Advanced Wireless Technologies

1. Advanced Wireless Technologies
Topic: Voice Over IP Network(VoIP)
Shashikant V. Athawale
Assistant Professor
Department of Computer Engineering, AISSMS
COE ,Pune

2. Agenda
• What is VoIP
• VoIP Architecture
• VoIP Applications

3. What is VoIP
• Voice over IP (VOIP) uses the Internet
Protocol (IP) to transmit voice as
packets over an IP network.
• Provide Many services to clients.
• VoIP use in many Browsers.

4. Why Use VoIP
• Cost savings.
• Open standards—h.323, sip, mgcp.
• Multi-vendor interoperability.
• Integrated ip voice and data networks.

5. How VoIP Works
Fig 1: Simple VoIP in day today life

6. Contd..
Fig 2:VoIP works in Internet

7. VoIPArchitecture

8. VoIP Protocols
• H.323
• SIP
• MGCP
• H.248
• Megaco

9. VoIPApplications
• Broadly Used Over Internet Browsing.
• Used in Voice Processing.
• Perceived quality of the PSTN at much
lower cost. VoIP systems.
• must be flexible and to allow a mix of
public and private services and to adapt
to local regulations.

10. Vehicular Network

11. Agenda
• What is Vehicular Network.
• Vehicular Network Communication.
• Vehicular Network Architecture.
• Features Of Vehicular Network .
• Protocols Of Vehicular Network.
• Vehicular Network Applications.

12. What is Vehicular Network
• Vehicular Ad Hoc Networks (VANETs)
are created by applying the principles
of MANETs.
• Vehicles Transformed into “Computers
on the Wheels” or “Networks on the
Wheel”.

13. Vehicular Communication

14. Contd...
 Vehicular Communication System (VCS):- Two main
type of communications:
1. Vehicle to Vehicle Communication.
2. Vehicle to Infrastructure Communication.
 Communication between V2V and V2I are “ad-hoc"
in nature.
 This special kind of communication network is
known as
“Vehicular Ad-hoc Network (VANET)”
 VANET will become Worlds largest ad-hoc network

15. Vehicle To Vehicle Communication
High bandwidth link with vehicle and roadside
equipment.
Roadside units broadcast messages.

16. Vehicle to Infrastructure
communication
Uses multi-hop/multi cast technique.
 uses two type of broadcasting
1. naive broadcasting
2. intelligent broadcasting

17. Vehicular Network Architecture

18. Features Of Vehicular Network
• Dynamic topology
• Mobility models
• Infinite energy supply
• Localization functionality

19. Protocols In Vehicular Network
• Routing Protocols:
-Position-based Routing (Unicast)
-Geocasting Routing (Multicast)
-Broadcast Routing

20. VoIPApplications
• Electronic brake lights.
• Platooning.
• Traffic information systems.
• Traffic safety
• Traffic management services

21. Delay Tolerant Network

22. Agenda
• What is Delay Tolerant Network.
• Key Properties Of Delay Tolerant Network.
• Characteristics Of Delay Tolerant Network.
• Delay Tolerant Network Architecture
• Delay Tolerant Network Applications

23. What is Delay Tolerant Network
• Delay-tolerant networking (DTN) is an
approach to computer network which address the
technical issues in heterogeneous net work that
may lack network connectivity.
• Delay tolerant Network is set of protocols act
together performing store carry and forward
communication.

24. Contd..
• Communication is possible even if end-to-end
connectivity is never achievable.
• Exploiting node’s mobility.
• Using store-carry-forward fashion.

25. How Delay tolerant Network
Works

26. Contd..

27. Key Properties Of DTNs
• High Latency
• Low Data Rate
• Disconnection
• Long Queuing Delay
• Short Range Contact
• Dynamic Network Topology

28. Characteristics of DTN.
• Characteristics of DTN
– No end-to-end path
– Intermittent connectivity
– Dynamic topology
– Long delay
• DTN routing
– Flooding-based: redundancy
– Forwarding-based: require topology information

29. Delay Tolerant Network
Architecture

30. Delay Tolerant Network
Applications
• Telemedicine for Developing Regions
• DTN-based Social Network Service
• Communication in the Presence of
Oppressive Governments
• File Sharing and Bulk Data Transfer
• Share Air Minutes