A framework for building complex netcentric systems on Active Network

Active applications can add value to communication. Yet it involves sophisticated domain knowledge and complex development process. In this paper we discuss a framework for the construction of complex active network applications. Its design motivation is to enable an expert to develop complex active applications as a value added communication service and make it available for repeated use by the end-applications. As a test case we select a self-organizing adaptive video transcoding channel. This multi-component multi-tier novel active application enables video to propagate over extreme network with highly asymmetric link and node capacity. At the same time it offers a unified channel abstraction to its service subscriber. In this paper we focus how this channel abstraction can be composed within the proposed active service composition framework.