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

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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 >

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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

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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

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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)

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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

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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

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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

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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)

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or i

ng

TCP/IP(IPv4)

P2P Platform

Current version (02/6)

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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)

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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

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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

Speed : 10 ～ 20 km/h

Max radio range : Around 100 m for WLAN card

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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

Speed : 60 ～ 80 km/h

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• 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

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- 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

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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