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Signalling method of detecting hidden incumbent system in cognitive radio environment and channel fractioning method used to enable the method

  • US 20080014880A1
  • Filed: 02/21/2007
  • Published: 01/17/2008
  • Est. Priority Date: 07/14/2006
  • Status: Active Grant
First Claim
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1. A signaling method which is performed by a cognitive radio (CR) base station in a CR environment, the method comprising:

  • broadcasting an Explicit Outband Signal (EOS) via at least one outband channel according to a predetermined period;

    receiving a sensing report signal with respect to an incumbent system, which utilizes a predetermined channel, from a CR terminal which makes a communication via the outbound channel; and

    switching the outband channel of the CR terminal to an available outband channel.

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