QCL Parameter Selection for Aperiodic CSI-RS Beam Conflicts
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Solution Overview
Problem
In wireless communication systems, determining a QCL parameter for receiving an aperiodic CSI-RS when its symbol is occupied by another downlink signal, particularly in scenarios involving multiple TRPs or antenna panels, is a key challenge.
Innovation Solution
A method involving the reception and transmission of information blocks and signals, where a first information block triggers a reference signal, and a second block determines the QCL parameter based on a first index, ensuring that signals from the same TRP or antenna panel are not received simultaneously to avoid conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple downlink signals are transmitted simultaneously on the same TRP or antenna panel, then signal transmission capacity is improved, but receiving beam conflicts occur causing reception failures
Solution Approach 1:
The patent implements dynamic receiving beam selection based on the timing relationship between triggering signaling and reference signals. When the time interval is less than a threshold, the UE dynamically selects the receiving beam used for another downlink signal; when the interval exceeds the threshold, a different receiving beam is selected. This dynamic adaptation allows simultaneous transmission of multiple downlink signals on the same TRP or antenna panel without receiving beam conflicts, resolving the contradiction between transmission capacity and reception reliability.
2Device complexity
If a unified solution is adopted for various transmission scenarios (downlink, uplink, sidelink), then system complexity is reduced, but scenario-specific optimization may be compromised
Solution Approach 1:
The patent employs a unified QCL parameter determination mechanism that applies across downlink, uplink, and sidelink scenarios. The core logic uses the time interval between triggering signaling and reference signals to determine QCL parameter relationships, providing a universal solution that reduces system design complexity while maintaining adaptability through scenario-specific parameter configurations.
Data Source
AI summary
The present application provides a method and device in a node used for wireless communications. A first node receives a first information block and a second information block; receives a first reference signal; and receives a first signal. The first information block is used to trigger a transmission of the first reference signal, a time interval between the first information block and the first reference signal is less than a first reference interval, and the first reference interval is a positive integer; the second information block is used to determine the first signal; the first reference signal and the first signal comprise a same multi-carrier symbol in time domain; the second information block is used to determine a first index, and the first index is used to determine whether a QCL parameter for receiving the first reference signal is related to a QCL parameter for receiving the first signal.