WDI_TLV_FTM_RESPONSE (dot11wificxtypes.hpp)
Important
This topic is part of the WiFiCx driver model. WiFiCx is the Wi-Fi driver model released in Windows 11. We recommend that you use WiFiCx to take advantage of the latest features. The previous Wi-Fi driver model WDI is in maintenance mode and will only receive high priority fixes.
WDI_TLV_FTM_RESPONSE is a TLV that contains Fine Timing Measurement (FTM) response information from a BSS target.
This TLV is used in the payload data of an NDIS_STATUS_WDI_INDICATION_REQUEST_FTM_COMPLETE task completion indication.
TLV type
0x163
Length
The sum (in bytes) of the sizes of all contained TLVs.
Values
| TLV | Type | Multiple TLV instances allowed | Optional | Description |
|---|---|---|---|---|
| WDI_TLV_BSSID | WDI_MAC_ADDRESS | The BSSID of the target to which this FTM response belongs. | ||
| WDI_TLV_FTM_RESPONSE_STATUS | WDI_FTM_RESPONSE_STATUS | The FTM response status. If success, the rest of the fields in this TLV are present. | ||
| WDI_TLV_RETRY_AFTER | UINT16 | A duration, in seconds, that should pass before trying to request a new FTM from this target. | ||
| WDI_TLV_FTM_NUMBER_OF_MEASUREMENTS | UINT16 | The number of measurements used to provide the round trip time (RTT). If the FTM response status was a success, this field is mandatory. | ||
| WDI_TLV_BSS_ENTRY_SIGNAL_INFO | INT32 | The received signal strength indicator (RSSI) from the FTM target. This is in units of decibels referenced to 1.0 milliwatts (dBm). If the FTM response status was a success, this field is mandatory. | ||
| Same as row above | UINT32 | The link quality value of the FTM target, ranging from 0 through 100. A value of 100 specifies the highest link quality. If the FTM response status was a success, this field is mandatory. | ||
| WDI_TLV_FTM_BANDWIDTH_USED | WDI_FTM_BANDWIDTH | The negotiated bandwidth in MHz between the two STAs to exercise the FTM. If the FTM response status was successful, this field is mandatory. | ||
| WDI_TLV_RTT | UINT32 | The measured roundtrip time (RTT), in picoseconds. If the FTM response status was a success, this field is mandatory. | ||
| WDI_TLV_RTT_VARIANCE | UINT64 | If more than one measurement was used to calculate the RTT, this field provides the statistical variance of the measurements used. | ||
| WDI_TLV_FTM_PROPAGATION_PROPERTY | WDI_FTM_PROPAGATION | X | This field is used when the LE has logic to estimate properties about the propagation of the signal. It's okay if only certain values can be provided. | |
| WDI_TLV_LCI_REPORT_STATUS | WDI_LCI_REPORT_STATUS | If an LCI report was requested, this field provides the status result. If successful, the following fields are present and mandatory. | ||
| WDI_TLV_LCI_REPORT_BODY | TLV<LIST<UINT8>> | The Location Configuration Information (LCI) report, as defined in Section 9.4.2.22.10 of the 802-11-2016 standard, including the LCI subelement and other Optional subelements available. In other words, this is the measurement report section of the Measurement Report element (as per Section 9.4.2.22 from the 802-11-2016 standard). |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11 |
| Minimum supported server | Windows Server 2022 |
| Header | dot11wificxtypes.hpp |