3 ms·
100% of current data from deep space uses FEC, so you're asserting that his brief answer says that we should stop doing the usual stuff? Tough crowd.
by greglindahl 9y ago
100% of current data from deep space uses FEC, so you're asserting that his brief answer says that we should stop doing the usual stuff? Tough crowd.
- jessriedel 9y agoMy question is an honest attempt to understand, not a veiled criticism. I don't know what FEC or the usual stuff is.
- greglindahl 9y agoForward Error Correction involves sending extra data in the initial transmission so that most errors can be corrected without needing a resend. It sounds like that's what you were attempting to describe in your comment. https://en.wikipedia.org/wiki/Forward_error_correction https://en.wikipedia.org/wiki/Forward_error_correction FEC is usually used in addition to resending.
- jessriedel 9y agoThanks! If FED is standard for deep space and Musk know this (both reasonable), do you have any idea what he might have meant by "then do a batch resend of the CRC-failed packets"? Is it just that guaranteeing zero packet losses has a large overhead (surprising to me), so that the optimal FED protocol in deep space does in fact include a bit of resending?