internet and intranet developments for the ufi n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Internet and Intranet Developments for the UfI PowerPoint Presentation
Download Presentation
Internet and Intranet Developments for the UfI

Loading in 2 Seconds...

play fullscreen
1 / 22

Internet and Intranet Developments for the UfI - PowerPoint PPT Presentation


  • 196 Views
  • Uploaded on

Internet and Intranet Developments for the UfI. Professor Paul Bacsich. Head of the Virtual Campus Programme. UfI, 22-23 October 1998. The Requirement (2002) from a customer viewpoint. To connect 2.5 million enquirers per year occasionally to UfI Info Services

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Internet and Intranet Developments for the UfI


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
internet and intranet developments for the ufi

Internet and Intranet Developments for the UfI

Professor Paul Bacsich

Head of the Virtual Campus Programme

UfI, 22-23 October 1998

the requirement 2002 from a customer viewpoint
The Requirement (2002)from a customer viewpoint
  • To connect 2.5 million enquirers per year occasionally to UfI Info Services
  • To connect 600,000 learners per year on a more permanent basis to organised programmes of learning
  • These parameters define the scale of the Network
some requirements 2005
Some requirements (2005)
  • 200,000 people per year in Basic Skills - via Learning Channels, DVD and WebTV?
  • 200,000 people per year in ICT - via PCs, CD-ROMs and Internet?
  • 100,000 start-ups and 50,000 SMEs - low-cost low-bandwidth temp. connections?
  • 500 multimedia companies - MANs?
  • These parameters further help to define the types of Subnetworks
networks
Networks

Ways of linking people to people and resources

parameters of networks
Parameters of networks
  • Bandwidth/speed/bit rate
  • Distance (cf. twisted pair)
  • Quality of Service: latency, jitter etc
  • Coverage
  • Mobility
  • COSTS
speed of networks bit s
Speed of networks (bit/s)

0,000,032,000 - modems, dial-up data

0,000,064,000 - speech, audio

0,000,128,000 - quasi-video, music

0,002,000,000 - good video, WANs

0,010,000,000 - Ethernet (old)

0,100,000,000 - ATM, Ethernet, MANs

1,000,000,000 - in labs and dreams

More bandwidth  Better education

internet 2000 there and stable
Internet: 2000there and stable
  • From nerdy&US to potentially ubiquitous information highway world-wide
  • Available dial-up in most developed countries, no time charge
  • Leased lines typical 64 kbit/s to 2 Mbit/s
  • Also on mobile networks but slower
  • Some use via satellites (cf. JANUS)
  • Marvellous self-extending (plug-ins) and self-enhancing (IPv6) powers
access from home and smes
Access from home and SMEs
  • Modems: 33.6 or 56 kbit/s
  • ISDN=Home Highway: 64 or 128 kbit/s
  • ADSL over copper: 2 Mbit/s
  • Cable modems, share of 10 Mbit/s
  • Radio, mobile
  • Satellite, digital TV
  • Other minority systems, eg power lines
modems
Modems
  • Routinised at 28.8 or 33.6 kbit/s
  • Stretched to 56 kbit/s by various methods
  • “End of the road” - no better in 2005
isdn home highway v1
ISDN - Home Highway (v1)
  • Big advantage - uses phone line (digital)
  • 64 or 128 kbit/s
  • Telephone tariffs
  • But not much faster than modems
  • At last, quite simple and cheap
  • In reality an old technology - 20 years
  • Wrapped in politics
adsl blip now relevant from 2002
ADSL - blip now, relevant from 2002
  • Big advantage - uses phone line
  • Asymmetric: 64+ kbit/s up, 384+ down
  • Where Home Highway should be now and will be by 2002
  • Many US trials or quasi-services, some European trials
  • Potentially UK-wide (rural lines?)
  • But tariffing dilemmas
  • May kill “true” ISDN stone dead
cable modems good theory relevant by 2002 in cities
Cable modems - good theory, relevant by 2002 in cities
  • Good in theory: “just” broadband Ethernet over coaxial cable TV
  • Reality is much harder
  • Many US services
  • Several European trials
  • Problem: is this an interim technology?
  • Tariffing, again
  • Tends to be city-oriented
radio 2002 but only blip mobile 2002 but costly
Radio: 2002 but only blip? mobile: 2002 but costly
  • Fixed link
    • Ionica etc
    • Little used for data as yet
    • Obscure future?
  • Mobile
    • GSM - slow but a data service
    • UMTS: much faster, still R&D phase and EU lobby: 2002
    • Very active research area - ACTS
satellite 2000 never for large scale use
Satellite:2000&never for large-scale use
  • One-way:
    • Return is usually terrestrial
    • First service was Hughes DirecPC
    • Now Eutelsat/BT and others
    • Relevant from 2000, but niche for England
  • Two-way: VSAT
    • mostly still R&D phase: ACTS etc; suspect in UK context even in 2002
    • dreams of “USAT” in studies: 2005?
digital broadcasting 2000
Digital broadcasting: 2000
  • Hybrid Internet via DB and phone lines
  • Attractive in theory, not so popular with engineers (cf satellites)
  • Scalable?
  • Perhaps more oriented to information distribution than “true” Internet
  • Central to some UfI audiences by 2002
power lines
Power lines
  • Communication over power lines goes back to “carrier current” of 1940s
  • Problems are noise and transformers
  • Destined to remain a minority system - technically harder than phone lines; unless regulatory distortions re-intrude
atm over fibre to the home 2005
ATM over fibre to the home?>2005
  • Foreseen over 10 years ago- Mackintosh studies
  • Will be a long time until every UK home has a fibre connection and ATM
  • And high cost to get there
  • Thus “interim” solutions (so-called by engineers) remain important for years
  • Still not there universally in 2005
conclusions enough to be going on with
Conclusions“Enough to be going on with”
  • IDSN and ADSL - existing copper
  • Cable modems use “existing” cable
  • Radio and satellite - remote areas
  • Digital data broadcasting - good potential, but scalability?
  • Tariffs and protection of existing services are the main problems (for suppliers)
  • Long term outlook is bright for purchasers of network services
further study
Further study
  • ADSL Forum - http://www.adsl.com
  • Information also at http://www.xdsl.com/
  • Cable Modems - http://www.catv.org/
  • ACTS information site (from InfoWin) http://www.infowin.org
  • Telecoms Virtual Library - http://www.analysys.com/vlib/
issues
Issues
  • Technology issues
  • Pedagogic issues
  • Organisational issues
  • National issues
  • International issues - regulatory etc
acknowledgements
Acknowledgements
  • EU ACTS - for InfoWin work
  • EPSRC - support of IGDS course on “Networked Information Engineering”http://www.shu.ac.uk/schools/cms/nie/
  • An earlier version of this presentation was given at the European School Net launch
thank you for listening
Thank you for listening

Paul Bacsich

Professor of TelematicsHead of Division of Computing & Networks

Head of the Virtual Campus Programme