SDN SOFTWARE-DEFINED NETWORK CONTROLLER FOR CONTROLLING MESSAGE TRANSMISSION TO SWITCH BASED ON PROCESSING COMPLETION DELAY TIME OF MESSAGE AND METHOD THEREOF

摘要

The present invention relates to an operation method of a software-defined network (SDN) controller connected to at least one switch. Disclosed is the operation method of the SDN controller which comprises the steps of: obtaining first time information for transmitting a message to at least one switch from log information of the SDN controller and second time information for receiving a response message to the message from the at least one switch; calculating a processing delay time of at least one message for each switch based on the first time information and the second time information; and controlling a transmission time of a next message to be transmitted to the at least one switch based on the processing delay time.