editing functions for adding, removing, and copying rows appear directly above the editor. As you make edits, the Channel Allocation graph updates and, if a channel conflict occurs, an error message appears, describing the conflict.5G NR
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:
LTE Carrier offset to 5GNR Center
Many of the channel types described in this topic provide a convenient channel editor, in table format, for convenient viewing and configuring of multiple channels. The editing functions for adding, removing, and copying rows appear directly above the editor. As you make edits, the Channel Allocation graph updates and, if a channel conflict occurs, an error message appears, describing the conflict.
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
