모바일 시스템 – Lecture 1. Introduction To Mobile System

모바일 시스템 소개 - Introduction To mobile System
Mobile System


Contents - Mobile System Introduction


 

Mobile Computing : Content, Infrastructure, and Services

New Computing Environment : Moblie computing

  1. Moblie devices
    1. Personal Digital Assistant (PDA) - 개인  휴대정보 단말기

      A handheld computer principally used for personal information management

    2. Smart Phone

      Internet-enabled cell phone that can support mobile applications

    3. Black berry

      A handheld device principally used for e-mail

    4. Moblie + Wired
      1. Tablet PC
      2. Laptop Computer
      3. PDA ( Palm )
    5. Mobile + Wirless
      1. Wearables
      2. MP3 Players
      3. Portable TV
      4. Wireless-mobile computing
      5. Cellular phone
      6. Wireless tablet PC
      7. wireess laptop or PDA Pagers
      8. Black berry, Smartphone
    6. Fixed + Wired
      1. Desktop Computer
      2. Landline phone
      3. Cable TV
    7. Fixed + Wireless
      1. Free-to-air TV
      2. Amateur and commercial radio
    8. Wireless mobile computing

      Computing that connects a mobile device to a network or another computing device, anytime, anywhere

    9. Challenges
      1. Computing Standards
      2. Small Displays
      3. Reduced bandwidth
      4. Restricted memory

Moblie Computing Software

  1. Moblie OS : Palm OS, Window CE
  2. Micro browser

    Wireless Web browser designed to operate with small screens and limited bandwidth and memory requirements

  3. WAP : Wireless Application Protocol

    A suite of network protocols designed to enable different kinds of wireless devices to access WAP readable files on an Internet-connected Web server

    wireless communication arcitecture

  4. Markup Languages
    1. WML : Wireless Markup Language

      used to create content in the WAP environment;
      based on XML, minus unnecessary content to increase speed

    2. cHTML : Compact Hypertext Markup Language

      used to create content in i-mode

  5. xHTML : Extensible HTML
    1. A general scripting language
    2. compatible with HTML
    3. a stnadard set by W3C
  6. VXML : voice XML
    1. An extension of XML designed to accommodate voice

Moblie Computing Services

  1. SMS : Short Message service

    A service that supports the sending and receiving of short text message on moblie phones

  2. EMS : Enhanced MS

    An extension of SMS that can send simple animations, tiny pictures, sounds, and formatted text

  3. MMS : Multimedia MS

    The emerging generation of wireless messaging;
    This is able to deliver rich media

  4. Location-based services

    GPS : global positioning system
    A worldwide satellite-based tracking system that enables users to determine their position anywhere on the earth

  5. Voice-support services

    IVR : Interactive Voice Response
    A voice system that enables users to request and receive information and to enter and change data through a telephone to a computerized system


Wireless Telecommunications Networks

PAN : Personal area network

A wireless telecommunications network for device-to-device connections within a very short range

  • Bluetooth : most common PAN tool

    A set of telecommunications standards that enables wireless devices to communicate with each other over short distances

Wireless Local Area Networks (WLAN)

  A telecommunications network that enables users to make short-range wireless connections to the Internet or another network (most run on Wi-Fi)

  • Wi-Fi (wireless fidelity)

    The common name used to describe the IEEE 802.11 standard used on most WLANs

Municipal Wi-fi Networks

  1. WiMax

    A wireless standard (IEEE 802.16) for making broadband network connections over a medium size area such as a city

  2. wireless metropolitan area network (WMAN)

    A telecommunications network that enables users to make medium-range wireless connections to the Internet or another network

WIRELESS WIDE AREA NETWORKS

  1. wireless wide area network (WWAN)

    A telecommunications network that offers wireless coverage over a large geographical area, typically over a cellular phone network

  2. WWAN communication bandwidths
    1. 1G
      The first generation of wireless technology, which was analog based
    2. 2G
      The second generation of digital wireless technology; accommodates voice and text
    3. 2.5G
      An interim wireless technology that can accommodate voice, text, and limited graphics
    4. 3G
      The third generation of digital wireless technology; supports rich media such as video
    5. 3.5G
      This generation was inserted into the ranks of cell phone generations; it refers to the packet-switched technologies used to achieve higher transmission speeds
    6. 4G
      Present wireless technology
    7. 5G
      The expected next generation of wireless technology that will provide faster display of multimedia

Mobile Commerce : Attributes, Benefits, and Drivers

mobile commerce (m-commerce, m-business)

Any business activity conducted over a wireless telecommunications network or from mobile devices

Attributes of M-Commerce

  1. Ubiquity
  2. Convenience
  3. Interactivity
  4. Personalization
  5. Localization

Moblie Financial Applications

Mobile Banking and Financial Services

Customers can use their mobile handsets to access account balances, pay bills, and transfer funds using SMS

Wireless Electronic Payment Systems

  1. Wireless payment systems transform mobile phones into secure, self-contained purchasing support tools capable of instantly authorizing payments over the cellular network
  2. m-wallet (mobile wallet)
    Technologies that enable cardholders to make purchases with a single click from their wireless device

Security and Other Implementation Issues in M-Commerce

M-Commerce Security Issues

  1. Malicious codes
  2. Transaction security
  3. Wireless communication
  4. Physical security of mobile devices
  5. Ease of use and poor security
  6. Security measures

Technological Barriers to M-Commerce

  1. Many Web sites are not designed for viewing by mobile devices
  2. Current devices have limited usability, particularly with respect to pocketsize screens or data input devices
  3. Quick and easy navigation of sites is necessary but not always available in the mobile environment

Pervasive Computing - Ubiquitous Computing

pervasive computing

Invisible, everywhere computing that is embedded in the objects around us

  1. Invisible computing
  2. Principles of pervasive computing
    1. Decentralization
    2. Diversification
    3. Connectivity
    4. Simplicity

Smart Applications: Homes, Cars, and More

  • Smart homes
    • Lighting
    • Energy management
    • Water control
    • Home security and communications
    • Home entertainment