Source: 5G NR Numerology
- num0 = low band
- num1 = mid band
For the numerology, we have several terms that we have to be familiar with:
- A radio frame in 5G consists of 10ms duration
- Each frame consists of 10 subframes, making each subframe 1ms duration
- Each subframe consists of slots
title: Frame, Subframe, Slots - NumX = $2^X$ subframes per slot. Ex: Num0 = $2^0$ = 1 subframe per slot ![[Pasted image 20220628171319.png]]
Since I am working on the low band, I only worry about Num0 and Num1, so lower frequencies, i.e. SCS.
- Each slot can have either 14 (normal Control Plane (CP)) or 12 (extended CP) OFDM symbols.
- All the subcarrier spacing options have 14 OFDM symbols
- This enables slot based scheduling. One slot is the possible scheduling unit and slot aggregation is also allowed.
- Logically, Slot length = ms.
- Higher num () = higher frequency = lower period
title: What about [[CORESET|Resource Element]], [[CORESET|Resource Block]], [[CORESET|Resource Grid]]? This is a major AHA moment. So After you zoom into a subframe, you now have the division with [[CORESET|Resource Element]], [[CORESET|Resource Grid]], etc. See the [[CORESET]] page for the details. ![Resource Element and Block](https://devopedia.org/images/article/310/7054.1617555991.png)
Mini-slot ? Mini-slot occupies 2, 4 or 7 OFDM symbols. It enables non-slot based scheduling. It is minimum scheduling unit used in 5G. As mentioned mini-slots can occupy as little as 2 OFDM symbols and are variable in length. They can be positioned asynchronously with respect to the beginning of a standard slot.
• There are two frequency ranges supported in 5G NR viz. FR1 and FR2.
• FR1 supports frequencies below 6 GHz where as FR2 supports frequencies above 6 GHz (i.e. mmwave range).
• FR1: Frequency range is from 450 to 6000 MHz
• FR2: Frequency range is from 24250 to 52600 MHz
Refer complete 5G NR Frequency Bands >>.