Multi-Cell PUCCH Beam Recovery Using Spatial Relations
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Solution Overview
Problem
In high-frequency communications systems, determining beam information for a physical uplink control channel (PUCCH) in multiple cells during a beam failure event is challenging, leading to time-consuming radio link reestablishment.
Innovation Solution
A method for PUCCH transmission and reception that utilizes determined spatial relation information after a beam failure recovery request message is transmitted or received, ensuring consistent beam information between the terminal and network-side device for PUCCH in primary and secondary cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio link reestablishment is performed in the related art, then connection reliability is restored, but the process is time-consuming and causes service interruption
Solution Approach 1:
The patent applies preliminary action by pre-configuring spatial relation information for PUCCH transmission before beam failure occurs. When beam failure is detected, the terminal can immediately use the pre-configured spatial relation information to transmit recovery requests and maintain uplink control channel functionality, avoiding the time-consuming process of establishing new beam relationships during reestablishment.
2Productivity
If beam failure recovery mechanism is not implemented, then system complexity is reduced, but service continuity is interrupted during beam failure events
Solution Approach 1:
The patent implements self-service by enabling the terminal to autonomously determine and apply spatial relation information for PUCCH transmission during beam failure recovery. The terminal uses pre-configured spatial relation information from the network to self-manage the recovery process without requiring complex network-side intervention or coordination, thereby maintaining service continuity with minimal added complexity.
3Reliability
If spatial relation information is not determined for PUCCH during beam failure recovery, then signaling overhead is reduced, but PUCCH transmission reliability deteriorates
Solution Approach 1:
The network pre-configures spatial relation information for PUCCH transmission before beam failure occurs. This preliminary configuration ensures that when beam failure is detected, the terminal immediately has the necessary spatial relation information to reliably transmit recovery requests and maintain control channel functionality, avoiding the need for additional signaling during the critical recovery period.
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.