Ieee 802.11 enhancements for high efficiency positioning

A first wireless device configured to perform a ranging operation with a second wireless device, the first wireless device comprising:

• one or more transceivers to exchange signals with at least the second wireless device;
• one or more processors;
• and
• a memory storing instructions that, when executed by the one or more processors, cause the first wireless device to:
• send, to the second wireless device, a data frame including a request for the second wireless device to report its actual Short lnterframe Space (SIFS) duration to the first wireless device;
• determine a time of departure (TOD) of the data frame;
• receive, from the second wireless device, a response frame including SIFS information indicative of the actual SIFS duration of the second wireless device;
• determine a time of arrival (TOA) of the response frame;
• and
• determine a round trip time (RTT) of the data frame and the response frame using the TOD of the data frame, the TOA of the response frame, and the actual SIFS duration of the second wireless device.

A first wireless device configured to perform a ranging operation with a second wireless device, the first wireless device comprising:

• means for sending, to the second wireless device, a data frame including a request for the second wireless device to report its actual Short lnterframe Space (SIFS) duration to the first wireless device;
• means for determining a time of departure (TOD) of the data frame;
• means for receiving, from the second wireless device, a response frame including SIFS information indicative of the actual SIFS duration of the second wireless device;
• means for determining a time of arrival (TOA) of the response frame;
• and
• means for determining a round trip time (RTT) of the data frame and the response frame using the TOD of the data frame, the TOA of the response frame, and the actual SIFS duration of the second wireless device.

A non-transitory computer-readable storage medium storing one or more programs containing instructions that, when executed by one or more processors of a first wireless device, cause the first wireless device to perform operations comprising:

• sending, to a second wireless device, a data frame including a request for the second wireless device to report its actual Short lnterframe Space (SIFS) duration to the first wireless device;
• determining a time of departure (TOD) of the data frame;
• receiving, from the second wireless device, a response frame including SIFS information indicative of the actual SIFS duration of the second wireless device;
• determining a time of arrival (TOA) of the response frame;
• and
• determining a round trip time (RTT) of the data frame and the response frame using the TOD of the data frame, the TOA of the response frame, and the actual SIFS duration of the second wireless device.