Method and apparatus for controlling frame transmission

A method of controlling data transmission, wherein the method controls transmission of at least one first packet having a first priority and at least one second packet having a second priority which are output from an identical port, and controls the at least one packet to be transmitted relatively precedent than the at least one second packet, the method comprising:

• performing a gate control of
• opening a gate of an output queue to which the at least one first packet is transferred, and closing a gate of an output queue to which the at least one second packet is transferred;
• or
• closing the gate of the output queue to which the at least one first packet is transferred, and opening the gate of the output queue to which the at least one second packet is transferred, wherein a transmission control command indicating stopping or resuming the transmission of the at least one second packet is generated at a timing relatively before a timing when the gate control is performed.

An apparatus for controlling frame transmission, the apparatus comprising:

• a list configuration unit managing a parameter related to a gate control;
• a cycle timer unit managing a start timing of a cycle;
• and
• a list executing unit performing the gate control based on the parameter provided form the list configuration unit and the cycle timer unit,
• wherein the list executing unit includes:
• a cycle executing state machine setting an expiration time of at least one time section included in the cycle, checking gate operation information in association with a list pointer indicating the at least one time section, performing a control in association with the gate operation information, and updating the list pointer into a value of a next time section included in the cycle,
• a next cycle operation determining the updated gate operation information corresponding to the updated list pointer, and performing the control in association with the updated gate operation information,
• a next cycle operation checking state machine checking gate operation information in association with a following temporal section.