45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
# Procedure to add dedicated Bandwidth part (BWP)
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## Contributed by 5G Testbed IISc
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### Developers: Abhijith A, Shruthi S
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# Terminology #
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## Bandwidth part (BWP) ##
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Bandwidth Part (BWP) is a set of contiguous Resource Blocks in the resource grid.
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Parameters of a BWP are communicated to UE using RRC parameters: BWP-Downlink and BWP-Uplink.
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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.
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# Procedure to run multiple dedicated BWPs #
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A maximum of 4 dedicated BWPs can be configured for a UE.
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To configure multiple BWPs, add the following parameters in the physical parameters section:
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## Setup of the Configuration files ##
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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):
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```
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first_active_bwp = 1;
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bwp_list = ({ scs = 1; bwpStart = 0; bwpSize = 106;},
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{ scs = 1; bwpStart = 0; bwpSize = 51;},
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{ scs = 1; bwpStart = 0; bwpSize = 24;});
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```
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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"
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# Testing gNB and UE in RF simulator
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## gNB command:
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```
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sudo ./nr-softmodem -O ../../../ci-scripts/conf_files/gnb.sa.band78.106prb.rfsim.neighbour.conf --rfsim --rfsimulator.serveraddr server
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```
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## UE command:
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```
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sudo ./nr-uesoftmodem -C 3319680000 -r 106 --numerology 1 --ssb 516 --band 78 --rfsim --rfsimulator.serveraddr 127.0.0.1
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```
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