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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.

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Networks Now and Future


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networks now and future

Networks Now and Future

From Ethernet to Interplanetary Networks

basics of 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
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
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
Routing, nameservers, and all that
  • 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
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
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
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
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
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
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
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
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
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
Communicating in emergencies
  • Need to go somewhere we’ve never gone
  • Set up a network
  • Quickly
  • People could die without it
  • Sound familiar?
what s appropriate
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
Project ideas
  • ASI project proposals!
  • Need help in community work: Arctic, Africa, Northern BC.
  • M-commerce surveys.
  • Wireless web surveys.
  • YOU name it.
project ideas18
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
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