Wireless Networking

1
Wireless Networking

• WiFi, WiMax, and Bluetooth
• By
• Felix Sarabia, Nolan Bosworth, James Walters

2
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

3
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.

4
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

5
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

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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

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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

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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

9
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

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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

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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

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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.

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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

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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

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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.

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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

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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-Fis 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.

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Source Page

• www.wikipedia.org
• http//en.wikipedia.org/wiki/Institute_of_Electric
  al_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/Basics/
• http//www.wimax.com/education/wimax/wimax_overvie
  w
  
• http//www.wimax.com/education/wimax/what_is_wimax