Http://WM.tongji.edu.cn Future Broadband Wireless Communication Mobility Testing Platform Ph.D,...

http://WM.tongji.edu.cn

Future Broadband Wireless Communication Mobility Testing

PlatformPh.D, Prof. Fuqiang Liu, Xuefeng Yin

Broadband Wireless Communication and Multimedia Institute

Embedded System and Computing-service Lab , Ministry of EducationSchool of Electronics and Information Engineering

Tongji Universityhttp://wm.tongji.edu.cn

http://WM.tongji.edu.cn

Tongji University’s CampusesTongji University’s Campuses

Siping Campus

Anting Campus

Anting auto

town;

Auto Electronics

Shanghai

第（ 3）页 http://WM.tongji.edu.cn

Outline• Broadband Wireless Testbed(WiMAX/4G)

– 4G Testbed Shanghai Platform

– Tongji’s work in 4G

– Vehicle Broadband Wireless Research and simulation

– Testing Platform

• Channel Emulation for Mobility Testing


临空经济园区建筑物分布图临空经济园区分布式组网小区规划图临空测量站址示意图

Testbed design(Shanghai)


OPNET simulation platform

Test method and suite design

GSM, WCDMA, TD-SCDMA, WIMAX, LTE

AM,FM,PM,ASK,FSK,PSK,QAM

System performance analyzer

Transportation Report

MeshRelayDistributed

Link level Simulation

Services Presentation

基于Multi carrier、MIMO、RoF等基本技术的分布式外场试验环境

Parameter & Environment Config

Network Deployment

Network performance report

Service Features Service flow model

Services Data Collection

Integrated service transportation performance Report

interface

DT DeviceAir Interface test

Multi-channel test

Wave Propagation test

Wireless QoS Test

Hybrid Services Concurrent Test

Outfield verification

system

G bit Transportation test

PXI Controller

Test Executive Manage Policy

Wireless Test Tools

Spectrum Test Tools

LabView

digitizer

Modulation tools

More test module

vector signal generatorchannel

simulatorspectrum analyzer

接口

Integrated test bed

应用层传输层

网络层

网络接口层

Framework of Shanghai 4GTest


• Base on the characters of the project, the indicators of the networking test should focus on the performance evaluation of the system.

Tongji’s work in 4Gtest


DEMO__MIMO based wireless network evaluation system demonstration


Networking Testbed Architecture

Channel Testbed


Features of DSRC• Dedicate short rang communications (DSRC) ,IEEE802.11p• 75 MHz of band available in U.S.

– Twice the bandwidth of cellular – Approved by FCC– Primary allocation– Allocation incentive was safety

• Range: Up to 1000 meters • Data Rate: Up to 27 Mbps

– Tolling will probably use default data rate of 6 Mbps

• Mobile connection: up to 120 mph• High Availability & Low Latency (50ms) Prioritization

Service


Service-Oriented Research

• Safety: improving driving safety and/or traffic efficiency • Non-safety: providing information and/or entertainment to the driver


Hybrid FrameworkVehicle Broadband Wireless Network Research (funded by National High-tech Research and Development Program (863 Project))

Transport Network

C2C Link

Mobile Relay AP

network infrastructure

Access

BUS

DSRC

CAR CARSS1SS3

SS2

Fixed AP, Local Control

Module

CAR

Internet

Intelligent Traffic Control

Center


Research Topics

• Realistic mobility model

• Multi-channel Coordination

• Mobility prediction

• Data dissemination

• Cluster-Based Routing Protocol Power

• Power Control

• Session Maintenance Maneuver


Realistic mobility modelTraffic flow characteristics

-Vehicles speed range -Lanes number

-Vehicles density -Lane changing features

-Traffic regulation


Multi-Channel Operation

North America FCC 1999 DSRC: 172-184, 7 channels

Channel Coordination Channel Assignment

Non SafetyApp.DATA

CCH Interval (50ms) SCH Interval (50ms)

CCH

SCH

UTC SecondSynchronization Interval (100ms)

WSA: WAVE Service Advertisement

Guard Interval

WSA

Backoff slots

AIFS SIFS

WSA

SafetyApp.

SafetyApp.

AIFSDIFS

WSA

Backoff slots

Guard Interval

RTS

CTS

Backoff slots

ACK

SIFS


Mobility Prediction

Mobility prediction

Nodes can rebuild new routes by sensing its neighbours' movements

unnecessary prediction (<200):

A->C1 、 C2 、 C3

safe transmission (200<R<240):

A->C4

change route (240<R<250):

A->D->Cn


Cluster-Based Routing Protocol

• Intra cluster : emergency messages, etc. • Inter cluster : non-emergency and long-distance messages, etc.


Simulation Scenario

AP

RSSS

V1

V2V3 flow1

flow2

flow3

flow3

flow4

flow4

DSRC Simulation in NS2


Testing Platform Scene

宽带无线通信与多媒体实验室

同济大学电子与信息工程学院大楼

①

②

③④

⑤

⑥

⑦

⑧

⑨

ⅡⅠ

①② 无线RSU

③ 交换机

④ 视频服务器

⑤⑥ CCD摄像头

⑦⑧⑨ 车辆 (配有车载终端)

Ⅰ RSU①覆盖区域

Ⅱ RSU②覆盖区域


DEMO__DSRC


Outline• Broadband Wireless Testbed(WiMAX/4G)

– 4G Testbed Shanghai Platform

– Tongji’s work in 4G

– Vehicle Broadband Wireless Research and simulation

– Testing Platform

• Channel Emulation for Mobility Testing

Http://WM.tongji.edu.cn Future Broadband Wireless Communication Mobility Testing Platform Ph.D,...

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