Non-Serving Cell Beam Failure Recovery via Candidate List Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently monitoring link quality and managing beam failures on non-serving cells, leading to suboptimal performance and resource wastage due to unsuitable candidate cells being activated.
Innovation Solution
The method involves configuring user equipment (UE) to monitor reference signals from non-serving cells using provided configuration information, transmitting channel quality indicators, and adjusting candidate cell lists based on failure detection, thereby optimizing resource allocation and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors and manages beam failures on non-serving cells, then beam management efficiency and link quality are improved, but device complexity and computing resource consumption increase
Solution Approach 1:
The patent segments the cell management functionality by distinguishing between serving cells and non-serving cells. The UE selectively performs beam failure detection and recovery operations only on non-serving cells that are configured as candidate cells, rather than uniformly across all cells. This segmentation allows the system to improve beam management reliability for critical non-serving cells while avoiding unnecessary computing resource consumption on cells that do not require such intensive monitoring.
Solution Approach 2:
The patent applies local quality by configuring different monitoring and management strategies for different cells based on their roles. Non-serving cells that are identified as candidate cells receive enhanced monitoring (beam failure detection, reference signal monitoring) while other cells use standard procedures. This localized enhancement improves beam management efficiency where needed without uniformly increasing device complexity across all cell management operations.
2Reliability
If the UE activates more candidate cells for monitoring, then link quality and service reliability are improved, but resource wastage and overhead increase
Solution Approach 1:
The patent implements preliminary action by pre-configuring a list of candidate non-serving cells before beam failure occurs. The network provides configuration information identifying which non-serving cells should be monitored as candidates. This preliminary identification allows the UE to prepare monitoring resources in advance for only those cells likely to become serving cells, improving link quality readiness while avoiding the energy wastage of monitoring all non-serving cells uniformly.
Solution Approach 2:
The patent applies partial action by having the UE perform beam failure detection and recovery operations on a subset of non-serving cells (those configured as candidate cells) rather than all non-serving cells. This partial monitoring approach provides sufficient reliability for cells that may become serving cells while reducing resource consumption compared to exhaustive monitoring of all possible cells.
3Reliability
If the UE performs comprehensive beam failure detection on non-serving cells, then service continuity is improved, but latency and processing overhead increase
Solution Approach 1:
The patent extracts the beam failure detection and recovery functionality specifically for non-serving candidate cells, separating it from the standard serving cell management procedures. By taking out this enhanced monitoring capability and applying it selectively to non-serving cells, the system improves service continuity for potential handover targets without adding latency to the main serving cell operations. The UE can process non-serving cell monitoring independently and in parallel with serving cell operations.
Solution Approach 2:
The patent uses preliminary action by pre-identifying candidate non-serving cells and pre-configuring their monitoring parameters before beam failure occurs. This advance preparation allows the UE to quickly detect and respond to beam failures on these cells without incurring additional processing latency during actual failure events, thereby improving service continuity while minimizing time loss.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information associated with monitoring link quality on a non-serving cell of the UE, wherein the configuration information includes at least one of: information indicating a reference signal resource associated with the non-serving cell, or information indicating an uplink resource associated with the non-serving cell; monitor a reference signal of the non-serving cell based at least in part on the configuration information; and transmit, to a serving cell using the uplink resource, a channel quality indicator associated with the non-serving cell based at least in part on the monitoring. Numerous other aspects are provided.