Wi fi and wi-Max
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WI-FI / WI-MAX
ANKIT GUPTA MCA 3rd year
1003714008
WI-FI / WIMAX
WI-FI access is hot spots that are very small, so coverage is sparse.
WI-Max access is a high speed of Broadband and is wireless instead of wired.
WI-FI
Wi-Fi is the wireless way to handle networking.
It is also known as 802.11 networking. The big advantage of Wi-Fi is its simplicity.
You can connect computers anywhere in your home or office without the need for wires. The computers connect to the network using radio signals, and computers can be up to 100 feet or so apart.
WIRELESS NETWORKING STANDARDS Wi-Fi refers to the protocols that allow
wireless networking.
These protocols are codified in standards.
Standards are mutually agreed upon rules adopted by the industry on how the wireless networks operate.
WI-FI TYPE
Wireless Personal Area Networks - Up to 10 meter- IEEE 802.15.1 (Bluetooth)
Wireless Local Area Networks - Up to 100 meter- IEEE 802.11 (Wi-Fi)
GOVERNING STANDARDS BODY
Formed in 1999 Founding Companies:
3Com Aironet Harris Semi ConductorLucent Symbol TechnologiesNokia
SPECIFICATIONS
802.11a 802.11b 802.11g 802.11n
WLAN ARCHITECTURE—AD HOC MODE
Ad-Hoc mode: Peer-to-peer setup where clients can connect to each other directly. Generally not used for business networks.
APPLICATION OF WI-FI Many electronic devices use
Wi-Fi due to its simple functions.
Companies use Wi-Fi to create wireless networks within their company.
Phone companies such as use Wi-Fi Hot Spots for their users to get free calling/internet access.
Gaming companies like Nintendo use Wi-Fi to synch their products and to use global network usage.
WI-FI SECURITY
64-bit encryption- original
128-bit encryption- much secure
FUTURE OF WIRELESS TECHNOLOGY
The future is WI-Max Can reach over 50km in range and have
a maximum throughput of 70 Mbps.
WIMAX
Worldwide Interoperability for Microwave Access
Brand licensed by the WiMax Forum. “a standards-based technology enabling the
delivery of last mile wireless broadband access as an alternative to cable and DSL”
WiMAX was seen as more of a Metropolitan Area Network (MAN) technology providing a much larger coverage.
Based on IEEE 802.16
WIMAX Goal: Provide high-speed Internet access to
home and business subscribers, without wires.
Base stations (BS) and subscriber stations (SS)
Centralized access control to prevents collisions
Supports applications with different QoS requirements
WiMAX is a subset of IEEE 802.16 standard
WI MAX
WiMAX, in fact, comes in two forms, one is called ‘fixed WiMAX’ and another is ‘mobile WiMAX’.
WiMAX in its fixed form is seen as a possible alternative to expensive cable and fibre deployment.
It is faster to deploy and less expensive and it also offers operators more flexibility in terms of deployment time frame and possible installation areas.
3G or other cellular network operators could see this as a potential substitute or as a complement to their cellular product.
WI MAX KEY FEATURE
Modulation technique Operating frequencies Problems in wireless transmission
WIFI VS. WIMAX
IEEE 802.11 (Wi-Fi)
IEEE 802.16a (WI Max)
Max Speed 54Mbps (a&g) 10-100Mbps
Range 100m 40 km
QoS none yes
Coverage Indoor Outdoor
Users Hundred Thousand
Service Level None Yes
CONTINUED..
WILL WIMAX DISPLACE WIFI? WiMAX will not replace WiFi
completely, but work TOGETHER
Intel is currently integrating WiMAX and WiFi into a single Centrino chip.
WiFi’s primary role will always be autonomous hotspot service
areas (indoor and outdoor 0 ft. < cell radii <500 ft.).
WiMax will ultimately replace WiFi in large-scale (greater than 1mi.Sq.) commercial and public roles.
WI-FI AND WIMAX TOGETHER
THANK YOU
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