5G PDU Session Release for QoS Capability Mismatch

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Solution Overview

Problem

In existing 5G Core networks, PDU session establishment can encounter anomalies when QoS rules and/or QoS flow descriptions configured by the network side exceed the maximum support capability of user equipment, leading to continuous occupation of network resources by anomalous PDU sessions.

Innovation Solution

A method and apparatus for handling PDU sessions, where user equipment transmits a PDU session release request to the network device if configured QoS rules, packet filters, or QoS flow descriptions exceed the user equipment's maximum support capability, allowing timely resource release and preventing network resource occupation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the network device configures QoS rules, packet filters, and QoS flow descriptions for PDU session, then the network side can manage and control the PDU session, but the configured parameters may exceed the maximum support capability of user equipment, causing PDU session establishment anomalies

Engineering Contradiction:

ImprovePDU session establishment reliabilityVSAvoidNetwork configuration adaptability to UE capability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The network device performs preliminary actions by sending a PDU session establishment accept message that includes configuration information about QoS rules, packet filters, and QoS flow descriptions before the PDU session is fully established. This allows the UE to evaluate whether these configurations exceed its maximum support capability and take appropriate action (such as releasing the PDU session) before resources are fully committed, thereby preventing establishment anomalies.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the network device continuously allocates resources for PDU session establishment, then service coverage is maintained, but anomalous PDU sessions that exceed UE capability continuously occupy network resources

Engineering Contradiction:

ImproveNetwork resource utilization efficiencyVSAvoidPDU session establishment success rate

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system implements feedback mechanisms where the network device monitors PDU session establishment outcomes and identifies anomalous sessions that exceed UE capability. When such anomalies are detected, the network device can release the PDU session and free up occupied resources. This feedback loop prevents continuous resource occupation by failed sessions and maintains healthy network resource utilization while preserving overall service coverage.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12284554B2Method and apparatus for handling protocol data unit session, and electronic device

Publication Date: 2025.04.22 KONINKLIJKE PHILIPS NV

AI summary

Embodiments of this disclosure provide a method and an apparatus for handling a protocol data unit session, and an electronic device. The method includes: transmitting a protocol data unit PDU session release request to a network device in a case that at least one of an authorized quality of service QoS rule, packet filter, and/or authorized QoS flow description configured by a network device for the PDU session exceeds a maximum support capability set by user equipment for the PDU session.