Forum

i want to learn more about 802.11e MAC, HCF, etc, where i can get a good paper about this?

in February of 2004 the FCC regulated of 11 additional channels in the unlicensed 5 ghz UNII band, who know something about this??

Did you find anything else about this? I've also been looking for this info still. In my own pondering, I'm guessing that the IEEE just hasn't done anything to embrace it, which is why we're not having it available to us yet.

I'm certainly anxious to see if they are going to formalize anything using this new spectrum.

Those new 11 channels are only available in the U.S. if the equipment supports 802.11h. Those channels are 100-140. Most equipment (especially consumer equipment) doesn't support those channels.

The best reference to learn about 802.11e is the IEEE 802.11 Handbook, Second Edition. You have to buy it, but in my opinion it's well worth it if you need to understand standards.

Actually, in the US there are 12 additional channels that are made available with the utilization of 802.11h. Here are the original UNII channels:

UNII-1 and UNII-2 (5.15-5.35GHz): 36, 40, 44, 48, 52, 56, 60, and 64 = 8 channels

UNII-3 (5.725-5.805GHz): 149, 153, 157, and 161 = 4 channels

802.11h allows use of the mid-spectrum between UNII-2 and UNII-3 (5.47-5.725GHz): 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, and 140 = 11 channels

PLUS one channel in the ISM band at 5.825GHz: 165 = 1 channel

so, 8+4+11+1 = 24 total channels available when using 802.11h in the US (other countries may vary). Of course you need radios that can tune to these channels and support .11h -- most enterprise capable equipment I've seen can support this with a firmware upgrade, unless it's pretty old.

Joel