RaptorQ: The Black Magic of Liquid Data

11 hours ago

RaptorQ is an impressive technology that allows arbitrary files to be turned into fungible blobs for transmission.
Receivers can reconstruct the original data from blobs received in any order with under 5% overhead.
It often needs just two extra symbols beyond the minimum for near-certain decoding, making it efficient.
Traditional TCP relies on feedback loops, which fail in high-latency or large-scale broadcast scenarios like Mars communication or cellular networks.
RaptorQ eliminates feedback implosion by treating data as a mathematical liquid, spraying packets; receivers decode once they collect enough symbols.
RFC 6330 mandates decoder performance: decode failure rates drop sharply with slight increases in symbols received.
Overhead includes precode expansion (~2.5%) and LT layer, keeping total system overhead under 5%.

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