5G NR

Channel Setup LTE Coexistence

This property grid sets the parameters for LTE.

For single numerology case, LTE coexistence can only be enabled when the numerology is 15 kHz. For multi-numerology case, LTE coexistence can only be enabled when the 15 kHz resource grid is enabled. Otherwise, there will be an error message at the bottom of GUI, and an error icon on the LTE coexistence button, as shown below.

When LTE-CRS conflicts with other channels, the behaviors are as described in the table below.

LTE-CRS	SS/PBCH	Not Allowed
LTE-CRS	DCI	Not Allowed
LTE-CRS	DL-SCH	Rate Matching
LTE-CRS	DMRS of DL-SCH	Should be illegal case, send DMRS
LTE-CRS	PTRS of DL-SCH	Should be illegal case, send PTRS
LTE-CRS	CSI-RS	Yes, but should on the different subcarriers

This topic describes the following LTE Coexistence properties:

General Settings

Enabled

Enables LTE coexistence. When enabled, the resource elements for LTE-CRS are reserved and not available for PDSCH. It can only be enabled for 15 kHz numerology.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > General Settings > Enabled
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE[:STATe] ON\|OFF\|1\|0 [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE[:STATe]?
SCPI Example
Preset	Off
State Saved	Yes
Initial S/W Revision	A.09.00

Number of LTE-CRS

Sets the number of LTE-CRS, when it changes, the number of LTE-CRS will be changed on GUI with different category.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > General Settings .> Number of LTE-CRS
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS:COUNt <integer> [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS:COUNt?
SCPI Example
Preset	1
Min	1
Max	4
State Saved	Yes
Initial S/W Revision	A.09.00

5GNR UE Capability

additionalDMRS-DL-Alt

Specifies whether the 5GNR UE supports the alternative additional DMRS position for co-existence with LTE CRS.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > 5GNR UE Capability> additional DMRS-DL-Alt
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:DMRS:DALT ON\|OFF\|1\|0 [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:DMRS:DALT?
SCPI Example
Preset	Off
State Saved	Yes
Initial S/W Revision	A.09.00

LTE-CRS

LTE Bandwidth

Sets the LTE bandwidth.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > LTE-CRS 0 > LTE Bandwidth
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:BWIDth BW1M4\|BW3M\|BW5M\|BW10M\|BW15M\|BW20M [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS<channel>:BWIDth?
SCPI Example
Preset	BW5M
State Saved	Yes
Initial S/W Revision	A.09.00

LTE Carrier offset to PointA

Sets the LTE carrier center subcarrier location determined by offset from point A using 15 kHz subcarrier spacing.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > LTE-CRS 0 > LTE Carrier offset to PointA
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:COFFset:APOint <integer> [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:COFFset:APOint?
SCPI Example
Preset	0
Min	0
Max	16383
State Saved	Yes
Initial S/W Revision	A.09.00

LTE Carrier offset to 5GNR Center

Displays the LTE carrier center subcarrier location determined by offset from 5GNR carrier center using the number of 15 kHz subcarrier spacing and frequency offset value in brackets.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > LTE-CRS 0 > LTE Carrier offset to 5GNR Center
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:COFFset:NRCenter?
SCPI Example
Preset	-3276
State Saved	Yes
Initial S/W Revision	A.09.00

MBSFN Subframes

Sets the subframe index, which is to be configured as MBSFN subframes in LTE. Default is empty, which means no subframe for MBSFN. There are 3 ways to configure:

To configure by individual index, use ',' as the delimiter, e.g. 0,1,2,3.
To configure by a range of index, use ':' to indicate the start index and the last index, e.g. 3:5 means 3,4,5.
To configure by a certain step, use two ':' to indicate the start index, the step and the last index, e.g. 0:2:6 means 0, 2, 4, 6.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > LTE-CRS 0 > MBSFN Subframes
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:COFFset:NRCenter?
SCPI Example
State Saved	Yes
Initial S/W Revision	A.09.00

Number of CRS Antenna Ports

Sets the number of antenna ports for LTE-CRS.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > LTE-CRS 0 > Number of CRS Antenna Ports
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:APORt:NUMBer <integer> [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:APORt:NUMBer?
SCPI Example
Preset	1
Min	1
Max	4
State Saved	Yes
Initial S/W Revision	A.09.00

v-shift

Sets the v-shift value for LTE-CRS. It is given by LTE Cell ID mod 6.

GUI Location	Apps > 5G NR > Carrier DL > Downlink > LTE Coexsistence > LTE-CRS 0 > v-shift
SCPI Command	[:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:VSHift <integer> [:SOURce]:RADio:NR5G:WAVeform[:ARB]:CCARrier<carrier>:DLINk:LTE:CRS[0]\|1\|2\|3:VSHift?
SCPI Example
Preset	0
Min	0
Max	5
State Saved	Yes
Initial S/W Revision	A.09.00