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Extensible Station PHY Statistics

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Important  The Native 802.11 Wireless LAN interface is deprecated in Windows 10 and later. Please use the WLAN Device Driver Interface (WDI) instead. For more information about WDI, see WLAN Universal Windows driver model.

 

Physical layer (PHY) statistics are based on the number of packets and frames sent or received by the IEEE PHY layer of the 802.11 station, including:

  • Media access control (MAC) service data unit (MSDU) packets.

  • MAC management protocol data unit (MMPDU) frames.

  • MAC protocol data unit (MPDU) frames. Each MSDU packet or MMPDU frame consists of one or more MPDU frames sent or received by the 802.11 station.

When the OID_DOT11_STATISTICS object identifier (OID) is queried, the miniport driver returns the PHYstatistics through the DOT11_PHY_FRAME_STATISTICS structure. This structure contains various PHY statistical counters, including:

  • Total number of all MSDU packets and MPDU/MMPDU frames sent or received successfully by the PHY.

  • Total number of only multicast or broadcast MSDU packets and MPDU/MMPDU frames sent or received successfully by the PHY.

  • Total number of MPDU frames sent or received successfully by the PHY. These counters are incremented for each MPDU fragment sent or received of an MSDU packet or MMPDU frame.

  • Total number of received MPDU frames that were rejected by the PHY due to a duplicate sequence number in the 802.11 MAC header or incorrect frame check sequence (FCS) value in the MPDU frame.

The Native 802.11 miniport driver maintains separate sets of DOT11_PHY_FRAME_STATISTICS structures for each PHY supported by the 802.11 station.

When the OID_DOT11_STATISTICS OID is queried, the miniport driver returns a list of DOT11_PHY_FRAME_STATISTICS structures through the PhyCounters member of the DOT11_STATISTICS structure. The miniport driver must sort this list of PHY statistics in the same order as the list of PHY types previously returned by the driver through a query request of OID_DOT11_SUPPORTED_PHY_TYPES.

For example, the following table shows the correct way of returning the list of DOT11_PHY_FRAME_STATISTICS structures for an 802.11 station that supports a direct-sequence spread spectrum (DSSS) PHY (dot11_phy_type_dsss) and an orthogonal frequency division multiplexing (OFDM) PHY ( dot11_phy_type_ofdm).

List of PHY types List of PHY statistics Index PHY type Index PHY statistics 0

dot11_phy_type_dsss

0

Statistics for DSSS PHY

1

dot11_phy_type_ofdm

1

Statistics for OFDM PHY