Copyright © 2005 TietoEnator Corporation

WiMAX - a sneak previewTorbjörn Lundmark

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Agenda

WiMAX overview– Market– Technology– Standard update

WiMAX architecture– Network architecture– OFDM– MAC/PHY

Summary

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Today's Wireless Market

End-user are used to high bandwidth from fixed sources– Expects the same behaviour from wireless

The initial launch of WCDMA has not been a success– ~30 million subscriber where half in NTT DoCoMo NW– 2/3 of the subscriber added as late as 2005– Initial 3G promises far from fulfilled (wireless video, coverage, etc)

A “need for speed” required from existing telco operators – Afraid of being left behind– Competing with wireless MAN provider – Needs to be prepared for future growth of data traffic – Protect their 3G investment

A need for lower rural coverage cost

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3G Evolution (source: Nokia)

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What is WiMAX, 802.16d and e

A specification of 915 pages accepted in 2004. A member of the IEEE802 family of specifications.

IEEE802.16-2004 include P2P, P2MP and mesh access networks

2-11GHz NLOS 10-66 GHz LOS During 2005 IEEE 802.16e includes mobility. During 2005 MIB standardized as well IEEE802.16 is supported by the industry group WiMAX IEEE802.11 is supported by the industry group WiFi

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WiMAX vs. 3G, pros and cons

Cost– Lower equipment cost for WiMAX due to certified products (compare with

WiFi)– WiMAX require new infrastructure while HSPA rides on UMTS

Coverage– Roughly the same coverage (average ~5 km)

Performance– Roughly the same performance (average ~2 Mb/s per user)

Market window– HSDPA launches in 2006 while HSUPA will come in 2008?– WiMAX standard set end of 2005 -> first products in 2007

Acceptance– HSPA has a higher acceptance with mobile operator

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WiMAX architecture End-to-End Reference Model

NSP

NAP

R1 R3

MSS

R2

ASN CSN

ASP Netw ork ORInternet

R4

Another ASN

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ASN Reference Model

ASN

ASN GW

R6

BS

BS

R8

R1

R3

R4

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WiMAX BS architecture

OFDM– Modulation technique, spread spectrum– Used in e.g DSL, WLAN, WiMAX

MAC, control plane, user plane– Manage resources on the air interface– QoS– ARQ– Mobility Management– Radio Resource Management– Location

PHY– OFDM– MIMO– Modulation

PHY

Service Specific CS

e.g. IP

MACControlPlane

MACDataPlane

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Summary

Standard for WiMAX mobile solution not finalized yet No products certified by WiMAX forum yet Test network in Skellefteå shows promising results According to analysts WiMAX will take significant market shares

Which standard will rule next–generation broadband wireless?