Method of acquiring a channel in a general frequency reuse system
First Claim
1. In a general frequency reuse data communications system including infrastructure and a subscriber terminal a method of acquiring a channel at the subscriber terminal including the steps of:
- fast scanning a predetermined list of data channels to identify a fast scanned channel;
further scanning, when said fast scanned channel is not identified, said predetermined list of channels repeatedly for a time not exceeding an intermediate scan period to identify an intermediate scanned channel where a channel from said predetermined list of channels is evaluated for a first time period shorter than the intermediate scan period; and
slow scanning, when said intermediate scanned channel is not identified, at least selected channels from said predetermined list of channels to identify a slow scanned channel where a channel from said predetermined list of channels is evaluated for a second time period longer than said first time period.
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Accused Products
Abstract
In a general frequency reuse data communications system including infrastructure 100 and a subscriber terminal 115 a method of acquiring a channel includes: fast scanning 199 a predetermined list of data channels to identify a fast scanned channel; intermediate scanning 200, when the fast scanned channel is not identified, the predetermined list of channels to identify an intermediate scanned channel where a channel from the predetermined list of channels is evaluated for a first time period; and slow scanning 500, when the intermediate scanned channel is not identified, the predetermined list of channels to identify a slow scanned channel where a channel from the predetermined list of channels is evaluated for a second time period.
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Citations
25 Claims
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1. In a general frequency reuse data communications system including infrastructure and a subscriber terminal a method of acquiring a channel at the subscriber terminal including the steps of:
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fast scanning a predetermined list of data channels to identify a fast scanned channel; further scanning, when said fast scanned channel is not identified, said predetermined list of channels repeatedly for a time not exceeding an intermediate scan period to identify an intermediate scanned channel where a channel from said predetermined list of channels is evaluated for a first time period shorter than the intermediate scan period; and slow scanning, when said intermediate scanned channel is not identified, at least selected channels from said predetermined list of channels to identify a slow scanned channel where a channel from said predetermined list of channels is evaluated for a second time period longer than said first time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22)
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19. In a data communications system including infrastructure and a subscriber terminal suitable for operation on multi-frequency reuse and single frequency reuse data systems a method of acquiring an operating channel at the subscriber terminal including the steps of:
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fast scanning a predetermined list of data channels to identify an acceptable channel; scanning, when said acceptable channel is not identified, said predetermined list of channels repeatedly for a time not exceeding an intermediate scan period to identify an intermediate scanned channel where a channel from said predetermined list of channels is evaluated for a first time period shorter than the intermediate scan period; and slow scanning, when said intermediate scanned channel is not identified, said second predetermined list of channels to identify a slow scanned channel where a channel from said predetermined list of channels is evaluated for a second time period longer than said first time period.
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23. In a general frequency reuse data communications system including infrastructure and a subscriber terminal a method of acquiring a channel at the subscriber terminal including the steps of:
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fast scanning a predetermined list of continuously-keyed and intermittently-keyed data channels once to identify a fast scanned channel; further scanning, when said fast scanned channel is not identified, said predetermined list of channels repeatedly for a time not exceeding an intermediate scan period, to identify an intermediate scanned channel where a channel from said predetermined list of channels is evaluated for a first time period shorter than the intermediate scan period; and slow scanning, when said intermediate scanned channel is not identified, intermittently-keyed channels of said predetermined list of channels to identify a slow scanned channel where an intermittently-keyed channel from said predetermined list of channels is evaluated for a second time period, longer than said first time period.
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24. In a general frequency reuse data communications system including infrastructure and a subscriber terminal a method of acquiring a channel at the subscriber terminal including the steps of:
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assigning a weight to each channel in a predetermined list of data channels, using a received signal strength indication (RSSI) corresponding to said each channel and using other channel attributes corresponding to said each channel; ranking said each channel in accordance with said weight to provide a ranked list of channels; fast scanning said predetermined list of channels in rank order to identify a fast scanned channel; further scanning, when said fast scanned channel is not identified, said predetermined list of channels repeatedly to identify an intermediate scanned channel where a channel from said predetermined list of channels is evaluated for a first time period; and slow scanning, when said intermediate scanned channel is not identified, said predetermined list of channels to identify a slow scanned channel where a channel from said predetermined list of channels is evaluated for a second time period, longer than said first time period. - View Dependent Claims (25)
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Specification