Private Cellular Network Discovery via Segmented SIB Access Control
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Solution Overview
Problem
Current methods for a terminal to discover and select private cellular networks are inadequate, particularly for Type-A and Type-B networks, as they require additional information beyond public cellular network identifiers, and lack effective access control to prevent resource waste and ensure stable operation.
Innovation Solution
A method involving a base station that generates and transmits a system information block (SIB) containing public network ID, private network ID, and access control information, allowing terminals to identify and access private networks, while restricting access from public networks, using PLMN ID, private network ID, and access indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal uses only public cellular network identifiers for network discovery, then the terminal can easily connect to public networks, but the terminal cannot discover or access private cellular networks
Solution Approach 1:
The network identification system is segmented into two distinct parts: public cellular network identifiers (PLMN ID) and private cellular network identifiers (private network ID). This segmentation allows terminals to use public identifiers for general network access while simultaneously supporting private identifiers for private network discovery, resolving the contradiction between easy public network connection and private network accessibility
Solution Approach 2:
The terminal is designed with multi-functionality to handle both public and private cellular networks. It can process public PLMN identifiers for general network access and private network identifiers for private network discovery, making the terminal universally compatible with both network types without sacrificing ease of operation
2Adaptability or versatility
If private cellular networks are accessible to all terminals, then network coverage is maximized, but resource waste occurs and stable operation cannot be ensured
Solution Approach 1:
Access control is implemented with local quality by applying different access permissions to different terminals based on their authorization status. Terminals with authorization can access private networks while unauthorized terminals are restricted, ensuring that network resources are consumed only by legitimate users and maintaining stable operation
Solution Approach 2:
The base station provides feedback to terminals regarding their access authorization status. The base station transmits access control information that enables terminals to determine whether they are authorized to access the private network, preventing unauthorized access and resource waste while maintaining open access for authorized devices
3Adaptability or versatility
If additional private network identification information is transmitted, then private network discovery is enabled, but system information complexity increases
Solution Approach 1:
System information is segmented into essential public network parameters and optional private network parameters. The base station transmits public PLMN identifiers as core information and includes private network identifiers as additional optional elements, allowing private network discovery functionality while maintaining a structured, manageable system information format
Solution Approach 2:
The system information block is designed with multi-functionality to serve both public and private network discovery needs. By incorporating universal structures that can accommodate both public PLMN identifiers and private network identifiers, the system maintains information organization efficiency while enabling comprehensive network discovery capabilities
Data Source
AI summary
The present disclosure relates to a communication technique for convergence of an IoT technology and a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety-related services, etc.) on the basis of a 5G communication technology and IoT-related technology. The present invention provides a method and an apparatus for discovering and selecting a private network by a terminal.