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Adaptive Session Duration for Efficient Pooling of Time and Space in Content Delivery


Mohammad Malli, Hassan Sbeity, Ahmad Fadlallah, Ali Hodroj, Abed-Ellatif Samhat


Vol. 16  No. 2  pp. 32-41


The availability of a wide variety of access technologies provides end- users (clients) with access to more than one communication network. In addition, service/content replication has become a trivial approach in overlay networks to provide a high availability of data and better Quality of Service (QoS). In this paper, we consider a multi-homed client seeking a replicated service/content in a Content Distributed Network (CDN), and we propose an adaptive model to improve the content distribution. This model is applied at the application level in a fully distributed way. It takes advantage of the connections “multiplicity” at both client and server sides in order to improve the content distribution. It consists of simultaneously downloading the requested content from the “best” server available through each client network interface. This is achieved in multiple sessions having adaptive durations estimated based on the passive measurement of network performance. In order to ensure the confidentiality of the content download, we enhance the model with an encryption scheme. Our measurement results show that our model is able to pool efficiently the network capacity over the space and time by improving considerably the latency.


Multihoming, Service Replication, Passive Measurement, Content Delivery, Confidentiality