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Author Topic: 300Mbps on 802.11n 2.4Ghz  (Read 22325 times)

SBMongoos

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300Mbps on 802.11n 2.4Ghz
« on: October 14, 2011, 08:23:59 AM »

Is there a way to get this 300Mbps without having to buy DLink WiFi adapters?  I can get it done on the 5Ghz band but not the 2.4Ghz.  I hit 130Mhz max on 2.4Ghz.
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pcjunky

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #1 on: October 14, 2011, 08:32:03 AM »

Make sure channel width is set to auto 20/40 MHz.

If that doesn't do it then you might have to set a fixed channel that as clear space around it to allow 40Mhz.  You can use inSSIDer from metageek.net to check for less crowded wifi channels around you.
« Last Edit: October 14, 2011, 08:38:06 AM by pcjunky »
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FurryNutz

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #2 on: October 14, 2011, 08:37:49 AM »

Make sure your devices can support the 300Mb on 2.4Ghz as well.  ::)
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SBMongoos

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #3 on: October 14, 2011, 08:52:44 AM »

Make sure channel width is set to auto 20/40 MHz.

If that doesn't do it then you might have to set a fixed channel that as clear space around it to allow 40Mhz.  You can use inSSIDer from metageek.net to check for less crowded wifi channels around you.

This is what I'm doing.  Still hitting 130Mpbs.  inSSIDer is a great tool.  It shows 2.4 and 5 at 300(N) on my laptop.  But only connecting at 300 to 5Ghz.

I have the Intel Centrino Avdvanced-N 6250 AGN WiFi card on the laptop.
« Last Edit: October 14, 2011, 08:57:32 AM by SBMongoos »
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FurryNutz

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #4 on: October 14, 2011, 09:35:58 AM »

It's possible that your device might not support 300 Mb connection on 2.4Ghz. I presume you have the 2.4Ghz radio set for single mode N only?
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Cable: 1Gb/50Mb>NetGear CM1200>DIR-882>HP 24pt Gb Switch. COVR-1202/2202/3902,DIR-2660/80,3xDGL-4500s,DIR-LX1870,857,835,827,815,890L,880L,868L,836L,810L,685,657,3x655s,645,628,601,DNR-202L,DNS-345,DCS-933L,936L,960L and 8000LH.

SBMongoos

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #5 on: October 14, 2011, 09:41:12 AM »

It's possible that your device might not support 300 Mb connection on 2.4Ghz. I presume you have the 2.4Ghz radio set for single mode N only?

Yes, if you mean I have the DIR-825 set to 802.11n only for 2.4Ghz.  Channel width is set to 20/40Mhz.  Fat tolerant is disabled on the WiFi card (which says to ignore 40Mhz on 2.4Ghz).
« Last Edit: October 14, 2011, 09:42:47 AM by SBMongoos »
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Patrick533

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #6 on: October 16, 2011, 07:35:00 AM »

The routers made to the latest 802.11n have a "good neighbor" policy built in. This will cause them NOT to go into 40 MHZ mode if your 2.4 band is locally crowded. A couple of pointers, choose channel 1 or 11, this will put your extra 20 Mhz above or below channel 1/11 (if you have a US model).

Also if your device will support it, enable short GI on 2.4, this will get you to 150 if your client supports it and also 300 instead of 270. But not all devices support it. My Dir-825 always has done 300 if the client cooperates!

I hit 300 with my Acer laptop without a hitch, out of the box settings the 1st day I brought it home!
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SBMongoos

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #7 on: October 16, 2011, 07:50:27 AM »

The routers made to the latest 802.11n have a "good neighbor" policy built in. This will cause them NOT to go into 40 MHZ mode if your 2.4 band is locally crowded. A couple of pointers, choose channel 1 or 11, this will put your extra 20 Mhz above or below channel 1/11 (if you have a US model).

Also if your device will support it, enable short GI on 2.4, this will get you to 150 if your client supports it and also 300 instead of 270. But not all devices support it. My Dir-825 always has done 300 if the client cooperates!

I hit 300 with my Acer laptop without a hitch, out of the box settings the 1st day I brought it home!

Short GI is enabled on 5Ghz and 2.4Ghz already.  This is through the DIR-825.

I can see 18 other WiFi signals downstairs. More when on the loft.  Looks like I'm the only one also using 5Ghz though.  I typically use 5Ghz on the laptop and it seems to stay at around 270Mbps. I've tried different channels and 44/48 seem to be best. Otherwise I do see one of the channels getting dropped and that impacts performance.  44/48 seems to be stable.

On the 2.4Ghz I've been using channel 3. Although that channel is clear it does overlap several WiFi signals most of which are using channel 6.  Channel one looks to be using about three APs.  There are 7 APs using channel 11.  I'd prefer to use 2.4Ghz with the laptop as it does a better job maintaining a stronger signal.  But, with all that's going on here that's arguable.  Channel 1 has 2 APs with a third that shows up that's looks to be trying to channel bond.  Plus, my Boxee Box uses 2.4Ghz and is 802.11n. When monitoring it I would say it's doing 130Mbps also.  The router shows throughput at 65Mbps typically.  Which is half of the connection speed.  If I can could get the 300Mbps going then this would boost the WiFi connection to the Boxee.  Although, I will say that I have watched 1080P movies on Vudu without issue.

I'm a little confused by your statement, "A couple of pointers, choose channel 1 or 11, this will put your extra 20 Mhz above or below channel 1/11 (if you have a US model).".  Why choose either of these channels if the extra 20Mhz is above or below channel 1 or 11 if you want to use one of those same channels?  Make sense?
« Last Edit: October 17, 2011, 08:51:46 AM by SBMongoos »
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Patrick533

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #8 on: October 17, 2011, 09:20:46 AM »

Hello again,

There are only 3 20Mhz channels that don't overlap (each of the 11 channels are only 5Mhz each). 1, 6 and 11. Each STANDARD 150Mbps channel is 20Mhz wide. So, knowing this, Channel 1 occupies channels 2 and 3 and also spectrum below channel 1(it is legal), channel 6 occupies channels 4-8 and channel 11 occupies 9, 10 and spectrum above channel 11, once again, this is 20Mhz channels.

Now consider a 40Mhz channel (2 bonded 20Mhz channels). If you choose channel 6 and a 40Mhz channel, you will either be wiping out channels 1-8 or channels or 4-11.

It is confusing for most people to understand when they choose channel 1, they also choose channels 2 and 3.

Now the good neighbor policy implemented in 802.11N in the USA says if there are people on other channels that you would interfere with by selecting a 40Mhz Channel, it won't let you select a 40Mhz channel, by NOT letting you select a 40Mhz channel, it is limiting your speed to 150Mbps or below(depending on many things). The hardware is working as intended by law. Being most people don't use 5Ghz(yet), you should have all the bandwidth you need up there.

The overall problem, when 802.11 was allocated spectrum many years ago, the speeds we use today were not considered, so they did not give us enough spectrum, thus today our channels overlap.

The Dir-825 will indeed do 300Mbps, my new home only has 1 WiFi user in the neighborhood, so I can select a 40Mhz channel and the router will give it to me. I also have another router that will allow me to force a 40Mhz channel and squish anything under it (it also goes to channel 14 instead of 11), but then again I also have an FCC license that is valid in the 2.4Ghz ISM band. But with that license comes the knowledge that by forcing a 40Mhz channel, it is BAD neighbor policy and I could cause interference to other people.

So, quite simply, you have too much interference from local users to do what you want, which is 300Mbps on the 2.4Ghz band.

The reason I advise people to use channel 1 or 11 is, most routers come default on 6, when you use 1 or 11, part of your RF use is outside the band, less interference.

Here is a Wiki article, sorry if i was too technical, Radio engineer for almost 30 years.


http://en.wikipedia.org/wiki/IEEE_802.11




« Last Edit: October 17, 2011, 09:26:30 AM by FurryNutz »
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SBMongoos

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #9 on: October 17, 2011, 11:26:59 AM »

Hello again,

There are only 3 20Mhz channels that don't overlap (each of the 11 channels are only 5Mhz each). 1, 6 and 11. Each STANDARD 150Mbps channel is 20Mhz wide. So, knowing this, Channel 1 occupies channels 2 and 3 and also spectrum below channel 1(it is legal), channel 6 occupies channels 4-8 and channel 11 occupies 9, 10 and spectrum above channel 11, once again, this is 20Mhz channels.

Now consider a 40Mhz channel (2 bonded 20Mhz channels). If you choose channel 6 and a 40Mhz channel, you will either be wiping out channels 1-8 or channels or 4-11.

It is confusing for most people to understand when they choose channel 1, they also choose channels 2 and 3.

Now the good neighbor policy implemented in 802.11N in the USA says if there are people on other channels that you would interfere with by selecting a 40Mhz Channel, it won't let you select a 40Mhz channel, by NOT letting you select a 40Mhz channel, it is limiting your speed to 150Mbps or below(depending on many things). The hardware is working as intended by law. Being most people don't use 5Ghz(yet), you should have all the bandwidth you need up there.

The overall problem, when 802.11 was allocated spectrum many years ago, the speeds we use today were not considered, so they did not give us enough spectrum, thus today our channels overlap.

The Dir-825 will indeed do 300Mbps, my new home only has 1 WiFi user in the neighborhood, so I can select a 40Mhz channel and the router will give it to me. I also have another router that will allow me to force a 40Mhz channel and squish anything under it (it also goes to channel 14 instead of 11), but then again I also have an FCC license that is valid in the 2.4Ghz ISM band. But with that license comes the knowledge that by forcing a 40Mhz channel, it is BAD neighbor policy and I could cause interference to other people.

So, quite simply, you have too much interference from local users to do what you want, which is 300Mbps on the 2.4Ghz band.

The reason I advise people to use channel 1 or 11 is, most routers come default on 6, when you use 1 or 11, part of your RF use is outside the band, less interference.

Here is a Wiki article, sorry if i was too technical, Radio engineer for almost 30 years.


http://en.wikipedia.org/wiki/IEEE_802.11




Personally,  I'm glad you are here and that was extremely helpful and I understand it.  It's clear that in my townhouse community I will not get the 300Mbps on 2.4Ghz due to overlapping channels and the good neighbor policy with 802.11n.  I remember when I had an old dual channel DLink DIR-784 router some time ago that used an Atheros chip that could do 108Mbps on 802.11g.  But I also know that it was said to cause interference for others.

Edit: I do find it ODD however that I can connect to my neighbor at 300Mbps on 2.4Ghz and he's using channel 6 that's VERY crowded. Although it was temporary it seems.

As mentioned I can use 5Ghz on the laptop. I don't understand why media devices don't have 5Ghz as this has been a selling point for those selling WiFi routers with 5Ghz.  To move media over to 5Ghz.  But, you cannot when your media device only has 2.4Ghz.  Was hoping to tweak the 2.4Ghz to 300Mbps for my Boxee Box. Again,  all seems to be working anyway. But... blah blah (LOL).
« Last Edit: October 17, 2011, 12:08:10 PM by SBMongoos »
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Patrick533

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #10 on: October 17, 2011, 12:56:49 PM »

Personally,  I'm glad you are here and that was extremely helpful and I understand it.  It's clear that in my townhouse community I will not get the 300Mbps on 2.4Ghz due to overlapping channels and the good neighbor policy with 802.11n.  I remember when I had an old dual channel DLink DIR-784 router some time ago that used an Atheros chip that could do 108Mbps on 802.11g.  But I also know that it was said to cause interference for others.

Edit: I do find it ODD however that I can connect to my neighbor at 300Mbps on 2.4Ghz and he's using channel 6 that's VERY crowded. Although it was temporary it seems.

As mentioned I can use 5Ghz on the laptop. I don't understand why media devices don't have 5Ghz as this has been a selling point for those selling WiFi routers with 5Ghz.  To move media over to 5Ghz.  But, you cannot when your media device only has 2.4Ghz.  Was hoping to tweak the 2.4Ghz to 300Mbps for my Boxee Box. Again,  all seems to be working anyway. But... blah blah (LOL).

Well, there are routers out there that you can force 40Mhz bandwidth on and run at 300Mbps, regardless of how many people that are on the frequency. I have one(actually 2) and you could buy one just as easy as I did. They also put out a bunch more power then the D-Link ones, but honestly I like the D-Link quality. The best way to go is hard wire if you really need the bandwidth. Some of the older routers too before the good neighbor policy should work. I think maybe even DD-WRT ignores the good neighbor policy, but I could be wrong.

In the end, one way or another with 2.4Ghz WiFi and Cordless phones and 5Ghz WiFi and Cordless phones, the government is going to have to kick down some more spectrum for us people at home. Speeds are going to keep getting faster, and the faster the data rate, the more spectrum you need.

Also, that is one thing I forgot to mention, 2.4Ghz cordless phones can cause you to NOT be able to use 300Mbps too(they cause interference). At home I use 2.4Ghz WiFi and 5Ghz Cordless phones, DECT phones are also a good option, they used to be 1900Mhz but I think they have new frequencies on newers models. Lets NOT forget microwave ovens, they are at 2.45Ghz and destroy the WiFi band. That’s why they call it the ISM band. Industrial, Scientific, Medical, with no license below 4 watts ERP.

Also a big difference with the routers I have at home that will run 40Mhz all day long. No IPV6, that is why I bought my 825 and use it 100% of the time, I can leave my 825 on for months on end without a hitch. Don't know yet if the other 2 routers will make it through a Cali summer like my D-Link has.
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SBMongoos

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #11 on: October 17, 2011, 01:12:45 PM »

Well, there are routers out there that you can force 40Mhz bandwidth on and run at 300Mbps, regardless of how many people that are on the frequency. I have one(actually 2) and you could buy one just as easy as I did. They also put out a bunch more power then the D-Link ones, but honestly I like the D-Link quality. The best way to go is hard wire if you really need the bandwidth. Some of the older routers too before the good neighbor policy should work. I think maybe even DD-WRT ignores the good neighbor policy, but I could be wrong.

In the end, one way or another with 2.4Ghz WiFi and Cordless phones and 5Ghz WiFi and Cordless phones, the government is going to have to kick down some more spectrum for us people at home. Speeds are going to keep getting faster, and the faster the data rate, the more spectrum you need.

Also, that is one thing I forgot to mention, 2.4Ghz cordless phones can cause you to NOT be able to use 300Mbps too(they cause interference). At home I use 2.4Ghz WiFi and 5Ghz Cordless phones, DECT phones are also a good option, they used to be 1900Mhz but I think they have new frequencies on newers models. Lets NOT forget microwave ovens, they are at 2.45Ghz and destroy the WiFi band. That’s why they call it the ISM band. Industrial, Scientific, Medical, with no license below 4 watts ERP.

Also a big difference with the routers I have at home that will run 40Mhz all day long. No IPV6, that is why I bought my 825 and use it 100% of the time, I can leave my 825 on for months on end without a hitch. Don't know yet if the other 2 routers will make it through a Cali summer like my D-Link has.


Ya...have thought about DD-WRT but DLink routers can be a real pain to work with in regards to firmware at times. Had a few cases where I thought I bricked a couple of mine.  Came back the next day and got them up and running without a hitch. So I'm reluctant to try DD-WRT.

My cordless phone system is on the 5Ghz band.  Will replace them with DECT when have to.  I have not heard any issues between 5Ghz cordless phones and the WiFi 5Ghz.

But... since I'm in a townhouse it could also be that a neighbor on an adjoining wall may have 2.4Ghz phones and interfere with my DIR-825.  It's possible.
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Patrick533

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #12 on: October 17, 2011, 03:21:56 PM »

Ya...have thought about DD-WRT but DLink routers can be a real pain to work with in regards to firmware at times. Had a few cases where I thought I bricked a couple of mine.  Came back the next day and got them up and running without a hitch. So I'm reluctant to try DD-WRT.

My cordless phone system is on the 5Ghz band.  Will replace them with DECT when have to.  I have not heard any issues between 5Ghz cordless phones and the WiFi 5Ghz.

But... since I'm in a townhouse it could also be that a neighbor on an adjoining wall may have 2.4Ghz phones and interfere with my DIR-825.  It's possible.

Living in my last home was bad, I could not imagine a townhouse. There was no less then 30 routers Inssider found, a bunch were forced 300(270). I have never had a problem with my 5Ghz phone, I did with my 2.4 though. When I first moved into my home, there was 1, that is one WiFi node, 12 years later 30.
Also, the next city over offers free 2.4 WiFi. I literally could not make it 50 feet from my 2.4 without loosing it. Finally I was a bad neighbor and cranked up the power so high, no one could interfere. Since I have moved I have reduced the power. On guy kept following me from channel to channel on my AP at my previous home, trying to hack me I guess, there was alot of attempted accesses to my AP(flooded the logs). So I bought a directional antenna, cranked up the power and returned the favor with around 100K IP requests. He disappeared after that, so did the MAC address of his router. I don't look forward to leaving the "hills" where I live now and going back to the suburbs.

Hope everything works out.
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SBMongoos

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #13 on: October 17, 2011, 04:50:37 PM »

Living in my last home was bad, I could not imagine a townhouse. There was no less then 30 routers Inssider found, a bunch were forced 300(270). I have never had a problem with my 5Ghz phone, I did with my 2.4 though. When I first moved into my home, there was 1, that is one WiFi node, 12 years later 30.
Also, the next city over offers free 2.4 WiFi. I literally could not make it 50 feet from my 2.4 without loosing it. Finally I was a bad neighbor and cranked up the power so high, no one could interfere. Since I have moved I have reduced the power. On guy kept following me from channel to channel on my AP at my previous home, trying to hack me I guess, there was alot of attempted accesses to my AP(flooded the logs). So I bought a directional antenna, cranked up the power and returned the favor with around 100K IP requests. He disappeared after that, so did the MAC address of his router. I don't look forward to leaving the "hills" where I live now and going back to the suburbs.

Hope everything works out.


Well, when you size it up there's no real complaint.  Just trying to hit that top tier of what's possible.  As you read previously it's all working fine so...

One option, for the adventurous, would be to yank the WiFi card in the Boxee Box and put in a dual band card. You'd have to hack the Boxee software to get it to work with 5Ghz.  Here's a link for the tear down of the Boxee Box showing the WiFi card if you're curious (FurryNutz might get a kick out of this as this site also has images of a complete tear down of the Boxee Box).

http://www.techrepublic.com/photos/boxee-box-d-link-teardown/489453?seq=33&tag=thumbnail-view-selector;get-photo-roto
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Ryssen

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Re: 300Mbps on 802.11n 2.4Ghz
« Reply #14 on: October 24, 2011, 12:12:19 PM »

Where do  find the Short GI in DI 825?
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