Wireless Networking

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Wireless Networking Powered By Docstoc
					Wireless Networking
        WiFi, WiMax, and Bluetooth

                      By
Felix Sarabia, Nolan Bosworth, James Walters
                           What is Wireless?
    Now the term is used to describe modern
     wireless connections such as those in cellular
     networks and wireless broadband Internet. In
     modern usage, wireless is a method of
     communication that uses low-powered radio
     waves to transmit data between devices.
       • Wireless refers to communication without cables or
         cords, chiefly using radio frequency and infrared waves.
       • Common uses include the various communications
         defined by the IrDA, the wireless networking of
         computers and cellular mobile phones.


http://en.wikipedia.org/wiki/Wireless
    What does it have to do with you?
   We are going to touch base with Wi-Fi,
    WiMax, and Bluetooth Technology.
   Wi-Fi, being something that many people
    use on a daily basis.
   WiMax, a form of technology that is being
    refined and experimented with and we
    may be seeing much more if it in the near
    future.
   Bluetooth, an up and coming technology
    that is starting to gain popularity, as well
    as mass interaction on a day to day basis.
                                               Wi-Fi
   Wi-Fi was developed to be used for mobile
    computing devices, such as laptops, in LANs, but
    is now increasingly used for more applications.
    • Including Internet and VoIP phone access
    • Gaming
    • Basic connectivity of consumer electronics such as
      televisions and DVD players, or digital cameras.
    • There are even more standards in development that will
      allow Wi-Fi to be used by cars in highways in support of
      an Intelligent Transportation System to increase safety,
      gather statistics, and enable mobile commerce IEEE
      802.11p
    http://en.wikipedia.org/wiki/IEEE_802.11
                                         WiMax
   WiMAX is a term coined to describe
    standard, interoperable implementations
    of IEEE 802.16 wireless networks, in a
    rather similar way to Wi-Fi being
    interoperable implementations of the IEEE
    802.11 Wireless LAN standard. However,
    WiMAX is very different from Wi-Fi in the
    way it works.

   http://en.wikipedia.org/wiki/Wimax
                    Not a Technology?!?
   According to the Organisation for Economic Co-operation
    and Development (OECD)

    • "WiMAX is not a technology, but rather a certification mark, or
      'stamp of approval' given to equipment that meets certain
      conformity and interoperability tests for the IEEE 802.16
      family of standards. A similar confusion surrounds the term
      Wi-Fi (Wireless Fidelity), which like WiMAX, is a certification
      mark for equipment based on a different set of IEEE standards
      from the 802.11 working group for wireless local area
      networks (WLAN). Neither WiMAX, nor Wi-Fi is a technology
      but their names have been adopted in popular usage to denote
      the technologies behind them. This is likely due to the
      difficulty of using terms like 'IEEE 802.16' in common speech
      and writing."
    http://en.wikipedia.org/wiki/Wimax
                               Wi-Fi vs WiMAX
   The WiMAX specification improves upon many of
    the limitations of the Wi-Fi standard by providing
    increased bandwidth and range and stronger
    encryption. It provides connectivity between
    network endpoints without need for direct line of
    sight in favorable circumstances. The non-line-of-
    sight propagation (NLOS) performance requires
    the .16d or .16e revisions, since the lower
    frequencies are needed. It relies upon clever use
    of multi-path signals.
   http://en.wikipedia.org/wiki/Wimax
        What you should know about
                  WiMAX
   The bandwidth and reach of WiMAX make
    it suitable for the following potential
    applications:
    • Connecting Wi-Fi hotspots with each other and
      to other parts of the Internet
    • Providing a wireless alternative to cable and
      DSL for last mile (last km) broadband access.
    • Providing high-speed mobile data and
      telecommunications services (4G)

    •   http://en.wikipedia.org/wiki/Wimax
                      Getting It Just Right
   WiMAX uses licenced
    spectrum and has
    strong authentication
    mechanisms built in.
    It has considerably
    greater range than
    Wi-Fi. Taken together,
    this means that
    WiMAX and Wi-Fi are
    generally
    complementary rather
    than competing.


   http://en.wikipedia.org/wiki/Wimax
    WiMAX, More Than Internet?
   WiMAX has the potential to
    replace a number of existing
    telecommunications
    infrastructures. In a fixed
    wireless configuration it can
    replace the telephone
    company's copper wire
    networks, the cable TV's
    coaxial cable infrastructure
    while offering Internet Service
    Provider (ISP) services. In its
    mobile variant, WiMAX has
    the potential to replace
    cellular networks.
   http://www.wimax.com/education/wimax/what_is_wimax
                             Bluetooth Technology
   Bluetooth is an industrial
    specification for wireless
    personal area networks
    (PANs), also known as IEEE
    802.15.1. Bluetooth provides
    a way to connect and
    exchange information
    between devices such as
    personal digital assistants
    (PDAs), mobile phones,
    laptops, PCs, printers, digital
    cameras and video game
    consoles via a secure, globally
    unlicensed short-range radio
    frequency.

   http://en.wikipedia.org/wiki/Bluetooth
              Bluetooth Contd.
   Bluetooth is a radio standard and
    communications protocol primarily designed for
    low power consumption, with a short range
    (power class dependent: 1 meter, 10 meters, 100
    meters) based around low-cost transceiver
    microchips in each device.

   Bluetooth lets these devices communicate with
    each other when they are in range. The devices
    use a radio communications system, so they do
    not have to be in line of sight of each other, and
    can even be in other rooms, so long as the
    received transmission is powerful enough.
                            How it all started
   The Bluetooth specification was first developed in
    1994 by Jaap Haartsen, who was working for
    Ericsson Radio Systems located in Emmen in The
    Netherlands. The specifications were formalized
    by the Bluetooth Special Interest Group (SIG).
    The SIG was formally announced on May 20,
    1998.
   Today it has over 1800 companies worldwide. It
    was established by Ericsson, Sony Ericsson, IBM,
    Intel, Toshiba and Nokia, and later joined by
    many other companies as Associate or Adopter
    members. Bluetooth is also known as IEEE
    802.15.1.
   http://en.wikipedia.org/wiki/Bluetooth
                  Bluetooth Applications
   Wireless control of and communication between a cell phone and a hands
    free headset or car kit. This is the most popular use.
   Wireless networking between PCs in a confined space and where little
    bandwidth is required.
   Wireless communications with PC input and output devices, the most
    common being the mouse, keyboard and printer.
   Transfer of files between devices via OBEX.
   Transfer of contact details, calendar appointments, and reminders
    between devices via OBEX.
   Replacement of traditional wired serial communications in test equipment,
    GPS receivers and medical equipment.
   For remote controls where infrared was traditionally used.
   Sending small advertisements from Bluetooth enabled advertising
    hoardings to other, discoverable, Bluetooth devices.
   Wireless control of a games console, Nintendo's Wii and Sony's PlayStation
    3 will both use Bluetooth technology for their wireless controllers.
   Sending commands and software to the LEGO Mindstorms NXT instead of
    infrared.

   http://en.wikipedia.org/wiki/bluetooth
                Bluetooth vs. WiFi
   Bluetooth is in a variety of new products such as phones, printers,
    modems, and headsets, to name a few. Bluetooth is acceptable
    for situations when two or more devices are in close proximity
    with each other and don't require high bandwidth. Bluetooth is
    most commonly used with cell phones and handheld computing
    devices, either using a Bluetooth headset or transferring files from
    phones/PDAs to computers. Since Bluetooth uses short-range
    radio frequencies, it is not as effective for setting up networks
    that can be accessed from remote locations as with Wi-Fi.

   Bluetooth also simplified the discovery and setup of services. Wi-
    Fi is more analogous to the traditional Ethernet network, and
    requires configuration to set up shared resources, transmit files,
    set up audio links (e.g. headsets and hands-free devices),
    whereas Bluetooth devices advertise all services they actually
    provide; this makes the utility of the service that much more
    accessible, without the need to worry about network addresses,
    permissions and all the other considerations that go with typical
    networks.
                          Bluetooth vs. WiFi
   Wi-Fi uses the same radio frequencies as Bluetooth, but with higher power
    consumption resulting in a stronger connection. As mentioned earlier, Wi-
    Fi is sometimes called "wireless ethernet". Although this description is
    inaccurate, it provides an indication of Wi-Fi's capabilities.[verification
    needed] Wi-Fi is better suited for setting up networks as it enables a
    faster connection and has better security than Bluetooth. Wi-Fi is also
    becoming increasingly popular and widespread; it is a standard feature of
    most new laptop computers, and is a straightforward expansion to desktop
    computers not already Wi-Fi enabled (eg. through the use of a USB
    dongle).

   As a traditional networking medium, Wi-Fi is more versatile, but harder to
    configure. Most users need good know-how (or an IT department) to get
    things set up, especially when using more obscure services such as audio
    and HID. For this reason, Wi-Fi falls well short of the standard for ad-hoc
    networking, one of the basic tenets of the Bluetooth framework.

   http://en.wikipedia.org/wiki/Bluetooth
                   In Conclusion
   Wireless technology may seem like the next step in
    networking, to an extent cannot be used to their full
    potential due to interference from weather or other
    phenomena that may alter radio waves.
   There are many who are refining and developing wireless
    networking to make it global such as WiMAX, that is also a
    compliment to Wi-Fi and may help expand Wi-Fi’s
    capabilities as well.
   One can look to the future and see wireless technology as
    being a competitor in networking because of how quickly
    many business are trying to take advantage of them. Ex.
    Bluetooth in cellular technology, in computers, cars, etc.
    Wi-Fi for schools, WiMAX for entire cities.
                Source Page
   www.wikipedia.org
    • http://en.wikipedia.org/wiki/Institute_of_Electr
      ical_and_Electronics_Engineers
    • http://en.wikipedia.org/wiki/IEEE_802.11
    • http://en.wikipedia.org/wiki/Bluetooth
    • http://en.wikipedia.org/wiki/Wireless
    • http://en.wikipedia.org/wiki/Wimax
    • http://www.bluetooth.com/Bluetooth/Learn/Ba
      sics/
    • http://www.wimax.com/education/wimax/wim
      ax_overview
    • http://www.wimax.com/education/wimax/what
      _is_wimax

				
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