This commit introduces the CUDA implementation of the multipath channel
model in `multipath_channel.cu`.
- Implements `multipath_channel_kernel` using shared memory for
efficient, high-performance convolution.
- Provides a C-callable wrapper, `multipath_channel_cuda`, to
orchestrate the full pipeline of data transfers and kernel
launches.
- The wrapper includes support for multiple memory models (Explicit
Copy, Unified Memory, ATS) via preprocessor directives to adapt to
different build configurations.
- Adds a `interleave_channel_output_cuda` utility to convert signal
data from the CPU's planar format to the GPU's interleaved format.
This commit adds the initial infrastructure for building accelerated simulation components.
- Adds the CUDA_ENABLE option and logic to find the CUDA toolkit.
- Adds the CHANNEL_SSE option to enable SSE-specific code paths.
- Sets required properties on the SIMU target to allow linking with CUDA-compiled objects.
- Creates the initial oai_cuda.h header for the public API.
This commit introduces a new library module (rrc_cell_management.c/h)
to centralise functions that provides cell lookup, DU-specific cell
management, and cell lifecycle managements.
The design uses a dual-tree architecture:
- Global cell tree: RB-tree at RRC level (rrc->cells) keyed by cell_id,
used for O(log N_CELL) lookups and for maintaining num_cells.
- DU-specific storage: seq_arr_t per DU (du->cells) for iteration and
management of cells belonging to each DU.
API added:
- Global tree: get_cell_by_cell_id()(finds cell using global RB-tree
lookup (O(log N_CELL) complexity); rrc_add_cell(); rrc_rm_cell()
(rrc_rm_cell removes from tree, decrements num_cells, and frees the
cell via rrc_free_cell_container).
- DU-local seq_arr: rrc_get_cell_for_du(), rrc_get_cell_by_pci_for_du(),
rrc_add_cell_to_du() (with duplicate cell_id/PCI checks).
- Cleanup: rrc_free_cell_container() (frees ASN.1 MIB/SIB1/MTC and
container
Build: add rrc_cell_management static library in openair2/RRC/NR;
link it into nr_rrc from top-level CMakeLists.txt.
NR UE: add support for multiple RF frontends
This MR adds basic support for multiple RF-frontends at the UE.
There are multiple reasons why we might want this:
1. There might be different antennas needed for different bands (e.g. NTN or
TN antennas). These antennas might be connected to different RF-frontends.
In case of Handover, the UE needs to dynamically switch between these
RF-frontends.
2. Each rf-simulator connection carries baseband I/Q samples. To be able to
perform a handover between two cells at different frequencies, there must
be two rf-simulator connections, as the baseband channels should not
interfere and thus cannot simply be added.
3. When we want to support multiple UE simulation within one instance of
nr-uesoftmodem, and allow multiple cells and probably even handover between
these cells, we need either:
1. dedicated RF-frontends for each simulated UE, or
2. dedicated RF-frontends for each connected cell and dynamically assign
simulated UEs accordingly.
This MR implements what is needed for 1., 2. and 3.1.
Create Debian and Redhat packages with CPack
Use CPack in CMakelists in order to create packages, creation command is
available in build_oai script and options description is available in
packages.md
Packages must have a name, a version, a section, an architecture, a maintainer, a description (long and summary), dependencies
Shared libraries must be stripped, have soversion, version (debug symbols are found in separate packages), since MODULE is used instead of SHARED it works as a plugin library which is opened using dlopen-like functionality, see: https://cmake.org/cmake/help/latest/command/add_library.html
Packages must have postin and postun scripts
Since it is not recommended to modify CMAKE_EXE_LINKER_FLAGS, cmake's path variables are used : https://discourse.cmake.org/t/how-do-i-replace-the-compiler-options-for-one-target/7815/5
RHEL uses a dedicated cblas include directory. Correctly include this
for the one target PHY_UE that relies on this.
Co-authored-by: Robert Schmidt <robert.schmidt@openairinterface.org>
E2SM-RC RRC message forwarding (e.g., to signal a new UE, measurement
reports, ...) was broken since commit d6c29b2d2c, as we accidentally
removed the E2_AGENT compilation definition from RRC layer.
Although this commit fixes the mentioned issue, it also causes undefined
references to functions defined in ran_func_rc.c file. Therefore, we
add a hack that provides the definition, and abort if we ever hit these
functions, which in theory should not happen.
Future cleanup should avoid linking in RRC and other layers into
simulators.
Fixes: d6c29b2d2c ("Fix E2_AGENT linking w.r.t. simulators ")
Make all targets compile
This MR enables us to compile all targets, and does that in one CI test. This
closes#726. Now, this should work:
cd ~/openairinterface5g
mkdir build && cd build
cmake .. -GNinja && ninja
To achieve this, I did the following:
- some targets have been fixed (warnings, errors)
- some targets have been removed when they did not seem to serve a good purpose
(e.g., an almost empty test)
- some targets have been commented (e.g., LTE simulators, some unitary tests)
which we maybe want to revive in the future
- some targets built when just building with ninja, but not all. For instance,
telnetsrv_enb would typically build, but it was missing a dependency. Doing
cmake .. -GNinja && ninja telnetsrv_enb would show this (in develop)
To help with the last bullet point, there is a script compile_targets.sh that
can compile targets independently (and in parallel, to not wait for ages) to
show that targets compile properly compile-targets.patch.
In almost all cases, the problem is that a specific module uses the logging
module, which depends on T, which needs to dynamically create headers. The way
to do this is to have a dependency, and many targets use generate_T or {T_LIB}
({} intentional: T might be absent, so then it evaluates to nothing). However,
not all do this, and those that depend on T actually don't depend on T, but on
the logging module, which in turn depends on T. So in many places, a simple
dependency onto log_headers fixes this problem, and generate_T or {T_LIB}
simplifies the dependency (but not always). The commits should have more info.
Note that at least the targets in FlexRIC do not all compile, at least in the
configuration that we use in docker/Dockerfile.build.ubuntu. So for the latter,
we cannot build with a simple ninja, but FlexRIC seems to be the only one that
does not compile. Since FlexRIC is a separate repository, that needs to be
addressed in the corresponding repository.
These libraries have an (indirect) dependency on T, either by using the
logging module (which in turn depends on T), or through other includes.
The easiest is to depend on the logging module, which will fulfil also
the T dependency.
It would equally be feasible to use the utils target (which in turn
depends on log_headers), but this would necessitate to compile, and does
not seem to be necessary.
This constant seems to be an analogon to NUMBER_OF_UE_MAX; replace with
the latter, as it does the same. (NBIoT does not work, anyway)
Fix dependencies of the NB_IoT target so it compiles.
Remove, because
1) it does not compile (the asn1c generated code should be prepend with
LTE_ etc, nobody did that)
2) a shared module makes no sense
3) the configuration is trivial to recreate
Link E2_AGENT libraries directly into nr-softmodem/lte-softmodem instead
of L2/L2_NR/F1AP. Doing that ensures that simulators, e.g.,
nr_dlsim/nr_ulsim do still compile. It also simplifies the code.
Prior to this, compiling nr_ulsim with E2_AGENT, for instance, resulted
in the following errors, fixed in this commit:
FAILED: nr_ulsim
/usr/bin/ld: openair2/E2AP/RAN_FUNCTION/libe2_ran_func_du_cucp_cuup.a(ran_func_rc.c.o): in function `send_aper_ric_ind':
/home/oai/robert/cleanup-t-dependency-cmake/openair2/E2AP/RAN_FUNCTION/O-RAN/ran_func_rc.c:643: (.text+0xee6): undefined reference to `async_event_agent_api'
/usr/bin/ld: /home/oai/robert/cleanup-t-dependency-cmake/openair2/E2AP/RAN_FUNCTION/O-RAN/ran_func_rc.c:643:(.text+0x11ca): undefined reference to `async_event_agent_api'
/usr/bin/ld: /home/oai/robert/cleanup-t-dependency-cmake/openair2/E2AP/RAN_FUNCTION/O-RAN/ran_func_rc.c:643:(.text+0x1485): undefined reference to `async_event_agent_api'
/usr/bin/ld: /home/oai/robert/cleanup-t-dependency-cmake/openair2/E2AP/RAN_FUNCTION/O-RAN/ran_func_rc.c:643:(.text+0x159c): undefined reference to `async_event_agent_api'
/usr/bin/ld: /home/oai/robert/cleanup-t-dependency-cmake/openair2/E2AP/RAN_FUNCTION/O-RAN/ran_func_rc.c:643:(.text+0x16b1): undefined reference to `async_event_agent_api'
[...]
Improvements to RRC PDU session and DRB handling logic
This merge request introduces a major simplification and cleanup of the gNB RRC
PDU Sessions and DRBs handling logic. The core goals of this work are to:
- Replace fixed-size PDU Session, DRBs and QoS arrays with dynamic containers
- Simplify and modularize helper functions for session/DRB management
- Prepare for further refactoring of the PDU Session state machine
- Improve code safety and maintainability through better bounds checking
- Limit scope of get_default_rbconfig function: from asn1_msg.c/.h to rrc_gNB_nsa.c where it's used
- Create new rrc_gNB_asn1.c/h files for ASN.1 utility functions: they can be used in other RRC files
- Add nr_rrc_build_pdcp_config_ie function for building PDCP configuration IEs
- Update get_default_rbconfig to use the new PDCP config builder
- Add rrc_gNB_asn1.c to CMakeLists.txt build configuration
The RRC PDU Session struct is converted from a fixed-size array
to a dynamically sized seq_arr. This improves flexibility and
simplifies session management by eliminating arbitrary size limits
and enabling dynamic addition/removal of PDU sessions.
Helper functions and loops have been adapted to use the seq_arr API.
This change is a step toward more robust and maintainable handling
of PDU sessions in the gNB RRC layer.
The "status" state machine remains untouched in this commit and
is refactored in a later commit.
Also:
* add macro to push to seq_arr and return the new element
* move initialization of xid (RRC PDU Session struct) to
find_pduSession (temporary, will be finalized in a later
commit) since with the new seq_arr design the initialization
is no longer possible in the UE context generation (also
does not belong to it, initialize when adding a new PDU Session)
Code cleanup (SRS, config files and more)
- Remove deprecated elements from some configuration files (also closes#997)
- Improve SRS code with a better separation between common code and gNB/UE code
- Other minor compilation improvements
This commit introduces the NG Mobility Management Procedure known as
Handover Preparation. The outbound message is sent by the source NG-RAN
and is known as Handover Required.
* introduce NGAP library for Mobility Management
* introduce NGAP IEs encoder functions for Handover Required and relevant common IEs
* handle RRC trigger in NGAP and Send NGAP Handover Required to the AMF
Co-authored-by: batuhan duyuler <batuhan.duyuler@firecell.io>
Align add_boolean_option as per CMake documentation use only ON/OFF for uniformity
The add_boolean_option of CMake is not uniform everywhere. We were using
either True/False or ON/OFF. It is better to be uniform to avoid
confusion.
As an example, see here CMake documentation for an example:
https://cmake.org/cmake/help/latest/module/CMakeDependentOption.html#example-basic-usage
There are also some minor spelling corrections.
some work for better interoperability with srsRAN DU
Just add the minimum to get some user plane traffic going on.
When doing user plane traffic, in the CU logs we have a lot of:
[GTPU] NR-RAN container type: 1 not supported
That will be fixed in another MR, not here.
Add a CU-UP load tester and improve GTP performance
This adds a simple tester program for the CU-UP. It sets up a number of
UEs/bearers in the CU-UP via the E1 interface, then streams data in
downlink/uplink (as seen by the CU-UP). More information is available in
tests/nr-cuup/README.md.
Includes some fixes to properly verify that SCTP is installed, and use
"the right cmake way" to use it in cmake code (see commit for details).
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)
remove specific directory for LTE SIM management tools
This is very old code has never been integrated with the "main" OAI
cmake infrastructure and more recent libraries.
This MR integrates the three binaries for LTE virtual sim management in
the regular build process and log system
Eric Mittag