Uniform Access Barring for NR RRC States
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Solution Overview
Problem
The new radio (NR) system requires a uniform access control mechanism that can handle all cases and scenarios defined in the LTE system, including various RRC protocol states, while ensuring compatibility across different terminal states and network conditions.
Innovation Solution
An access barring method and apparatus that utilize parameters defined for the NR system to perform access barring checks or access class determinations, simplifying the access mechanism by using one or two parameters applicable to all RRC states, including idle, connected, and inactive states, and allowing differentiation based on UE-related and service-related parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple access barring mechanisms are used for different RRC states and scenarios, then access control precision is improved, but device complexity and operation complexity increase
Solution Approach 1:
The patent applies universality by designing a single access barring mechanism that can handle all RRC states (idle, connected, inactive) and all access scenarios (data, signaling, emergency, high-priority). The mechanism uses a unified parameter set including access barring factor, barring time, and priority level, which can be configured differently for various scenarios but follows the same operational framework, thereby reducing device complexity while maintaining access control precision
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting access control parameters (barring factor, barring time, priority level) based on the specific RRC state and access scenario. The terminal device determines the appropriate parameter set according to its current state and the nature of the access attempt, allowing precise control without requiring multiple distinct mechanisms. This resolves the contradiction by enabling precision through parameter variation rather than structural complexity
2Measurement precision
If multiple access barring mechanisms are used for different RRC states and scenarios, then access control precision is improved, but ease of operation deteriorates
Solution Approach 1:
The unified access barring mechanism provides ease of operation by eliminating the need for the terminal device to manage multiple separate mechanisms for different RRC states. The single mechanism automatically adapts to various scenarios through parameter selection based on the current state and access type, simplifying the operational burden on the terminal while maintaining precise access control across all scenarios
Solution Approach 2:
The access barring mechanism incorporates self-service by enabling the terminal device to autonomously determine the appropriate parameter set based on its current RRC state and the nature of the access attempt. The terminal automatically selects the correct barring parameters without requiring complex manual configuration or intervention, thereby improving ease of operation while maintaining access control precision through state-aware parameter selection
Data Source
AI summary
An access barring method and apparatus and a communication system. The method includes: performing access barring check or access class determination by UE by using parameters defined for a new radio system. The parameters are applicable to all radio resource control (RRC) states. For different public land mobile networks (PLMNs) and/or network slicing, the parameters are identical or different. With the embodiments of this disclosure, selectable parameters are provided for a uniform access control mechanism defined by an NR system, thereby simplifying an access mechanism, and ensuring all-directional compatibility of a terminal state.