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arXiv · 2605.15715

Optimum Peer-Turbo: A Scalable and Efficient Solution for P2P Broadcasting

Muriel Médard·Kishori Konwar·Moritz Grundei·Vipindev Adat Vasudevan
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Abstract

Blockchain systems such as Solana or Monad employ tree- or star-shaped broadcast topologies in which a single source node disseminates message shards to a set of target peers within a strictly bounded time window. In these architectures, shard propagation must complete before the next consensus step, making timely delivery to a large fraction of the validator set essential. A fundamental limitation of such designs is that the outbound bandwidth of the source node constitutes the primary system bottleneck. In this paper, we introduce peer Turbo, a technique that allows target nodes to exchange shards using Random Linear Network Coding (RLNC), thereby assisting each other in completing decoding without requiring explicit shard state coordination. We use a tractable fluid approximation of the degree of freedom distribution of peer-Turbo-enabled systems show that this approach reduces source bandwidth required for a set service quality by up to one order of magnitude, or equivalently reduces propagation latency by one order of magnitude under fixed bandwidth constraints.

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Muriel Médard, Kishori Konwar, Moritz Grundei, Vipindev Adat Vasudevan. 2026-05-15. Optimum Peer-Turbo: A Scalable and Efficient Solution for P2P Broadcasting. https://arxiv.org/abs/2605.15715

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