Presentation Of Wimax Basic Intro

WiMAX - a sneak preview Torbjörn 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 R2

R3

R1 MSS

ASN

CSN

R4

Another ASN

NSP

ASP Netw ork OR Internet

NAP

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ASN Reference Model ASN

R3 R6

R1 BS

ASN GW

R4 R8

BS

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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

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MAC Control Plane P H Y

MAC Data Plane Service Specific CS e.g. IP

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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?

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