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32 posts

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# 108888 7-Sep-2012 18:14
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This has a range of 10km using the TV white space channels.


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  # 682925 7-Sep-2012 19:53
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No





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  # 682929 7-Sep-2012 20:22
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Nope as the 700Mhz spectrum is coming up for auction next year

 
 
 
 


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  # 682952 7-Sep-2012 21:51
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Disruptive wireless is not ok.

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  # 682989 8-Sep-2012 07:25
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Jonathan Brewer did a talk regarding whitespace freq's at NZNOG.

You can see his report he wrote @

http://internetnz.net.nz/system/files/pages/2012/telco2_whitespace_study_community_examples_final.pdf

and explains 802.22 pretty well in regards to NZ



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  # 683037 8-Sep-2012 10:53
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thank you all for the replies and the very interesting link to the paper.


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  # 683058 8-Sep-2012 12:17
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LennonNZ: Jonathan Brewer did a talk regarding whitespace freq's at NZNOG.

You can see his report he wrote @

http://internetnz.net.nz/system/files/pages/2012/telco2_whitespace_study_community_examples_final.pdf

and explains 802.22 pretty well in regards to NZ

An excellent paper; thanks very much for posting the link.  Apparently the author was the founder of Araneo Wireless.





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  # 683139 8-Sep-2012 17:02
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oxnsox: Disruptive wireless is not ok.


Yet the paper quoted seems to sing it's praises. Can you explain your reasoning?

 
 
 
 


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  # 683403 9-Sep-2012 14:20
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oxnsox: Disruptive wireless is not ok.


So why not?

johnr: Nope as the 700Mhz spectrum is coming up for auction next year


Having read the very interesting paper, it would seem that the 700MHz spectrum isn't involved in TVWS. So could you expand on your statement please?

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  # 683677 10-Sep-2012 08:33
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That is an excellent paper with good analysis just short of actual radio surveys.

A couple of questions... While you can demonstrate on paper some areas are unlikely to be disrupted by white space frequencies, you would need to prove it. The burden of non-interference falls on to the new user (typically). So real radio studies would be required. Plus if spectrum holders get worried about losing spectrum if they don't use it, they'll find ways to broadcast silly things just to keep the spectrum. The paper demonstrates the value of shared use, but what is immediately legal/available didn't jump out at me. It seems to imply that it should be okay, but I would like to hear more. Are there any labs up? Perhaps a small demo?

The idea looks worth further study to me.




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  # 683689 10-Sep-2012 08:47
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Looks like a technology which would well suit NZ's topography in many areas. They keep discussing mains power requirements. Is it not a possibility to use solar, wind etc. considering the max power usage they were talking about was 25w?




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  # 683812 10-Sep-2012 13:09
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Zeon: Looks like a technology which would well suit NZ's topography in many areas. They keep discussing mains power requirements. Is it not a possibility to use solar, wind etc. considering the max power usage they were talking about was 25w?


I don't really no much about solar power but 25W is quote a lot isn't it? I know plenty of wifI repeaters run off solar but most of them wouldn't even have 1W of transmit power. I'm sure you could ruin bigger transmitters off solar but the battery for it would be fairly sizeable hence why they have looked mains powered sites. That is my thinking towards it any way. Don't know how right I am lol

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  # 684226 11-Sep-2012 09:17
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chevrolux:
oxnsox: Disruptive wireless is not ok.


Yet the paper quoted seems to sing it's praises. Can you explain your reasoning?


My comment was meant in a literal sense.

In the wider context, I find the use of the term 'Disruptive', when applied to technology changes/advances to be a wrong descriptive. Because anything that causes change can be argued to be disruptive... and soo (in this context) all wireless advancements and technologies could therefore be described as 'disruptive'.

I don't have an issue with using whitespace, although given that the use of radio spectrum in NZ is license controlled it seems it would be necessary to control who has access to the whitespace and that they be regulated thru licencing. Ultimately you're preventing a proliferation of services into whitespace becoming disruptive to each other.

And thanks to the person who posted the link.

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  # 685273 13-Sep-2012 00:45
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1) These boxes havent been approved in NZ
2) The FCC and Ofcom have just approved trials of white space broadband devices.
These devices need to contact the FCC and ofcom databases so they can find out what channels are avaliable to use in an area.

3) To power a 25 watt device (power consumption, not transmitter power) would require a very large solar array and battery bank costing close to $8k
Solar has come down in price alot over the last few years but 25 watts is alot of power consumption. The most powerful radios we use on our rural network have a transmit power of 0.25 watts but still use 8 watts because they need to run the cpu and other functions.

- These devices are illegal in new zealand unless approved by radio spectrum management. We typically wait for countries like Australia and the USA/UK to sort out their spectrum, and then wait a little longer for the radio industry to settle on a technology before we make decisions on how we allocate the spectrum here. So it may be that in the USA, 300-500mhz devices become popular so Radio Spectrum Managment will allocate that.

Unlike what they did with the 900mhz - sold the lower 900mhz band to vodafone/belsouth and placed the mid 900mhz band under a general user license. Then in the US, they put the lower 900mhz band into a general user license and the market developed heaps of broadband radios that use the lower band. In NZ, most of these radios wont work, except some which allow a 5mhz channel width on a single channel where the upper general user area of the USA's general user band overlaps with our general user band. This means to use the 900mhz broadband radios that are avaliable on the international market would require using them in a mode that slows them down - and if you get any interference they cant change channel without causing vodafone issues.

So i hope we continue to wait before RSM does anything with our whitespace so that we align ourselves with the industry and so spectrum can be used, rather than giving us general user spectrum with hardly any devices to actually use it.

ramble over.





 




Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

There is no place like localhost
For my general guide to extending your wireless network Click Here




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  # 685274 13-Sep-2012 00:52
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Oh By the Way

One of the communities in the discussion document - Pourere

Taylor Communications has asked the community around Pourere beach if they wanted broadband - we were going to build it to them last year. No one contacted us from the flyers and roadside signs so we abandoned the project.

I stay at a bach out there and so was pretty keen to build a business case for it.




Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

There is no place like localhost
For my general guide to extending your wireless network Click Here




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