Manual Closed Access Group Selection Control in Wireless Networks
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Solution Overview
Problem
Existing wireless communication systems lack a method for effectively controlling manual closed access group (CAG) selection, which is crucial for managing user access to non-public networks in a controlled manner.
Innovation Solution
The system determines and provides manual CAG selection control information, allowing the control unit (CU) and/or access and mobility management function (AMF) to decide whether to permit manual CAG selection by a user equipment (UE) for specific CAG IDs associated with a public land mobile network (PLMN).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual CAG selection is allowed for all CAG IDs, then UE flexibility and ease of operation are improved, but network security and access control are compromised
Solution Approach 1:
The patent applies local quality by providing different manual CAG selection control settings for different PLMNs. The control information is configured per PLMN, allowing the network to grant manual selection permission for specific PLMNs while restricting it for others, thus achieving localized security policies rather than uniform control across all networks
Solution Approach 2:
The patent implements dynamics by making the manual CAG selection capability configurable and changeable through control information provided by the network. The UE's manual selection permission is not fixed but can be dynamically adjusted based on network policies, allowing flexible security management
2Manufacturing precision
If manual CAG selection control information is provided for each PLMN, then network management precision is improved, but device complexity and information overhead increase
Solution Approach 1:
The patent applies universality by using a standardized control information structure that can be uniformly applied across multiple PLMNs. The same control mechanism and information format are used for all PLMNs, allowing the system to manage precise per-PLMN control without requiring separate complex mechanisms for each network
Solution Approach 2:
The patent implements preliminary action by pre-configuring the manual CAG selection control information in the UE before manual selection is needed. The control information is provided in advance through system information or dedicated signaling, so the UE is already prepared with the necessary permissions and constraints when manual selection becomes necessary
Data Source
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AI summary
The present disclosure relates to manual closed access group (CAG) selection in wireless communications. According to an embodiment of the present disclosure, a method performed by a central unit (CU) in a wireless communication system comprises: receiving, from a distribution unit (DU), information informing whether to allow a manual closed access group (CAG) selection on a CAG identifier (ID) not included in a list of allowed CAG IDs of a wireless device for each of public land mobile networks (PLMNs); receiving, from an access and mobility management function (AMF), a list of PLMNs supported by the AMF; determining CAG control information informing at least one PLMN for which a manual CAG selection on a CAG ID not included in the list of allowed CAG IDs of the wireless device is allowed, based on the list of PLMNs supported by the AMF and the information received from the DU; and transmitting, to the DU, the CAG control information.