Description

Ericsson Frequency band definitions

List of Ericsson bands referring to 3GPP operating bands

Ericsson band definitions , Telecommunication frequency range

— “Sub-band” means that a product operates on a limited part of a full 3GPP defined band. (Note: B0A is a sub-band to 3GPP band 8.)
— The document lists frequency ranges and names for Ericsson bands (from 34/1056-HRB 105 600).
— Naming example:

— No information on the RAT used per band is given.

FDD bands:

FDD (Frequency Division Duplex) band frequencies refer to the separate, distinct frequency blocks of spectrum allocated for different directions of communication, with one block for the uplink (e.g., phone to tower) and another for the downlink (tower to phone). Common FDD bands include Band 1 (2100 MHz), Band 3 (1800 MHz), Band 8 (900 MHz), and Band 20 (800 MHz), with the specific bands varying by country and operator.

What is FDD? 

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SDL bands

SDL band frequencies vary, but a key example is the 1500 MHz band (LTE Band 75 / NR Band n75), which is specifically used for Supplementary Downlink (SDL) transmissions from the base station in some regions like Austria, providing additional downlink capacity. Another mentioned SDL band is part of the 700 MHz band (e.g., NR Band n29). SDL is a feature in 5G technology that provides extra downlink bandwidth to enhance network coverage and capacity.

What is SDL?

Purpose:
SDL (Supplementary Downlink) provides additional downlink (base station to device) bandwidth, especially to improve user experience and capacity in areas with coverage challenges.
Context:
It is a feature of 5G and other mobile technologies, often used in conjunction with other frequency bands to create a more robust network.
Examples of SDL Bands
1500 MHz Band (Band 75 / n75):
In some countries, like Austria, this band (1452-1492 MHz) is designated for SDL, offering a balance between capacity and coverage.
700 MHz Band (Band n29):
Some configurations of the 700 MHz band are also specified as an SDL band in 5G NR standards.

How it Works

SDL uses unpaired spectrum, meaning the uplink and downlink frequencies are separate.
It can be aggregated with other LTE or 5G bands to provide the supplementary downlink capacity.

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SUL Bands

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TDD bands

TDD bands are specific frequency ranges designated for Time Division Duplexing, a wireless communication method where the same frequency is used for both transmitting and receiving data by alternating between them in a time-slotted manner. Common TDD bands include the 2300 MHz band (LTE Band 40, 5G NR Band n40) which is widely used globally, and various bands within the 1-6 GHz (5G mid-band) and 24 GHz – 100 GHz (5G mmWave) ranges.

How TDD Works

Shared Frequency:
Unlike FDD (Frequency Division Duplexing) which uses separate frequencies for transmission and reception, TDD uses a single frequency band for both.
Time-Slotting:
The device and the base station alternate between transmitting and receiving data in rapid, time-sensitive slots.
Examples:
For 4G, LTE Band 40 is a prime example of a TDD band. For 5G, TDD is used across a range of frequencies, including the 5G mid-band and the high-frequency mmWave bands.

Examples of TDD Frequency Bands
LTE Band 40 (2300 MHz): A widely supported TDD band for 4G, also known as 5G NR Band n40.
5G Low-Band: TDD can be used in frequencies below 1 GHz, though it’s often paired with FDD in this range.
5G Mid-Band: A common use of TDD is in the 1-6 GHz frequency range for 5G.
5G mmWave: High-frequency bands, from 24 GHz to 100 GHz, are primarily designated for TDD.
Key Characteristics

Flexibility:
TDD offers greater flexibility in balancing upload and download capacity, as the time slots can be adjusted to meet varying demand.
Device Support:
Bands like the 2300 MHz TDD band are well-supported by end devices due to their widespread use in many countries.

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All information about telecommunication frequency range  

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