Network slicing has emerged as a key network technology, providing network operators with the means to offer virtual networks to vertical users over a single physical network infrastructure. Recent research has resulted mainly in techniques for managing and deploying network slices, but the implementation of network slices on a real physical transport network infrastructure has received much less attention. Standardization bodies, such as the Internet Engineering Task Force (IETF), have provided some implementation recommendations. Still, there is a lack of mechanisms to implement network slices capable of handling traffic bursts while simultaneously meeting the Quality of Service (QoS) requirements of the traffic flows associated with the slices. In this paper, we propose a novel fine-grained resource control mechanism to implement transport network slices that meet traffic QoS requirements while both accepting limited traffic bursts, and enabling efficient bandwidth sharing within and across slices. The mechanism is executed at the edge of the transport network. The proposed model aligns with current standards on network slicing and has been tested on an experimental platform. Using this platform, we have conducted an extensive experimental campaign that demonstrates that our proposal can effectively control traffic bursts generated within the network slices while maximizing bandwidth utilization across the network.

翻译：网络切片已成为一项关键网络技术，为网络运营商提供了在单一物理网络基础设施上向垂直用户提供虚拟网络的手段。现有研究主要集中于网络切片的管理与部署技术，但在真实物理传输网络基础设施上实现网络切片的研究仍较为缺乏。虽然互联网工程任务组（IETF）等标准化组织已提出若干实施建议，但目前仍缺乏能够同时处理流量突发并满足切片关联业务流服务质量（QoS）要求的网络切片实现机制。本文提出一种新颖的细粒度资源控制机制，用于实现既能满足流量QoS要求、又能接纳有限流量突发，同时支持切片内外高效带宽共享的传输网络切片。该机制在传输网络边缘执行，所提模型符合当前网络切片标准规范，并已在实验平台上完成验证。通过该平台开展的广泛实验表明，我们的方案能有效控制网络切片内部产生的流量突发，同时实现全网带宽利用率的最大化。