Terminal Device Antenna Panel Selection for Signal Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications systems, particularly in new radio (NR) systems, terminal devices face challenges in selecting the appropriate antenna panel for signal transmission when instructed to transmit one or multiple signals, leading to potential signal collision and network performance issues due to the lack of clear protocols for antenna panel selection.
Innovation Solution
A signal transmission method where a terminal device selects an antenna panel based on configuration information, including priority, spatial relation, and quasi-co-location (QCL) information, to determine which signal to transmit and which panel to use, ensuring reliable signal transmission by inferring receive and transmit beamforming information from QCL and spatial feature parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal device has multiple antenna panels to support multiple beams, then the signal transmission capability and coverage are improved, but the complexity of selecting the appropriate antenna panel for signal transmission increases
Solution Approach 1:
The terminal device autonomously determines the appropriate antenna panel for signal transmission by evaluating spatial relation information and QCL parameters without requiring network device intervention. The device uses pre-configured spatial relations between reference signals and antenna panels to self-select the correct panel, thereby reducing signaling overhead and network complexity while maintaining adaptability.
Solution Approach 2:
The network device pre-configures spatial relation information and QCL parameters associating reference signals with specific antenna panels before actual signal transmission. This preliminary configuration enables the terminal device to quickly determine the appropriate panel during transmission without real-time decision-making complexity.
2Productivity
If the terminal device transmits multiple signals simultaneously, then the transmission efficiency is improved, but signal collision between different signals may occur
Solution Approach 1:
The terminal device segments multiple signals to be transmitted across different antenna panels based on spatial relation information. By associating each signal with a specific panel through QCL parameters, the device enables simultaneous transmission without collision, as each panel operates with its dedicated spatial relationship configuration.
3Measurement precision
If the terminal device uses QCL and spatial relation information to determine antenna panel selection, then the accuracy of beamforming is improved, but the amount of configuration information and processing requirements increase
Solution Approach 1:
The terminal device uses QCL and spatial relation information structures that serve multiple functions: they define the spatial relationship between reference signals and antenna panels, enable automatic panel selection, and provide beamforming parameters. This multi-functionality reduces the need for separate configuration messages while maintaining high beamforming accuracy.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
This application provides a signal transmission method and a communications apparatus. The method includes: receiving, by a terminal device, configuration information, where the configuration information is used to configure the terminal device to transmit M signals in a first time unit, the terminal device has N antenna panels, M is an integer greater than or equal to 1, and N is an integer greater than or equal to 2; and transmitting, by the terminal device, at least one of the M signals based on first information by using at least one of the N antenna panels. According to embodiments of this application, the terminal device can select a panel based on the first information and select a signal that needs to be transmitted. The embodiments of this application provide a solution of determining a signal that needs to be transmitted, and resolve a problem that a terminal device cannot select an antenna panel to transmit a signal when a transmission point instructs the terminal device to transmit one signal or simultaneously transmit a plurality of signals.