Protocol Data Unit Session Validity Enforcement for Background Data Transfer

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Solution Overview

Problem

Wireless communication networks face challenges in monitoring and enforcing validity conditions for data connections, particularly for background data transfer sessions, where it is unclear how to ensure that protocol data unit sessions are established and maintained within specified locations and time windows.

Innovation Solution

The system determines validity information for protocol data unit sessions and initiates the release of these sessions if the conditions are not met, using policy and charging control rules to manage and enforce validity conditions, ensuring that sessions are only active within allowed time windows and locations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If background data transfer sessions are allowed to operate without strict validity monitoring, then data transfer flexibility and user convenience are improved, but network resource waste and loss of control over session validity occur

Engineering Contradiction:

Improvedata transfer flexibilityVSAvoidnetwork resource waste

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The system implements feedback mechanisms where the network entity receives status information about whether the UE satisfies validity conditions (location, time window) and adjusts session state accordingly. This closed-loop control enables automatic session release when conditions are not met, preventing resource waste while maintaining operational flexibility during valid periods.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The network proactively releases sessions before they become invalid by monitoring validity conditions in advance. When the system detects that a UE is approaching invalidity (e.g., leaving service area, time window about to expire), it initiates session release preemptively, avoiding the need for reactive cleanup and reducing resource waste from orphaned sessions.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the network continuously monitors validity conditions for all background data sessions, then network control and resource optimization are improved, but signaling overhead and network entity processing complexity increase

Engineering Contradiction:

Improvenetwork controlVSAvoidnetwork entity processing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The UE autonomously determines whether it satisfies validity conditions (checking its own location against service areas, verifying current time against time windows) and reports this status to the network. This self-service approach transfers the monitoring burden from the network to the UE, reducing network entity complexity while maintaining reliable validity control.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Instead of continuously monitoring all sessions, the network implements validity checks only when triggered by specific events (e.g., session establishment, modification, or periodic updates). This partial monitoring strategy reduces signaling overhead and processing complexity while maintaining sufficient control over session validity states.

Inventive Principle:

Principle #16Partial or excessive action

3Productivity

If validity conditions are strictly enforced with automatic session release, then network resource efficiency is improved, but potential data transfer interruptions and reduced service continuity occur

Engineering Contradiction:

Improvenetwork resource efficiencyVSAvoidservice continuity

Core Design Contradiction:

ProductivityVSDuration of action of stationary object

Solution Approach 1:

The system provides advance notice to the UE about impending session invalidity (e.g., notifying before a time window expires or before the UE leaves a service area). This cushioning period allows the UE to complete ongoing data transfers or initiate handover procedures before the session is released, reducing interruptions while maintaining resource efficiency through timely session termination.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS11425263B2Validity information conditions for a protocol data unit session for background data transfer

Publication Date: 2022.08.23 LENOVO (SINGAPORE) PTE LTD

AI summary

Apparatuses, methods, and systems are disclosed for using validity information conditions for a protocol data unit session for background data transfer. One method for using validity information conditions for a protocol data unit session for background data transfer includes a device determining validity information for the protocol data unit session for the background data transfer. The device initiates release of the protocol data unit session if a condition of the validity information is not satisfied.