Ensuring end-to-end Quality of Services (QoS) is a challenging aspect in traditional network architectures. Software-Defined Network (SDN), as the new norm of the network, has ascended in response to a traditional network’s limitations. SDN’s benefits are its ability to provide a global networking view, programmability, decouple the data plane with the control plane. Integrating SDN architecture with Service-Oriented Architecture (SOA) paradigm brings a novel network-based notion for service delivery. However, it also introduces new challenges for maintaining the QoS in these networks. Researchers from both academia and industry have proposed and developed several resolutions for QoS management in SDNs. However, gaps still exist in developing and applying such resolutions for QoS management in SOA-based SDNs. This review paper aims to identify these gaps by representing a sketch of the effectiveness of the existing QoS management techniques in SOA-based SDNs. We first identify the four different requirements that QoS management techniques need to meet to be applied in SOA-based SDNs. We then categorize the relevant QoS management approaches into five main categories of QoS based controller design, Resource allocation-based approach, Queue scheduling and management-based approach, QoS-driven optimal routing, and Service Level Agreement (SLA) based quality management in SDN. We then compare the working of techniques in each category against the identified requirements for guaranteeing end-to-end QoS provisioning in SOA based SDN architecture and present directions for future research.

在传统网络体系结构中，确保端到端服务质量（QoS）是一个具有挑战性的方面。作为网络的新规范，软件定义网络（SDN）响应传统网络的局限性而上升。SDN的优势在于它具有提供全局网络视图，可编程性，将数据平面与控制平面分离的能力。SDN架构与面向服务的架构（SOA）范式的集成带来了一种新颖的基于网络的服务交付概念。但是，这也为在这些网络中维持QoS提出了新的挑战。来自学术界和行业的研究人员已经提出并开发了几种用于SDN中QoS管理的解决方案。但是，在基于SOA的SDN中为QoS管理开发和应用此类解决方案时，仍然存在差距。本文旨在通过概述基于SOA的SDN中现有QoS管理技术有效性的草图来找出这些差距。我们首先确定要在基于SOA的SDN中应用QoS管理技术需要满足的四个不同要求。然后，我们将相关的QoS管理方法分为以下五个主要类别：SDN中基于QoS的控制器设计，基于资源分配的方法，基于队列调度和管理的方法，QoS驱动的最佳路由以及基于服务水平协议（SLA）的质量管理。然后，我们将每种类别的技术工作与已确定的需求进行比较，以确保在基于SOA的SDN架构中提供端到端QoS的需求，并提出未来研究的方向。