UDR Aggregates Multi-PCF Session Traffic for Policy Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing session traffic usage monitoring function in the Policy Control Function (PCF) of 5G systems is inadequate for users who distribute PDU sessions across multiple PCFs, leading to incomplete and untimely policy control, as it cannot accurately summarize total session traffic usage across different PCFs.
Innovation Solution
A method where the User Data Repository (UDR) accumulates total session traffic usage information from multiple PCFs, allowing for real-time adjustment of traffic usage accumulation modes based on the number of active sessions, ensuring accurate and timely policy control by informing each PCF to report traffic usage increments and apply policy control when thresholds are reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the PCF monitors session traffic usage locally, then policy control can be performed in real-time for single-PCF sessions, but total traffic usage cannot be obtained when users distribute sessions across multiple PCFs
Solution Approach 1:
The patent introduces a unified session traffic usage record as an intermediary mechanism that aggregates traffic data from multiple PCFs. This record serves as a central repository that mediates between distributed PCF instances and the policy control function, enabling accurate total traffic monitoring across multi-PCF scenarios while maintaining local real-time control capabilities.
Solution Approach 2:
The patent merges session traffic usage information from multiple PCFs into a unified record. By combining traffic usage data from different PCF instances handling the same user's sessions, the system achieves comprehensive total traffic monitoring while preserving the individual PCFs' ability to perform real-time policy control for their respective sessions.
2Speed
If the PCF performs policy control based on local session traffic usage, then real-time control is achieved for single-PCF sessions, but policy control becomes untimely and incorrect for multi-PCF distributed sessions
Solution Approach 1:
The patent implements a feedback mechanism where session traffic usage information is continuously updated in a unified record accessible by all PCFs. Each PCF can query the unified record to obtain accurate total traffic usage data and threshold information, ensuring that policy control decisions are based on complete and up-to-date traffic information across all sessions, thereby maintaining both real-time response and high accuracy.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A method for monitoring and controlling session traffic usage, includes: receiving traffic usage increment information of a first session and a second session reported by a first PCF and a second PCF; accumulating a total traffic usage of the first session and the second session according to the received traffic usage increment information; determining whether a current total traffic usage reaches a threshold value of a total issued traffic usage; and sending the total traffic usage information of the first session and the second session to the first PCF and the second PCF in response to that the current total traffic usage reaches the threshold value of the total issued traffic usage, so that the first PCF and the second PCF carry out policy control according to the total traffic usage information and the respective accumulated traffic usage increment information, and in response to that the current total traffic usage does not reach the threshold value of the total issued traffic usage, repeating above steps.