Disaster Roaming UE Cell Barring for Operator Networks
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Solution Overview
Problem
In wireless communications, disaster roaming UEs associated with Access Identity 3 are not barred from accessing cells reserved for operator use, leading to potential errors and resource wastage, as current systems do not effectively prevent these UEs from selecting cells intended for operator-specific use.
Innovation Solution
A method and system where UEs determine if a cell is reserved for operator use and, if associated with disaster roaming, treat it as barred, preventing access by modifying the UAC framework to include specific barring parameters for Access Identity 3 UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If disaster roaming UEs are allowed to access cells reserved for operator use, then network coverage and service availability are improved, but errors and resource wastage occur
Solution Approach 1:
The patent applies local quality by differentiating access permissions for different UE types within the same cell. Cells reserved for operator use maintain exclusive access for operator UEs while allowing disaster roaming UEs from other networks, creating localized access control policies that prevent errors while maintaining network coverage.
Solution Approach 2:
The patent introduces an intermediary mechanism through the cellReservedForOperatorUse flag and access identity-based control. This intermediary layer mediates between disaster roaming UEs seeking coverage and operator UEs requiring exclusive access, enabling selective permitting that prevents harmful access while maintaining beneficial coverage.
2Adaptability or versatility
If disaster roaming UEs are allowed to access cells reserved for operator use, then network coverage is improved, but resource wastage occurs
Solution Approach 1:
The patent implements local quality by applying different resource allocation rules to different UE categories within operator-reserved cells. Operator UEs receive full resource access while disaster roaming UEs are restricted, ensuring that resources are not wasted on UEs that cannot properly utilize them while maintaining coverage availability.
Solution Approach 2:
The patent uses an intermediary control mechanism through access identity verification and cell reservation flags. This intermediary layer prevents resource wastage by blocking disaster roaming UEs from consuming resources in cells where they cannot provide useful service, while still allowing them to access non-reserved cells for coverage.
3Reliability
If cells are reserved for operator use only, then operator UE performance is improved, but disaster roaming capability is reduced
Solution Approach 1:
The patent applies segmentation by dividing cell access permissions into distinct categories based on UE access identity and cell reservation status. Operator UEs with specific access identities receive guaranteed access to reserved cells for reliable performance, while disaster roaming UEs from other networks are segmented into a separate category that can access non-reserved cells, maintaining overall roaming capability.
Solution Approach 2:
The patent introduces an intermediary control layer through the cellReservedForOperatorUse flag and access identity-based permitting. This intermediary mechanism mediates between operator performance requirements and disaster roaming needs, allowing selective access that maintains reliability for operator UEs while preserving roaming capability for disaster UEs through conditional permitting.
Data Source
AI summary
A method (700) by a user equipment for preventing disaster roaming in a first cell reserved for operator use includes obtaining (702) information indicating that the first cell associated with a first network is reserved for operator use. Based on the information indicating that the first cell is reserved for operator use and based on the UE being assigned an access identity that is associated with disaster roaming, the user equipment determines (704) to treat the first cell as barred.