5G Core Network Slicing for Wireless Application Triggering

The patent segments the 5G core network into distinct functional units (AMF, SMF, UPF) that can be independently deployed and managed. Each network slice is created as a separate virtualized instance with dedicated resources, allowing flexible service deployment without redesigning the entire network architecture. This modular segmentation resolves the contradiction by enabling service flexibility through isolated slices while managing complexity through standardized functional components.

The patent implements universal network functions that can serve multiple purposes across different network slices. The AMF handles authentication and mobility management for all slices, the SMF manages session establishment universally, and the UPF provides user plane routing for diverse services. This multi-functionality approach allows the same core network infrastructure to support varied services (eMBB, URLLC, mMTC) simultaneously, improving service flexibility while avoiding the need for separate dedicated systems for each service type.

The patent implements a nested architecture where virtualized network functions (VNFs) are nested within network slice instances, which are in turn nested within the overall 5G core network infrastructure. Each network slice contains its own set of virtualized AMF, SMF, and UPF instances that are logically isolated but physically share the underlying hardware. This nesting enables service customization through isolated virtual instances while managing network complexity through hierarchical organization and resource virtualization.

The patent introduces the Network Slice Selection Function (NSSF) as an intermediary that manages network slice instantiation and selection. The NSSF acts as a mediator between service requests and the underlying network resources, automatically selecting appropriate slice instances based on service requirements. This intermediary approach enables service customization through automated slice selection while reducing network complexity by centralizing slice management functions and providing a standardized interface for service deployment.

The patent implements preliminary registration procedures where the UE performs registration and authentication with the AMF before actual service data transmission begins. The registration process pre-establishes security contexts, mobility management parameters, and session management references. This preliminary action ensures service reliability by validating the UE's credentials and establishing management contexts in advance, while the standardized registration流程 reduces signaling overhead compared to establishing connections ad-hoc for each service transaction.

The patent implements feedback mechanisms in the connection management process where the AMF provides registration acceptance messages containing authorized service parameters, and the SMF provides session establishment confirmations with allocated resource parameters. These feedback messages enable the UE to adjust its data transmission parameters accordingly, ensuring reliable service delivery. The structured feedback approach improves service reliability through explicit confirmation of authorized operations while minimizing redundant signaling by providing comprehensive information in each feedback message.