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Modul-1

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CONTENTS

Modul-1 Introduction & Background

Modul-2 LTE Physical layer

Modul-3 LTE Network & Protocol

Architecture

Modul-4 Practical Deployment Aspects

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CONTENTS

Modul-1

Cellular wireless system evolution

Service evolution & user expectations

Global mobile broadband growth

Comparison b/w LTE and other technologies

What is LTE ?

Requirements of LTE

Key features of LTE

LTE Spectrums

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Where is the mobile industry going ?

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International Mobile Telecommunications (IMT)-2000 introduced global

standard for 3G.

Systems beyond IMT-2000 (IMT-Advanced) is set to introduce

evolutionary path beyond 3G.

Mobile class targets 100 Mbps with high mobility and nomadic/local area class

targets 1 Gbps with low mobility.

3GPPand 3GPP2are currently developing evolutionary/revolutionary

systems beyond 3G.

3GPP Long Term Evolution (LTE)

3GPP2 Ultra Mobile Broadband (UMB)

IEEE 802.16based WiMAX is also evolving towards 4G through

802.16m

Beyond 3G

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Release 99/Rel-4 (Mar.2002) : UMTS/WCDMA

Rel-5 (Mar.2002) : HSDPA

Rel-6 (Mar.2005) : HSUPA

Rel-7 (2007) : DL MIMO, IMS, optimized real-time services (VoIP,

gaming, push-to-talk)Long Term Evolution (LTE)

3GPP work on the Evolution of the 3G Mobile System started in

Nov2004.

Standardized in the form of Rel-8.

Spec finalized and approved in January 2008.

Target deployment in 2010.

LTE-Advanced study phase in progress.

3GPP Evolution

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3GPP Roadmap

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CDMA2000-1X (1999)

CDMA2000-1X EV-DO(2000)

EV-DO Rev. A(2004) : VoIP

EV-DO Rev. B(2006) :Multi-carrier

Ultra Mobile Broadband (UMB),f.k.a. EV-DO Rev. C:

Based on EV-DO, IEEE 802.20 and FLASH-OFDM

Spec finalized in April 2007.

Commercially available in early 2009.

3GPP2 Evolution

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3G CDMA Evolution

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IEEE 802.16 Evolution

802.16e-2005(End 2005)

OFDM+OFDMA

802.16(2001)

802.16a(2003)

802.16-2004(June 2004)

OFDM

802.16eOFDMA

Fixed Wireless BroadbandAir Interface : 1066 GHz

802.16 Amendment

Fixed Wireless Broadband

MAC & PHY : 211 GHz

NLOS based upon OFDM

802.16 Revision PAR for 802.16,

802.16a

Fixed Wireless Broadband System

Profiles, Errata for 2 11 GHz

(Formerly802.16 REVd)

Changes to 802.16e ratified that

allowed for a unified profile

completed and mobility support

802.16 Amendment for Combined

Fixed and Mobile wireless

broadband at vehicular speeds in

Licensed bands from 2 6 GHz

Waiting for corrigendum

WiMAX Forum Interoperabi l i ty

Prof i les

WiMAX Cert i f icat ion

Koreadeveloping aparallel effort

WiBro

July 04

Korea GovtDecision ConvergenceWiBro w 802.16e

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Service Evolution & User Expectations

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User Expectations

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Global Mobile Broadband Subscription Forecast 2013

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Mobile Broadband Subscriber Forecast, Sources : GSM Association, Analysis Mason

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Need for Network Evolution

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Future Services Empowered by LTE

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Experience Comparison

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Comparison b/w HSPA+ and LTE System Architecture

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Peak Rates for Downlink & Uplink Over Time

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Latency of Different Technologies

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What is LTE ?

The next step in the evolution of 3GPP

radio interfaces to deliver

Global Mobile Broadband

A plan first conceived in 2004

Standardization based on clearlydefined performance targets

Standardization based on clearly

defined economic targets

Standardization based on improved

use of radio spectrum

Standardization based on simplified

system design

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LTE General

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Requirements of LTE (1/4)

Downlink

Uplink

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Requirements of LTE (2/4)

Latency

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Requirements of LTE (3/4)

Bandwidth

Scalable bandwidth of 1.25, 2.5, 5, 10, 15, 20 MHzshall be supported.

Interworking

Interworking with existing UTRAN/GERAN systems and non-3GPP system

shall be ensured.

Interruption time for handover between E-UTRAN and UTRAN/GERAN shall

be less than 300 msfor RT services, and less than 500 msfor NRT services.

Multimedia Broadcast Multicast Services (MBMS)

MBMS shall be further enhanced and is then reffered to as E-MBMS.

Cost

Reduced CAPEX and OPEX including backhaul shall be achieved.

Cost effective migration from release 6 UTRA radio interface and architecture

shall be possible

All the interfaces specified shall be open for multi-vendor equipment

interoperability.

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Requirements of LTE (4/4)

Mobility

Optimized for low mobile speed (0 ~ 15 km/h)

Higher mobile speeds shall be supported (incl. high speed train)

Spectrum allocation

Operation in paired FDDdan unpaired spectrum TDDis possible.

Co-existence

Co-existence in the same geographical area and co-location with

GERAN/UTRAN shall be ensured.

Quality of Service

End-to-end QoS shall be supported.

Network synchronization

Time synchronization of different network sites shall not be mandated.

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LTE Enabling Technologies

OFDM (Orthogonal Frequency Division Multiplexing)

Frequency domain equalization

SC-FDMA (Single Carrier FDMA)

MIMO (Multi-Input Multi-Output)

Multicarrier channel-dependent resource

scheduling

Fractional frequency reuse

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LTE Standard Specifications

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Spectrum Flexibility

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Current 3GPP bands early LTE

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Global LTE Commitments