Abstract:
Techniques for establishing a fine timing measurement (FTM) session of infinite duration between wireless devices is provided. A method according to these techniques includes generating, at a first wireless device, a first request to establish an FTM session with a second wireless device using an FTM protocol, the first request comprising one or more session parameters having a value indicative that the first wireless device is requesting the FTM session have an infinite session duration, receiving one or more FTM measurement messages from the second wireless device, and sending a second request to the second wireless device requesting that the FTM session be terminated.
Abstract:
Disclosed are processes, devices and systems for exchanging messages between devices in support of measuring ranges between devices. In one particular implementation, a first wireless transceiver device may transmit one or more fine timing measurement (FTM) messages to a second wireless transceiver device, and receive a message acknowledging receipt of at least one of the one or more FTM messages. The first wireless transceiver device may authenticate the received message as being transmitted from the second wireless transceiver device.
Abstract:
Disclosed are techniques for performing ranging operations between an access point and an unassociated mobile device. The techniques can include receiving, at an access point, a broadcast probe request from a mobile device unassociated with the access point. In response to receiving the probe request, it can be determined that the mobile device is capable of performing ranging operations including inspecting the received broadcast probe request. The access point can send a ranging request to the mobile device.
Abstract:
Disclosed are methods, systems and devices for obtaining a range between devices based, at least in part, on an exchange of wireless messages. For example, wireless devices may obtain measurements of range based, at least in part, on an exchange fine timing measurement (FTM) messages. In one implementation, an initial FTM request message may be transmitted from a first wireless transceiver device to a second wireless transceiver device comprising one or more parameters indicative of a request for transmission of FTM messages in a particular format.
Abstract:
Techniques for estimating a position of an observing station are disclosed based on capturing, at the observing station, a first and a second FTM message exchanged between a first messaging station and a second messaging station. At the observing station, a first time of arrival of the first FTM message and a second time of arrival of the second FTM message may be determined. Based on contents of one or more FTM messages, a first transmission-related time associated with the first FTM message and a second transmission-related time associated with the second FTM message may be obtained. The position of the observing station may be estimated based on (1) a position of the first messaging station, (2) a position of the second messaging station, (3) the first time of arrival, (4) the second time of arrival, (5) the first transmission-related time, and (6) the second transmission-related time.
Abstract:
Techniques for providing a secure Fine Timing Measurement (FTM) exchange between two wireless transceivers are disclosed. An example of a method according to the disclosure include transmitting a protected FTM range request message with a Dialog Token of a FTM frame, receiving a protected FTM range report message from a station, wherein the protected FTM range report message includes FTM information, and authenticating the station based at least in part on the FTM information included in the protected FTM range report message.
Abstract:
Disclosed are methods, systems and devices for obtaining a range between devices based, at least in part, on an exchange of wireless messages. For example, wireless devices may obtain measurements of range based, at least in part, on an exchange fine timing measurement (FTM) messages. In one implementation, a message transmitted from a first wireless transceiver device to a second wireless transceiver device may comprise one or more parameters indicative of a range between the first wireless transceiver device and the second wireless transceiver device, or a range between the first wireless transceiver device and a third wireless transceiver device other than the second wireless transceiver device.
Abstract:
Techniques for establishing a fine timing measurement (FTM) session of infinite duration between wireless devices is provided. A method according to these techniques includes generating, at a first wireless device, a first request to establish an FTM session with a second wireless device using an FTM protocol, the first request comprising one or more session parameters having a value indicative that the first wireless device is requesting the FTM session have an infinite session duration, receiving one or more FTM measurement messages from the second wireless device, and sending a second request to the second wireless device requesting that the FTM session be terminated.
Abstract:
A method at a responding wireless device, STA, a responding STA and a non-transitory storage medium for storing instructions to perform said method, the method comprising: receiving (602) a fine timing measurement, FTM, request message from an initiating STA; and transmitting (604) at least a subsequent FTM message to the initiating STA in response to the FTM request message, the subsequent FTM message comprising at least one field indicating a time of transmission of a previous FTM message and a time of receipt of an acknowledgement message transmitted in response to receipt of the previous FTM, the at least one field comprising a common portion indicative of most significant portions of the time of transmission of the previous FTM message and the time of receipt of the acknowledgement message, a first fractional portion indicative of the time of transmission of the previous FTM message and a second fraction portion indicative of the time of receipt of the acknowledgement message.