Information processing system in which information expressing a current time point is transmitted from one computer to another for use in calculating an amount of delay in transferring data between the computers
First Claim
1. An information processing system comprising a first computer and second computer which mutually communicate via a data communication line, and time counter means for deriving time point information expressing successive current time point values and for providing said time point data to each of said first computer and second computer, with said first computer comprising first communication means for communicating with said second computer via said data communication line and said second computer comprising second communication means for communicating with said first computer via said data communication line, wherein:
- said first communication means periodically or at irregular intervals executes a transmission operation for transmitting time point information via said data communication line to said second communication means, said time point information expressing a first time point, that is derived by said time counter means prior to commencement of said transmission operation, and said second computer comprises delay calculation means for receiving said time point information from said second communication means, and for calculating a communication delay amount based on said first time point value and on a second time point value that is measured by said time counter means subsequent to reception of said time point information, said communication delay amount thereby including a time interval that elapses in transmitting data from said first computer to said second computer via said data communication line.
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Accused Products
Abstract
In a system in which a first computer transmits data to a second computer, the first computer transmits data conveying time information to the second computer, with the information expressing a first time point that occurs prior to commencement of the transmission and, following reception of the time information, the second computer compares the first time point information with a current time point, to thereby obtain a communication delay amount that includes a delay in transmitting data from the first to the second computer.
20 Citations
7 Claims
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1. An information processing system comprising a first computer and second computer which mutually communicate via a data communication line, and time counter means for deriving time point information expressing successive current time point values and for providing said time point data to each of said first computer and second computer, with said first computer comprising first communication means for communicating with said second computer via said data communication line and said second computer comprising second communication means for communicating with said first computer via said data communication line,
wherein: -
said first communication means periodically or at irregular intervals executes a transmission operation for transmitting time point information via said data communication line to said second communication means, said time point information expressing a first time point, that is derived by said time counter means prior to commencement of said transmission operation, and said second computer comprises delay calculation means for receiving said time point information from said second communication means, and for calculating a communication delay amount based on said first time point value and on a second time point value that is measured by said time counter means subsequent to reception of said time point information, said communication delay amount thereby including a time interval that elapses in transmitting data from said first computer to said second computer via said data communication line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification