一种低时延虚拟网络功能映射及调度优化算法

刘光远; 曹晶仪; 庞紫园; 黄书翠

doi:10.7652/xjtuxb202302013

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一种低时延虚拟网络功能映射及调度优化算法

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- 一种低时延虚拟网络功能映射及调度优化算法
- An Optimized Algorithm with Low Latency for Virtual Network Function Mapping and Scheduling
- 西安交通大学学报 2023年57卷第2期页码：121-130
- 作者机构：
  
  1. 石家庄铁道大学信息科学与技术学院,石家庄,050043
  2. 河北省电磁环境效应与信息处理重点实验室,石家庄,050043
- 作者简介：
  
  : 2022-06-20。作者简介: 刘光远(1981—),男,副教授。基金项目: 国家自然科学基金资助项目(62106157)
- 基金信息：
  
  : 2022-06-20。作者简介: 刘光远(1981—),男,副教授。基金项目: 国家自然科学基金资助项目(62106157);国家重点研发计划资助项目(2018YFB1701403);河北省自然科学基金资助项目(F2017210118)。
- DOI：10.7652/xjtuxb202302013
  中图分类号： TP393.01
- 网络首发：2023-02-10，
  
  纸质出版：2023
- 稿件说明：
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刘光远, 曹晶仪, 庞紫园, 等. 一种低时延虚拟网络功能映射及调度优化算法[J]. 西安交通大学学报, 2023,57(2):121-130.

LIU Guangyuan, CAO Jingyi, PANG Ziyuan, et al. An Optimized Algorithm with Low Latency for Virtual Network Function Mapping and Scheduling[J]. 2023, 57(2): 121-130.
刘光远, 曹晶仪, 庞紫园, 等. 一种低时延虚拟网络功能映射及调度优化算法[J]. 西安交通大学学报, 2023,57(2):121-130. DOI： 10.7652/xjtuxb202302013.

LIU Guangyuan, CAO Jingyi, PANG Ziyuan, et al. An Optimized Algorithm with Low Latency for Virtual Network Function Mapping and Scheduling[J]. 2023, 57(2): 121-130. DOI： 10.7652/xjtuxb202302013.

摘要

针对传统虚拟网络功能映射及调度服务时间长、不稳定的问题

提出了一种新的虚拟网络功能映射及调度优化算法。以虚拟网络功能链路传输时延与实例化时延整体最小化为目标

建立虚拟网络功能映射及调度模型

通过设计一种低时延映射及调度算法(GABL)

根据虚拟网络功能与虚拟机之间的映射集合

优化虚拟网络功能映射节点的选择问题及调度顺序问题

求解出最短时间的网络功能虚拟化映射及调度方案。GABL算法采用两段式初始化技术

将虚拟网络功能和虚拟机分别进行初始化

提高初始解的质量; 利用具有锦标赛策略的人工蜂群算法对问题进行求解

保留优秀基因与种群多样性

避免陷入局部最优; 采用局部搜索算法在可行解附近进行寻优

加快求最优解的速度。仿真实验结果表明:GABL算法具有稳定性强、收敛性快等特点

能够有效降低虚拟网络功能映射及调度服务时间; 与GATS算法相比

GABL算法的服务完成时间减少了15%。

Abstract

Traditional virtual network function mapping and scheduling services are usually time-consuming and unstable. To address this problem

an optimized new algorithm for virtual network function mapping and scheduling is proposed. Firstly

a virtual network function mapping and scheduling model is established to minimize the transmission latency and instantiation latency of virtual network function links as a whole. Then

a low-latency mapping and scheduling algorithm GABL

is designed. According to the mapping set between virtual network functions and virtual machines

the selection of virtual network function mapping nodes and scheduling sequence are optimized

and the virtual network function mapping and scheduling scheme with the least time consumption is concluded. GABL algorithm uses two-stage initialization technology to initialize virtual network functions and virtual machines separately to improve the quality of the initial solution. The artificial bee swarm algorithm with championship strategy is used to solve the problem

preserving excellent gene and population diversity

and avoiding local optimum. Local search algorithm is adopted to search for optimization near the feasible solution

thus speeding up the location of optimal solution. The simulation results show that the GABL algorithm has good stability and fast convergence

and effectively reduces the time of virtual network function mapping and scheduling service. The service completion time of GABL algorithm is reduced by 15% compared with GATS algorithm.

关键词

Keywords

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