Terminal Device Downlink Signal Reception Scheme
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Solution Overview
Problem
In New Radio (NR) systems, terminal devices face challenges in simultaneously detecting multiple Downlink Control Information (DCI) within a time unit due to different receiving beams required for Physical Downlink Shared Channels (PDSCHs), leading to potential failure in demodulating multiple PDSCHs when their reference signals are not Quasi-Co-Located (QCL) or have different transmission configurations.
Innovation Solution
A terminal device determines the receiving scheme for multiple downlink signals based on transmission information, including schedule information, transmission configurations, and information carried in the signals, to prioritize and receive downlink signals with higher priority configurations, ensuring demodulation performance by selecting the appropriate receiving beams and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDSCHs are scheduled in the same detection window with different receiving beams, then downlink transmission throughput is increased, but the terminal device cannot simultaneously receive all PDSCHs using different receiving beams
Solution Approach 1:
The terminal device determines a receiving scheme in advance based on transmission information before actually receiving the PDSCHs. This preliminary determination of which PDSCHs to receive and under what conditions allows the terminal to prepare appropriate receiving configurations ahead of time, resolving the contradiction between wanting to receive multiple PDSCHs with different beams and the physical limitation of being able to simultaneously use multiple receiving beams.
Solution Approach 2:
The patent changes the parameter of receiving beam selection dynamically based on transmission configurations. By adjusting which receiving beam is used for which PDSCH according to the determined receiving scheme, the system can adapt to different transmission scenarios and maximize throughput while maintaining reliable reception, resolving the contradiction between throughput increase and reception reliability.
2Adaptability or versatility
If the terminal device uses different receiving beams for different PDSCHs, then the ability to receive multiple signals is improved, but the complexity of determining and switching between receiving schemes increases
Solution Approach 1:
The terminal device performs preliminary determination of the receiving scheme based on transmission information before actual signal reception. This advance planning simplifies the overall process by establishing the receiving strategy in advance, reducing the complexity of real-time decision-making when multiple PDSCHs need to be received with different beams.
Solution Approach 2:
The receiving scheme determination mechanism serves multiple functions: it identifies which PDSCHs to receive, determines the appropriate receiving beams, and establishes the timing for reception. This multi-functional approach reduces device complexity by consolidating multiple functions into a single determination process, while still maintaining the ability to handle diverse reception scenarios.
Data Source
AI summary
A method for transmitting a downlink signal comprises: determining, by a terminal device, that at least two downlink signals are to be received in a first detection window; determining, by the terminal device, a receiving scheme for the at least two downlink signals based on transmission information of the at least two downlink signals, wherein the transmission information includes at least one of scheduling information of the at least two downlink signals, transmission configuration of the at least two downlink signals, or information carried in the at least two downlink signals; and receiving, by the terminal device, at least one of the at least two downlink signals in the first detection window based on the receiving scheme for the at least two downlink signals.