CELLULAR COMMUNICATIONS WiMax. What is WiMax? Fixed WiMax

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Cellular CommunicationsWiMax1What is WiMax?

2Fixed WiMax

3Mobile WiMax

4WiMax is Not WiFi

5WiMax Indoor CPE

6P2P and PMP

7LOS and NLOS

8Antennas and Radios

9Adaptive Antenna Systems

10QoS

11QoS

12Fixed Wireless Applications

13Alternatives

14Low Barrier To Entry

1516Wireless Standards4 main usage segments are specifiedRange, Power,

16NDSLab [email protected] on the Path of Fixed/Mobile ConvergenceFixedMobileWill Convergence Wi-FiWCDMA802.16 (WiMAX)Spectrum2.4G, 5.8GHz (Unlicensed)Around 2GHz (Licensed)2~11, 10~66 GHz(Licensed, Unlicensed)Channel AccessContention-based Scheduled ScheduledBit RateUp to 54MbpsUp to 2MbpsUp to 75 MbpsMobilityFixed, PortableMobileFixed, Portable, MobileModulation SchemeCDMA, OFDMCDMAOFDM, OFDMATypical Communication Range100s meters10s kilo-meters10s kilo-meters17Comparison

1819Deployment of WiMAX ServiceSource: WiMAX Forum/Siemens

Backhaul FeedingPoint-to-point link for fixed infrastructureFixed Wireless AccessWireless local loop for hot-spot feedingNomadic AccessCPEs in hot-zone access the service directlyPortable/Mobile AccessHandover function enabling mobile data feeding19Mobile Performance Today802.16m leads in performance. 802.16e leads in performance and availability TechnologyRequired SpectrumStandards Completion (Expected)Peak Throughput (Mbps)Avg. Spectral Efficiency (bits/sec/Hz/Sector)Sleep to Active LatencyDLULDLUL802.16e/Mobile WiMAX Release 1.0 2x2 MIMO TDD 10 MHz(5:3)Dec. 200540 171.40.7< 40 msHSPA (Release 6) FDD2x5 MHzMar. 20051460.50.3250 msHSPA+ (Release 8)2x2 MIMO FDD2x5 MHzDec. 200842120.80.550 msLTE (Release 8) 2x2 MIMO FDD2x10 MHzMar. 200986381.60.810 msLTE (Release 10)4x4 MIMO FDD2x10 MHz(Q1 2011)160802.42.1