Method for packet transmission apparatus to transmit packet in real time, packet transmission apparatus, and computer program

A method for a packet transmission apparatus to transmit a packet in real time, the method comprising:

• receiving, by the packet transmission apparatus, a request for a service of a second quality from a user terminal to which the service is being provided with a first quality that is lower than the second quality;
• transmitting, by the packet transmission apparatus, packets for providing the service with the first quality to the user terminal in a duplicate manner while providing the service to the user terminal with the first quality;
• increasing, by the packet transmission apparatus, a transmission amount of the packets transmitted in the duplicate manner until a sum of the transmission amount of the packets for providing the service with the first quality and the transmission amount of the packets transmitted in the duplicate manner is equal to the transmission amount of the packets for providing the service with the second quality;
• and
• in response to network congestion being sensed while increasing the transmission amount of the packets transmitted in the duplicate manner, notifying, by the packet transmission apparatus, the user terminal that it is not possible to provide the service with the second quality, and providing the service with the first quality.

A packet transmission apparatus comprising:

• a memory configured to store a computer program;
• and
• at least one processor configured to read and execute the computer program,
• wherein the computer program comprises:
• a network congestion detection operation of determining whether a buffer occupancy is greater than or equal to a threshold value, extracting a degree of influence of a packet on quality of experience (QoE) in response to the buffer occupancy being greater than or equal to the threshold value, and sensing network congestion based on whether the degree of influence of the packet on QoE is less than or equal to a predetermined value;
• and
• a rate decreasing operation of dropping the packet before the packet is transmitted to a network in response to the degree of influence of the packet on QoE being less than or equal to the predetermined value.

A non-transitory computer-readable medium having stored thereon a computer program, which when executed by a processor of a packet transmission apparatus, causes the packet transmission apparatus to:

• determine whether a buffer occupancy is greater than or equal to a threshold value;
• extract a degree of influence of a packet on quality of experience (QoE) in response to the buffer occupancy being greater than or equal to the threshold value;
• and
• drop the packet before the packet is transmitted to a network in response to the degree of influence of the packet on QoE being less than or equal to a predetermined value.