Wi fi and wi-Max

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