Traffic scheduling system of the 5G core network user plane based on INT perception

To solve the problem of huge pressure on network operation caused by the surge of 5G mobile data traffic and the continuous emergence of new network applications, a traffic scheduling system of the 5G core network user plane was designed and implemented, including network state information perception subsystem and routing decision subsystem. In the network state information perception subsystem, traditional in-band network telemetry methods incurred high bandwidth overhead and were not specifically designed for wireless network systems. Furthermore, the application of in-band network telemetry in the 5G core network faced challenges such as low measurement accuracy and the inability to guarantee QoS. A 5G core network user plane state information perception scheme based on in-band network telemetry was proposed. The telemetry information was inserted into the extended header of GTP-U message realize the measurement of network state along the path. The routing decision subsystem implemented the traffic scheduling algorithm based on the improved ant colony algorithm. The update method of the pheromone function was promoted by the perceived status information to complete the routing decision based on the real-time network state. The deployment test results showed that the network state information perception subsystem can perceive network information normally, and the routing decisions were superior to traditional routing algorithms in terms of delay, throughput and packet loss rate. © 2023 Editorial Board of Journal on Communications. All rights reserved.