Access Barring Control for Disaster Inbound Roamers
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Solution Overview
Problem
Existing wireless communication systems struggle to manage network congestion effectively during disasters by differentiating between regular subscribers and disaster inbound roamers, leading to service degradation for regular subscribers due to overwhelming access attempts from disaster inbound roamers.
Innovation Solution
Implementing a method for user equipment (UE) and base stations to provide and apply differentiated access barring configurations based on access identities, using enhanced barring factors and offsets for disaster inbound roamers, while preserving privileges for UEs with special access identities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If differentiated access barring configurations are implemented for disaster inbound roamers, then network congestion is reduced and service quality for regular subscribers is maintained, but device complexity and protocol overhead increase
Solution Approach 1:
The access control mechanism is segmented by introducing access identities that categorize UEs into different groups (disaster inbound roamers vs. regular subscribers). The base station provides differentiated barring configurations for different access identities, allowing selective access control without requiring complex individual UE identification and processing
Solution Approach 2:
Differentiated barring configurations are applied locally to specific access identities rather than uniformly to all UEs. Disaster inbound roamers receive specific barring parameters while regular subscribers maintain normal access, achieving localized quality control that reduces overall system complexity
2Measurement precision
If access identities are introduced to differentiate disaster inbound roamers, then access control precision is improved, but message overhead and protocol complexity increase
Solution Approach 1:
Access identities serve multiple functions: they differentiate disaster inbound roamers from regular subscribers, enable selective application of barring configurations, and maintain compatibility with existing access control mechanisms. This multi-functionality reduces the need for separate messaging protocols for each control objective
3Adaptability or versatility
If barring configurations are provided for each access identity, then access control granularity is improved, but network signaling overhead increases
Solution Approach 1:
The system changes parameters (barring factors, barring times) associated with different access identities to achieve granular access control. By modifying these parameters rather than creating entirely separate control mechanisms, the system achieves flexibility while minimizing signaling overhead
Data Source
AI summary
Provided is a method by a user equipment (UE), comprising: receiving, from a base station (BS), one or more messages providing different barring configurations for different access identities in an access identity set, the UE has at least one access identity, and the at least one access identity is from the access identity set and indicates that the UE is a disaster inbound roamer with respect to the BS; and performing, by the UE, an access barring check based on the one or more messages.