PUCCH Beam Recovery Across Primary and Secondary Cells
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Solution Overview
Problem
In high-frequency communications systems, beam failure events lead to time-consuming radio link reestablishment, and determining beam information for the physical uplink control channel (PUCCH) in multi-carrier scenarios is challenging during beam failure recovery.
Innovation Solution
A method for PUCCH transmission and reception that utilizes determined spatial relation information to ensure consistent beam information between the terminal and network-side device, particularly in scenarios involving primary and secondary cells, by transmitting or receiving PUCCH after a beam failure recovery request message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio link reestablishment is performed in the related art, then connection reliability is restored, but time consumption increases significantly
Solution Approach 1:
The patent introduces a beam failure recovery mechanism that performs preliminary beam failure detection and recovery request transmission before complete link failure occurs. The terminal monitors beam quality using reference signals, and when beam failure is detected, it proactively sends a recovery request message to trigger faster recovery procedures, avoiding the need for time-consuming radio link reestablishment
Solution Approach 2:
The patent introduces a beam failure recovery mechanism as an intermediary process between normal communication and full radio link reestablishment. This mechanism uses specific beam failure detection reference signals and recovery request procedures to mediate the recovery process, enabling faster restoration of communication without requiring complete link reestablishment
2Reliability
If beam failure recovery procedure is performed in multi-carrier scenario, then communication continuity is maintained, but beam information determination complexity increases
Solution Approach 1:
The patent segments the beam failure recovery process into distinct phases: beam failure detection using specific reference signals, recovery request transmission on designated uplink resources, and spatial relation information determination for different cell types. This segmentation allows the system to handle primary and secondary cells separately with appropriate spatial relation configurations, reducing overall complexity
Solution Approach 2:
The patent applies different spatial relation information determination methods to different cell types within the multi-carrier system. Primary cells use one determination approach while secondary cells use another, allowing each cell type to be optimized independently according to its specific requirements, thereby managing complexity through localized solutions
Data Source
AI summary
Embodiments of this disclosure provide a method for PUCCH transmission, a method for PUCCH reception, a terminal, and a network side device. The method for PUCCH transmission is applied to the terminal and includes: transmitting a first PUCCH of at least one cell by using determined spatial relation information after transmitting a beam failure recovery request message to a network side, where the at least one cell includes: a primary cell and at least one secondary cell, or at least one secondary cell.