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Ad Hoc Networks: Applications and Merits. Dr. Stéphane Amarger Masato Hayashi Hitachi Europe Sophia-Antipolis Laboratory. Workshop on Broadband Wireless Ad-Hoc Networks and Services, 12th - 13th September 2002, ETSI, Sophia Antipolis, France. Ad hoc Network System.

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slide1

Ad Hoc Networks:

Applications and Merits

Dr. Stéphane Amarger

Masato Hayashi

Hitachi Europe

Sophia-Antipolis Laboratory

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

slide2

Ad hoc Network System

- 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)

< Process >

After gathering

Connection

Service

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

Finish

Public Area

Freedom of Networking

Good-bye

slide3

Ad hoc Communication Technologies

Three Layers

  • Application
  • ITS
  • P2P
  • Home network etc.

Ad hoc service

  • Group Management
  • Security
  • Presence

Group communication

  • Network layer
  • Multihop
  • Dynamic Routing

IP Routing

slide4

Network layer

◆Independent of Operator Network

Direct connection among Devices

◆Multihopping

Data relay over intermediate devices

◆Dynamic routing

Autonomous new route discovery

f

New route

d

b

h

e

Multihop

a

c

Moving

g

slide5

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)
slide6

宛先

Next Hop

b

b

c

c

d

b

e

b

f

b

Standardization of Ad hoc Routing

Method

TBRPF

OLSR

DDR

[Ad hoc network]

Company

SRI

INRIA

Eurecom/Hitachi

NW structure

flat

subnet

subnet

b

d

f

a

Maintenance of route

Periodical exchange of route information

Exchange in need

(and cached)

Periodical exchange of route information

c

e

Full Topology information

Only Neighbor information

Exchange information

Subnet

subnet

Topology change

Refresh of subnet

in need

Refresh in need

Periodical refresh

Scalability

Small changes : ◎

Many changes : △

Routing overhead

Constant:○

Constant:○

Robustness to

route change

  • 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 Forwarding

OLSR : Optimized Link State Routing

DDR : Distributed Dynamic Routing

slide7

Group Management

Group Management : Tracking of group members

Session Management : Application connection control

Application group control

Process flow

Manager of group

Service Advertisement / Discovery

Group Control

Session2

File transfer

Session1

Session1

Session2

Group Termination

Service Termination

Session

slide8

WLAN

Ad hoc demonstration System

Scenario

① Ad Hoc Network routing (DDR)

- Topology Monitor

  - Multi-hopping

  - Dynamic Routing

②Application examples

  - Security Monitoring System

  - Mobile P2P(file sharing,chat)

- Network Topology

- Video Monitor

Dynamic Routing

Change of GW

Camera 1

PC6

GW

Multi-hopping

Monitor

Video

Server

GW

Camera 2

PC7

Demonstration room

Fig.Demonstration System

Wireless Technology : WLAN (IEEE802.11b)

slide9

Software architecture and Development

VoIP

Video

Chat

IM

White

Board

Video

Chat

File sharing

Topology

monitoring

Topology

monitoring

P2P Platform

P2P Platform

Group management, Security

TCP/IP(IPv4)

OLSR/DDR

TCP/IP(IPv4/v6)

OLSR/DDR

QoS

Linux

WinCE.NET/WindowsXP/Linux

Wireless LAN(802.11b)

Wireless LAN(802.11b)

Current version (02/6)

Future version (03/4)

  • 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)
slide10

Application example (1):

Network for a construction site

  • Construction network under proceeding development everyday
  • Establishment of communications between a construction site and its office in a real time (Text, Voice and image)
  • 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

a construction site

Temporary Office on site

slide11

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

Internet

Car Internet center

slide12

Experiment at HSAL (1) :

Ad hoc Networking between Vehicles

Application : Video Image Transmission

Case I :Transmission from Moving car to Stationary car

Camera

Speed : 10 ~20 km/h

Moving Sender

Stationary Receiver

Case II :Transmission from Stationary car to Moving car

Speed : 10 ~20 km/h

Moving Receiver

Camera

Max radio range :

Around 100 m for WLAN card

Stationary

Sender

slide13

Experiment at HSAL (2) :

Ad hoc Networking between Vehicles

Case III : Multihopping between stationary cars

About 60 m

About 30 m

Receiver

Relay

Video Sender

Stationary cars

Case IV : Transmission between Moving cars

About 20 ~40 m

Receiver

Video Sender

Speed : 60 ~80 km/h

slide14

Application example(3):

Security System, Emergency System

Application

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

Embedded Camera

Ad hoc Relay

Advantages

  • Instant networking in need on the scene

- Covering radio shadow of operator’s network

- Easy deployment of monitor cameras

slide15

Application example(4):

Home Networking

Advantages

  • 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

multihopping

ADSL

CATV

FTTH

slide16

Application example(5):

Office Networking

  • 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

Servers for Intranet

FW

・・・

Public WLAN area

Radius

IM/Mail

Web

Ad hoc Network between BSs

Internet

DMZ

GW

3G

IM/VoIP

IEEE802.1x

authentication

Instant Network by Ad hoc

IM/VoIP