Disaster roaming processing method and apparatus, device, and storage medium
By receiving broadcast information from Radio Access Technology (RAT), the terminal device can determine the disaster status and lift restrictions on the 4G network, thus resolving the communication interruption problem caused by 5G network failures, enabling 4G disaster roaming access, and maintaining the continuity of communication services.
WO2026144365A1PCT designated stage Publication Date: 2026-07-09CHINA TELECOM CORP LTD TECHNOLOGY INNOVATION CENTER +1
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CHINA TELECOM CORP LTD TECHNOLOGY INNOVATION CENTER
- Filing Date
- 2025-10-09
- Publication Date
- 2026-07-09
AI Technical Summary
Technical Problem
When a catastrophic event causes a 5G network failure, terminal devices are unable to access the 4G network for disaster roaming, resulting in a disruption of communication services.
Method used
The terminal device determines that the network is in a disaster state by receiving broadcast information from the Radio Access Technology (RAT), ignores the restrictions on the first RAT, activates or deactivates the disabled state of the RAT, and selects a combination of the first RAT and the network for access.
Benefits of technology
This enables terminal devices to access the 4G network for disaster roaming during 5G network failures, maintaining the continuity of communication services.
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Smart Images
Figure CN2025126530_09072026_PF_FP_ABST
Abstract
The present application relates to a disaster roaming processing method and apparatus, a communication device, a storage medium, and a computer program product. The method comprises: on the basis of broadcast information of first radio access technology (RAT), determining that a network is in a disaster state; and ignoring the restriction of the first RAT. By using the method, a network access mode can be provided for a terminal device when a base station fault occurs in a visited 5G network and a service cannot be provided any more, such that the terminal device can access a visited 4G network and perform 4G disaster roaming so as to obtain a basic communication service.
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