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You can run just about anything over AX.25 since it's just the data link layer in the OSI model. You could run HTTP on top of IP on top of AX.25 with TLS/SSL me
by moftz 8y ago
You can run just about anything over AX.25 since it's just the data link layer in the OSI model. You could run HTTP on top of IP on top of AX.25 with TLS/SSL message encryption turned off so you don't run afoul of FCC rules. The authentication would still be there but everything would be in the clear. You could also run IPsec with just the authentication field in the header, no encryption. Even if you didn't want to get that deep into the layers, you can always just pgp sign your messages on packet radio. Depending on the signature length, it could take several extra seconds to send the pgp signature at the typical 1.2Kb/s!
Decreasing the complexity of the stack is a good move forward. The speeds of packet radio require a custom protocol that limits overhead but leaves options for authentication and message signing. Some hams have been using packet radio at wifi frequencies which basically creates a wireless WAN with much higher data rates, making any of the authentication methods much quicker.
- souterrain 8y agoI owe my understanding of TCP/IP to running at 1200 bauds, half duplex, with poor collision detection. http://www.ka9q.net/code/ka9qnos/ http://www.ka9q.net/code/ka9qnos/
- mmirate 8y agoWouldn't they need to significantly decrease the transmission power in order to use the ISM bands, making that application more LAN than WAN? And if the result is both legal and technologically superior to existing WiFi hardware then why hasn't the IEEE picked up on it?
- moftz 8y agoOh, it's not better than normal wifi. It's just better than 1200 baud over VHF or even 300 baud over HF. It's just typical wifi hardware hooked up to high power amps and high gain antennas to get greater distance. People are adjust the frequencies to the ham band and then running mesh networks. Part 97 allows you to modify part 15 (normal wifi hardware) to put up to 10W out. 10W frequency hopping spread spectrum links can go pretty far at GHz frequencies.
- mmirate 8y agoThat merely transforms my previous question into a question of why WiFi routers+adapters with discrete antennae, don't also ship with 10W output and a suitably-beefy electrical system to match.
- leetbulb 8y agoNever thought about that. Very cool! Thank you!