5G NR

BWP Setup Uplink

The uplink consist of signals that are used for reception and transmission of the channels and the channels themselves that carry the higher level data.

The signals are:

DM-RS - Demodulation Reference Signals for PUSCH/PUCCH and UCI that provide synchronization and channel information.
PT-RS - Phase Tracking Reference Signals for (PUSCH) used for phase tracking and phase noise compensation.
SRS - Sounding Reference Signals are transmitted enable the eNodeB to perform channel sounding.

The channels are:

UCI - Uplink Control Channel
PUCCH - Physical Uplink Control Channel
PUSCH - Physical Uplink Shared Channel
PRACH - Physical Random Access Channel

A feature of 5G NR is a Bandwidth Part (BWP). With cells being up to 400-MHz wide, very complex processing would be required to cover the entire bandwidth. BWP is a contiguous set of physical resource blocks (PRBs) on a given carrier. These RBs are selected from a contiguous subset of the common resource blocks for a given numerology (u). Reserved resources can be configured within the BWP and each BWP has its own numerology, that is, subcarrier spacing and cyclic prefix (CP).

Up to four BWPs can be allocated, but only one BWP in the downlink and one in the uplink is active at a given time. Configuration parameters include:

Numerology, the subcarrier space, with a cyclic prefix (CP)

CP is used to mitigate the effects of channel delay spread and intersymbol interference. CP provides a buffer to protect the OFDM signal from inter-symbol interference by repeating the end of the symbol at the start of the same symbol. While this reduces the achievable data rate, it completely eliminates the inter-symbol interference up to the length of the CP. In 5G NR, as subcarrier space changes, the cyclic prefix length also scales accordingly, making it possible to adapt the CP length to the channel conditions.

RB Offset (N_BWP_start)

RB Number (N_BWP_size)

Add BWP

Adds a new Bandwidth Part (BWP) to the setup table. BWP setup nodes are required so that each data channel can select which BWP to use. The maximum number of supported BWPs is 16.

GUI Location	Apps > 5G NR > Carrier > Carrier n (UL) > BWP Setup > + Add BWP
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP:ADD
SCPI Example	RAD:NR5G:WAV:CCAR0:ULINk:BWP:ADD

Delete BWP

Deletes the selected BWP from the setup table.

GUI Location	Apps > 5G NR > Carrier > Carrier n (UL) > BWP Setup > - Remove BWP
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP:DELete <integer>
SCPI Example	RAD:NR5G:WAV:CCAR0:ULINk:BWP:DEL 1

Copy BWP

Copies the currently selected BWP to the last column of the setup table. The maximum number of supported BWPs is 16.

GUI Location	Apps > 5G NR > Carrier > Carrier n (UL) > BWP Setup > Copy BWP
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP:COPY <integer>
SCPI Example	RAD:NR5G:WAV:CCAR0:ULIN:BWP:COPY 1

BWP Count

Displays or queries the number of BWPs configured.

GUI Location	Apps > 5G NR > Carrier > Carrier n (UL) > BWP Setup > displays the configured BWPs
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP:COUNt?
SCPI Example	RAD:NR5G:WAV:CCAR0:ULINk:BWP:COUN?
Preset	1
State Saved	No

BWP_ID

Displays the ID of current BWP, it is automatically generated based on the index of the BWP array.

GUI Location	Apps > 5G NR > Carrier UL >Uplink > BWP > BWP ID
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP<bwp>:ID?
SCPI Example	RAD:NR5G:WAV:CCAR0:ULINk:BWP0:ID?
Preset	0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6 \| 7
State Saved	Yes

Name

Displays the auto-filled, read-only name of the BWP. It is used to select the BWP for the data channel.

GUI Location

Apps > 5G NR > Carrier UL > Uplink > BWP > Name

Numerology

Specifies the numerology used by the BWP. Numerology specifies the subcarrier spacing and cyclic prefix definition used for this bandwidth part. Numerology affects symbol duration and the number of subcarriers possible for a given carrier bandwidth.

When Cell-Specific > Numerology Mode is set to Single Numerology, the BWPs numerology setting is coupled to the value set in the Carrier (Cell-Specific) numerology.

When Cell-Specific > Numerology Mode is set to Multiple Numerologies, a Resource Grid tab is added to the bottom pane of the GUI where you can select one to three numerologies for the selected Bandwidth.

For FR1, the choices are: 15 kHz, 30 kHz, or 60 kHz.

For FR2, the choices are: 60 kHz, 120 kHz, and 240 kHz.

GUI Location	Apps > 5G NR > Carrier UL > Uplink > BWP > Numerology
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP<bwp>:NUMerology MU0\|MU1\|MU2Ncp\|MU2Ecp\|MU3\|MU4 [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP<bwp>:NUMerology?
SCPI Example	RAD:NR5G:WAV:CCAR0:ULINk:BWP1:NUM MU0 RAD:NR5G:WAV:CCAR0:DLINk:BWP1:NUM?
Couplings	Coupled with Numerology Mode and Numerology Enable of resource grid and carrier numerology. When Numerology Mode is single mode, this setting’s value will be coupled to be same with carrier numerology. When Numerology Mode is multiple mode, the value ranges of this setting are those Numerology Enable of resource grid being enabled except MU2Ncp\|MU2Ecp. For example if Numerology Enable of resource grid with numerology 0 and 1 are enabled, then this setting’s value range will be u = 0: 15 kHz \| u = 1: 30 kHz. When current value of this setting is not in the valid value ranges, this setting will be coupled to the valid value automatically. For initial BWP Auto Configuration == On Numerology Value is determined by MIB subcarrierSpacingCommon (RMSI-scs), and subcarrierSpacingCommon also has other dependencies. subcarrierSpacingCommon = 15kHz => μ = 0 : 15kHz subcarrierSpacingCommon = 30kHz => μ = 1 : 30kHz subcarrierSpacingCommon = 60kHz => μ = 2 : 60kHz Normal CP subcarrierSpacingCommon = 120kHz => µ = 3: 120 kHz Auto Configuration == Off SingleNumerology Mode Numerology value = carrier Numerology value. MultiNumerology Mode Numerology choices: those being enabled resource grids For example if Numerology Enable of resource grid with numerology 0 and 1 are enabled, then this setting’s value range will be u = 0: 15 kHz \| u = 1: 30 kHz. Non-initial BWP SingleNumerology Mode Numerology value = carrier Numerology value. MultiNumerology Mode Numerology choices: those being enabled resource grids
Preset	MU1
State Saved	Yes

RB Offset (N_BWP_start)

Sets the RB offset of the current bandwidth part (BWP) relative to CRB0.

A resource block (RB) consists of 12 contiguous subcarriers. The RB Number determines the contiguous amount of spectrum available to the specified BWP, starting from the RB Offset within the containing component carrier. The maximum number of RBs potentially available to this BWP is determined by the numerology of this BWP and the maximum RB limit specified for the component carrier for that particular numerology.

GUI Location	Apps > 5G NR > Carrier UL > Uplink > BWP > RB Offset (N_BWP_start)
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP<bwp>:RB:OFFSet <integer> [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP<bwp>:RB:OFFSet? [MAXimum\|MINimum]
SCPI Example	RAD:NR5G:WAV:CCAR0:DLINk:BWP1:RB:OFFS 3 RAD:NR5G:WAV:CCAR0:DLINk:BWP1:RB:OFFS?
Couplings	For Initial BWP, if Auto Configuration is ON, this setting cannot be set and the value is calculated automatically. For BWP1 , this setting is settable and readable. The maximum value of this setting couples with Numerology Mode and resource grid defined in carrier Preset to 126 for Initial BWP Preset to 0 for other BWPs.
Preset	126 \| 0 \| 0 \|0 \| 0 \| 0 \| 0 \|0
State Saved	Yes
Min	0
Max	272
Resolution	1

RB Number (N_BWP_size)

Set the resource block (RB) number of the bandwidth part (BWP).

GUI Location	Apps > 5G NR > Carrier UL > Uplink > BWP > RB Number (N_BWP_size)
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP<bwp>:RB:NUMBer <integer> [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:ULINk:BWP<bwp>:RB:NUMBer? [MAXimum\|MINimum]
SCPI Example	RAD:NR5G:WAV:CCAR0:ULINk:BWP1:RB:NUMB 100 RAD:NR5G:WAV:CCAR0:ULINk:BWP1:RB:NUMB?
Couplings	For Initial BWP, if Auto Configuration is On, this setting cannot be set and the value is calculated automatically. For BWP1, this setting is settable and readable.
Preset	24 \| 273 \| 273 \|273 \| 273 \| 273 \| 273 \|273
State Saved	Yes
Min	1
Max	273
Resolution	1