802.11ai PHYs
==============


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        **What PHY standards does 802.11ai build upon?**

        802.11ai builds upon existing PHY standards like 802.11a/n/ac/ax without modifying the physical layer.

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        **Does 802.11ai introduce new modulation schemes?**

        No, it uses modulation and coding schemes defined by the underlying PHY standards.

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        **How does 802.11ai utilize PHY measurements?**

        PHY measurements such as signal strength and link quality assist in network management and client steering.

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        **Are there any PHY layer changes in 802.11ai?**

        No, 802.11ai does not modify the PHY layer; enhancements are at the MAC and higher layers.

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        **How does 802.11ai support fast initial link setup (FILS) at the PHY?**

        FILS uses standard PHY structures and signaling to achieve fast authentication and association.

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        **What role does the PHY layer play in power saving for 802.11ai?**

        PHY layer measurements enable better scheduling of wake/sleep cycles for power efficiency.

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        **Does 802.11ai support beamforming at the PHY?**

        Beamforming capabilities depend on the underlying PHY standard; 802.11ai does not change this.

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        **Can 802.11ai operate over multiple PHY types simultaneously?**

        Yes, it is designed to be compatible with various PHYs, depending on device support.

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        **How does 802.11ai PHY support low latency?**

        By leveraging existing PHY features and efficient MAC protocols, it minimizes delay during connection setup.

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        **Is PHY rate adaptation influenced by 802.11ai?**

        PHY rate adaptation remains as defined by base standards but benefits from management feedback enabled by 802.11ai.

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        **Does 802.11ai support OFDMA at the PHY?**

        OFDMA support depends on the underlying PHY (e.g., 802.11ax); 802.11ai uses whatever PHY is present.

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        **How does 802.11ai enhance PHY and MAC coordination?**

        It uses PHY feedback for MAC-layer decisions such as client steering and power management.

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        **Are new PHY headers introduced in 802.11ai?**

        No new PHY headers; it uses standard preambles and signaling for compatibility.

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        **Can 802.11ai PHY operate on DFS channels?**

        Yes, operation on DFS channels is compliant with regulations and underlying PHY capabilities.

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        **How does 802.11ai handle PHY-layer interference?**

        PHY-layer metrics help detect interference and enable network-assisted mitigation strategies.

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        **Does 802.11ai affect the transmit power settings at the PHY?**

        Transmit power control is managed per PHY standards; 802.11ai uses these controls for optimization.

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        **Is MIMO supported by 802.11ai PHY?**

        Yes, MIMO is supported according to the underlying PHY standard.

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        **Where can I find more detailed PHY specifications for 802.11ai?**

        Detailed PHY specs are found in the IEEE 802.11 PHY amendments such as 802.11a/n/ac/ax, which 802.11ai builds upon.


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        Topics in this section,

                * :ref:`Reference links <phy_ai_step17>`


.. _phy_ai_step17:

.. tab-set::

    .. tab-item:: Reference links

       * Reference links