Disaster Roaming Control via Pre-configured PLMN Lists
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Solution Overview
Problem
In disaster situations, 5G communication systems face challenges in controlling and managing disaster roaming services, leading to costly services for Home PLMNs when they rely on Forbidden PLMNs, resulting in potential service interruptions and high charges.
Innovation Solution
A method and system where a UE is configured with a flag using NAS signaling to indicate whether it can use disaster roaming, allowing it to select a PLMN for disaster roaming service based on a pre-configured or updated disaster PLMN list, prioritizing service continuity while minimizing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HPLMN allows UEs to use disaster roaming service on FPLMN during disasters, then service continuity is improved, but roaming charges increase significantly
Solution Approach 1:
The network pre-configures a disaster PLMN list in UEs before disasters occur. This list contains prioritized PLMNs that may provide disaster roaming services. When a disaster is detected, UEs can quickly camp on pre-identified PLMNs from this list, enabling rapid service restoration while allowing the network to control which PLMNs are used, thereby managing roaming charges.
Solution Approach 2:
The patent introduces a disaster roaming enabled indication parameter that can be configured in UEs. This parameter controls whether UEs are allowed to access disaster roaming services. By dynamically setting this parameter, the network can enable or disable disaster roaming on demand, balancing service continuity needs against roaming charge concerns based on the specific disaster situation.
2Loss of energy
If HPLMN restricts UE access to disaster roaming service, then roaming charges are reduced, but service availability decreases
Solution Approach 1:
The system dynamically adjusts disaster roaming accessibility based on network conditions and disaster severity. The disaster roaming enabled indication can be updated by the network to reflect current needs. Additionally, the disaster PLMN list provides multiple prioritized options, allowing UEs to attempt camp on preferred PLMNs first, and only access alternative PLMNs if necessary, creating a dynamic, multi-tiered approach to disaster roaming management.
3Loss of time
If UEs automatically camp on available PLMN during disasters, then service restoration is fast, but HPLMN loses control over service quality and costs
Solution Approach 1:
The network pre-configures both the disaster PLMN list and the disaster roaming enabled indication in UEs before disasters occur. This preliminary configuration allows UEs to immediately attempt camp on appropriate PLMNs when disasters happen, achieving fast service restoration. Simultaneously, because these configurations are network-controlled, the HPLMN maintains oversight and control over which PLMNs its UEs can access, preventing uncontrolled roaming behavior.
Solution Approach 2:
The system establishes feedback loops where UEs report their disaster roaming status and camped PLMN information back to the network. The network can then monitor and adjust the disaster roaming enabled indication and update the disaster PLMN list based on observed conditions, ensuring continuous control over service quality and roaming costs while maintaining fast service restoration capabilities.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5G communication system for supporting higher data rates beyond a 4G system with a technology for IoT. Embodiments herein provide method for controlling disaster roaming service in a wireless network by UE. The method includes receiving a disaster roaming enabled indication from first PLMN or second PLMN associated with UE. Further, the method includes detecting a disaster condition. Further, the method includes determining whether the disaster roaming enabled indication indicates that a disaster roaming is disabled in UE or disaster roaming is enabled in UE. In an embodiment, the method includes enabling the disaster roaming service at UE and allowing UE to select the PLMN for using the disaster roaming service during the disaster condition in response to determining that disaster roaming is enabled in UE.