Determining time calibration value for user equipment

A technology for time calibration and user equipment, applied in positioning, location information-based services, satellite radio beacon positioning systems, etc., can solve problems such as high cost and slow down manufacturing process

Active Publication Date: 2019-01-04
QUALCOMM INC
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AI Technical Summary

Problems solved by technology

Manually estimating time calibration values ​​for each UE at the manufacturer is costly and can also slow down the manufacturing process

Method used

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  • Determining time calibration value for user equipment
  • Determining time calibration value for user equipment
  • Determining time calibration value for user equipment

Examples

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example

[0098] o Example #2: In a point-of-sale (POS) transaction, UE 100 can connect to a POS terminal via a local short-range connection, where the POS terminal location is precisely known;

[0099] o Example #3: The UE 100 uses the camera to scan a nearby QR code. A QR code may map directly to an associated location, or may be some type of device identifier that can be used to look up an associated location; and / or

[0100] • The UE 100 determines its position based on a Pedestrian Dead Reckoning (PDR) system in an indoor environment.

[0101] UE 100 then estimates its time alignment value 1015A (e.g., similar to Figure 6 615). In an example, the estimate of 1015A can be calculated based on Equation 5 as shown below:

[0102] Time calibration value = TOAmeas-(||UEloc-antennaloc||+FLC)

[0103] Equation 5

[0104] where TOAmeas represents the mean value of TOA measured at 1005A, UEloc represents the non-STPS and non-GNSS UE position estimate from 1010A, antennaloc represents t...

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Abstract

In an embodiment, a given entity obtains a location of at least one terrestrial transmit station of a Synchronized Wireless Transmission Network (SWTN), transmit station calibration information associated with the at least one terrestrial transmit station and a location of a user equipment (UE) that is in wireless communication range with the at least one terrestrial transmit station. The given entity estimates the time calibration value for the UE based on the obtained transmit station location, the determined transmit station calibration information and the determined location of the UE. Inanother embodiment, a server obtains time calibration values that are estimated for each UE in the population of UEs. The server aggregates the estimated time calibration values based on device modeland / or device operation mode, and calculates a representative time calibration value for UEs sharing the device model and / or device operation mode.

Description

technical field [0001] Embodiments relate to determining a time alignment value for a user equipment (UE). Background technique [0002] There is often a need to know the location of a user equipment (UE) such as a cell phone (or mobile device). For example, a location services (LCS) client may need to know the location of the UE in case of an emergency services call or to provide a certain service to the user of the UE, such as navigation assistance or direction finding. The terms "location" and "position" are synonymous and are used interchangeably herein. One method of determining the location of a UE is based on measurements of signal arrival times from multiple antennas. For example, a UE may measure the time difference of received signals from multiple base station antennas. Since the position of the base station antenna is known, the observed time difference can be used to calculate the position of the UE. The UE may utilize the base station almanac (BSA) to perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23G01S5/02
CPCG01S19/23G01S5/021G01S5/0221H04W4/023H04W56/001G01S19/13
Inventor 度朱永莱曼·威·彭更生·张
Owner QUALCOMM INC
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