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Enhancing Abstract Multiparty Transport through Network Coding

Coutinho, N. ; Sargento, S. ; Prior, R.

Enhancing Abstract Multiparty Transport through Network Coding, Proc IEEE GLOBECOM International workshop on Control Techniques for Efficient Multimedia Delivery - CTEMD, Atlanta, United States, Vol. -, pp. - - -, December, 2013.

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Abstract
In recent years there has been an increasing interest
in multiparty multimedia services that, associated with the
new trends in content consumption (e.g. mobility, heterogeneity,
high-definition), raised novel challenges. This fact motivates the
research towards new techniques that are capable of improving
the user experience while simultaneously making a rational use
of the network resources. Network Coding (NC) is one of those
techniques. It has gained a notorious relevance due to its ability
to optimize network throughput and resilience to packet losses. In
this work we propose a context-driven framework for multiparty
content delivery using NC to enhance the reliability of the services
provided. We propose and evaluate two different approaches:
a static one, where the level of redundancy remains constant,
and a dynamic one, where the control framework autonomously
adjusts the redundancy to the sensed quality of service, deriving
coding parameters from network context information. We found
that while the static scheme achieves better results in terms of
recovered information, it comes at the cost of sometimes excessive
redundant information. On the other hand, tuning NC with
context parameters in the dynamic scheme saves more network
resources with a small penalty in the recovered information.