Direct Device SBI Access for Secure 5G Core Network Mobility
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Solution Overview
Problem
Existing 3GPP systems face limitations in accessing and managing mobility within 5G mobile networks, necessitating the development of architectures that improve or replace the Access and Mobility Management Function (AMF) to meet future communication demands.
Innovation Solution
Implementing direct device service-based interface (SBI) access to the core network, enabling communication between wireless transmit receive units (WTRUs) through system-level procedures for SBI WTRU communication establishment, radio access network node discovery, and secure communication via an SBI gateway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct device service-based interface access to core network is implemented, then communication efficiency and mobility management are improved, but system complexity and security requirements increase
Solution Approach 1:
The patent introduces an SBI gateway as an intermediary component that mediates between WTRUs and core network elements. This gateway handles the complexity of direct SBI access by providing a standardized interface and translation layer, allowing efficient device-to-network communication while managing system complexity centrally rather than at each device endpoint.
Solution Approach 2:
The patent segments the core network access functionality into modular components: WTRUs, RAN nodes, SBI gateway, and core network elements. This segmentation allows each component to be optimized independently for its specific function while maintaining overall system efficiency, addressing the productivity improvement while distributing complexity across manageable modules.
2Productivity
If direct WTRU access to core network elements is enabled, then mobility management is improved, but security risks increase
Solution Approach 1:
The SBI gateway serves as a security intermediary that all WTRU-to-core-network communications must pass through. It implements security policies, authentication, and authorization centrally, enabling improved mobility management through direct access while mitigating security risks by maintaining a controlled security perimeter at the gateway layer.
Solution Approach 2:
The patent applies different security measures at different locations in the architecture: the SBI gateway implements centralized security policies and authentication, while individual WTRU-to-gateway connections can use appropriate security mechanisms. This localized security approach enables efficient mobility management while addressing security risks at the appropriate architectural layer.
3Adaptability or versatility
If service-based interface communication is implemented between WTRUs and network elements, then network flexibility and adaptability are improved, but protocol complexity increases
Solution Approach 1:
The patent implements a universal SBI framework that can accommodate multiple network elements (AMF, SMF, UPF, NRF, PCF, NEF) and various service types through a common service-based interface paradigm. This universality provides network flexibility and adaptability while reducing protocol complexity by using standardized service operation models across different network functions rather than implementing function-specific protocols.
Data Source
AI summary
One or more systems, devices, and/or methods for direct device service-based interface (SBI) access to a core network, or its equivalent, are described herein. For example, SBI communication may be used to facilitate communication with one or more network elements between one or more wireless transmit receive units (WTRU). This communication may include all aspects of a device to network communication, such as system level procedure(s) for SBI WTRU communication establishment, radio access network (RAN) node discovery and selection procedure for SBI WTRU access, SBI WTRU connection establishment with no SBI WTRU RAN security, SBI WTRU connection establishment with SBI WTRU RAN security, SBI WTRU connection establishment with SBI WTRU RAN security and key infrastructure assistance, and/or SBI higher-layer secure SBI communication via an SBI gateway.