WiMAX Worldwide Interoperability for Microwave Access AMIT KUMAR AMIT KUMAR M TECH (ECE) M TECH (ECE)

The world of WIRELESS….. The world of WIRELESS….. Have you ever wanted to lounge on a beach chair at a fancy resort and surf the Internet? Connect and get your in a coffee shop ? Have you ever wanted to lounge on a beach chair at a fancy resort and surf the Internet? Connect and get your in a coffee shop ? Put together some computers in your home so that they can share files or access to the Internet without drilling holes or snaking snarled wires from one computer to another? Put together some computers in your home so that they can share files or access to the Internet without drilling holes or snaking snarled wires from one computer to another?

What Is WiFi?  WiFi, short for wireless fidelity, is a wireless standard, or protocol, used for wireless communication.  WiFi devices are certified interoperable and run on some flavor of , a medium-range wireless networking standard.  runs at speeds roughly comparable to those of wired networks.  No license is required to broadcast or communicate using (or WiFi).  Free portions of the radio spectrum used by (and WiFi) are the 2.4GHz band, and, more recently, the 5GHz band.

But if this is WiFi then what is WiMAX!!!

What is WiMAX?  WiMAX is an acronym that stands for Worldwide Interoperability for Microwave Access, a certification mark for products that pass conformity and interoperability tests for the IEEE standards.  It is similar to WiFi in concept, but has certain improvements that are aimed at improving performance and should permit usage over much greater distances.

GHz ISM: Industrial, Scientific & Medical Band – Unlicensed band UNII: Unlicensed National Information Infrastructure band – Unlicensed band ISM 5 International Licensed US Licensed Japan Licensed International Licensed ISM a has both licensed and license-exempt options SPECTRUM

WiMAX Features  Long range, high data rate  Less susceptible to interference  Very viable mobile alternative to DSL and cable  Wireless broadband data delivery at home  Plug and play installation  Can connect IEEE (Wi-Fi) hotspots with each other and to other parts of the Internet

The Problems WiMAX Solves  Broadband wireless access to the masses  An inexpensive alternative to digital subscriber lines (DSL) and cable broadband access  Installation costs for a wireless infrastructure based on is far less than today's wired solutions  WiMAX can also solve the problem of how to keep wireless notebooks and other mobile devices connected between hotspots

WiMAX APPLICATIONS  Cellular backhaul  Broadband to rural and remote areas  Broadband on demand  Broadband residential  Best connected wireless services

RANGE OF SERVICES BY WiMAX

HOW WIMAX WORKS ??

Infrastructure of WIMAX Infrastructure of WIMAX A WIMAX tower: similar in concept to a cell-phone tower. A single WIMAX tower can provide coverage to a very large area (~8,000 km). A WIMAX tower: similar in concept to a cell-phone tower. A single WIMAX tower can provide coverage to a very large area (~8,000 km). A WIMAX receiver : The receiver and antenna could be a small box or PCMCIA card, or could be built into a laptop. A WIMAX receiver : The receiver and antenna could be a small box or PCMCIA card, or could be built into a laptop.

Introduction A WIMAX towerAn example of WIMAX receiver : PCMCIA card

WiMAX System Parts WiMAX tower WiMAX tower Similar in concept to a cell-phone tower Similar in concept to a cell-phone tower Can provide coverage to a very large area -- as big as 3,000 square miles Can provide coverage to a very large area -- as big as 3,000 square miles A WiMAX receiver A WiMAX receiver The receiver and antenna could be a small box or PCMCIA card, or they could be built into a laptop the way WiFi access is today The receiver and antenna could be a small box or PCMCIA card, or they could be built into a laptop the way WiFi access is today

Two forms of wireless service Non-line-of-sight Non-line-of-sight A small antenna on your computer connects to the tower A small antenna on your computer connects to the tower 2 GHz to 11 GHz frequency range 2 GHz to 11 GHz frequency range Limited to a 4-to-6 mile radius Limited to a 4-to-6 mile radius

Two forms of wireless service Line-of-sight service Line-of-sight service A fixed dish antenna points straight at the WiMAX tower from a rooftop or pole. A fixed dish antenna points straight at the WiMAX tower from a rooftop or pole. 66 GHz frequency range 66 GHz frequency range Higher frequencies, there is less interference and lots more bandwidth Higher frequencies, there is less interference and lots more bandwidth 30-mile radius 30-mile radius

Specifications Range Range 30-mile radius from base station 30-mile radius from base station Speed Speed 70 megabits per second 70 megabits per second Line-of-sight not needed between user and base station Line-of-sight not needed between user and base station

In practical terms, WiMAX would operate similar to WiFi but at higher speeds, over greater distances and for a greater number of users. In practical terms, WiMAX would operate similar to WiFi but at higher speeds, over greater distances and for a greater number of users.

Uses for WiMAX Uses for WiMAX   Fixed last-mile broadband access as a replacement or substitute for wired DSL, cable, or T1 connections   Hotspot subscriber and Backhaul provider connections supported   High-speed enterprise connectivity for business   WiMAX antennae may be even connected to an Internet backbone via either a light fiber optics cable or a directional microwave link.   Sony and Microsoft are closely considering the addition of WiMax as a feature in their next generation game console allowing gamers to create ad hoc networks with other players.

Wifi vs. Wimax

COMPARISION OF WiMax WITH OTHER TECHNOLOGIES

WiMAX as a Metro-Access Deployment Option  Fixed( IEEE ) * For fixed devices not mobile in nature. * For fixed devices not mobile in nature. * Its just a wireless form of DSL or T1. * Its just a wireless form of DSL or T1.  Portable( IEEE e) * OFDMA * OFDMA * Carrier divided into multiple sub carriers * Carrier divided into multiple sub carriers * last-mile delivery improved by multi-path interference, delay spread, robustness * last-mile delivery improved by multi-path interference, delay spread, robustness

Key WiMAX Players  Alcatel  Ericsson  Intel  Lucent,  Motorola  Samsung  Siemens  Dishnet  Many others…

PROSPECTS FOR WiMax Internet users

PROSPECTS FOR WiMax(cont..) WiMAX Subscribers

FUTURE PROSPECTS The WiMAX forum, backed by industry leaders (like Intel), helps the widespread adoption of broadband wireless access by establishing a brand for the technology. The WiMAX forum, backed by industry leaders (like Intel), helps the widespread adoption of broadband wireless access by establishing a brand for the technology. When WiMAX chipsets are integrated into laptops and other portable devices, it will provide high-speed data services on the move, extending today's When WiMAX chipsets are integrated into laptops and other portable devices, it will provide high-speed data services on the move, extending today's It will enable end-users to enjoy an "Always Best Connected" experience. It will enable end-users to enjoy an "Always Best Connected" experience. And More… And More…

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