Ultrasound based mobile receivers in idle mode
First Claim
1. A method comprising:
- operating an acoustic receiver device in an idle mode using an idle sampling rate for acoustic signals that is less than a full sampling rate, wherein the acoustic receiver device is a mobile platform;
receiving a wake-up signal from an acoustic transmitter device, the wake-up signal being an acoustic signal that is acoustically transmitted by the acoustic transmitter device and having a frequency that is detectable by the acoustic receiver device while in the idle mode, wherein the acoustic transmitter device is separate from the mobile platform; and
operating the acoustic receiver device in a full operational mode including the full sampling rate for acoustic signals in response to the wake-up signal.
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Accused Products
Abstract
An acoustic system, which may be ultrasonic, operates in a power efficient idle mode thereby reducing the power consumption required by high frequency sampling and processing. While in idle mode, an acoustic receiver device operates with an idle sampling rate that is lower than the full sampling rate used during full operational mode, but is capable of receiving a wake-up signal from the associated acoustic transmitter. When the wake-up signal is received, the acoustic receiver switches to full operational mode by increasing the sampling rate and enables full processing. The acoustic system may be used in, e.g., an ultrasonic pointing device, location beacons, in peer-to-peer communications between devices, as well as gesture detection.
18 Citations
24 Claims
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1. A method comprising:
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operating an acoustic receiver device in an idle mode using an idle sampling rate for acoustic signals that is less than a full sampling rate, wherein the acoustic receiver device is a mobile platform; receiving a wake-up signal from an acoustic transmitter device, the wake-up signal being an acoustic signal that is acoustically transmitted by the acoustic transmitter device and having a frequency that is detectable by the acoustic receiver device while in the idle mode, wherein the acoustic transmitter device is separate from the mobile platform; and operating the acoustic receiver device in a full operational mode including the full sampling rate for acoustic signals in response to the wake-up signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A mobile platform comprising:
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an acoustic receiver for receiving acoustic signals transmitted an acoustic transmitter that is separate from the mobile platform; and a processor connected to the acoustic receiver, the processor being configured to cause the acoustic receiver to operate in an idle mode using an idle sampling rate for acoustic signals that is less than a full sampling rate, detect a wake-up signal that is an acoustic signal transmitted by the acoustic transmitter and received by the acoustic receiver while in the idle mode, and to cause the acoustic receiver to operate in a full operational mode including the full sampling rate for acoustic signals in response to the wake-up signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A mobile platform comprising:
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means for operating an acoustic receiver device in an idle mode using an idle sampling rate for acoustic signals that is less than a full sampling rate; means for receiving a wake-up signal from an acoustic transmitter device, the wake-up signal being an acoustic signal that is acoustically transmitted by the acoustic transmitter device and having a frequency that is detectable by the acoustic receiver device while in the idle mode wherein the acoustic transmitter device is separate from the mobile platform; and means for operating the acoustic receiver device in in a full operational mode including the full sampling rate for acoustic signals in response to the wake-up signal. - View Dependent Claims (20, 21, 22)
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23. A non-transitory computer-readable medium including program code stored thereon, comprising:
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program code to operate an acoustic receiver device in an idle mode using an idle sampling rate for acoustic signals that is less than a full sampling rate, wherein the acoustic receiver device is a mobile platform; program code to detect a wake-up signal from an acoustic transmitter device, the wake-up signal being an acoustic signal that is acoustically transmitted by the acoustic transmitter device and having a frequency that is detectable by the acoustic receiver device while in the idle mode, wherein the acoustic transmitter device is separate from the mobile platform; and program code to operate the acoustic receiver device in a full operational mode including the full sampling rate for acoustic signals in response to the wake-up signal. - View Dependent Claims (24)
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Specification