Copyright © 2005 TietoEnator Corporation WiMAX - a sneak preview Torbjörn Lundmark

Copyright © 2005 TietoEnator CorporationPage Agenda  WiMAX overview –Market –Technology –Standard update  WiMAX architecture –Network architecture –OFDM –MAC/PHY  Summary

Copyright © 2005 TietoEnator CorporationPage 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

Copyright © 2005 TietoEnator CorporationPage G Evolution (source: Nokia)

Copyright © 2005 TietoEnator CorporationPage What is WiMAX, d and e  A specification of 915 pages accepted in A member of the IEEE802 family of specifications.  IEEE include P2P, P2MP and mesh access networks  2-11GHz NLOS GHz LOS  During 2005 IEEE e includes mobility.  During 2005 MIB standardized as well  IEEE is supported by the industry group WiMAX  IEEE is supported by the industry group WiFi

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Copyright © 2005 TietoEnator CorporationPage 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 > first products in 2007  Acceptance –HSPA has a higher acceptance with mobile operator

Copyright © 2005 TietoEnator CorporationPage WiMAX architecture End-to-End Reference Model

Copyright © 2005 TietoEnator CorporationPage ASN Reference Model

Copyright © 2005 TietoEnator CorporationPage 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 PHYPHY Service Specific CS e.g. IP MAC Control Plane MAC Data Plane

Copyright © 2005 TietoEnator CorporationPage 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?