An application level video gateway
Proceedings of the third ACM international conference on Multimedia
An architecture for active networking
HPN '97 Proceedings of the IFIP TC6 seventh international conference on High performance netwoking VII
Multicasting Multimedia Streams with Active Networks
LCN '98 Proceedings of the 23rd Annual IEEE Conference on Local Computer Networks
ICASSP '99 Proceedings of the Acoustics, Speech, and Signal Processing, 1999. on 1999 IEEE International Conference - Volume 02
A survey of active network research
IEEE Communications Magazine
Deploying an Active Voice Application on a Three-Level Active Network Node Architecture
IWAN '01 Proceedings of the IFIP-TC6 Third International Working Conference on Active Networks
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Recently, active networks have been highlighted as a key enabling technology to obtain immense flexibility in terms of network deployment, configurability, and packet processing. Exploiting this flexibility, we present an active network application for real-time speech transmission where plugin modules are downloaded onto certain network nodes to perform application-specific packet processing. 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 another downstream node or at the receiver can still take effect. We call our approach active concealment for speech transmission to distinguish it from concealment performed at the receiver. Our approach is bandwidth-efficient and retains the applications' end-to-end semantics.