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Wireless Access point / Repeater

Last response: in Wireless Networking
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May 18, 2013 7:16:14 PM

Hi I need some help - Im trying to distribute my internet connection to the bottom of my property (about 500 ft) I want to do this in 3 hops >>ISP router >>cat 5>> WDS-AP >> Repeater - AP -WDS ?? >> Repeater. So my question is can I do this ? can I daisy chain repeaters ? or is there something else I need to do ?

very bad drawing here http://i39.tinypic.com/2b4hah.jpg

Thanks
ALan
a c 127 F Wireless
May 18, 2013 7:53:52 PM

Not with simple repeaters. First even a single repeater will cut your speed in 1/2. Next you are try to really push the distance limits on these so its unlikley you will get good results.

I would use outdoor bridge devices. There are a number of models and ways to do this. I have used this brand with good results.
http://www.ubnt.com/airgrid

These cost about $60 each and they will easily go 500ft. Documentation says 30km but that I don't believe. There are many other brands of equipment that likely work as well I just have not used them. Pretty much what you are looking for is a directional antenna with the electronics built into the antenna.
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May 18, 2013 7:58:14 PM

My thing is that I want each hop to act as an access point too - If it were just point to point that would work great but I need to allow wifi across the property. why does a repeater cut the signal in half ?

How about WDS-AP >> WDS AP >> WDS AP ?? Im looking at the engunius ENH200EXT

bill001g said:
Not with simple repeaters. First even a single repeater will cut your speed in 1/2. Next you are try to really push the distance limits on these so its unlikley you will get good results.

I would use outdoor bridge devices. There are a number of models and ways to do this. I have used this brand with good results.
http://www.ubnt.com/airgrid

These cost about $60 each and they will easily go 500ft. Documentation says 30km but that I don't believe. There are many other brands of equipment that likely work as well I just have not used them. Pretty much what you are looking for is a directional antenna with the electronics built into the antenna.


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a c 127 F Wireless
May 19, 2013 2:24:14 AM

I do not know the details of those units but I suspect they suffer from the same issue as any repeater.

The reason it cuts it in half is exactly in the definition of what it does. It resends out the signal so at a very minimum it is you have 2 times the data. Then unless you use units that have 2 radios which none of the WDS things do you are retransmitting the data on the exact same channels as the original signal. Since wireless is half duplex only a single device can transmit at a time but there is little control of who transmits. So now you have even more radio traffic stomping all over itself. When you add a second repeater it get exponentially worse. Then you have the problem of the end stations will transmit over the top of each other now since they cannot hear each other directly and only the repeaters can hear them. This also makes the problem of data corruption worse.

Too many people think there are these magically devices called wireless extenders.

engunius does sell outdoor ap/repeaters with multiple radios but I do not think the ones you link are those. The way this can work is the AP use 1 channel to form a backhaul link to the main site and then a second channel to talk to the end uses. If both your remote sites could talk to the main site on one radio channel and to the end uses on another it should work ok but these device tend to be a little expensive. Now if you need to still go main site-remote1-remote2 You will need even more radio channels. The remote1 site would need a radio to the main a radio to the remote2 and a radio to the users. Maybe you could move your central site to the first remote site.

Although it seems simple your requirements are actually quite complex...why RF engineers get paid big dollars to design cell tower systems.
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