System and method for determining channel quality in a...

Details System and method for determining channel quality in a... System and method for determining channel quality in a...

2005-06-23

2009-12-22

Mehrpour, Melody (Department: 2617)

Telecommunications

Transmitter and receiver at separate stations

Optimum frequency selection

C455S450000, C455S507000, C370S329000

Reexamination Certificate

active

07636550

ABSTRACT:
A system and method for Access Point (AP) channel selection based upon a Channel Quality Index (CQI) is described. The Channel Quality Index (CQI) is a value which quantifies a transmission quality of a channel. The transmission quality is evaluated based on a combination of different types of measured interference in the channel. In one embodiment the different types of measured interference include co-channel congestion, adjacent channel interference and in-band interference. The CQI is a value derived from the measurements, and for example may be a sum of all of the measurements. Each AP of the present invention determines the CQI of potential transmission channels, and selects a channel for use which has the ‘best’ CQI; for example if the CQI is a sum of all measured interferences, the ‘best’ AP is the one with the lowest CQI

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