When numerology is set to either 15 kHz or 30 kHz, the Intra-Cell Guard Band parameter is added to the Carrier Node.
Intra-Cell Guard Band (u = 0) for 15 kHz
Intra-Cell Guard Band (u = 1) for 30 kHz
When Numerology Mode is set to Multiple Numerologies, and both 15 kHz and 30 kHz Numerologies are enabled, both Intra-Cell Guard Band (u = 0) and Intra-Cell Guard Band (u = 1) will be available for use.
The default value for Intra-Cell Guard Band (u = 0) and Intra-Cell Guard Band (u = 1) is None, which means Intra-Cell Guard Band is not defined. When the right button of Intra-Cell Guard Band (u = ) is selected, a dialog window opens.
There is no guard band in the list by default. User can add or remove by selecting the buttons on the top bar. Here is an example.
At the bottom of the dialog, the RB-Set definitions are calculated. In the specification, the number of RB in one RB set is limited to 50-55 for 15 kHz and 100-110 for 30 kHz. The software does not limit you to these restrictions to provide more flexible configurations.
There is the limitation to the Guard band values to make the RB set definition valid:
The Guard Band Start of the first guard band cannot be less than 1.
The Guard Band Size cannot be less than 0.
The Guard Band End of the last guard band should be smaller than the last RB index in the grid.
The Guard Band Start of one Guard Band cannot be smaller than Guard Band End of proceeding guard band.
When the settings are invalid, the input value will be coupled to a valid value or there will be an error message at the bottom of the dialog and the “OK” button is not active.
When the numerology of the BWP is 15 kHz and Intra-Cell Guard Band (u = 0) is defined (not set to None), or the BWP is 30 kHz and Intra-Cell Guard Band (u = 1) is defined (not set to None), a new parameter, Frequency Monitor Location, will be displayed.
Frequency Monitor Location is a string formed by 0 and 1. One digit in the string defines whether the RB Set is used in the CORESET, so the length of the string is the number of RB Set covered by the BWP. A "1” means the RB Set is used in this CORESET and “0” means the RB Set is not used in this CORESET.
When the right button of Frequency Monitor Location is selected, a pop-up window displays a checkbox. Each checkbox is for one bit, and one RB Set.
When Intra-Cell Guard Band is defined, the number of bits in the Frequency Domain Bitmap is also defined by the number of RBs in RB Set instead of number of RBs in BWP.