Radio Notification Area for 5G UE State Synchronization
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Solution Overview
Problem
In the 5G mobile communication technology, the transition of User Equipment (UE) from an RRC inactive state to a connected state is inefficient due to high signaling overhead and delayed data transmission, as the base station lacks flexible control over this transition, reducing service data transmission efficiency.
Innovation Solution
Configuring UE information within a radio notification area, allowing base stations to accurately determine the RRC state of UE, by determining a radio notification area and synchronously sending UE information to all base stations within this area, including using notification messages to instruct the core network device to disseminate this information when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the base station stores context information of the UE in RRC inactive state, then the signaling overhead is reduced and the switching time is shortened, but the base station cannot flexibly and accurately control the UE to switch to RRC connected state at an appropriate time, reducing the transmission efficiency of service data
Solution Approach 1:
The source base station performs preliminary action by determining the radio notification area and proactively sending UE information to all base stations within this area before the UE actually moves or needs to switch states. This advance preparation ensures that when the UE needs to transition from RRC inactive to connected state, the target base station already has the necessary context information, enabling immediate and efficient state switching without waiting for additional signaling exchanges.
Solution Approach 2:
The core network device serves as an intermediary in the information distribution process. When base stations lack direct inter-base-station interfaces, the core network device receives notification messages from the source base station and forwards UE information to the appropriate base stations. This intermediary mechanism ensures comprehensive information distribution across the network while maintaining flexibility in controlling UE state transitions.
2Measurement precision
If the UE information is sent to all base stations within the radio notification area, then the base stations can accurately determine the RRC state of the UE, but the device complexity increases due to the need for inter-base-station interfaces and coordination mechanisms
Solution Approach 1:
The UE information structure is designed to be universal and multi-functional, containing all necessary context information that any base station within the radio notification area may need. This standardized information format can be directly used by any base station for state determination and control operations, eliminating the need for complex base station-specific adaptation logic and reducing overall system complexity while maintaining high accuracy in RRC state determination.
3Adaptability or versatility
If the source base station sends notification messages to the core network device for disseminating UE information, then the UE information can be distributed to base stations without direct interfaces, but the signaling overhead increases
Solution Approach 1:
The system implements partial action by selectively using the core network device as an intermediary only when necessary - specifically when base stations lack direct inter-base-station interfaces. When direct interfaces exist between base stations, the system uses the more efficient direct path. This conditional approach balances the need for network flexibility with the goal of minimizing signaling overhead, applying the core network mediation path only where it provides necessary adaptability.
Data Source
AI summary
Methods and apparatuses are provided for configuring UE information. The method may include: after UE is controlled to switch from an RRC connected state to an RRC inactive state, a radio notification area is determined, where the radio notification area indicates a set of one or more cells and the UE in the RRC inactive state moving among the cells in the radio notification area does not cause a cell handover; and UE information of the UE is sent to all base stations within the radio notification area. The UE information of the UE in the RRC inactive state is synchronously configured to other base stations within the radio notification area, such that the base stations may accurately and efficiently determine the RRC state of the UE, thereby improving the transmission efficiency between the base station and the UE.