Thanks for all the great links. I am reading parts of the RFCs and reading about the ham usages with AX.25/FX.25 and AMPRnet.org.
My confusion about how this all works is how do IP address get mapped into a broadcast radio graph and how each node processes data sent over the radio. I.E. given 10 transceivers transmitting and receiving on a given frequency band, how to construct a network of IPs for point-to-point channel communications?
I understand at this layer, I think...sort of... a path is used of shorter links to support destinations in different subnets.
I am very curious to learn how IPs do P2P on a radio network. Is routing involved? It must be with gateways. Anyways, any help to my understanding is most welcome.
Thank you,
Robert
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On 2/25/18 5:27 PM, Warren Kumari wrote:
You might want to start here - https://www.ampr.org (All about Amateur Radio Digital Communications). AMPRnet, net 44, is allocated to ham radio IP networking. There's a wiki and discussion list that might be a good start.On Sun, Feb 25, 2018 at 12:33 PM, Robert <robert.withers@xxxxxxxxxxxxxx> wrote:I am thinking about how a protocol could be written to talk over ham radios and am unfamiliar with transmissions supporting a network. I am working on ReedSolomon encoding to provide forward error correction to transmissions. I am looking to learn more.Yeah, as Charlie said, this is a large subject -- I suspect that you'll be much better off looking at some of the existing packet radio stuff, like: http://wb8nut.com/digital/ http://hfradio.org.uk/html/digital_modes.html http://www.hamuniverse.com/hfdigitalmodessoftware.html https://www.amazon.com/Amateur-Packet-Protocol-Version-October/dp/0872590119/ref=sr_1_11?ie=UTF8&qid=1519597417&sr=8-11&keywords=ham+packet (this is the book referred to by RFC1226, one of the shortest RFCs ever :-)) https://www.amazon.com/dp/B01N9AZR2Y/ref=sspa_dk_detail_0?psc=1 and adapting it. There is a small group of IETF hams, but it isn't very active.
You might also want to check out AX.25 - a data link layer used by the Amateur Radio community, and FX.25, which adds forward error correction. https://en.wikipedia.org/wiki/FX.25_Forward_Error_Correction
Another good reference: http://www.tapr.org/pr_links.html
Miles Fidelman
-- In theory, there is no difference between theory and practice. In practice, there is. .... Yogi Berra
