Takagi Shiori, Arakawa Shin'ichi, Murata Masayuki
Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka, Japan.
Sci Rep. 2023 Jul 19;13(1):11644. doi: 10.1038/s41598-023-38695-5.
In recent years, many new network-oriented services have emerged, and such services will need to be virtualized in the multi-access edge computing environment, which is currently being standardized along with fifth-generation network technology. The environment surrounding the service functions network changes over time, such as breaking changes of APIs, and these changes impact the services. The service design should be adaptable to user requirements and environmental changes for accommodating a large number of services at low cost. In addition, it is required not only to assume environmental changes when initially designing the service functions network, but also to enable the network to continue to change its structure to adapt to new environmental changes in the future. In this paper, we propose a method to evolve the entire network of service functions based on a core/periphery structure. The advantage of the core/periphery structure is that it helps reduce the costs for maintaining or changing services by dividing the service functions into core and periphery functions. We propose a method to evolve a service functions network based on this core/periphery structure. Our method evolves the structure of the service functions network at low cost by keeping the core and peripheral functions at the appropriate scale. In addition, our proposed method accommodates almost 100% of randomly generated service chains, and holds their length to less than twice the minimum chain length. Our simulation results reveal that the structure of the service functions networks can continue to evolve at a low cost and maintain a high service accommodation ratio.
近年来，许多面向网络的新服务不断涌现，这些服务需要在多接入边缘计算环境中进行虚拟化，目前该环境正与第五代网络技术一起进行标准化。服务功能网络所面临的环境会随时间变化，例如应用程序编程接口（API）的重大变化，而这些变化会对服务产生影响。服务设计应适应用户需求和环境变化，以便以低成本容纳大量服务。此外，不仅在最初设计服务功能网络时要考虑环境变化，还需使网络能够持续改变其结构，以适应未来新的环境变化。在本文中，我们提出了一种基于核心/边缘结构来演进服务功能全网络的方法。核心/边缘结构的优势在于，通过将服务功能划分为核心功能和边缘功能，有助于降低维护或更改服务的成本。我们提出了一种基于这种核心/边缘结构来演进服务功能网络的方法。我们的方法通过将核心功能和边缘功能保持在适当规模，以低成本演进服务功能网络的结构。此外，我们提出的方法几乎能容纳100%随机生成的服务链，并将其长度保持在最小链长的两倍以内。我们的仿真结果表明，服务功能网络的结构能够以低成本持续演进，并保持较高的服务容纳率。
