Bluetooth scan modes
First Claim
1. A method comprising:
- initiating a scan mode in a Bluetooth slave device, the scan mode being one other than a full receive mode;
receiving a signal over one or more Bluetooth frequencies;
ascertaining whether an energy pattern corresponding to a Bluetooth master device is detected within the received signal, the receiving and ascertaining performed when a medium access control component (MAC) of the Bluetooth slave device is in an idle state; and
if the energy pattern corresponding to a Bluetooth master device is detected, entering the full receive mode.
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Accused Products
Abstract
Different scan modes are provided for Bluetooth devices. In at least some embodiments, a narrowband scanning mode looks for signal energy on individual transmission frequencies at a time. By looking for signal energy rather than decoding transmitted packets, at least some of the components in a Bluetooth device can remain in an idle or rest state. A midband scanning mode looks for signal energy across multiple different frequencies at a time. Again, by looking for signal energy across multiple different frequencies rather than decoding transmitted packets, at least some of the components in a Bluetooth device can remain in an idle or rest state. A wideband scanning mode looks for signal energies across all relevant frequencies at a time. At least some embodiments enable a Bluetooth device to switch between scanning modes.
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Citations
20 Claims
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1. A method comprising:
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initiating a scan mode in a Bluetooth slave device, the scan mode being one other than a full receive mode; receiving a signal over one or more Bluetooth frequencies; ascertaining whether an energy pattern corresponding to a Bluetooth master device is detected within the received signal, the receiving and ascertaining performed when a medium access control component (MAC) of the Bluetooth slave device is in an idle state; and if the energy pattern corresponding to a Bluetooth master device is detected, entering the full receive mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A Bluetooth device comprising circuitry configured to:
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initiate a scan mode of the Bluetooth device, the scan mode being one other than a full receive mode; receive, while the Bluetooth device is in the scan mode, a signal over one or more Bluetooth frequencies; ascertain whether an energy pattern corresponding to a Bluetooth master device is detected within the received signal, the receiving and ascertaining performed when a medium access control component (MAC) of the Bluetooth device is in an idle state; and if the energy pattern corresponding to the Bluetooth master device is detected, enter the full receive mode. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method comprising:
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initiating a scan mode in a Bluetooth slave device, the scan mode not a full receive mode; receiving a signal over one or more Bluetooth frequencies; ascertaining whether an energy pattern of the received signal exceeds a first threshold indicating a presence of a Bluetooth master device or a second threshold indicating noise in one or more of the Bluetooth frequencies, the receiving and ascertaining performed when a medium access control component (MAC) of the Bluetooth slave device is in an idle state; and if the energy pattern exceeds the first threshold, entering the full receive mode;
orif the energy pattern exceeds the second threshold, entering another scan mode, the other scan mode not the full receive mode. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification