UE URSP Path Reporting for Mobility-Driven PDU Session Correction
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Solution Overview
Problem
Existing wireless communication systems lack a method for a user equipment (UE) to effectively report and correct changes in application associations to packet data unit (PDU) sessions due to mobility issues, necessitating improved UE routing selection policy (URSP) rule enforcement.
Innovation Solution
A method and apparatus for a UE to determine changes in application associations based on URSP re-evaluation, reporting URSP rules to a session management function (SMF) using PDU session modification or establishment requests, enabling dynamic network slicing and path correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE continuously monitors and reports application associations to PDU sessions, then the network slicing accuracy and path correctness are improved, but the signaling overhead and network load increase
Solution Approach 1:
The network pre-configures URSP rules with reporting conditions and thresholds before UE mobility operations. The UE evaluates these pre-set rules locally to determine when reporting is necessary, avoiding continuous reporting while maintaining path accuracy.
Solution Approach 2:
The system implements event-triggered feedback where the UE reports application association changes only when specific conditions are met (e.g., path deviation detected, service quality degradation). This feedback mechanism ensures accurate path monitoring while minimizing unnecessary signaling.
2Reliability
If the UE performs frequent URSP rule re-evaluations to correct path deviations, then the service continuity and path accuracy are improved, but the processing complexity and power consumption increase
Solution Approach 1:
The UE autonomously performs URSP rule re-evaluation based on locally available information such as serving cell changes, signal quality metrics, and application behavior patterns. This self-service approach enables the UE to detect and correct path deviations without continuous network intervention, maintaining service continuity while reducing processing overhead.
Solution Approach 2:
The system dynamically adjusts re-evaluation parameters such as monitoring thresholds, evaluation intervals, and trigger conditions based on service requirements, mobility patterns, and network state. This adaptive parameter adjustment optimizes the balance between service continuity and processing complexity.
3Stability of the object's composition
If the network implements centralized path management and correction, then the path selection consistency is improved, but the response time to mobility changes increases
Solution Approach 1:
The system implements distributed path management where the UE performs local URSP rule re-evaluation and path correction decisions based on local mobility conditions. The network provides centralized URSP rule configuration and validation, but the actual path adaptation occurs locally at the UE, ensuring both consistency and rapid response to mobility changes.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method of a terminal in a wireless communication system includes determining whether the UE changes an association of an application to a packet data unit (PDU) Session based on an UE routing selection policy (URSP) re-evaluation, reporting information about a URSP rule matched to the application to a Session Management Function (SMF) using a PDU session modification request message based on the UE associating the application to an existing PDU Session based on the URSP re-evaluation, and reporting information about a URSP rule matched to the application to the SMF using a PDU session establishment request message based on the UE associating the application to a new PDU Session based on the URSP re-evaluation.