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May 26, 2015



A brief overview on both the technologies and their impact on the Next Generation Wireless Networks (NGN).

  • 1. WiMAX vs LTEPriyanka GaggarPriyadarshiniKhushboo KalyaniKunal NadkarniAnkush Gadodia

2. Introduction Need to go beyond 3G WirelessInteroperability forMicrowave Access(WiMAX) Long Term Evolution(LTE) Global perspective 3. Wide spread use of Broadband Widespread usage of the INTERNET Hunger for more speed and better quality of service. Shift from landline Broadband to Smart phones and Tablets forfaster and ease of access to the internet. Broadband Wireless- The next big thing!! 4. Rise of Broadband Increasing use of broadband worldwide 5. Rise of Data traffic Major increase in data traffic includes multimedia content 6. Motivation for 4G Improve Spectral Efficiency Spectrum flexibility Higher peak data rates Lower infrastructure costs Lower Latency Improved capacity Deployment of Flattening architecture 7. Battle of the Megabytes WiMAX vs LTE- Clash of the Titans WiMAX- An IP based wireless broadband access technologythat provides performance similar to Wi-Fi with coverage andQoS (Quality of Service) of cellular networks. Cellular-backed LTE, with overwhelming support fromcellular operators, looks to be late starting favorite Intel, Samsung, Cisco etc. are supporting WiMAX whereas,NSN, Ericsson, Alcatel Lucent etc. are supporting LTE 8. WiMAX introduction Need for the extension of the range of Wi-Fi Key to Wi-Fis success:1. Simple Time Division Duplex protocol and flat IParchitecture.2. Base station could be plugged into simple DSL line. Goal of WiMAX- to extend Wi-Fi like services to an entirecommunity by using inexpensive components and licensed orunlicensed frequencies. Roger Marks founded 802.16 (WiMAX) working group in1998 and has chaired the committee since then. WiMAX combines the cellular range with the Wi-Fi speed. Itplugs into Ethernet like Wi-Fi and provides roaming voiceand data like cellular. 9. WiMAX standards First wireless MAN air interface standard in 2001 (use above10GHz)- approved WiMAX 802.16a original WiMAX specs inJanuary 2003 Followed by 802.16d (fixed WiMAX) in 2004 which addedthe MIMO. Further came in 802.16e (mobile WiMAX) which added themobility factor Current version is 802.16j which added multihop relay Future standards of 802.16m, 802.16n and 802.16p are inprogress which will bring in advanced air interface with higherdata rates of 100mbps for mobile and 1Gbps for fixed servicesalong with higher reliability of network and FDD along withTDD. 10. WiMAX specifications Distances up to 50kms (30 miles) for point to point(line ofsight) communication and up to 8kms (5miles) for point tomultipoint (non line of sight) communication 20MHz WiMAX channel - speeds of up to75Mbps(theoretically) for users near the B.S. , practically onlyup to 45Mbps Frequency reuse and B.W. range from 1.5MHz to 20MHz It uses licensed spectrum of : 2.3GHz, 2.5GHz and 3.5GHz aswell as unlicensed spectrum of 3.65GHz and 5.8GHz. 11. WiMAX architecture 12. LTE explained Evolves form third generation technology based on WCDMA. Supports higher peak data rate through wider bandwidth. Provides Low Latency and Overhead (Radio Delay