PROXIMITY SENSING METHOD USING LOOPBACK MECHANISM AND WIRELESS COMMUNICATIONS DEVICE THEREOF
First Claim
1. A proximity sensing method employed by a wireless communications device, comprising:
- performing a first predetermined operation to detect presence of at least a transponder in the proximity of the wireless communications device;
when the presence of a transponder in the proximity of the wireless communications device is not detected by the first predetermined operation, performing a second predetermined operation to obtain a first characteristic value and after a period of time, performing the second predetermined operation to obtain a second characteristic value sequentially;
checking if the first characteristic value and the second characteristic value satisfy a predetermined criterion; and
when the predetermined criterion is satisfied, performing the first predetermined operation again to check the presence of the transponder in the proximity of the wireless communications device.
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Accused Products
Abstract
A proximity sensing method employed by a wireless communications device includes the steps of: performing a first predetermined operation to detect a presence of at least a transponder in the proximity of the wireless communications device; when the presence of a transponder in the proximity of the wireless communications device is not detected by the first predetermined operation, performing a second predetermined operation to obtain a first characteristic value and after a period of time, performing the second predetermined operation to obtain a second characteristic value sequentially; checking if the first characteristic value and the second characteristic value satisfy a predetermined criteria; and when the predetermined criterion is satisfied, performing the first predetermined operation again to check the presence of the transponder in the proximity of the wireless communications device.
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Citations
18 Claims
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1. A proximity sensing method employed by a wireless communications device, comprising:
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performing a first predetermined operation to detect presence of at least a transponder in the proximity of the wireless communications device; when the presence of a transponder in the proximity of the wireless communications device is not detected by the first predetermined operation, performing a second predetermined operation to obtain a first characteristic value and after a period of time, performing the second predetermined operation to obtain a second characteristic value sequentially; checking if the first characteristic value and the second characteristic value satisfy a predetermined criterion; and when the predetermined criterion is satisfied, performing the first predetermined operation again to check the presence of the transponder in the proximity of the wireless communications device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless communications device having proximity sensing capability, comprising:
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a first circuit, for performing a first predetermined operation to detect a presence of at least a transponder in the proximity of the wireless communications device, and when the presence of a transponder in the proximity of the wireless communications device is not detected by the first predetermined operation, performing a second predetermined operation to obtain a first characteristic value and after a period of time, performing the second predetermined operation to obtain a second characteristic value sequentially; and a second circuit, for checking if the first characteristic value and the second characteristic value satisfy a predetermined criteria; wherein when the predetermined criterion is satisfied, the first circuit performs the first predetermined operation again to check the presence of the transponder in the proximity of the wireless communications device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification