maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add 7.2 documentation and a reference DU config file for DAS scenario

Browse Source 
Co-authored-by: Teodora Vladić <teodora.vladic@openairinterface.org>
This commit is contained in:
francescomani
2026-01-14 14:32:35 +01:00
committed by Teodora
co-authored by Teodora Vladić
parent 699a5453a0
commit f09a74fbb3
3 changed files with 289 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
doc/ORAN_FHI7.2_Tutorial.md
+20 -15
View File
@@ -1123,24 +1123,32 @@ The assumed configuration is that with N RUs each having an M×M configuration,
we effectively reach an (N×M)×(N×M) configuration.
Some caveats:
- Since it's a distributed antenna, this implies that this setup will deploy a
- Even in case of a distributed antenna, this setup will deploy a
single cell only -- multiple cells on different RUs are not supported.
- All RUs should use the same MTU, so either "normal" (1500 byte) MTU or jumbo
frames, but not a mix of both.
- We tested only two RUs as of now, i.e., an 8×8 configuration.
- Testing is currently limited to 4 logical antenna ports in DL; in UL, up to 8 can be used.
- In case of a single array is currently limited to 4 logical antenna ports in DL;
in UL, up to 8 can be used.
For two RUs each using a 4x4 configuration, make sure to configure the 8x8
configuration, i.e., set `nb_tx` and `nb_rx` under `RUs` to 8 each (NOT two
`RUs`!). Also, set the antenna port information as listed above, i.e.,
For two RUs using a 8x8 configuration, i.e. a single antenna system, the reference DU configuration file is
[`gnb-du.sa.band77.273prb.fhi72.8x8-benetel650_650.conf`](../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb-du.sa.band77.273prb.fhi72.8x8-benetel650_650.conf).
```
pdsch_AntennaPorts_XP = 2;
pdsch_AntennaPorts_N1 = 2;
pusch_AntennaPorts = 8;
maxMIMO_layers = 2;
```
Once testing for 8 antenna ports in DL is complete, we will change pdsch_AntennaPorts_N1 to 4.
For two RUs each using a 4x4 configuration, i.e. a distributed antenna system (DAS),
we use the analog beamforming implementation. More details can be found in
[this document](./analog_beamforming.md). It is important to note that
the configuration file should be set as a 4x4 scenario and each RU would be given a
different beam. The reference DU configuration file is [`gnb-du.sa.band77.273prb.fhi72.4x4-das-benetel650_650.conf`](../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb-du.sa.band77.273prb.fhi72.4x4-das-benetel650_650.conf).
DAS is enabled by setting to 1 the parameter `enable_das` in `L1` section.
The following parameters shall be configured on the gNB in the `MACRLC` section:
- `set_analog_beamforming`
- `beam_duration`
- `beams_per_period`
For guidance on how to set these parameters please refer to
the [analog beamforming document](./analog_beamforming.md).
Next, configure the `fhi_72` section as indicated below:
@@ -1202,9 +1210,6 @@ fhi_72 = {
```
</details>
Compare also with the example (DU) configuration in
[`gnb-du.sa.band77.273prb.fhi72.8x8-benetel650_650.conf`](../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb-du.sa.band77.273prb.fhi72.8x8-benetel650_650.conf).
Afterwards, start the gNB with the modified configuration file. If everything
went well, you should see the RU counters for both RUs go up: