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Next-generation Mobile Broadband OFDMA & Flatter IP Architecture

Glenn LaxdalVP CDMA Product Line Management

October 10, 2007

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What & Why OFDMA?Evolution Air Interface for all 4G Technologiesw/ Magnitude Increase in Spectral Efficiency

•OFDMA = Orthogonal Frequency Division Multiple Access

•Why OFDMA?Scalable w/ higher spectral efficiency = flexible deployment with significantly more users and/or higher data rateMore robust w/ less multi-path interference.Lower cost w/ simpler radio receiver.

TDMA, GSM,GPRS, EDGEAMPS, TACS, NMT

UMB, LTE, WiMAX CDMA, UMTS

1G 2G

3G4G

Freq

Time

FDM

A

TDM

AC

DM

A

OFD

MA

Freq

Time

Freq

TimeTimeFreq

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Flatter IP ArchitectureHigher Reliability & Better Performance

• All IP access with focus on packet data providing seamless integration with all IP core, e.g. MMD.

• Flatter architecture = higher reliability w/ less hierarchy• Flatter architecture = lower latency & faster response

IMS

Access Network Points

Gateway

PSTN Internet

PDSN

RNC

InternetIMSPSTN

3G Network Today Next Generation Network

5Nortel Confidential Information

Drivers for Next-Gen OFDM TechnologyCapacity for more applications & Hyperconnectivity

3G Applications Today• Voice users: ~ 44 (1.25 MHz DO)• Avg data rate: 600–1400 kbps DL,

and 500 – 800 kbps UL• Latency in 50-100 msec

•QoS: Real-time Applications

Voice-Centric Handsets

Data-Centric PC Cards

Applications by Next-Gen Mobile BB• Voice capacity: up to 500 users (UMB 10 MHz)

• Avg data rate (10MHz FDD): 19 Mbps DL & 9.65 Mbps UL*• Latency in 15-20 msec & QoS for Real-time Applications

Broadband consumer devices

All Today Apps e.g. CDMA, Rev A, UMTS, HSPA+, etc.U

LTRA

BR

OA

DB

AN

DCapacity to support all the

broadband consumer devices, not just handset and data cards

&+

Hyper-connectivity

* UMB 64QAM 10MHz FDD MIMO 2x2 DL and 1x2 UL