Virtual network embedding (VNE) is an crucial part of network virtualization (NV), which aims to map the virtual networks (VNs) to a shared substrate network (SN). With the emergence of various delay-sensitive applications, how to improve the delay performance of the system has become a hot topic in academic circles. Based on extensive research, we proposed a multi-domain virtual network embedding algorithm based on delay prediction (DP-VNE). Firstly, the candidate physical nodes are selected by estimating the delay of virtual requests, then particle swarm optimization (PSO) algorithm is used to optimize the mapping process, so as to reduce the delay of the system. The simulation results show that compared with the other three advanced algorithms, the proposed algorithm can significantly reduce the system delay while keeping other indicators unaffected.

本文提出了一种基于延迟预测的多域虚拟网络嵌入算法 (DP-VNE)。通过预估虚拟请求的延迟，选取候选物理节点，然后使用粒子群优化算法来优化映射过程，从而降低系统延迟。仿真结果表明，相比其他三种高级算法，本文提出的算法能够显著降低系统延迟同时保持其他指标不受影响。

具有延迟预测的多域虚拟网络嵌入算法