Describe the functions of the Network Slice Template Part (NSTP) in the 5G Core network.
Network slicing is a fundamental concept in 5G technology that enables the creation of logically isolated and independent networks within a common physical infrastructure. Each network slice is designed to meet specific requirements for different use cases, applications, or services. These slices are defined based on various parameters such as bandwidth, latency, reliability, and security.
In a 5G Core network, the network slicing functionality involves several components, including the Network Slice Selection Function (NSSF), the Network Slice Instance (NSI), and the Network Slice Subnet (NSS). Here's a breakdown of their functions:
- Network Slice Selection Function (NSSF):
- The NSSF is responsible for selecting the appropriate network slice instance for a given service request.
- It considers factors such as the quality of service (QoS) requirements, user-specific criteria, and network policies to determine the suitable network slice.
- Network Slice Instance (NSI):
- Once the NSSF has selected a specific network slice, an instance of that slice, known as the Network Slice Instance (NSI), is created.
- The NSI represents a unique instantiation of a network slice with specific characteristics and parameters.
- Network Slice Subnet (NSS):
- A Network Slice Subnet (NSS) is a subset of the overall network slice, focusing on a specific part of the infrastructure.
- It could include elements such as the Access and Mobility Management Function (AMF), Session Management Function (SMF), and User Plane Function (UPF), among others.