1xEV-DO + VoIP = CDMA Operator Advantage

1xEV-DO + VoIP =

CDMA Operator Advantage

Randy Battat

President and CEO

Airvana, Inc.

CDMA Americas Conference

September 2005

Why VoIP?

“It’s probably the most significant paradigm shift in

the entire history of modern communications, since

the invention of the telephone.”

Michael Powell

Chairman, US FCC

World Economic Forum

Davos, Switzerland

January, 2004

CDMA VoIP Advantage

• DO/Rev. A Networks Are The Best

Technology For VoIP

– No other wide area wireless technology will be

able to match the performance.

– Greater Erlang capacity than 1xRTT.

• Wireless carrier VoIP opens up vast new

business opportunities in wireless/wireline

convergence:

– Capitalize on the rapid migration to VoIP for

residential and business use.

Voice Connectivity Options

PSTN

POTS

Cellular Cellular SP

Broadband ISPs have been

providing data access for a somewhat shorter period of time.

ISPs have been

providing data access for a somewhat shorter period of time.

Internet

Internet SP

For 20 years consumers have been able to use landline telephony providers as well as cellular service providers.

For 20 years consumers have been able to use landline telephony providers as well as cellular service providers.

Cellular Operators Attract Landline Customers

wireless phone at home within the next two years.”

“39 percent of adults who use a landline said they are likely to give it up and use only a

wireless phone at home within the next two years.”

National Consumers League, July 2005 http://www.mobiledia.com/news/33576.html

However, new competitors are on the scene

Your broadband connection … it’s not just for data anymore.

GW

And they are making headway

PSTN

Cellular Cellular SP

Internet

Internet SP

“46 percent of those who have heard of VoIP (Voice over Internet Protocol) said it was likely that they would switch from their traditional

landline service to this technology.”

“46 percent of those who have heard of VoIP (Voice over Internet Protocol) said it was likely that they would switch from their traditional

landline service to this technology.”

National Consumers League, July 2005 http://www.mobiledia.com/news/33576.html

POTS

The VoIP Opportunity for CDMA Operators

• Competitive advantage relative to other

wireless technologies

– VoIP demands network support

– 1xEV-DO has it. Others do not.

• Competitive advantage relative to wireline

VoIP operators

– CDMA operators have wide-area mobility.

Others do not.

Superior to 1xRTT

1xRTT Targets

•Per Sector Capacity: > 26 Erlangs •End-to-End Latency: < 285 ms

•Seamless Mobility: comparable to

1x soft handoff

•Voice call setup time: < 2

seconds

•Voice signal quality: > 8 kbps

EVRC vocoder quality; Frame loss rate < 2% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 120 140 160 180 200 220 240

End-to-end delay [msec]

C ov er ag e _{20 Erlangs} 30 Erlangs 40 Erlangs

Latency and

quality of

1xRTT…

… at

capacities of

up to 40

Erlangs!

1xEV-DO is the technology for wireless VoIP

HSDPA (R5) Data Channel comparable to 1xEV-DO Rev 0, not Rev A

High capacity reverse link

DSC Channel for fast sector switching Data over Signaling

Intra-user QoS with Multiple RLP Flows Low-latency Reverse Link

Reverse Link Hybrid ARQ

Adaptive Modulation and Coding Channel Quality Feedback

Forward Link Hybrid ARQ

Proportional Fairness Scheduler at BTS

Q4’2006E Q4’2006E

06/2002 Commercial Network Launch

EVDO RevA HSDPA

EVDO Rev0 Technology Enablers

1xEV-DO and UMTS Roadmap

Typical Reverse Data Rate (Mbps) 1.5 .384 .064 1.8 .144

Peak Reverse Data Rate (Mbps) .5-.7 .4-.7 .064-.3 .5-.6 .4-.5

Typical Forward Data Rate (Mbps) 14.4 3.6 .384 3.1 2.4

Peak Forward Data Rate (Mbps) 5 5 5 1.25 1.25 Carrier Size (MHz) UMTS HSDPA/ HSUPA R6 UMTS HSDPA R5 UMTS R99 1xEV-DO Rev. A 1xEV-DO Rev. 0

UMTS Evolution to VoIP

• UMTS HSDPA/HSUPA, like 1xEV-DV, is an evolution

of a circuit-based technology

• UMTS evolution is constrained by requirement to

maintain circuit-based voice and data services

– HSDPA/HSUPA systems must continue to support voice

services using a circuit model

– As in IS-2000/1xEV-DV, UMTS can continue to rely on

existing circuit voice services

– Optimization for VoIP has not been a priority; initial support for

UMTS VoIP services is not available until HSDPA/HSUPA R6

(2008?)

• UMTS HSDPA/HSUPA system designs are hampered

by circuit service legacy compatibility requirements

Contrasting 1xEV-DO to HSDPA/HSUPA

• 1xEV-DO has been designed from inception as a packet

data technology

– 1xEV-DO systems are based inherently on an all-IP

architecture

• 1xEV-DO is optimized for VoIP operation

• 1xEV-DO implementations are committed to VoIP/IMS

service model

• Examples:

– Optimized MAC/PHY design for VoIP frame formats

– Low-latency VoIP packet delivery while maintaining

packet-oriented opportunistic scheduling for optimal VoIP capacity

– Data Source Control (DSC) for seamless cell selection

UMTS HSDPA/HSUPA standards and products are still in catch-up

mode compared to 1xEV-DO for evolution to VoIP/IMS Model

VoIP Infrastructure Opens New Markets

With VoIP infrastructure in place, 1xEV-DO operators can re-capture the flow of voice users away from POTS providers, and also from stand-alone VoIP

With VoIP infrastructure in place, 1xEV-DO operators can re-capture the flow of voice users away from POTS providers, and also from stand-alone VoIP

1xEV-DO Operators will Own Wireless/Wireline

Convergence

Summary

• VoIP is a major change to the communications

landscape

• Wireless VoIP will enable wireless/wireline service

integration

• 1xEV-DO Revision A will provide all the tools

needed for a carrier class VoIP service

• EV-DO operators will have a competitive edge over

both other wireless technology operators, and pure

VoIP service providers.