Which of the following defines a vertical Network Slice?

A vertical network slice is an end-to-end logical network tailored to meet the specific requirements of a particular business customer or an entire industry vertical (e.g., energy, automotive, healthcare). The term "vertical" refers directly to a vertical market. The slice is defined by the customer it serves and the specific purpose or application it enables, such as providing ultra-reliable, low-latency communications for a national energy grid or a smart factory. This customer-centric model is a key business driver for 5G network slicing, allowing operators to offer customized connectivity solutions as a service to enterprises.

B: This describes the end-to-end nature of a network slice in general, which is a necessary but not a defining characteristic of a vertical slice. C: This is a broader description. While a vertical slice serves a common purpose, option A is more precise by linking it to a specific customer, which is the core concept of serving a "vertical". D: This defines a "horizontal slice," which involves partitioning resources at a single network layer (e.g., transport), not an end-to-end slice for a specific industry.

1. Nokia White Paper, "5G network slicing: A business perspective" (2020): Page 3 states, "Network slicing enables CSPs to create dedicated, logical networks for specific customers or services over a common physical infrastructure. This capability is particularly important for addressing the diverse and often stringent performance requirements of vertical industries..." This source directly supports the concept of creating dedicated networks for specific customers and verticals.

2. Nokia White Paper, "Network slicing explained" (2022): Page 4 explains, "Slicing allows an operator to create specific virtual networks on a common physical infrastructure. These virtual networks can be optimized for specific customers, services, or traffic types." This reinforces the customer-centric definition presented in the correct answer.

3. Afolabi, I., Taleb, T., Samdanis, K., Ksentini, A., & Flinck, H. (2018). "Network Slicing and Softwarization: A Survey on Principles, Enabling Technologies, and Solutions." IEEE Communications Surveys & Tutorials, 20(3), 2429-2453. In Section II.A, the paper states, "Network slicing is envisioned to support a wide range of services and vertical business... A network slice can be seen as a logical network that is tailored to the needs of a specific application, service, or a group of users (e.g., a vertical industry)." (DOI: https://doi.org/10.1109/COMST.2018.2815638)