UE Beam Sweeping with QCL-Based Rx Beam Prioritization
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Solution Overview
Problem
In 5G or NR networks, beam sweeping procedures for determining the best receive (Rx) beam of user equipment (UE) can be inefficient due to sub-optimal Rx beams being used, leading to wasted measurement resources, increased power consumption, and reduced throughput.
Innovation Solution
The UE autonomously adjusts the number of Rx beams and SMTC occasions based on quasi-co-located (QCLed) resources, prioritizes Rx beams, and configures measurement periods to improve measurement quality and conserve resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam sweeping procedures use all configured Rx beams for measurements, then measurement coverage is complete, but power consumption increases and measurement resources are wasted
Solution Approach 1:
The patent applies partial action by selecting only a subset of Rx beams for measurement based on TCI state link information, rather than using all configured beams. This reduces the measurement set to only those beams that are actually needed for determining the best Rx beam, thereby reducing power consumption while maintaining measurement effectiveness
Solution Approach 2:
The patent applies local quality by differentiating the treatment of different Rx beams based on their TCI state link information. Not all beams are treated equally - only beams with relevant TCI state information are selected for measurement, optimizing the measurement process for each specific beam's characteristics and requirements
2Measurement precision
If beam sweeping procedures use all configured Rx beams, then measurement completeness is maintained, but measurement time increases and throughput decreases
Solution Approach 1:
The patent reduces the measurement set to only necessary beams based on TCI state link information, avoiding unnecessary measurements on beams that won't contribute to finding the optimal Rx beam. This partial measurement approach maintains measurement completeness for relevant beams while significantly reducing total measurement time and improving throughput
Solution Approach 2:
The patent performs preliminary filtering of Rx beams based on TCI state link information before actual measurement. This preliminary action identifies which beams need to be measured and which can be excluded, optimizing the measurement process and reducing overall measurement time
3Adaptability or versatility
If the UE performs autonomous beam selection without QCLed information, then measurement flexibility is maintained, but measurement efficiency decreases
Solution Approach 1:
The patent introduces TCI state link information as an intermediary element that connects the UE's beam selection process with network configuration. This intermediary provides the UE with knowledge about which Rx beams have corresponding TCI states, enabling efficient autonomous selection without sacrificing flexibility
Solution Approach 2:
The patent implements a feedback mechanism where the UE uses TCI state link information to guide its beam selection, and subsequently reports measurement results back to the network. This feedback loop enables the system to optimize beam selection based on actual measurement conditions while maintaining flexibility
Data Source
AI summary
Techniques discussed herein can facilitate enhanced radio resource management measurements for wireless technology including New Radio (NR). One example aspect is a baseband processor of a user equipment (UE), including one or more processors configured to receive a measurement link information state link information. The one or more processors are further configured to determine, from the measurement link information, a number of synchronization signal block based measurement timing configurations (SMTCs) (Y) per Rx beam of a number of receive (Rx) beams (N); generate at least one of a subset number of Rx beams (NUE) of the number of Rx beams based on the measurement link information, or an increased number of SMTCs (YUE) of the number of SMTCs corresponding to the number of Rx beams; and perform radio resource management (RRM) measurements according to one or more of the subset number of Rx beams or the increased number of SMTCs.