System and method for information verification based on channel awareness
First Claim
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1. A client device for communicating with a wireless access point, the client device comprising:
- a data processing module configured to receive at least a portion of a frame transmitted by the access point to an intermediate location within the frame; and
a channel assessment module configured to determine a validity window with respect to the intermediate location when at least one channel quality metric is greater than or equal to a given threshold, wherein data processing module is configured to validate information received within the validity window,wherein the channel assessment module is further configured to determine the validity window by comparing a first duration metric corresponding to a time period between a preamble of the frame and the intermediate location to a coherence time, determining whether a first channel quality metric determined from the preamble exceeds a given threshold, comparing a second duration metric corresponding to a time period between the intermediate location and a verification field to a coherence time and comparing the difference between the first channel quality metric and a second channel quality metric to a channel quality difference threshold.
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Abstract
This disclosure describes techniques for operating a client device to communicate with a wireless access point to validate data within a frame by comparing channel quality metrics and duration metrics to thresholds. Information received within a validity window may be treated as correctly received even if the frame fails a subsequent verification process or if reception of the frame is terminated prior to the end of the frame.
64 Citations
26 Claims
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1. A client device for communicating with a wireless access point, the client device comprising:
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a data processing module configured to receive at least a portion of a frame transmitted by the access point to an intermediate location within the frame; and a channel assessment module configured to determine a validity window with respect to the intermediate location when at least one channel quality metric is greater than or equal to a given threshold, wherein data processing module is configured to validate information received within the validity window, wherein the channel assessment module is further configured to determine the validity window by comparing a first duration metric corresponding to a time period between a preamble of the frame and the intermediate location to a coherence time, determining whether a first channel quality metric determined from the preamble exceeds a given threshold, comparing a second duration metric corresponding to a time period between the intermediate location and a verification field to a coherence time and comparing the difference between the first channel quality metric and a second channel quality metric to a channel quality difference threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for wireless communication with an access point, comprising:
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receiving at least a portion of a frame transmitted by the access point to an intermediate location within the frame with a client device; determining a channel quality metric;
establishing a validity window when the channel quality metric is greater than or equal to a given threshold; andvalidating information from the frame received within the validity window, wherein establishing the validity window comprises comparing a first duration metric corresponding to a time period between a preamble of the frame and the intermediate location to a coherence time, determining whether a channel quality metric determined from the preamble exceeds a given threshold, comparing a second duration metric corresponding to a time period between the intermediate location and a verification field to a coherence time and comparing the difference between the first channel quality metric and a second channel quality metric to a channel quality difference threshold. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification