Deploying an Active Voice Application on a Three-Level Active Network Node Architecture

Active networks have been recently highlighted as a key enabling technology to obtain immense flexibility in terms of network deployment, configurability, and customized packet processing. However, this flexibility is often achieved at the cost of router performance. In this paper, we present a three-level node architecture that combines flexibility and high performance of network nodes. We design and implement an active network application for real-time speech transmissions on top of this three-level platform. In our application, plug-in modules are downloaded onto certain network nodes to monitor packet loss rate of voice streams and to perform application-specific packet processing when necessary. In particular, we propose to perform loss concealment algorithms for voice data streams at active network nodes to regenerate lost packets. The regenerated speech data streams are robust enough to tolerate further packet losses along the data path so that the concealment algorithms at anot...

• Type: Conference
• Year: 2001
• Where: IWAN
• Authors: Georg Carle, Henning Sanneck, Sebastian Zander, Long Le
• Keywords: Active Network, Computer Networks, IWAN 2001, Network Nodes, Packet Processing