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802.11n throughput problem

Posted: Mon Feb 06, 2012 9:48 am
by Roy
I'm testing RB433GL with Compex(WLM200N5-23, 2X2 mimo) and UNEX(DNMA-H5 3X3 mimo).
My PCs have Gigabit ethernet port.

I set
- AP-Bridge mode
- 5GHz-A/N
- 20/40MHz HT Ablove
- 5200MHz
- HT Tx chain: Chain0, Chain1
- HT Rx chain: Chain0, Chain1
- HT Guard Interval: any
- WDS mode: dynamic mesh
- other things are all factory default parameter.

below capture, you can see 20/40MHz as I set.
40MHz_setup.jpg
But below capture, scanned result is only 20MHz.
scanresult.jpg
Throughput test is only around 20Mbps. I wish more then 200Mbps at indoor.
I bet, in our test room, there is no 5GHz device and other 5GHz wireless device is more then 200Mbps.


I wish to get answer any of you.
And strongly wish to get answer from mikrotik.

Re: 802.11n throughput problem

Posted: Wed Feb 08, 2012 4:02 am
by Roy
any comment?

Re: 802.11n throughput problem

Posted: Wed Feb 08, 2012 10:05 pm
by rodolfo
you have too high signals.
try to low the power having at maximum -54/-54 dbm
the, show your registration page, showing also ccq.

Re: 802.11n throughput problem

Posted: Thu Feb 09, 2012 3:23 am
by Roy
you have too high signals.
try to low the power having at maximum -54/-54 dbm
the, show your registration page, showing also ccq.
Thank you for your answer.
I also tested with lower RSSI.
Results are not so good.

And I do not think High RSSI is related with low throughput.

Yesterday I changed to Mikrotik R52Hn minipci card. but scan result is same only 20MHz scanned.
Am I wrong? or other people have same experience?

Re: 802.11n throughput problem

Posted: Thu Feb 09, 2012 4:02 am
by Chewers
Lower Tx Power (u should have around -45 to -55dBm)
Then set AP and Client:
HT Guard Interval to long
HT Extension Channel to Above Control
Select all 7 Options under HT AMPDU Priorities

Re: 802.11n throughput problem

Posted: Fri Feb 10, 2012 8:42 am
by Roy
Lower Tx Power (u should have around -45 to -55dBm)
Then set AP and Client:
HT Guard Interval to long
HT Extension Channel to Above Control
Select all 7 Options under HT AMPDU Priorities
What it mean " HT Extension Channel to Above Control"
I don't know how it control

Re: 802.11n throughput problem

Posted: Fri Feb 10, 2012 2:26 pm
by Chewers
Should look like this. ROS V5

Re: 802.11n throughput problem

Posted: Sat Feb 11, 2012 6:44 pm
by christyjame
Hi Friend . . .

Thank you very much for this post . . .

Re: 802.11n throughput problem

Posted: Sun Feb 12, 2012 5:08 am
by Roy
Should look like this. ROS V5
Hi Chewers,
Thank you for your answer. but I cannot find HT extension channel.
ht extension channel.jpg
Is it difference of version?
I'm v5.9

Re: 802.11n throughput problem

Posted: Sun Feb 12, 2012 5:45 am
by Roy
Should look like this. ROS V5
My test result is,
Throughput is from 20Mbps to 100Mbps and very fluctuated.
I'm expecting more then 200Mbps.

What's your throughput result?
You experience 200Mbps with RB?

Re: 802.11n throughput problem

Posted: Sun Feb 12, 2012 11:43 am
by cieplik206
Roy

You will never get 200 mbps using WDS

Re: 802.11n throughput problem

Posted: Sun Feb 12, 2012 12:47 pm
by Roy
Roy

You will never get 200 mbps using WDS
OK, then how should I set for 200Mbps?
And, do you know maximum throughput in Mesh mode?

skype: roy.s.j.yeo

802.11n throughput problem

Posted: Tue Feb 14, 2012 3:50 am
by DynStatic
you already set 'HT extension channel above' with '20/40 MHz above' in channel size. that option moved in Ros 5.

I would suggest using mpls ptp wireless link guide on wiki if you don't want to use wds.