Link Recovery Procedure Optimization for Carrier Aggregation Terminals
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Solution Overview
Problem
The existing Beam Failure Recovery (BFR) procedure in New Radio (NR) Rel-15 only considers one Serving Cell, failing to account for multiple Serving Cells in Carrier Aggregation (CA), which complicates the link recovery process.
Innovation Solution
A processing method and device that determine if monitoring of a downlink control channel on a first cell is not required, and if so, do not perform the link recovery procedure or expect network-configured information, instead determining a set of reference signals to perform the link recovery based on them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the link recovery procedure is performed on all Serving Cells in Carrier Aggregation, then the link recovery coverage is improved, but the system complexity and processing overhead increase significantly
Solution Approach 1:
The patent segments the Serving Cells into two categories: cells where the terminal monitors downlink control channels and cells where it does not. The link recovery procedure is selectively applied only to cells where monitoring occurs, dividing the problem into manageable parts rather than applying uniform treatment to all cells.
Solution Approach 2:
The patent applies different quality levels of link recovery processing to different cells based on their specific characteristics. For cells where downlink control channel monitoring is not required, the terminal does not expect network-configured information related to link recovery, reducing processing complexity locally while maintaining reliability where needed.
2Measurement precision
If the terminal expects network-configured information for link recovery procedure, then the link recovery accuracy is improved, but the processing overhead and time consumption increase
Solution Approach 1:
The patent applies partial action by having the terminal expect network-configured information only for cells where downlink control channel monitoring is required. For other cells, the terminal uses alternative methods without requiring full network configuration, reducing processing time while maintaining sufficient accuracy for link recovery.
3Productivity
If the link recovery procedure is simplified for cells without downlink control channel monitoring, then the processing efficiency is improved, but the link recovery reliability may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the terminal determines whether downlink control channel monitoring is required based on cell characteristics, and accordingly adjusts its expectation of network-configured information. This feedback loop ensures that processing efficiency is optimized without compromising link recovery reliability, as the system adapts its behavior based on actual cell conditions.
Data Source
AI summary
Embodiments of the present disclosure provide a processing method and device for a link recovery procedure, and a terminal. The method comprises: a terminal determining that there is no need to monitor a downlink control channel on a first cell; and the terminal skipping a link recovery procedure, or the terminal determining a set of reference signals and executing, on the basis of the set of reference signals, a link recovery procedure.