PDU Session Maintenance Using Dummy Data During Emergencies

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing network technologies face challenges in maintaining protocol data unit (PDU) sessions during emergency situations, leading to potential session termination due to inactivity timers expiring, which can disrupt critical services.

Innovation Solution

An electronic device is equipped with instructions to detect emergency events, transmit on-demand single network slice selection assistance information (S-NSSAI) to a mobility management entity, establish a PDU session, and transmit dummy data until the event ends to reset the inactivity timer, ensuring session continuity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the PDU session is maintained during emergency situations, then service continuity is improved, but network resources are consumed due to inactivity timer reset operations

Engineering Contradiction:

Improveservice continuityVSAvoidnetwork resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The system performs preliminary action by detecting emergency events before the PDU session terminates and proactively transmits dummy data to reset the inactivity timer. This prevents session termination in advance, ensuring service continuity while avoiding the need for re-establishment procedures during critical moments

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies preliminary anti-action by transmitting dummy data to counteract the inactivity timer expiration mechanism. This preemptive counter-action prevents the harmful effect of session termination caused by timer expiry during emergency situations

Inventive Principle:

Principle #9Preliminary anti-action

2Stability of the object's composition

If dummy data is transmitted continuously to maintain PDU session, then session stability is improved, but data transmission overhead increases

Engineering Contradiction:

ImprovePDU session stabilityVSAvoiddata transmission volume

Core Design Contradiction:

Stability of the object's compositionVSQuantity of substance

Solution Approach 1:

Instead of continuous transmission, the system uses periodic action by transmitting dummy data only when the inactivity timer is approaching expiration during emergency events. This intermittent transmission maintains session stability while minimizing unnecessary data overhead

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system extracts only the essential function of maintaining PDU session during emergencies by transmitting minimal dummy data solely for timer reset purposes, rather than maintaining continuous data flow. This isolates the session maintenance function from regular data transmission

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20260067663A1Electronic device, method, and non-transitory computer readable storage medium for maintaining protocol data unit session

Publication Date: 2026.03.05 SAMSUNG ELECTRONICS CO LTD

AI summary

An example electronic device may include communication circuitry, memory including storing instructions, and at least one processor including processing circuitry. The instructions, when executed by the at least one processor individually and/or collectively, may cause the electronic device to detect an event for an emergency situation, transmit a registration request message including on-demand S-NSSAI to a mobility management entity, receive a registration accept message including the on-demand S-NSSAI, transmit an establishment request message for a PDU session corresponding to the on-demand S-NSSAI to the mobility management entity, receive an establishment accept message for the PDU session from the mobility management entity, and in response to receiving the establishment accept message, transmit dummy data to a user data entity via the PDU session until an end of the event to maintain the PDU session.