URSP Rule Update via Network Slice Re-mapping Validation

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently updating UE route selection policy (URSP) rules due to network slice re-mapping, often leading to invalid slice re-mapping information and unnecessary rule updates.

Innovation Solution

A method and apparatus for operating a policy control function (PCF) in a wireless communication system, which configures and provides URSP rules for protocol data unit (PDU) sessions based on network slice re-mapping. This involves obtaining slice re-mapping indication and related information from the access management function (AMF) and updating the URSP rules accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If URSP rules are updated based on slice re-mapping information, then the route selection policy is kept up-to-date, but unnecessary updates occur due to invalid re-mapping information

Engineering Contradiction:

Improvevalidity of URSP rule updatesVSAvoidtime for unnecessary URSP rule updates

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by checking the validity of slice re-mapping information before updating URSP rules. The network function verifies whether re-mapping information is valid and only triggers URSP rule updates when the information is confirmed valid, preventing unnecessary updates and optimizing network resource usage.

Inventive Principle:

Principle #10Preliminary action

2Speed

If slice re-mapping information is continuously monitored, then the URSP rules can be updated timely, but system complexity increases

Engineering Contradiction:

Improvetimeliness of URSP rule updatesVSAvoidcomplexity of monitoring mechanism

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where network functions receive slice re-mapping information, verify its validity, and trigger URSP rule updates only when changes are confirmed. This feedback-based approach ensures timely updates while avoiding unnecessary processing by continuously monitoring re-mapping information validity.

Inventive Principle:

Principle #23Feedback

3Reliability

If URSP rule updates are performed frequently, then the route selection remains optimal, but network overhead increases

Engineering Contradiction:

Improveoptimality of route selectionVSAvoidnetwork overhead for rule updates

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent extracts and verifies the validity of slice re-mapping information before triggering URSP rule updates. By separating the validation step from the update process, the system ensures that only valid re-mapping events lead to rule updates, reducing unnecessary network overhead while maintaining optimal route selection.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4568352A1URSP rule update method and apparatus based on network slice re-mapping in wireless communication system

Publication Date: 2025.06.11 LG ELECTRONICS INC

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AI summary

The present disclosure relates to a method for operating a PCF in a wireless communication system, and the method may comprise configuring and providing a URSP rule for a PDU session, which is established based on a first network slice, to a terminal, based on a network slice associated with the PDU session being re-mapped from the first network slice to a second network slice based on an unavailability cause for the first network slice, obtaining slice re-mapping indication information and slice re-mapping-related information from an AMF, and updating the URSP rule based on the slice re-mapping-related information and providing the updated URSP rule to the terminal.