Beam Type Signaling for Simultaneous Multi-TRP Downlink Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In beam-based communication systems, particularly in high-frequency environments, terminal devices face challenges in simultaneously receiving downlink signals from multiple transmission reception points (TRPs) due to inconsistent beam selection policies, leading to suboptimal data receiving throughput.
Innovation Solution
A signal transmission method that involves indicating specific beam types for a terminal device to simultaneously receive signals from different directions, using various signaling mechanisms such as MAC CE, DCI, and TCI configurations, to establish a consistent understanding between the network device and the terminal device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the terminal device uses beam-based communication to receive downlink signals, then the antenna gain is improved, but the terminal device cannot simultaneously receive signals from multiple TRPs due to beam selection policy inconsistencies
Solution Approach 1:
The patent introduces dynamic beam switching mechanisms where the terminal device can switch between different beam selection policies based on network device indications. The terminal device dynamically adjusts its receive beam configuration to accommodate simultaneous reception from multiple TRPs while maintaining optimal antenna gain through coordinated beam management.
Solution Approach 2:
The patent changes the beam selection parameter from a static single-beam policy to a dynamic multi-beam policy. By introducing beam type indicators (first beam type for simultaneous reception, second beam type for single reception) and allowing parameter switching based on network conditions, the system achieves both high gain and multi-TRP adaptability.
2Measurement precision
If the terminal device selects beams for optimal single-signal reception, then the reception quality is improved, but the terminal device cannot establish consistent understanding with the network device for simultaneous multi-TRP reception
Solution Approach 1:
The patent implements feedback mechanisms where the terminal device reports its beam selection capabilities and preferences to the network device. The network device uses this feedback to provide beam type indications that ensure both devices have consistent understanding of the intended reception mode, preventing information loss in beam coordination.
Solution Approach 2:
The patent introduces beam type indication information as an intermediary element that mediates between the terminal device's optimal reception requirements and the network device's multi-TRP transmission intentions. This intermediary ensures consistent understanding by providing explicit guidance on which beam selection policy to apply.
3Productivity
If the terminal device receives signals from multiple directions simultaneously, then the data receiving throughput is improved, but the beam selection complexity increases
Solution Approach 1:
The patent segments the beam selection process into distinct beam types (first beam type for simultaneous multi-TRP reception, second beam type for single-TRP reception). This segmentation simplifies the overall complexity by providing clear, predefined beam selection categories that the terminal device can follow based on network indications, rather than requiring complex real-time optimization.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This application provides a signal transmission method and a communication apparatus. The method includes: indicating a beam type used for a terminal device to receive a first downlink signal and/or a second downlink signal, where a time domain resource of the first downlink signal overlaps a time domain resource of the second downlink signal, the beam type includes a first beam type or a second beam type, the first beam type indicates: a first beam used when the terminal device can simultaneously receive a first reference signal and a second reference signal, and/or a second beam used when the terminal device can simultaneously receive the first reference signal and the second reference signal, and the second beam type indicates: a beam used when the terminal device can receive the first reference signal, and/or a beam used when the terminal device can receive the second reference signal. According to the method provided in this application, a network device indicates the terminal device to simultaneously receive a plurality of signals, thereby improving a data throughput and improving performance of the terminal device.