7 Feb
2021
7 Feb
'21
2:05 a.m.
On 7/2/21 11:34 am, pete M via 44Net wrote:
"Once I'm going overseas, usable bandwidth
can drop to 10 Mbps or less,
from end to end"
What a lucky man you are! If we use other software then OpenHPSDR we can get away with
using abiut 10Mb/s for one slice. SparkSDR is one of them.
That was at best, I have
seen specs between 1 and 6 Mbps between here
and Europe. Not a lost cause, but would severely limit practical SDR
bandwidths.
"The biggest challenge with high speed RF is cost and complexity. "
Cost, Ok a pair of 5.8Ghz Ubiquity radio that can do 30 KM+ high speed links will cost
around 300$ US that is not that expensive but not every can buy a pair. But we dont need
every one to be connected by RF, it would be an incitative, But not every one can do sta
tracking, Not every one can have a tilt tower with beam for HF and a 3000$ radio and amp.
At what power level? Getting a viable path to another ham from here on
tens of milliwatts at 5.8 GHz isn't exactly easy. I don't have much on
HF either, for the record, but HF investentdoes offer potential for more
use for me at this time. And I'm not sure what the cost of those
routers here is in VK. Between the exchange rate and other variables,
things can look different here.
But If we would have a nice backbone all around the planet for the 44 net and local
(national) way to connect to it, we could be able to do something like that project. But
without a backbone I dont think project like that would be possible. Try to pass 10 Mb/s
on ipip with the USCD modem and you will see that it is not possible to substain for long.
Yeah I haven't tried to push any serious data through IPIP. Keep in
mind I have no interest with the Internet side of things - too many
legal issues, once RF is involved. I'll save the Internet facing tasks
for my 44.190.8 range, which does get a lot of use.
Another issue I have with the IPIP mesh is troubleshooting. I'm not
certain I'm getting all the routes, there is a suspicious lack of routes
to subnets in the 44.0.0.0/9 range in my routing table. 44.128.0.0/10
is well represented, however.
I know that cheap vps with limted BW and Ram would not do the job. But there is a way to
scale things for sure with out spending the entire ARDC assets.
There was a baseball movie in the 80's and a voice in the movie kept saying , built
it and they will come. I am not saying that we will have hugh inflow of ham using the 44
net adress just like that out of no where. But if we keep the BW to the level of the USDC
modem on ipip we wont see much more activity then we have now.
I did try to run a ipip tunnel on ampr. I quickly figured that almost nothing that I had
insterest in would work under that infrastructure. Yes a small web server, a mail server,
maybe an Ip phone connection on a low codec. But real time voice communication at a good
quality level would suffer cut and instability very fast. SDR even with a small BW device
like the RTL-SDR would be marginal.
I've only used the IPIP for test based
communication (was on XMPP for a
while).
With such infrastructure you dont dream big. And I am
not saying that what Brian did was bad. Far from it, he had I am sure big dream for the 44
net. But he worked with what he had. The selling of an asset that had no utilisation and
would have had not much more use gave us now the possibility to dream big. He was not able
to push his vision to the max. We should not keep on waiting for something to happen. It
will not happen. Lets move, lets figure out what we will be able to do with a stronger
infrastructure and then project will come. and if we need to modify the backbone, we will
do it. There is no perfect backbone we can think of. If we wait for perfect decision,
Brain would have not make the move he did.
IPIP has been in use for a very long
time and has served us well, but
I'm sure there's something more modern that will do a better job
nowadays. Doesn't hurt to research and test alternatives.
--
73 de Tony VK3JED/VK3IRL
http://vkradio.com