802.11v PHYs ============== .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Does 802.11v define a new PHY layer?** No — 802.11v is primarily a Wireless Network Management amendment built on existing PHY layers. :contentReference[oaicite:0]{index=0} .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Which PHYs are compatible with 802.11v?** All standard IEEE 802.11 PHYs (a, b, g, n, ac, ax, etc.) can be used with 802.11v features. :contentReference[oaicite:1]{index=1} .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **How does 802.11v interact with radio measurements at PHY?** 802.11v extends radio measurement capabilities, allowing the MAC/management layers to request PHY‑level metrics (e.g. channel load, signal strength). :contentReference[oaicite:2]{index=2} .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Do 802.11v features change modulation or coding schemes?** No, 802.11v does not alter modulation or coding schemes — those remain governed by the PHY standard in use. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Can 802.11v affect how the PHY chooses data rates?** Indirectly — by providing better network context (via management/measurement), it may help devices choose better APs or channels, which influences achievable PHY rates. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Is PHY header format changed by 802.11v?** No, the PHY header and preamble formats remain as defined by the base PHY; 802.11v does not modify PHY framing. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Do 802.11v measurement frames require special PHY timing?** Measurements must respect PHY timing constraints (e.g. sample durations), but 802.11v does not add new timing rules at the PHY level. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **How does 802.11v support channel load reporting at PHY?** Clients or APs report metrics (e.g. busy time, interference) based on PHY observations, conveyed via 802.11v management frames. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Does 802.11v support new frequency bands via PHY?** No — 802.11v works with whatever bands the underlying PHY supports (e.g. 2.4 GHz, 5 GHz, 6 GHz). .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Can 802.11v be used over 6 GHz (Wi-Fi 6E) PHYs?** Yes, provided the device’s PHY supports 6 GHz, 802.11v functionality should be transparent over it. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Does 802.11v require PHY changes to support measurements?** No hardware-level changes are required; it leverages existing PHY measurement capabilities. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **How are PHY metrics integrated in 802.11v decision processes?** PHY metrics like RSSI, signal-to-noise ratio, channel utilization are sent in measurement reports for higher-layer management decisions. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Are PHY error metrics (e.g. bit error rate) reportable via 802.11v?** Potentially, yes — if the device tracks such metrics, 802.11v can carry them in measurement reports. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Does 802.11v influence PHY’s channel scanning behavior?** It may guide the scanning schedule or selection via management hints, but scanning methods are still PHY-driven. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Can 802.11v help with PHY-based interference mitigation?** Indirectly — by reporting channel conditions and facilitating client transitions away from interfered channels. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Does 802.11v add new PHY fields in the payload?** No — 802.11v keeps PHY payload structures intact; all 802.11v data is in the MAC/management portion. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Is there any PHY‑level overhead introduced by 802.11v?** Only minimal, due to slightly larger management frames, but PHY framing overhead remains unchanged. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **How is PHY link quality used in 802.11v transitions?** Link quality measurements from PHY inform BSS Transition decisions via 802.11v IEs. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Does 802.11v affect PHY’s rate fallback behavior?** No — fallback logic is local to PHY/MAC rate control; 802.11v only assists in network-level decisions. .. panels:: :container: container pb-4 :column: col‑lg‑12 p-2 :card: shadow **Where is 802.11v’s PHY support defined officially?** In the IEEE 802.11v-2011 amendment documentation, which extends both MAC and PHY for Wireless Network Management. :contentReference[oaicite:3]{index=3} .. panels:: :container: container pb-4 :column: col-lg-12 p-2 :card: shadow Topics in this section, * :ref:`Reference links ` .. _phy_v_step17: .. tab-set:: .. tab-item:: Reference links * Reference links