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Move BWP doc into mac-usage.md

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This commit is contained in:
francescomani
2025-12-03 17:22:06 +01:00
committed by Robert Schmidt
parent 8d2478662d
commit f5b885e803
2 changed files with 26 additions and 44 deletions
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doc/MAC/mac-usage.md
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@@ -420,3 +420,29 @@ Note that you should increase the aggregation level candidates as described in
[the corresponding section above](#pdcch-aggregation-level). This is because the
scheduler has to schedule multiple DCIs in a single DL slots for multiple UL
slots. As a suggestion, you could try `uess_agg_levels = [4, 2, 2, 0, 0]`.
## Multiple Dedicated BWPs
A maximum of 4 dedicated BWPs can be configured for a UE per standard, but only
1 BWP can be active in UL and DL direction at a given time. In the code we
only configure a single BWP for the UE at a given time and we would switch by
reconfiguring this BWP. All this procedure is transparent for users and LOGs
mark BWP switching according to the configuration file enumeration. It is
possible to configure multiple dedicated BWPs and 1st active BWP via
configuration file.
### Setup of the Configuration files ##
In the configuration file you have the option to select the 1st active BWP, the
BWP location and SCS of each BWP in the following way (example with 2
additional BWPs):
```
first_active_bwp = 1;
bwp_list = ({ scs = 1; bwpStart = 0; bwpSize = 106;},
{ scs = 1; bwpStart = 0; bwpSize = 24;});
```
This example configures 3 additional BWPs, with IDs from 1 to 3. A similar
example can be found in configuration file
`ci-scripts/conf_files/gnb-du.sa.band78.106prb.usrpb200.conf` tested in CI.
doc/RUN_NR_multiple_BWPs.md
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# Procedure to add dedicated Bandwidth part (BWP)
## Contributed by 5G Testbed IISc
### Developers: Abhijith A, Shruthi S
# Terminology #
## Bandwidth part (BWP) ##
Bandwidth Part (BWP) is a set of contiguous Resource Blocks in the resource grid.
Parameters of a BWP are communicated to UE using RRC parameters: BWP-Downlink and BWP-Uplink.
A UE can be configured with a set of 4 BWPs in uplink (UL) and downlink (DL) direction (3GPP TS 38.331 Annex B.2 Description of BWP configuration options). But only 1 BWP can be active in UL and DL direction at a given time.
# Procedure to run multiple dedicated BWPs #
A maximum of 4 dedicated BWPs can be configured for a UE.
To configure multiple BWPs, add the following parameters in the physical parameters section:
## Setup of the Configuration files ##
In the configuration file you have the option to select the 1st active BWP, the RIV and SCS of each BWP in the following way (example with 3 additional BWPs):
```
first_active_bwp = 1;
bwp_list = ({ scs = 1; bwpStart = 0; bwpSize = 106;},
{ scs = 1; bwpStart = 0; bwpSize = 51;},
{ scs = 1; bwpStart = 0; bwpSize = 24;});
```
This example configures 3 additional BWPs, with IDs from 1 to 3. Find these parameters in this configuration file: "ci-scripts/conf_files/gnb.sa.band78.106prb.rfsim.neighbour.conf"
# Testing gNB and UE in RF simulator
## gNB command:
```
sudo ./nr-softmodem -O ../../../ci-scripts/conf_files/gnb.sa.band78.106prb.rfsim.neighbour.conf --rfsim --rfsimulator.serveraddr server
```
## UE command:
```
sudo ./nr-uesoftmodem -C 3319680000 -r 106 --numerology 1 --ssb 516 --band 78 --rfsim --rfsimulator.serveraddr 127.0.0.1
```