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Carrier sense adaptive transmission (CSAT) in unlicensed spectrum

  • US 9,491,632 B2
  • Filed: 09/15/2014
  • Issued: 11/08/2016
  • Est. Priority Date: 09/24/2013
  • Status: Active Grant
First Claim
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1. A method of Carrier Sense Adaptive Transmission (CSAT) for reducing interference between Radio Access Technologies (RATs), comprising:

  • receiving signals via a resource, wherein a first RAT is used to receive the signals;

    identifying a utilization of the resource that is associated with the first RAT, wherein the identification is based on the received signals;

    setting one or more cycling parameters of a first Time Division Multiplexing (TDM) communication pattern defining activated and deactivated periods of transmission on a first frequency for a second RAT sharing the resource, wherein the setting is based on the identified utilization of the resource;

    setting one or more cycling parameters of a second TDM communication pattern defining activated and deactivated periods of transmission on a second frequency for the second RAT, wherein the setting is based on the identified utilization of the resource, and wherein the first TDM communication pattern and the second TDM communication pattern are staggered in time with respect to an overlap in their activated and deactivated periods; and

    cycling operation of the second RAT between activated and deactivated periods of transmission over the resource on the first and second frequencies in accordance with the first and second TDM communication patterns.

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