Network Access Control Settings Update via Default Fallback
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Solution Overview
Problem
Communication devices operating in RRC 'connected' mode, such as UEs, fail to receive updates to access control information like DSAC and PPAC, leading to potential over- or under-utilization of network resources due to mismatched access class barring settings during network congestion changes or SRNS relocations.
Innovation Solution
The method involves receiving access control information from the serving network, storing it, and upon determining a network change, replacing specific settings with default access control settings to ensure appropriate access permissions across different network domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If communication devices operate in RRC connected mode continuously, then connection stability is improved, but access control information updates are lost leading to resource misutilization
Solution Approach 1:
The device stores default access control settings in advance (DSAC/PPAC parameters) before network changes occur. When serving network changes are detected, these pre-stored settings are immediately applied without needing to receive updates during connected mode, thus preventing both connection disruption and information loss.
2Measurement precision
If devices update access control settings frequently, then access control accuracy is improved, but network overhead and device complexity increase
Solution Approach 1:
The solution dynamically updates access control settings only when serving network changes are detected, rather than continuously or frequently. The device monitors for network change events and applies stored default settings at these specific moments, achieving accurate access control without excessive updates that would increase complexity.
Solution Approach 2:
The device autonomously detects serving network changes and self-updates its access control settings using pre-stored default values, without requiring continuous network intervention or complex update mechanisms. This self-service approach maintains accuracy while minimizing device and network complexity.
3Reliability
If devices rely on network-provided access control information, then access control reliability is improved, but devices cannot adapt to network changes independently
Solution Approach 1:
The device pre-acquires and stores default access control settings (DSAC/PPAC) from the network before disconnected events occur. When network changes happen, the device independently applies these pre-stored settings, ensuring both reliable access control (using network-provided defaults) and adaptability (independent application during network changes).
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
Access control information is received from a first network, which is the device's serving network (500). The received access control information is stored as access control settings (505). A first connection is established via the serving network based on one or more of the access control settings (510). It is determined that the device's serving network has changed to a second network (515). At least a portion of the access control settings is replaced with default access control settings (520). The access control settings may comprise one or more packet-domain settings and one or more circuit-domain settings. The access control information may comprise Domain Specific Access Control (DSAC) and/or Paging Permission with Access Control (PPAC) information. The default access control settings may comprise access class barring (ACB) information.