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Publisher Summary This chapter describes the basic concepts and architecture of a media overlay, which adds resources to an existing network infrastructure to enhance the media capability of the network. A media overlay can enable new media capabilities in the network, while improving the end-user media performance and the system-wide efficiency of the network for both its media and nonmedia traffic. This is achieved by leveraging the underlying resources and existing connectivity provided by the original network, while enhancing it to improve its ability to deliver real-time media to end-users and scaling to support a large number of users. The term “overlay” refers to the approach of adding resources on top of an existing network infrastructure. This has the advantage of leveraging the attributes of the existing infrastructure, such as its existing deployment, widespread connectivity, and built-in network services—domain name services (DNS) and system management. |
