all rights reserved, copyright, 2002, hitachi europe sas ad hoc networks: applications and merits...
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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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To
po
log
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nit
or i
ng
To
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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)
To
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log
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mo
nit
or i
ng
To
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log
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nit
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