User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
97
Use Report Type
Enables you to select the UE CQI report type on which the selection of downlink MCS is based. This must
be used in conjunction with MCS Based on CQI set to On and with an appropriately configured scenario
file.
Wideband: Use this setting to select the downlink MCS index based on wideband CQI reports.
Subband: Use this setting to select the downlink MCS index based on subband CQI reports. The MCS
index is based on the best subband CQI report (the one with the highest value of CQI). Using this setting
also means that the DL allocation moves in frequency to the subband represented by that report.
This setting can only be used when the number of resource blocks selected by either the resource block
size (RB Size)
or the Type 0 Bitmap (Type0 Bitmap) parameter is less than or equal to the current DL
PDSCH resource block size allocation.
For example: If the RB Size is ≤ 6 RBs for a 10 MHz channel bandwidth, Subband may be selected.
However, for RB Size values > 6, you must select Wideband.
Mode
BSE, FDD
Range
Wideband | Subband
Preset
Wideband
Dependencies and/or Couplings • MCS Based on CQI must be set to On to access this function.
• Selecting Subband depends upon the current DL PDSCH RB size
allocation.
Initial S/W Revision
6.3
Key Path Mode > BSE > Mode Setup> More > PHY Settings > DL Resource
Allocation > CQI Reports
Random Subband Selection
Enables the random selection of subband regardless of the UE CQI Subband actual reports. When this is
enabled, the subband used is selected randomly (with each subband having equal probability) rather than
making the selection based on the best subband reported. When this selection is enabled, the DL Start RB
(RB Start
) key is not available (grayed out) since the DL start RB is dynamically (randomly) selected. To
use this feature, the number of resource blocks in the DL allocation must be less than or equal to the
subband size (which is different depending on bandwidth – see 3GPP TS 36.213 table 7.2.1-3)
Mode
BSE, FDD
Range
On | Off
Preset
Off
Initial S/W Revision
6.3
Key Path Mode > BSE > Mode Setup> More > PHY Settings > DL Resource
Allocation > CQI Reports
I_MCS sf-control
Accesses the key menu that enables you to specify the MCS index for a specific subframe used by the UE
for downlink transmissions.