Delay measuring device, measurement object device and communication system
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United States of America Patent
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Aug 21, 2018
Grant Date -
Aug 17, 2017
app pub date -
Sep 15, 2015
filing date -
Sep 16, 2014
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Abstract
A delay measuring device of a communication system that includes the delay measuring device sequentially transmitting and receiving frames having a known frame length, and a measurement object device serving as an object for measuring a round trip time by the delay measuring device, includes: an RTT measuring unit to measure a round trip time with respect to the measurement object device a number of times using information for delay measurement in the frame; an RTT change detection unit to detect a change of a value of the round trip time based on the values of the round trip time thus measured; and an RTT determination unit to determine a value of the round trip time to be adopted, from among the values of the round trip time, based on the change of a value of the round trip time.
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