This document discusses several topics related to advanced wireless technologies, including Voice over IP networks (VoIP), vehicular networks, and delay tolerant networks. It provides overviews and definitions of each topic, describing key aspects like VoIP architecture and protocols, vehicular communication methods between vehicles and infrastructure, and the store-carry-forward approach used in delay tolerant networks to allow communication in intermittent connectivity scenarios. Application examples are also given for each such as using VoIP for voice calls over the internet, safety and traffic applications in vehicular networks, and file sharing or telemedicine over delay tolerant networks.

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