Private Network Access Control via Common Identification Indicator
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Solution Overview
Problem
As the number of private networks increases, managing and transmitting forbidden Tracking Area (TA) lists becomes cumbersome, leading to increased signaling overhead and operational burden, making it difficult to determine whether a user equipment has access rights to a private network.
Innovation Solution
Incorporating a common identification indicator in the broadcast channel (BCH) that indicates whether a cell belongs to a private network, allowing user equipment to determine access rights without needing a large forbidden TA list, by comparing cell or tracking area identifications with stored values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If forbidden TA lists are transmitted to user equipment to control access to private networks, then access control reliability is improved, but signaling overhead and device complexity increase
Solution Approach 1:
The patent extracts the essential access control function from the complex forbidden TA list mechanism. Instead of transmitting and storing complete forbidden TA lists, only a simple indicator flag is transmitted to indicate whether the current TA is forbidden. This extraction reduces the information burden while maintaining the core access control functionality.
Solution Approach 2:
The patent changes the parameter representation from detailed TA list information to a simple binary indicator. By transforming the access control information from a complex data structure (forbidden TA list with multiple TA identities) to a simple parameter (indicator flag with 0 or 1), the signaling overhead and processing complexity are significantly reduced while maintaining access control reliability.
2Measurement precision
If complete forbidden TA lists are transmitted to user equipment, then access control precision is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential access control decision information from the complete forbidden TA list. Instead of transmitting all TA identities in the forbidden list, only a compact indicator is transmitted that enables the user equipment to determine whether the current TA is forbidden, significantly reducing signaling overhead.
Solution Approach 2:
The patent uses a simplified copy or representation of the forbidden TA list information. Rather than transmitting the actual complete list, a compact indicator copy is transmitted that contains sufficient information for access control decisions, reducing the information transmission burden while maintaining control precision.
3Reliability
If user equipment stores and checks forbidden TA lists during cell reselection, then access control reliability is improved, but processing time and energy consumption increase
Solution Approach 1:
The patent extracts the critical access control decision from the time-consuming process of storing and checking complete forbidden TA lists. By using a simple indicator that can be quickly evaluated during cell reselection, the processing time is significantly reduced while maintaining access control reliability through the same underlying decision logic.
Data Source
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AI summary
User equipment used in a mobile communication system is disclosed that includes a specifying unit specifying a tracking area of a serving cell based on broadcast information, a determination unit determining whether the user equipment is entitled to communicate in the private network, and a transmission unit transmitting a signal requesting to update the tracking area to a base station of the serving cell, in which the determination unit determines whether the specified tracking area is for the private network by checking a common identification which is common to private networks, and the determination unit determines whether the user equipment is entitled to communicate in the private network by determining whether the private network to which the serving cell belongs is the same as or different from a private network in which the user equipment is entitled to communicate.