Mobile Station Access Control for Multi-PLMN Radio Base Stations
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Solution Overview
Problem
Conventional mobile communication systems fail to appropriately manage access control when a radio base station is connected to multiple PLMNs, leading to potential access issues even if a secondary PLMN experiences failure or congestion, as access control is solely based on Extended Access Barring parameters for the primary PLMN.
Innovation Solution
A mobile station with a determination unit that differentiates between access control information for the primary and registered PLMNs, determining access control based on specific EAB parameters broadcast by the radio base station, allowing for separate access control configurations for each network, even when the same EAB parameters are applied to both.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If access control is determined solely based on EAB parameters for the primary PLMN, then the access control mechanism is simple and easy to implement, but the system reliability deteriorates when the registered PLMN experiences failure or congestion
Solution Approach 1:
The access control information is segmented into separate EAB parameter sets for each PLMN (primary PLMN and registered PLMN). The mobile station determines access control based on the registered PLMN's EAB parameters when attached, rather than using a single unified access control mechanism. This segmentation allows independent access control management for each network, improving reliability without significantly increasing complexity.
2Adaptability or versatility
If separate access control configurations are implemented for each PLMN, then the system adaptability improves to handle different network conditions, but the device complexity increases due to multiple EAB parameter sets
Solution Approach 1:
The access control configuration is made dynamic by allowing the mobile station to switch between different EAB parameter sets based on the current registered PLMN. When the mobile station attaches to a PLMN, it dynamically selects the corresponding EAB parameters for that specific network. This dynamic adaptation enables the system to handle different network conditions appropriately while the underlying structure remains manageable through standardized parameter organization.
Data Source
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AI summary
Access control is appropriately performed in a case where a radio base station eNB is connected to multiple PLMNs. A mobile station MTC-UE of the invention includes a determination unit 12 configured to determine existence of access control on the basis of EAB parameters included in broadcast information transmitted by the radio base station eNB. When EAB parameters for an R-PLMN to be applied to the R-PLMN are set in an SIB 2 in addition to EAB parameters for a P-PLMN to be applied to the P-PLMN, the determination unit 12 determines the existence of the access control for the R-PLMN on the basis of the EAB parameters for the R-PLMN.