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Select the Trigger frame for initiating Coordinated Spatial Reuse

Determine which specific Trigger frame type shall be used to initiate a coordinated spatial reuse transmission in IEEE 802.11bn and define the associated semantics for indicating the shared TXOP duration.

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Background

Coordinated Spatial Reuse (Co‑SR) enables simultaneous transmissions from multiple APs by jointly managing transmit power and timing, improving spectral reuse in dense deployments.

While the overall Co‑SR process is described, the text notes that the precise Trigger frame to start the coordinated transmission has not yet been decided.

References

Once transmit power values are negotiated, the coordinated transmission is triggered by the shared AP through the transmission of a Trigger frame (which one remains to be decided) indicating the shared TXOP duration.

— Wi-Fi: Twenty-Five Years and Counting (2507.09613 - Geraci et al., 13 Jul 2025) in Section 8.2, MAPC Mechanisms — Coordinated Spatial Reuse (Co‑SR)