BWE_DataFlow cluster_delay Delay-Based Estimation cluster_probe Probe System cluster_pacer Pacing System cluster_alr ALR System TWCC TWCC Feedback (from remote) SSBE SendSide Bandwidth Estimator TWCC->SSBE TwccSendRecord[] ABE Acked Bitrate Estimator TWCC->ABE acked packets LC Loss Controller TWCC->LC packet results PE Probe Estimator TWCC->PE TwccSendRecord[] (filtered by cluster) Application Application Network Network (packets out) SSBE->Application bandwidth estimate DC Delay Controller SSBE->DC probe result SSBE->PE start probe (ProbeClusterConfig) ALR ALR Detector SSBE->ALR media sent Pacer Pacer (LeakyBucket + ProbeClusterState) SSBE->Pacer start probe (ProbeClusterConfig) PacerCtrl Pacer Control SSBE->PacerCtrl estimate DC->SSBE delay estimate AGA Arrival Group Accumulator DC->AGA acked packets TE Trendline Estimator AGA->TE InterGroupDelayDelta RC Rate Control (AIMD) TE->RC BandwidthUsage (overuse/normal/underuse) RC->DC estimated bitrate ABE->DC instantaneous bitrate ABE->LC instantaneous bitrate LC->SSBE loss estimate PC Probe Control PC->SSBE ProbeClusterConfig PE->SSBE ProbeResult LCE Link Capacity Estimator PE->LCE ALR probe results ALR->LC ALR state (start time) ALR->PC ALR state (start time) LCE->LC capacity estimate Pacer->Network paced packets (with cluster ID) Pacer->SSBE probe complete (cluster_id) PacerCtrl->Pacer pacing_rate padding_rate