Confidential and Proprietary1

CDMA 2000 Roadmap

2007 3G CDMA Latin American

Regional ConferenceMay 15th

David Nowicki

All data and information contained in or disclosed by this document are confidential and proprietary information of Airvana Incorporated, and all rights therein are expressly reserved.

By accepting this material, the recipient agrees that this material and the information contained therein are held in confidence and in trust and will not be used, copied, reproduced in whole or in part, nor its contents revealed in any manner to others without the express written permission of Airvana Incorporated.

Information in this document is preliminary and subject to change and does not represent a commitment on the part of Airvana Inc.

Airvana Fact Sheet

• Founded in 2000• Global HQ in Boston, Massachusetts, USA• Approaching 500 employees• Leadership in EVDO Mobile Broadband

– Installed in over 30 commercial networks around the world– Also for Air-to-Ground; Public Safety & government systems

• Innovation in Fixed Mobile Convergence• OEM Partnerships with Nortel, Alcatel-Lucent,

Qualcomm

Confidential and Proprietary4

Airvana Product Overview

AirVista™EMS

UniversalAccess Gateway (UAG)

skyBTS™

EV-DO Channel Cards And Software in OEM Base Station

Internet

Mobile Voice and Data Devices

Wi-Fi and Femtocells

Macro Access

Fixed-Mobile Convergence

Core Network

OperatorCore Network

IP Radio AccessNetwork (IP-RAN)

IP-RANFlat-Architecture

EV-DO Base Station

Radio Network Controller (RNC) Packet Data

Serving Node (PDSN)

www.cdg.org

CDMA2000 Evolution Path

WCDMA Evolution Path

CDMA2000: TimeCDMA2000: Time--toto--Market LeadershipMarket LeadershipOFDMCDMA/TDMCDMA

HSPA+Phase 25

HSPA+Phase 15

Rel-6HSUPA

Rel-5HSDPA

Rel-99WCDMA

UMB3

EV-DORev B1

EV-DORev A1

CDMA20001xEV-DO

Rel-7 Rel-8

CDMA20001X

LTE6

DL: 153 kbpsUL: 153 kbps

(1.25 MHz)

DL: 2.4 MbpsUL: 153 kbps

(1.25 MHz)

DL: 3.1 MbpsUL: 1.8 Mbps

(1.25 MHz)

DL: 6.2 – 73.5 Mbps2

UL: 3.6 - 27 Mbps2

(2.5 – 20 MHz)

Requirement:DL: 140 - 291 Mbps4

UL: 34 – 79 Mbps (10 – 20 MHz)

DL: 384 kbpsUL: 384 kbps

(5 MHz)

DL: 1.8 - 7.2 MbpsUL: 384 kbps

(5 MHz)

DL: 1.8-14.4 MbpsUL: 5.72 Mbps

(5 MHz)

Requirement:DL: 150 MbpsUL: 50 Mbps

(20 MHz)

Target:DL: 14 - 42 Mbps

UL: 11 Mbps(5 MHz)

Note: timeline depicts initial commercial availability of each technology. Those introduced beyond 2008 are under standardization and are subject to variability1 EV-DO Rev A and Rev B incorporate OFDM for multicasting.2 Data rates are based on 64 QAM and a 2x20 MHz FDD band allocation and are scalable with the number of carriers assigned. Up to 15 carriers, up to 4.9 Mbps per carrier.3 Multiple modes supported: CDMA, TDM, OFDM, OFDMA, LS-OFDM. New antenna techniques used: 4x4 MIMO and SDMA. Leverages EV-DO protocol stack.4 Data rates are based on 2x20 MHz FDD band allocation and 4x4 MIMO. Data rate depends on the level of mobility. 5 Upper range of DL peak data rates for Release 7 and Release 8 introduce enhancements is based on 64 QAM, 2x2 MIMO.6 Initial requirements are based on OFDMA in the DL and SC-FDMA in the UL, FDD, 64 QAM, 2 TX MIMO in DL, and 16 QAM single TX stream in UL.

VoIP

200620052004200320022001 2007 2008 2009 2010

VoIP

VoIP

OFDM/OFDMA/MIMO/SDMAMIMO

The CDMA2000 Roadmap enables new revenueThe CDMA2000 Roadmap enables new revenue--generating services earliergenerating services earlier

Significant timeSignificant time--toto--market competitive advantagemarket competitive advantage

Radio Technology Evolution Roadmap

Rev A Commercial Deployments to Date

Telesystems or Ukraine MTS First Wireless (Nigeria)

Arobase Telecom (Cote d’Ivoire)

Movistar (Venezuela) Bermuda Digital Communications (BDC)

Telefonica O2 (Czech Rep)Skytel (Mongolia)EOCG (Caribbean)

Movilnet (Venzuela)

Mobilkom (Czech Rep)

Tatem Telecom (Dem. Rep. of Congo)

Rev A User Feedback Summary

• Reached the tipping point– Service comparable to Home DSL– Often higher speeds than WIFI hotspots

• Forward Link: Average 700 to 1.1 Mbps• Reverse Link: Average 400 to 600 Mbps• Met 5x improvement expectation on reverse link

heavy apps like email, photo upload, etc.• Surprised by significant improvement in forward link

apps – Rev A web browsing 2x faster than rev 0!– Improvements for handset web browsing expected to be

even larger

100% Annual Growth in Wireless Data

$0$1,000$2,000$3,000$4,000$5,000$6,000$7,000$8,000$9,000

2004 2005 2006 2007

$M Verizon

Sprint Nextel

Confidential and Proprietary9

• Wireless data growing at almost 100% per year• Data ARPU is currently 17.4% at Verizon, 16% at Sprint

• Sprint CDMA Data ARPU >20% Source: Company filings , Airvana Estimates

Next Steps in Rev A• From data cards to multimedia handsets• Better consumer awareness of mobile broadband• Highlighted New Services

– QChat and other PTT services– VOIP deployment

• Network already equipped with QoS• Many trials this year

– Push to Video– Open, full HTML browsing

• Web sites• Videos

• Preparation for Rev B…

Rev B Summary

• Simple, software upgrade delivering 2-3x average improvement in user experience

• Fully backward compatible to Rev-A with seamless mobility

• Growing industry support given success of Rev A deployments; trials this summer

• Allows EV-DO operators to stay ahead of competing technologies like HSxPA and WiMAX

• Application experience on road to 4G• Further enhancements to Rev. B over time

Speed comparison at glance

2.4

0.153

3.11.8

9.3

5.3

0

2

4

6

8

10

Mbps

Rev-0, Rev-A and Rev-B speed comparison

Forward link Reverse link

Forward link 2.4 3.1 9.3

Reverse link 0.153 1.8 5.3

Rev-0 Rev-A Rev-B

Three Small Pipes

Rev A Compared with Rev B

Carrier#1

Carrier#2

Carrier#3

User A User B User C

Carrier#1

Carrier#2

Carrier#3

User A User B User C

Rev A1 Carrier per User

Rev BMultiple Carriers per User

One Larger Pipe

RevB Video.wmv

Easy Upgrade from Rev A to Rev B

RF

REV A

RF RF RF

REV B

REV B

REV B

BTS

1xDO

RF RF

REV B

REV B

2xDO 3xDO

• Same carrier addition procedure as Rev A• Same channel card hardware as Rev A with Rev B software

– Full reuse of installed Rev A hardware• Option to serve two carriers with one channel card

– Upgrade from Rev A to Rev B 2xDO without a new channel card

ChannelCard

Rev B is Fully Backward Compatible

• Rev B carriers continue to serve Rel 0/Rev A EV-DO devices• Focus multi-carrier deployments initially on high-traffic areas• Smooth handoffs at revision boundaries• Rev A and Rev B User both benefit in a mixed network

Carrier #1

Rev BRel 0Rev A

Rel 0Rev A

Rev A Rev B

Rev BRel 0Rev A

Rev B

Rev B Rev B Rev B Rev B

Carrier #1

Carrier #2

Carrier #1

Carrier #2

Carrier #3

www.cdg.org*Based on 2x20 MHz FDD band allocation and 4x4 MIMO. Latency is based on a 32-bit Return Trip Transmission (RTT).VoIP capacity is dependent upon the feature set enabled and network load.

• Combines the best aspects of CDMACDMA,, TDMTDM,, LSLS--OFDMOFDM,, OFDMOFDM, and, and OFDMAOFDMA into a single air interface using sophisticated control and signaling mechanisms and advanced antenna techniques:

− Multiple Input Multiple Output (MIMO) and Space Division Multiple Access (SDMA)− Channel Bandwidths: 20 MHz20 MHz, 15 MHz15 MHz, 10 MHz10 MHz, 5 MHz5 MHz and 1.25 MHz1.25 MHz

• Will deliver ultra-high fixed, portable and mobile broadband performance*:− Forward link: up to 291 Mbps up to 291 Mbps while mobile while mobile − Reverse link: up to 79 Mbps up to 79 Mbps while mobile while mobile − Average network latency: 16.8 msec16.8 msec− Voice over IP (VoIP): up to 1000 simultaneous usersup to 1000 simultaneous users while mobile while mobile

• Will enable the convergence of IP-based voice, broadband data, multimedia, information technology, entertainment and consumer electronic services

• Commercial availability is expected in early 2009early 2009

Ultra Mobile BroadbandUltra Mobile Broadband™™ (UMB): An Overview(UMB): An OverviewA technological breakthrough in OFDMAA technological breakthrough in OFDMA--based broadband servicesbased broadband services

www.cdg.org

UMB: Network ArchitectureUMB: Network ArchitectureUMB enables an evolution to a UMB enables an evolution to a ““flatflat”” IPIP--based network architecturebased network architecture

Fewer Network Nodes, Lower Latencies and Better PerformanceFewer Network Nodes, Lower Latencies and Better Performance

InternetInternet

RNC

PDSN

RF Antennas(BTS)

EVEV--DODO

InternetInternet

Gateway

IMS

IP-basedRF Antennas

(Access Points)

IP Network (Ethernet)

PSTN

www.cdg.org

•• Baseline Configuration: Single Input Single Output (Baseline Configuration: Single Input Single Output (SISOSISO), with receive diversity), with receive diversity

•• Multiple Input Multiple Output (Multiple Input Multiple Output (MIMO) MIMO) configuration, up to 4x4 MIMO:configuration, up to 4x4 MIMO:

−− Provides higher spectral efficiencyProvides higher spectral efficiency

−− Higher peak data rateHigher peak data rate

−− Higher data throughput ratesHigher data throughput rates

•• Spatial Diversity Multiple Access (Spatial Diversity Multiple Access (SDMASDMA) )

−− Reduced interferenceReduced interference

−− Better cell coverageBetter cell coverage

•• Combining MIMO with SDMA optimizes network performanceCombining MIMO with SDMA optimizes network performance

UMB: Advanced Antenna TechniquesUMB: Advanced Antenna TechniquesUMB incorporates the latest breakthroughs in antenna designsUMB incorporates the latest breakthroughs in antenna designs

Higher Spectral Efficiency and Better Cell CoverageHigher Spectral Efficiency and Better Cell Coverage

www.cdg.org

UMB: TimeUMB: Time--toto--Market LeadershipMarket LeadershipUMB will enable new services earlierUMB will enable new services earlier

First to Deliver Ultra Mobile Broadband ServicesFirst to Deliver Ultra Mobile Broadband Services