QUALCOMM Incorporated
ROUND TRIP TIME USING ORTHOGONAL FREQUENCY-DIVISION MULTIPLE ACCESS PROCEDURE

Abstract:

Techniques are provided for obtaining round trip timing (RTT) measurements using orthogonal frequency-division multiple access procedures. An example method for determining distances to a plurality of stations includes receiving a respective first measurement frame from each of the plurality of stations, wherein the first measurement frame from each of the plurality of stations is transmitted simultaneously, transmitting a single multi-station block acknowledgment frame to the plurality of stations, receiving a respective second measurement frame from each of the plurality of stations, wherein the second measurement frame from each of the plurality of stations is transmitted simultaneously, and determining a respective distance to each of the plurality of stations based at least in part on the first measurement frame and the second measurement frame from at least some of the plurality of stations.