Lecture1_Apps - Telecom in Society Business Motivation...

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Pratibha Menon
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Lecture 1 Introduction Motivation System and Functional models Course Structure Nature of Applications Audio Image Data Video Performance issues Delay Capacity
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Telecommunications Drivers Traffic growth: why? Increasing automation, remote access and other productivity measures. (managers optimize capacity with cost). New services: expansion of services: drop in transmission capacity prices: more new services. (late 90’s glut) New Technologies: enable cheaper/better service: eg.memory, WDM fiber. Trends (technology trends) Faster and cheaper in computing and communications Intelligent networks: eg. Networks behave like computers Internet and web : disruptive tech. Mobility: portability: adhoc network: WLANS unwired eg blackberry drivers systems ++use R&D
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Impacts on any enterprise Operational (--cost of doing business, ++productivity) Better employee communications Convergence Strategic (changes the business - ATMs) E-business – ISO-9000, JIT shipping Customer relationships
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Telecommunications Revenue 300 400 500 600 700 800 900 1000 1100 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 USD Billions Source: OECD Key ICT Indicators [www.oecd.org/sti/ICTindicators] Telecommunications sector : Revenue (USD millions)
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Convergence Multiple networks exist today Broadcast TV, Cable TV, Radio Telephone network Data networks Multiple devices with similar capabilities but providing different services Many applications, different access terminals/methods Convergence : Consolidation of several functions in one “entity” (network, device, application) Merger of distinct technologies and markets
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Convergence Mobile organizer (Blackberry/Treo)
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Levels of convergence Convergence taking place at several levels Network (VoIP) Instrument (I-Phone) Application (active phone directory) But, it’s not nearly this simple Sacrifice a lot of quality Return to this on the last day
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Introduction Drivers and Trends Telecom system model Standards Function model
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Telecom System Model Information Sources: Speech (Voice), TV, Fax, PCs Channels : Telephone lines, radio wave, optical fiber, satellite, coaxial cable, twisted pair, etc. Information Source Transmitter Channel Receiver Information user Message signal Transmitted signal Received signal Telecommunications System Course starts at the edges, with the applications
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Standards In Telecommunications Motivation Value of the network increases as the number of users of the network increases Organizations ANSI ITU (previously CCITT) ISO IEEE Read more
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Lecture1_Apps - Telecom in Society Business Motivation...

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