Advanced Computer Networks

Topic: Delay Tolerant Network

Shashikant V. AthawaleAssistant Professor

Department of Computer Engineering, AISSMS COE ,Pune

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

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.

Contd..

• Communication is possible even if end-to-end connectivity is never achievable.

• Exploiting node’s mobility.

• Using store-carry-forward fashion.

How Delay tolerant Network Works

Contd..

Key Properties Of DTNsHigh Latency

Low Data Rate

Disconnection

Long Queuing Delay

Short Range Contact

Dynamic Network Topology

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

Delay Tolerant Network Architecture

Delay Tolerant NetworkApplicationsTelemedicine for Developing

RegionsDTN-based Social Network ServiceCommunication in the Presence of

Oppressive GovernmentsFile Sharing and Bulk Data TransferShare Air Minutes