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Ad Hoc Networks: Applications and Merits

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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Ad Hoc Networks: Applications and Merits

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  1. 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

  2. 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

  3. 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

  4. 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

  5. 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)

  6. 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

  7. 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

  8. 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)

  9. 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)

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

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