Patent ID: 8625446

Claim:
A communication device, comprising: a storage section that stores both a first profile that represents relationships between delay times premeasured over a transmission path and occurrence frequencies of the delay times and measurement periods of time for which the delay times over said transmission path are measured such that said first profile and the measurement periods of time are correlated; a measurement period-of-time obtainment section that obtains a measurement period of time correlated with the first profile from said storage section if a second profile that represents relationships between delay times measured to obtain said measurement period of time and occurrence frequencies of the delay times matches said first profile; a delay time computation section that measures the delay times over said transmission path; a mean value computation section that computes a mean value of the delay times measured to obtain said measurement period of time and that said delay time computation section measured for said measurement period of time; and a comparison section that compares said first profile and said second profile, wherein said comparison section compares at least a part of said first profile and at least a part of said second profile, and said measurement period-of-time obtainment section obtains said measurement period of time correlated with said first profile from said storage section if at least the part of said first profile and at least said part of said second profile compared by said communication device are same.