Re: problem on ACS

On Sun, Jul 31, 2011 at 11:01 PM, MingAnn Ng [off-list ref] wrote:

Hi Luis,

I have apply the patch which you've provided. the result is shown as below:

channel=1
2412 MHz: 12.600000
2417 MHz: 9.900000
2422 MHz: 11.300000
2427 MHz: 11.200000
2432 MHz: 13.600000
2437 MHz: 11.800000
2442 MHz: 12.300000
2447 MHz: 11.600000
2452 MHz: 11.300000
2457 MHz: 12.100000
2462 MHz: 10.100000
2467 MHz: 10.800000
2472 MHz: 11.100000
5180 MHz: 1.600000
5200 MHz: 2.400000
5220 MHz: 3.000000
5240 MHz: 3.200000
5260 MHz: 2.900000
5280 MHz: 4.100000
5300 MHz: 3.700000
5320 MHz: 3.000000
5500 MHz: 0.100000
5520 MHz: -0.100000
5540 MHz: -0.300000
5560 MHz: -1.100000
5580 MHz: -1.200000
5600 MHz: -1.200000
5620 MHz: -2.400000
5640 MHz: -1.000000
5660 MHz: -1.300000
5680 MHz: -1.200000
5700 MHz: -0.300000
Ideal freq: 5620 MHz

channel=36
2412 MHz: 12.300000
2417 MHz: 9.900000
2422 MHz: 11.700000
2427 MHz: 12.200000
2432 MHz: 14.300000
2437 MHz: 13.000000
2442 MHz: 12.900000
2447 MHz: 13.300000
2452 MHz: 11.500000
2457 MHz: 12.100000
2462 MHz: 12.200000
2467 MHz: 11.600000
2472 MHz: 11.100000
5180 MHz: 3.800000
5200 MHz: 2.000000
5220 MHz: 2.100000
5240 MHz: 3.200000
5260 MHz: 2.200000
5280 MHz: 3.000000
5300 MHz: 2.500000
5320 MHz: 1.900000
5500 MHz: -0.800000
5520 MHz: -0.700000
5540 MHz: -0.800000
5560 MHz: -1.600000
5580 MHz: -2.000000
5600 MHz: -1.700000
5620 MHz: -2.700000
5640 MHz: -1.800000
5660 MHz: -1.800000
5680 MHz: -1.900000
5700 MHz: -1.000000
Ideal freq: 5620 MHz

As you can see, the value of the interference factor is smaller than the
last case.

Is it a problem when the interference factor has a slight increment when it
scan the assigned channel?

It could be related to the calibration runs that take effect upon
channel changes with the driver. To account for this I increased the
offcannel time on the hostapd patches but did not do this on the
standalone acs.git tree for the acs tool. I've committed a change for
this and pushed it out. Please test it.

  Luis