advanced wireless technologies
TRANSCRIPT
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Advanced Wireless Technologies
Topic: Voice Over IP Network(VoIP)
Shashikant V. AthawaleAssistant Professor
Department of Computer Engineering, AISSMS COE ,Pune
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Agenda
• What is VoIP
• VoIP Architecture
• VoIP Applications
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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.
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Why Use VoIP
• Cost savings.
• Open standards—h.323, sip, mgcp.
• Multi-vendor interoperability.
• Integrated ip voice and data networks.
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How VoIP Works
Fig 1: Simple VoIP in day today life
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Contd..
Fig 2:VoIP works in Internet
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VoIP Architecture
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VoIP Protocols
• H.323• SIP • MGCP • H.248 • Megaco
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VoIP Applications
• 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.
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Vehicular Network
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Agenda • What is Vehicular Network.
• Vehicular Network Communication.
• Vehicular Network Architecture.
• Features Of Vehicular Network .
• Protocols Of Vehicular Network.
• Vehicular Network Applications.
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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”.
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Vehicular Communication
Internet
Internet Gateway
Vehicle
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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
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Vehicle To Vehicle Communication
High bandwidth link with vehicle and roadside equipment.
Roadside units broadcast messages.
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Vehicle to Infrastructure communication
Uses multi-hop/multi cast technique.
uses two type of broadcasting 1. naive broadcasting 2. intelligent broadcasting
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Vehicular Network Architecture
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Features Of Vehicular Network
• Dynamic topology
• Mobility models
• Infinite energy supply
• Localization functionality
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Protocols In Vehicular Network
• Routing Protocols:
-Position-based Routing (Unicast)
-Geocasting Routing (Multicast)
-Broadcast Routing
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VoIP Applications
• Electronic brake lights.• Platooning.• Traffic information systems.• Traffic safety• Traffic management services
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Delay Tolerant Network
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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
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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.
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Contd..
• Communication is possible even if end-to-end connectivity is never achievable.
• Exploiting node’s mobility.
• Using store-carry-forward fashion.
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How Delay tolerant Network Works
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Contd..
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Key Properties Of DTNs• High Latency
• Low Data Rate
• Disconnection
• Long Queuing Delay
• Short Range Contact
• Dynamic Network Topology
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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
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Delay Tolerant Network Architecture
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Delay Tolerant NetworkApplications
• 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