topic Re: Effects on transmit power on access points in Wireless

Effects on transmit power on access points

carl_townshend — Mon, 05 Jul 2021 15:36:58 GMT

Hi All

Can anyone tell me the benefits of increasing TX power on an access point? does it allow the signal to go further? or faster etc ?

Re: Effects on transmit power on access points

Ryo Kato — Thu, 10 May 2018 09:03:52 GMT

It changes the range, high power to run big cells (coverage area), low power for many small cells in a high density environment. Beside that, you can lower the transmit power in 2.4Ghz and help chose the clients the 5GHz cell with stronger signal.

Re: Effects on transmit power on access points

Rasika Nayanajith — Thu, 10 May 2018 09:48:17 GMT

Transmit power is directly translated to energy of the wave, so higher the transmit power, you will see wave goes further. This sounds like increase Tx power is a good idea.

Actually it is not a good idea though. You have to always remember other end is client devices (phones, tablet, pc) which usually does not have that much Tx power (due to handheld devices and battery life time is so important)

As you can see below, if AP Tx power is too high, you will get a good signal strength for client, then client try to transmit higher data rate. But as clients has low Tx power, AP cannot hear it well. So communication problem occurs. So you have to balance AP Tx power to match clients to get better results.

As example, your AP may be capable of Tx 23dBm, but phone 10-14dBm, in that case better to limit your AP Tx power 8-17dBm range rather increase it to max 20 or 23dBm

Pls check this Ciscolive presentation for better understanding above concepts.

HTH

Rasika

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Re: Effects on transmit power on access points

luiggi-moreira — Wed, 04 Sep 2024 04:11:36 GMT

Hello Rasika, would you have the Cisco Live presentation that you mentioned above? Page was not found.

If you still have it, could you kindly send it to me, if possible? luiggimoreira@gmail.com

Thank you so much!

Re: Effects on transmit power on access points

Mark Elsen — Wed, 04 Sep 2024 06:19:54 GMT

- @luiggi-moreira : https://www.ciscolive.com/c/dam/r/ciscolive/emea/docs/2024/pdf/BRKEWN-2926.pdf

Re: Effects on transmit power on access points

luiggi-moreira — Thu, 05 Sep 2024 02:54:45 GMT

Thank you so much, @Mark Elsen ! I appreciate.