LTE Simulators

LTE SimulatorsOutline

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1. LTE Introduction

2. LTE PHY Lab Introduction

3. LTE-A Features in LTE PHY Lab

4. LTE PHY Lab Toolbox Content (Matlab)

5. Q&A

LTE Introduction

LTE Introduction3GPP Systems’ Evolution

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1997 2000 2005 2009 2011/2012

LTE LTE-Advanced

2G 3G 3.9G3.5G 4G

1992

GPRS

2.5G

GSM UMTS HSPA

Phase 1

Phase 2

Rel. 96

Rel. 97

Rel. 98

Rel. 99

Rel. 4

Rel. 5

Rel. 6

Rel. 7

Rel. 8

Rel. 9

Rel. 10

Rel. 11

3GPPRelease

Voice only 14.4kbpsUL: 128kbps

DL: 384kbps

UL: 11Mbps

DL: 28Mbps

UL: 75Mbps

DL: 325Mbps

UL: 500Mbps

DL: 1Gbps

HighestData Rate

LTE IntroductionGoals / Requirements for LTE and SAE

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eNB

eNB

Standardization work for LTE and SAE started in December 2004

IMS/Services/Internet/PSTN

WiMAX

EPC

GERAN/UTRAN

cdma200

Fixed

High data rate/low latency/packet optimized RAN All IP based/flat core network architecture

LTE Goals/Requirements

• High speed (up to 350km/h)

• Low latency (below 10ms)

• Large throughputs (DL 100Mbps, UL 50Mbps)

• VoIP Capacity (200 users in 5MHz BW)

• Lower bit cost

• Flexible and scalable BW and spectrum

• Flat RAN network (only eNBs)

SAE Goals/Requirements

• Access for all NWs (interworking/global roaming)

• IMS for all NWs

• Easy migration to EPS (from 2G/3G networks)

• Flat IP network (‘always-on’ concept)

• QoS Support for all services

• Policy and charging

aGW

LTE NetworkNetwork Architecture and Radio Interface Features

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• Multicarrier Transmission: DL OFDMA, UL SC-FDMA

• Shared data channels with fast update (1ms) and multi-

layer retransmissions

• Adaptive Modulation and Coding

• Multi Antenna Transmission: DL MIMO (2 or 4 antennas)

• Scalable System BW: 1.4, 3, 5, 10, 15, 20 MHz

• Quality-of-Service on Radio Interface

Radio Interface Technologies

eNB

LTE Radio Interface

SGW

MME

eNB

eNB

PGW

HSS

Uu

Uu

S11

S6a

S5S1-U

S1-MME

X2

Internet /

IMS ...

LTE Network

LT

E R

el.

8LT

E R

el.

9LT

E R

el.

10

MIMO

TF Scheduling

OFDMA/SCFDMA

HARQ

Reduced architecture

Adaptive-MCS

MBMS based on SFN

SON

Carrier Agregation (wider BW)

Relaying

Extended DL MIMO (8x8)

20092008 2010 2011 2012

Commercial deployment

Location Services

UL MIMO (4x4)

Enhanced Home eNB & HetNet

LT

E R

el.

11 Coordinated Multipoint Tx/Rx

MTC (M2M Communications)

eICIC and Relays

Specs freezing target

december 2012

LTE-Advanced

Specs Freezing

December 2008

Specs FreezingDecember 2009

Specs FreezingMarch 2011

Standardization

LTE Towards 4GFeatures’ Roadmap

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4G Simulators

Reasons For System ModellingFor Various Players in the Value Chain

LTE PHY Lab – a link level simulator

LTE PHY LabE-UTRA Physical Layer Model

MAC LayerMultipath

Channel

eNB

PHY TX

UE

PHY RXMAC Layer

Downlink

Uplink

• Implemented according to 3GPP Specifications

• Downlink & Uplink

• Single TX - single RX

• FDD and TDD versions

• Evaluates each individual bit

• All LTE MIMO Schemes

• Support for all LTE BWs

Main features of the LTE PHY Lab:

General Block Diagram of LTE PHY LabGeneral Block Diagram of LTE PHY Lab

LTE PHY Lab can be used to model

link-level behavior of LTE system:

• fading & AWGN

• FEC performance

• modulation

• synchronization & channel estimation

• performance measures: thrpt vs SNIR

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101010111001… 101010111001…

Comprehensive implementation of the 3GPP Rel 8 E-UTRA PHYComprehensive implementation of the 3GPP Rel 8 E-UTRA PHY

MAC LayerMultipath

Channel

eNB

PHY RX

UE

PHY TXMAC Layer

101010111001… 101010111001…UPLINK

DOWNLINK

eNB

LTE PHY Lab DL: eNB Transmitter Block Structure

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LTE-Advancedin the LTE PHY Lab v.2

LTE PHY LabTM v.2.0LTE-Advanced Features

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Physical channels and signals

Downlink PRS, CSI-RS, UE RSUplink PUCCH format 3

• Downlink• Extended SU-MIMO (up to 8 antennas)

• Support for Carrier Aggregation with up to 5 Component Carriers

• Release 9 PRS

• Release 10 UE Specific RS

• Release 10 CSI RS

• Uplink• Uplink SU-MIMO for PUSCH (up to 4 antennas)

• Uplink Spatial Diversity (SORTD) for PUCCH

• Support for Carrier Aggregation with up to 5 Component Carriers

• Clustered SC-FDMA

• New PUCCH format 3 for Aggregated HARQ-ACK Transmission for CA Support

• Possibility for simoultaneous transmission for PUCCH and PUSCH

eNB

eNB

LTE PHY Lab v.2.0 DL: eNB Transmitter

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LTE PHY Lab Toolbox

Q&A