Protocol delay measuring device and protocol delay measuring method

A protocol latency measuring method for measuring protocol latency due to internet protocol security processing in a communication terminal, the protocol latency measuring method comprising:

• generating an identifier of an unprocessed packet, the unprocessed packet being a packet before the internet protocol security processing;
• storing the generated identifier with a first time stamp;
• writing the generated identifier in a storage region that maintains the identifier same before and after the internet protocol security processing in the communication terminal;
• retrieving the identifier written in the storage region;
• extracting the first time stamp stored in the database, with a same identifier as the retrieved identifier;
• and
• calculating a difference between the extracted first time stamp and a second time stamp as protocol latency due to the internet protocol security processing, wherein
• the identifier includes an index number that guarantees a same packet before and after the internet protocol security processing, the index number being assigned to the unprocessed packet,
• intercepting the unprocessed packet and the processed packet and returning each of the intercepted processed and unprocessed packets to a respective interception point;
• and
• the index number of the unprocessed packet is a same as an index number of a corresponding processed packet, the processed packet being a packet after the internet protocol security processing.

A protocol latency measuring apparatus that measures protocol latency due to internet protocol security processing in a communication terminal, the protocol latency measuring apparatus comprising:

• an identifier generator that generates an identifier of an unprocessed packet, the unprocessed packet being a packet before the internet protocol security processing;
• a database that stores the generated identifier with a first time stamp;
• a writer that writes the generated identifier in a storage region which maintains the identifier same before and after the internet protocol security processing in the communication terminal;
• a retriever that retrieves the identifier written in the storage region;
• an extractor that extracts the first time stamp stored in the database, with a same identifier as the retrieved identifier;
• a calculator that calculates a difference between the extracted first time stamp and a second time stamp, as the protocol latency due to the internet protocol security processing;
• an interceptor that intercepts the unprocessed packet and a processed packet, the processed packet being a packet after the internet protocol security processing and that returns each of the intercepted processed and unprocessed packets to a respective interception point;
• and
• a time stamp generator that generates the first time stamp when the unprocessed packet is intercepted and that generates the second time stamp when the processed packet is intercepted.

A protocol latency measuring method for measuring protocol latency due to internet protocol security processing in a communication terminal, the protocol latency measuring method comprising:

• generating an identifier of an unprocessed packet, the unprocessed packet being a packet before the internet protocol security processing;
• storing the generated identifier with a first time stamp;
• writing the generated identifier in a storage region that maintains the identifier same before and after the internet protocol security processing in the communication terminal;
• retrieving the identifier written in the storage region;
• extracting the first time stamp stored in the database, with a same identifier as the retrieved identifier;
• calculating a difference between the extracted first time stamp and a second time stamp as protocol latency due to the internet protocol security processing;
• intercepting the unprocessed packet and a processed packet, the processed packet being a packet after the internet protocol security processing and returning each of the intercepted processed and unprocessed packets to a respective interception point;
• generating the first time stamp when the unprocessed packet is intercepted;
• and
• generating the second time stamp when the processed packet is intercepted.