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US 2015/0319631 A1Published application
Methods and systems for enhanced round trip time (rtt) exchange
AssigneeQUALCOMM Incorporated
InventorsCarlos Aldana, Subash Marri Sridhar
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Abstract
Disclosed are methods and systems for obtaining measurements of a range between devices based on a Round Trip Time (RTT) for an exchange messages. In particular, described are techniques for transmitting messages between or among devices to share computed parameters indicative of ranges between devices.
Claims29
At an initiating wireless station (STA), a method for obtaining fine timing measurements comprising:
- transmitting a fine timing measurement (FTM) request message to a responding STA, the FTM request message indicating a capability of the initiating STA to share ranging parameters with the responding STA;
- receiving one or more FTM messages from the responding STA in response to the FTM request message;
- computing one or more parameters indicative of a range between the initiating STA and the responding STA based, at least in part, on the one or more FTM messages;
- and
- transmitting one or more FTM range report messages containing the one or more parameters to the responding STA.
2 more elements
An initiating wireless station (STA), comprising:
- a transceiver to transmit messages to and receive messages from a wireless communication network;
- and
- one or more processors configured to:
- initiate transmission of a fine timing measurement (FTM) request message through the transceiver to a responding STA, the FTM request message indicating a capability of the initiating STA to share ranging parameters with the responding STA;
- obtain one or more FTM messages received at the transceiver from the responding STA in response to the FTM request message;
- compute one or more parameters indicative of a range between the initiating STA and the responding STA based, at least in part, on the one or more FTM messages;
- and
- initiate transmission of one or more FTM range report messages containing the one or more parameters through the transceiver to the responding STA.
5 more elements
At a responding wireless station (STA), a method for obtaining fine timing measurements comprising:
- receiving a fine timing measurement (FTM) request message from an initiating STA, the FTM request message indicating a capability of the initiating STA to share ranging measurements with the responding STA;
- transmitting one or more FTM messages to the initiating STA in response to the FTM request message;
- and
- receiving one or more FTM range report messages from the initiating STA containing one or more parameters indicative of a range, the one or more parameters being computed at the initiating STA based, at least in part, on the transmitted one or more FTM messages.
1 more element
A responding wireless station (STA), comprising:
- a transceiver to transmit messages to and receive messages from a wireless communication network;
- and
- one or more processors configured to:
- obtain a fine timing measurement (FTM) request message received at the transceiver from an initiating STA, the FTM request message indicating a capability of the initiating STA to share ranging measurements with the responding STA;
- initiate transmission of one or more FTM messages through the transceiver to the initiating STA in response to the FTM request message;
- and
- obtain one or more FTM range report messages received at the transceiver from the initiating STA containing one or more parameters indicative of a range, the one or more parameters being computed at the initiating STA based, at least in part, on the transmitted one or more FTM messages.
4 more elements
Dependencies are inferred from the claim text.