In this paper, a channel selection metric is presented for WLAN. It is based on SNR and the number of users. A delay time is employed to define metric of channel selection. Nth-order polynomials are introduced to obtain a polynomial metric in a tractable form. The advantage of formulation is that more parameters other than SNR or the number of users can be added to metric without taking up complex delay analysis. Numerical results are presented to demonstrate metric as a function of SNR and the number of users. The effective range of metric is discussed with a difference between the polynomial and delay time metrics.
