Advances in networking and content delivery systems are enabling new challenging provisioning sce-narios where a growing number of users access Video on Demand (VoD), possibly while moving among different points of attachment to the Internet and using different access terminals. This calls for novel middlewares capable of supporting personal-ized VoD access by dynamically activating intermediate nodes between VoD servers and clients. The paper proposes MUMOC, a dynamic and flexible overlay infrastructure for the distributed caching of both VoD prefixes and VoD metadata. To achieve openness and easy interoperability with legacy VoD services, MUMOC adopts standard XML-based formats, based on both Dublin Core and MPEG7, to represent VoD metadata. First experimental results show that MUMOC significantly reduces bandwidth utilization and user perceived delays. In addition, notwithstanding the dynamic building of the overlay network and the application-level approach, the introduced overhead is compatible with the strict re-quirements imposed by multimedia distribution over the best-effort Internet.

MUMOC: an Active Infrastructure for Open Video Caching

BELLAVISTA, PAOLO;CORRADI, ANTONIO;FOSCHINI, LUCA
2005

Abstract

Advances in networking and content delivery systems are enabling new challenging provisioning sce-narios where a growing number of users access Video on Demand (VoD), possibly while moving among different points of attachment to the Internet and using different access terminals. This calls for novel middlewares capable of supporting personal-ized VoD access by dynamically activating intermediate nodes between VoD servers and clients. The paper proposes MUMOC, a dynamic and flexible overlay infrastructure for the distributed caching of both VoD prefixes and VoD metadata. To achieve openness and easy interoperability with legacy VoD services, MUMOC adopts standard XML-based formats, based on both Dublin Core and MPEG7, to represent VoD metadata. First experimental results show that MUMOC significantly reduces bandwidth utilization and user perceived delays. In addition, notwithstanding the dynamic building of the overlay network and the application-level approach, the introduced overhead is compatible with the strict re-quirements imposed by multimedia distribution over the best-effort Internet.
2005
1st International Conference on Distributed Frameworks for Multimedia Applications (DFMA'05)
64
71
P. Bellavista; A.Corradi; L. Foschini
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/4676
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 0
social impact