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What is Dynamic Spectrum Sharing (DSS) in 5G NR and 4G LTE ?

This page describes dynamic spectrum sharing (DSS). It mentions difference between static spectrum and dynamic spectrum.

The concept of DSS (Dynamic Spectrum Sharing) allows operation of both 5G NR and 4G LTE in the same frequency spectrum. Moreover it permits allocation of frequencies to mobile devices as per demand of users. This is called dynamic allocation of frequency resources from a pool of spectrum.

Example without DSS:
40 MHz spectrum is divided into two parts in which one part (say 20 MHz) is used for 4G LTE users and the other part (say remaining 20 MHz) is used for 5G NR users. This leads to inefficient usage of spectrum as dedicated spectrum is allocated for LTE and 5G users. If the spectrum is not being used by LTE, the entire part of spectrum goes wasted.

Dynamic Spectrum Sharing
Image Courtesy : MOBILE WORLD LIVE

Example with DSS (Dynamic Spectrum Sharing):
40 MHz spectrum is shared among 4G LTE and 5G NR users. This offers efficient usage of spectrum without any unused parts. Figure depicts the concept of DSS.

5G NR Numerology | 5G NR Terminology

5G NR Control channels | 5G NR Traffic Channels | 5G NR Reference Signals and sequences


This 5G tutorial also covers following sub topics on the 5G technology:
5G basic tutorial
5G Frequency Bands
5G millimeter wave tutorial
5G mm wave frame
5G millimeter wave channel sounding
Difference between 4G and 5G
5G testing and test equipments
5G network architecture
5G NR Physical layer
5G NR MAC layer
5G NR RLC layer
5G NR PDCP layer

LoRaWAN related links

The LoRaWAN Wireless tutorial covers following sub topics:
LoRaWAN Smart Parking   LoRaWAN sensor design   LoRaWAN smart healthcare system   LoRaWAN smart water metering   LoRaWAN architecture   LoRaWAN Interface Types   LoRaWAN roaming types   LoRa tutorial   LoRa Frequency Bands   LoRa protocol stack   LoRa MAC layer   LoRaWAN classes   LoRa features   LoRa Transceiver module  

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Difference between SISO and MIMO
Difference between TDD and FDD
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Fixed wimax vs mobile

RF and Wireless Terminologies