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C01-Introduction - Mobile Communications Summer Term 2011...

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1.1 Prof. Dr.-Ing. Jochen H. Schiller www.jochenschiller.de MC - 2011 Mobile Communications Summer Term 2011 Freie Universität Berlin - Computer Systems & Telematics Prof. Dr.-Ing. Jochen H. Schiller www.jochenschiller.de [email protected]
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1.2 Why Mobile Communications? Largest SW/HW/networked system Largest number of subscribers Mobile devices dominate the Internet Mobile applications dominate Internet usage New possibilities, new threats Technology fully integrated into everybody's life almost 24/7, almost anywhere Prof. Dr.-Ing. Jochen H. Schiller www.jochenschiller.de MC - 2011
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1.3 Prof. Dr.-Ing. Jochen H. Schiller www.jochenschiller.de MC - 2011 Overview of the lecture Introduction Use-cases, applications Definition of terms Challenges, history Wireless Transmission Frequencies & regulations, Cognitive Radio Signals, antennas, signal propagation, MIMO Multiplexing, modulation, spread spectrum, cellular system, SDR Medium Access SDMA, FDMA, TDMA, CDMA CSMA/CA, versions of Aloha Collision avoidance, polling Wireless Telecommunication Systems GSM, HSCSD, GPRS, DECT, TETRA, UMTS, IMT-2000, LTE Satellite Systems GEO, LEO, MEO, routing, handover Broadcast Systems DAB, DVB Wireless LANs Basic Technology IEEE 802.11a/b/g/…, .15, Bluetooth, ZigBee Network Protocols Mobile IP Ad-hoc networking Routing Transport Protocols Reliable transmission Flow control Quality of Service Support for Mobility File systems, WWW, WAP, i- mode, J2ME, ... Outlook
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1.4 Prof. Dr.-Ing. Jochen H. Schiller www.jochenschiller.de MC - 2011 Mobile Communications Chapter 1: Introduction A case for mobility – many aspects History of mobile communication Market Areas of research
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1.5 Prof. Dr.-Ing. Jochen H. Schiller www.jochenschiller.de MC - 2011 Computers for the next decades? Computers are integrated (95% embedded systems!) small, cheap, portable, replaceable - no more separate devices Technology is in the background computer are aware of their environment and adapt (“location awareness”) computer recognize the location of the user and react appropriately (e.g., call forwarding, fax forwarding, “context awareness”)) Advances in technology more computing power in smaller devices flat, lightweight displays with low power consumption new user interfaces due to small dimensions more bandwidth per cubic meter multiple wireless interfaces: wireless LANs, wireless WANs, regional wireless telecommunication networks etc. („overlay networks“)
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1.6 Prof. Dr.-Ing. Jochen H. Schiller www.jochenschiller.de MC - 2011 Mobile communication Two aspects of mobility: user mobility: users communicate (wireless) “anytime, anywhere, with anyone” device portability: devices can be connected anytime, anywhere to the network Wireless vs. mobile Examples stationary computer notebook in a hotel wireless LANs in historic buildings Personal Digital Assistant (PDA)
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