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The IEEE 802.16 WirelessMAN Standard for Broadband Wireless Metropolitan Area NetworksITU-APT Regional SeminarBusan, Republic of Korea10 Sept 2004

Ken StanwoodCEO, Cygnus Multimedia Communications

Vice-Chair, IEEE 802.16 Working Grouphttp://WirelessMAN.org

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Broadband Wireless Access

The Problem to Solve

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The World Wants Access

l All over the world:�Users want access to networks�Network operators want access to customers�Users want diverse media simultaneously

l Broadband Wireless Access flourishes where:�Many users are dissatisfied with their access�Network operators need to reach customers

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Market Segments for Wireless Access

ResidentialSOHO

SmallBusiness

MediumBusiness

Multi-Tenant

Residential

LargeBusiness

Addressable Markets

PointPoint--toto--Multipoint Multipoint 1010--40GHz40GHz

Fiber

150 Mbps

50 Mbps

20 Mbps

10 Mbps

2 Mbps

500 kbps

56 kbps

1 Gbps

Dat

a R

ate

FSO

PtP

MobileBackhaul

xDSL, Cable

PmP<11 GHz

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Broadband Access to Buildings

l The “Last Mile”� Fast local connection to network

l Business and residential customers demand it� Data� Voice� Video distribution� Real-time videoconferencing

� Gaming applications

l Network operators demand itl High-capacity cable/fiber to every user is expensive

� Construction costs do not follow Moore’s Law

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WirelessMAN: Wireless Metropolitan Area Network

Residentialcustomer

repeater SMEcustomer

Multi-tenantcustomers

SOHOcustomer

Basestation

Basestation

Source: Nokia Networks

Corenetwork

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802.16 in Metro Ethernet

OpticalMetro Ethernet

CE

CE

EthernetUNI

EthernetUNI

EVC 1

EVC 2

EVC 3 EthernetBackhaul

802.16Base

Station

802.16SS

802.16SS

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Vision - Wireless Multimedia Distribution

802.16d

CordlessPhone

PocketPC

Guaranteed and Best Effort Access

CBR TDM Voice

Best Effort Access

Real-Time Video

2xHDTVBroadband Service

802.16d

Gaming

Real-Time Video2xHDTV

Tablet PCwith

Camera

802.16d

802.16/11802.16/11

WiMAX802.16/11

AP

Set TopBox

Real

-Tim

e Vi

deo

2xHD

TV

HDTV

Gua

rant

eed

Dat

a A

cces

s

802.16d802.16d

802.16, Cable, DSL, IP

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Hierarchical Systems

INTERNETBACKBONE

Non Line of SightPoint to Multi-point

BACKHAUL

INDOORCPE

802.11 802.11 & &

802.16802.16

802.16

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Why 802.16 for Multimedia Wireless Networks?

l 802.16 provides TrueTrue QoSl Allows more efficient use of available spectrum than

other wireless technologiesl Better security, authentication, and protection against

theft of servicel Possibility to use both licensed and unlicensed

frequencies

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Properties of IEEE Standard 802.16

l Broad bandwidth� Up to 96 Mbps (>70 Mbps throughput) in 20 MHz channel (in

WirelessMANTM-OFDM air interface)

l Supports multiple services simultaneously with full QoS� Efficiently transport IPv4, IPv6, ATM, Ethernet, etc.

l Bandwidth on demand (frame by frame)l MAC designed for efficient used of spectruml Comprehensive, modern, and extensible securityl Supports frequency allocations from <1 to 66 GHz

� ODFM and OFDMA for non-line-of-sight applications

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Properties of IEEE Standard 802.16

l TDD and FDDl Link adaptation: Adaptive modulation and coding

� Subscriber by subscriber, burst by burst, uplink and downlink

l Point-to-multipoint topology, with mesh extensionsl Support for adaptive antennas and space-time coding

� Beamforming and MIMO

l Extensions to mobility are coming next.

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3rd Gen. Technology in 802.16

Adaptive TDDvariable asymmetry in a single

broadband channel best matchesbandwidth to demand

frequency

time Adaptive TDMATrue bandwidth on demand and

variable packet sizes providedifferentiated, bursty services

to multiple users

QPSK

Q16

distance

Adaptive Modulationvariable modulation maximizes

both air-link capacity and coverageQ64

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QAM-64QAM-64

99.993%~ 4 hrs/yr

85% of Channel Capacity99.95%*

~ 364 days 19.5 hrs/yr

100% of Channel Capacity99.999%,

~ 20 min/yr

70% Channel CapacityQPSK QAM-16 QAM-64

2-3km*

Modulation changes dynamically to match propagation path conditions

* Typical for .01% rain rate 40-50 mm/hr at 28GHz (egg. Chicago. SFO is about 35mm/hr)

QAM-16 QAM-64QPSK QAM-16 QAM-64

2-3km*

QAM-16 QAM-64

Coverage/Capacity Advantage of Adaptive PHY

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802.16 Supports Beamforming and MIMO

l High system gain for maximum coverage and availability

l Use for extended range or increased capacity

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IEEE 802.16 Working Group

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IEEE 802.16 Leadership

l Chair: Roger Marksl Vice Chair: Ken Stanwoodl Secretary: Dean Chang

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802.16a(Jan 2003)

• Extension for 2-11 GHz• Targeted for non line of sight, Point-to-

Multi-Point applications like “last mile” broadband access

802.16 Standards Genealogy

802.16(Dec 2001)

• Original fixed wireless broadband air Interface for 10 – 66 GHz

• Line -of-sight only, Point-to-Multi-Point applications

802.16c(2002)

802.16 AmendmentWiMAX System Profiles

10 - 66 GHz

• 802.16 Revision PAR for 802.16 & 802.16a to add WiMAX System Profiles and Errata for 2-11 GHz in support of 802.16e requirements

802.16e(2005 exp.)

• Amendment for Mobile wireless broadband up to vehicular speeds in licensed bands from 2-6 GHz

• Enables roaming for portable clients roaming for portable clients (laptops) within & between service areas(laptops) within & between service areas

802.16REVd(Sept 2004)

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802.16 and ETSI

l Over 50 liaison letters between 802.16 and ETSI� (European Telecom Standards Institute)

l ETSI HIPERMAN� Below 11 GHz�Healthy cooperation�Harmonized with WirelessMANTM-OFDM

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802.16 and ITU

l ITU-T January 2004:� 802.16 approved as draft recommendation for

wireless extension of cable operator footprint.� Included in-home

l ITU-R November 2004:� Liaison statement�Return statement from 802.16�Working towards ITU BWA recommendation

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WiMAX Purpose

l To promote a common broadband wireless standard

l To develop reduced scope “profiles” to ease development

l To fill the gaps in the IEEE process relative to the ETSI process

l To create a broadband wireless access conformance and interoperability certification process

l To act as a certification body

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Conclusion

l IEEE 802.16 WirelessMAN standards are:� open in development and application� addressed at worldwide markets� engineered as optimized technical solutions� significantly complete

– With test spec documents in development

� being enhanced for expanded opportunities