Which IEEE 802.11 standard uses Round Trip Time measurements and Fine Time Measurements to calculate distance to an AP?

Which IEEE 802.11 standard uses Round Trip Time measurements and Fine Time Measurements to calculate distance to an AP?

• A. 802.11ah
• B. 802.11mc
• C. 802.11be
• D. 802.11v

Answer: (B)

RTT measurements with Fine Timing Measurement are used to gauge how far a device is from an AP by measuring the time it takes for signals to travel between them. 802.11mc introduces this precise ranging capability, using timestamped FTM exchanges between the client and the AP to compute distance based on the round-trip time. With accurate timing and multiple measurements, you can estimate indoor distance to an AP with sub-meter precision under good conditions, which enables location-based services and improved positioning. Other standards focus on different goals: 802.11ah targets long-range, low-power operation in sub-1 GHz bands; 802.11be (Wi‑Fi 7) aims for higher throughput and new features; 802.11v handles network management and mobility enhancements but does not define RTT/FTM-based ranging. Therefore, the standard that uses Round Trip Time measurements and Fine Timing Measurement to calculate distance to an AP is 802.11mc.

RTT measurements with Fine Timing Measurement are used to gauge how far a device is from an AP by measuring the time it takes for signals to travel between them. 802.11mc introduces this precise ranging capability, using timestamped FTM exchanges between the client and the AP to compute distance based on the round-trip time. With accurate timing and multiple measurements, you can estimate indoor distance to an AP with sub-meter precision under good conditions, which enables location-based services and improved positioning.

Other standards focus on different goals: 802.11ah targets long-range, low-power operation in sub-1 GHz bands; 802.11be (Wi‑Fi 7) aims for higher throughput and new features; 802.11v handles network management and mobility enhancements but does not define RTT/FTM-based ranging. Therefore, the standard that uses Round Trip Time measurements and Fine Timing Measurement to calculate distance to an AP is 802.11mc.