You forgot to run it down the networking stack. TCP header, IP addressing,
Physical (MAC) addressing, etc... This isn't the typical ring or star
topolgy, but some sort of a strange flat (or possibly hilly) topology.
Collision avoidance/detection would not be necessary as with some other
wireless technologies (unless the signalers are close to being in a line)
but since senders and receivers need not necessarily be physically located
at the same spot, this may not be a concern until congestion or smog becomes
a serious issue. Also remember that with a smoke signal, one need not stick
to binary encoding. Trinary or Ternary may be possible by varying the
lengths of the puffs and/or gaps, and possibly even the shape of the puff
(smoke rings, anyone?).
If they can do TCP/IP via carrier pigeon
http://www.ietf.org/rfc/rfc1149.txt we can do it via smoke signals!
On 6/14/07, Robert Oelschlaeger <roelschlaeger@xxxxxxxxx> wrote:
>
> For the entire file, or for each record of say 64 bytes, like a Motorola
> S-record file?
>
> 8-bit, 12-bit 16-bit or 32-bit? Which polynomial? CCITT-16? CCITT-32?
> preset to all 1's first? complemented at the end?
>
> Single-error detecting? Single-error correcting, double-error detecting
> Hamming code? That would add three bits per byte, I'd guess.
>
> Adding just a single parity bit to each character add about 10%, so we
> would have 4.3860 years.
>
> Adding the file checksum would be negligibly different. Adding a 16-bit
> CRC per line of 64 bytes adds 3.125%
>
> Grand total is about 4.5 years.
>
> Any other requests?
>
> Bob (aka roelsch)
>
>
>
> On 6/14/07, Enormous Richard <_rnx_@xxxxxxx > wrote:
> >
> > -
> >
> > very nice 8^)
> >
> >
> >
> > what if i wanted to add a redundancy checksum
> >
> >
> >
> >
> > ------ Original Message ------
> > *Received: *Thu, 14 Jun 2007 10:16:59 PM EDT
> > *From: *"Robert Oelschlaeger" <roelschlaeger@xxxxxxxxx>
> > *To: *geocaching@xxxxxxxxxxxxx
> > *Subject: *[GeoStL] Re: Branson Caching
> >
> >
> > 3.9873 years if you're talking 1M = 1048576 bytes :-)
> >
> > Bob (aka roelsch)
> >
> > On 6/14/07, Robert Oelschlaeger < roelschlaeger@xxxxxxxxx > wrote:
> > >
> > > I get 3.8026 years, figuring four seconds per bit, 10 bits
> > > (start/stop/8 data -- this is serial asynchronous, after all) per byte,
and
> > > 365.25 days per year:
> > >
> > > octave:1> rate=0.25
> > > rate = 0.25000
> > > octave:2> bytes=3e6
> > > bytes = 3000000
> > > octave:3> bits=10*bytes
> > > bits = 30000000
> > > octave:4> seconds = bits/rate
> > > seconds = 120000000
> > > octave:5> hours = seconds/3600
> > > hours = 3.3333e+04
> > > octave:6> days = hours/24
> > > days = 1388.9
> > > octave:7> years = days/365.25
> > > years = 3.8026
> > > octave:8>
> > >
> > > On 6/14/07, HoosierDaddy <_rnx_@xxxxxxx > wrote:
> > > >
> > > > -
> > > > i wonder how long it would take to send 3Mb via smoke signals
> > > >
> > > > ------ Original Message ------
> > > > *Received: *Thu, 14 Jun 2007 08:06:39 PM EDT
> > > > *From: *"Robert Oelschlaeger" <roelschlaeger@xxxxxxxxx>
> > > > *To: *geocaching@xxxxxxxxxxxxx
> > > > *Subject: *[GeoStL] Re: Branson Caching
> > > >
> > > >
> > > > Must be all those folks trying to escape the chain of being
> > > > shackled to their high speed DSL :-)
> > > >
> > > > On 6/14/07, Tim and Pam < timpam2mocachers@xxxxxxxxxxxxx > wrote:
> > > > >
> > > > > I wish we could leave our house unlocked. Washington is
> > > > > starting to grow like St.Charles did 20 years ago. It is scary
> > > > > to look around at the changes made in just the last 6 months L
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Tim
> > > > >
> > > > >
> > > > >
> > > > > www.tueltzen.smugmug.com
> > > > > ------------------------------
> > > > >
> > > > > *From:* geocaching-bounce@xxxxxxxxxxxxx
[mailto:geocaching-bounce@xxxxxxxxxxxxx]
> > > > > *On Behalf Of *HoosierDaddy
> > > > > *Sent:* Thursday, June 14, 2007 6:38 PM
> > > > > *To:* geocaching@xxxxxxxxxxxxx
> > > > > *Subject:* [GeoStL] Re: Branson Caching
> > > > >
> > > > >
> > > > >
> > > > > we all make choices that have consequences. just keep in mind
> > > > > all the privlidges that living in Washington provides to keep your
minds off
> > > > > the other troubles. i bet you can leave you front door unlocked
without the
> > > > > fear of a crackhead walking through it and stealing your melba toast.
No DSL
> > > > > is a small price to pay for that kind of peace of mind.
> > > > >
> > > > >
> > > > > eocaching Missouri Caches Scheduled to be Archived
http://tinyurl.com/87cqw
> > > > >
> > > > > **************************************** For List Info or To
> > > > > make _ANY_ changes, including unsubscribing from this list, click
----->
> > > > > //www.freelists.org/list/geocaching Missouri Caches
> > > > > Scheduled to be Archived http://tinyurl.com/87cqw
> > > > >
> > > >
> > > >
> > > >
> > > > **************************************** For List Info or To make
> > > > _ANY_ changes, including unsubscribing from this list, click ----->
> > > > //www.freelists.org/list/geocaching Missouri Caches Scheduled
> > > > to be Archived http://tinyurl.com/87cqw
> > > >
> > >
> > >
> >
> >
> > **************************************** For List Info or To make
> > _ANY_ changes, including unsubscribing from this list, click ----->
> > //www.freelists.org/list/geocaching Missouri Caches Scheduled to
> > be Archived http://tinyurl.com/87cqw
> >
>
>
