SWAN: an Open 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

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

• Green Wireless Communications

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

• 20+ 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 (2004-2010)

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

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 Open 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

Aim and Objectives

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

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

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)

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

• 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

WWW.SWAN.SH (coming soon)

Green Wireless Communications

Green Wireless Communications

• Energy efficient wireless network design and implementation

• Low-energy base stations: power amplifier, front-end filter

• Measuring and evaluation methodologies of carbon footprint

for ICT technologies

CN

IuB

IuB Uu

Uu

Iu

S1

X2

X2

X2

Link Performance Enhancement •Energy efficient TX/RX technologies •MIMO techniques

Infrastructure Evolution •Relay •femtocell •Cooperative communications •Networks convergence

Resources Management •QoS guarantee •Low energy consumption •Energy efficiency models

Self-Organized Network

•Dynamic energy management •Interference management

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

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

• Batteries are non-ideal energy reservoirs • Battery Recovery Effect

• We are motivated to exploit battery recovery to optimise energy efficiency.

Available Capacity

Potential Capacity

Battery Recovery is Possible, When Stop Discharging

Battery Recovery Aware Sensor Networks

Battery Aware Communication Protocols

• Distributed Random Duty Cycle

Based on pseudo-random sequence

• Battery Aware Duty Cycle

Forced to sleep when being active for a long period

Chi-Kin Chau Battery Recovery Aware Sensor Networks

• Harnessing Battery Recovery Effect in Sensor Networks, IEEE Journal on Selected Areas in Communications (JSAC), 2010.

Battery Aware Communication Protocols

Standard proposals on energy efficiency

metrics for base stations, ITU-T SG5/WP3,

Geneva, May 2011.

Standard Proposals on Energy Efficiency

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