Disaster Roaming PLMN TAI List Segmentation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

During disasters, Public Land Mobile Networks (PLMNs) face congestion issues when User Equipment (UEs) from affected areas attempt to register with unaffected PLMNs, leading to service interruptions and increased load, with no effective mechanism to distribute subscribers and prevent unauthorized service provision outside disaster areas.

Innovation Solution

A method where UEs detect disaster conditions and send registration requests to available PLMNs, receiving a Tracking Area Identity (TAI) list to camp on specific areas, and PLMNs generate and allocate updated TAI lists to manage disaster roaming services, ensuring service is restricted to disaster areas and avoiding congestion by rejecting registrations outside these areas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UEs from affected PLMN attempt to register with unaffected PLMNs during disaster, then service continuity is improved, but network congestion increases

Engineering Contradiction:

Improveservice continuityVSAvoidnetwork congestion

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the service area by providing separate TAI lists for different geographic regions. The affected PLMN provides TAI lists that are specific to disaster-affected areas, while unaffected PLMNs provide TAI lists for their respective service areas. This segmentation ensures that disaster roaming UEs can access services in affected areas without causing congestion in unaffected PLMN areas, as each PLMN manages its own TAI list independently.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements local quality by making TAI lists region-specific. Each PLMN maintains separate TAI lists for different geographic regions, and the AMF selects the appropriate TAI list based on the UE's location and the affected PLMN's disaster status. This ensures that disaster roaming services are provided with appropriate local characteristics, allowing UEs to access services in affected areas while unaffected PLMNs maintain normal service quality in their regions.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If PLMN provides disaster roaming service to all UEs, then service accessibility is improved, but unauthorized service provision outside disaster areas occurs

Engineering Contradiction:

Improveservice accessibilityVSAvoidunauthorized service provision

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements feedback through the AMF's selection process. The AMF receives TAI lists from both the affected PLMN and unaffected PLMNs, and based on feedback about the UE's location and the affected PLMN's disaster status, the AMF selects the most appropriate TAI list. This feedback mechanism ensures that UEs are directed to the correct PLMN for their location, preventing unauthorized service provision while maintaining service accessibility.

Inventive Principle:

Principle #23Feedback

3Object-generated harmful factors

If PLMN rejects registration requests, then network congestion is reduced, but service availability decreases

Engineering Contradiction:

Improvenetwork congestionVSAvoidservice availability

Core Design Contradiction:

Object-generated harmful factorsVSReliability

Solution Approach 1:

The patent segments the service area by providing separate TAI lists for different geographic regions. The affected PLMN provides TAI lists that are specific to disaster-affected areas, while unaffected PLMNs provide TAI lists for their respective service areas. This segmentation allows the network to selectively provide services based on geographic location, reducing congestion in unaffected areas while maintaining service availability in affected areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamics by making the TAI list selection process adaptive. The AMF dynamically selects which TAI list to provide based on real-time information about the affected PLMN's disaster status and the UE's location. This dynamic approach allows the network to adjust service provision based on current conditions, reducing congestion when necessary while maintaining service availability when needed.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20230422060A1Method and PLMN for controlling disaster area for disaster roaming service in wireless network

Publication Date: 2023.12.28 SAMSUNG ELECTRONICS CO LTD

AI summary

Embodiments herein provide a method for controlling disaster area for disaster roaming service by a UE (100). The method includes detecting a disaster condition associated with a first PLMN (200a) that is associated with a first service provider. Further, the method includes sending a registration request to a second PLMN (200b) for the disaster roaming service. The second PLMN (200b) is associated with a second service provider and is available in a disaster area covered by the first PLMN (200a). Further, the method includes receiving a TAI list from the second PLMN (200b). The TAI list includes a set of tracking areas associated with the disaster area covered by the second PLMN (200b). Further, the method includes camping on the second PLMN (200b) for the disaster roaming service in the set of tracking areas indicated in the TAI list during the disaster condition with the first PLMN (200a).