AMF Content Filtering for 5G Standalone Network Latency
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Solution Overview
Problem
The existing Policy and Charging Rules Function (PCRF) in 4G networks limits the potential of 5G infrastructure, as it relies on hardware-based solutions that are not fully optimized for real-time content filtering in a 5G standalone infrastructure.
Innovation Solution
Implementing content filtering in the access and mobility management function (AMF) or mobility management entity (MME) unit within the 5G standalone infrastructure, allowing for software-based configuration and decoupling of user plane and control plane functions to enhance content filtering capabilities without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If content filtering is implemented in the PCRF section using hardware-based solutions, then content filtering capability is provided, but device complexity and hardware dependency increase
Solution Approach 1:
The patent replaces the hardware-based PCRF mechanism with a software-based content filtering mechanism implemented in the AMF or MME units. The filtering logic is transformed from hardware implementation to software execution, eliminating the need for specialized hardware while maintaining filtering functionality. The AMF/MME units execute filtering rules through software processes, substituting mechanical/hardware systems with software-based systems.
Solution Approach 2:
The patent makes the AMF or MME units perform multiple functions: they continue to handle access and mobility management while simultaneously performing content filtering operations. This multi-functionality eliminates the need for dedicated hardware filtering devices, as the existing control plane units are enhanced to provide both traditional functions and content filtering capabilities through software configuration.
2Stability of the object's composition
If content filtering is performed at the PGW/PCRF interface, then centralized control is maintained, but network latency increases due to additional processing steps
Solution Approach 1:
The patent merges the content filtering function with the access and mobility management functions in the AMF or MME units. By combining these functions in a single control plane unit, the patent eliminates the need for separate filtering processing steps at the PGW/PCRF interface. The filtering decisions are made concurrently with mobility management decisions, reducing overall processing time and network latency while maintaining centralized control through the core network's AMF/MME.
3Speed
If hardware-based PCRF solutions are used, then real-time policy control is achieved, but adaptability to 5G standalone infrastructure is limited
Solution Approach 1:
The patent introduces dynamic, software-configurable filtering rules that can be easily adapted to different 5G standalone infrastructure requirements. Unlike fixed hardware-based PCRF solutions, the software implementation allows for flexible configuration and modification of filtering policies to match varying 5G network conditions, service requirements, and infrastructure capabilities, thereby achieving both real-time control and high adaptability.
Data Source
AI summary
A method and system for content filtering. A network repository function unit registers a session management function unit. The session management function unit initiates a session in response to a session request from a user equipment. The session management function unit accesses a subscriber profile stored by a data management unit, and the subscriber profile includes one or more content filtering settings. In response to the session being established, the session management function unit is configured to determine data packets for the user equipment to be filtered based on the one or more content filtering settings. Absent triggering an instruction to be sent via a Gx interface, an access and mobility management function (AMF) unit is configured to select the session management function unit in compliance with the one or more content filtering settings for filtering the data packets for the user equipment.