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Frequency hopping spread spectrum communication system

  • US 20050018631A1
  • Filed: 12/27/2002
  • Published: 01/27/2005
  • Est. Priority Date: 12/31/2001
  • Status: Abandoned Application
First Claim
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1. A method of operating a frequency hopping spread spectrum comprising a central node and dependent nodes which communicate over a time division duplexed, frequency hopping channel, alternate time-wise frequency/time slots being allocated for central node and dependent node transmission, wherein a first of said dependent nodes is not permitted to transmit in a frequency/time slot which immediately succeeds, time-wise, a frequency/time slot in which the central node transmitted to another of said dependent nodes, comprising the steps of:

  • the central node maintaining a black-list of worse-performing frequency bands in the channel, and transmitting a dummy packet in a frequency/time slot immediately preceding, time-wise, a frequency/time slot allocated for possible dependent node transmission at a frequency band which is black-listed.

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