| CPC H04W 52/285 (2013.01) | 20 Claims |
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1. A wearable device comprising:
a first sensor;
at least one second sensor; and
at least one processor configured to:
control the first sensor to transmit a first signal with a first strength;
identify a position of a first object based on a first response signal to the first signal;
based on the identified position of the first object, control the first sensor to transmit a second signal with a second strength corresponding to a first distance between the wearable device and the first object;
detect, by using the at least one second sensor, a movement of the wearable device, the movement of the wearable device comprising at least one of a position change of the wearable device and a direction change of the wearable device; and
determine whether to adjust the second strength, based on at least one of the movement of the wearable device and the position of the first object.
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