all rights reserved, copyright, 2002, hitachi europe sas ad hoc networks: applications and merits...

All Rights Reserved, Copyright, 2002, Hitachi Europe SAS

Ad Hoc Networks:Applications and Merits

Dr. Stéphane AmargerMasato HayashiHitachi Europe

Sophia-Antipolis Laboratory

Workshop on Broadband Wireless Ad-Hoc Networks and Services, 12th - 13th September 2002, ETSI, Sophia Antipolis, France


Public Area

- Autonomous networking on the spot for temporary purpose without any help of operator network (Instant Network)

- All terminals can be mobile (dynamic Network) - Anywhere, Anytime , Anybody,Anything ,,, (Ubiquity)

After gathering

Connection

Service

Finish

Good-bye

E.g.- Meeting - Game- Walky-talky- Mail etc.

Freedom of Networking

Ad hoc Network System

< Process >


Ad hoc Communication Technologies

Network layerNetwork layer• Multihop• Dynamic Routing

Network layerNetwork layer• Multihop• Dynamic Routing

Group Group ManagementManagement

• Security• Presence

Group Group ManagementManagement

• Security• Presence

ApplicationApplication• ITS• P2P • Home network etc.

ApplicationApplication• ITS• P2P • Home network etc.

IP Routing

Group communication

Ad hoc service

Three Layers


Network layer

◆Independent of Operator Network Direct connection among Devices◆Multihopping Data relay over intermediate devices ◆Dynamic routing Autonomous new route discovery

a ce

h

bd

f

gMoving

Multihop

New route


Standardizations

• The Mobile Ad-hoc Networking (manet) : a chartered working group within the IETF– Unicast protocol

• Ad Hoc On Demand Distance Vector (AODV) routing

• Optimized Link State Routing Protocol (OLSR)

– Multicast protocol• Multicast Ad hoc On-Demand Distance Vector (MAODV) routing

• Differential destination Multicast (DDM)

• On-Demand Multicast Routing Protocol (ODMRP)


Standardization of Ad hoc Routing

[Ad hoc network]

宛先 Next Hopb b

c cd be bf b

ab

c

d

e

f

Method OLSRTBRPF DDRCompany INRIASRI Eurecom/

Hitachi

Subnet

subnet

NW structure

subnetflatMaintena

nce of route

Exchange in need （ and cached ）

Exchange informati

on

Only Neighbor information

Full Topology information

Topology

changeRefresh in

needPeriodical refresh

Refresh of subnet in need

Scalability

○△ ◎Routing overhea

d

Constant ：○ Small changes ： ◎

Many changes ： △

Constant ：○

○ ○△

• Hitachi and Eurecom developed DDR for a large scalability, and now considering about joint researches with INRIA (OLSR)

TBRPF: Topology Broadcast Based on Reverse-Path ForwardingOLSR : Optimized Link State RoutingDDR : Distributed Dynamic Routing

subnet

Periodical exchange of

route information

Periodical exchange of

route information

Robustness to route change


Group Management

Application group control

File transfer

Manager of group

Session1

Session2

Service Advertisement / Discovery

Group Control

Session1 Session2

Group Termination

Process flow

Service Termination

Group Management : Tracking of group members Session Management : Application connection control

Session


Ad hoc demonstration System

Wireless Technology : WLAN (IEEE802.11b)

① Ad Hoc Network routing （ DDR) － Topology Monitor　　－ Multi-hopping　　－ Dynamic Routing

②Application examples　　－ Security Monitoring System　　－ Mobile P2P(file sharing,chat)

Scenario

Demonstration room

VideoServer

GW

Monitor

Fig. 　 Demonstration System

- Network Topology- Video Monitor

Camera 1

Camera 2

Multi-hopping

WLAN

Dynamic Routing Change of GW

GW

PC7

PC6


To

po

log

y

mo

nit

or i

ng

To

po

log

y

mo

nit

or i

ng

QoS

Software architecture and Development

WinCE.NET/WindowsXP/Linux

OLSR/DDR

White Board

• Implementation for Ad hoc Routing （ OLSR 、 DDR ）– Linux version (current version)– WinCE.NET/WindowsXP version (future version)

• Group management and security (this autumn)• P2P Platform

– Implementation of JXTA on Linux (current version)– WinCE.NET/WindowsXP version (under working) – Implementation of GLUE/GAIA by TME(under working)

• Installation of multipoint-to-multipoint type IM/VoIP/WhiteBoard (P2P type application) (under development)

Group management, Security

P2P Platform

Wireless LAN （ 802.11b ）Wireless LAN （ 802.11b ）

TCP/IP(IPv4/v6)

IMVoIPVideo Chat

Linux

OLSR/DDR

File sharing

Video Chat

Wireless LAN （ 802.11b ）Wireless LAN （ 802.11b ）

Future version (03/4)

To

po

log

y

mo

nit

or i

ng

To

po

log

y

mo

nit

or i

ng

TCP/IP(IPv4)

P2P Platform

Current version (02/6)


Application example (1) ： Network for a construction site

a construction siteTemporary Office on

site

Ad hoc Network•Constructing a network easily (temporally)•Deploying sensors and cameras flexibly to monitor

NetPDA•Lightweight, small device•IM/VoIP/Vide real time communication

• Construction network under proceeding development everyday

• Establishment of communications between a construction site and its office in a real time (Text, Voice and image)


Application example （ 2 ）： Network between vehicles - ITS

• Constructing a network between vehicles or between access post and vehicles• Collection of probe information （ speed 、 ABS 、 wipers, etc ） , delivering various

information

Car Internet center

Internet


Experiment at HSAL (1) : Ad hoc Networking between Vehicles

Application : Video Image Transmission

Case I :Transmission from Moving car to Stationary car Camera

Stationary Receiver

Case II :Transmission from Stationary car to Moving car

SenderStationary

Moving Sender

Camera

Moving Receiver

Speed : 10 ～ 20 km/h


Max radio range : Around 100 m for WLAN card


Experiment at HSAL (2) : Ad hoc Networking between Vehicles

Case III : Multihopping between stationary cars

Stationary cars

Receiver Video SenderRelay

Case IV : Transmission between Moving cars

Video Sender

About 30 m About 60 m

About 20 ～ 40 m

Receiver



• Monitor system for security company• Networking among staffs on patrol

Application

Application

AdvantagesAdvantages

• Instant networking in need on the scene - Covering radio shadow of operator’s network - Easy deployment of monitor cameras

Embedded Camera

Ad hoc Relay

Application example （ 3 ）： Security System, Emergency System


- Easy covering all home area- Easy installation of Home security

System(Monitor)- Cost cut by ad hoc networking (relay)

between access point and home appliances

ADSLCATVFTTH

Advantages

Advantages

Application example （ 4 ）： Home Networking

multihopping


Ad hoc Network between BSs

Servers for Intranet

DMZ

GW

FWRadius IM/

MailWeb

・・・

IEEE802.1xauthenticatio

n

• Easy installation of WLAN network system with use of ad hoc networking betweens base station (BS)s of WLAN

• Instant P2P communication on business site

Instant Network

by Ad hoc

IM/VoIP

Internet

Public WLAN area

3G

IM/VoIP

Application example （ 5 ）： Office Networking

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