Serving Cell Switching With Preconfigured NR Cell Information
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Solution Overview
Problem
Current cell management methods in New Radio (NR) systems, such as cell handover or PSCell changes, rely on Layer 3 commands, leading to significant latency due to configuration signaling and random access procedures.
Innovation Solution
Implementing a method where terminals manage serving cells based on pre-configured cell configurations using physical layer or MAC CE commands, reducing the need for Layer 3 interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell management is performed using Layer 3 commands (RRC signaling), then configuration accuracy and reliability are ensured, but significant latency is introduced due to multiple signaling interactions and random access procedures
Solution Approach 1:
The patent pre-configures cell management information (CM Information) including target cell IDs, beam IDs, and uplink resource configurations at Layer 3 before actual cell management operations are needed. This preliminary configuration stores multiple candidate cells and their associated parameters in the UE, so that when cell management is required, the UE can immediately execute the pre-prepared configurations without initiating time-consuming signaling exchanges or random access procedures, thus resolving the latency issue while maintaining configuration accuracy through validated pre-configured parameters
Solution Approach 2:
The patent extracts essential cell management parameters (target cell ID, beam ID, uplink resource allocation) from the complex Layer 3 RRC signaling process and consolidates them into compact pre-configured information structures. By separating these critical parameters from the full RRC configuration and storing them in an optimized format, the system enables rapid cell management execution without requiring complete Layer 3 signaling interactions, thereby reducing latency while preserving the necessary configuration accuracy
2Loss of time
If pre-configured cell information is stored and used for rapid cell management, then latency is reduced, but device complexity increases due to additional configuration storage and management requirements
Solution Approach 1:
The patent implements local quality by organizing pre-configured cell information into structured records with specific fields (target cell ID, beam ID, uplink resource allocation, validity flags) tailored to each potential target cell. Rather than storing uniform generic configuration data, the system maintains specialized pre-configured information for each cell scenario, including only the parameters relevant to that specific cell type and management operation. This localized, targeted configuration approach reduces the overall storage burden and simplifies retrieval operations compared to storing complete universal configurations, thereby reducing device complexity while enabling rapid cell management
Solution Approach 2:
The patent segments cell management information into distinct, independently manageable components: target cell identification, beam configuration, uplink resource allocation, and validity indicators. Each segment can be individually stored, retrieved, and executed. This segmentation allows the UE to process only the specific segment needed for the current operation without handling entire configuration sets, reducing memory access complexity and processing overhead. The modular segmented structure simplifies the management mechanism compared to monolithic configuration storage, addressing the device complexity concern while maintaining low-latency cell management capabilities
Data Source
AI summary
The present disclosure provides a serving cell management method, apparatus, terminal, and network device. The method includes: receiving, by a terminal, a first command sent by network device; and performing, by the terminal, management of the serving cell according to the first command and the configuration information of a pre-configured cell corresponding to the serving cell.