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US-2024031968-A1 · Jan 25, 2024 · US
Reducing impact of clock drift in wireless devices
US9191908B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9191908-B2 |
| Application number | US-201414185660-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 20, 2014 |
| Priority date | Mar 5, 2013 |
| Publication date | Nov 17, 2015 |
| Grant date | Nov 17, 2015 |
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Abstract
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Systems and methods for calculating round trip time (RTT) between two wireless devices with respective clock drifts, while lowering the impact of the clock drifts on the RTT. A first RTT in a first direction is determined between a first wireless device and a second wireless device based on a first set of one or more messages exchanged between the first wireless device and the second wireless device. A second RTT in a second direction is determined between the second wireless device and the first wireless device based on a second set of one or more messages exchanged between the second wireless device and the first wireless device, and an average RTT of the first RTT and the second RTT is computed, wherein the average RTT has a low impact of the clock drifts.
First claim
Opening claim text (preview).
What is claimed is: 1. A method, at a first wireless device, of computing an estimated location of the first wireless device, the method comprising: receiving a first round trip time (RTT) measurement computed based, at least in part, on one or more first values obtained from a first fine time measurement frame transmitted from a second wireless device, the one or more first values being based, at least in part, on a timestamp of a time of receipt of a first acknowledgement frame…
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Classifications
- H04W56/0035Primary
Electricity · mapped topic
- H04W56/003Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9191908B2 cover?
- Systems and methods for calculating round trip time (RTT) between two wireless devices with respective clock drifts, while lowering the impact of the clock drifts on the RTT. A first RTT in a first direction is determined between a first wireless device and a second wireless device based on a first set of one or more messages exchanged between the first wireless device and the second wireless d…
- Who is the assignee on this patent?
- Qualcomm Inc
- What technology area does this patent fall under?
- Primary CPC classification H04W56/0035. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).