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Derivation of an identifier encoded in a visible light communication signal

A technology for visible light communication and identifiers, applied in the field of derivation of identifiers encoded in visible light communication signals, which can solve problems such as not receiving light sources

Active Publication Date: 2017-03-22
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the cancellation of a portion of the transmitted data may be inherent in the receiver due to the rolling shutter in the receiver
As a result, the receiver may not receive all the information sent by the light source

Method used

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  • Derivation of an identifier encoded in a visible light communication signal
  • Derivation of an identifier encoded in a visible light communication signal
  • Derivation of an identifier encoded in a visible light communication signal

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Embodiment Construction

[0030] This application describes data sending and receiving using VLC. In some examples, the described methods, systems, and devices can use rateless VLC, which is a lighting device that can repeatedly (and in some cases, constantly) send a piece of information (e.g., an identifier) ​​and the A VLC-compatible device in the vicinity of the lighting device can receive and decode the transmission of the identifier until the portion of the identifier captured is sufficient to reconstruct or deduce the communication method of the identifier. In some cases, the full identifier may be captured. In other cases, only a portion of the identifier may be captured. Each repetition of this identifier may convey the same information. In practice, the symbols of the identifier may be lost (erased) due to temporary breaks in the VLC link, eg due to physical obstacles, or due to an increase in the distance between the lighting device and the receiver of the VLC compatible device. Due to thi...

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PUM

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Abstract

Methods, systems, and devices are described for deriving an identifier encoded in a visible light communication (VLC) signal. One method includes capturing a first part of the VLC signal; extracting, from the first part of the VLC signal, a first pattern of bits representing at least a portion of the identifier encoded in the VLC signal; comparing the first pattern of bits to different portions of a plurality of identifiers; and identifying, based at least in part on the comparing, a subset of the plurality of identifiers as candidate matches to the identifier encoded in the VLC signal.

Description

[0001] cross reference [0002] This patent application claims priority to U.S. Patent Application No. 14 / 339,170, filed July 23, 2014, by Jovicic et al., entitled "Derivation of an Identifier Encoded in a Visible Light Communication Signal," which has been assigned to the assignee of this application. Background technique [0003] The following relates generally to visible light communication and, more specifically, to the derivation of identifiers (eg, identifiers of lighting devices) encoded in visible light communication signals. Visible light communication (VLC) involves the transmission of information by light intensity modulation of a light source, eg, of one or more light emitting diodes (LEDs). In general, visible light communication works by sending a modulated visible light signal from a light source such as an LED or a laser diode (LD), and deploying a signal between a photodetector (PD) or a PD array (e.g., complementary metal oxide semiconductor (CMOS) ) by rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116
CPCH04B10/116
Inventor A·约维契奇M·P·佩鲁马尔T·J·理查森厉隽怿
Owner QUALCOMM INC