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Article #1733

Re: My robot project.

#1733
From: Alan Barrow
Date: Fri, 08 Jan 1993 00:45
26 lines
1681 bytes
Regarding buffering and packet radio, the more advanced protocols
(TCP/IP) use an algorythm that optimizes the packet size.

It tries to avoid small packets if possible, but will send them if it is
obvious that more data is not coming. (Nagel "tinygram" algorythym?)

This is discussed in the Comer TCP/IP book.

This allows both small packet (typically interactive) use as well as
large packets (file xfers, etc)

There will always be some latency, however. Even at 56k packet (which I
have connecting my unix machine at home to other ham's machines) it is
an issue, as the key up time for nearly all radios is much longer than a
typical packet. Thus any "non duplex" approach will suffer from this.

I can point you in the right directions for public domain code, etc.

Hope this helps!


 Alan Barrow  km4ba | I've seen things you people wouldn't believe. Attack
 jab@atl.hp.com     | ships on fire off the shoulder of Orion. I watched
                    | C-beams glitter in the dark near the Tannhauser gate.
 ..!gatech!kd4nc!   | All those moments will be lost in time -
         km4ba!alan | like tears in rain. Time to die.          Roy Batty
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Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!sdd.hp.com!hpscit.sc.hp.com!hpuerca.atl.hp.com!jab
References: <1993Jan4.103239.10351@dunix.drake.edu> <1993Jan4.191739.26583@n1gva> <C0HsFB.BvG@jabba.ess.harris.com> <31474@nntp_server.ems.cdc.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!sdd.hp.com!hpscit.sc.hp.com!hpuerca.atl.hp.com!jab
From: jab@hpuerca.atl.hp.com (Alan Barrow)
Subject: Re: My robot project.
Message-ID: <C0IFFM.277@hpuerca.atl.hp.com>
Date: Fri, 8 Jan 1993 00:45:21 GMT
Distribution: comp.robotics
References: <1993Jan4.103239.10351@dunix.drake.edu> <1993Jan4.191739.26583@n1gva> <C0HsFB.BvG@jabba.ess.harris.com> <31474@nntp_server.ems.cdc.com>
Organization: Hewlett-Packard NARC Atlanta
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