Transcript Networks Now and Future

Networks Now and Future
From Ethernet to Interplanetary
Networks
Basics of networks
• Computers can talk to each other when
connected together.
• Can send files, log on, chat, send video,
audio, and much more.
• Can connect in lots of ways.
• Different networks can be connected
together: The Internet.
Traditional wired nets
• Some kind of wire connects one machine to
another.
• Can be copper (normal wire).
• Can be fibre optic.
• Doesn’t have to be internet: Windows
Networking, appletalk, and way more.
• Wire can be short, or can go for very long
distances. Especially if it’s fibre.
Global networking: TCP/IP and
ATM
• Internetworking: connecting one network to
another to get a “network of networks”
• TCP/IP, aka “The Internet”, is based on bouncing
“packets” around the world, each one finding its’
own route from one place to another. Rather
random, but simple.
• ATM, asynchronous transfer mode, based on
sending “cells” around the world. Route
determined, like a phone line. Better quality.
Routing, nameservers, and all
that
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The packets need to get somewhere.
Internet has addresses: 192.75.245.6
ATM has “connections” and addresses.
Routers move Internet packets around from one
network to another.
• Switches move ATM cells between links. Like
telephone switches.
• Nameservers let us know an address,
tharsis.polylab.sfu.ca, from the number.
Mobile nets, wireless nets
• Can transmit digital (ones and zeroes)
information via radio waves.
• Can bounce those radio waves from place to
place via repeaters, like amplifiers.
• Can transmit anything, including TCP/IP
(Internet) and ATM.
• Can connect the radio networks to the Internet.
• Can move around, and be on the net
E-commerce
• World used to be business via meetings, or via
paper.
• These days we send everything, including money,
via the network.
• In Europe, cash is vanishing. Netherlands: folks use
smart cards instead of it.
• Used to be push-based world: business came
looking for you.
• Now pull-based: you, the prosumer, go find what
you want.
M-commerce
• Wireless nets let you be on the net
anywhere
• E-commerce lets you do business, buy or
sell, anywhere on the network.
• M-commerce: convergence of the two.
• You can access everything you want from
wireless connections.
Cellphones, networks everywhere
• Cell networks: network of networks, like the
internet.
• Wireless, can support data.
• Wireless web: access to your services from the
cellphone.
• Will grow into a wide range of digital wireless
services and devices available anywhere.
• Wireless networks to rule within 2 years.
Wandering around the network
• You used to have to physically set up your
computer as you moved from one local network to
another.
• Now you’ll have the Next Generation Internet
(IPv6).
• Network will follow YOU around, over
spacelinks, over radio links, over your home
connection.
• Always “at home” or “at work”, as you choose.
Using spacecraft to talk
• Can’t get wires or radios everywhere.
• Can talk to a spacecraft, and bounce the radio
signal that way.
• Can have one big spacecraft, far away, or lots
close up: Iridium, GlobalStar, Teledesic.
• Can provide network services for an entire half of
the planet.
• Can be very cheap.
• Even your radio may use a satellite!
Talking on another planet
• Wireless technology can be deployed
anywhere
• Go to another planet, like the Moon or Mars
– Put down a wireless network
– Put down routers
– Put radio gear on the spacecraft, on the
spacesuit, on the robots, on the rovers
• Martian Internet!
Talking TO another planet
• Can send a radio wave from Earth to Mars and
back
• Can build a network connection on that: just a
big wireless net!
• Can make it REAL fast using lasers.
• Big network delays though.
• Who wants to chat with a doctor, customer
service agent, SO who takes 40 minutes to
answer?
Communicating with remote places
• Without a network, you could well be on another
planet.
• Can use space connections to anywhere in the
world.
• Who pays for them?
• Other, cheaper solutions, but long delays.
• Wireless nets cut down the cost.
• India: space comms, wireless systems, major
engineering expertise.
• Canada?
Communicating in emergencies
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Need to go somewhere we’ve never gone
Set up a network
Quickly
People could die without it
Sound familiar?
What’s appropriate?
• Network needed.
• Normal internet good? Do we need fast
connections?
• If we do, how to we get them?
• Can we scale the network, from cellphones
to broadband. Voice, maybe?
Project ideas
• ASI project proposals!
• Need help in community work: Arctic,
Africa, Northern BC.
• M-commerce surveys.
• Wireless web surveys.
• YOU name it.
Project ideas?
• WAP/WML/Wireless: M-commerce: Rick,
Celine, Trinh, Rose, Tamara, Irene, Denise,
Alanna, Joni, Chris, Mike, Chirag, Harold
• Arctic (ESA): Peter, Cecilia, David, Alanna,
Chirag, Julia
• Space links: Peter,
• East meets west: Shawna, Celine
• Wireless/voice: Shawna, Celine, Joni, Eric
• Environmental monitoring: David
More ideas
• New media growth/alternate media: David
• Empower (ESA too), NGO: Chaw, Chirag,
Trish, Julia
• Dangers: Mike, Chris, Trinh, Chirag, Harold
• Global commodity exchange: Trish, Julia
• Technology transfer: Eric