Overview

EASY-C – Enablers for Ambient Services and Systems

Part C – Cellular Networks

Outline

2

Overview

Presentation

Next Generation Cellular Networks

Overview on the Project EASY-C

EASY-C Test Beds

Recent Achievements

Outline

Overview

Presentation

3

Next Generation Cellular Networks

Overview on the Project EASY-C

EASY-C Test Beds

Recent Achievements

Next Generation Cellular NetworksRequirements

Overview

Presentation

4

Click & Bang Click&WowLower Cost

per Bit

Low Latency FairnessHigh

Spectral Efficiency

Flexible

Spectrum

Usage

Streaming

Inexpensive Throughput

Anytime, Anywhere

Requirements as identified by the EASY-C consortium

Next Generation Cellular NetworksRequirements

Overview

Presentation

5

Source: http://www.ngmn.org

Requirements according to NGMN• Fairness

• Low Latency

• Spectral Efficiency

Next Generation Cellular NetworksFairness Aspect addressed in LTE Release 8 / WiMAX

Overview

Presentation

6

eNodeBeNodeB

Low SINR

Low data rate

LTE Rel. 8 / WiMAX do not sufficiently address fairness !!!

High SINR

High data rate

High SINR

High data rate

Next Generation Cellular NetworksSpectral Efficiency Aspect addressed in LTE Release 8 / WiMAX

Overview

Presentation

7

1st/2nd generation

• Bad spectral

efficiency through

high reuse factors

LTE Advanced

• Interference shaping

and exploitation

through distributed

MIMO and relaying

LTE Rel. 8

• Target of Reuse

Factor 1, interference

suppression through

classical MIMO

LTE Rel. 8 / WiMAX still strongly limited through interference !!!

Next Generation Cellular NetworksKey Technologies

Overview

Presentation

8

Technologies identified by LTE advanced task force

Technologies investigated in project EASY-C

Coordinated multi-point(CoMP)

Multi-antenna Techniques

Relay Functions

Inter-cell Interference Management

Self-optimizing Networks

Spectrum Aggregation

CoMP- driven by partners TUD, HHI, ALU, Qualcomm, Vodafone

Multi-antenna Techniques- driven by ALU, HHI, DTAG, Ericsson, Ubidyne, Vf

Inter-cell radio resource management- driven by ALU, DTAG

Relaying, Self-backhauling- driven by Ericsson, TUD

Self-optimizing Networks- driven by DTAG, Qualcomm

Spectrum Aggregation

Uplink Transmission

SchemeCoMP*

Downlink Transmission

Scheme

3GPP LTE-Advanced Key Technologies

RelayingEnhanced

MBMS

Next Generation Cellular NetworksKey Technologies

9

Overview

Presentation

Antennen -Konzepte & Deployment

EASY-C

CoMP = Coordinated Multi-point Transmission and Reception

MBMS = Multimedia Broadcast / Multicast Service

Next Generation Cellular NetworksCoordinated Multi-Point (CoMP) transmission

Centralized concepto Motivated from information theory

o Upper bound: interference-free cells

o Central unit (CU) is genius (CSI+data)

o Pre-computes all waveforms

o Sends them via remote radio heads

• High backhaul traffic (several Gbps)

• High latency requirements (few µs)

Distributed concepto Terminals feed back CSI to serving BS

o BS exchange data and CSI

• Less backhaul traffic (some 100 Mbps)

• Relaxed latency reqs. (some ms) o Each BS is now a genius

o Redundant computation of precoder

o Apply locally relevant weights

o Coherent signals superpose constructively and o interference destructively over the air

Overview

Presentation

10

Outline

Overview

Presentation

11

Next Generation Cellular Networks

Overview on the Project EASY-C

EASY-C Test Beds

Recent Achievements

Overview on the Project EASY-CKey Facts

Overview

Presentation

12

Project duration:

Budget:

Coordination:

Partners involved:

Main features:

April 2007 – September 2010

Approx. 47M€ , partially funded by the German Ministry for Education and Research (BMBF)

Prof. Dr.-Ing. Gerhard Fettweis

Vodafone Chair, TU Dresden

Network providers, system vendors, mobile terminal and chipset vendors, various start-ups and research entities

Covering concept research, field trial andterminal development in one project

Operating the largest research test beds forLTE advanced in the world

Overview on the Project EASY-CThe Project Consortium

Overview

Presentation

13

Rosenheim

Dresden

Nürnberg

Ulm

Stuttgart

Darmstadt

Paderborn

Bonn

Düsseldorf

Berlin

München

Aachen

Mainz

Overview on the Project EASY-CProject Structure

Overview

Presentation

14

2.1 Specification

1.1 Algorithm & Concept Exploration

1.2 Algorithm Classification & Selection

2.2 Implementation

2.3 Lab Test

2.4 Field Test

3.1 Specification

3.2 SoC Architecture

3.3 Implementation

3.4 Demonstrators

1.3 Assessment & Dissemination

WG 1

Algorithms & Concepts

WG 2

Technology Test Bed

WG 3

Hardware Architecture

Working Groups

Alcatel-Lucent

BNetzA

Dt. Telekom

Ericsson

FhG HHI

IFX/Comneon

Kathrein

Qualcomm

Actix

Signalion

TES

TU Dresden

Ubidyne

Uni Paderborn

Vodafone

Overview on the Project EASY-CResearch Approach

Overview

Presentation

15

Innovative Concepts & Algorithms

System & Link Level Simulations

Raytracing Models

TestbedsImplementation &

Performance Measurements

Channel Measurements

Hardware Architectures

Assessment

Standardization

1) Performance

Prediction

2) Channel Model

Coefficients

based on Field

Measurements3) Smarter

Simulation

Models

Trial Results

Selected Algorithms

•KEY POINTS:

•Algorithm Implementation

on real Hardware

•Performance Measurements

under realistic Conditions

Evaluation through Simulation and Field Test Measurements

Overview on the Project EASY-CResearch and Trial Concept

Overview

Presentation

16

SoA1

Evaluation of LTE

rel. 8 implementation

in UL/DL

without extensions

SoA2

Multi-user MIMO

within cells,

static int. coord.,

UL CoMP

SoA3

Multi-cell CoMP,

distributed radio,

resource management

„Next generation

evolution

approach“

„Next generation

exploration

approach“

SoA1

UL multi-cell CoMP

-Channel est.

- Synchronization

SoA2

UL/DL multi-cell CoMP

- Power control

- Improved schemes

SoA3

UL/DL multi-cell CoMP

- Relaying

- Improved Schemes

- Distributed RRM

Basis: Implementation close to LTE Release 8

Basis: Proprietary implementation with basic LTE Rel. 8 compatibility

Overview on the Project EASY-CFairness and Spectral Efficiency Targets

Overview

Presentation

17

*) all figures relative to LTE rel. 8

Average Cell-edge

UL

DL

+100%

+50%

+200%

+100%

System Perf. Requirements Rel. 8 LTE LTE-Advanced IMT-Advanced

Peak data rateDL 300 Mbps 1 Gbps

1 GbpsUL 75 Mbps 500 Mbps

Peak spectrum efficiency [bps/Hz]

DL 15 30 15

UL 3.75 15 6.75

Outline

Overview

Presentation

18

Next Generation Cellular Networks

Overview on the Project EASY-C

EASY-C Test Beds

Recent Achievements

EASY-C Test BedsDresden Test Bed Setup

Overview

Presentation

19

LTE-Advanced testbed with a total of 10 sites and 28 sectors

Hbf-

Süd

-

Hbf

Lenné-

platz

WTC

Mitte

Postplatz

Karstadt

Congress

Center

Fritz-

Förster-

Platz

Strass-

burger

Platz

T-Mobile site

Vodafone site

ICC’09 location

• Microwave links between sites

• Focus on physical layer; only

minimal MAC layer implemented

• Sites synchronized through GPS

and reference normals

• Rikscha concept for

prototype user equipment

• Testbed fully deployed

in April 2009

EASY-C Test BedsDresden Test Bed Infrastructure

Overview

Presentation

20

Each sector served by prototype eNB

Each site has a control computer

Control computers are connected via

Motorola Canopy backhaul

Each site has a GPS-based Meinberg

reference normal

for synchronization

The infrastructure is

connected to the

TUD intranet /

to the Internet

Hbf-Süd

Hbf

eNB

eNB

eNB eNB

eNB

eNB

eNB

GPS

Normal

GPS

Normal

GPS

Normal

EASY-C Test BedsDresden Test Bed Uplink Setup

Overview

Presentation

21

Uplink Features

Focus on PHY

Partial compatibility to LTE Rel. 8

Offline signal processingQuasi-

realtime scheduling possible

Control ComputerControl Computer

UEUE

eNBeNBeNB

UE

Trans-

mission in

PUSCH

Decode

PDCCH and

UL grant

Output of

CQI info

Sync

Send

PDCCH

DFT

(optional)

Sync

Dump

received

signals

Control Computer

Channel

Estimation

Config

data

Air interface

MATLAB

Signal ProcessingMATLAB

Signal ProcessingMATLAB

Signal Processing

GUI

File

Server

EASY-C Test BedsDresden Test Bed Equipment

Overview

Presentation

22

Radio Unit

Digital

Processing

Unit

Signalion Sorbas Platform

EASY-C Base Station Equipment EASY-C Mobile UEs

EASY-C UE and Basestation HW

Signalion‘s LTE Test UE Solution is used with

minor EASY-C specific modifications

EASY-C Basestation also implemented on

Signalion‘s modular Sorbas HW Platform with

limited functionality tailored to the project goals

Implementation of LTE advanced concepts on

BS side done jointly by project partners

EASY-C Test BedsDresden Lab Setup

Overview

Presentation

23

On the roof of the TUD, two sectors have been installed

Indoor or Outdoor

Terminals

Amateurfunk

Tower

BARKHAUSENBAU,

TU Dresden

IfN Tower

X-Pol Antenna from

KATHREIN and

Motorola Canopy Link

Mobile Lab Test

Terminal

LTE-Advanced testbed with a total of 4 sites and 7 sectors

EASY-C Test BedsBerlin Test Bed Setup

24

Overview

Presentation

Airlaser

Air

lase

r

optical

fiber network

1

2

3

4

• Laser links / fibre-optic

cables between sites

• Complete LTE Rel. 8

protocol stack / IMS sub-

system

• Focus on end-to-end

demonstrations

Highlights of LTE trial system

2.6 GHz, 20 MHz bandwidth

2x2 MIMO with MIMO mode switching

(MRC and MMSE)

Frequency-selective link adaptation

Timing advance, power control

Multi-user MIMO

Unicast and broadcast

CoMP

Panoramic view from T-Labs site

HHI

EASY-C Test BedsBerlin Test Bed Setup

25

Overview

Presentation

EASY-C Test Beds Test Scenario in Berlin

SiegmundsHof

HHI

TUBT-Labs

test area

Multi-cell scenario

Interference Rejection

Active Interference

Mgmt

CoMP / Network MIMO

Localization aware

Service Provisioning

Outline

Overview

Presentation

27

Next Generation Cellular Networks

Overview on the Project EASY-C

EASY-C Test Beds

Recent Achievements

Recent Achievements Selected Demonstrations in the Past

Overview

Presentation

28

February 2008

May 2008

June 2008

March 2009

Berlin

Dresden

Berlin

Berlin

• LTE rel. 8 downlink trial with

adaptive open/closed loop precoding

• Uplink multi-cell joint detection

demonstrated in laboratory

• Large-scale LTE rel. 8

measurement campaign with

throughput up to 150Mbit/s

• Uplink multi-cell joint detection

demonstrated live at a public

workshop in downtown Dresden

• IP-based mobile video conference

over MU-MIMO-enhanced LTE to a

test terminal in a car

December 2008 Dresden

June 2009 Dresden • 4 live demos over the air at ICC‘09

Recent Achievements Key CoMP Challenges Identified

Overview

Presentation

29

The consortium has gained vast experience in the implementation and

challenges connected to coordinated multi-point (CoMP):

System partitioningReducing Backhaul /

Infrastructure Aspects

Scheduling

Synchronization in

time / frequencyChannel estimation

&

Obtaining transmitter-

side CSI at eNBs

Impact of network MIMO

on higher protocol layers

Recent Achievements Public Visibility

Overview

Presentation

30

EASY-C is by now well-known in the mobile communications community

The public workshop collocated with an LSTI meeting in December 2008 was a

great success more than 120 participants from all over the world

Project partners have generated a vast number of publications connected to

EASY-C, including a Communications Magazine article which appeared in

February 2009

The International Conference on Communications (ICC‘09) in June 2009 in

Dresden with 1500+ participants has further increased the visibitily of EASY-C

50 m2 joint EASY-C booth

4 live demonstrators over the air

„International Workshop on LTE Evolution“ attracted ~80 participants

EASY-C has already left a major footprint in LTE-Advanced standardization

2 base stations, 2 terminals, measured multicell channel in between

Distributed CoMP demo by Heinrich-Hertz-Institute and Deutsche Telekom

Recent AchievementsDemo Setup at ICC 2009, Dresden, Germany

Overview

Presentation

31

Recent AchievementsPublic Visibility – Impressions from the ICC‘09

Overview

Presentation

32

Recent AchievementsCoMP Live Demo at ITU Meeting in Dresden

Demonstration of novel Downlink CoMP Transm. from 2 eNBs to

2 Ues schemes at ITU-R SG5 WP5D Meeting

Decentralized eNB Cooperation

Strong level of interference cancellation

Strong spectral efficiency improvements

Overview

Presentation

33

C ChainC ChainC Chain

C ChainC ChainUE

Control ComputerControl Computer

eNBeNBeNB

Coarse

Sync

Dump

received

signals

CSI Trans-

mission

in PUSCH

Sync

Decoding of

CSI in

PUSCH

Real-time

linear

precoding

Enhanced

channel

estimation

Control Computer

Config

data

Debug

information

Air interface

Real-time

modulation

and coding

CSI

Feedback

generation

Fine sync

Channel

estimation

LTE Rel.8

emulation

GUIDecoding

ChainEqualization

Recent Achievements First Multiuser-MIMO Field Trial in Berlin 2008

Single-user throughput with 2° down-tilt

Main result: Multi-stream becomes dominant with MU-MIMO

AmateurfunkTowerBS 2

BARKHAUSENBAU,TU Dresden

IfN TowerBS 1

18.1

7.9

13.316.1

16.3

13

• Maximum Sum Throughput

Conventional [Mbps]

CoMP [Mbps]

Recent AchievementsUplink CoMP Measurement Results by TU Dresden in 2009

Overview Presentation

35

Joint detection of both terminals by a

central compute node

Recent Achievements DL Throughput SU MIMO without IF in Dresden Testbed

Distance (rel Units)

Nürnberger PlatzHBF

Drive Test Route:

Downlink Throughput SU MIMO:

Band 7 (2.6 GHz)

Bandwidth: 10 MHz

eNB-Prototype

Test Mobile

Peak Data Rate (avg): 50.8 Mbps

Peak Data Rate (spike): 69 Mbps

(64QAM CR 0.9 ;TFRC70)

Overview

Presentation

36

ALU eNodeB

Thank you!

Please mark your calender and

visit our next Public Workshop in Dresden on 16th April 2010