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Dynamic channel assignment for WLAN deployments with IEEE 802.11ac access points

  • US 9,060,352 B2
  • Filed: 08/14/2012
  • Issued: 06/16/2015
  • Est. Priority Date: 08/14/2012
  • Status: Active Grant
First Claim
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1. A method comprising:

  • computing metrics for at least one set of radio frequency (RF) channels, wherein the set of RF channels comprises at least two RF channels in a frequency band that are available for use by a wireless network for a wider bandwidth mode of operation that combines bandwidth of two or more RF channels, wherein the metrics are based on activity from devices in the set of RF channels;

    determining alignment of individual primary and secondary RF channels in the set of RF channels for operation of at least first and second wireless networks, at least one of which operates in a wider bandwidth mode, wherein a primary channel is a set of one or more RF channels that is a smaller denomination of RF channels used by a wireless network when it is not operating in a wider bandwidth mode and a secondary channel is one or more RF channels used in conjunction with a primary channel when a wireless network is operating in a wider bandwidth mode;

    applying to the metrics a bias for each RF channel that is a member of the set of RF channels for a primary channel depending on alignment of primary and secondary channels of the respective first wireless network and second wireless network to produce adjusted metrics, wherein the bias for each RF channel is computed from a receive signal strength of the first wireless network relative to a clear channel access threshold of a secondary channel of the second wireless network based on a piecewise linear transfer function; and

    assigning RF channels to a primary channel and at least two secondary channels for the first wireless network or the second wireless network based on the adjusted metrics.

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