Method and apparatus for dynamic frequency selection in a...

Details Method and apparatus for dynamic frequency selection in a... Method and apparatus for dynamic frequency selection in a...

2007-01-30

2007-01-30

Nguyen, Lee (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Optimum frequency selection

C455S063100, C455S067110

Reexamination Certificate

active

10609776

ABSTRACT:
An advance over the prior art is achieved through an efficient method for the dynamic selection of frequencies with low occupancy in a manner that results in minimizing the search for such frequencies and the risk of a large of number of nodes choosing the same frequency. A method for dynamically selecting the frequencies according to the invention includes the following parts. A channel loading indicator that determines if the mobile node needs to look for a new channel. A channel search algorithm that quickly determines the new channel to be used. A tracking algorithm that remembers the channels that were most recently determined to be loaded and hence should be avoided in the near future. In one embodiment of the invention a method of selecting frequencies for use by a device in a wireless communications network is presented. The method includes the steps of monitoring channel usage of given frequencies to determine loaded channels based on whether an associated channel usage threshold has been reached and, if the channel usage threshold has been reached, determining whether to switch from a loaded channel to another channel based on a probability function.

REFERENCES:
patent: 4718107 (1988-01-01), Hayes
patent: 6035196 (2000-03-01), Hengeveld et al.

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