PS Data Off Management Across 3GPP and Non-3GPP PDU Sessions

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Solution Overview

Problem

Existing 3GPP PS Data Off methods for Packet Data Unit (PDU) sessions associated with non-3GPP access lack efficient communication support.

Innovation Solution

A method for a UE and network node to manage PS Data Off by sending/receiving PDU session establishment requests and determining the application of PS Data Off based on last report information and access type, using processors and memory to execute instructions for establishing PDU sessions with 3GPP or non-3GPP access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If 3GPP PS Data Off is used for PDU session associated with non-3GPP access, then power consumption is reduced, but communication efficiency deteriorates due to lack of efficient communication support

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication efficiency

Core Design Contradiction:

Use of energy by moving objectVSProductivity

Solution Approach 1:

The network node determines the PS Data Off applicability in advance based on last report information and access type before actual data transmission. This preliminary determination allows the system to pre-configure the appropriate communication mode, ensuring both power savings and communication efficiency are optimized before the actual data flow begins.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically selects between PS Data Off mode and normal communication mode based on real-time conditions (last report information and access type). This dynamic adaptation allows the communication system to switch between power-saving mode and high-efficiency mode according to the specific scenario, resolving the contradiction between power consumption and communication efficiency.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If PS Data Off is applied to PDU session, then data transmission is stopped to save power, but communication flexibility is reduced

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication flexibility

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The system changes the operational parameters of the PDU session based on the determined PS Data Off applicability. When PS Data Off is determined to be applicable, the system transitions to a power-saving parameter state; when not applicable, it maintains normal communication parameters. This parameter switching enables flexible adaptation between power-saving and communication-performance modes.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12408226B2Communication related to PS data off

Publication Date: 2025.09.02 LG ELECTRONICS INC

AI summary

One disclosure of the present specification provides a method in which a UE performs communication related to PS Data Off. The method may comprise: a step for transmitting a first PDU session establishment request message in order to establish a PDU session associated with non-3GPP access or 3GPP access; and a step for transmitting a second PDU session establishment request message in order to perform a handover between the non-3GPP access and the 3GPP access for the PDU.