WiMAX Networking and Business Solution

Presented by

Mehdy Mahmood

Wireless Access Technologies

2. WirelessLANs

(802.11)

1. Cellular(CDMA, GSM)

3. BroadbandWirelessAccess

• Outdoor• Mobile • Medium data rates• Voice & Data• Successful Deployment

• Enterprise/Hotspots• Fixed• High data rates • Data only• Successful Deployment

• Outdoor• Fixed• High data rates• Mostly Data• Disappointing

Deployment

Technology

Tech 1. Mobile Cellular Networks

• Analog cellular technology such as AMPS• Service: Voice

• Digital technologies; TDMA, CDMA• Services: Voice, Low-rate data, SMS

• 2.5G: GPRS/EDGE, 3G: UMTS, CDMA2000• Services: Voice, High-speed data, MMS

3.5 Generation

(2005)

• HSDPA & HSUPA & 1xEV-DO (Rev A)• Service: High-speed data

1st Generation

(1980s)

2nd Generation

(1995)

2.5G/3G (2000)

Technology

Tech 2. Wireless LANs

• First version• Data rates of 2 Mbps

• Widely deployed• Data rates up to 11 Mbps

• Current Deployment• Data rates up to 54 Mbps

• Next Gen Wireless LANs• Data rates over 100 Mbps

802.11(1997-98)

802.11a

802.11b(“Wi-Fi”)

(2000)

802.11b/g(2004)

802.11n(2007)

Technology

Tech 3. Broadband Wireless Access (BWA)

• Typically deployed for fixed wireless access applications– An alternative to DSL– Emerging markets and rural areas– Suitable for cellular backhaul

• Relatively new technologies– In existence since 2000

• Commonly use non-cellular spectrum over 2 GHz

No support for mobility, mostly proprietary systems with lack of support from major vendors and service providers.

Technology

802.16/WiMAX – Best of BWA

802.16/WiMAX Support for

high data rates

Open standards

based network

Support for Mobility &

Next Generation

services

Support from major industry

players

IEEE 802 CommitteePhysical Layer- RF, Power, Modulation, Coding- Fixed and MobileMAC Layer- Framing, Security, Scheduling- Handover/MobilityStandards- 802.16d and e

WiMAX ForumEnd-end NetworkingSignaling, Network Mobility-MessagingStandardsEquipment Certification- Europe and Asia

Technology

WiMAX Defined

Differentiated Wireless Access Technology which provides high Data Rates, that are allotted flexibly, with built in QoS and Security, supported through complex scheduling algorithms, at a relatively lower cost.

Technology

Mobile Wireless Multiple Access Technologies

Built in MACNANA8 QoS & Security

<15 Mbps> 400 Kbps9.6-64 Kbps6 Data rate

Full Mobile, HDStreamingNA7 Video

Sprint, ClearwireVerizon, Sprint, Alltel

AT&T, Cingular, Nextel

9 Examples

DataVoiceVoice4 Optimized for

60 Kbps (VoIP)4-8 Kbps8-12 Kbps5 Voice BW

Varying in time and freq.Not applicableFixed3 BW Allocation

2.5-3.5-5 GHz; may also use Cellular and PCS

Cellular and PCS(900, 1800/1900,

2100)

Cellular and PCS(900,1800/1900)

2 Spectrum (MHz except where noted)

Varying frequency assignment per service

OFDMA(802.16e/WiMAX)

Dedicated Code per user

Dedicated time slots per user

1 Technique

(W)CDMACDMA2000

TDMAGSM/GPRS

Bold font = strength of the technology

Technology

Competition to WiMAX

WiFi 3G Cellular

Provide additional bandwidth for data centric applications

3G and emerging 4G Fixed/Wireline

Cable, DSL, FTTP

Competition

Competitive Access Technologies (Q1 2007)

15Mbps15Mbps

8Mbps1Mbps15Mbps4 Data rate*

20-25 KM1 KM1 KM2-5 KM50 M5 Distance

Streaming, HD

HDStreaming, HD

StreamingStreaming7 Video

MAC/IPIPIPIPMAC/IP8 Security

MACMACATMTDM/ATM

MAC9 QoS

MobileFixedFixedMobilePortable10 Mobility

LowLowhighMediumLow11 Cost (incr)

FlexibleFixedSemi-fixed

Semi-fixedFixed3 BW Allocn

LicensedSharedDedicated

LicensedUnlicensed2 Spectrum

FDMA

Cable

OFDM

xDSL

OFDMAT/F/CDMAOFDM/TDM

1 Technology

802.16d/e WiMAX

Cellular 3G

WLAN

* Typical of the several possible Bold font = strength of the technology

Competition

Benefits of WiMAX Applications

– Fixed/portable wide area services •Residential/SOHO high speed

Internet access•Voice/Internet access•Public safety, private MAN

networks– Mobile access services

•Cellular voice and high speed data

– Cellular and WLAN/Hot spot backhaul services

Considered a key differentiator

Benefits

Applications for WiMAX

• Solutions for High Data Rates over Large Distances

• Convergence of IP Based Network• Triple Play – Data, Voice and Video• BWA in Rural Areas – Last Mile• VoIP, Gaming, Streaming Video,

Internet

Key Features of IEEE-802.16e-2005

High capacity Wide Coverage NLOS coverage System Gain Security Resistance to Maltipath interface QoS Mobility

High Data Rates Can Create

New Business Opportunities

WiMA

X fits

here!

Benefits

WiMAX Topology

WiMAX and Wi-Fi metro-access solution

WiMAX as a client connection option.

Urban Business Case

Source: The WiMAX Forum White Paper

Cost

Critical Success Factors

Spectrum issues resolved

Harmonization with 3G Attractive price points

Forecast

Who is Interested in WiMAX?

0%

5%

10%

15%

20%

25%

30%

35%

Su

rveyed

Op

era

tors

Source: Pyramid Research

How Wide the divide?

At Present ITU estimates that around 800,000 villages or 30% all villages worldwide, are still without any kind of connection.

Major barriers to broadband ICTs access deployment

How WiMAX will break the barriers to broadband ICTS

OFDM & OFDMA

OFDM & OFDMA features

In OFDM, user devices are assigned time slots for transmission, but only one user device can transmit during a single time slot. In OFDMA, sub-channelization enables several user devices to transmit at the same time over the sub-channel(s) allocated to them.

SOFDMA brings an additional advantages over OFDMA. Its scales the size to the Fast Fourier Transform(FFT) to the channel bandwidth in order to keep the carrier spacing constant across different channel bandwidths. Constant carrier spacing results in a higher spectrum efficiency in wide channels and a cost reduction in narrow channels .

Handoff mechanism in Mobile WiMAX

Soft handoff hard handoff Seamless

Who is Using WiMAX Today?

US SprintNextel:Q4 WDC,

Chicago Clearwire Vanu Alltel BellSouth (Fixed) AT&T/SBC (Nevada – fixed) 5GHz WISPs

Asia Korea: SKT Japan: KDD/NTT China: 3G allocations,

WiMAX allowance ,Huawei India: Tech-neutral spectrum

allocation (Tata – Aperto) Bangladesh:Bracnet, Agni

• Europe– UK: BT– Germany: ClearWire,

NextWave Broadcom.– France– Spain– Italy

• Latin America– Brazil: TVA (Samsung),

Telephonica, Telmar, Brasil Telecom

– Mexico: TelMex– Argentina: Entrach

Tech-neutral spectrum allocation

Summary

Fixed WiMAX Certified Equipment is getting to the marketWiMAX is REAL and being deployed worldwideWiMAX is rolling out in stages – To allow operators and vendors to make money as industry is growingMobile technologies are evolving to OFDMA, the foundation for 4G that is ideal for delivering cost-effective wireless data services (WiMAX is an early adaptor)

Thanks