PROTOCOL DELAY MEASURING DEVICE AND PROTOCOL DELAY MEASURING METHOD

摘要

A protocol delay measuring device (100) for preventing an increase of the processing overhead of a communication terminal attributed to a protocol delay measurement. The protocol delay measuring device (100) determines the protocol delay by using first and second timestamps created respectively before and after a processed packet is obtained from an unprocessed packet by IPsec processing by the communication terminal. An acknowledging section (104) creates an identifier of the unprocessed packet. A timestamp database (106) stores the created identifier along with the first timestamp and writes the identifier in a storage area where the identifier is kept the same before and after the IPsec processing by the communication terminal. A correlating section (108) reads the identifier from the storage area and extracts the first timestamp stored along with the same identifier as the read identifier in the timestamp database (106). A calculating section (110) calculates the difference between the extracted first timestamp and the second timestamp as the protocol delay.