Workshop on ‘LTE System Modelling Tool’ from IS-Wireless

LTE System Modelling Tools

LTE System Modelling Tools Outline

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• LTE Introduction

• 4G-online.net Introduction

• 4G-online.net Example Use Cases (www)

• LTE MAC Lab Introduction

• LTE MAC Lab Toolbox Content (Matlab)

• LTE PHY Lab Introduction

• LTE PHY Lab Toolbox Content (Matlab)

• Q&A

LTE Introduction

LTE Introduction 3GPP Systems’ Evolution


1997 2000 2005 2009 2011/2012

LTE LTE-Advanced

2G 3G 3.9G 3.5G 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

3GPP

Release

Voice only 14.4kbps UL: 128kbps

DL: 384kbps

UL: 11Mbps

DL: 28Mbps

UL: 75Mbps

DL: 325Mbps

UL: 500Mbps

DL: 1Gbps

Highest

Data Rate

LTE Introduction Goals / Requirements for LTE and SAE


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 Introduction LTE Details


• 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

S5 S1-U

S1-MME

X2

Internet /

IMS ...

LTE Network

4G-online.net

4G-online.net LTE and WiMAX Analisys Tool


• 4G-online.net is an advanced planning and analisys tool that can be used for:

• Coverage and capacity prediction

• RRM features evaluation

• Technology business casing

• Main Features:

• Standalone or Web-based

• Support for LTE and Mobile WiMAX

• All LTE and Mobile WiMAX channel bands and bandwidths

• Channel models for pathloss, shadowing, multipath

• Traffic and QoS models

• RRM functionalities: Scheduling, admission control, congestion control, link adaptation,

handover

• 2x2 MIMO schemes

• Frequency reuse schemes

• Configuration:

• MCS tables

• RRM functionalities parameters

• Environmental and propagation conditions

• Base station and terminal configuration

4G-online.net LTE and WiMAX Analisys Tool


• Downlink and Uplink

• Multiple Mobiles and BSs

• Support for LTE and WiMAX

• Pathloss, shadowing and multipath

• Traffic and QoS models

• RRM functionalities

• Frequency reuse schemes

4G-online.net models radio network:

• scheduling

• interference

• mobility

• propagation

Main Features of the 4G-online.net:

channel

MAC

Packet Traffic

MAC

Packet Traffic

MAC

Packet Traffic

channel

eNB UE 1 … UE x

General Block Diagram of 4G-online.net

Reflects Dynamic Radio System Behavior

4G-online.net

L1: PHY L1: PHY L1: PHY

4G-online.net General Algorithm Flow


Start

Generate channels

Generate UEs’ positions and mobility settings

t = 0

Admission control

Scheduling & Congestion control

PHY Layer abstraction and evaluation for all links

Update results and statistics

t = tend?

t = t+TTI

Stop

Update UE locations and propagation

conditions

Handovers

y

n

Traffic generation

LTE MAC Lab

LTE MAC Lab System Level Simulator


channel

MAC

Packet Traffic

MAC

Packet Traffic

MAC

Packet Traffic

channel

LTE PHY Lab

eNB UE 1 … UE x

General Block Diagram of LTE MAC Lab

Dynamic Radio System Behavior Model

LTE MAC Lab

L1: PHY L1: PHY L1: PHY

LTE MAC Lab General Algorithm Flow


Start

Generate channels

Generate UEs’ positions and mobility settings

t = 0

Scheduling & Link Adaptation

PHY Layer abstraction and evaluation for all links

Update results and statistics

t = tend?

t = t+TTI

Stop

Update UE locations and propagation

conditions

y

n

Traffic generation

LTE MAC Lab General Algorithm Flow


LTE MAC Lab Architecture LTE MAC Lab Main Algorithm

LTE PHY Lab

LTE PHY LabTM E-UTRA Physical Layer Model


MAC Layer Multipath Channel

eNB PHY TX

UE PHY RX

MAC Layer

Downlink

Uplink

General Block Diagram of LTE PHY LabTM

101010111001… 101010111001…

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

MAC Layer Multipath Channel

eNB PHY RX

UE PHY TX

MAC Layer

101010111001… 101010111001… UPLINK

DOWNLINK

eNB

LTE PHY Lab DL: eNB Transmitter Block Structure


Workshop on ‘LTE System Modelling Tool’ from IS-Wireless

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