Adaptive Beam Switch Timing for Aperiodic CSI-RS
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Solution Overview
Problem
User equipment (UE) experiences errors when attempting to apply increased aperiodic channel state information reference signal (CSI-RS) beam switch timing values due to conflicting conditions, such as high layer repetition parameter settings and the absence or presence of tracking reference signal (TRS) information, leading to performance degradation.
Innovation Solution
The UE and base station implement a method to transmit and receive first and second reported beam switch timing values, with the UE receiving downlink control information (DCI) associated with an aperiodic CSI-RS based on whether TRS information is configured and whether a repetition is associated with the aperiodic CSI-RS, allowing for the application of either increased or reduced beam switch timing values accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE applies the increased aperiodic CSI-RS beam switch timing value under conflicting conditions (high layer repetition parameter set as ON without TRS information, or high layer repetition parameter set as OFF with TRS information), then the beam switch timing is extended to improve measurement accuracy, but the UE generates errors and performance degrades
Solution Approach 1:
The patent applies parameter changes by dynamically selecting between different beam switch timing values (first and second reported beam switch timing values) based on the configuration parameters. When TRS information is configured, the UE uses the first beam switch timing value; when TRS information is not configured, the UE uses the second beam switch timing value. This resolves the contradiction by adapting the timing parameter to the specific operational conditions, preventing errors while maintaining measurement accuracy.
2Measurement precision
If the UE reports increased aperiodic CSI-RS beam switch timing values to improve beam switch timing, then measurement accuracy improves, but the complexity of condition evaluation and parameter selection increases
Solution Approach 1:
The patent applies local quality by treating different configuration scenarios (with TRS information vs. without TRS information) as distinct cases, each with its own appropriate beam switch timing value. This allows the UE to apply the most suitable timing parameter locally for each specific condition, simplifying the overall logic by handling each scenario separately rather than requiring complex unified evaluation.
3Speed
If the UE applies reduced beam switch timing values in certain conditions, then the communication speed increases, but the measurement accuracy may be compromised
Solution Approach 1:
The patent applies dynamics by making the beam switch timing value adaptive rather than fixed. The UE dynamically selects between different timing values based on real-time configuration parameters (TRS information and repetition parameter). This allows the system to optimize the timing value for each specific condition, balancing speed and accuracy requirements dynamically rather than using a static compromise value.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, a first reported beam switch timing value and a second reported beam switch timing value. The UE may receive downlink control information (DCI) associated with an aperiodic channel state information reference signal (CSI-RS). The UE may receive the aperiodic CSI-RS based at least in part on applying a beam indicated in the DCI in accordance with one of the first reported beam switch timing value or the second reported beam switch timing value being based at least in part on one or more of whether tracking reference signal (TRS) information is configured for the UE or whether a repetition is associated with the aperiodic CSI-RS. Numerous other aspects are provided.