QuicSDN：将SDN中南向通信从TCP过渡到QUIC
QuicSDN: Transitioning from TCP to QUIC for Southbound Communication in SDNs
AI总结：
本文提出quicSDN架构，用QUIC替代TCP实现SDN南向通信，通过分析与实验证明其能显著降低开销并提升性能。
摘要：
在软件定义网络（SDN）中，控制平面与数据平面之间出于多种目的进行通信，例如下发配置和收集统计数据。虽然已有多种方法被提出以降低SDN的开销并增强其可扩展性，但用于南向通信的传输层协议所带来的影响尚未得到研究。现有SDN依赖TCP（及TLS）来保证可靠性和安全性。在本文中，我们表明TCP的使用对南向通信造成了相当大的开销，识别了这种开销的成因，并展示了用QUIC替代TCP如何能够提升该通信的性能。我们引入了quicSDN架构，使SDN中的南向通信能够通过QUIC协议进行。我们提出了一个基于SDN社区最常用标准协议的参考架构，并展示了如何对控制器和交换机进行改造以促成这一过渡。我们从分析和实验两个角度比较了quicSDN与传统SDN架构的性能，并证实了quicSDN的优越性能。
英文摘要：
In Software-Defined Networks (SDNs), the control plane and data plane communicate for various purposes, such as applying configurations and collecting statistical data. While various methods have been proposed to reduce the overhead and enhance the scalability of SDNs, the impact of the transport layer protocol used for southbound communication has not been investigated. Existing SDNs rely on TCP (and TLS) to enforce reliability and security. In this paper, we show that the use of TCP imposes a considerable overhead on southbound communication, identify the causes of this overhead, and demonstrate how replacing TCP with QUIC can enhance the performance of this communication. We introduce the quicSDN architecture, enabling southbound communication in SDNs via the QUIC protocol. We present a reference architecture based on the standard, most widely used protocols by the SDN community and show how the controller and switch are revamped to facilitate this transition. We compare, both analytically and empirically, the performance of quicSDN versus the traditional SDN architecture and confirm the superior performance of quicSDN.
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