Wimax & ComparisonWith Wifi M.Kanimozhi III MCA 29713
•Why WiMAX?•What is WiMAX?•History of WiMAX•How WiMAX works?
Think about how you access the Z Internet today??????
There are basically three different options Broadband access Wi-Fi access Dial-up access
Need for new Technology...The high speed of broadband service.Wireless rather than wired access .It would be a lot less expensive than cable or DSL Much easier to extend to suburban and ruralareasBroad coverage like the cell phone networkinstead of small WiFi hotspots
A system to provide all these featuresis known as WiMAX
WIMAX Worldwide Interoperability for Microwave Access It is of the standard IEEE 802.16. WiMAX could replace cable and DSL services, providing universal Internet access just about anywhere you go.
History Of WiMAX 1999 The Institute of Electrical and Electronics Engineers (IEEE) devised the 802.16 standard 2001 Operated on a point-to-point radio link network by means of line of sight transmissions, had a frequency range of 10 GHz to 66 GHz Developers focused more exclusively on the 802.16 standard that functioned in the range of 2 GHz to 11 GHz. The WiMAX Forum was established with the agenda to market and promote the 802.16 standard 2003 The IEEE came out with 802.16a, which transmitted data through non-line of sight radio channels to and from omni-directional antennas.
History Of WIMAX(contd…) 2004The 802.16-2004 standard was released. This standard combined theupdates from the IEEE 802.16a, 802.16b, and 802.16c regulations. 2005First Mobile WiMAX system: 802.16e.it supported over 2,000 subcarriers, optimized handover delay and packet loss, and increased network security. Publish their next major 802.16 standard named 802.16m. One of the goals for this version is to increase data speeds to 1Gbps.
How Wimax works?A WiMAX tower station can connect directly to the Internetusing a high-bandwidth, wired connection (for example, a T3line). It can also connect to another WiMAX tower using a line-of-sight, microwave link.This connection to a second tower (often referred to asa backhaul), along with the ability of a single tower to cover upto 3,000 square milesIt allows WiMAX to provide coverage to remote rural areas.
•WiMAX System• Two forms of wireless service•WiMAX Coverage and Speed• WiMAX Spectrum•WiMAX Standards•WIMAX Equipment•Uses of WiMAX•Applications
A WiMAX SystemIt consists of two parts:A WiMAX towerA WiMAX receiver
A WiMAX towerIt is similar in concept to a cell-phone tower .A single WiMAX tower can provide coverage to a very large area – as big as 3,000 square miles (~8,000 square km).
A WiMAX receiverThe receiver and antenna could be asmall box or PCMCIA card,or they could be built into a laptop the wayWiFi access is today.
Two forms of wireless serviceNon-line-of-sightline-of-sight
Non-line-of-sight WiFi sort of service A small antenna on your computerconnects to the tower. WiMAX uses a lower frequency range --2 GHz to 11 GHz (similar to WiFi).
Line-of-sight A fixed dish antenna points straight at the WiMAXtower from a rooftop or pole. The line-of-sight connection is stronger and morestable, so its able to send a lot of data with fewererrorsIt use higher frequencies, with ranges reaching apossible 66 GHz. At higher frequencies, there is less interferenceand lots more bandwidth.
Coverage and speedWiMAX should be able to handle up to 70 megabitsper second.WiMAX will blanket a radius of 30 miles (50 km)with wireless access.The increased range is due to the frequenciesused and the power of the transmitter.
IEEE 802.16 SpecificationsRange - 30-mile (50-km) radius from base stationSpeed - 70 megabits per secondLine-of-sight not needed between user and base stationFrequency bands - 2 to 11 GHz and 10 to 66 GHz (licensedand unlicensed bands)
WiMax Spectrum Unlicensed 5 GHz : The bands between 5.25 and 5.85 GHz. Licensed 3.5 GHz:The Bands between 3.4 and 3.6 GHz Licensed 2.5 GHz: The bands between 2.5 and 2.6 GHz
WiMax Standards 802.16 802.16a 802.16- 2004Date December 2001 January 2003 June 2004CompletedSpectrum 10-66 GHz < 11 GHz < 11 GHzOperation LOS Non-LOS Non-LOSBit Rate 32-134 Mbps Up to 75 Mbps Up to 75 MbpsCell Radius 1-3 miles 3-5 miles 3-5 miles
WiMAX Technology at HomeAn Internet service provider sets up a WIMAX base station 10 milesfrom your home.You would buy a WiMAX-enabled computer or upgrade your oldcomputer to add WiMAX capability. You would receive a special encryption code that would give youaccess to the base station. The base station would beam data from the Internet to yourcomputer (at speeds potentially higher than todays cable modems),for which you would pay the provider a monthly fee.The cost for this service could be much lower than current high-speed Internet-subscription fees because the provider never had torun cables.
Fixed wireless access (FWA) Wireless access application in which the location of the end-user termination and the network access point to be connected to the end-user are fixed.
Mobile wireless access (MWA)Wireless access application in which thelocation of the end-user termination ismobile.
Nomadic wireless access (NWA)Wireless access application in which thelocation of the end-user termination maybe in different places but it must bestationary while in use.
WiMAX Technology .For fixed and portable access applications• Up to 40 Mbps per channel, in a cell radius of 3 ~ 10 kmFor mobile network deployments• Up to 15 Mbps per channel, in a cell radius up to 3 km
WIMAX EquipmentsThere are numerous devices on the market that provide connectivityto a WiMAX network. These are known as the "subscriber unit" (SU).Some connecting devices:GatewaysDonglesMobile Phones
Gateways•WiMAX gateway devices are available as both indoor andoutdoor versions from several manufacturers.Indoor gatewaysOutdoor gateways
GatewaysIndoor gateways are convenient, but radio losses mean that thesubscriber may need to be significantly closer to the WiMAX basestation than with professionally-installed external units.Outdoor gateways are roughly the size of a laptop PC, and theirinstallation is comparable to the installation of a residential satellitedish.
DonglesIt provides connectivity to a WiMAX network.Dongles typically have omnidirectional antennae which are oflower-gain compared to other devices, as such these devices arebest used in areas of good coverage.The Bluetooth USB Dongle is an external adapter that can beconnected to the USB port of any notebook or desktop PC
Mobile PhoneHTC announced the first WiMAX enabled mobilephone, the Max 4G, on November 12, 2008.The device was only available to certain marketsin Russia on the Yota network.
Interesting Points Simultaneously support hundreds of businesses with T-1 speed connectivity and thousands of homes with DSL speed connectivity. Promise of potential low cost and flexibility in building broadband networks.Support for both voice and video as well as Internet data.
Uses of WI-MAXThe bandwidth and range of WiMAX make it suitable for thefollowing potential applicationsProviding portable mobile broadband connectivity across citiesand countries through a variety of devices.Providing a wireless alternative to cable and DSL for "last mile "broadband accessProviding data, telecommunications (VoIP) and IPTV services(triple play).
WiMax Applications:According to WiMax Forum it supports 5 classes ofapplications: Multi-player Interactive Gaming. VOIP and Video Conference Streaming Media Web Browsing and Instant Messaging Media Content Downloads
IEEE StandardsWi-Fi is based on IEEE 802.11 standardWiMAX is based on IEEE 802.16 standard
Coverage and speedWiFi-style access will be limited to a 4-to-6 mile radiusWiMAX access will be within 30 mile radius(due to strongerline-of-sight antennas)The fastest WiFi connection can transmit up to 54 megabitsper second WiMAX can transmit up to 70 megabits per second. The biggest difference isnt speed; its distance
Data TransferWimax offer high speed internet as a broadband accesswhich transfer data, voice, video at very high speed.WiFi offer short range of data transfer because WiFi canconnect only in specified areas so only file sharing maypossible.
CostWimax is a high cost network.Wifi is a low cost networktherefore mostly people adopt WiFi network due to lessexpenditure and avoid Wimax due to expensive installations.
Quality of ServiceWi-Fi does not guarantee any QoSWiMax will provide your several level of QoS.
conclusionProvide high-speed Internet access to home and business subscribers, without wires.Use wireless links with microwavestandard based technology enabling the delivery of last milewireless broadband access as an alternative to cable and DSL