US 10,382,129 B2 · Transmission of identifiers using visible light communication

Abstract

Methods, systems, and devices are described for transmitting an identifier using visible light communication (VLC) and for generating a plurality of identifiers for transmission using VLC. Input identifying an illumination factor associated with a light source is received. A first set of modulation parameters is modified for transmitting the identifier using VLC. The first set of modulation parameters is modified based on the illumination factor. A signal, in which the identifier is encoded, is applied to the light source. The signal is applied according to the first set of modulation parameters. Another method includes identifying a number of light transmitting devices, generating a plurality of identifiers based on the identified number of light transmitting devices, storing the generated identifiers, determining a plurality of cyclic shifts for each identifier in the plurality of identifiers, and removing identifiers from the plurality of identifiers that match the identified cyclic shifts.

Claims18

Dependent claims

A method for generating a plurality of identifiers for transmission using visible light communication (VLC), comprising:

identifying a number of light transmitting devices;
selecting an identifier length and an alphabet for generating the plurality of identifiers, wherein the alphabet comprises alphabet characters associated with a plurality of symbols, at least two of the symbols having different symbol durations;
generating the plurality of identifiers based at least in part on the number of light transmitting devices, each of the plurality of identifiers comprising a sequence of symbols selected from the plurality of symbols of the alphabet based at least in part on the identifier length;
storing the plurality of identifiers;
determining a plurality of cyclic shifts for each identifier of the plurality of identifiers;
removing identifiers from the plurality of identifiers that match the plurality of cyclic shifts;
and
assigning each of the number of light transmitting devices a unique identifier from among the identifiers that remain in the plurality of identifiers after removing the identifiers that match the plurality of cyclic shifts.

5 more elements

A controller for generating a plurality of identifiers for transmission using visible light communication (VLC), comprising:

means for identifying a number of light transmitting devices;
means for selecting an identifier length and an alphabet for generating the plurality of identifiers, wherein the alphabet comprises alphabet characters associated with a plurality of symbols, at least two of the symbols having different symbol durations;
means for generating the plurality of identifiers based at least in part on the number of light transmitting devices, each of the plurality of identifiers comprising a sequence of symbols selected from the plurality of symbols of the alphabet based at least in part on the identifier length;
means for storing the plurality of identifiers;
means for determining a plurality of cyclic shifts for each identifier of the plurality of identifiers;
means for removing identifiers from the plurality of identifiers that match the plurality of cyclic shifts;
and
means for assigning each of the number of light transmitting devices a unique identifier from among the identifiers that remain in the plurality of identifiers after removing the identifiers that match the plurality of cyclic shifts.

5 more elements

A controller for generating a plurality of identifiers for transmission using visible light communication (VLC), comprising:

a processor configured to:
identify a number of light transmitting devices;
select an identifier length and an alphabet for generating the plurality of identifiers, wherein the alphabet comprises alphabet characters associated with a plurality of symbols, at least two of the symbols having different symbol durations;
and
generate the plurality of identifiers based at least in part on the number of light transmitting devices, each of the plurality of identifiers comprising a sequence of symbols selected from the plurality of symbols of the alphabet based at least in part on the identifier length;
memory configured to store the plurality of identifiers;
wherein the processor is further configured to:
determine a plurality of cyclic shifts for each identifier of the plurality of identifiers;
remove identifiers from the plurality of identifiers that match the plurality of cyclic shifts;
and
assign each of the number of light transmitting devices a unique identifier from among the identifiers that remain in the plurality of identifiers after removing the identifiers that match the plurality of cyclic shifts;
and
a transmitter configured to transmit information based at least in part on the plurality of identifiers.

10 more elements

Dependencies are inferred from the claim text.

Transmission of identifiers using visible light communication

Life of this patent

Transmission of identifiers using visible light communication

Life of this patent

Abstract

Claims18