Active networks and high speed content delivery

Future computer networks must be more flexible and faster then today. Active network paradigm is the way how to add flexibility to networks. During the last five years, a number of models for active networks realization were presented. In active networks, the concept of network as a distributed programmed facility is developed. This concept makes possible new applications and special services. Active network models are described and our active network model is described in more detail. We discus applications which need special network features and the position active routers and switches have in network infrastructure in order to satisfy these demands. An application which supports collaborative work, requiring data, audio and video streams to be transferred through the network is used to demonstrate how active network element can process dataflows with specific features in both uni- and multicast environments. An overly of active network elements placed in particular points of the non-intelligent high speed network is presented as a model which supports both the intelligence and high throughput without need of specialized costly hardware support

Mobile computing

Notebooks are replacing other personal computers in everyday use. Efficient use of such mobile devices requires a creation of an "illusion" of permanent high speed on-line connection. Infrastructure support including middle-ware services is necessary for such environment. E-mail, (distributed) filesystems or computational experiment steering are examples of services which utility is qualitatively increased by such a support. A model of middle-ware support that is based on tunneling and caching is presented. It is also shown how the requirements for mobile computing support are in many aspects analogous to those needed to build large scale GRID systems. Information systems, services discovery, and security issues are discussed

Active networks and high speed content delivery

Abstract: Future computer networks must be more flexible and faster then today. Active network paradigm is the way how to add flexibility to networks. During the last five years, a number of models for active networks realization were presented. In active networks, the concept of network as a distributed programmed facility is developed. This concept makes possible new applications and special services. Active network models are described and our active network model is described in more detail. We discus applications which need special network features and the position active routers and switches have in network infrastructure in order to satisfy these demands. An application which supports collaborative work, requiring data, audio and video streams to be transferred through the network is used to demonstrate how active network element can process dataflows with specific features in both uni- and multicast environments. An overly of active network elements placed in particular points of the non-intelligent high speed network is presented as a model which supports both the intelligence and high throughput without need of specialized costly hardware support