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atma_tiwana's profile

Fri, Feb 26, 2021 5:36 PM

Unleashed Transmit Power

Hi,

I was looking at options on unleashed on my R500 and saw Transmit power was set to auto. 

But according to the link below it should not be in Auto.

Can someone confirm this is still the case?

https://docs.ruckuswireless.com/unleashed/200.1.9.12/c-SelfHealing.html

Responses

2 Messages

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88 Points

2 m ago

If you ask a software engineer it should be auto.  If you ask a system engineer it should be not set to auto.  Flip the switch and see if you can measure a difference.

36 Messages

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718 Points

I have set it manually now, but I wanted to know if using it in auto "breaks" anything. 

Normally I guess people will go Max, but that isn't the answer.

If the answer is "Auto is OK",  how does it choose the power level, does it look at other AP's and adjust (that's self healing?), or does it look at client connection and adjust.

Is it a constantly dynamic in realtime or change every hour, day etc. 

Because they state 

Note: In general, Ruckus does NOT recommend enabling this feature as it can lead to non-optimal AP power levels. With BeamFlex access points, Ruckus' general guidelines are to run access points at full power to maximize the throughput and SINR levels, thus maximizing data rates and performance.

(edited)

320 Messages

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4.3K Points

I actually have never seen any positive effect from lower transmit power in any vendor APs. Exception may be cases, when there is just really too much APs, which is not usual situation. Even than I never seen it really improving anything.

Typically you have settings to change  power for 8 db max, and this is not really a big difference  when you are far from receive sensitivity threshold.  Changing antenna orientation, you can get 10+ db signal level change. So receiver should handle such small level differences  easy.

36 Messages

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718 Points

Hi,

I’m just wondering that if they say don’t use Auto, why it’s auto by default ?

Also I thought having “screaming” signals was considered bad practice ?

Official Rep

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885 Messages

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13K Points

1 m ago

Hi Atma,

It seems you are referring the online document for Unleashed 200.1.

Is your AP is on 200.1? If yes, upgrade it.

Auto is the default for all the APs when configured and managed by a controller and this means full power, until ACS feature (Auto Cell Size) is enabled. ACS is only supported on newer version.

Regards,

Syamantak Omer

36 Messages

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718 Points

@syamantak_omer Thanks.

I have the latest firmware and I was wondering about transmit power and that was all I could find about it.

When you say managed by a controller are you referring to a unleashed controller and /or a zone controller ZD or whatever they are called. ?

Official Rep

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885 Messages

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13K Points

Any controller based APs including Unleashed.

Regards,

Syamantak Omer

320 Messages

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4.3K Points

1 m ago

About "screaming" signals. Theoretically it is a solid reasoning. But actually -- it is not.

Idea is that unnecessary high signal will create interference to neighbors. Actually it is not really the case. In practice neighbor networks usually have levels -70 -- -80 dbm, often -- even higher, so if your AP power is lowered for 6 db, it is still much over sensitivity level, and you'll get same interference. So in such environment   the only question is how many free airtime is there, as all devices on same channel share same airtime. When AP power is higher, data download happens much faster (because higher modulation is used), so it takes less time, which gives more room for all other clients. On power used by clients (by far bigger number than APs) you have no control whatever anyway. 

So in real life lowering AP power almost never improves things, except some specific situations. Changing channels may have much higher impact.

This is actually correct for all vendors, but especially for Ruckus, because of Ruckus Beamflex which improves signal in client direction and makes transmitted signal levels much lower for other directions.

(edited)

Official Rep

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885 Messages

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13K Points

@eizens_putnins nicely explained!

Also, for the best and optimized performance, a site survey is the kay.

Regards,

Syamantak Omer