Re: Cape Town TV White Spaces trial

Thanks for this informative response, William.

Steve

On Tue, 2 Apr 2013, William Stucke wrote:

>   Hi SM (who you?),
>   Some useful links have been provided.
>   While I'm not a spokesman for anyone in this matter, or on this list, I
>   could make the following observations: -
>   1 The radio protocol used is proprietary to the radio manufacturer.
>   This isn't too important at this stage, as the focus on "TVWS" is about
>   determining which spectrum can be used without causing interference,
>   rather than how good the communication itself is, IMHO.
>   2 The DB operates on a geo-location basis, rather than actively sensing
>   in terms of "Cognitive Radio" principles
>   3 ICASA and Sentech have supplied Google with data on what spectrum is
>   supposed to be used where (TX power, antenna height, location, angle,
>   type, etc.) Google have analysed this (not a trivial task, in contrast
>   to someone's "face palm" comment on a TechCentral article), which
>   involves carrying out Propagation Modelling for every transmitter
>   within several hundred km on every frequency used, to determine which
>   frequencies ought to be available. The CSIR then carried out field
>   tests to confirm these results. Based on this, various channels were
>   chosen for tests
>   4 The various broadcasters are very much involved, as they are the most
>   likely recipients of complaints about interference.
>   5 Not sure what you mean by "type of Internet access", but TENET has
>   provided a fairly fat pipe to Tygerberg Hospital, where the Base
>   Station is located. Each school has an existing ADSL connection, so
>   that they are not dependent on a test connection which is by definition
>   is not reliable - it's a test.
>   6 The speed test that I witnessed at a school showed about 5.5 Mbps
>   down and 1.5 Mbps up. This wasn't the point, as it's a function of the
>   radio access protocol used, which can obviously be improved as a
>   separate issue to the TVWS trial.
>   7 Regulatory issues are still to be resolved. It's hoped that the
>   outcomes of this trial will assist with this.
>   Kind regards,
>
>   William Stucke
>   -----Original Message-----
>   From: [1][email protected]
>   [mailto:[email protected]] On Behalf Of Joe Botha
>   Sent: 29 March 2013 09:09 AM
>   To: [2][email protected]
>   Subject: Re: [IOZ] Cape Town TV White Spaces trial
>   Hi SM >@2013.03.28_21:52:14_GMT+0000
>   [3]http://en.wikipedia.org/wiki/IEEE_802.22
>   > At 04:56 28-03-2013, William Stucke wrote:
>   > >What do you want to know, over and above what's at those various
>   links?
>   >
>   > I am interested in:
>   >
>   > - the protocol used for the test
>   >
>   > - the database location
>   >
>   > - the terms and conditions for the regulatory domain
>   >
>   > - the type of Internet access for the devices (from a protocol
>   > perspective)
>   >
>   > Regards,
>   > -sm
>   >
>   >
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>   Swimmingly
>   Joe
>   "..all progress depends on the unreasonable man."
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> References
>
>   1. mailto:[email protected]
>   2. mailto:[email protected]
>   3. http://en.wikipedia.org/wiki/IEEE_802.22
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