Terminal Device Reference Signal Measurement Feedback for Layer Control
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Solution Overview
Problem
In New Radio (NR) systems, there is a challenge in implementing effective measurement and feedback of reference signals to support the transmission of multiple downlink channels, which can lead to excessive data flow layers exceeding the demodulation capability of user equipment (UE), resulting in resource waste and potential data discard.
Innovation Solution
A wireless communication method and device that enable UE to measure multiple reference signals, determine reporting information including a rank indicator (RI) for each signal, and transmit this information to the network side, ensuring that the number of supported layers does not exceed the UE's capability, thereby avoiding scheduling of excessive data flow layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmission nodes jointly transmit multiple downlink channels to a terminal device, then the system can improve transmission capacity and coverage, but the number of data flow layers may exceed the terminal device's demodulation capability, causing resource waste and data discard
Solution Approach 1:
The terminal device performs capability indication in advance, informing the network side of its maximum demodulation capability before actual data transmission. This preliminary action allows the network side to pre-plan the transmission configuration, ensuring that the total number of data flow layers from multiple transmission nodes does not exceed the terminal's capability, thus avoiding resource waste and data discard while maintaining high transmission capacity
2Productivity
If the network side schedules more data flow layers to increase throughput, then the transmission efficiency improves, but layers exceeding UE capability are discarded, leading to resource waste
Solution Approach 1:
The terminal device provides capability feedback to the network side, creating a closed-loop control system. The network side uses this feedback information to adjust the scheduling decisions, configuring the number of data flow layers to match the terminal's actual demodulation capability. This feedback mechanism ensures that transmission resources are fully utilized without exceeding processing limits, maximizing throughput while eliminating resource waste from discarded layers
Data Source
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AI summary
The embodiments of the application provide a wireless communication method and device, which may implement measurement and feedback of reference signals to support transmission of multiple downlink channels. The method includes that: a terminal device measures multiple reference signals; the terminal device determines reporting information corresponding to each reference signal of the multiple reference signals and including a Rank Indicator (RI) according to a measurement result; and the terminal device transmits the reporting information corresponding to each reference signal and including the RI to a network side.