The combination of recent emerging technologies such as network function virtualization (NFV) and network programmability (SDN) gave birth to the novel Network Slicing paradigm. 5G networks consist of multi-tenant infrastructures capable of offering leased network “slices” to new customers (e.g., vertical industries) enabling a new telecom business model: Slice-as-a-Service (SlaaS). However, as the service demand gets increasingly dense, slice requests congestion may occur leading to undesired waiting periods. This may turn into impatient tenant behaviors that increase potential loss of the business attractiveness to customers. In this paper, we aim to: 1) study the slicing admission control problem by means of a multi-queuing system for heterogeneous tenant requests; 2) derive its statistical behavior model; 3) find out the rational strategy of impatient tenants waiting in queue-based slice admission control systems; 4) prove mathematically and empirically the benefits of allowing infrastructure providers to share its information with the upcoming tenants; and 5) provide a utility model for network slices admission optimization. Our results analyze the capability of the proposed SlaaS system to be approximately Markovian and evaluate its performance as compared to a baseline solution.

中文翻译：

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与不耐烦租户的基于多服务的网络切片编排

网络功能虚拟化 (NFV) 和网络可编程性 (SDN) 等新兴技术的结合催生了新型网络切片范式。5G 网络由多租户基础设施组成，能够向新客户（例如垂直行业）提供租用网络“切片”，从而实现新的电信业务模式：切片即服务 (SlaaS)。然而，随着服务需求变得越来越密集，切片请求可能会发生拥塞，从而导致不希望的等待时间。这可能会变成不耐烦的租户行为，从而增加对客户的业务吸引力的潜在损失。在本文中，我们的目标是：1）通过异构租户请求的多队列系统研究切片准入控制问题；2）推导出其统计行为模型；3）找出不耐烦租户在基于队列的切片准入控制系统中等待的合理策略；4) 从数学上和经验上证明允许基础设施提供商与即将到来的租户共享其信息的好处；5)提供一种用于网络切片准入优化的实用模型。我们的结果分析了所提出的 SlaaS 系统近似马尔可夫的能力，并与基线解决方案相比评估了其性能。