Umlaufzeitabschätzungsverfahren und Einrichtung mittels Rückquittierung in einem Paketübertragungssystem

摘要

The present invention is related to a method for the non-invasive estimation of the round trip time (RTT) in a packet oriented acknowledge-based transmission system, by means of a probe monitoring the signals transmitted between a sender and a receiver comprising the following steps: a) for a presetable number of subsequent acknowledgements within a time interval (Wack) a1) comparing the timestamps of the sequence of acknowledgements with the timestamps of the packets received by the probe before the acknowledgements to determine an estimated value for the round trip time probe-receiver. (RTTpr); a2) comparing the timestamps of the sequence of acknowledgements with the timestamps of the packets received by the probe after the acknowledgements to determine an estimated value for the round trip time probe-sender (RTTps); b) Adding the estimated values for the round trip time probe receiver and the round trip time probe sender for determination of an estimated value for the round trip time (RTT). The invention also relates to a device designed to carry out such method.