Method and apparatus for performing channel assessment in a wireless communication system
First Claim
1. A method of assessing channels in a wireless communication system comprising:
- obtaining channel metrics for each of a plurality of channels in the wireless communication system, wherein the channel metrics include information representative of interference signals in the plurality of channels;
filtering the channel metrics to remove metrics associated with frequency hopped interference to provide filtered channel metrics representative of frequency static interference;
determining a shape of the frequency static interference based on the filtered channel metrics by(i) dividing the plurality of channels into a plurality of channel blocks, each channel block comprising at least two adjacent channels; and
(ii) for each of the plurality of channel blocks, combining the filtered channel metrics of the at least two adjacent channels comprised in the channel block, thereby providing a combined metric for each of the plurality of channel blocks; and
classifying each of the plurality of channels based on the combined metrics, thereby identifying usable and unusable channels.
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Abstract
A system and method for classifying channels in a frequency hopping wireless communication system is provided. A data collection engine operates to obtain channel metrics indicating the level of interference for each channel used by the wireless communication system. A data analysis engine operates to provide a channel map for adaptive frequency hopping (AFH) and/or a channel map for channel avoidance. More specifically, the data analysis engine first operates to filter the channel metrics to remove channel metrics indicative of frequency hopping interference. Next, the channels are divided into a number of channel blocks each including at least two adjacent channels. For each channel block, the channel metrics of the channels within the channel block are combined to provide a metric sum. The data analysis engine then operates to classify each channel as usable or unusable based on the metric sums for each of the channel blocks.
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Citations
51 Claims
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1. A method of assessing channels in a wireless communication system comprising:
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obtaining channel metrics for each of a plurality of channels in the wireless communication system, wherein the channel metrics include information representative of interference signals in the plurality of channels; filtering the channel metrics to remove metrics associated with frequency hopped interference to provide filtered channel metrics representative of frequency static interference; determining a shape of the frequency static interference based on the filtered channel metrics by (i) dividing the plurality of channels into a plurality of channel blocks, each channel block comprising at least two adjacent channels; and (ii) for each of the plurality of channel blocks, combining the filtered channel metrics of the at least two adjacent channels comprised in the channel block, thereby providing a combined metric for each of the plurality of channel blocks; and classifying each of the plurality of channels based on the combined metrics, thereby identifying usable and unusable channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless communication system comprising:
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a data collection engine that obtains channel metrics for each of a plurality of channels in the wireless communication system, wherein the channel metrics include information representative of interference signals in the plurality of channels; and a data analysis engine that; filters the channel metrics to remove metrics associated with frequency hopped interference to provide filtered channel metrics representative of frequency static interference; divides the plurality of channels into a plurality of channel blocks, each channel block comprising at least two adjacent channels; for each of the plurality of channel blocks, combines the filtered channel metrics of the at least two adjacent channels comprised in the channel block to provide a combined metric for each of the plurality of channel blocks; and classifies each of the plurality of channels based on the combined metrics, thereby identifying usable and unusable channels. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of assessing channels in a wireless communication system, the method comprising:
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obtaining channel metrics for each of a plurality of channels in the wireless communication system, wherein the channel metrics include information representative of interference signals in the plurality of channels; determining whether to set a hangover timer to a predetermined hangover value for each of the plurality of channels based on at least one of the channel metrics for the plurality of channels;
the determining act comprises filtering the channel metrics to remove metrics associated with frequency hopped interference to provide filtered channel metrics representative of frequency static interference by comparing, for each channel, a number of bad channel metrics of the channel to a threshold; andclassifying each of the plurality of channels based on the hangover timer for each of the plurality of channels, thereby identifying usable and unusable channels. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. A system for assessing channels in a wireless communication environment, the system comprising:
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a data collection engine configured to obtains channel metrics for each of a plurality of channels in the wireless communication system, wherein the channel metrics include information representative of interference signals in the plurality of channels; and a data analysis engine configured to; determine whether to set a hangover timer to a predetermined hangover value for each of the plurality of channels based on at least one of the channel metrics for the plurality of channels;
the determining comprising filtering the channel metrics to remove metrics associated with frequency hopped interference to provide filtered channel metrics representative of frequency static interference by comparing, for each channel, a number of bad channel metrics of the channel to a threshold; andclassify each of the plurality of channels based on the hangover timer for each of the plurality of channels, thereby identifying usable and unusable channels. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
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50. A system for assessing channels in a wireless communication system comprising:
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means for obtaining channel metrics for each of a plurality of channels in the wireless communication system, wherein the channel metrics include information representative of interference signals in the plurality of channels; means for determining whether to set a hangover timer to a predetermined hangover value for each of the plurality of channels based on at least one of the channel metrics for the plurality of channels;
the determining act comprises filtering the channel metrics to remove metrics associated with frequency hopped interference to provide filtered channel metrics representative of frequency static interference by comparing, for each channel, a number of bad channel metrics of the channel to a threshold; andmeans for classifying each of the plurality of channels based on the hangover timer for each of the plurality of channels, thereby identifying usable and unusable channels.
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51. A computer-readable medium having instructions stored thereon, the instructions, when executed by a processor, for causing the processor to execute the steps of:
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obtaining channel metrics for each of a plurality of channels in the wireless communication system, wherein the channel metrics include information representative of interference signals in the plurality of channels; determining whether to set a hangover timer to a predetermined hangover value for each of the plurality of channels based on at least one of the channel metrics for the plurality of channels;
the determining act comprises filtering the channel metrics to remove metrics associated with frequency hopped interference to provide filtered channel metrics representative of frequency static interference by comparing, for each channel, a number of bad channel metrics of the channel to a threshold; andclassifying each of the plurality of channels based on the hangover timer for each of the plurality of channels, thereby identifying usable and unusable channels.
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Specification