Beam Failure Detection Resource Configuration in 5G Multi-TRP Networks
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Solution Overview
Problem
Current beam failure detection methods in cellular communication networks, particularly in 5G radio access technology, lack efficient configurations for multi-TRP scenarios, requiring complex higher-layer signaling and struggling with implicit BFD-RS configuration.
Innovation Solution
The method involves configuring user equipment with multiple Transmission Configuration Indication (TCI) states for each control resource set, allowing downlink reference signals to be selectively included in specific Beam Failure Detection (BFD) resources, enabling efficient BFD monitoring without requiring higher-layer signaling, especially in Single Downlink Control Information (S-DCI) based multi-TRP operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple TCI states are configured for multi-TRP scenarios, then beam failure detection accuracy is improved, but signaling complexity increases
Solution Approach 1:
The user equipment autonomously determines and configures BFD resources based on TCI state configurations received from the network. The UE self-manages the mapping between TCI states and BFD reference signals without requiring additional higher-layer signaling, reducing signaling complexity while maintaining multi-TRP detection capability
Solution Approach 2:
The patent divides BFD resources into multiple sets, with each set associated with specific TCI states. This segmentation allows the UE to independently manage BFD resources for different TRPs, improving detection accuracy while avoiding the need for complex unified signaling across all TRPs
2Loss of energy
If autonomous BFD resource management is implemented, then signaling overhead is reduced, but configuration complexity increases
Solution Approach 1:
The network pre-configures TCI states with associated BFD reference signal information before beam failure detection is needed. The UE stores these configurations and automatically applies them when monitoring BFD, eliminating the need for real-time signaling and reducing signaling overhead
Solution Approach 2:
The TCI state configuration structure is designed to serve multiple purposes: it provides beam indication for downlink reception and simultaneously defines BFD resource configurations. This multi-functionality reduces the need for separate dedicated BFD signaling, lowering signaling overhead while managing configuration complexity through a unified structure
Data Source
AI summary
According to an example aspect of the present disclosure, there is provided a method comprising determining, by a user equipment, that the user equipment is configured or activated with at least two Transmission Configuration Indication, TCI, states for one control resource set, with at least two linked search space sets and one TCI state for each of the linked search space sets or with at least two TCI states for Physical Downlink Shared Channel, PDSCH, reception, wherein the at least two TCI states comprise a first TCI state and a second TCI state, determining, by the user equipment, that a downlink reference signal indicated by the first TCI state is to be included to a first set of Beam Failure Detection, BFD, resources and a downlink reference signal indicated by the second TCI state is to be included to a second set of BFD resources and including, by the user equipment, the downlink reference signal indicated by the first TCI state to the first set of BFD resources and the downlink reference signal indicated by the second TCI state to the second set of BFD resources.