The Next-Generation Core (NGC) in 5G introduces a concept called the Network Slice Selection Assistance Information (NSSAI), which plays a pivotal role in tailoring network services to meet the diverse requirements of different applications and users.
In essence, NSSAI is a set of parameters that define the characteristics and capabilities of a particular network slice. A network slice, in the context of 5G, represents a logical network instance customized to deliver specific functionalities and performance metrics. These slices enable the simultaneous support of varied services, such as enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and ultra-reliable low-latency communication (URLLC), within the same physical infrastructure.
NSSAI encompasses several key elements, including the Slice Differentiator, which distinguishes one slice from another, and the Service Type Indicator, specifying the type of service the slice is optimized for. Additionally, the NSSAI includes the Single Radio Access Technology (SRAT), indicating the radio access technology associated with the slice.
This granular definition provided by NSSAI allows network operators to create and manage slices tailored to specific use cases, ensuring efficient resource allocation and optimal network performance. It facilitates the dynamic configuration and adaptation of network slices, promoting flexibility and responsiveness to varying service demands.
In summary, NSSAI is a critical component in 5G networks, providing the necessary information to orchestrate and customize network slices, thus enabling the delivery of diverse and specialized services to meet the evolving needs of both consumers and industries.