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Unifying Undersea Wireless Communication Using TCP/IP
Nerval's Lobster writes "Wireless and cellular networks cover beaches and extend over the ocean to ships at sea but not, so far, under the ocean. A team of researchers at the University of Buffalo believe they've solved at least the technical problem of how to push wireless networking signals for long distances through the deep ocean to connect offshore oil and gas platforms, floating and underwater tsunami sensors and other remote facilities without having to bounce signals off a satellite first. Radio waves tend to be smothered or distorted by travel through water; most ocean-based sensors use acoustic waves instead, which link sensors into underwater acoustic sensor networks (UWASN). The team designed a low-power IPv4/IPv6-compatible networking protocol that uses very low power, compresses headers, is tolerant of fragmented data and connection delays, allows bi-directional communication with (and reconfiguration of) existing underwater sensors and is compatible with standard TCP/IP networks and IP router proxies. The approach is more than a simple translation from one networking medium to another. It leaves the higher-level TCP/IP networking protocols intact, but adds an adaptation layer between the data-link layer and network layer that compresses headers, changes packet size, transmission time-out settings and other requirements to be compatible with slower underwater transmissions. The team tested the implementation using a Linux-based driver, both PC and ARM-based computers and a Teledyne Benthos SM-75 Modem. They sealed two network nodes in 40-pound waterproof cases, dumped them into Lake Erie near Buffalo and transmitted instant-messaging signals from the application IPTUX from one to the other. They were also able to transfer files using FTP from an underwater client to server."
^ subject says it.
Nobodies Prefect
Tidbits for Techs Technology Blog
It's a shitty day to be a whale.
-1 Uncomfortable Truth
more acoustic signals. Nice.
sorry
Actually not easy to find specs on this souped-up accousticoupler. All the important bits were left out, so bad article.
vborodin@roctober:~$ man ping | grep 'hop count'
vborodin@roctober:~$
Vasily: "Captain, I cannot get a hop count using ping."
Captain: "Damn. They must be close!"
NSA now has yet another headache as well as the US Navy.
US Navy nuclear submarines have been used to tap into undersea fiber cable to intercept communications from the Kremlin to his "assets" abroad.
Now, the NSA is tasking those same US Navy submarines to again tap the undersea cable to "carpet bomb download" all communications of US citizens.
An anonymous source within USN Ops said with a laugh, "every US citizen in the US is a target to be killed at some point in time when the President deems it expedient."
Well, there you have it from the "Freddy's Nightmare on Pennsylvania Avenue, D.C." :D
Isn't this just a parallel implementation to NASA's space-tuned TCP/IP stack, designed to communicate under similar conditions between objects over far longer distances?
It leaves the higher-level TCP/IP networking protocols intact, but adds an adaptation layer between the data-link layer and network layer that compresses headers, changes packet size, transmission time-out settings and other requirements to be compatible with slower underwater transmissions
Uhm, screw the crabs, shouldn't above water networks also be trying to solve the same problems??
Acoustic communication? Phrbrrrarrbrbrt! ...tssss!
One does not simply Talk into water.
Its a big understatement to say that they "tend to be smothered or distorted by travel through water". They don't travel through water.
Under the sea,
Under the sea,
There'll be no radiation,
Just horny crustaceans
Under the Sea!
There is really nothing these water-based mammals can do to preserve their sanity, at this point. And humans won't respect them unless they fucking SHOOT at us.
Let's replace the do-nothing Congress with Slashdot moderators instead.
Moderating /. posts takes longer under water.
Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
Finally, Spongebob gets dialup!
Sound travels in space? Who knew???
Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
I wonder if this can be adapted to carrier pigeon-based networks?
Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
Uhm, screw the crabs,
badimageinhead! getitout! donotwant! arrrrghhhhhhhhhh!
Someone shoot me now.
And protect it with blowfish!
Thank you, thank you, I will be here all week, and remember, download the fish!
Monstar L
After all these years the mortgage on the undersea VLF Numbers Station was finally paid off, and now this... this!!!
I deny that I have not avoided attaining the opposite of that which I do not want.
He's probably already thinking of putting a server in international waters...
Sounds like a bad idea all the way around.
"If any question why we died, Tell them because our fathers lied."
And yet another high level layer to cope with high-error-rate and slow physical layers. But the problem remains the attenuation of RF underwater. Where are the interesting details, like the carrier frequency, modulation type, bandwidth, power efficiency etc ..
Sound is a generic way of communicating between sea animals.. What would you say if you had a ping-ping-ping in your ears all day long... Regardless frequency..
Sonar is bad for wales and dolphins, but wait until you have flashmobs of zebra mussels.
SLASHDOT: news for people who can't concentrate on work or have no life at all and got tired of yelling back at the TV.
i did not know there is a need for underwater wireless communications. i learned something new. thanks for sharing