org.ros.time.RemoteUptimeClock.LatencyOutlierFilter Class Reference

List of all members.

Public Member Functions
boolean	add (double latency)
double	getMedian ()
	LatencyOutlierFilter (int sampleSize, double threshold)
Private Attributes
final Queue< Double >	latencies
final int	sampleSize
final double	threshold

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Detailed Description

Uses a sliding window and percentile range to detect latency outliers.

When receiving remote uptime measurements, the latency of the measurement is used to estimate the local uptime at the point when the remote uptime was measured. This calculation assumes that any measurement latency is symmetrical. The larger the latency, the larger the potential error in our estimate of local uptime at the measured remote uptime.

To reduce the effect of measurements with higher uncertainty, we filter out measurements with latencies that exceed the specified percentile within our sliding window.

Definition at line 117 of file RemoteUptimeClock.java.

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Constructor & Destructor Documentation

org.ros.time.RemoteUptimeClock.LatencyOutlierFilter.LatencyOutlierFilter	(	int	sampleSize,
		double	threshold
	)		[inline]

Definition at line 123 of file RemoteUptimeClock.java.

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Member Function Documentation

boolean org.ros.time.RemoteUptimeClock.LatencyOutlierFilter.add

(

double

latency

)

[inline]

Parameters:

latency

Returns:

 true 

if the provided latency is outside the configured percentile,

 false 

otherwise

Definition at line 136 of file RemoteUptimeClock.java.

double org.ros.time.RemoteUptimeClock.LatencyOutlierFilter.getMedian

(

)

[inline]

Definition at line 151 of file RemoteUptimeClock.java.

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Member Data Documentation

final Queue<Double> org.ros.time.RemoteUptimeClock.LatencyOutlierFilter.latencies [private]

Definition at line 121 of file RemoteUptimeClock.java.

final int org.ros.time.RemoteUptimeClock.LatencyOutlierFilter.sampleSize [private]

Definition at line 119 of file RemoteUptimeClock.java.

final double org.ros.time.RemoteUptimeClock.LatencyOutlierFilter.threshold [private]

Definition at line 120 of file RemoteUptimeClock.java.

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The documentation for this class was generated from the following file:

• RemoteUptimeClock.java