Distributing media transformation over multiple media gateways

Abstract

Media gateways have been proposed as a solution to the network heterogeneity problem in media multicasting. Services on the gateways transform media streams as they flow through the gateways. In this paper, we present our work on composable services in media gateways. A user can request a computation to be performed on a set of media streams. The system then distributes the computation over multiple gateways for execution. We present an algorithm for decomposing the computation into sub-computations, and an application-level protocol that locates appropriate media gateways to run these sub-computations.