Gnss fine-time assistance over rtt-capable wireless networks
AssigneeQUALCOMM Incorporated
InventorStephen Joseph BEAUREGARD
Life of this patent
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Abstract
Systems and methods of providing fine-time assistance (FTA) for a mobile device are described herein. A GNSS time is received from a GNSS satellite at a GNSS receiver. The GNSS time is then transferred to an access point (AP) over a wired network. The AP is coupled to the mobile device over a wireless local area network (WLAN). A round trip time (RTT) between the AP and the mobile device over the WLAN is determined, for example by exchanging one or more communications between the mobile device and the AP over the wireless local area network (WLAN). The GNSS time is then transferred from the AP to the mobile device over the WLAN. A FTA based GNSS time is calculated at the mobile device based on the GNSS time received from the AP and the RTT.
Claims40
A method of providing fine-time assistance (FTA) for a mobile device, the method comprising:
- receiving a first GNSS time at an access point (AP) over a wired network from a first GNSS receiver;
- determining a round trip time (RTT) between the AP and the mobile device over a wireless local area network (WLAN);
- and
- transmitting the first GNSS time from the AP to the mobile device over the WLAN for calculating a FTA based GNSS time at the mobile device based on the first GNSS time from the AP and the RTT.
An apparatus for fine-time assistance (FTA) comprising:
- a receiver configured to receive a GNSS time over a wired network from a GNSS receiver;
- logic configured to determine a round trip time (RTT) from an access point (AP) to a mobile device over a wireless local area network (WLAN);
- and
- a transmitter configured to transmit the GNSS time to the mobile device over the WLAN to calculate a FTA based GNSS time at the mobile device based on the GNSS time and the RTT.
A system comprising:
- means for receiving a GNSS time over a wired network from a GNSS receiver;
- means for determining a round trip time (RTT) to a mobile device over a wireless local area network (WLAN);
- and
- means for transmitting over the WLAN the GNSS time to the mobile device for calculating a fine-time assistance (FTA) based GNSS time at the mobile device based on the transmitted GNSS time and the RTT.
A non-transitory computer-readable storage medium comprising code, which, when executed by a processor, causes the processor to perform operations for providing fine-time assistance (FTA) for a mobile device, the non-transitory computer-readable storage medium comprising:
- code for receiving a GNSS time over a wired network from a GNSS receiver;
- code for determining a round trip time (RTT) to the mobile device over a wireless local area network (WLAN);
- and
- code for transmitting over the WLAN the GNSS time to the mobile device for calculating a FTA based GNSS time at the mobile device based on the transmitted GNSS time and the RTT.
A method of receiving fine-time assistance (FTA) at a mobile device, the method comprising:
- determining a round trip time (RTT) between the mobile device and an access point (AP) over a wireless local area network (WLAN);
- receiving a GNSS time from the AP over the WLAN;
- and
- calculating a FTA based GNSS time at the mobile device based on the GNSS time from the AP and the RTT.
An apparatus for fine-time assistance (FTA) comprising:
- logic configured to determine a round trip time (RTT) between a mobile device and an access point (AP) over a wireless local area network (WLAN);
- a receiver configured to receive a GNSS time from the AP over the WLAN;
- and
- logic configured to calculate a FTA based GNSS time at the mobile device based on the GNSS time from the AP and the RTT.
A system comprising:
- means for determining a round trip time (RTT) between a mobile device and an access point (AP) over a wireless local area network (WLAN);
- means for receiving a GNSS time from the AP over the WLAN;
- and
- means for calculating a fine-time assistance (FTA) based GNSS time based on the GNSS time from the AP and the RTT.
A non-transitory computer-readable storage medium comprising code, which, when executed by a processor, causes the processor to perform operations for providing fine-time assistance for a mobile device, the non-transitory computer-readable storage medium comprising:
- code for determining a round trip time (RTT) between the mobile device and an access point (AP) over a wireless local area network (WLAN);
- code for receiving a GNSS time from the AP over the WLAN;
- and
- code for calculating a fine-time assistance (FTA) based GNSS time based on the GNSS time from the AP and the RTT.
Dependencies are inferred from the claim text.