基于INT感知的5G核心网用户面流量调度系统  

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

作　　者：王超[1] 任蒙 王尚广[1] WANG Chao;REN Meng;WANG Shangguang(State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学网络与交换技术全国重点实验室,北京100876

出　　处：《通信学报》2023年第10期149-163,共15页Journal on Communications

基　　金：国家自然科学基金资助项目(No.62032003,No.U21B2016)。

摘　　要：为解决5G移动数据流量激增和新型网络应用不断涌现给网络运维造成巨大压力的问题,设计并实现一个面向5G核心网用户面的流量调度系统,包含网络状态信息感知子系统和路由决策子系统。在网络状态信息感知子系统中,传统带内网络遥测方法带宽开销高,而且不是专门为无线网络系统设计的,此外,在5G核心网中应用带内网络遥测还面临测量精度不高、QoS无法保障等挑战。为此,提出了基于带内网络遥测的5G核心网用户面状态信息感知方案,将遥测信息插入GTP-U报文的扩展头部,实时检测UPF状态信息,实现网络状态动态随路测量。路由决策子系统实现了基于改进蚁群算法的流量调度算法,利用感知到的网络状态信息升级信息素函数更新方式,完成基于实时网络状态的路由决策。实际部署测试结果表明,网络状态信息感知子系统能正常感知网络信息,而且所做路由决策在时延、吞吐量和丢包率方面优于传统路由算法。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.

关 键 词：5G核心网 用户面 流量调度 带内网络遥测 改进蚁群算法 

分 类 号：T393[一般工业技术]