SWAN: a Wireless Testbed for

IMT-Advanced Technologies

Yang Yang

Shanghai Research Center for Wireless Communications

Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences

SRIF 2012, INC, CUHK, Hong Kong, 12-13 Jan 2012

Outline

• 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

Research Team

• 60+ employees

• 40+ PG students

• Visiting researchers

• Adjunct professors

Employee StructureOthers 9%

Bachelor

23%

Master 40%

PhD 28%

PhD Master Bachelor Others

Research Areas

Physical Layer

• Cognitive Radio and Dynamic Spectrum Access

• Interface management technologies

Wireless Testbed

• Simulation platform

• Indoor testing platform

• Outdoor environment

• Application demo system

Patents and Standard Proposals

R&D

Collaboration

Network Layer

• Relay technologies

• Self-organized Networks

• Networks convergence

Current Research Projects

56 projects in the

last two years

Total: RMB 83M+

research funding

Research Outcomes (2004-2011)

160+ technical patents, 90+ standard proposals

6 books, 160+ 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

Advanced Wireless Testbed: A Must

OFDM

MIMO

Smart Antenna

Cognitive Radio

Link Adaptation

Wireless Relay

Network Coding

IPv6

…

New

Technologies

New

Standards

Users

Operators

Manufacturers

Standards

…

New

Requirements

Indoor/Outdoor

Open, Flexible

Expendable,

Professional,

Multiple bands,

…

Testing and

Evaluation

New

Systems

New

Business

Models

New

Services

Funding and Partners

• Funding: RMB 33M from MIIT, RMB 30M from

Shanghai local government

• 4 Industrial Partners

• China Telecom, Huawei, ZTE, Datang Mobile

• 7 Academic Partners

• Southeast University, Tsinghua University,

Beijing University of Posts and Telecom

(BUPT), Huazhong University of Science and

Technology (HUST), Xian Jiaotong University

(XJTU), University of Electronic Science and

Technology of China (UESTC), and University

of Science and Technology of China (USTC).

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.

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

Aim and Objectives

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

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/R10

uplink and

downlink channels

implementation

• Parallel computing

facility at Shanghai

Supercomputer

Center (25K cores)

• Multi-cell multi-

user scenarios

(system-level

simulation)

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 SUT Applic

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-1

• 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-2

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

• Software Defined Radio: programmable multi-mode, multi-band and/or multi-functional wireless devices

• Cognitive Radio: environment cognition, etc.

Battery Recovery Aware Sensor Networks

Cognitive Radio Hardware Platform-1

Battery Recovery Aware Sensor Networks

Cognitive Radio Hardware Platform-2

Battery Recovery Aware Sensor Networks

Cognitive Radio Hardware Platform-3

Environment cognition, upper layer stacks and SDRs are

implemented in the MCU (Nios® II processor).

General modules, such as FFT,

IFFT, MPSK, convolutional

encoder, Viterbi decoder and etc.,

are implemented in FPGA logics.

Wideband AD/DA boards

(150MSPS)

RF front end:

• IQ Modulator (TI: TRF3703-15)

• IQ Demodulator (TI: TRF3711-25)

• Frequency ranges from 700MHz

to 4GHz.

Case Studies and Demos

Parallel Computing Simulation

• Number of Subcarriers: 1024

• Number of Users: 4

• Length of CP: 144

• Modulation: QPSK

• Number of Cores: 64

Simulation Time:

115 hours 2.5 hours

System Level Simulation

• Coordinated Multi-Point (CoMP)

• Enhanced Inter-Cell Interference Coordination (eICIC)

• MU-MIMO technology

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

TX RX Channel 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-1

Algorithm Evaluation-2

• Based on MATLAB/C source files: Source file + C8 (Channel Emulator)+ Source file

4x4 MIMO-OFDM System

• PHY data rate: 1 Gbps

• 3 FPGA boards

• 4 AD/DA boards

• Baseband modules are hardware accelerated

• MAC and baseband mode selection are implemented in the NIOS core of the master board

Teminal

Base Station

Wirel

ess

Cha

nnel

Console

Gbps Wireless

Transmission

System

Control Stream

DownLink

Uplink

• A MIMO-OFDM Gbps wireless transmission system

• Iperf software for performance evaluation

• SmartBits 600B for traffic generation

Broadband Wireless Applications

WWW.SWAN.SH (coming soon)

• LTE Uplink: TX and RX

• WLAN 4x4: TX and RX

• RFID: TX and RX

Demos

• 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.

Professor 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