CORESET 0 Beam Management in Multi-TRP Wireless Systems
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Solution Overview
Problem
The extension of beam failure detection and recovery mechanisms to multiple Transmitter Receiver Points (TRPs) in NR R16 systems poses challenges in determining which Control Resource Sets (CORESETs) need to be updated with new beams after recovery, particularly regarding the Transmission Configuration Indicator (TCI) states, especially for CORESETs with index 0, leading to complexity and potential reliability issues.
Innovation Solution
A method is introduced where the type of channel occupied by the signal indicating the recovered new beam determines which TCI states of CORESETs need to be updated, ensuring optimal operation for specific CORESETs like those with index 0, and reduces unnecessary updates to minimize system complexity and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure detection and recovery mechanisms are extended to multiple TRPs, then transmission reliability is improved, but system complexity increases due to determining which CORESETs need TCI state updates
Solution Approach 1:
The patent applies local quality by differentiating the treatment of CORESETs based on their specific characteristics (index 0 vs. other indices). CORESETs with index 0 maintain their existing TCI states without updates, while other CORESETs update their TCI states to the new beam. This localized differentiation resolves the complexity of determining which CORESETs need updates while ensuring transmission reliability for all CORESETs.
2Reliability
If TCI states of all CORESETs are updated with new beams after recovery, then communication quality is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the update operation from being applied universally to all CORESETs and selectively applies it only to necessary CORESETs (those with index not equal to 0). By taking out the unnecessary updates for CORESETs with index 0, the patent reduces signaling overhead while maintaining communication quality for the CORESETs that actually require updates.
3Reliability
If beam management is performed per TRP, then transmission reliability is improved, but processing complexity increases for determining TCI state updates
Solution Approach 1:
The patent applies local quality by making the beam management and TCI state update decisions specific to each CORESET's characteristics. Instead of a uniform processing approach for all CORESETs, the patent locally adapts the update behavior based on the CORESET index, thereby reducing processing complexity while maintaining per-TRP transmission reliability.
Data Source
AI summary
A first node transmits a first signal; and receives a first signaling; and monitors a first-type channel in a first resource subset with same spatial parameters as a target reference signal after first time. The first signal is used to indicate a first reference signal; the first signaling is used to determine the first time; the first reference signal is one of M reference signals; whether the target reference signal is the first reference signal is related to type(s) of channel(s) carrying the first signal; when the type(s) of the channel(s) carrying the first signal includes a first type, the target reference signal is the first reference signal; otherwise, whether the target reference signal is the first reference signal is related to the first reference signal. The method ensures that a specific CORESET, e.g. CORESET 0, always works at the optimal beam in multi-TRP scenarios.