Re: Looking for RFC layer 3 on layer 2

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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 

Sent from ProtonMail Mobile


On Sun, Feb 25, 2018 at 18:58, Miles Fidelman <mfidelman@xxxxxxxxxxxxxxxx> wrote:

On 2/25/18 5:27 PM, Warren Kumari wrote:

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 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.

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

[Index of Archives]     [IETF Annoucements]     [IETF]     [IP Storage]     [Yosemite News]     [Linux SCTP]     [Linux Newbies]     [Mhonarc]     [Fedora Users]

  Powered by Linux