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    Add as FriendIntroduction to Mobile Computing

    by: Rogers

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    1 : Introduction to Mobile Computing CNT 5517-5564 Dr. Sumi Helal Computer & Information Science & Engineering Department University of Florida, Gainesville, FL 32611
    2 : Fantastic Breakthrough Technology Wireless communication networks multiple networks “covering” the globe wold-wide deregulation and spectrum auctions standard communication systems and air link interfaces Portable information appliances laptops, notebooks, sub-notebooks, and MNCs hand-held computers PDAs and Smartphones Internet: TCP/IP & de-facto application protocols ubiquitous web content
    3 : New Forms of Computing Wireless Computing Nomadic Computing Mobile Computing Ubiquitous Computing Pervasive Computing Invisible Computing Distributed Computing (Client/Server)
    4 : Mobile Computing Using: small size portable computers, hand-helds, MNC, and other small wearable devices, To run stand-alone applications (or access remote applications) via: wireless networks: IR, BlueTooth, W-LANs, Cellular, W-Packet Data networks, SAT. etc. By: nomadic and mobile users (animals, agents, trains, cars, cell phones, ….)
    5 : Nomadic, Mobile & Ubiquitous
    6 : Another View of Ubiquitous Computing Mark Weiser’s views
    7 : Impressive Wireless Infrastructure! In-Room (BlueTooth)
    8 : Wireless Communication Technology
    9 : Wireless Network Convergence2G/3G Mobility-Bandwidth Trade-off Mobility Bandwidth 10K 100K 1M 10M 100M 1G Room Global GSM D-AMPS/IS-95 DECT DECT DECT WLAN UMTS National Regional Metropolitan Campus Office 1-7 GHz 0.1-2 GHz 0.1-2.3 GHz 2-4 GHz 2-7 GHz >2 GHz 20-50 GHz
    10 : Wireless Network Overlay
    11 : GSM Base Stations in Europe Nokia PrimeSite Ericsson RBS 2000 September 1997
    12 : UMTS: Universal Mobile Telecomm. Standard Global seamless operation in multi-cell environment (SAT, macro, micro, pico) Global roaming: multi-mode, multi-band, low-cost terminal, portable services & QoS High data rates at different mobile speeds: 144kbps at vehicular speed (80km/h), 384 kbps at pedestrian speed, and 2Mbps indoor (office/home) Multimedia interface to the internet Based on core GSM, conforms to IMT-2000. Deployment as early as 2002.
    13 : Apple’s Newton 1987
    14 : The Palm 1990
    15 : Motorola Marco 1995 1995 Specs Newton OS 1.3 4MB ROM 687KB Flash RAM 320x240 Monochrome LCD resistive touchscreen RS422 serial port Localtalk support 1 PCMCIA Slot (5V or 12V) 1 Sharp ASK infrared port 4 AA batteries, rechargeable NiCd batteries may be used First released January 1995 It weighs 1.8 pounds and is 7.5 inches high, 5.8 inches wide and 1.4 inches deep Street price:  USD 900-1400
    16 : Motorola Envoy 1996
    17 : The Pocket PC 1998
    18 : The Nokia 9000 Communicator 1996
    19 : The Hand-Held Computer: Sharp Zaurus 1998
    20 : The Vadem Clio: Hand-Held?, Tablet? Other? 1999
    21 : The Tablet PCFujitsu Stylistic 2300/3400 2002
    22 : Laptops, Notebook, Sub Notebooks & Netbooks Laptops: 1991 Notebooks: 1996 Netbooks: 2006
    23 : The First Wrist PC: Ruputer
    24 : Japan’s PHS Phone, Year 2001
    25 :
    26 : Wearable Computers
    27 : More Wearable -- Via PC Http://
    28 : Wireless Helmet?
    29 : The Power Ring
    30 : NTT Key Fingers
    31 : The Projection Keyboard
    32 : Today The iphone Plastic Logic QUE 22Moo MyVu Portable projectors Andriod The iPad
    33 : Mobile Technology WarsThe Smart PhoneThe Pad
    34 : Smart Phones
    35 : Smart Phones 2009
    36 : Re-Inventing the Tablet: The New War of the PADs 2010 2010-2011 Microsoft: Soon
    37 : Beneficiaries of Ubiquitous Computing
    38 : Limitations of the Mobile Environment Limitations of the Wireless Network heterogeneity of fragmented networks frequent disconnections limited communication bandwidth Limitations Imposed by Mobility Limitations of the Mobile Computer
    39 : Frequent Disconnections Handoff blank out (>1ms for most cellulars) Drained battery disconnection Battery recharge down time Voluntary disconnection (turned off to preserve battery power, also off overnight) Theft and damage (hostile environment) Roam-off disconnections
    40 : Limited Communication Bandwidth Orders of magnitude slower than fixed network Higher transmission bit error rates (BER) Uncontrolled cell population Difficult to ensure Quality of Service (QoS) Availability issues (admission control) Asymmetric duplex bandwidth Limited communication bandwidth exacerbates the limitation of battery lifetime.
    41 : Limitations of the Mobile Computer Short battery lifetime (max ~ 5 hours) Subject to theft and destruction => unreliable Highly unavailable (normally powered-off to conserve battery) Limited capability (display, memory, input devices, and disk space) Lack of de-facto general architecture: hand-helds, communicators, laptops, and other devices
    42 : Caesar and Brutus
    43 : Limitations Imposed by Mobility Lack of mobility-awareness by applications inherently transparent programming model (object-, components-oriented, but not aspect-oriented) lack of environment test and set API support Lack of mobility-awareness by the system network: existing transport protocols are inefficient to use across heterogeneous mix of fixed/wireless networks session and presentation: inappropriate for the wireless environment and for mobility operating systems: lack of env. related conditions and signals client/server: unless changed, inappropriate and inefficient
    44 : Reading Assignment Pervasive Computing: Vision and Challenges, M. Satyanarayanan, Carnegie Mellon University, IEEE Personal Communications, August 2001

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