LTE Portfolio Webinar

LTE Portfolio Webinar

LTE Portfolio Webinar Outline

Copyright © IS-Wireless | www.is-wireless.com 2

1. LTE Intro

2. 4G Simulators

• LTE PHY Lab (Description and toolbox contents)

• LTE MAC Lab (Description and toolbox contents

3. LTE STACKS

4. 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 Network Network Architecture and Radio Interface Features


• 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

LTE Radio Interface Protocol Stack


Control Plane User Plane

L3 NAS

L3 RRC

L2 PDCP

L2 RLC

L2 MAC

PDCP

RLC

MAC

RRC

Application

PDCP

RLC

MAC

RLC

MAC

PHY L1 PHY PHY PHY

IP

PDCP

Radio Bearer

Management

Config of L2/L1

Ciphering

Integrity protection

Segment/Concat.

ARQ

Scheduling

HARQ

Multiplexing

Processing

Resource Mapping

Ciphering

Header Compression

Seq Number Maintain

The same

functions

as in Control

Plane

EPS Session Management:

Manage PDN

connections/QoS

EPS Mobility Management:

Security/mobility mngmt

Towards PGW

Towards

IMS/Internet

Uu

eNB

Uu

eNB

LT

E R

el.

8

LT

E R

el.

9

LT

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)

2009 2008 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 Freezing

December 2009

Specs Freezing

March 2011

Standardization

LTE Towards 4G Features’ Roadmap


4G Simulators

Reasons For System Modelling For Various Players in the Value Chain

LTE PHY Lab v.1.2 – a link level simulator

LTE PHY Lab E-UTRA Physical Layer Model

MAC Layer Multipath Channel

eNB PHY TX

UE PHY RX

MAC 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 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


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


LTE-Advanced in the LTE PHY Lab v.2

LTE PHY LabTM v.2.0 LTE-Advanced Features


Physical channels and signals

Downlink PRS, CSI-RS, UE RS

Uplink 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


LTE MAC Lab – a system level simulator


• Downlink and Uplink

• Multiple Mobiles

• Pathloss, shadowing and multipath

• RRM functionalities

LTE MAC Lab models radio network:

• scheduling

• interference

• mobility

• propagation

Main Features of the LTE MAC Lab:

channel

MAC

Packet Traffic

MAC

Packet Traffic

MAC

Packet Traffic

channel

LTE PHY Lab

eNB UE 1 … UE x

General Block Diagram of 4G System LabTM

Reflects Dynamic Radio System Behavior

LTE MAC Lab

L1: PHY L1: PHY L1: PHY

LTE MAC Lab System Level Simulator

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 STACKS – LTE L2/L3 Protocols Implementation

LTE STACKS Overview


The features of the LTE STACKS implementation include:

• Implementation in ANSI-C portable on various hardware platforms

• Multi-threading for support of parallelism of several entities

• Hardware Abstraction Layer (HAL) for independence on underlying hardware

platforms

• NAS / RRC interworking (e.g. state machines interworking, NAS message

encapsulation within proper RRC message)

• NAS / RRC procedures (e.g. taking proper actions upon receiving specific

message)

• Individual L2 protocol configuration by RRC

• RRC encoding / decoding with the use of ASN.1

• L2 processing algorithms (e.g. ciphering, segmentation)

• Individual L2 protocol procedures (e.g. data processing) and L2 interworking

procedures (e.g. MAC-RLC data exchange)

• PDU creation for each L2 protocol

• PHY layer parameters configuration (e.g. DCI setting)

• RRM functionalities (e.g. scheduler, link adaptation, handover, admission /

congestion control)

• Support for interworking with GSM and UMTS (e.g. NAS and RRC messages and

configuration)

LTE STACKS LTE UE and eNB STACK


LTE UE STACK is a complete implementation of UE L2 and L3 protocols according to 3GPP E-UTRA Rel. 10

LTE eNB STACK is a complete implementation of eNB L2 and L3 protocols according to 3GPP E-UTRA Release 10. It also consists of

Radio Resource Management (RRM) framework and supports handling of multiple UE as well as connectivity to other eNB entities and MME.

LTE STACKS Supporting Software: LTE TEST TOOL


• LTE Test Tool is a supporting application for analysis and high level testing of the LTE STACKS. • LTE Test Tool may be used for LTE protocol testing, verification of implementation and observation of signaling. • It is an application of protocol tester for visualization of both, the behavior and signaling of each protocol, as well as overall inter node (UE

and eNB) communications.

Technology

LTE Portfolio Webinar