Synchronized low-energy detection technique
First Claim
1. An electronic device, comprising:
- an interface circuit configured to;
periodically scan for beacons in a high power-consumption mode using a plurality of high-power scan windows;
receive a first beacon during a first scan window of the plurality of high-power scan windows;
establish a connection based at least in part on the received first beacon; and
subsequent to establishing the connection, periodically scan for beacons in a low power-consumption mode using a plurality of low-power scan windows.
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Accused Products
Abstract
In order to reduce the power consumption after a transmitting electronic device in a wireless network has been detected, a receiving electronic device calculates transmit times of subsequent beacons from the transmitting electronic device based on a clock drift of the transmitting electronic device and the beacon period. Then, the receiving electronic device receives the subsequent beacon by opening scan windows that encompass the calculated transmit times. However, because the transmit times are more predictable after the transmitting electronic device has been detected (and the clock drift of the transmitting electronic device is known to the receiving electronic device), the receiving electronic device can reduce the width of the scan windows. In addition, the transmitting electronic device can further reduce the power consumption by increasing the beacon period.
43 Citations
20 Claims
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1. An electronic device, comprising:
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an interface circuit configured to; periodically scan for beacons in a high power-consumption mode using a plurality of high-power scan windows; receive a first beacon during a first scan window of the plurality of high-power scan windows; establish a connection based at least in part on the received first beacon; and subsequent to establishing the connection, periodically scan for beacons in a low power-consumption mode using a plurality of low-power scan windows. - View Dependent Claims (2, 3, 4, 5, 6, 20)
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7. A method comprising:
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receiving, using an interface circuit of an electronic device operating in a high power-consumption mode, a first beacon; establishing a connection based at least in part on the received first beacon; after establishing the connection, periodically scanning for beacons in a low power-consumption mode using a plurality of low-power scan windows and receiving, using the interface circuit operating in the low power-consumption mode, a second beacon; and prior to receiving the first beacon, periodically scanning for beacons using a plurality of high-power scan windows. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An electronic device, comprising:
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an interface circuit configured to; periodically transmit a first set of beacons while operating in a high power-consumption mode; establish a connection based at least in part on a beacon in the first set of beacons transmitted while operating in the high power-consumption mode; subsequent to establishing the connection, periodically transmit a second set of beacons while operating in a low power-consumption mode. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification