Low_Extra_Delay_Background_Transport
LEDBAT
Delay-based congestion control algorithm
Low Extra Delay Background Transport (LEDBAT) is a way to transfer data on the Internet quickly without clogging the network.[1] LEDBAT was invented by Stanislav Shalunov[2][3] and is used by Apple for software updates, by BitTorrent for most of its transfers[4] and by Microsoft SCCM software distribution points.[5] At one point in time, LEDBAT was estimated to carry 13–20% of Internet traffic.[4][6][3]
LEDBAT is a delay-based congestion control algorithm that uses all the available bandwidth while limiting the increase in delay;[2][7] it does so by measuring one-way delay and using changes in the measurements to limit congestion that the LEDBAT flow itself induces in the network. LEDBAT is described in RFC 6817.