Title:
On the Performance of a Multicast Delivery Video-On-Demand Service with Discontinuous VCR Actions
On the Performance of a Multicast Delivery Video-On-Demand Service with Discontinuous VCR Actions
Author(s)
Ammar, Mostafa H.
Almeroth, Kevin C.
Almeroth, Kevin C.
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Abstract
In most proposed architectures for Video-On-Demand (VOD) systems, the
customers are serviced individually by allocating and dedicating a trans-
mission channel and a set of video server resources to each customer.
This approach leads to an expensive-to-operate, non-scalable system.
We consider a VOD system that uses multicast delivery to service multiple
customers with a single set of resources. The use of multicast requires
that some interactivity and part of the on-demand nature of the system
are sacrificed to achieve scalability and cost-effectiveness. Previous
work has considered how VCR actions could be handled in this type of
system through the provisioning of set-top box buffering. In this paper
we consider a modification of the semantics of the VCR functions in order
to avoid this buffering requirement. In particular we consider the
provision of discontinuous VCR actions in which the duration of the
action is specified in integer multiples of a specified time increment.
We evaluate the performance of this system through the use of simulation
and compare its performance with an individual delivery (unicast) system
and a multicast system with continuous VCR actions.
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Date Issued
1994
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295515 bytes
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Text
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Technical Report