Resilient peer-to-peer multicast from the ground up

This work introduces Nemo, a novel peer-to-peer multicast protocol that aims at achieving this elusive goal. Based on two techniques: (1) co-leaders; and, (2) triggered negative acknowledgments (NACKs), Nemo´s design emphasizes conceptual simplicity and minimum dependencies (Anderson et al., 2002), thus achieving, in a cost-effective manner, performance characteristics resilient to the natural instability of its target environment. Simulation-based and wide-area experimentations show that Nemo can achieve high delivery ratios (up to 99.98%) and low end-to-end latency similar to those of comparable protocols, while significantly reducing the cost in terms of duplicate packets (reductions > 85%) and control related traffic, making the proposed algorithm a more scalable solution to the problem.