UE Disaster Roaming Registration for Wireless Service Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in providing continuous service when a user equipment (UE) is located in a service provider's area but temporarily cannot receive services due to disasters or network issues, necessitating rapid network recognition and seamless transition to another service provider's network.
Innovation Solution
A method and device enabling UE to perform registration to a first PLMN via a first base station, receive disaster-related messages, and transmit registration requests to a second PLMN offering disaster roaming services, establishing an RRC connection to ensure continuous service through a second PLMN when the first PLMN is unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE remains registered to the first PLMN during disaster, then service continuity is maintained, but service availability deteriorates when the first PLMN is unavailable
Solution Approach 1:
The UE dynamically adjusts its network registration state based on received disaster-related messages. When a disaster is detected, the UE transitions from a static registered state to a dynamic state where it can selectively register to alternative PLMNs, allowing the system to adapt to changing network conditions while maintaining service continuity
Solution Approach 2:
The disaster-related message acts as an intermediary that triggers the registration behavior change. The message contains information about the disaster state and available alternative PLMNs, enabling the UE to make informed decisions about network registration without directly detecting the disaster condition
2Speed
If UE automatically selects network without disaster recognition, then service access speed is improved, but service reliability deteriorates due to inability to recognize network problems
Solution Approach 1:
The UE performs preliminary actions by receiving and processing disaster-related messages before attempting network registration. This preliminary detection of disaster conditions allows the UE to adjust its registration strategy in advance, preventing failed registration attempts and ensuring reliable service access when disasters are present
Solution Approach 2:
The disaster-related message provides feedback to the UE about the network's operational state. This feedback mechanism enables the UE to recognize when automatic network selection should be modified due to disaster conditions, maintaining both fast access and high reliability by adjusting behavior based on received information
Data Source
AI summary
A method for performing, by a user equipment (UE), a registration to a network in a wireless communication system is disclosed. Specifically, the UE performs a registration to a first public land mobile network (PLMN) via a first base station, receives an disaster related message applied to the first PLMN or applied to an area in which the UE is located when there is no service provided from the first PLMN, transmits a registration request message to a second PLMN providing an disaster roaming service based on the disaster related message, and receives, from the second PLMN, a response message to the registration request message. The UE is subscribed to the first PLMN, and the second PLMN is configured to provide the disaster roaming service to the UE based on a disaster applied to the first PLMN or applied to the area in which the UE is located.