One of the main goals of 5G networks is to support the technological and
business needs of various industries (the so-called verticals), which wish to
offer to their customers a wide range of services characterized by diverse
performance requirements. In this context, a critical challenge lies in mapping
in an automated manner the requirements of verticals into decisions concerning
the network infrastructure, including VNF placement, resource assignment, and
traffic routing. In this paper, we seek to make such decisions jointly,
accounting for their mutual interaction, and efficiently. To this end, we
formulate a queuing-based model and use it at the network orchestrator to
optimally match the vertical's requirements to the available system resources.
We then propose a fast and efficient solution strategy, called MaxZ, which
allows us to reduce the solution complexity. Our performance evaluation,
carried out accounting for multiple scenarios representative of real-world
services, shows that MaxZ performs substantially better than state-of-the-art
alternatives and consistently close to the optimum.

本文针对 5G 网络中面向垂直行业的服务需求挑战，提出了一个基于排队模型和名为 MaxZ 的快速高效解决策略的决策方法，并在真实场景下的评估中表现明显优于现有方案并接近最优解。

5G 网络垂直服务的 VNF 放置和资源分配

VNF Placement and Resource Allocation for the Support of Vertical  Services in 5G Networks

Service Function Chaining (SFC) is a crucial technology for future Internet.
It aims to overcome the limitation of current deployment models which is rigid
and static. Application of this technology relies on algorithms that can
optimally mapping SFC to substrate network. This category of algorithms is
referred as "Service Function Chaining Resource Allocation (SFC-RA)" algorithms
or "VNF placement (VNFP)" algorithms. This paper presents a survey of current
researches in SFC-RA algorithms. After presenting the formulation and related
problems, several variants of SFC-RA problem are summarized. At last, we
discussed several future research directions.

本文综述了当前研究的 Service Function Chaining Resource Allocation (SFC-RA) 算法，主要集中在如何优化映射 SFC 到基础网络上的方法及其相关问题，同时讨论了未来研究方向。