Minimum distnace between two AP's

[seema]

I want to discuss about an article appeared on the site

When negotiating access point locations, think about configuration attributes, such as signaling method (i.e., 802.11a or 802.11b), transmit power and antenna type.

802.11b access points generally offer greater range than 802.11a, mainly because 802.11b operates using lower frequencies (2.4GHz instead of 5GHz band).

As a result, the use of an 802.11a network requires access points to be closer together (e.g., 100 feet) as compared to 802.11b (e.g., 500 feet). Keep this in mind when positioning the access points.

is this standrad global or different for Japan .
Thanks and Regards

Seema

[Socal Telephone]

Yes 802.11a will still use the 5GHz band and the 802.11b/g will use the 2.4GHz band. Same all over the world. 802.11a will have less range because of a smaller wavelength and more direct line of sight. Smaller wave will attenuate quicker meaning your output power will have to be higher or more AP's to compensate for it. Now the rules as far as your EIRP could be different in Japan, you will have to check that out with Japan's equivalent of the FCC.