Preamble Puncturing in Wi-Fi 7

Preamble Puncturing in Wi-Fi 7 helps your internet stay fast even when there’s interference. Instead of shutting down the whole channel, Wi-Fi 7 blocks only the affected part and keeps using the rest, ensuring smooth and uninterrupted connectivity.

🛑 Real-Time Example:

You are watching a 4K YouTube video at a Wi-Fi 7 enabled cafe. The Wi-Fi router (AP) is using a 320 MHz-wide channel to provide high-speed internet.

✓Problem: Interference Appears

A microwave oven in the cafe starts running.

It interferes with a small part of the Wi-Fi channel (20 MHz out of 320 MHz).

In older Wi-Fi versions (like Wi-Fi 6), the entire wide channel might be dropped, slowing your video down.

🚀 Wi-Fi 7 Solution: Preamble Puncturing

Instead of dropping from 320 MHz to a lower bandwidth, Wi-Fi 7 blocks (punctures) only the 20 MHz affected by interference.

The remaining 300 MHz continues working, so your video plays smoothly without buffering.

🛑 Analogy:

Think of Wi-Fi channels like a highway with 16 lanes (320 MHz).

If a small part of the road is blocked (20 MHz interference), Wi-Fi 7 closes only those lanes while keeping traffic flowing in the remaining lanes.

In older Wi-Fi versions, the entire road might have been reduced to 8 lanes, causing traffic jams (slower internet).

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