2013-09-03 - Re: [GRASE-Hotspot] Extending range

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From: rick <ri***k@ozaccess.com>
Message Hash: e0389c83a01a8acd92a8ca831cc5c9dab60e4c61c0f699eba4090ad9f29468ea
Message ID: <5225C187.7050308@ozaccess.com>
Reply To: <5225B974.1000908@radez.hr>
UTC Datetime: 2013-09-03 04:01:27 UTC
Raw Date: Tue, 03 Sep 2013 21:01:27 +1000

Raw message 

Thanks Drazen,

I should have explained my situation a bit clearer, it may have helped, 
though others may find your thoughtful response helpful.

I have an establishment about 30 meters wide by 90 meters long which is 
separated into three sections in a row, they join each other but are 
separated by double brick walls, each area is about 23 meters by 30 meters.

I'm needing to provide access in all three areas, and I'm just not 
getting trough the walls.


Thank you kindly

Rick


On 03/09/13 20:27, Drazen wrote:
> On 3.9.2013 10:48, rick wrote:
>> Hi all,
>>
>> Can someone suggest the best way to extend the range of the Grase wifi
>> network.
>>
>> Are repeaters or multiple access points via a switch the better option?
> This is the normal option. You are limited to 100m ethernet cable
> between switch and each AP point.
> You can also use better antennas on AP. This means directional antennas.
> Their diagram of Tx and Rx is nor circular then concentrated at narrow
> angle vertically and/or horizontally. Clients should be in eye of sight
> with AP antenna and their diagrams.
> For longer distances, repeater is an option combined also with
> appropriate antennas. With repeater you will have drop of theoretical
> speed by 50% in wifi channel.
> Better option then repeater is "link". You will need two devices acting
> as "link", and third device at far end connected with cable to second
> "link" device.
> It is possible to use 5GHz devices for link , you will get more speed on
> link up to +200Mbs and get distances up to 30 km or more.
>> If its multiple access points, is it as easy as plugging each access
>> point into a switch and a cable from the switch to the 2nd network card
>> in the Grase Server.?
> Yes. It is perfectly same setting as when connecting directly to server.
>> Same SSID on each access point, and separate each on a different channel?
> Yes, exactly. Just keep in mind to choose at least 3 channel apart
> between two AP if they are close to each other.
> And of course check first already occupied channels and their signals
> strength in your neighborhood. Foreign channels with weak signals at
> your area of coverage  are possible useful if no empty one available.
>> Turning off dhcp in each access ponit and turning off wds?
> Yes, DHPC definitely should be off. WDS depends of what are you building
> up as well as about the device software. Some devices need WDS to act as
> repeater or link.
> You should also assign static IP to each AP device how you can access
> them, to see what is going on, change setting if necessary or else. This
> way it is possible to access device on link segment and manage it. At
> link setup, network setting at each device need to be set as "bridge".
>
> I set static IPs at six of my  AP devices currently in the air. I used
> lower part of range: 10.1.0.2 to 10.1.0.7 . It is not a problem for
> grase/chilli DHCP to keep those reserved because all APs are always "ON"
> theoretically. Better way is to limit Grase DHCP range out of these.
> Well I didn't yet.
>
> I have one AP (Airlive outdoor with panel antenna 9dbi). One repater
> line consisting of AP with self-made 18-elements LOG-periodic antena
> (15dbi) and AP with panel antenna 9dbi. Also I have one 5GHz Link
> consisting of two Ubiquity AirGrids with parabolic antennas (25dbi) and
> Linksys DD-WRT 54GL router at end. This is 500 meters far location.
> Those LOG and Panel antennas are facing each other and they are
> aproximately 300meters away . It is interesting that both devices able
> to connect clients in own nearby because neither Tx/Rx diagram is not
> strictly directional. In nearby (say up to 30meters) of any directional
> antenna, there are always side and back RF fields which is strong enough
> for client's normal operation. This efect is used at the repeater end
> where clients are getting WiFi connection by those side emisions only,
> while main antenna direction is oriented to see far LOG antenna.
>
>
> If you need more details I will be glad to help.
>
> Regards
> Drazen
>> Thank you all...
>>
>> Rick
>>
>>
>>
>>
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