The acronym “USSP” in the context of ZTE’s UDM (Unified Data Management) solution stands for Unified Subscriber Service Platform. This platform is part of ZTE’s suite of products designed to manage subscriber data and services in a unified manner across 4G and 5G networks. The USSP plays a crucial role in the 5G Core Network (5GC) by providing a centralized point for user data management, which includes authentication, authorization, and accounting functionalities. It ensures seamless service continuity and supports the implementation of network slicing, a key feature of 5G architecture that allows for the creation of multiple virtual networks on top of a common physical infrastructure.