DeekshaTech

www.deekshatech.in

DEEKSHA TECH GROUP

Module 1

LTE architecture & basics Overview

Agenda

History of Cellular systemLTE RequirementsLTE Basic ArchitectureMultiple Access approachesPhysical LayerBusiness CaseNew Services

history of cellular technologies

LTE is the Global standard for Next Generation – FDD and TDD

CDMA Track (3GPP2)

GSM Track (3GPP)

2001 2005 2008 2010

LTEFDD and TDD

GSM WCDMA HSPA

TD-SCDMA

CDMA One EVDO Rev A

Mobile System Evolution

LTE - FDD- TDD

LTE – Targets› High data rates

– Downlink: >100 Mbps– Uplink: >50 Mbps– Cell-edge data rates 2-3 x HSPA Rel. 6 (@ 2006)

› Low delay/latency – User plane RTT: < 10 ms RAN RTT (fewer nodes, shorter TTI)– Channel set-up: < 100 ms idle-to-active (fewer nodes, shorter messages, quicker node resp.)

› High spectral efficiency – Targeting 3 X HSPA Rel. 6 (@ 2006 )

› Spectrum flexibility– Operation in a wide-range of spectrum allocations, new and existing– Wide range of Bandwidth: 1.4, 3, 5, 10, 15 and 20 MHz, FDD and TDD

› Simplicity – Less signaling, Auto Configuration e-NodeB– ”PnP”, ”Simple as an apple”

› Cost-effective migration from current/future 3G systems

› State-of-the-art towards 4G

› Focus on services from the packet-switched domain

SIMPLIFIED Network architecture

Mapping of 2/3G nodes to 4G

EPC AND E-UTRAN NODES AND INTERFACES

Multiple Access approaches

LTE Physical Layer

• Flexible bandwidth– Possible to deploy in 6 different bandwidths

up to 20 MHz

› Uplink: SC-FDMA with dynamic bandwidth (Pre-coded OFDM)– Low PAPR Higher power efficiency– Reduced uplink interference (enables intra-cell

orthogonality )

› Downlink: Adaptive OFDM and OFDMA– Channel-dependent scheduling and link adaptation

in time and frequency domain

› Multi-Antennas, both RBS and terminal– MIMO, antenna beams, TX- and RX diversity, interference rejection– High bit rates and high capacity TX RX

time

frequency

time

frequency

› Harmonized FDD and TDD concept– Maximum commonality between FDD and TDD

› Minimum UE capability: BW = 20 MHz

10 15 20 MHz3

fDL

fUL

FDD-onlyfDL

fUL

Half-duplex FDDfDL/UL

TDD-only

Δf=15kHz

1 ms

180 kHz

User #2 scheduledUser #1 scheduled

User #3 scheduled

1.4 5

Each segment of the ecosystem has a role to play in LTE’s success

• Demonstrated • Innovative • Focused efforts to • New, innovativepotential through 4G applications that understand & GUI designs to takelab tests and trials take advantage of address end-user advantage of rich

• Possibly, multi- LTE’s bandwidth and requirements multimedia contentlatency among consumers and applicationsstandard basecharacteristics and businessesstations to facilitate • Development of new

migration from and • Rich multimedia • Willingness to take device categoriestransitional content to drive measured risks to (MIDs) to leveragecoexistence of 3G to eyeballs to the monetize 4G LTE beyond the4G handset screen handset

•Dual-mode chips to enable seamless 3G/4G coexistence

•Greater computational power on board

•Improved battery life for media-intensive applications

ComponentNetwork Content & Content &

DeviceInfrastructure Applications Application

Vendors ProvidersProviders Developers Distributors

Vendor details

LTE MARKETING : LTE SERVICES ARE BEING POSITIONED TO TARGET CONSUMER AND BUSINESS SEGMENT

VEDIO INCLUDING STREAMING AND DOWNLOADS, WILL DRIVE THE GRESTEST VOLUME OF TRAFFIC

“Thank you”