A Traffic Engineering Technology Based on Segment Routing in SDN

In recent years, the network urgently needs a lot of bandwidth resources to meet the explosive growth of traffic demands. Network operators are also constantly speeding up the routing ports and expanding the link bandwidth, but the network resource utilization rate is still very low, so through traffic engineering technology to optimize the utilization of network resources is of great significance. Therefore, focusing on the traffic engineering technology based on segment routing in Software-Defined Networking, we propose the SRTE-L model, and a traffic scheduling scheme. We propose to set a path decision variable L and a path constraint to limit the length of SR path and the number of intermediate nodes, thereby minimizing the maximum link utilization and reducing computation time, and we investigate the trade-off between link utilization and computation time. Finally, the difference between the proposed method and the existing methods in terms of computation time and maximum link utilization is compared. Through extensive simulations,we indeed experimentally show that our method can reduce the computation time while retaining comparable maximum link utilization.