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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!udel!gvls1!faatcrl.faa.gov!faatcrl!jprad
- From: jprad@faatcrl.faa.gov (Jack Radigan)
- Newsgroups: comp.sys.amiga.datacomm
- Subject: Re: One way data transfer
- Date: 20 Nov 1992 07:56:46 -0500
- Organization: FAA Technical Center, Pomona, NJ
- Lines: 21
- Distribution: world
- Message-ID: <jprad.722263944@faatcrl>
- References: <1992Nov19.160809.23332@decuac.dec.com>
- NNTP-Posting-Host: faatcrl.faa.gov
-
- bell@vfovax.enet.dec.com () writes:
-
- >Ok, now the fun part. Let's say that the receiver can only listen. As
- >in, cannot send back CRC checksums etc. to verify that it received the
- >data properly. It can only listen.
-
- >What's the best way to send the data from the transmitter so that the
- >receiver has a real good chance of receiving with no errors?
-
- >I mean, what techniques exist for sending one-way data to ensure no errors?
-
- Try digging around a technical book store that has a decent telecomm section.
- If you can find some info on FEC (forward error correction) protocols, like
- Hamming and such, you're on your way. These kinds of protocols are used in
- deep space satallite transmissions where turn-around times would make the
- data transfer intolerably long.
-
- Now for the bad news. FEC's add a lot of overhead to the protocol, which
- makes them impractical for modem use.
-
- -jack-
-