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Loopsmark

Occasional Visitor
Hi,

I have a scenario where a desktop has to communicate with a phone. The desktop will send a video stream to the phone, and the phone will some packets to the desktop.
All this will happen in an environment where there will be lots of interference.
The idea is that the desktop will use a Intel Dual Band Wireless-AC 7260 mini pci express card with 7dB antennas (or maybe is it better an USB adapter?) to transmit to an access point that is in its 20 meters range, because of all the interference, I thought about an R5AC-PTP from Ubiquiti with an airMAX 2x2 BaseStation Sector Antenna. The access point reaches the router through LAN. To the router there will be only one phone (iPhone 6, i.e. 433 Mbps...) and I thought about the D-Link DIR-890L/R AC3200 Ultra Wi-Fi Router considering its high throughput and range in the 5GHz band.

What do you guys think? Would you change something?
 
If the AP is 20 meters away just use ethernet. Theres really no point having a server on wireless because of varying speeds. The more users there are on wifi the worse the throughput when all are using it at the same time. For example streaming from one system to another both on the same wifi with the phone being single stream will limit the throughput very significantly.

Put your servers on wire and your clients can be on wifi.
 
Sadly, to have the server on a wire, is not an option because of environment reasons, otherwise I would have go to wire without doubt.
 
You could use coax or IP overpowerline. Both options though slower than ethernet give more consistent speeds and more speeds than you will get from AC wifi. Unless you're willing to spend on a lot of APs and antennas because proper wifi bridging is rarely done.
 
Thanks System, but wireless is really the only option I have...
Why you say "spend on a lot of APs and antennas"? I think one AP to get the server is the only one I need.
 
Extending wireless the right way.
Example setup with 1 bridge.
((([AP])))---[router]---[AP])))))((((([AP]----((([AP])))
In your case
((([router]))))----[AP])))))((((([Desktop with directional antenna]
Is what you need to do with minimal things. Directional antenna is very important on both ends to ensure the optimum throughput. If it doesnt go well you may need another of the same AP connected to the ethernet port of a desktop since 2 APs using the same radios and the same antennas achieve the best configuration for a wifi bridge. Make sure to use those directional antennas.
 
Thanks System, but wireless is really the only option I have...
Why you say "spend on a lot of APs and antennas"? I think one AP to get the server is the only one I need.
That AP needs to connect by cat5 or MoCA or IP over power line. Else you'll be using a repeater and those work poorly but do work and are easy to config.
 
That AP needs to connect by cat5 or MoCA or IP over power line. Else you'll be using a repeater and those work poorly but do work and are easy to config.
Yes, that is clear, the AP will connect through cat5 to the router.
 
Extending wireless the right way.
Example setup with 1 bridge.
((([AP])))---[router]---[AP])))))((((([AP]----((([AP])))
In your case
((([router]))))----[AP])))))((((([Desktop with directional antenna]
Is what you need to do with minimal things. Directional antenna is very important on both ends to ensure the optimum throughput. If it doesnt go well you may need another of the same AP connected to the ethernet port of a desktop since 2 APs using the same radios and the same antennas achieve the best configuration for a wifi bridge. Make sure to use those directional antennas.

Actually my case would be:

[Phone])))((([Router]---[AP])))(((Desktop] (Because we can consider the router as an AP as well, right?)

I cannot use directional antennas because the server is moving, that is also the reason why the AP has a (overkill?) sector antenna with ~120deg beam width and 19dBi at 5GHz.
And regarding the router, I realize that the D-Link DIR-890L/R AC3200 Ultra Wi-Fi makes no sense since there will be no devices compatible with that. I am thinking now about getting the Netgear R7000.
 
Dlink doesnt make quality hardware and firmware so i never recommend it.

In making a wifi bridge or point to point wifi, directional antennas are required for interference reasons. Cant you leave the server in 1 spot? While a sector antenna does help but it still does spread the signal further than omni which isnt desirable to have your wifi traffic bleeding all over the place.

You might as well just get a long cable instead.
 
What about Netgear then?

No, can't leave the server in one spot, the server has to move, and cable is really not an option.

Given the requirements, to have my wifi traffic bleeding all over the place is the only option I could think.

Do you have also any recommendations for the AP with sector antenna? Because the one I found is actually for long range and it looks quite big...
 
netgear hardware is good but you're gonna need 3 directional antenna.
A directional antenna doesnt have to be that narrow, you can narrow it to 90degrees, 60 degrees or even 30 degrees. How far does your server move? Different rooms? Different buildings? Different floors?
The server should have a very narrow directional antenna.
 
Do you mean 3 directional antenna pointing to the phone?

The server moves in a 10 meter radius and rotate 180 degrees, all this in the same area.

So right now the plan is, server with 9dB omni to AP with 19dB sector 120 degree.
 
Ok, I am rethinking about the Ubiquiti solution with that long range antenna, that is really overkill.
What do you think about this ? (Enginous Long-Range Dual band Wireless AC1750 Indoor AP / Client Bridge) I could change those 3x omni antennas that it has for the 5GHz and put 3 directional (60deg) pointing to the server...

Also I am worried about the Router-Phone side...should I do the same? I mean, put the another AP, like the same one I have for server, or should I keep it simple and use the router as a AP?
 
You only need to do it for the server because it is a server (performance reasons). Moving it 10 meters around really can be used with cables.
You use directional antennas for both the AP and client. Doesnt matter what AP it is. For example if you have an AC1900 AP and a client with asus PCE-68 you will need 6 directional antennas. Whenever you rotate your server simply rotate the antenna or use an antenna cable so you can have it fixed.
 
To not use a cable on the server is a requirement. It is really out of the picture.

So for example, would it be better to have an AP pointing 3 directional antennas than an AP with a sector 120 degree antenna?
 
Its not about more antennas being better, its about how the radios work. All antennas need to point to each other between AP and client for it to work properly for directional. More antennas just means it can differentiate noise from data better.

Dont use the sector , use directionals only with an angle that'd cover the server. Have the server's directional antennas point towards the APs antennas.
 
Thanks System Error Message, I think you are right.
So then, about the APs, then I would need an AP with at least 3 antenna connections to cover the area with three directional antenna. I talked before about the Engenius ECB1750 with 6 removable antenna (3 at 2.4GHz and the other 3 at 5GHz), also I´ve seen this Netgear EX7000 with three removable antennas (no clue if all of them are for the whole bandwidth..)
Any suggestion?
 

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