Effect of Clustering in Map-based Mobility Model on the Performance Issues of Routing Protocols in Delay Tolerant Networks

In This paper analyze the Effect of Clustering in Map-based Mobility Model on the Performance of Routing Protocols in Delay Tolerant Networks propose a new analysis in mobility models for DTN using Epidemic routing, First Contact Routing, and Direct Delivery Routing. This paper presents two scenarios. ONE Simulator is used to perform these scenarios. Map-based mobility model focus on the movement of node on predefines location on the map. It gives the ability to characterize the behavior and performance of routing schemes, which facilitates one to select appropriate routing protocol for the application or the network in hand. The various DTN routing protocols considered for comparison are Direct Delivery, First Contact, Epidemic routing. Among these protocols: the first three routing protocols do not require any knowledge about the network. The results and analysis show that the proposed Clustered map based mobility model increases throughput, increases delivered packets. Hence the Epidemic routing scheme perform best results different to the first contact routing and direct delivery routin

Content storage and retrieval mechanisms for vehicular delay-tolerant networks

Vehicular delay-tolerant networks (VDTNs) were proposed as a novel disruptive network concept based on the delay tolerant networking (DTN) paradigm. VDTN architecture uses vehicles to relay messages, enabling network connectivity in challenging scenarios. Due to intermittent connectivity, network nodes carry messages in their buffers, relaying them only when a proper contact opportunity occurs. Thus, the storage capacity and message retrieving of intermediate nodes directly affects the network performance. Therefore, efficient and robust caching and forwarding mechanisms are needed. This dissertation proposes a content storage and retrieval (CSR) solution for VDTN networks. This solution consists on storage and retrieval control labels, attached to every data bundle of aggregated network traffic. These labels define cacheable contents, and apply cachecontrol and forwarding restrictions on data bundles. The presented mechanisms gathered several contributions from cache based technologies such as Web cache schemes, ad-hoc and DTN networks. This solution is fully automated, providing a fast, safe, and reliable data transfer and storage management, while improves the applicability and performance of VDTN networks significantly. This work presents the performance evaluation and validation of CSR mechanisms through a VDTN testbed. Furthermore it presents several network performance evaluations and results using the well-known DTN routing protocols, Epidemic and Spray and Wait (including its binary variant). The comparison of the network behavior and performance on both protocols, with and without CSR mechanisms, proves that CSR mechanisms improve significantly the overall network performance

Survey and comparison of operating concept for routing protocols in DTN

Delay Tolerant Network (DTN) are promising techniques to enable data transmission in challenging scenarios where sophisticated infrastructure is not available and the end-to-end path does not exist at the moment of data transmission.These networks are characterized by a long delay, intermittent connectivity and high error rates.Furthermore, the dynamic topology of the network may change randomly.Therefore, routing is one of the most crucial issues that affect the performance of DTN in terms of data delivery, latency and using resources if node mobility is considered.The routing design in DTN raises many challenges to the networks.Therefore, the problem of how to route a packet from one node to another in DTN is of the essence. This paper puts forward a rigorous survey of various routing protocols as well as performs a comparison of diverse routing strategies regarding significant issues in DTN