With the growing demand for data connectivity, network service providers are faced with the task of reducing their capital and operational expenses while simultaneously improving network performance and addressing the increased connectivity demand. Although Network Function Virtualization (NFV) has been identified as a solution, several challenges must be addressed to ensure its feasibility. In this paper, we address the Virtual Network Function (VNF) placement problem by developing a machine learning decision tree model that learns from the effective placement of the various VNF instances forming a Service Function Chain (SFC). The model takes several performance-related features from the network as an input and selects the placement of the various VNF instances on network servers with the objective of minimizing the delay between dependent VNF instances. The benefits of using machine learning are realized by moving away from a complex mathematical modelling of the system and towards a data-based understanding of the system. Using the Evolved Packet Core (EPC) as a use case, we evaluate our model on different data center networks and compare it to the BACON algorithm in terms of the delay between interconnected components and the total delay across the SFC. Furthermore, a time complexity analysis is performed to show the effectiveness of the model in NFV applications.



机器学习(Machine Learning)是一个研究计算学习方法的国际论坛。该杂志发表文章,报告广泛的学习方法应用于各种学习问题的实质性结果。该杂志的特色论文描述研究的问题和方法,应用研究和研究方法的问题。有关学习问题或方法的论文通过实证研究、理论分析或与心理现象的比较提供了坚实的支持。应用论文展示了如何应用学习方法来解决重要的应用问题。研究方法论文改进了机器学习的研究方法。所有的论文都以其他研究人员可以验证或复制的方式描述了支持证据。论文还详细说明了学习的组成部分,并讨论了关于知识表示和性能任务的假设。 官网地址:http://dblp.uni-trier.de/db/journals/ml/