SmallNetBuilder Forums
Go Back   SmallNetBuilder Forums > Wireless Networking > Wireless Article Discussions

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 02-24-2012, 01:05 PM
kk22 kk22 is offline
Member
 
Join Date: Dec 2010
Posts: 30
Thanks: 10
Thanked 1 Time in 1 Post
kk22 is just starting out
Default Why 802.11ac Will Kill The 5 GHz Wi-Fi Band

Reference:
http://www.smallnetbuilder.com/wirel...hz-wi-fi-band/

That was an interesting piece. Thanks Tim.

"The gist of all this is that 802.11ac, even in the first draft devices appearing this year, can reduce the effective number of available 5 GHz channels from nine to two!"

That's indeed a scary thought. I can already detect 30+ networks in the 2.4Ghz band in my townhouse complex neighborhood, with about 12 on Channel 1, 8 on Channel 6 and 7 on Channel 11, and a few using the in-between channels. The end result is my 2.4Ghz wireless N speeds aren't the best and there are times when the connection would drop.

I've since moved to the cleaner 5Ghz space and got more stability and speed for my laptops, but it looks like 802.11ac will make crowded neighborhoods a bigger nightmare for stable wireless connectivity.

Is there anything else in the works for wireless connectivity besides 802.11ac?
Reply With Quote
  #2  
Old 02-24-2012, 02:09 PM
darksamus darksamus is offline
Very Senior Member
 
Join Date: Jan 2012
Posts: 209
Thanks: 0
Thanked 18 Times in 15 Posts
darksamus is just starting out
Default

Quote:
Originally Posted by kk22 View Post
Reference:
http://www.smallnetbuilder.com/wirel...hz-wi-fi-band/

That was an interesting piece. Thanks Tim.

"The gist of all this is that 802.11ac, even in the first draft devices appearing this year, can reduce the effective number of available 5 GHz channels from nine to two!"

That's indeed a scary thought. I can already detect 30+ networks in the 2.4Ghz band in my townhouse complex neighborhood, with about 12 on Channel 1, 8 on Channel 6 and 7 on Channel 11, and a few using the in-between channels. The end result is my 2.4Ghz wireless N speeds aren't the best and there are times when the connection would drop.

I've since moved to the cleaner 5Ghz space and got more stability and speed for my laptops, but it looks like 802.11ac will make crowded neighborhoods a bigger nightmare for stable wireless connectivity.

Is there anything else in the works for wireless connectivity besides 802.11ac?
Once all the vendors move to 802.11ac, the 2.4ghz will be back to less crowded!

One thing I don't like about this new standard or any wifi is that if you want higher bandwidth, you have to use 80mhz wide bandwidth and you know everyone is going to use it and it will start to overlap your neighbor's channels.

I forgot to mention that with new TVs that are going to be wifi enable from its base will be using 5ghz which means if your neighbors has that type of TV, you can bet that you will be able to pick up what they are watching.

Last edited by darksamus; 02-24-2012 at 02:11 PM.
Reply With Quote
  #3  
Old 02-24-2012, 02:12 PM
thiggins's Avatar
thiggins thiggins is online now
Mr. Easy
 
Join Date: May 2008
Posts: 9,191
Thanks: 165
Thanked 629 Times in 533 Posts
thiggins is just starting out
Default

Quote:
Originally Posted by darksamus View Post
Once all the vendors move to 802.11ac, the 2.4ghz will be back to less crowded!
Not likely. 11ac products will all be dual band, implementing bgn in 2.4 GHz.
__________________
Tim Higgins
Managing Editor,SmallNetBuilder.com
Reply With Quote
  #4  
Old 02-24-2012, 02:13 PM
thiggins's Avatar
thiggins thiggins is online now
Mr. Easy
 
Join Date: May 2008
Posts: 9,191
Thanks: 165
Thanked 629 Times in 533 Posts
thiggins is just starting out
Default

Quote:
Originally Posted by kk22 View Post
Is there anything else in the works for wireless connectivity besides 802.11ac?
60 GHz technologies (WiGig and WirelessHD) are out there. But are short-range only.
__________________
Tim Higgins
Managing Editor,SmallNetBuilder.com
Reply With Quote
  #5  
Old 02-24-2012, 06:24 PM
irev210 irev210 is offline
New Member
 
Join Date: Jan 2012
Posts: 7
Thanks: 1
Thanked 0 Times in 0 Posts
irev210 is just starting out
Default

I live in an urban environment and just fired up the latest version of inSSIDer.

In my apartment I pick up 133 access points.

87 at 2.4GHz (24 of them are a local university)
46 at 5GHz (35 of them are a local university)



Sad that 5GHz will become overcrowded.

Last edited by irev210; 02-24-2012 at 06:59 PM.
Reply With Quote
  #6  
Old 02-24-2012, 07:04 PM
RogerSC RogerSC is offline
Very Senior Member
 
Join Date: Oct 2009
Posts: 1,400
Thanks: 21
Thanked 201 Times in 178 Posts
RogerSC is just starting out
Default

Well, on the other hand, 5GHz. signals don't propagate nearly as well as 2.4GHz. signals. So I guess that the largest effects will be on people in apartment building. I see lots of 2.4GHz. networks, too, but I wouldn't expect to see more than one or two 5GHz. networks, from my immediate neighboring houses on either side of me. And not everyone jumps onto the new stuff, my immediate neighbor on one side of me, the strongest 2.4GHz. signal, is still using wireless-g with WEP *smile*. I'm guessing that at least they won't be jumping on the newest 5GHz. tech.
Reply With Quote
  #7  
Old 02-24-2012, 09:37 PM
DaveMcLain DaveMcLain is offline
Senior Member
 
Join Date: Jun 2009
Posts: 164
Thanks: 0
Thanked 2 Times in 2 Posts
DaveMcLain is just starting out
Default

It appears that 11ac must take about an order of magnitude more processing power over 11n to implement so maybe it'll also have a lot more sophisticated "good neighbor" behavior when other networks are around competing for air time.

Great article Tim, thanks.
Reply With Quote
  #8  
Old 02-24-2012, 10:24 PM
stevech stevech is offline
Very Senior Member
 
Join Date: Mar 2010
Location: San Diego
Posts: 4,852
Thanks: 1
Thanked 352 Times in 340 Posts
stevech is just starting out
Default

what we Don't need is more people with one-way over-powered WiFi routers/access points. That increases the radius of coverage, but only one-way... to the client.
The from-client radius of coverage is unchanged.

For those old enough to remember the hay-days of Citizen's Band Radio... we had too many people that used hundreds of watts. This and user behavior became so out of control that the US FCC abandoned licensing and managing use of the band. It more or less self destructed for all but the truckers who use it for quasi-valid reasons in this cell phone era.

My point is... if 2.4 then 5.8GHz are grossly misused, versus the original intent of low power, short range, SHARED-USE, then we all are impacted. The 40MHz mode of 11n is misuse, as it burdens 2/3 of the entire band. Not a problem if you are a light-use or rural user.

Last edited by stevech; 02-24-2012 at 10:26 PM.
Reply With Quote
  #9  
Old 02-24-2012, 10:54 PM
RogerSC RogerSC is offline
Very Senior Member
 
Join Date: Oct 2009
Posts: 1,400
Thanks: 21
Thanked 201 Times in 178 Posts
RogerSC is just starting out
Default

Yes Steve, I remember being bemused by the sales of massive linear amplifiers to CBer's. Really created an unusable zoo, but I guess it made the really loud guys happy. So it goes. Hopefully that "if a little is good, more is better" philosophy won't be carried into this arena.
Reply With Quote
  #10  
Old 02-25-2012, 11:14 AM
thiggins's Avatar
thiggins thiggins is online now
Mr. Easy
 
Join Date: May 2008
Posts: 9,191
Thanks: 165
Thanked 629 Times in 533 Posts
thiggins is just starting out
Default

Quote:
Originally Posted by RogerSC View Post
Well, on the other hand, 5GHz. signals don't propagate nearly as well as 2.4GHz. signals.
Good point, which I forgot to include. I'll add it.

On the other hand, for enterprise use, with lots of APs, 80 MHz wide channels are going to make it more difficult for channel assignment.
__________________
Tim Higgins
Managing Editor,SmallNetBuilder.com
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


All times are GMT -4. The time now is 08:48 AM.


Top 10 Stats
Top Posters* Top Thanked
RMerlin  400
john9527  160
azazel1024  122
htismaqe  103
sfx2000  87
stevech  74
ColinTaylor  69
AndreyPopov  58
TonyH  54
bbb0777  42
RMerlin  6061
john9527  391
stevech  351
ryzhov_al  280
TeHashX  237
L&LD  232
RogerSC  201
sinshiva  147
sfx2000  134
joegreat  126
Most Viewed Threads* Hottest Threads*
Old Asuswrt-Merli...  30087
Old RT-AC68P...  2795
Old Brainstorming...  2699
Old Advice on...  2610
Old Looking for...  2366
Old RT-AC68U...  1912
Old Asus...  1825
Old Issues...  1786
Old Stable...  1694
Old AC-68...  1628
Old Asuswrt-Merli...  212
Old Advice on...  49
Old Brainstorming...  49
Old Looking for...  35
Old RT-AC68P...  33
Old WiFi...  27
Old Stable...  25
Old Issues...  25
Old WiFi Rates  23
Old RT-AC68U...  22


Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
© 2006-2014 Pudai LLC All Rights Reserved.