NWDAF Policy Violation Detection in 5G Wireless Systems
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Solution Overview
Problem
There is a need for effective methods to monitor and control policy violations by terminals in wireless communication systems, especially as 5G and beyond systems are expected to handle increasingly complex services and a large number of connected devices.
Innovation Solution
The proposed solution involves a method performed by a network data collection and analysis function (NWDAF) that receives user equipment (UE) route selection policy (URSP) information from a policy control function (PCF), requests session and traffic information, and analyzes this data to identify policy violations. The NWDAF then controls communication sessions to enforce policy compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network monitors and controls policy violations by terminals, then network integrity and service quality are maintained, but the complexity of the system increases due to additional monitoring and analysis functions
Solution Approach 1:
The patent introduces a Network Data Collection and Analysis Function (NWDAF) as an intermediary entity that collects, analyzes, and processes terminal data. This mediator handles the complex monitoring and analysis tasks, separating them from the core policy control function. The NWDAF receives data from multiple sources including Policy Control Functions (PCF), Session Management Functions (SMF), and User Plane Functions (UPF), performs comprehensive analysis, and provides results back to relevant network functions, thereby maintaining network integrity without significantly increasing the complexity of individual network elements.
2Measurement precision
If the network collects and analyzes detailed traffic information for each application, then policy violation detection precision is improved, but the quantity of data to be processed increases
Solution Approach 1:
The patent segments the data collection and analysis process into distinct functional components. The NWDAF divides data collection into multiple sources (PCF, SMF, UPF, AF) and segments analysis into different dimensions (URSP policy compliance, application-level traffic analysis, session information verification). This segmentation allows the system to process large quantities of data efficiently by handling different data types and analysis tasks through specialized sub-functions, thereby maintaining high detection precision without being overwhelmed by data volume.
Solution Approach 2:
The NWDAF is designed as a universal data collection and analysis platform that serves multiple functions: collecting URSP policy information, analyzing application-level traffic, verifying session compliance, and providing insights to various network functions. This multi-functional design allows the system to process diverse data types (policy data, traffic information, session details) through a single unified platform, improving detection precision across multiple policy aspects without proportionally increasing overall system complexity.
Data Source
AI summary
The present disclosure relates to a 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data transmission rate than a 4th generation (4G) communication system such as long-term evolution (LTE). A method performed by a network data collection and analysis function (NWDAF) in a wireless communication system may comprise the steps of: receiving, from a policy control function (PCF), user equipment (UE) route selection policy (URSP) information relating to a UE policy to be applied to a UE; requesting session information that is being used by the UE, on the basis of the URSP information; requesting a report on traffic information for each application used by the UE on the basis of the URSP and the session information; and receiving the traffic information for each application from the UE.