[HamWAN PSDR] Technical info about hamwan

Tue Oct 23 15:46:07 PDT 2018

Hi Nigel,
> 
> 
> Looks like I missed you by just a minute or two in IRC. We use what are essentially high power 5.9GHz wifi radios with directional antennas to form the network.

That’s ok, I will try to drop by tomorrow again - timezone differences are not helping ;-)
> 
> The very long distances are possible, but come from very very high gain very directional antennas with clear line of sight.
> 
> It is essentially an internet connection, though the amateur radio rules we are governed by in the united states bar encryption or use for commercial interests, so we can’t use it directly as a replacement for what you’d usually get from your local ISP. It’s two way, just like usual wifi would be.

Ah ok, I see.

> 
> 150Mbps is a bit of a yes and no, some of our backbone links that tie different cell sites together certainly do run well north of 100mbps or more. However, due to the wireless spectrum available, and power/signal strength considerations, connections to users usually max out around 10-20mbps assuming very good signals. Poorer signals will necessarily be slower than that.

Ok, that is very interesting! 

Sorry for all the questions btw ;-)

The main reason for my interest in this technology, is that our company is looking for a solution for one of our customers. They are looking for a way to bring television services into an African country. Satellite is already there, but too expensive and too limited because of available bandwidth on the transponders, DVB-T2 (comparable to ATSC) is being introduced there but getting along very slowly and also very limited in available channel space. 

Our company’s main expertise is in the OTT / IPTV field. We use p2p-assisted internet streaming technology to stream TV channels and live feeds (from events etc.) over the web. We are working currently in Egypt and Paraguay to build end-to-end OTT/IPTV platforms based on our technologies, and we are also deploying our technology currently with partners such as the German RTL, the Filmbox channels and even with NASA ;-) We try to find creative (and often disruptive) ways to reach a certain technological goal, so to speak ;-)

I remembered HAM radio and SSTV initiatives so I started looking on the web, and so I came to your project.

Theoretically, if we were to set up a similar network such as yours from scratch, in an African country, using it primarily for IP-broadcasting of TV channels (using i.e. 600 kbit/s H265 streams to reach SD quality TV images) and secondarily for internet access (i.e. restricted to 5 mbit/s), would this technology be useable?

Best regards,
Ron

> 
> Nigel
> 
>> On Oct 23, 2018, at 11:39, Ron van Herk <ron at cymtv.com <mailto:ron at cymtv.com>> wrote:
>> 
>> Hi Tom,
>> 
>> Thank you for your reply, I just visited the irc channel again but was disconnected, so let me just fire away my first questions here;
>> 
>> I am trying to grasp the concept, basically you are transmitting digital data over VHF waves, reaching distances of up to 100 miles?
>> 
>> Would this be like an internet connection, but only with one-way trafic?
>> 
>> And I read somewhere about a speed of 150 Mbit/s, is this accurate?
>> 
>> Best regards,
>> Ron
>> 
>> <image001.png>
>> 
>> Cybermedia Television BV
>> Elandstraat 108 
>> 2901 BK Capelle aan den Ijssel 
>> The Netherlands
>> Phone: +31-(0)10 30 700 21
>> Mobile: +31-(0)6 143 272 35
>> Skype      : ronaht
>> The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this information. This email is for discussion purposes only and doesn’t not represent binding arrangement unless expressly stated therein. 
>> E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. CyberMedia Television BV cannot accept liability for any errors or omissions in the contents of this message, which may arise as a result of e-mail transmission. Please note that CyberMedia Television BV may monitor, analyse and archive email traffic, data and the content of email for the purposes of security, legal compliance and staff training. CyberMedia Television BV is a limited company registered in the Netherlands with Company Registration No. 63937093.Registered Office: Elandstraat 108 , 2901 BK Capelle aan den Ijssel , The Netherlands
>> 
>>> Op 23 okt. 2018, om 16:34 heeft Tom Hayward <tom at tomh.us <mailto:tom at tomh.us>> het volgende geschreven:
>>> 
>>> Hi Ron,
>>> 
>>> I see the messages you left this morning in IRC. You can usually reach someone on IRC during the day (~9:00-22:00 Pacific time).
>>> 
>>> Or if you have specific questions already, you can post them to this mailing list.
>>> 
>>> Tom
>>> 
>>> On Tue, Oct 23, 2018 at 4:45 AM Ron van Herk <ron at cymtv.com <mailto:ron at cymtv.com>> wrote:
>>> Hi,
>>> 
>>> My name is Ron and I work with Cybermedia Television BV of The Netherlands. I am intrigued by the system you have set up and wonder if I could talk to anyone about, as I have some questions about the setup…
>>> 
>>> Would it be best to chat on the irc channel?
>>> 
>>> Best regards,
>>> Ron
>>> 
>>> 
>>> 
>>> Cybermedia Television BV
>>> Elandstraat 108 
>>> 2901 BK Capelle aan den Ijssel 
>>> The Netherlands
>>> Phone: +31-(0)10 30 700 21
>>> Mobile: +31-(0)6 143 272 35
>>> Skype      : ronaht
>>> The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this information. This email is for discussion purposes only and doesn’t not represent binding arrangement unless expressly stated therein. 
>>> E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. CyberMedia Television BV cannot accept liability for any errors or omissions in the contents of this message, which may arise as a result of e-mail transmission. Please note that CyberMedia Television BV may monitor, analyse and archive email traffic, data and the content of email for the purposes of security, legal compliance and staff training. CyberMedia Television BV is a limited company registered in the Netherlands with Company Registration No. 63937093.Registered Office: Elandstraat 108 , 2901 BK Capelle aan den Ijssel , The Netherlands
>>> 
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>> 
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> 

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