5G NR Access Control for Inactive RRC State
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Solution Overview
Problem
Current wireless cellular communication systems face challenges in managing access control during congestion situations, particularly in next-generation 5G New Radio (NR) systems, where overload on Random Access Channels and network nodes can occur due to sudden surges in traffic, necessitating efficient mechanisms to prioritize services and users.
Innovation Solution
The implementation of hierarchical Access Control (AC) parameter signaling structures and network slicing techniques to manage access attempts across various NR RRC states, allowing for slice-specific AC mechanisms that partition RAN resources, prioritize services, and efficiently handle different types of traffic, including eMBB, mMTC, and URLLC use cases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If access control mechanisms are implemented to prevent network overload, then network reliability is improved, but device complexity increases
Solution Approach 1:
The access control mechanism is segmented into multiple hierarchical levels including RRC_IDLE state access control, RRC_INACTIVE state access control, and RRC_CONNECTED state access control. Each level has its own specific parameters and control logic, allowing the system to manage complexity through modular organization while comprehensively preventing network overload at different operational states
Solution Approach 2:
The system dynamically adjusts access control parameters such as access barring factors, access delay parameters, and priority levels based on network conditions and service types. By changing these parameters rather than the fundamental control structure, the system maintains reliability while managing device complexity through flexible configuration
2Productivity
If slice-specific AC mechanisms are implemented to prioritize services, then service quality is improved, but system complexity increases
Solution Approach 1:
The network is divided into multiple network slices, each with dedicated access control parameters and resources. This segmentation allows different service types (eMBB, mMTC, URLLC) to have customized access control mechanisms tailored to their specific requirements, improving service quality while managing complexity through isolated, purpose-built control logic for each slice
Solution Approach 2:
The access control system is designed with universal structures and procedures that can be applied across all network slices and RRC states. By using standardized frameworks that serve multiple functions and scenarios, the system achieves service differentiation without proportionally increasing overall system complexity
3Reliability
If access control parameters are signaled for all NR RRC states, then access control effectiveness is improved, but signaling overhead increases
Solution Approach 1:
The system extracts and applies only the necessary access control parameters for each specific RRC state and service type, rather than signaling all parameters universally. This selective extraction reduces signaling overhead by transmitting only the relevant subset of parameters needed for effective access control in each context
Solution Approach 2:
The system implements partial signaling of access control parameters based on current network conditions and device states. By signaling parameters selectively rather than comprehensively in all situations, the system maintains access control effectiveness while minimizing unnecessary signaling overhead
Data Source
AI summary
Described is an apparatus of a User Equipment (UE). The apparatus may comprise a first circuitry, a second circuitry, and a third circuitry. The first circuitry may be operable to determine that the UE is in an Inactive Radio Resource Control (RRC) state. The second circuitry may be operable to process a first transmission received by the UE while the UE is in the Inactive RRC state, the first transmission carrying a set of one or more Access Control (AC) parameters. The third circuitry may be operable to regulate the sending of a second transmission, in accordance with the set of one or more AC parameters, while the UE is in the Inactive RRC state.