module 001 - what's wimax

8/6/2019 Module 001 - What's WiMAX

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All rights reserved 2005, Alcatel

Introduction to WiMAX

12th Sept 2006


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Whats WiMAX?

Worldwide Interoperability forMicrowave

Access.


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WiMAX Forum vs IEEE 802.16 Group

To define 802.16 standards To develop the testprocedures andcertifications that demonstrate

interoperability among WiMaxvendors' gear

A working group under IEEE Organization to certify thecompatibility and theinteroperability ofBWAproducts (specifically thosedescribed by IEEE 802.16 andETSI HiperMAN)

IEEE 802.16WIMAX Forum


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802.16 Standards History

Extension for 2-11 GHz: Targeted for non-line-of-sight, Point-to-Multi-Pointapplications like last mile broadband access

Original fixed wireless broadband air Interfacefor 10 66 GHz: Line-of-sight only, Point-to-Multi-Point applications

802.16 Amendment

WiMAX System Profiles

10 - 66 GHz

Adds WiMAX System Profiles for 2-11 GHz

MAC/PHY Enhancements to support

subscribers moving at vehicular speeds

802.16a

(Jan 2003)

802.16(Dec 2001)

802.16c

(2002)

802.16REVd(802.16-2004)

(Oct 2004)

802.16e(802.16-2005)

(Dec 2005)


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WiFi vs WiMAX

Mobility is possible. No Mobility

Up to 70Mbps Up to 54Mbps

Max~ 35km(~10km : 802.16e) max < 100m

QoS can be guaranteed QoS not guaranteed

Metropolitan Area Network(MAN)

Hotspot or LAN

Use licensed and unlicensedspectrum

Use unlicensed spectrum 802.16d/e standards 802.11a/g standards

WiMAXWiFi


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WIMAX FDD and TDD Profiles

Guard time required betweenDL and UL

Guard channel requiredbetween DL and UL

Cost higher Cost lower as same filters,mixers etc. for transmitter and

receiver

Not efficient for asymmetricoperations, but suitable forVoice and E1 backhauling.

Little waste of spectrum forasymmetric operations

Difficult to support multiplenational FDD spectrumallocation

Easier to support multiplenational TDD spectrumallocation

A pair of spectrum blocksrequired for DL and UL

Same frequency spectrumblock for DL and UL

FDDTDD


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WiMAX Forum Certification Process


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WiMAX Standardisation Definition of Profile


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Summary

WiMAX Forum certify products follow 802.16 and ETSIHiperMAN.

IEEE 802.16 group defines standards for PHY and MAC.

WiMAX is extension of WiFi, with capability to guaranteequality of service and provide mobility.

Initial WiMAX product focus on TDD mode as it is ideallyfor transport of asymmetric traffic and lower cost formodem.

module 001 - what's wimax

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