The software-defined optical network (SDON) is a revolutionary approach in the field of optical networks. The separation of the control plane and data plane in software-defined networking (SDN) provides enhanced security and simplified network administration. Nevertheless, performance and control plane scalability are significant issues in SDN. SDN performance can be evaluated using parameters such as burst loss, delay, channel occupancy, packet loss, throughput, and average response time. The number of messages exchanged between the data plane and the control plane is used as a metric to determine controller scalability. As the network load increases, the controller experiences a higher flow of messages. It causes delay and burst loss in transmitting the burst. Occasionally, bursts exceed the capacity of the fixed-sized burstifier and are discarded because it takes a long time to identify a suitable route for the burst. Hence, it is essential to minimize the volume of messages exchanged between the control plane and the data plane to improve performance and controller scalability. In this paper, we propose a scalable SDN optical network architecture that minimizes the number of messages exchanged between the data plane and the control plane. We proposed mechanisms like channel reservation, transmission cycles, and guard time between cycles to enhance both the speed and the quality of burst transmission. Prior to transmission, resources or channels are allocated to bursts to minimize the possibility of burst collision and loss. The data plane comprises an optical burst switching (OBS) network, and the flow table entries are periodically updated to minimize inter-plane communication. We perform simulations to evaluate and compare the performance of the proposed architecture with the existing state-of-the-art architecture reported in the literature. The proposed architecture performs better than the existing state-of-the-art in terms of metrics including burst loss, delay, channel occupancy, packet loss, throughput, average response time, and reduction in the number of messages exchanged between the data plane and the control plane. Experimental results indicate a 41% reduction in mean burst loss probability and a 40.5% reduction in mean burst sending delay compared to existing architectures. Additionally, 42.1% fewer messages are exchanged between the control plane and the data plane compared to the number of exchanged messages in existing architectures.

中文翻译：

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一种提高软件定义光网络性能的架构


软件定义光网络（SDON）是光网络领域的革命性方法。软件定义网络 (SDN) 中控制平面和数据平面的分离提供了增强的安全性和简化的网络管理。然而，性能和控制平面可扩展性是 SDN 中的重要问题。 SDN性能可以使用突发丢失、延迟、信道占用、丢包、吞吐量和平均响应时间等参数进行评估。数据平面和控制平面之间交换的消息数量用作确定控制器可扩展性的指标。随着网络负载的增加，控制器会经历更高的消息流。它会导致传输突发时的延迟和突发丢失。有时，突发会超出固定大小突发发生器的容量并被丢弃，因为需要很长时间才能识别适合突发的路由。因此，必须最大限度地减少控制平面和数据平面之间交换的消息量，以提高性能和控制器可扩展性。在本文中，我们提出了一种可扩展的SDN光网络架构，最大限度地减少数据平面和控制平面之间交换的消息数量。我们提出了信道预留、传输周期和周期之间的保护时间等机制，以提高突发传输的速度和质量。在传输之前，资源或信道被分配给突发以最小化突发冲突和丢失的可能性。数据平面包括光突发交换（OBS）网络，并且流表条目定期更新以最小化平面间通信。 我们进行模拟来评估和比较所提出的架构与文献中报告的现有最先进架构的性能。所提出的架构在突发丢失、延迟、信道占用、数据包丢失、吞吐量、平均响应时间以及数据平面和数据平面之间交换的消息数量减少等指标方面比现有的最先进技术表现更好。控制平面。实验结果表明，与现有架构相比，平均突发丢失概率降低了 41%，平均突发发送延迟降低了 40.5%。此外，与现有架构中交换的消息数量相比，控制平面和数据平面之间交换的消息数量减少了 42.1%。