User Equipment Access Control for Non-Public Networks
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Solution Overview
Problem
In NR wireless communication systems, user equipment cannot effectively restrict access to cells supporting non-public networks, leading to unauthorized access attempts.
Innovation Solution
User equipment is equipped with a receiving unit to receive system information and a control unit that determines, based on specific information elements and identifiers, whether a cell is suitable for access, allowing only authorized users to connect to cells supporting non-public networks by identifying closed access groups (CAGs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user equipment attempts to access cells supporting non-public networks, then connection establishment is enabled, but unauthorized access occurs
Solution Approach 1:
The user equipment performs preliminary evaluation of system information before accessing the cell. The control unit checks whether the cell is suitable for access by evaluating information elements and identifiers in advance, preventing unauthorized access attempts before they occur.
Solution Approach 2:
The user equipment uses feedback from system information broadcast by the base station to determine accessibility. The control unit evaluates the system information containing information elements and identifiers, and based on this feedback, determines whether the cell is suitable for access, thereby controlling unauthorized access.
2Object-affected harmful factors
If access restrictions are implemented for non-public network cells, then unauthorized access is prevented, but access control complexity increases
Solution Approach 1:
The user equipment autonomously performs access restriction evaluation without requiring complex external control systems. The control unit within the user equipment itself evaluates the system information and determines whether the cell is suitable for access, making the access control mechanism self-contained and reducing overall system complexity.
Solution Approach 2:
The access control mechanism operates by changing the evaluation parameters based on system information. The control unit modifies its access determination based on the information elements and identifiers found in the system information, allowing flexible and adaptive access control without complex fixed rules.
Data Source
AI summary
A user equipment includes a receiving unit configured to receive system information from a cell, a control unit configured to determine, based on an information element and identifiers, whether or not the cell is a candidate to be selected, the information element indicating other uses included in the system information and identifiers being of a plurality of closed access groups (CAGs) identifying groups of subscribers who are allowed to access the cell, and a communication unit configured to perform access to the cell in a case in which the control unit determines that the cell is the candidate to be selected.