Beam Failure Detection Reference Signal Configuration in Multi-TRP Systems
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Solution Overview
Problem
Current 5G wireless systems face limitations in inter-cell multi-TRP operation and beam failure detection, particularly in supporting multiple control resource sets and beam management, which affects the reliability and robustness of PDCCH, PUSCH, and PUCCH transmissions.
Innovation Solution
The proposed solution involves user equipment (UE) receiving periodic channel state information reference signal resource configuration indexes from a network entity to determine failure detection resources, including transmission configuration indication states for reference signal indices associated with control resource sets, enabling enhanced beam failure detection and multi-TRP operations through explicit and implicit configuration of beam failure detection reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inter-cell multi-TRP operation is implemented to enhance system capacity and reliability, then the number of supported control resource sets increases, but beam failure detection becomes more complex and difficult to manage
Solution Approach 1:
The patent segments beam failure detection by introducing separate failure detection reference signal (FD-RS) resources for each transmission reception point (TRP). This allows independent monitoring of beam failures for each TRP, simplifying the detection process in multi-TRP scenarios while supporting multiple control resource sets.
Solution Approach 2:
The patent configures beam failure detection reference signals in advance through higher layer parameters before beam failures occur. This preliminary configuration enables the system to prepare detection resources proactively, reducing the complexity of real-time beam failure detection in inter-cell multi-TRP operations.
2Measurement precision
If explicit configuration of beam failure detection reference signals is used, then detection accuracy improves, but system complexity and configuration overhead increase
Solution Approach 1:
The patent implements a dynamic configuration approach where beam failure detection reference signals can be configured through higher layer parameters with flexible parameters such as periodicity, resource allocation, and association with control resource sets. This dynamic configuration maintains detection accuracy while adapting to different system scenarios and reducing unnecessary complexity.
3Device complexity
If implicit configuration of beam failure detection reference signals is used, then configuration overhead is reduced, but detection reliability may be compromised
Solution Approach 1:
The patent introduces higher layer parameters as an intermediary between explicit and implicit configuration approaches. These parameters provide a middle ground by allowing semi-configurable beam failure detection reference signals that reduce overhead while maintaining sufficient reliability for beam failure detection in multi-TRP operations.
Data Source
AI summary
According to certain embodiments, an apparatus and method may include receiving, by a user equipment, at least one set of periodic channel state information reference signal (CSI-RS) resource configuration index from at least one network entity (201), determining at least one predetermined index not received from the at least one network entity (203), determining at least one set of periodic CSI-RS resource configuration indexes with same values as the RS indexes in the RS sets (205), and performing at least one beam failure detection procedure (207).