Beam Failure Recovery Priority Between Primary and Secondary Cells
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Solution Overview
Problem
Existing wireless communication systems lack a solution for beam recovery when beam failures occur in both a primary cell and a secondary cell, leading to communication disruptions and increased power consumption.
Innovation Solution
A method is provided to suspend or terminate the beam failure recovery procedure of a secondary cell before successful recovery of a primary cell, allowing preferential recovery of the primary cell, thereby minimizing impact from multiple cell failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure recovery procedures are performed for both primary cell and secondary cell simultaneously, then communication reliability is improved, but power consumption increases and recovery latency increases
Solution Approach 1:
The patent segments the beam failure recovery process into two distinct phases: first recovering the primary cell, then recovering the secondary cell. This segmentation allows the system to prioritize critical communications while managing power consumption in a controlled manner, rather than attempting simultaneous recovery of all cells which would consume excessive power.
Solution Approach 2:
The patent applies preliminary action by suspending the secondary cell recovery procedure before the primary cell recovery is complete. This ensures that the primary cell, which carries critical control signaling, is recovered first with higher priority, and only after its recovery is confirmed does the system proceed with secondary cell recovery, thereby optimizing power usage.
2Reliability
If beam failure recovery procedures are performed for both primary cell and secondary cell simultaneously, then communication reliability is improved, but recovery time increases
Solution Approach 1:
The recovery process is segmented into sequential phases rather than parallel execution. By dividing the recovery into primary cell recovery followed by secondary cell recovery, the system reduces overall recovery time while maintaining reliability, as simultaneous recovery of all cells would create resource contention and extend total recovery duration.
Solution Approach 2:
The patent performs preliminary recovery of the primary cell before initiating secondary cell recovery. This preliminary action ensures that critical control channels are restored first, enabling the system to then proceed with data-bearing secondary cell recovery, thereby optimizing the overall recovery timeline while ensuring communication reliability.
3Use of energy by moving object
If beam failure recovery procedure of secondary cell is suspended, then power consumption is reduced, but secondary cell recovery is delayed
Solution Approach 1:
The patent applies preliminary action by completing primary cell recovery before resuming secondary cell recovery. This approach accepts a controlled delay in secondary cell recovery as a necessary preliminary step to ensure primary cell stability, thereby reducing overall power consumption while managing the time delay in a systematic manner.
Data Source
AI summary
Embodiments of this application provide a beam failure processing method and apparatus. The method includes: When a beam failure of a first cell is determined, if a beam failure of a second cell is further determined before beam failure recovery of the first cell succeeds, preferentially perform beam recovery of a primary cell in the first cell and the second cell. The first cell is the primary cell and the second cell is the secondary cell, or the first cell is the secondary cell and the second cell is the primary cell. It can be learned from the foregoing process that when beam failures occur in both the primary cell and the secondary cell, this application can ensure that communication of the primary cell is preferentially recovered to be normal, thereby minimizing impact caused by beam failures of a plurality of cells.