UE Beam Selection Across Multiple TRPs for Reliable Links
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Solution Overview
Problem
Existing beam management techniques in multi-TRP networks face challenges in efficiently acquiring and maintaining optimal beam connections between user equipment (UE) and multiple transmission reception points (TRPs), particularly in scenarios where beam failure detection and recovery are necessary.
Innovation Solution
Implementing beam management techniques on both the UE side and network side, including beam reporting, beam failure detection, and recovery procedures, which involve selecting and transmitting messages indicating the selected beams for multiple TRPs, using reference signals and coordinated beam management strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam management techniques are implemented on both UE side and network side for multi-TRP operation, then beam selection accuracy and communication reliability are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments beam management by introducing separate beam reporting mechanisms for different TRPs. The UE independently evaluates reference signals from multiple TRPs and reports beam quality metrics for each TRP separately, allowing granular beam management without requiring complex centralized control across all TRPs simultaneously.
Solution Approach 2:
The patent implements preliminary beam failure detection by continuously monitoring reference signal quality from multiple TRPs before actual beam failure occurs. The UE proactively identifies deteriorating beam conditions and triggers recovery procedures in advance, preventing complete connection loss and reducing the complexity of emergency recovery scenarios.
2Measurement precision
If multiple reference signals are received and evaluated from different TRPs, then beam selection precision is improved, but processing time and signaling overhead increase
Solution Approach 1:
The patent applies partial action by having the UE evaluate and report only the most relevant beam metrics for each TRP rather than exhaustive measurements of all possible parameters. The UE identifies and reports sufficient beam quality indicators to enable effective beam management without performing unnecessary complete measurements on all reference signals from all TRPs.
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports beam quality measurements back to the network, and the network uses this feedback to adjust beam configurations and reference signal transmissions. This closed-loop feedback system enables precise beam selection over time while reducing the need for exhaustive measurements in each individual reporting cycle.
Data Source
AI summary
A user equipment (UE) reports beam management information to a network. The UE receives a first group of multiple reference signals from a first transmission reception point (TRP) of a network, receives a second group of multiple reference signals from a second different TRP of the network, selects a first beam associated with one of the multiple reference signals of the first group, selects a second beam associated with one of the multiple reference signals of the second group and transmits a message to the network, the message including an indication of the selected first beam and second beam.