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oai EPC is developed in a distinct project with it's own [documentation](https://github.com/OPENAIRINTERFACE/openair-cn/wiki) , it is not described here.
oai EPC is developed in a distinct project with it's own [documentation](https://github.com/OPENAIRINTERFACE/openair-cn/wiki) , it is not described here.
OAI UE and eNodeB sources can be downloaded from the Eurecom [gitlab repository](./GET_SOURCES.md).
OAI softmodem sources, which aim to implement 3GPP compliant UEs, eNodeB and gNodeB can be downloaded from the Eurecom [gitlab repository](./GET_SOURCES.md).
Sources come with a build script [build_oai](../cmake_targets/build_oai) located at the root of the `openairinterface5g/cmake_targets` directory. This script is developed to build the oai binaries (executables,shared libraries) for different hardware platforms, and use cases.
Sources come with a build script [build_oai](../cmake_targets/build_oai) located at the root of the `openairinterface5g/cmake_targets` directory. This script is developed to build the oai binaries (executables,shared libraries) for different hardware platforms, and use cases.
The main oai binaries, which are tested by the Continuous Integration process are:
The main oai binaries, which are tested by the Continuous Integration process are:
- The LTE UE: `lte-uesoftmodem`
- The LTE UE: `lte-uesoftmodem`
- The 5G UE: `nr-uesoftmodem`
- The LTE eNodeB: `lte-softmodem`
- The LTE eNodeB: `lte-softmodem`
- The PHY simulators: `dlsim` and `ulsim`
- The 5G gNodeB: `nr-softmodem`
- The LTE PHY simulators: `dlsim` and `ulsim`
- The 5G PHY simulators: `nr_dlschsim``nr_dlsim``nr_pbchsim``nr_pucchsim``nr_ulschsim``nr_ulsim``polartest``smallblocktest`
`ulsim``ldpctest`
Running the [build_oai](../cmake_targets/build_oai) script also generates some utilities required to build and/or run the oai softmodem binaries:
-`con2uedata`: a binary used to build the UE data from a configuration file. The created file emulates the sim card of a 3GPP compliant phone.
-`nvram`: a binary used to build UE (IMEI...) and EMM (IMSI, registered PLMN) non volatile data.
-`rb_tool`: radio bearer utility
-`genids` T Tracer utility, used at build time to generate T_IDs.h include file. This binary is located in the [T Tracer source file directory](../common/utils/T) .
The build system for OAI uses [cmake](https://cmake.org/) which is a tool to generate makefiles. The `build_oai` script is a wrapper using cmake, make and standard linux shell commands to ease the oai build and use . The file describing how to build the executables from source files is the [CMakeLists.txt](../cmake_targets/CMakeLists.txt), it is used as input by cmake to generate the makefiles.
The build system for OAI uses [cmake](https://cmake.org/) which is a tool to generate makefiles. The `build_oai` script is a wrapper using cmake, make and standard linux shell commands to ease the oai build and use . The file describing how to build the executables from source files is the [CMakeLists.txt](../cmake_targets/CMakeLists.txt), it is used as input by cmake to generate the makefiles.
The oai softmodem supports many use cases, and new ones are regularly added. Most of them are accessible using the configuration file or the command line options and continuous effort is done to avoid introducing build options as it makes tests and usage more complicated than run-time options. The following functionalities, originally requiring a specific build are now accessible by configuration or command line options:
The oai softmodem supports many use cases, and new ones are regularly added. Most of them are accessible using the configuration file or the command line options and continuous effort is done to avoid introducing build options as it makes tests and usage more complicated than run-time options. The following functionalities, originally requiring a specific build are now accessible by configuration or command line options:
- s1, noS1
- s1, noS1
- all simulators, with exception of PHY simulators, which are distinct executables.
- all simulators as the rfsimulator, the L2 simulator, with exception of PHY simulators, which are distinct executables.
Calling the `build_oai` script with the -h option gives the list of all available options, but a process to simplify and check the requirements of all these options is on-going. Check the [table](BUILD.md"# `build_oai` options") At the end of this page to know the status of `buid_oai` options which are not described hereafter.
Calling the `build_oai` script with the -h option gives the list of all available options, but a process to simplify and check the requirements of all these options is on-going. Check the [table](BUILD.md"# `build_oai` options") At the end of this page to know the status of `buid_oai` options which are not described hereafter.
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Detailed information about these simulators can be found [in this dedicated page](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/OpenAirLTEPhySimul)
Detailed information about these simulators can be found [in this dedicated page](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/OpenAirLTEPhySimul)
# Building UE and eNodeB Executables
# Building UEs, eNodeB and gNodeB Executables
After downloading the source files, a single build command can be used to get the binaries supporting all the oai softmodem use cases (UE and eNodeB):
After downloading the source files, a single build command can be used to get the binaries supporting all the oai softmodem use cases (UE and [eg]NodeB):
```
```
cd <your oai installation directory>/openairinterface5g/
cd <your oai installation directory>/openairinterface5g/
source oaienv
source oaienv
cd cmake_targets/
cd cmake_targets/
./build_oai -I -w USRP --eNB --UE
./build_oai -I -w USRP --eNB --UE --nrUE --gNB
```
```
- The `-I` option is to install pre-requisites, you only need it the first time you build the softmodem or when some oai dependencies have changed.
- The `-I` option is to install pre-requisites, you only need it the first time you build the softmodem or when some oai dependencies have changed.
- The `-w` option is to select the radio head support you want to include in your build. Radio head support is provided via a shared library, which is called the "oai device" The build script creates a soft link from `liboai_device.so` to the true device which will be used at run-time (here the USRP one,`liboai_usrpdevif.so` . USRP is the only hardware tested today in the Continuous Integration process. The RF simulator[RF simulator](../targets/ARCH/rfsimulator/README.md) is implemented as a specific device replacing RF hardware, it can be build using `-w SIMU` option.
- The `-w` option is to select the radio head support you want to include in your build. Radio head support is provided via a shared library, which is called the "oai device" The build script creates a soft link from `liboai_device.so` to the true device which will be used at run-time (here the USRP one,`liboai_usrpdevif.so` . USRP is the only hardware tested today in the Continuous Integration process. The RF simulator[RF simulator](../targets/ARCH/rfsimulator/README.md) is implemented as a specific device replacing RF hardware, it can be specifically built using `-w SIMU` option, but is also built during any softmodem build.
-`--eNB` is to build the `lte-softmodem` executable and all required shared libraries
-`--eNB` is to build the `lte-softmodem` executable and all required shared libraries
-`--gNB` is to build the `nr-softmodem` executable and all required shared libraries
-`--UE` is to build the `lte-uesoftmodem` executable and all required shared libraries
-`--UE` is to build the `lte-uesoftmodem` executable and all required shared libraries
-`--nrUE` is to build the `nr-uesoftmodem` executable and all required shared libraries
You can build the eNodeB and the UE separately, you may not need both of them depending on your oai usage.
You can build any oai softmodem executable separately, you may not need all of them depending on your oai usage.
After completing the build, the binaries are available in the `cmake_targets/ran_build/build` directory. A copy is also available in the `target/bin` directory, with all binaries suffixed by the 3GPP release number, today .Rel14 by default. It must be noticed that the option for building for a specific 3GPP release number is not tested by the CI and may be removed in the future.
After completing the build, the binaries are available in the `cmake_targets/ran_build/build` directory. A copy is also available in the `target/bin` directory, with all binaries suffixed by the 3GPP release number, today .Rel15.
If your kernel is generic, install `kernel-devel` package: `sudo yum install kernel-devel`
In most case, your kernel is real-time. Install `kernel-rt-devel` package: `sudo yum install kernel-rt-devel`
# Building Optional Binaries
# Building Optional Binaries
## Telnet Server
## Telnet Server
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You can get documentation about the telnet server [here](common/utils/telnetsrv/DOC/telnetsrv.md)
You can get documentation about the telnet server [here](common/utils/telnetsrv/DOC/telnetsrv.md)
## USRP record player
The USRP record player today needs a specific build. Work to make it available as a run time option is under consideration
## Other optional libraries
## Other optional libraries
Using the help option of the build script you can get the list of available optional libraries. Those which haven't been mentioned above are known to need more tests and documentation
Using the help option of the build script you can get the list of available optional libraries. Those which haven't been mentioned above are known to need more tests and documentation.
`./build_oai --build-lib all` will build all available optional libraries.
# `build_oai` options
# `build_oai` options
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| -c | maintained | erase all previously built files for this target before starting the new build. |
| -c | maintained | erase all previously built files for this target before starting the new build. |
| -C | maintained, needs improvement | erase all previously built files for any target before starting the new build. |
| -C | maintained, needs improvement | erase all previously built files for any target before starting the new build. |
| --verbose-compile | maintained | get compilation messages, as when running `make` or `gcc` directly. |
| --verbose-compile | maintained | get compilation messages, as when running `make` or `gcc` directly. |
| --cflags_processor | maintained | used to pass options to the compiler |
| --cflags_processor | maintained | used to pass options to the compiler. |
| --clean-kernel | unknown | no code in the script corresponding to this option |
| --clean-kernel | unknown | no code in the script corresponding to this option |
| --install-system-files | maintained | install oai built binaries in linux system files repositories |
| --install-system-files | maintained | install oai built binaries in linux system files repositories |
| -w | maintained and tested in CI for USRP device | build corresponding oai device and create the soft link to enforce this device usage at run-time |
| -w | maintained and tested in CI for USRP device | build corresponding oai device and create the soft link to enforce this device usage at run-time |
| --phy_simulators | maintained, tested in CI | build all PHY simulators, a set of executables allowing unitary tests of LTE channel implementation within oai. |
| --phy_simulators | maintained, tested in CI | build all PHY simulators, a set of executables allowing unitary tests of LTE and 5G channel implementation within oai. |
| --core_simulators | | |
| --core_simulators | | |
| -s | | |
| -s | | |
| --run-group | | |
| --run-group | | |
| -I | maintained, tested in CI | install external dependencies before starting the build |
| -I | maintained, tested in CI | install external dependencies before starting the build |
| --install-optional-packages | maintained | install optional packages, useful for developing and testing. look at the |
| --install-optional-packages | maintained | install optional packages, useful for developing and testing. look at the check_install_additional_tools function in cmake_targets/tools/build_helper script to get the list |
| | | check_install_additional_tools function in cmake_targets/tools/build_helper script to get the list |
| -g | maintained | Specifies the level of debugging options used to build the binaries. Available levels are `Release`, `RelWithDebInfo`, `MinSizeRe` and `Debug`. If -g is not specified, `Release` is used, if -g is used without any level, `Debug` is used. |
| --eNB | maintained and tested in CI | build `lte-softmodem` the LTE eNodeB |
| --eNB | maintained and tested in CI | build `lte-softmodem` the LTE eNodeB |
| --UE | maintained and tested in CI | build `lte-uesoftmodem` the LTE UE |
| --UE | maintained and tested in CI | build `lte-uesoftmodem` the LTE UE |
| --usrp-recplay | maintained | build with support for the record player. Implementation will be soon reviewed to switch to a run-time option. |
| --gNB | maintained and tested in CI | build `nr-softmodem` the 5G gNodeB |
| --build-lib | maintained | build optional shared library(ies), which can then be loaded at run time via command line option. Use the --help option to get the list of supported optional libraries. |
| --nrUE | maintained and tested in CI | build `nr-uesoftmodem` the 5G UE |
| --UE-conf-nvram | | |
| --usrp-recplay | deprecated | use the USRP configuration parameters to use the record player. |
| --UE-gen-nvram | | |
| --build-lib | maintained | build optional shared library(ies), which can then be loaded at run time via command line option. Use the --help option to get the list of supported optional libraries. `all` can be used to build all available optional libraries. |
| -r | unknown, to be removed | specifies which 3GPP release to build for. Only the default (today rel14) is tested in CI and it is likely that future oai release will remove this option |
| --UE-conf-nvram | maintained | Specifies the path to the input file used by the conf2uedata utility. defaults to [openair3/NAS/TOOLS/ue_eurecom_test_sfr.conf](../openair3/NAS/TOOLS/ue_eurecom_test_sfr.conf) |
| --UE-gen-nvram | maintained | Specifies the path where the output file created by the conf2uedata utility will be placed. Defaults to `target/bin` |
| -V | deprecated | Used to build with support for synchronization diagram utility. This is now available via the T-Tracer and is included if T-Tracer is not disabled. |
| -V | deprecated | Used to build with support for synchronization diagram utility. This is now available via the T-Tracer and is included if T-Tracer is not disabled. |
| --build-doxygen | unknown | build doxygen documentation, many oai source files do not include doxygen comments |
| --build-doxygen | unknown | build doxygen documentation, many oai source files do not include doxygen comments |
| --disable-deadline --enable-deadline --disable-cpu-affinity | deprecated | These options were used to activate or de-activate specific code depending on the choice of a specific linux scheduling mode. This has not been tested for a while and should be implemented as configuration options |
| --disable-deadline --enable-deadline --disable-cpu-affinity | deprecated | These options were used to activate or de-activate specific code depending on the choice of a specific linux scheduling mode. This has not been tested for a while and should be implemented as configuration options |
| --disable-T-Tracer | maintained, to be tested | Remove T_Tracer and console LOG messages except error messages. |
| --disable-T-Tracer | maintained, to be tested | Remove T_Tracer and console LOG messages except error messages. |
| --disable-hardware-dependency | | |
| --ue-autotest-trace --ue-timing --ue-trace | deprecated | Were used to enable conditional code implementing debugging messages or debugging statistics. These functionalities are now either available from run-time options or not maintained. |
| --ue-autotest-trace --ue-timing --ue-trace | deprecated | Were used to enable conditional code implementing debugging messages or debugging statistics. These functionalities are now either available from run-time options or not maintained. |
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# RF Simulator
# RF Simulator
The rf simulator is a oai device replacing the radio heads (for example the USRP device). It allows connecting the oai UE and the oai eNodeB through a network interface carrying the time-domain samples, getting rid of over the air unpredictable perturbations. This is the ideal tool to check signal processing algorithms and protocols implementation.
The rf simulator is a oai device replacing the radio heads (for example the USRP device). It allows connecting the oai UE (LTE or 5G) and respectively the oai eNodeB or gNodeB through a network interface carrying the time-domain samples, getting rid of over the air unpredictable perturbations. This is the ideal tool to check signal processing algorithms and protocols implementation. The rf simulator has some preliminary support for channel modeling.
It is planned to enhance this simulator with the following functionalities:
It is planned to enhance this simulator with the following functionalities:
- Support for multiple UE connections,each UE being a `lte-uesoftmodem` instance.
- Support for multiple UE connections,each UE being a `lte-uesoftmodem` or `nr_uesoftmodem` instance.
- Support for multiple eNodeB for hand-over tests
- Support for multiple eNodeB's or gNodeB's for hand-over tests
- Support for channel modeling
This is an easy use-case to setup and test, as no specific hardware is required. The [rfsimulator page](../targets/ARCH/rfsimulator/README.md) contains the detailed documentation.
This is an easy use-case to setup and test, as no specific hardware is required. The [rfsimulator page](../targets/ARCH/rfsimulator/README.md) contains the detailed documentation.
# L2 nFAPI Simulator
# L2 nFAPI Simulator
This simulator connects a eNodeB and UEs through a nfapi interface, short-cutting the L1 layer. The objective of this simulator is to allow multi UEs simulation, with a large number of UEs (ideally up to 255 ) .Here to ease the platform setup, UEs are simulated via a single `lte-uesoftmodem` instance. Today the CI tests just with one UE and architecture has to be reviewed to allow a number of UE above about 16. This work is on-going.
This simulator connects a eNodeB and UEs through a nfapi interface, short-cutting the L1 layer. The objective of this simulator is to allow multi UEs simulation, with a large number of UEs (ideally up to 255 ) .Here to ease the platform setup, UEs are simulated via a single `lte-uesoftmodem` instance. Today the CI tests just with one UE and architecture has to be reviewed to allow a number of UE above about 16. This work is on-going.
As for the rf simulator, no specific hardware is required. The [L2 nfapi simlator page](L2NFAPI.md) contains the detailed documentation.
As for the rf simulator, no specific hardware is required. The [L2 nfapi simlator page](L2NFAPI.md) contains the detailed documentation.
