Help with 802.11ah standard

Projects
1

I’ve having interference issues again.

This time at Hyde Park Winter Wonderland.

I have a suspicion that some of the European equipment there is using the European 802.11ah frequencies which are the same as the frequencies I use here, 868Mhz.

I’m looking for the 802.11ah individual channel frequencies but am struggling to find them.

Does anyone know where I can find them?

2

https://helpfiles.keysight.com/csg/n7617/Content/Main/802.11ah%20Introduction.htm

This is the most information I’ve found so far

3

Is ChatGPT’s info any use? If not, maybe be more specific on what info you want.

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In the UK, 802.11ah (Wi-Fi HaLow) operates in the 863 MHz to 868 MHz band, which is regulated by Ofcom and falls under the ETSI (European Telecommunications Standards Institute) standards. Here’s a breakdown of how individual channel frequencies are defined:

802.11ah Frequency Allocation in the UK

• Frequency Band: 863 MHz to 868 MHz

• Channel Bandwidths: 1 MHz, 2 MHz, 4 MHz, 8 MHz, and 16 MHz

• Number of Channels: Up to 5 channels for a 1 MHz bandwidth

Individual Channel Frequencies (1 MHz Bandwidth)

Channels are spaced 1 MHz apart within the 5 MHz available:

Channel Number Center Frequency (MHz)

Channel 1 863.5

Channel 2 864.5

Channel 3 865.5

Channel 4 866.5

Channel 5 867.5

Wider Bandwidth Configurations

For larger bandwidths, fewer channels are available:

  1. 2 MHz Bandwidth:

• Center frequencies: 864 MHz, 866 MHz

• Only two channels fit within the band.

  1. 4 MHz Bandwidth:

• Center frequency: 865 MHz

• Only one channel fits within the 863–868 MHz range.

  1. 8 MHz and 16 MHz Bandwidths:

• These configurations are typically unavailable in the UK due to the limited spectrum range.

Regulatory Restrictions

• Power Limits: UK regulations enforce a 25 mW EIRP (Effective Isotropic Radiated Power) limit in the 863–868 MHz band for short-range devices like 802.11ah.

• Usage: This band is primarily for low-power, wide-area networks (LPWAN) and IoT applications, making it ideal for Wi-Fi HaLow’s use cases (e.g., long-range, low-power connections).

For exact implementation and device compatibility, manufacturers must ensure their equipment complies with ETSI EN 300 220 and Ofcom’s regulatory framework for sub-1 GHz communication.

4

Thanks that’s sightly more information than I found. I’ll keep looking for the German/EU channel frequencies.

(I don’t trust ChatGPT, it’s often wrong and often just guesses)