SWAN: an Open Wireless Testbed

for IMT-Advanced Technologies

Dr Yang Yang

Shanghai Research Center for Wireless Communications

SIMIT, Chinese Academy of Sciences

UC4G Shanghai Workshop, 12 September 2010

Outline

• About Shanghai Research Center for

Wireless Communications (WiCO)

• SWAN: Shanghai Wireless Advanced

Network

Software simulation platform

Indoor testing platform

Outdoor mobile environment

Application demonstration platform

• Case studies and demos

WiCO: Shanghai Research Center for Wireless Communications

MOST: International Center for Wireless

Collaborative Research

MOST: International Collaboration Base of Science &

Technology

STCSM: Research and Engineering Center for Broadband

Wireless Communication Technologies

CAS: Key Lab of Wireless Sensor Networks & Communications

Science and Technology Commission of Shanghai Municipality

Chinese Academy of Sciences (CAS), Shanghai

Institute of Micro-system and Information Technology

Changning District Government, Shanghai

Southeast University

Cell C

Cell ACell B

Cell ACell B

(a) (b)

(c)

Cell A

Cell B

Cell ACell B

(d)

Research Focuses and Expertise

• Cognitive radio and dynamic spectrum access

• Self-organized network (SON)

• Relay technologies

• Interference management

• Networks convergence

Research Outcomes (2004-2010)

140+ technical patents, 70+ standard proposals

6 books, 140+ research articles

IEEE Xplore Top 100 Downloads (03/2010)

• This ranking list covers all

R&D areas in Electronics

and Electrical Engineering

• 36. Carrier aggregation for LTE-advanced mobile communication systems

• 60. Self-configuration and self-optimization for LTE networks

• 97. Relay technologies for WiMax and LTE-advanced mobile systems

Standard Proposals on CR Technology

• Accepted by National ITU Standardization

Promotion Group

• Cognitive spectrum hole definition

• Cognitive Pilot Channel (CPC) definition and

function

• Centralized decision making

• Cognitive MAC spectrum sensing

• Cognitive directional transmission for vertical

coexistence

• The last four proposals have been accepted by ITU

(Geneva, 11-21 May 2010), ITU WP5A [LMS.CRS].

Standard Proposals on SON Technology

• Accepted by National IMT-Advanced/LTE-

Advanced Standardization Promotion Group

• Issue on PRACH load congestion

• Consideration of Cell type in MRO

• Distinguish the cause of RLF

• HO Configuration Negotiation

• Consideration on Unnecessary HO

• Issues on Mobility Change Request Procedure

• The Negotiation of Cell Reselection Parameters

in MLB

Standard Proposals on Relay Technology

• L1 Relay Backward Compatibility Analysis (3GPP TSG RAN)

• Downlink and Uplink Timing Synchronization for TDD Relays

(3GPP TSG RAN)

• Performance for Demodulate and Forward (DmF) Relays

• Analysis of Transmission Delay in Relay-enhanced Systems

• Distributed Link Adaptation for Relay-enhanced Systems

• On Link Adaptation for TDD Type II Relay-enhanced Systems

• Association of UE in Type II Relay-enhanced Systems

• Downlink Power Control for Mobile Relay

• Power Control for TDD Uplink

• Mode Management for Mobile Relays

• Downlink Flow Control for Un Interface

• Handover Optimization for Relay-enhanced Systems

• HARQ Timing for TDD Relays

International R&D Collaborations

WiCO-Nokia P1, 2004

WiCO-Ericsson, 2004

WiCO-Siemens, 2005

WiCO-CEA-LETI, 2005

WiCO-France Telecom, 2005

WiCO-Mobile VCE, 2005

WiCO-Prompt, 2006

WiCO-Nokia P2, 2007

WiCO-CSIRO, 2009

WiCO-Nokia P3, 2010

…

SWAN: Shanghai Wireless Advanced Network

International and National R&D Activities towards New-Generation Mobile Communication Networks

R&D of

3G and

future

mobile

systems

in China

ITU-R time schedule for

developing air-interface

technologies for IMT-A

2008 2009 20112010

R&D Air-Interface for IMT-A

Proposals

Technology Evaluation,

Result Analysis

Decision

Air-Interface

Standard

10/2010

02/2011

10/2009

New Generation Mobile

Wireless Broadband

Communication Networks

FuTURE

R&D of

Key

Technolog

y

System

Integration,

Demonstration

Pre-Commercial Trials and

Industrialization

2001 2003 2005 20102008

Standardization

2020

RDI of TD-SCDMA Systems

FuTURE +

Technical Requirements

• Wireless data rate: 1 Gbps (static) and 100 Mbps

(mobile)

• Spectrum efficiency: 5-10 bps/Hz (D-link), 2.5-7

bps/Hz (U-link)

• Frequency bands: 450-470MHz, 698-790MHz, 2.3-

2.4GHz, 3.4-3.6GHz

• Transmission bandwidth: 20/40/100 MHz

• MIMO support: 4x6MIMO

• Wireless channel models: Rice, Rayleigh,

Nakagami, GSM, DCS, IS-54, IS-95, 3GPP/3GPP2

SCM, SUI, WINNER, etc.

• Application protocols: HTTP, SSL, FTP, Telnet,

POP3, SMTP, RTSP, RTP, etc.

Aim and Objectives

To save your R&D time by 30%-50%

SWAN: Shanghai Wireless Advanced Network

Requirements

Analysis

Air interface

Technologies

Network

Technologies

System

Prototypes

Validation

and Demos

Software

Simulation

Integrated

Testing Platform

SWAN: A Testbed for IMT-Advanced Technologies

Services and

Applications

Ind

oo

r Testin

g

Pla

tform

Ou

tdo

or M

ob

ile

En

viro

nm

ent

ScramblingAfter FEC Enc Modulation DFT RE mapping SC-FDMATo analog

processing

After FEC Enc Scrambling Spreading Modulation

ZC

generation

PUSCH RS

PRACH

PUCCH RS

SRS

Bits from higher layer

图1 UL 传输链示图

After analog

processingAnt#1

Ant#2

Remove

CPFFT Deframing

RE

demapping

MIMO

equalization

TxD

equalization

After analog

processingRemove

CPFFT Deframing

RE

demapping

Channel

estimation

Layer

demmapingDemodulation Descrambling

Layer

demmapingDemodulation Descrambling

Layer

demmapingDemodulation Descrambling

Layer

demmapingDemodulation Descrambling

Layer

demmapingDemodulation Descrambling

PDSCH #1 To FEC Dec

PDSCH #2

PUSCH data

PUCCH dataBits from higher layer

PCFICH

PHICH

PDCCH

图2 DL 传输链示图

To FEC Dec

To FEC Dec

To FEC Dec

To FEC Dec

Software Simulation Platform

• 3GPP LTE R8

uplink and

downlink channels

implementation

• Parallel computing

facility at Shanghai

Supercomputer

Center (25K cores)

• Multi-cell multi-

user scenarios

(system-level

simulation)

System Level Simulation

• Coordinated Multi-Point (CoMP)

• Enhanced Inter-Cell Interference Coordination (eICIC)

• MU-MIMO technology

Indoor Testing Platform

• A VISA-based open, shared and flexible

testing environment

System

Under

Test

(SUT)

Software &

Hardware

Equipments

Control

& Demo

Platform

Indoor Testing Platform

Floor plan: ~300m2

20A1

A5 A6

D3

C1 C4C3C2 C5 D4

A9A7 A10A8

A1机柜：600X600X1100

可移动

B1 机柜：600X900X1800

可移动

C1 机柜：600X1200X2400

D1 工作台：1200X2400X800

立柱：800X800X2700

基带测试试验区射频和空口测试试验区

系统测试试验区

图展区 图展区室内试验区

系统演示区

D1 D2

B2B1A3

A4A2

业务测试和演示工作区被测设备总调试验区

电

视

幕

墙

系统演示测试控制台

用户体验区

玻璃移门 玻璃移门

RF SUTApplic

ations

Control

Users

Baseband Network Demo

Outdoor Mobile Environment

• Support multiple freq bands & transmission bandwidths

• Support urban, suburban, rural, and

highway communication scenarios

• Support both TDD and FDD systems

• Support relay and other technologies

• Support distributed radio networks

Phase

I

Phase

II

Application Demonstration Platform

• Broadband

multimedia traffic

from the Internet,

digital TV programs,

and telecom

networks

• High data-rate and

very bursty traffic to

demonstrate the

capabilities of IMT-

Advanced

technologies

室内演示

标清电视源

上海工程技术大学外场2

古北小区外场1

上海文广

FTP服务器流媒体服务器 Web服务器

IPV4

IPV6

高清电视源

上海电信武宁路ASON

CUC

上海交大

Internet

CERNET1CERNET2

3TNet

CU2CU1

上海宽带中心机房

室外演示

临空经济园外场3

CU3

上海临空经济园区机房

RAURAU

RAU

FTP服务器流媒体服务器 Web服务器

Application Demonstration Platform

千兆交换

演示笔记本

G比特业务承载演示---中心演示室

可视电话

可视电话

接入路由器

真实视频业务源（3TNet提供）

中心演示业务源

IPTV机顶盒

FTP 服务器

流媒体服务器

电视墙大屏幕演示系统

视频会议

视频会议

VOD

机顶盒

测试平台演示---中心演示室

综合业务传输

性能测试

外场环境小区

规划

宽带无线组网

性能测试

宽带无线传输

性能测试

演示视频流

数据流

移动场景---移动测试车

IPTV机顶盒

G比特传输

G比特G比特

WWW.SWAN.SH (coming soon)

Case Studies and Demos

Remote Cross-layer Testing

Internet /LAN

Remote User

Send Packets

Transmitter Receive Packets

Receiver

RF Monitering

RF Monitering

Wireless Router

Elektribit Propsim C8

NationalInstruments

PXIe-1065

SPIRENT Smartbits 600B

• Web-based remote

access and control

• Multiple radio

channel models

• Repeatable testing

• Cross-layer metrics

• L3: Throughput,

Delay, Packet-loss

• L1: Power spectrum

density, Symbol

Constellation

Remote Cross-layer Testing

TX RXChannel Emulator

EDA Simulation Platform

• Integrated hardware/software physical-layer testing and performance evaluation platform

Standardized Link-Level Development, Validation and Performance Evaluation

0 2 4 6 8 10 12 14 16 18 2010

-6

10-5

10-4

10-3

10-2

10-1

100

SNR(dB)

BE

R

AWGN PXI

EVA PXI

EVA Simulated

AWGN Simulated

• Frequency offset correction algorithms (UESTC)

• Cyclic delay diversity (CDD) in cyclostationary signatures (WiCO)

0

5

10

15

20

25

30

35-40

-30

-20

-10

0

10

2030

40

common

CP-induced

components

Am

plitu

de o

f CA

F

Lag p

aram

eter

Cycle frequency

distinguishable

CDD-induced

signature

Customized Algorithms Development, H/W Implementation and Evaluation

• Based on DLL files: TX.dll+C8 (Channel Emulator)+RX.dll

TX Side

RX Side

Algorithm Evaluation

Teminal

Base Station

Wirel

ess

Cha

nnel

Console

Gbps Wireless

Transmission

System

Control Stream

DownLink

Uplink

• A MIMO/OFDM-based Gbps wireless platform

• Iperf software for performance evaluation

• SmartBits 600B for traffic generation

Broadband Wireless Applications

• SWAN: an Open Wireless Testbed for the R&D of

IMT-Advanced Technologies

Conclusions

• SWAN: an Open Wireless Testbed for the R&D of

IMT-Advanced Technologies

Software simulation platform

Indoor testing platform

Outdoor mobile environment

Application demonstration platform

• WiCO is keen to promote international R&D

collaborations in future mobile communications

technologies, for knowledge creation,

technology transfer and standardization.

Dr. Yang Yang, Yang.Yang@shrcwc.org

Shanghai Research Center for Wireless Communications

Add: 6/F Information Building, 280 Linhong Road, Shanghai 200335, China

Tel: +86(21) 6128 0635

Fax: +86(21) 6128 0638

http://www.shrcwc.org