US 10,757,207 B1Granted

Presence detection

AssigneeAmazon Technologies, Inc.

InventorNikhil Avinash Kharwandikar

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Abstract

Techniques for amalgamating various types of signals (including ad hoc and regular-interval signals) to determine presence and/or absence of individuals are described. A signal may be assigned a time period with respect to which the signal may be relied on for purposes of presence or vacancy calculations. The time period may vary alternatively be assigned based on when another signal of the same type will be received. A system may receive a user input requesting whether an individual is present near a device or in a location. In response, the system may identify signals that were received and associated with the device or location. The system may determine, for each signal, a weight that the signal should be applied with in presence calculations. The system may calculate a presence or absence confidence based on each signal's time period of usefulness and weight.

Claims16

Dependent claims

A method, comprising:

during a first time period:
receiving, from a first device, a first signal representing presence of a human in an environment of the first device, the first signal corresponding to a first signal type received at regular intervals;
receiving, from the first device, a second signal representing presence of a human in the environment, the second signal corresponding to a second signal type based on user interaction with the first device;
and
storing an association between the first signal, the second signal, and a device identifier representing the first device;
during a second time period after the first time period:
receiving, from a second device, a request for whether a human is in the environment;
after receiving the request, identifying, based at least in part on the association, first stored presence information based at least in part on the first signal and second stored presence information based at least in part on the second signal;
generating a presence confidence value based at least in part on the first stored presence information and the second stored presence information;
and
based at least in part on the presence confidence value, sending, to the second device, first data representing whether a human is in the environment.

8 more elements

A method, comprising:

receiving, from a first device, a request for presence information associated with a second device;
identifying first stored presence information associated with the second device, the first stored presence information corresponding to a first signal type received at regular intervals;
identifying second stored presence information corresponding to a second signal type based on user interaction with the second device;
generating a presence confidence value based at least in part on the first stored presence information and second stored presence information;
and
sending, to the first device, first data representing the presence confidence value.

3 more elements

A system, comprising:

at least one processor;
and
at least one memory comprising instructions that, when executed by the at least one processor, cause the system to:
receive, from a first device, a request for presence information associated with a second device;
identify first stored presence information associated with the second device, the first stored presence information corresponding to a first signal type received at regular intervals;
identify second stored presence information corresponding to a second signal type based on user interaction with the second device;
generate a presence confidence value based at least in part on the first stored presence information and second stored presence information;
and
send, to the first device, first data representing the presence confidence value.

6 more elements

Dependencies are inferred from the claim text.