At DCC this year we announced our intention to develop a new open-source Link Protocol and Modem specifically for high speed Amateur Radio Networking.
Preliminary Specifications, 100kHz Channel, 70cm band:
- 4FSK or QPSK Modulation (2bits/symbol) up to 170kbps*
- Forward Error Correction (FEC)
- Automatic Repeat reQuest (ARQ)
- IPv6 Friendly
- Support for TCP, UDP and RTP
- Designed to work with Ad-Hoc Networking
In addition we will scale this down to 42.5kbps in a 25kHz Channel.
This will be a modular design to allow for experimentation with different modems and FEC and have built-in negotiation so nodes with different capabilities can achieve optimal communications.
This is a clean sheet design after reviewing all of the available open standards. Remember, this is a hi-speed data mode not a narrow band voice mode like D-STAR DV, DMR, P25 etc. We expect a lot of user feedback, testing and changes next year before this becomes any kind of Amateur Radio Standard.
We are in discussions with TAPR to act as the keeper of the spec as they do for AX.25 and will have a formal announcement at Pacificon next month.
Your feedback is requested, please post your questions and comments on the Yahoo Groups forum.
*see separate post: ARRL Moves to Kill Speed Limit