Talk:IEEE 802.11

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Editing woes

I just made a number of small edits to the main 802.11 page. Along the way I somehow (unintentionally) affected some other people's edits??? There appears to be some problem with either the wiki server or my workstation??? Can anyone suggest what might have gone wrong, and how I can fix it? My apologies to those whose edits were affected - that was NOT my intent.

Addressing ?

This page says nothing about frame addressing (MAC frames) etc. It is as if 802.11 was only a specification of frequency ranges and bandwidths. —Preceding unsigned comment added by 190.21.193.6 (talk) 13:56, 1 May 2008 (UTC)[reply]

802.11n 540 Mbps ?

Where did this value come from? Seems questionable to me.

Mike Moreton 11n adds an additional 5/6 coding, that means you increase the maximum OFDM bit rate from 54Mbps to 65Mbps.

With 40MHz channels, you get slightly more than double because the guard bands at the sides of the channel are shared over 40MHz rather than 20MHz, which takes you to 135Mbps.

But that's one stream - four streams gives you 540Mbps. If you have very good reception!

There's also a reduced gurad interval option that takes it up to 600Mbps...

Terrible writing

The third paragraph on the page is terrible (I'd edit it, but this would entail poring through a lot of other related material). Ideally, the first reference should be to ISM band regulations and refer to the FCC on a secondary basis. The FCC is not a global organization! The language and English should be improved in this paragraph as well.

Conflicting information?

In the summary it lists ranges in feet, but in the sub sections, it lists in metres, and the numbers do not even align with the summary box. See 802.11b as an example. —The preceding unsigned comment was added by 68.108.180.53 (talk) 07:15, August 22, 2007 (UTC)

802.11n is out!!!

I have a linksys WRT300N and it uses 802.11n draft 2.

This artical needs some big edting!!! —Preceding unsigned comment added by 12.217.212.109 (talk) 16:10, 2 April 2008 (UTC)[reply]

802.11n is not out.

Members of the Wi-Fi alliance have irresponsibly begun to release hardware based on 802.11n drafts before the completion of the standard; this is (generally, albeit not specifically) mentioned in the introductory statements for the article. That is why your Linksys WRT300N uses 802.11n draft 2 instead of 802.11n. Such hardware may or may not be compatible with the final specification.

In the future, don't make such emphatic statements regarding things you don't know. —Preceding unsigned comment added by 98.212.197.163 (talk) 01:18, 21 July 2008 (UTC)[reply]

802.11 with interference?

Question: what happens when 802.11 devices have to negotiate down to accommodate interference? I.E., when device A and WAP A have to negotiate their speed down to talk to each other is there any change in the speed with which device B and WAP A will use to talk to each other? —Preceding unsigned comment added by 71.39.173.163 (talk) 00:00, 29 May 2008 (UTC)[reply]

YES. Wireless is a shared spectrum, all clients associated to an access point are effected by other client's connection speed as they need to wait for slower clients to finish their transmissions. Although the transmission speed between device B and WAP A will not slow down, the amount of time available for the device and WAP to transmit data will be diminished slowing down the overall data rate.