A Retransmission Control Algorithm for Low-Latency UDP Stream on StreamCode-Base Active Networks

We propose an algorithm for real-time data stream that achieves low latency as well as low packet loss rate. In our algorithm a sequence number is included in each packet, and it is renumbered as if there is no packet loss in the upper stream when a packet loss and corresponding packet retransmission occurs. This conceals the packet loss and its recovery from succeeding nodes in the downstream, thus simplifies packet processing in succeeding nodes. This algorithm can easy be implemented on capsule-type active networks, and we evaluated this algorithm on StreamCode based active networks. It is implemented with 1.0k line in-packet programs plus node initialization programs, and the evaluation results show that 27.1% end-to-end packet loss rate is suppressed to around 5.6%.