WiMAXSlide 2Slide 3Slide 4Slide 5WiMAX or Worldwide Interoperability of Microwave Access, is a wireless Internet service designed to cover wide geographical areas serving large number of users at low cost.Typical Network RangesSlide 8Slide 9HOW DOES IT WORK ?Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16Slide 17Slide 18Slide 19Slide 20Slide 21Slide 22Slide 23Slide 24Slide 25Slide 26Slide 27Slide 28Slide 29Slide 30Slide 31WiMAXWhat is WiMAX ??Think about how you access the Internet today….3 options !!• Broadband access• Wi-Fi access• Dial-up accessWiMAX or Worldwide Interoperability of Microwave Access, WiMAX or Worldwide Interoperability of Microwave Access, is a wireless Internet service designed to cover wide is a wireless Internet service designed to cover wide geographical areas serving large number of users at low geographical areas serving large number of users at low cost.cost.WiMAX is the synonym given to the IEEE 802.16 standard defining wide area wireless data networking .WAN IEEE 802.16eIMT-2000(3G)(Nationwide)MANIEEE 802.16-2004ETSI HiperMAN/WiMAX(50 Km)LANIEEE 802.11 (a,b,g)(150 m)PANIEEE 802.15Bluetooth(10m)Typical Network RangesTypical Network RangesWide Area NetworkMetropolitan Area NetworkLocal Area NetworkPersonal Area NetworkA WiMAX system consists of two parts :• A TransmitterA single WiMAX tower can provide coverage to a very large area – as big as 3,000 sq. miles• A ReceiverThe receiver and antenna could be a small box or PCMCIA card or they could built into a laptop as the way Wi-Fi access is today.WiMAXWiMAXWiMAXHOW DOES IT WORK ?HOW DOES IT WORK ?• WiMAX uses microwave radio technology to connect computers to the internet in place of wired connections such as DSL or cable modems. • It works very much like cell phone technology in that reasonable proximity to a base station is required to establish a data link to the Internet. • Users within 3 to 5 miles of the base station will be able to establish a link using NLOS technology with data rates as high as 75 Mbps. • Users up to 30 miles away from the base staion with an antenna mounted for LOS to the base station will be able to connect at data rates approaching 280 Mbps.Forms of Wireless Service • NLOS (Non Line of Sight)Wi-Fi sort of service• LOS ( Line of Sight)WiMAXFixed WiMAX(IEEE 802.16-2004)Ex: ETSI HiperMAN• Optimized for Fixed and nomadic applications in LOS and NLOS environment• 10-66 GHz licensed frequency bands (LOS)• Licensed and license-exempt sub 11 GHz bands (LOS & NLOS)Mobile WiMAX(IEEE 802.16e)Ex: WiBro• Optimized for Portable and mobile applications in NLOS environment• Sub 6 GHz bandsCustomer Premise EquipmentWireless PMP AccessBase StationPtP WirelessBackhaul Traffic AggregationCentral Office,Network Management,VOIP Server etc.IEEE 802.16 • Air Interface for Fixed Broadband Wireless Access SystemMAC and PHY specifications for 10-66 GHZ (LOS)• One PHY: Single Carrier• Connection oriented, TDM/TDMA MAC, QOS, PrivacyIEEE 802.16 a• Amendment to 802.16, MAC Modifications and additional PHY Specifications for 2-11 Ghz (NLOS)• Three PHYs: OFDM, OFDMA, Single Carrier• Additional MAC functions: OFDM and OFDMA PHY support, Mesh topology support, ARQIEEE 802.16d• Combines both IEEE 802.16 and 802.16a• Some modifications to the MAC and PHYIEEE 802.16e• Amendment to 802.16-2004• MAC modifications for limited mobilityThe different flavors of WiMAXFixed OutdoorApplications• E1/T1 service for enterprises• Backhaul for Hotspots • Limited residential Broadband accessCPE• External box connected to PC with outside antennaFixed OutdoorApplications• Indoor Broadband access for residential users ( High Speed Internet, VoIP,…)CPE• External box connected to PC with built-in antennaLimited MobilityApplications• “Portable” Broadband access for consumers• Always Best ConnectedCPE• PC Card802.16 a 802.16 REVd 802.16 eSystem for 802.16 WiMAXSystem for 802.16 WiMAXInternet BackboneTelco core network orPrivate (fiber) networkNon-Line-of-sight, point-to-multipointOr point-to-point backhaul : 802.16aNon-line-of-sight,Point-to-multipoint: 802.16aAccess Point802.11A TYPICAL WiMAX AND WiLAN DEPLOYMENTISP PoPWi-Fi HotspotsWiMAX PTP backhaulWiMAX Point-To-Point backhaulISP PoPWire line or Wireless backhaulWiMAX Base StationWiMAX point-to-multipointHomes with outdoor/indoorWiMAX receiverPoint to Multipoint applicationWiMAX as the backbone of meshed networksWiMAX may enjoy a complementary relationship with Wi-Fi due to differences in the reach of each of the networks . WiMAX connections can be used to provide backhaul connections to Wi-Fi hotspots over longer distances. WiMAX could also play a key role in connecting Wi-Fi hotspots in a mesh-type network to quickly increase coverage and capacity. Wi-FiWiMAXFactors affecting WiMAX performance (throughput and range)• Frequency Band on which it is operating• Channel Bandwidth• Duplexing Scheme (TDD or FDD)• Modulation (BPSK, QPSK, 16-QAM or 64-QAM) and Code Rate• Antenna Types • Whether LOS or NLOS•Transmit Power• Receiver Sensitivity• The no. of users per base station sector.StandardStandardFamily Family Primary Primary UseUseRadio TechRadio TechDownlink Downlink (Mbps)(Mbps)Uplink Uplink (Mbps)(Mbps)802.16 e802.16 eWiMAXWiMAXMobile Mobile InternetInternetMIMO-MIMO-SOFDMASOFDMA70707070Quoted speeds only achievable Quoted speeds only achievable at very short ranges, more at very short ranges, more practically 10 Mbps at 10 km. practically 10 Mbps at 10 km. HIPERMANHIPERMANHIPERMANHIPERMANMobile Mobile InternetInternetOFDMOFDM56.956.956.956.9WiBroWiBroWiBroWiBroMobile Mobile InternetInternetOFDMAOFDMA50505050Mobile range (900 m)Mobile range (900 m) iBurstiBurstiBurst802.iBurst802.2020Mobile Mobile InternetInternetHC-SDMAHC-SDMA646464643-12 km3-12 km UMTS W-CDMA HSDPA + HSUPAUMTS W-CDMA HSDPA + HSUPAUMTS/3GSUMTS/3GSMMMobile Mobile PhonePhoneCDMA/FDCDMA/FDDD.384.3843.63.6.384.3845.765.76HSDPA downlink widely HSDPA downlink widely deployed. Roadmap shows deployed. Roadmap shows HSDPA up to 28.8 Mbps HSDPA up to 28.8 Mbps downstream in the future. downstream in the future. Currently, users can expect Currently, users can expect typical download speeds of 1-2 typical download speeds of 1-2 Mbps but around 200 kbps Mbps but around 200 kbps uplink speeds.uplink speeds.UMTS-TDDUMTS-TDDUMTS/3GSUMTS/3GSMMMobile Mobile InternetInternetCDMA/TDCDMA/TDDD16161616Reported speeds according