CELLULAR COMMUNICATIONS WiMax. What is WiMax? Fixed WiMax.
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Transcript of CELLULAR COMMUNICATIONS WiMax. What is WiMax? Fixed WiMax.
CELLULAR COMMUNICATIONS
WiMax
What is WiMax?
Fixed WiMax
Mobile WiMax
WiMax is Not WiFi
WiMax Indoor CPE
P2P and PMP
LOS and NLOS
Antennas and Radios
Adaptive Antenna Systems
QoS
QoS
Fixed Wireless Applications
Alternatives
Low Barrier To Entry
16
Wireless Standards 4 main usage segments are specified
Range, Power, …
NDSLab Copyright@2008
17
WiMAX on the Path of Fixed/Mobile Convergence
Fixed
Mobile
Will Convergence
Wi-Fi WCDMA 802.16 (WiMAX)
Spectrum 2.4G, 5.8GHz (Unlicensed)
Around 2GHz (Licensed)
2~11, 10~66 GHz(Licensed, Unlicensed)
Channel Access Contention-based Scheduled Scheduled
Bit Rate Up to 54Mbps Up to 2Mbps Up to 75 Mbps
Mobility Fixed, Portable Mobile Fixed, Portable, Mobile
Modulation Scheme CDMA, OFDM CDMA OFDM, OFDMA
Typical Communication
Range100s meters 10s kilo-meters 10s kilo-meters
Comparison
Speed Price Ubiquity Convenience Localization
Key Value Offerings
Rel
ativ
e Le
vel
3GWLANWiMAXwired
19
Deployment of WiMAX Service
Source: WiMAX Forum/Siemens
Backhaul Feeding Point-to-point link for fixed
infrastructure Fixed Wireless Access
Wireless local loop for hot-spot feeding
Nomadic Access CPEs in hot-zone access
the service directly Portable/Mobile Access
Handover function enabling mobile data feeding
Mobile Performance Today
802.16m leads in performance. 802.16e leads in performance and availability
Technology Required
Spectrum
Standards
Completion
(Expected)
Peak Throughput
(Mbps)
Avg. Spectral Efficiency
(bits/sec/Hz/Sector)
Sleep to Active
Latency
DL UL DL UL
802.16e/Mobile WiMAX Release 1.0 2x2 MIMO TDD
10 MHz(5:3)
Dec. 2005 40 17 1.4 0.7 < 40 ms
HSPA (Release 6) FDD
2x5 MHz Mar. 2005 14 6 0.5 0.3 250 ms
HSPA+ (Release 8)2x2 MIMO FDD
2x5 MHz Dec. 2008 42 12 0.8 0.5 50 ms
LTE (Release 8) 2x2 MIMO FDD
2x10 MHz
Mar. 2009 86 38 1.6 0.8 10 ms
LTE (Release 10)4x4 MIMO FDD
2x10 MHz
(Q1 2011) 160 80 2.4 2.1 <10ms
802.16m4x4 MIMO TDD
20 MHz(5:3)
(Q3, 2010) 170 90 2.9 2.5 <10 ms