[Olsr-users] Using multiple radio cards

[Derek C]

Hi Victor,

Thats very interesting - it does make it awkard to build simple mesh nodes
too as they can't be self-contained.

Did you only use multiple antennas to seperate back-haul and customer
connections or did you use multiple cards to improve back-haul
performance?

thanks,

Derek


On Fri, August 8, 2008 11:21 am, Victor wrote:
> Hi Derek,
>
>
> Just note that when using multiple radio cards you will still need
> physical separation (antenna) separation between the radio cards otherwise
> they will still be interfering with each other no matter what channel you
> set them to. Mixing a and g band radios is okay and you wont need the
> physical separation because the frequencies are far enough apart. When I
> was working on this for an honours thesis I found that I needed a minimum
> of 1 meter separation between the antennas otherwise you get worse
> performance than just a single card.
>
>
>
> Victor
>
>
> -----Original Message-----
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> Today's Topics:
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>
> 1. Yippie - routing now working (due to LinkQualityLevel
> setting) (Derek C) 2. Using multiple radio cards (Derek C)
> 3. Re: Using multiple radio cards (Benjamin Henrion)
> 4. Re: Using multiple radio cards (Derek C)
> 5. Re: Using multiple radio cards (aaron)
> 6. Re: Using multiple radio cards (Derek C)
>
>
>
> ----------------------------------------------------------------------
>
>
> Message: 1
> Date: Thu, 7 Aug 2008 17:12:02 +0100 (IST)
> From: "Derek C" <(spam-protected)>
> Subject: [Olsr-users] Yippie - routing now working (due to
> LinkQualityLevel	setting)
> To: (spam-protected)
> Message-ID:
> <(spam-protected)>
> Content-Type: text/plain;charset=iso-8859-1
>
>
> NOTE: SORRY - somehow I posted my message to the olsr dev mailing list
> rather than the users one (and I'm not on the dev mailing list either).
>
>
> Hi again,
>
>
> To let you know - quite blindly I started modifying olsrd.conf settings
> to see if the routing would start working - and it paid off.
>
> I switched "UseHysteresis" to "no" and then I changed "LinkQualityLevel"
> from "0" (default) to "1" - after this, and a olsrd restart of course,
> routing came up!
>
> Actually I had avoided the LinkQualityLevel setting because I thought it
> really was "Hysteresis" OR "LinkQualityLevel" and Hysteresis sounded like a
> better system to opt for...
>
> thanks,
>
> Derek
>
>
> --
> --
> Derek C
> In Ireland
>
>
>
>
>
>
> ------------------------------
>
>
> Message: 2
> Date: Thu, 7 Aug 2008 17:40:15 +0100 (IST)
> From: "Derek C" <(spam-protected)>
> Subject: [Olsr-users] Using multiple radio cards
> To: (spam-protected)
> Message-ID:
> <(spam-protected)>
> Content-Type: text/plain;charset=iso-8859-1
>
>
> Hi again,
>
>
> On multiple radio cards:  I'm new to AdHoc networking but I know that
> AdHoc networks don't hunt for APs over different frequencies like the
> typical AP->STA type setup.
>
> I was hoping to have a dual [backbone] radio setup with one omni antenna
> and one directional antenna per node to try to allow for links with
> increased range over omni -> omni arrangements.
>
> It does seem counter-productive to me to use the same frequency for two
> individual radio cards - surely the interference would cause major
> slow-downs in communications?  (even more so than in a repeating single
> radio card setup due to re-transmissions?).  Funny though because I think
>  I've read over people's setup with two radio cards set to the same
> frequency.
>
> Does anyone have any experience or opinions on dual radio setups?
>
>
> thanks,
>
> Derek
>
>
>
>
> --
> --
> Derek C
> In Ireland
>
>
>
>
>
>
> ------------------------------
>
>
> Message: 3
> Date: Thu, 7 Aug 2008 18:57:43 +0200
> From: "Benjamin Henrion" <(spam-protected)>
> Subject: Re: [Olsr-users] Using multiple radio cards
> To: "Derek C" <(spam-protected)>
> Cc: (spam-protected)
> Message-ID:
> <(spam-protected)>
> Content-Type: text/plain; charset=ISO-8859-1
>
>
> On Thu, Aug 7, 2008 at 6:40 PM, Derek C <(spam-protected)> wrote:
>
>> Hi again,
>>
>>
>> On multiple radio cards:  I'm new to AdHoc networking but I know that
>> AdHoc networks don't hunt for APs over different frequencies like the
>> typical AP->STA type setup.
>>
>> I was hoping to have a dual [backbone] radio setup with one omni
>> antenna and one directional antenna per node to try to allow for links
>> with increased range over omni -> omni arrangements.
>>
>> It does seem counter-productive to me to use the same frequency for two
>>  individual radio cards - surely the interference would cause major
>> slow-downs in communications?  (even more so than in a repeating single
>>  radio card setup due to re-transmissions?).  Funny though because I
>> think I've read over people's setup with two radio cards set to the same
>>  frequency.
>>
>> Does anyone have any experience or opinions on dual radio setups?
>>
>
> I should publish soon my findings about multiple radio.
>
>
> Basically the more seperation in frequencies the better.
>
>
> If you want to use 2 different channels in the 2.4 band, try to use
> ch1 and ch13 or example, or at least non-overlapping channels (ex: 1-6-11).
>
>
> If you are using omnis, try also to have Hpol and Vpol for better
> seperation.
>
> In the 5gh band, use 5.2 and 5.8 in order to maximise the seperation.
>
>
> --
> Benjamin Henrion <bhenrion at ffii.org>
> FFII Brussels - +32-484-566109 - +32-2-4148403
>
>
>
>
> ------------------------------
>
>
> Message: 4
> Date: Thu, 7 Aug 2008 18:55:45 +0100 (IST)
> From: "Derek C" <(spam-protected)>
> Subject: Re: [Olsr-users] Using multiple radio cards
> To: "Benjamin Henrion" <(spam-protected)>
> Cc: (spam-protected)
> Message-ID:
> <(spam-protected)>
> Content-Type: text/plain;charset=iso-8859-1
>
>
> Hi Benjamin,
>
>
> I'm going to be using 802.11a 5Ghz (one planer & one omni).  I have a
> separate 2.4 Ghz card & omni for bandwidth supply to customer notebooks (so
> three cards total per node).
>
> The problem with any separate frequencies at all is that, as far as I can
>  see, it hobbles adhoc mesh networking altogether in that one node won't
> see any neighbors that are not on its assigned frequency.
>
> How did you approach this with multiple radio cards and frequencies?
>
>
> thanks for any information
>
> Derek
>
>
>
> On Thu, August 7, 2008 5:57 pm, Benjamin Henrion wrote:
>
>> On Thu, Aug 7, 2008 at 6:40 PM, Derek C <(spam-protected)> wrote:
>>
>>
>>> Hi again,
>>>
>>>
>>>
>>> On multiple radio cards:  I'm new to AdHoc networking but I know that
>>>  AdHoc networks don't hunt for APs over different frequencies like
>>> the typical AP->STA type setup.
>>>
>>> I was hoping to have a dual [backbone] radio setup with one omni
>>> antenna and one directional antenna per node to try to allow for links
>>>  with increased range over omni -> omni arrangements.
>>>
>>> It does seem counter-productive to me to use the same frequency for
>>> two individual radio cards - surely the interference would cause major
>>>  slow-downs in communications?  (even more so than in a repeating
>>> single radio card setup due to re-transmissions?).  Funny though
>>> because I think I've read over people's setup with two radio cards set
>>> to the same frequency.
>>>
>>> Does anyone have any experience or opinions on dual radio setups?
>>>
>>>
>>
>> I should publish soon my findings about multiple radio.
>>
>>
>>
>> Basically the more seperation in frequencies the better.
>>
>>
>>
>> If you want to use 2 different channels in the 2.4 band, try to use
>> ch1 and ch13 or example, or at least non-overlapping channels (ex:
> 1-6-11).
>
>>
>>
>> If you are using omnis, try also to have Hpol and Vpol for better
>> seperation.
>>
>> In the 5gh band, use 5.2 and 5.8 in order to maximise the seperation.
>>
>>
>>
>> --
>> Benjamin Henrion <bhenrion at ffii.org>
>> FFII Brussels - +32-484-566109 - +32-2-4148403
>>
>>
>>
>
>
> --
> --
> Derek C
> In Ireland
>
>
>
>
>
>
> ------------------------------
>
>
> Message: 5
> Date: Thu, 07 Aug 2008 20:36:24 +0200
> From: aaron <(spam-protected)>
> Subject: Re: [Olsr-users] Using multiple radio cards
> To: Derek C <(spam-protected)>
> Cc: (spam-protected)
> Message-ID: <(spam-protected)>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
>
>> How did you approach this with multiple radio cards and frequencies?
>>
>>
>
> I would just use multiple cards / radios in that case.
>
>
> a.
>
>
>
>
> ------------------------------
>
>
> Message: 6
> Date: Thu, 7 Aug 2008 20:42:16 +0100 (IST)
> From: "Derek C" <(spam-protected)>
> Subject: Re: [Olsr-users] Using multiple radio cards
> To: "aaron" <(spam-protected)>
> Cc: (spam-protected)
> Message-ID:
> <(spam-protected)>
> Content-Type: text/plain;charset=iso-8859-1
>
>
> Hi again Aaaron,
>
>
> On single radio [backbone] mesh systems - part of the advantage to the
> adhoc / olsrd network is that the nodes "see" all nearby neighboring nodes
>  so can route via them as necessary.  This must be necessary (important
> anyway) for routing via new (better signal / less hops) nodes as they
> appear and for resilient links.
>
> If two radio cards are used and two channels are used then nodes would
> have to be programmed with the channel to use (per radio card, etc) as they
> are going out for installation but without any automated channel selection
> it would be just like having separate olsrd networks wouldn't it?
>
> Before dabbling olsr I was trying out my own perl based scripts to find
> neighbors - I was using AP and STA cards (not adhoc networking) but this
> was flawed because I couldn't work out safe routes to gateway nodes (only
>  routes to nearby strong signal neighbors) but in a way it was good
> because I always had unique frequencies.
>
>
> If you are using separate radio cards and separate channels would you
> just manually structure your "hybrid" network or is there any other
> intelligent options?
>
> thanks for any information
>
> Derek
>
>
>
>
>
> On Thu, August 7, 2008 7:36 pm, aaron wrote:
>
>>
>
>>> How did you approach this with multiple radio cards and frequencies?
>>>
>>>
>>>
>>
>> I would just use multiple cards / radios in that case.
>>
>>
>>
>> a.
>>
>>
>
>
> --
> --
> Derek C
> In Ireland
>
>
>
>
>
>
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-- 
--
Derek C
In Ireland