Numerology

5g numerology

5g numerology
  1. What is the numerology in 5G?
  2. Why is 5G different in numerology?
  3. What is scalable numerology in 5G?
  4. What is numerology in LTE?

What is the numerology in 5G?

Numerology in 5G/NR refers to Sub Carrier Spacing (SCS). As of Release 17, there are 7 types of numberology (SCS 15, 30, 60, 120, 240, 480, 960 Khz). Even though Numerology is one of the most widely discussed item at 3GPP RAN1 meeting before NR Technical Specification is finalized, it sounds very vague to me.

Why is 5G different in numerology?

Flexible numerology in 5G is much different from numerology found in 4G. It enables a lot of flexibility, but it also introduces new challenges with the way waveforms are built and managed. Now you need to consider subcarrier spacing, UL, DL configurations, and bandwidth parts.

What is scalable numerology in 5G?

A scalable OFDM numerology was required to enable diverse services on a wide range of frequencies and deployments, and finding the right numerology for each scenario is of special relevance for the proper functioning of 5G NR.

What is numerology in LTE?

The numerology is based on exponentially scalable sub-carrier spacing Δf = 2µ × 15 kHz with µ = 0,1,3,4 for PSS, SSS and PBCH and µ = 0,1,2,3 for other channels. Normal CP is supported for all sub-carrier spacings, Extended CP is supported for µ=2 (60kHz).

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