission")
In at least the case of mu=1, min_rxtxtime=2 and DDDSU with no UL
symbols (for ULSCH) in the mixed slot, the current state of code does
not allow a UE to attach. This is because at mu=1, Msg3 is k2+delta,
where k2=min_rxtxtime and delta(mu)=3.
Prior, this special case was handled because we had a dedicated Msg3
TDA, which in most cases is not necessary (because the mixed slot
allocates the DCI, and the following mixed slot has the UL grant). Add
code that tries to ensure that we only add the Msg3 TDA in cases when we
need it.
Fixes: 961a646dc7 ("Remove dedicated Msg3 TDA")
Previously, the TDA reuse condition was wrong: for multiple TDAs with
different k2, the symbol allocation might be the same, in which the
previous logic was using the wrong TDA. Fix the condition, and insert an
assert to ensure the allocated TDA is correct.
If the DCI in PDCCH is not correctly received, no PDSCH would be decoded but counted as no error.
Also if the DCI was not correctly received, a TBS of 0 would be used in some computations and memory allocations.
Fix these not counting if there is no PDSCH decoding, and by using the known TBS instead of the one received from the DCI.
This commit broke compatibility with Aerial when compiled with -DSCF_FAPI_10_04_SRS=ON. It was decided that this should become the default.
This reverts commit 8beb382277.
When FHI 7.2 is enabled, the EAL initialization is done by the FHI and
the attempt to init EAL by ldpc_aal will fail.
In that case, it is not necessary neither to provide a DPDK core list
for BBDEV.
This commit offers to skip EAL initialization if it is already initialized
in order to allow dropping the useless DPDK cores argument in that case.
The change relies on `rte_dev_probe` to detect if EAL was already
initialized.
newly-generated files for innermost part of the parity bit
generation which, for AVX512, uses the mm512_permutex2var_epi8
instruction and for 128-bit (aarch64) the mm_alignr_epi8 (vextq_s8) in
the computation corresponding to each non-zero bit of the H matrix.
It is generated with ldpctest -n0 -g1. the changes for this are in a
future MR. I did these changes to compare with the GPU version
(ldpc_encoder_cuda), so that the CPU version is as fast as possible. The
generator will come when we merge the GPU encoder/decoder which also has
a generator for the CUDA version. it was difficult to extract the
changes in ldpctest/ldpc_encoder.c so I just took the generated file.
This allows for removing a very large memcpy and reduces the memory
demand for the parity matrix computation. For the moment this is limited
to largest case in BG1, namely Zc=384. This is the only format used when
the number of segments after codeblock segmentation is large (>8). This
improves the timing required for ldpc parity bits generation by more
than a factor 2 with AVX512. This significantly reduces the total time
to generate the DLSCH/PDSCH
Redirect to files and manual analysis as done in this Dockerfile is not
necessary since we just output all relevant build files to stdout.
Simplify to do the same here.
See: 35361db76b ("build_oai: don't redirect compilations to a file")
- Replaced ITTI message queues with notifiedFIFO for RRC to MAC communication in UE.
- Enables correct message delivery to multiple MAC instances running in parallel threads.
- Introduced `nr_mac_rrc_message_t` union for MAC-RRC messages.
- Updated all relevant message handling and initialization code to use notifiedFIFO.
- Use MAX_NUM_NR_UE_INST in NR UE MAC to control number of MAC instances.
- Modify the MAC interface slightly so that nr_l2_init_ue only initializes one instance
Use MAX_NUM_NR_UE_INST for number of NR UE RRC instances. Change the RRC
interface slightly so nr_rrc_init_ue initializes only one RRC instance pointed
to by the id given to the function
Some code in T tracers is used by both LTE and NR.
In LTE, we expect 10 subframes per frame, and the logging is done with
this assumption. We have one tick per subframe.
In NR, we deal with slots, not subframes. And we have n ticks per frame
(depending on mu). As of today, only n=20 is tested (corresponding to
mu=1).
A previous commit introduced 'subframes_per_frame' which had the correct
meaning for LTE but was truly 'slots per frame' for NR. This creates
confusion.
Let's replace 'subframe' by 'tick' to reduce confusion.
Think: NR with different number of slots per frame depending on mu.
The name 'subframes_per_frame' is a bit ambiguous. It is valid for LTE,
but for NR it should be 'slots_per_frame'.
For example, for sub-carrier spacing of 30KHz, we have 20 slots per
frame, so in this case subframes_per_frame = 20. In reality whatever
the numerology, there is always 10 subframes per frame in NR.
But how to name this variable which is used both for LTE and NR cases?
'subframes_or_slots_per_frame'? It's a bit long and also ambiguous.
Conclusion: no big deal I think. 'subframes_per_frame' and so be it.
The CI detects whether a UE connected (and has a PDU session) by trying
to read the IP address. It therefore assumes that as long as the UE is
not connected, no IP would be present.
With the existing stop_quectel_mbim.sh script, this was not the case; it
would simply leave the IP address. Modify this script to flush all IP
addresses on disconnect to remedy this.
Performance Management support explanation.
Example run modified according to:
- modification of the frequency offset, frame structure, fft size, cyclic prefix, and Tx gain;
- addition of the managed delay node;
for Tx/Rx endpoints.
Introduced a parameter start_up_timing which indicates if PM activation is supported during the start-up
procedure. We initialize this parameter, based on the vendor.
Notification interval is set to 10s.
Definition in o-ran-uplane-conf.yang model:
"Gain correction of RF path linked with array element or array layers.
Common part of overall gain_correction.
gain_correction = common array-carrier gain-correction + eAxC gain correction."
Update the comparator() to properly sort UEs based on their coefficient
by appliey a consistent logic of -1/0/1 (see man qsort) for
smaller/equal/larger. The previous logic was only sorting based on 0/1
(equal/larger), which would result in some UEs with a high coefficient
not necessarily advancing to the start of the list, which could reduce
the likelihood of them being scheduled when they actually should (in
other words, this should improve fairness).
See also: 62e4025bc8 ("Integrate inactivity scheduling into main
allocation loop")
Add a simple RF emulator library with no real RF.
It only synchronizes the gNB with the real time clock.
It is to be used for stress test or benchmarking in phy-test mode.
Replace the unwieldy unix socket implementation of peer information
exchange with an authorative connection descriptor file that
informs the client of the connection method an number of antennas
on the server.
This allows the server to run without the client and allows the
client to reconnect as long as the server is running, as many times
as needed.
Move the channel state management outside the channel implementation.
This simplifies the channel implementation but forces users of the
channel to manage it's state manually.
Add handling for error states in vrtsim which allows to close the
softmodems with CTRL+C without hanging, improving user experience
- Client detection of stale timer.
- Abort state for client and server
Added a libary that can connect to a channel emulator and provide taps
as they are generated.
- Enable connection from vrtsim to channel emulation server
- Depends on flatbuffers definition file from raytracing-channel-emulator
- Depends on libanomsg-dev and flatbuffers-compiler (Ubuntu) or equivalent
- Added a compile time option ENABLE_TAPS_CLIENT to prevent other users
from being affected by additional dependencies
- Allow client to exit cleanly if server is down
- Ensure timing_thread is joined only once avoiding exit_function loop
- Free noise_device
- Save previously sent samples for channel modelling
Interoperability testing with srsRAN DU shows than when receiving
RRCReconfigurationCompleteIndicator in a UEContextModificationRequest
the DU replies in the UEContextModificationResponse with an empty
CellGroupConfig.
This CellGroupConfig is encoded as 2 zero bytes. Let's ignore this
message when we receive it, don't forward it to the UE in a
RRC Reconfiguration, as it should per standard (38.473 8.3.4.2):
If the CellGroupConfig IE is included in the DU to CU RRC Information
IE contained in the UE CONTEXT MODIFICATION RESPONSE message, the
gNB-CU shall perform RRC Reconfiguration as described in TS 38.331 [8].
The CellGroupConfig IE shall transparently be signaled to the UE as
specified in TS 38.331 [8].
To be removed/reworked in the future if the interoperability
situation improves.
This is in 3GPP TS 38.425.
Because it was not done, there was a problem of interoperability
between openair CU and srsran DU. No DL traffic was reaching the UE.
A new GTPU API function is introduced: gtpv1uSendDirectWithNRUSeqNum().
It is only used in the gNB CU, in PDCP. So it was decided to not add a
new parameter to gtpv1uSendDirect() but instead add a new API function.
2 functions with same name as static to make it clearer they are separate.
remove unused copy of log_level global var.
remove threequarter sampling variable from the radio board general
configuration. The decision of sampling rate is made above. A better
behavior can be done later, like ask to the radio board what sampling
rate it can do,then use it to decide the appropiate sampling rate from
the gNB configuration. In UE case, it is another issue, as the sampling
rate would change after we decode SIB1, but also it is not developped
yet.
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")
A previous commit changed to use archiveArtifact() to recover CI logs,
and then attempted to "guess" the L1/MAC stats file name through a
regex. However, the format "enb-[0-9]+" is not correct, as
archiveArtifact() puts the task ID ("[0-9]+") BEFORE the file name
(here, "enb"). So, make it more generic and match the final "-enb.log"
("$" means "end of string").
Fixes: 244ea8fc22 ("Use archiveArtifact() for TerminateeNB()")
Many of these tests exit with an exit code != 0. Thus, the CI
automatically logs the result. Rather, write everything including stderr
to the file for analysis.
Also, rewrite the file with ">" instead of appending through ">>". While
appending works because the CI removes files after archiving, it seems
"cleaner" to remove files.
It is superseded by the CreateWorkspace() function and task step (which
removes and recreates a workspace), and this option was not actually
used in any function except for the build of unit tests, but no XML
step actually specified this option.
After having transitioned to direct node names in the XML, these
parameters are not relevant anymore.
The best way to view this patch is with
git show <SHA> --ignore-all-space
Remove this class. It is not safe to use (no return codes, can get out
of sync), hardcodes the use of passwords, and it's API is cumbersone.
More explanations can also be found in !1867. It is superseded by
cls_cmd.py
Since 28ce0dc444 ("Main: pass in ctx"), the CI always collects logs
into cmake_targets/log/. Hence, LogCollecteNB() is never called. We can
remove it.
Further, change the cmake_targets/log/ to ci-log/, which is shorter, and
append a / on the zip path to make sure that only contents is zipped.
Reimplement these functions by
- using cls_cmd
- retain only the necessary steps from the timing-phytest function
- pass in ctx and node information, instead of server ID
- remove all superfluous variables that don't seem to be used
- make some lists (corresponding indices are "server ID") into normal
variables.
Pass node directly from XML to these functions
- BuildClusterImage()
- BuildImage()
- BuildProxy()
- BuildRunTests()
instead of reading the "server ID" and looking up from
eNB_IPAddress/eNB1_IPAddress/eNB2_IPAddress.
Improve the proxy build unit test by properly passing ctx information.
build_oai primarily builds UHD for OAI. Thus, a number of targets (B100,
USRP1/2, ...) can be omitted, as OAI does not run on them. Further,
disable documentation and man pages, which is typically not necessary
for the averages user, and does not need to be installed for containers.
Similarly to the parent, don't redirect log files to a file. It makes
the CI more complicated, and also raises user awareness of what is being
installed.
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.
Increase the number of aggregration level candidates. Since we have many
UEs with concurrent traffic in that pipeline, we should ensure that we
can allocate many DCIs to not waste resources (e.g., not all RBs used
because could not find DCIs for specific UEs).
Add the possibility to use UL slots in TDD pattern 2. For simplicity, we
require the mixed slot to be of the same symbols in pattern 1 & 2. For
UL slots, simply use the right amount of UL TDAs, depending on which
number of UL slots among pattern 1 & 2 is bigger.
One complication is the TDA for the mixed slot. The current code assumes
that k2 has to be equal or larger than (number of DL slots +1) (because
the spec says min k2=2, but we might want to schedule DSUUU). Then,
there could be for instance the following cases:
- only pattern 1: DSUUU DSUUU ...: the mixed slot has to be reached an
entire period in advance
- pattern 1 & 2: DSUUU DDDDD: normal mixed slot k2, e.g., like for 7DS2U
- pattern 1 & 2: DSUUU DDDSU: the mixed slot has to be reached
N_ul2+N_dl1+1 slots in advance
I can't think of more cases right now. To avoid unscheduled slots, I put
an assertion (which could also trivially be taken out).
Adds the capability to pack/unpack the TDD table in CONFIG.request
following both SCF222.10.02 (Tag 0x1027) and SCF222.10.04 (Tag 0x1035)
formats In the case of Aerial, the TDD table is packed following the
10.04 format, but with the 10.02 tag Prevent the packing of Digital
Beamforming table and Precoding Matrix table for Aerial
A new function get_best_ul_tda() allows to select the "best" TDA out of
a number of TDA. Specifically, get_best_ul_tda() considers in how many
RBs a given TDA might be allocated, and multiplies this number of RBs
with the number of symbols in the TDA to form a "score". The TDA with
the best "score" is selected, considering it maximizes resource usage.
In phytest scheduler, we use this function to verify that the given TDA
can be really allocated in all selected slots.
Schedule SRS longer in advance, so that it would also be enough even
with big k2 for UL TDA.
Remove useless types: we do not use the information on sched_srs
anymore, so remove it.
Check that the VRB map is free before making allocations.
Since the parent commit, the TDA for UL scheduling is dynamically
selected, instead of being hardcoded to specific indices. We can thus
also omit the SRS TDA if no SRS is configured.
Also add SRS-specific TDAs if we schedule further into the future.
Add multiple TDAs with k2 larger than the min_rxtxtime, to potentially
allow to allocate all available slots. For this, nr_rrc_config_ul_tda()
inspects the TDD pattern, and allocates as many TDAs as necessary. It
also sorts the TDA list, with smaller k2 and larger symbol lengths
first.
This in turn is now used by get_num_ul_tda() to use a k2 and the slot
configuration to find a suitable TDA, assuming a list as sorted in
nr_rrc_config_ul_tda().
Note that since get_num_ul_tda() does only inspect the available UL
slots, there might be overlap (e.g., when scheduling SRS), which will be
fixed in a follow-up commit.
Also, TDD pattern 2 is not handled here yet, and a follow-up commit will
fix it.
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.
A dedicated Msg3 TDA is simply not necessary: get_feasible_msg3_tda()
already iterates through all TDAs to find a suitable one for Msg3, and
takes things such as parameter Δ already into account.
The only prerequisite is that the ra_ResponseWindow is long enough. In
some configurations, Msg3 TDA ensured that Msg2 still happened during
ra_ResponseWindow, while Msg3 was outside of it. This is not necessarily
the case anymore, unless ra_ResponseWindow is long enough.
For the normal user, removing ra_ResponseWindow from the config will be
enough.
Since the parent commit, the ra_ResponseWindow will be chosen
automatically. Correspondingly, remove most ra_ResponseWindow options
from configuration files in the repository.
One problem in some mu=1 configs is that the ra_ResponseWindow=4 (10
slots), which might be overly restrictive if the L1 slot ahead is
somewhat close to 10 (e.g., 6), in which case we might not be always
able to allocate Msg2 in time.
A notable exception here is gnb-vnf.sa.band66.u0.25prb.nfapi.conf, in
which we still provide it (1) since it uses a non-standard configuration
of a ra_ResponseWindow longer than 10ms (see also issue #916 for more
information) and (2) as an example.
If the config file does not specify ra_ResponseWindow, select it to be
10 slots in mu=0, or 20 slots for all others.
This should give us enough flexibility to allocate Msg2 without running
out of the response window. The next commit will remove most
ra_ResponseWindow options in configs.
Scheduling for inactivity only deviates in details from the main
scheduling logic: we simply allocate a fixed number of RBs instead of
making it dependent of data.
In this commit, add an additional flag to sort UEs that are scheduled
for inactivity in front of "normal" UEs (with traffic). Then, schedule
those UEs by limiting/fixing the amount of RBs to schedule to
min_grant_prb.
Update the comparator() to properly sort UEs based on this flag and the
coefficient by applying a consistent logic of -1/0/1 (see man qsort) for
smaller/equal/larger. The inactivity flag, if set, will always have
higher priority over the coefficient to schedule these UEs first, as was
the case prior to this commit.
Remove sched_ctrl->sched_ulsch, and call the post-processing function
post_process_ulsch() in the places where sched_ctrl->sched_ulsch has
been assigned. This will have two effects:
- it is not necessary to have the final loop over all UEs, which might
be costly especially towards many UEs.
- till now, there is only a single sched_ulsch; however, a later commit
will allow to schedule multiple PUSCH transmissions from a single (DL)
slot. This would require to make sched_ctrl->sched_ulsch, and
also iterate through all sched_ulsch. In this new scheme, we can
simply call post_process_ulsch() multiple times, which is simpler (and
therefore, implicitly handleded as of this commit).
Write a single NR_sched_pusch_t structure in a single statement (where
possible). Assign to sched_ctrl->sched_pusch later, where the
post-processing functionality will be called in a follow-up commit.
Write a single NR_sched_pusch_t structure in a single statement (where
possible). Assign to sched_ctrl->sched_pusch in one place, where the
post-processing functionality will be called in a follow-up commit.
Avoid to overwrite the existing retInfo. Instead, create a new
NR_sched_pusch_t and assign to sched_ctrl->sched_pusch in one place. A
follow-up commit will directly trigger the post processor here.
Write a single NR_sched_pusch_t structure in a single statement (where
possible). Assign to sched_ctrl->sched_pusch in one place, where the
post-processing functionality will be called in a follow-up commit.
PF uses MCS and average throughput to decide which UE to schedule. Thus,
the first loop selects the MCS, and the second does the main UE
allocation after sorting by priority, depending on the MCS.
A follow-up commit will remove sched_pusch from NR_UE_sched_ctrl_t.
Thus, we cannot rely on sched_ctrl to store the MCS in the first loop,
and look it up from there in the second. Instead, store it as part of
the UE iterator data, and take it from there.
A later commit will remove sched_ctrl->sched_pusch. Instead, the TX
power is also stored for each HARQ process (as they contain
sched_pusch). Read it from there, which should have the same effect.
Introduce an array with information on FAPI structures to save resource
allocation into. It's in nr_mac_gNB.h because the next commit reuses
this for all preprocessors.
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
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.
Variables 'harq_pid', 'ulsch_id' and 'C' of the segment decoder
interface were not used any more by the implementations and set to zero
by all the callers.
Then it is more relevant and compliant to remove them.
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.
DC subcarrier has a significantly higher energy compared to other CSI IM
resource elements. This causes the average interference + noise
estimation to be higher than CSI-RS signal power making the CQI 0. With
a third-party gnb that schedules PDSCH based on CQI, the UE never
receives DL DCI once it starts sending CSI reports.
Sometimes the connection fails because of the reboot. Without may_fail,
it would stop the build, which will then run the wrong code, possibly.
Instead, continue; if there is a problem with USRP, it will be visible
when starting nr-softmodem.
I have to make both together, since they both depend on
AnalyzeBuildLogs().
- remove mkdir for legacy sub-logfiles in build_oai, that does not exist
anymore; also, remove corresponding log analysis, I think we don't use
it and it is overkill (either build works or not)
- manually try to copy "all.txt"
- explicitly list log files to copy, then analyze
- AnalyzeBuildLogs(): pass log files to inspect explicitly
Set the context for each task step. Set the artifact result path based
on the XML, so it is harmonized; currently, most pipelines use the "YAML
path" of docker-compose, but that does not always make sense. For
instance, Ping/Iperf() needs to look up this path, but does not
inherently belong to one specific YAML path (there might even be more).
This class provides a generic "context" for individual tasks about the
current task step, and where to log results. It's used by
archiveArtifact() that would automatically log files in the right
directory, based on a directory in the context, and in a way that order
of files is preserved for long-running pipelines.
Note: this does not actually work. In the pipelines, we see that for
some reason, quectel-CM cannot establish a connection. Manually, it
works though(?)
It is not necessary (the final undeploys at the end are "always_exec"),
and makes the CI potentially fail since there is nothing to copy at this
point.
check for IP once before sleeping in case UE IP address exists, which
should speed up the CI. With this, Only print the actual attach command
once. Print errors only at the beginning. This should simplify attach
command output logs.
Rename the library to reflect that it's more a generic AAL driver than
specifically for AAL. To this end, rename some documentation.
As of this commit, the options are still called nrLDPC_coding_t2. The
next commit will correct this.
Co-authored-by: Xin Zhe Khooi <khooixz@comp.nus.edu.sg>
The CI fails sometimes, because some processes/threads are created in
unpredictable order and if the client connects before the server is
ready some tests fail, as seen in the following log:
[UTIL] client/server iq-samples: launch sub-processes
[UTIL] threadCreate() for time client: creating thread (no affinity, default priority)
[UTIL] time manager configuration: [time source: server] [mode: client] [server IP: 127.0.0.1} [server port: 7374]
[UTIL] time client: connection to 127.0.0.1:7374 failed, try again in 1s
[UTIL] threadCreate() for time source iq samples: creating thread (no affinity, default priority)
[UTIL] threadCreate() for time server: creating thread (no affinity, default priority)
[UTIL] time manager configuration: [time source: iq_samples] [mode: server] [server IP: 127.0.0.1} [server port: 7374]
[UTIL] client/server: rlc ticks: 1000 pdcp ticks: 1000 x2ap ticks: 1000
CMDLINE: "/oai-ran/build/common/utils/time_manager/tests/test_time_manager_auto" "--time_management.mode" "server" "--time_management.time_source" "iq_samples"
[UTIL] client/server: rlc ticks: 0 pdcp ticks: 0 x2ap ticks: 0
CMDLINE: "/oai-ran/build/common/utils/time_manager/tests/test_time_manager_auto" "--time_management.mode" "client"
[UTIL] client-server iq-samples: ERROR
The client/server iq-samples test is started.
Then we see this log:
[UTIL] time manager configuration: [time source: server] [mode: client] [server IP: 127.0.0.1} [server port: 7374]
Which means that the client is running.
It tries to connect to the server (not running yet), but fails, so sleeps
for 1 second before attempting another connection to the server:
[UTIL] time client: connection to 127.0.0.1:7374 failed, try again in 1s
The sleep is done by the time_client thread, the main thread of the test
program continues and does a sleep(1).
Then the server arrives:
[UTIL] time manager configuration: [time source: iq_samples] [mode: server] [server IP: 127.0.0.1} [server port: 7374]
It sends all the ticks (to no client, since the client is still sleeping).
Then the test is over, the sleep(1) of the client finishes and the program
exits. The client never connected to the server.
We have this log:
[UTIL] client/server: rlc ticks: 0 pdcp ticks: 0 x2ap ticks: 0
And the test fails.
It's complicated to write an automatic test involving several uncoordinated
programs. The operating system may create processes in any order. We use
some sleeping to wait, but it may be too short or too long, leading to test
failure.
Let's see with more sleep if the CI fails less.
Changed the search structure to have periodic resoruce id in the outer
loop and configured resource set as inner loop to prevent configuring
resource that is not needed.
Use const for input pointers.
- Add helper function to normalize bitrate values to Mbps for calculations.
- Add helper function to extract data from iperf test report.
- Clean up the UDP analysis function, improve test report formatting.
- Fix an issue where Gbps values were incorrectly reported due to inconsistent
unit parsing.
- Update CI unit test report checks to match the new formatting.
Remove these F1-C port numbers. The configuration is not actually
applied, and the default F1-C port number 38472 (see F1AP_PORT_NUMBER)
is hardcoded in the F1 module.
For the moment, I leave the configuration option, in case we want to
allow to configure the port numbers later).
Make a common pattern, which makes it simpler to find them in gNB logs,
and, maybe more importantly, link tunnel creation and update (the update
message was missing the "incoming" TEID, so it is not easy to link to
creation apart from the UE ID, but even then the UE might have multiple
tunnels).
Reuse the gtpv1u_bearer_t for internal functions. Hopefully this will
also simplify implementation of IPv6, as it encapsulates IP address
handling within gtpv1u_bearer_t.
The (remote) port number of the GTP module is configured during
initialization. It is therefore not required when calling
newGtpuCreateTunnel(), and could even lead to bugs (if another port
number is used than specified during GTP init).
This is a simple CU-UP load tester. It sets up a configurable number of UEs in the
CU-UP, then sends GTP traffic in downlink/uplink in the N3-F1/F1-N3
direction at the CU-UP. It then compares the sent and received data.
Additional parameters, such as amount of traffic, test length, packet
size, and IP addresses/ports are configurable.
To run:
mkdir build && cd build && cmake .. -GNinja && ninja nr-cuup nr-cuup-load-test params_libconfig
./tests/nr-cuup/nr-cuup-load-test
./nr-cuup -O ../tests/nr-cuup/load-test.conf
The tester should be able to detect lost and reordered packets.
Example lost: Receive order 2,3,5,6 (lost packet 4)
=> on packet 2, expected 2, next=expected+1=3
=> on packet 3, expected 3, next=expected+1=4
=> on packet 5, expected 4, diff=5-4=1 (lost 1), next=payload+1=6
=> on packet 6, expected 6
=> 1 lost
Example reordered: Receiver order 2,5,3,6 (lost packet 4)
=> on packet 2, expected 2, next=expected+1=3
=> on packet 5, expected 3, diff=5-3=2 (lost 2), next=payload+1=6
=> on packet 3, expected 6, (reduce lost by 1 to 1), next=expected=6
=> on packet 6, expected 6
=> 1 lost
Example reordered: Receiver order 2,5,3,4,6 (no losses)
Avoid the include gtpv1_u_messages_types.h, as this pulls in e.g., LTE
RRC definitions. The CU-UP load tester integrated in one of the
following commits should be able to build without LTE RRC, if it was for
GTP. Unfortunately, ITTI also pulls in LTE RRC, so it's also somewhat
useless...
Put some forward declarations instead. That also shows that the API is
unnecessarily complex, and would need some cleanup.
Remove sctp from all other targets, since we use sctp::sctp on
SCTP_CLIENT (would fail if it does not exist), and SCTP_CLIENT already
fulfils the SCTP dependency.
- Provide some documentation
- Make cmake keywards and sctp lib name lowercase
- Use standard form of find_package_handle_standard_args()
- Make an imported target sctp::sctp that will fail if being used in
cmake unless defined, which will avoid that "sctp" appears in the
cmake code but is silently discarded
See also:
https://cmake.org/cmake/help/latest/manual/cmake-developer.7.html#a-sample-find-module
Move the path to the beginning, so that we can use it early.
Specifically, it was after the SCTP module, and the next commit will use
the Findsctp.cmake module to find SCTP. Use the cmake-proper variable.
The boolean value v17_sib was not set to true when allocating si_schedulingInfo_v17 and schedulingInfo2_r17.
So multiple Rel-17 SIBs would lead to multiple allocations and only the last SIB being actually configured.
Fix this by removing the redundant v17_sib variable and directly check if the memory was already allocated.
Also move the definition and allocation of si_schedulingInfo_v17 closer to its actual usage.
Now that we reliably receive SIB19, we can set the ntn-UlSyncValidityDuration-r17 to a sane value
and thus make sure that the UE always has up-to-date SIB19 information.
After RRCSetup, until RRCReconfigurationComplete, gNB continues to schedule ULSCH using DCIs in a common searchspace.
In theory, the UE should decode DCIs in:
<downlinkBWP-ToAddModList>
<BWP-Downlink>
<bwp-Common>
<pdcch-ConfigCommon>
<setup>
<commonSearchSpaceList>
...
</commonSearchSpaceList>
However, due to the limited amount of time to investigate this issue, the easy way I found to get DCIs decoded in common searchspace of a DedicatedBWP was by adding a common searchspace in the bwp-Dedicated:
<bwp-Dedicated>
<pdcch-Config>
<setup>
<searchSpacesToAddModList>
<SearchSpace>
...
</SearchSpace>
</searchSpacesToAddModList>
This way, let's call it a workaround.
There is a removal of the NR_SearchSpace__searchSpaceType_PR because, at this point, the gNB already selected the searchspace and it calls this function only to find the coreset with controlResourceSetId based on the previously searchspace id selected;
There is no need to send a pointer to the entire searchspace structure because we only need the controlResourceSetId: NR_ControlResourceSetId_t coreset_id = *ss->controlResourceSetId;
It also prevents a segmentation fault, in develop when NR_SearchSpace__searchSpaceType_PR_common because gNB calls sched_ctrl->coreset = get_coreset(nr_mac, scc, bwpd, sched_ctrl->search_space, target_ss); the bwpd is NR_BWP_DownlinkDedicated_t *bwpd = NULL; and is it incompatible with the cast to NR_BWP_Downlink_t in coreset = ((NR_BWP_Downlink_t*)bwp)->bwp_Common->pdcch_ConfigCommon->choice.setup->commonControlResourceSet; this was never noticed until now because gNB barely used NR_SearchSpace__searchSpaceType_PR_common
Following frequency change in the pipeline, we observed degraded UL channel
conditions resulting in low UL throughput. Increasing attenuation on the gNB
side was found to mitigate this issue by improving UL channel quality
and reducing UL noise power.
Increase tested UL and DL bitrates in OAIUE pipeline.
Tell strncpy() the size including the NULL byte to make sure we copy all
data.
This just fixes these warnings:
openair3/NAS/TOOLS/conf_usim.c: In function ‘gen_usim_data’:
openair3/NAS/TOOLS/conf_usim.c:191:17: warning: ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
openair3/NAS/TOOLS/conf_usim.c:190:53: note: length computed here
openair3/NAS/TOOLS/conf_usim.c:195:17: warning: ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
openair3/NAS/TOOLS/conf_usim.c:194:54: note: length computed here
add copy with limited size and truncate properly with null C string termination.
As clang-format doesn't handle tab indented files and as it is not the
OAI coding rule, the entire file is re-indented with present OAI coding
rule.
TS 38.213 4.1 says coreset 0 is present only if kssb < 24 for FR1 and <
12 for FR2. This commit sets get_sib1 flag based on kssb.
Also, setting of mac state is taken out of function nr_ue_decode_mib().
The LLR threshold buffers hold only for one symbol but the LLRs are
computed for all symbols together. So only the threshold of last symbol
was used for computing LLR for all other symbols.
This commit calls nr_dlsch_llr for each symbol togther with rest of
nr_rx_pdsch() and calls nr_dlsch_layer_demapping at the last symbol.
Fixes issue 948.
Recently f buffer was changed to hold packed bits and the correspoinding
change in dlsim was not done so the number of error bits before decoding
was incorrectly reported. This commit fixes it.
Pre-initialize this variable. It should be set in pucch2x_scrambling(),
but the compiler warns with
In function ‘pucch2x_modulation’,
inlined from ‘generate_pucch2x’ at oai/openair1/PHY/LTE_UE_TRANSPORT/pucch_ue.c:425:3:
oai/openair1/PHY/LTE_UE_TRANSPORT/pucch_ue.c:361:18: warning: ‘btilde’ may be used uninitialized [-Wmaybe-uninitialized]
361 | d[i] = btilde[i] == 1 ? -amp : amp;
oai/openair1/PHY/LTE_UE_TRANSPORT/pucch_ue.c: In function ‘generate_pucch2x’:
oai/openair1/PHY/LTE_UE_TRANSPORT/pucch_ue.c:387:11: note: ‘btilde’ declared here
387 | uint8_t btilde[20];
Remove the --usim-test option: to my knowledge, it's not used by users,
and is misleadingly placed in various places where there should not be a
difference w.r.t. USIM configuration.
When making the changes, I assumed that --usim-test would be 0 (the
default), which is the case in all executables when not specified in
options except for the nr_dlsim, nr_pbchsmi, nr_ulsim simulators.
The only exception is the initialization of PDCP from the MAC, which is
not correct (the PDCP is in the CU, so it does not make sense to call it
from the MAC which is in the DU). Instead, always initialize from main,
even in the NSA case (NSA was covered by the incorrect initialization
from MAC).
This in turn let to some more cleanup around function du_rlc_data_req().
After receiving GTP packets at the DU, they were given to the PDCP to
enqueue the packet at RLC. This does not work anymore, since the PDCP is
not initialized; it also does not seem necessary, as this enqueue
functionality is necessary to decouple PDCP and RLC to avoid deadlocks
in monolithic, but in split-mode, this cannot happen. Instead, call
directly into the RLC when receiving GTP packets.
It provides and overview about the Architecture, Requirement Packages,
Configuration Files, How to run Data Recording Application, and an
Overview on Collected Data Set.
The data recording App includes the following files:
- The main app: data_recording_app_v1.0.py that has the data control service, interact with tracers, and data sync and conversion service
- The configuration file: common/utils/data_recording/config/config_data_recording.json
- The wireless dictionary file: common/utils/data_recording/config/wireless_link_parameter_map.yaml
- The SigMF Interface (common/utils/data_recording/lib/sigmf_interface.py) to store recorded data and meta-data in SigMF format
- A simple script (common/utils/data_recording/sync_validation_demo.py) to validate that the recorded bits from gNB and UE are in Sync
- For more info look to doc/data_recording.md
A squashed commit further updates:
- Enhance Data Recording App structure
- Support the new state machine of T-Tracers
- Add new files for Config Interface, sync Service, def of data recording messages, and common utilties
- Make part of logging on Terminal configurable
- Add _tracer_app_gnb and t_tracer_app_ue apps to common/utils/T/tracer/Makefile
- Add Data collection Service for gNB: common/utils/T/tracer/t_tracer_app_gnb.c
- Add Data Collection Service for UE: common/utils/T/tracer/t_tracer_app_ue.c
- Add Shared memory configuration (common/utils/T/tracer/shared_memory_config.h),
since We will have too much memory consumption on the stack if the
T-tracer is not fast enough to process the traces or if we have too
much traces. As a result, tracers start to capture data, write data in
shared memory, then close the T-Tracer after getting the recording of
N slots
- Support the operation of : COnfig, Record, and Stop
- Poll from Socket and not use get_events to mitigate long-time waiting
if there is no data in buffer or the UE is already released or crashed
- Add extra offset to improve data sync
- Update input parameters to nr_ulsch_encoding () in
nr_transport_proto_ue.h to get number_dmrs_symbols to be added to
meta-data.
- In nr_ulsch_coding.c: Trace UE PHY UL Payload TX bits (T_message:
T_UE_PHY_UL_PAYLOAD_TX_BITS) including related meta-data and UTC time.
- In nr_ulsch_ue.c: Trace UE PHY UL Scrambled TX bits (T_message:
T_UE_PHY_UL_SCRAMBLED_TX_BITS) including related meta-data and UTC
time.
- Fix the input prameters in nr_ulsch_encoding () called in
(openair1/SIMULATION/NR_PHY/ulschsim.c) since a new input parameter
has been added.
- The required memories have been created and initialized in:
openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
- Those memories: memory for DMRS signals, memory for channel estimates
based on DMRS positions, memory to store slot grid with channel
coefficients based on DMRS positions after interpolation, and memory
to store extracted data including PUSCH + DMRS.
- The input parameters to nr_pusch_channel_estimation() has been updated
to get the pointer to the added memories of pusch_dmrs_slot_mem and
pusch_ch_est_dmrs_pos_slot_mem
(openair1/PHY/NR_ESTIMATION/nr_ul_estimation.h)
- The DMRS grid of NR slot and the estimated channel coefficients at
DMRS locations are logged to created memories in:
openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
- The function inner_rx in
openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c is updated to log
the extracted ULSCH PRBs and the interpolated channel coefficients.
- The T-macro() has been called in
(openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c) to trace added
traces: T_GNB_PHY_UL_FD_DMRS, T_GNB_PHY_UL_FD_CHAN_EST_DMRS_POS,
T_GNB_PHY_UL_FD_PUSCH_IQ, T_GNB_PHY_UL_FD_CHAN_EST_DMRS_INTERPL
bridge->nb_cnx++ is done before calling snprintf(modelname,... in the function,
so we take the model name of the next channel. This commit corrects the issue by
using bridge->nb_cnx - 1, ensuring that the model name corresponds to the currently
connected client.
This bug was introduced by MR !3455.
Co-authored-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
Co-authored-by: Laurent THOMAS <laurent.thomas@open-cells.com>
RAN-Container-Parent uses Jenkinsfile-GitLab-Container, which only
triggers sub pipelines, then collects their results. However, if a sub
pipeline did not generate an artifact, the result was skipped. It would
also not show it in the automatically generated result page, when it
should.
Remedy this by automatically generating a file with a link to the
pipeline if the artifact could not be retrieved, which
1. Will give a link, which is easier for developers to follow to the
pipeline than manually clicking through Jenkins,
2. Makes the failed pipeline appear in the list of failed pipelines.
Build and run OAI physims with DPDK version 22.11 for testing with the latest
T2 firmware release. Environment variables PKG_CONFIG_PATH and LD_LIBRARY_PATH
are set to point to the custom installation path of DPDK v22.11.
This commit reduces the UL throughput target in the 2x2 test to align
with the host’s performance capabilities. The adjustment ensures more
reliable and consistent CI results.
Based on observations from testing on acamas, the interval between DL
disruption and the UE synch check needs to be increased - the UE takes
longer to go out of sync . A sleep of 15 seconds has proven to be a
reliable value to ensure constant results.
Add SYS_NICE capability to enable setting thread priority and affinity
in rfsim5g tests. This improves execution speed in test cases with
heavier processing workloads.
When migrating from RHEL (on cacofonix) to Ubuntu 22.04 (on acamas), the `nc`
command needs to be replaced by `ncat`. The version of `nc` available on Ubuntu
is the OpenBSD variant, which lacks support for some options used in our scripts.
`ncat` from the Nmap is used instead.
Previously, we only supported intra-frequency handovers, so the
measurements where only for intra-frequency, reusing the same
measurement object. Now that we would support inter-frequency handover,
also add multiple MeasObjects for each neighbor.
Add some helper functions that will be used by the MAC handler to fill
the right MeasGap configuration based on Measurement Configuration sent
by the CU, in the next commit.
When a downlink SDU was discarded by the RLC Acknowledged Mode entity due to a full transmit buffer (tx_maxsize), the drop statistics were not being updated.
The `txpdu_dd_pkts` and `txpdu_dd_bytes` counters remained at 0.
It should be noted that while the statistics are named `txpdu_dd_*`, the drop at this stage occurs at the SDU level.
rx_list is replaced by an array of size 2^(SN size - 1)
which is 131072 for an SN size of 18 bits, leading to
1048576 bytes of memory used. (Less for smaller SN sizes.)
A lot of RX processing was to run through rx_list. When the list was
big (with some non-ideal channel), it can take some time. Removing this
list should improve things. Checking with benchmark_nr_rlc_am_entity
a speedup of more thant x10 is achieved (except for the case 1024 which
is surprisingly faster than the others in the develop branch).
The only thing that may be slower is when looking for cur->next where
the SN is different, in which case we need to look for all SN one by
one until we find something or reach the limit (rx_highest_status).
These are the functions get_first_rx_pdu() and get_next_rx_pdu().
The changes done in this commit are to contribute the supporting changes
for the existing "Initial support for RedCap" feature in gNB.
In this patch, handle and store the RedCap related IE's present in "NR
UE Capability Information" msg which are
- 'supportOfRedCap-r17'
- 'supportOf16DRB-RedCap-r17'
- 'longSN-RedCap-r17'
- 'am-WithLongSN-RedCap-r17'
use 'longSN-RedCap-r17' and 'am-WithLongSN-RedCap-r17' IEs to set the SN
length to either 12 Bit or 18 Bit accordingly.
Fix concurrency issues happening when a new client connects, sometimes
leading to a total softmodem deadlock.
Key changes:
- Fix sample sending on new client connection: send the first
sample only to the newly connected client.
- Remove the --rfsimulator.hanging-workaround option
- Replace global nb_ue and Sockmutex with nb_cnx and Sockmutex
in rfsimulator_state_t for better concurrency and clarity.
Add nr_fapi_p5 library to the simulators common library for access to the utility function `copy_config_request`
Add dummy VNF/PNF functions to be referenced by lte-softmodem, before LTE and NR implementations of the VNF/PNF are separated
Add a section in nfapi.md related to the different transport mechanisms available for VNF/PNF communication
Edit NR_NFAPI_archi.md to describe the VNF and PNF processing logic, as well as adding a flowchart for each of the components execution
Add the necessary patch to install the WLS library in the system
Checks whether there are at least 4 bytes available to pull tag and length values.
On tlv_list unpack, if the size is sent as 0, immediately exit the function
Created a function nr_error_ind_cb for the VNF that takes a received ERROR.indication and shows some details regarding the reported error from the PNF, since up until now it was not handled and treated as an unknown message.
Proper error handling procedure not created, only shows that the error occurred.
Remove duplicated functions in fapi_vnf_p7.c, leaving only functions for messages that require usage of the secondaty data_buf for unpacking
Move vnf_info struct declaration to nfapi_vnf.h to be available in fapi_nvIPC.c
Add check to vnf_nr_handle_param_response for when phy_info is not found
The WLS VNF is in charge of Enqueueing the used blocks after usage for transport, this is done by keeping track of all blocks used, and calling WLS_Enqueue for all of them upon receiving a SLOT.indication
The common library exposes functions for the PNF to return the received blocks to the VNF for it to call WLS_Enqueue on them.
This is done in order to ensure the Blocks are returned after processing, also preventing the Dequeueing of blocks that are still being used, i.e. the internal value is not -1
All saved blocks are to be enqueued at the reception of a SLOT.indication by the VNF
Additionally, the definition of NFAPI_MAX_PACKED_MESSAGE_SIZE was moved to nfapi_interface.h and removed from the other headers, this is done to allow to set the maximum message size when using WLS by only changing the value in one place
Fixup fapi_nr_message_header_unpack call in nfapi_hex_parser
Switches the used socket type in pnf_interface.c and vnf_interface.c.
These values must always be the same in both components so the same socket type is used in both
Adds 3 new function pointers to the P5 and P7 VNF structures, allowing to configure which function to use to pack/unpack the messages, as well as unpack the message header, being then used seamlessly regardless of using the FAPI or nFAPI functions.
Adds 3 new function pointers to the P5 and P7 PNF structures, allowing to configure which function to use to pack/unpack the messages, as well as unpack the message header, being then used seamlessly regardless of using the FAPI or nFAPI functions.
Changes the header unpack and message unpack functions to return true on success and false on failure, instead of an int
This change is done in preparation to add the header unpack functions to the VNF and PNF structures as function pointers, used to peek the message headers prior to processing.
Add a faux fapi_nr_p7_message_header_unpack with the same signature as nfapi_nr_p7_message_header_unpack, to be used for the P7 header unpack function pointer.
E release had the same issue of not using pkgconfig properly as F release.
This issue was fixed in F release when enabling its compatibility with DPDK 21+.
This commit brings this fix to E release.
In order to be usable in parallel of FHI 7.2, BBDEV devices should be included in the EAL initialization that is prformed by xran.
This commit adds a way of adding the BBDEV device from OAI.
Also fixes an issue with pkgconfig in xran.
Get xran stats in the trx_oran_get_stats function
and use trx_oran_get_stats upon stopping and ending RF.
Co-authored-by: Romain Beurdouche <romain.beurdouche@eurecom.fr>
Look up xran_fh_init/xran_fh_config through driver instead of peaking
into xran internals. Note that xran writes values back into these
structs during initialization, and hence it is important to store them
_after initialization_.
Some remarks regarding less obvious changes:
- slotnum is replaced by slots_in_sf: SLOTNUM_PER_SUBFRAME uses the time
duration of a slot (=interval_us_local) to calculate the numbers of
slots in a subframe, which can be done with a simple shift instead
- The prach duration should be queried from the PRACH configuration
table. The function to query the occasion info is part of the MAC
layer code while this information can be used outside of this layer.
Use header `nr_prach_config.h` to not duplicate functionality.
Co-authored-by: Romain Beurdouche <romain.beurdouche@eurecom.fr>
Split out type and function definitions for a cleaner separation for
some consumers of these functions. Concretely, nr_mac_common.h includes
various ASN.1 NR RRC headers, but not all consumers of these APIs might
need these headers. For instance, the next commit will use these
functions in the driver for 7.2 (it needs to compute PRACH length), but
the driver itself does not depend on nor does it need the ASN.1 NR RRC
headers. Defining a new header avoids the problem.
The buffers are set up by the OAI xran driver, so instead of peaking
into xran internal data, access the buffers through the driver directly.
The buffers get set up through the following xran calls
In xran_5g_fronthault_config():
- src => sFrontHaulTxBbuIoBufCtrl
- srccp => sFrontHaulTxPrbMapBbuIoBufCtrl
- dst => sFrontHaulRxBbuIoBufCtrl
- dstcp => sFrontHaulRxPrbMapBbuIoBufCtrl
In xran_5g_prach_req()
- prach(dst) => sFHPrachRxBbuIoBufCtrl
- prach(dst)decomp => sFHPrachRxBbuIoBufCtrlDecomp
Note that in all cases:
- the xran buffer array is [XRAN_N_FE_BUF_LEN][XRAN_MAX_SECTOR_NR][XRAN_MAX_ANTENNA_NR]
(of [internal] type BbuIoBufCtrlStruct, but we give an sBufferList)
- the driver buffer array is [XRAN_MAX_ANTENNA_NR][XRAN_N_FE_BUF_LEN]
Hence, we switch the order of indexing, leave out the sector, and omit
the sBufferList member.
xran_get_slot_idx_from_tti() has been introduced to access data
information from xran. However, it makes no sense, as the used macros to
calculate frame, slot, subframe, are already in the public API. Hence,
use these macros directly.
It would be possible to remove xran_get_slot_idx_from_tti(), but doing
so we would need to update the patch ID, causing trouble to users.
This was a problem with open5gs and more than one PDU session.
The core network sets UE AMBR only once, leading to failure in the gNB
for the second PDU session.
(A proper handling of AMBR has to be develop at some point in the gNB.)
E1 is the interface that lies between the nodes CU Control Plane (CUCP) and CU User Plane (CUUP). Once the nodes are configured, all user plane traffic flows through CUUP.
@@ -77,11 +77,11 @@ sequenceDiagram
```
More details about the E1AP procedures in OAI are available in this document: [E1 Procedures](./e1ap_procedures.md).
## 2. Running the E1 Split
# 2. Running the E1 Split
The setup is assuming that all modules are running on the same machine. The user can refer to the [F1 design document](./../F1AP/F1-design.md) for local deployment of the DU.
### 2.1 Configuration File
## 2.1 Configuration File
The gNB is started based on the node type that is specified in the configuration file. The following parameters must be configured accordingly.
@@ -130,9 +130,9 @@ The CUUP uses the IP address specified in `gNBs.[0].local_s_address` for F1-U an
Alternatively, you can use the config files `ci-scripts/conf_files/gnb-cucp.sa.f1.conf` and `ci-scripts/conf_files/gnb-cuup.sa.f1.conf`.
### 2.2 Steps to Run the Split in rfsimulator with OAI UE
## 2.2 Steps to Run the Split in rfsimulator with OAI UE
Note: A 5G core must be running at this point. Steps to start the OAI 5G core can be found [in the oai-cn5g-fed repository](https://gitlab.eurecom.fr/oai/cn5g/oai-cn5g-fed/-/blob/master/docs/DEPLOY_HOME.md) or [here](../NR_SA_Tutorial_OAI_CN5G.md).
Note: A 5G core must be running at this point. Steps to start the OAI 5G core can be found [in the oai-cn5g-fed repository](https://gitlab.eurecom.fr/oai/cn5g/oai-cn5g-fed/-/blob/master/docs/DEPLOY_HOME.md) or [here](NR_SA_CN5G_gNB_USRP_COTS_UE_Tutorial.md).
0. Open wireshark to capture the E1AP messages. You might set the capture filter
to `sctp` to limit the number of captured packages.
## 3. Configuration file IP addresses of network functions
# 3. Configuration file IP addresses of network functions
You can also run the nodes on different machines. If you do so please change the interface parameters accordingly and make sure the interfaces are reachable. Please refer to the following figure for an overview of all parameters.
@@ -173,7 +173,7 @@ You can also run the nodes on different machines. If you do so please change the
[PDF version](./images/e1-archi.pdf) | [LaTeX/TikZ version](./images/e1-archi.tex) if you want to modify to reflect your setup
## 4. Multiple CU-UP
# 4. Multiple CU-UP
It is possible to connect multiple CU-UP to the same CU-CP. In the handler of
the E1 Setup Request, the CU-CP verifies that the PLMN(s) (MCC, MNC) between
@@ -195,6 +195,6 @@ that you have to restart the CU-CP if you want to connect the CU-UP again
(e.g., after a crash). The CU-CP might also misfunction during attach if a
CU-UP was connected, but disconnected in the meantime.
## 5. Abnormal conditions
# 5. Abnormal conditions
* The CU-UP goes offline during normal operation (e.g. UEs have a valid PDU Session and are exchanging data on the UP): after restarting the CU-UP, the UP is not restored and the user will notice GTP errors. In this case the UEs have to reconnect.
These files are tested in the CI, and are configured for use in docker,
see [this `docker-compose` file](../../ci-scripts/yaml_files/5g_f1_rfsimulator/docker-compose.yaml).
see [this `docker-compose` file](../ci-scripts/yaml_files/5g_f1_rfsimulator/docker-compose.yaml).
The rules to decide if a config triggers a start of a DU, CU, or monolithic
gNB, are, in order:
@@ -200,7 +200,7 @@ gNB, are, in order:
(`tr_s_preference`), it is a CU.
3. It is a (monolithic) gNB.
### F1 IP configuration for Local network deployment of F1
## F1 IP configuration for Local network deployment of F1
The following paragraphs explain the IP configuration for F1 in the OAI config
files on the example of a a local deployment. We assume that the CU will bind
@@ -242,7 +242,7 @@ the options `MACRLCs.[0].local_n_address` and
`MACRLCs.[0].local_n_address_f1u`, respectively. Note that this is not foreseen
for the CU; in the case of the CU, please use separate CU-UP and CU-CP.
### Configuration of multiple DUs
## Configuration of multiple DUs
Upon F1 Setup Request of a new DU, the CU cross-checks that
@@ -260,9 +260,9 @@ You have to of course make sure that the local interface of the DU
Assuming you use RFsim, you should make the RFsimulator server side (typically
the gNB) bind on different hosts (`rfsimulator.serverport`).
## Code documentation
# Code documentation
### Common multi-threading architecture
## Common multi-threading architecture
The CU and DU interfaces are based on ITTI threads (see `common/utils/ocp_itti/itti.md`)
adopted by all OAI upper layers to run isolated threads dedicated to one feature.
@@ -301,7 +301,7 @@ All GTP-U tunnels are managed in a Linux Thread, that have partially ITTI design
3. incoming packets are sent to the tunnel creator using a C callback (the callback function is given in tunnel creation order). The callback should not block
### F1-C messages towards the CU
## F1-C messages towards the CU
The CU thread starts when the CU starts. It opens listening socket on the
configuration-specified IP/port by sending the appropriate message to
@@ -332,7 +332,7 @@ You might also want to consult TS 38.401 regarding the message exchange.
@@ -12,7 +12,7 @@ The RRC layer controls the basic connection setup of UEs as well as additional
procedures. It is the fundamental building block of OAI's CU-CP, and interacts
with lower layers (DU, basically MAC and RLC) through F1AP messages, and with
the CU-UP through E1AP messages. More information can be found in the
respective [F1AP page](../F1AP/F1-design.md) and [E1AP page](../E1AP/E1-design.md).
respective [F1AP page](../F1-design.md) and [E1AP page](../E1AP/E1-design.md).
# Periodic output and interpretation
@@ -57,7 +57,7 @@ As of now, it does not print information about connected CU-UPs or AMFs.
## Split-related options (when running in a CU or CU-CP)
See [F1 documentation](../F1AP/F1-design.md) for information about the F1 split.
See [F1 documentation](../F1-design.md) for information about the F1 split.
See [E1 documentation](../E1AP/E1-design.md) for information about the E1 split.
## RRC-specific configuration options
@@ -99,43 +99,26 @@ the [MAC configuration](../MAC/mac-usage.md) as well for SIB configuration.
### Neighbor-gNB configuration
Refer to the [handover tutorial](../handover-tutorial.md) for detailed information about gNB neighbors and handover procedures.
#### What is a gNB neighbor?
Network continuity is a key aspect of 5G. In the 5G architecture, gNB neighbors play a central role in maintaining service continuity through mechanisms such as handover and load balancing. By definition, a gNB neighbor is another gNB that can be measured and linked by the UE. If the current serving gNB is no longer optimal, the UE may connect to a neighbor gNB.
To support this behavior, the network configuration specifies additional frequencies and cells that the UE should measure. The UE reports these measurements to the network, which then decides whether or not to initiate a handover.
Neighbor types include:
- **Intra-gNB neighbors** - cells belonging to the same gNB
- **Inter-gNB neighbors** - cells belonging to different gNBs
- **Inter-RAT neighbors** - cells belonging to another RAT (e.g., LTE)
#### Required configuration parameters
To define a neighbor cell in the configuration file, the following parameters are required:
To define a neighbor cell in the configuration file, the following parameters are typically needed:
- **gNB ID** - unique identifier of the gNB
- **Cell ID** - identifier of the cell within the gNB
- **Physical Cell ID** - identifier of the cell’s synchronization signal (PCI)
- **Absolute Frequency** - frequency used by the SSB (absoluteFrequencySSB)
@@ -37,32 +37,32 @@ Our code might not work with all 5G phones yet, but we are constantly improving
* Simcom SIMCOM8200EA
* Quectel RM500Q-GL
Note1: In the version we have at Eurecom, you need to set the PLMN to 50501, and you also need to change the firmware to "11.0.0 (RD1A.201105.003.B1, Nov 2020, EU carriers)" (see [Factory Images for Nexus and Pixel Devices](https://developers.google.com/android/images))
Note1: In the version we have at Eurecom, you need to set the PLMN to 50501, and you also need to change the firmware to "11.0.0 (RD1A.201105.003.B1, Nov 2020, EU carriers)" (see https://developers.google.com/android/images)
See [Building UE, eNB and gNb executables](https://gitlab.eurecom.fr/oai/openairinterface5g/blob/develop/doc/BUILD.md#building-ues-enodeb-and-gnodeb-executables)
See https://gitlab.eurecom.fr/oai/openairinterface5g/blob/develop/doc/BUILD.md#building-ues-enodeb-and-gnodeb-executables
- **eNB**
```bash
```
cd <your oai installation directory>/openairinterface5g/
source oaienv
cd cmake_targets/
@@ -72,7 +72,7 @@ cd cmake_targets/
- **gNB**
```bash
```
cd <your oai installation directory>/openairinterface5g/
These files have to be updated manually to set the IP addresses and frequency.
---
>**⚠️ ATTENTION ⚠️**
>
>An **EXTERNAL** clock is used to sync the eNB and gNB, whether the clock is internal or external is defined in the configuration files (!! details needed !!)
>
---
**ATTENTION** : an **EXTERNAL** clock is used to sync the eNB and gNB,
whether the clock is internal or external is defined in the configuration files (!! details needed !!)
1- In the **eNB configuration file** :
- look for MME IP address, and update the **ipv4 field** with the IP address of the **EPC** server
@@ -199,13 +198,14 @@ The test takes typically a few seconds, max 10-15 seconds. If it takes more than
UpLink MIMO refers to the use of multiple antennas at both the UE (User Equipment) as transmitter and the base station as receiver. They are used to send multiple data streams simultaneously from the user to the network.
## How to use it ?
## Step 1: build phy sim
```bash
cd cmake_targets/
sudo ./build_oai --phy_simulators -c
cd phy_simulators/build/
```
## Step 2: Use the sim
### Option 1: launch ULSCH sim
On UpLink Shared CHannel(ULSCH), multiple users share the same radio resources (time and frequency slots), the base station schedules and assigns the resources dynamically. The goal here is to simulate the sending of data from an UE to a base station.
On UpLink Channel, a single user is dealing with a single base station. The goal is here to simulate the sending of the data from an UE to a base station.
It's focusing on:
- UpLink chain validation
- PUSCH (whole chain) on UE side and gNB side
- No channel model on data domain signal, which means an ideal scenario is used
- No cross-path connection, which means no signal leakage or interference are present
- PMI = 0 is only unitary precoding matrix
The same parameters are used.
```bash
sudo ./nr_ulsim -n100 -m9 -r106 -s13 -W4 -y4 -z4
```
### Option 3: Use RFSIM
#### Build
RF simulator allows to test OAI without an RF board. It replaces an actual RF board driver.
```bash
sudo ./build_oai -c --gNB --nrUE -w SIMU
```
#### Run
##### 4x4 RANK 4
Example:
| Parameter | Value | Description |
|--- |:-: |--: |
| O | [...] | Use a configuration file |
| l | 2 | Set the number of layers for downlink to 2 for PHY test mode |
| L | 4 | Set the number of layers for uplink to 4 for PHY test mode |
| ue-nb-ant-rx | 4 | Set UE number of rx antennas to 4 |
| ue-nb-ant-tx | 4 | Set UE number of tx antennas to 4 |
OAI uses/supports a number of environment variables, documented in the following:
-`NFAPI_TRACE_LEVEL`: set the nfapi custom logging framework's log level; can be one of `error`, `warn`, `note`, `info`, `debug`. Default is `warn`.
-`NR_AWGN_RESULTS_DIR`: directory containing BLER curves for NR L2simulator channel modelling in SISO case
-`NR_MIMO2x2_AWGN_RESULTS_DIR`: directory containing BLER curves for NR L2simulator channel modelling in 2x2 MIMO case
-`OPENAIR_DIR`: should point to the root directory of OpenAirInterface; BLER curves for LTE L2sim channel emulation
-`NR_AWGN_RESULTS_DIR`: directory containing BLER curves for L2simulator channel modelling in SISO case
-`NR_MIMO2x2_AWGN_RESULTS_DIR`: directory containing BLER curves for L2simulator channel modelling in 2x2 MIMO case
-`NVRAM_DIR`: directory to read/write NVRAM data in (5G) `nvram` tool; if not defined, will use `PWD` (working directory)
-`OAI_CONFIGMODULE`: can be used to pass the configuration file instead of `-O`
-`OAI_GDBSTACKS`: if defined when hitting an assertion (`DevAssert()`, `AssertFatal()`, ...), OAI will load `gdb` and provide a backtrace for every thread
-`OAI_RNGSEED`: overwrites any seed for random number generators (RNG) in simulators
-`OAI_THREADPOOLMEASUREMENTS`: path to a file to store thread pool debugging information, see the [thread pool documentation](..common/utils/threadPool/thread-pool.md)
-`OPENAIR_DIR`: should point to the root directory of OpenAirInterface; some code relies on this to get a filename, e.g., BLER curves for L2sim channel emulation
-`USIM_DIR`: directory to read/write USIM data in (4G) `usim` tool; if not defined, will use `PWD` (working directory)
Furthermore, these variables appear in code that is not maintained and maybe not even compiled anywhere:
@@ -18,5 +19,3 @@ Furthermore, these variables appear in code that is not maintained and maybe not
-`SSH_CLIENT`: alternative host to connect to, for CLI, if `REMADDR` is not defined
-`USER`: user name in the command-line interface
-`rftestInputFile`: input file for the `calibration_test` tool
This tutorial explains how to perform handovers. It covers both F1 handovers
(intra-gNB, within a single gNB between DUs) and N2 handovers (inter-gNB).
This tutorial explains how to perform handovers. For the moment, only F1
handovers are supported.
[[_TOC_]]
@@ -13,23 +13,6 @@ same.
# What is a gNB neighbor?
Network continuity is a key aspect of 5G. In the 5G architecture, gNB neighbors
play a central role in maintaining service continuity through mechanisms such
as handover and load balancing. By definition, a gNB neighbor is another gNB
that can be measured and linked by the UE. If the current serving gNB is no
longer optimal, the UE may connect to a neighbor gNB.
To support this behavior, the network configuration specifies additional frequencies
and cells that the UE should measure. The UE reports these measurements to the
network, which then decides whether or not to initiate a handover.
Neighbor types include:
- **Intra-gNB neighbors** - cells belonging to the same gNB
- **Inter-gNB neighbors** - cells belonging to different gNBs
- **Inter-RAT neighbors** - cells belonging to another RAT (e.g., LTE)
# Steps to run F1 handover with OAI UE
Measurement reporting and processing of RRC Reconfiguration for Mobility are
@@ -370,16 +353,10 @@ We assume:
* Two independent gNBs connected to the same 5GC via N2 interface.
* A UE initially connected to gNB-PCI0, which will be handed over to gNB-PCI1.
* Handover is triggered by either a decision based measurement event (e.g. A3) or telnet command.
* Handover is triggered by either by decision based measurement event (e.g. A3) or telnet command.
## Steps to run N2 handover with OAI UE
**Note for same-machine setup:** When running both gNBs on the same machine, you need to assign a unique IP address to the second gNB to avoid network conflicts. For example:
```sh
sudo ip addr add 192.168.71.180/24 dev rfsim5g-public
```
1. Similarly to F1 handover, UE does not support any measurement reporting and handover is triggered by
telnet command. Therefore, ensure that both gNBs and UE are built with telnet support:
**Note for same-machine setup:** When running both gNBs on the same machine, add the following network interface options to the target gNB command, e.g.:
@@ -15,7 +15,7 @@ The UE exits when at any point in operation it gets out of synchronization. When
UE uses actors which are threads dedicated to particular activity. Sync Actor handles initial sync. DL Actors handle DLSCH PHY procedures. UL procedures are are run on the UL Actor
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