Content delivery system for optimal vod streaming
Date Issued
2011-06-15
Author(s)
Jaureguizar, Fernando
Cabrera, Julián
García, Narciso
Abstract
The demand of video contents has rapidly
increased in the past years as a result of the wide
deployment of IPTV and the variety of services offered by
the network operators. One of the services that has
especially become attractive to the customers is real-time
video on demand (VoD) because it offers an immediate
streaming of a large variety of video contents. The price that
the operators have to pay for this convenience is the
increased traffic in the networks, which are becoming more
congested due to the higher demand for VoD contents and
the increased quality of the videos. As a solution, in this
paper we propose a hierarchical network system for VoD
content delivery in managed networks, which implements
redistribution algorithm and a redirection strategy for
optimal content distribution within the network core and
optimal streaming to the clients. The system monitors the
state of the network and the behavior of the users to
estimate the demand for the content items and to take the
right decision on the appropriate number of replicas and
their best positions in the network. The system’s objectives
are to distribute replicas of the content items in the network
in a way that the most demanded contents will have replicas
closer to the clients so that it will optimize the network
utilization and will improve the users’ experience. It also
balances the load between the servers concentrating the
traffic to the edges of the network.
increased in the past years as a result of the wide
deployment of IPTV and the variety of services offered by
the network operators. One of the services that has
especially become attractive to the customers is real-time
video on demand (VoD) because it offers an immediate
streaming of a large variety of video contents. The price that
the operators have to pay for this convenience is the
increased traffic in the networks, which are becoming more
congested due to the higher demand for VoD contents and
the increased quality of the videos. As a solution, in this
paper we propose a hierarchical network system for VoD
content delivery in managed networks, which implements
redistribution algorithm and a redirection strategy for
optimal content distribution within the network core and
optimal streaming to the clients. The system monitors the
state of the network and the behavior of the users to
estimate the demand for the content items and to take the
right decision on the appropriate number of replicas and
their best positions in the network. The system’s objectives
are to distribute replicas of the content items in the network
in a way that the most demanded contents will have replicas
closer to the clients so that it will optimize the network
utilization and will improve the users’ experience. It also
balances the load between the servers concentrating the
traffic to the edges of the network.
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