Non-Public Cellular Network Discovery Using Broadcast Access Cues
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Solution Overview
Problem
Existing technologies have not established efficient methods for user equipment to detect and access non-public cellular networks, hindering seamless use of such networks.
Innovation Solution
A communication control method where a network node broadcasts a cell identifier and frequency information of a non-public cellular network, and user equipment performs a search process to determine access eligibility based on predetermined identifiers and subscription information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If user equipment performs comprehensive search for non-public cellular networks, then detection capability is improved, but search time and processing complexity increase
Solution Approach 1:
The network node performs preliminary actions by broadcasting cell identifiers and frequency information of non-public cellular networks before user equipment needs to search. This allows UEs to have advance knowledge of available networks, eliminating the need for comprehensive time-consuming searches and enabling direct targeted access.
2Difficulty of detecting and measuring
If user equipment stores comprehensive subscription information for all networks, then access eligibility determination is improved, but device memory requirements and information management complexity increase
Solution Approach 1:
The invention extracts only the necessary subscription information (first identifier corresponding to the group identifier) from comprehensive subscription data and stores it in the SIM card. This selective extraction reduces storage requirements while maintaining the ability to determine access eligibility by comparing the broadcast group identifier with the stored first identifier.
3Difficulty of detecting and measuring
If network nodes broadcast detailed non-public network information, then network discoverability is improved, but network security and access control complexity increase
Solution Approach 1:
The invention applies local quality by broadcasting only specific essential information (cell identifier and frequency information) rather than detailed network parameters. Access control is simplified to local verification by comparing the broadcast group identifier with the subscriber's first identifier stored in the SIM, maintaining security without requiring complex access control mechanisms.
Data Source
AI summary
A communication control method comprises broadcasting, by a network node configured to manage a cell belonging to a public cellular network, a cell identifier of a cell belonging to a non-public cellular network, and frequency information indicating frequency of the non-public cellular network, and performing, by a user equipment, a search process for the cell belonging to the non-public cellular network on the frequency indicated by the frequency information. The performing the search process for the non-public cellular network includes determining whether predetermined information includes a first identifier. The first identifier is broadcasted by the cell belonging to the public cellular network and is an identifier of a group including users that can access the non-public cellular network. The search process includes a step in which the user equipment obtains the predetermined information included in subscription information of the user equipment.