Beam Indication Signaling for 5G Multi-Beam Throughput
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Solution Overview
Problem
In 5G NR systems, the joint transmission technology for multipoint transmission is not optimized due to limitations in information exchange capacity between cells, affecting the throughput of edge users and the signal-to-interference-plus-noise ratio in multi-beam scenarios.
Innovation Solution
A data transmission method where a transmitting device sends beam indication information to a receiving device, allowing it to select the most suitable receive beam, which includes determining and transmitting beam indication information using single-layer or double-layer signaling structures, and optionally including quasi co-location (QCL) information and mapping relationships between transmit beams, receive beams, and transport layers to enhance signal reception from multiple beam directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If joint transmission technology is used for multipoint transmission, then throughput of edge users is improved, but information exchange capacity between cells becomes a limiting factor
Solution Approach 1:
The patent segments the beam indication information into different signaling layers (single-layer or double-layer structures). In double-layer signaling, data link layer indication signaling indicates a beam set while physical layer indication signaling indicates a specific beam within that set. This segmentation allows efficient transmission of beam information without overwhelming the information exchange capacity between cells.
2Measurement precision
If beam indication information is transmitted using detailed signaling, then receiving device can select optimal receive beam, but signaling complexity increases
Solution Approach 1:
The patent implements dynamic beam indication through two signaling structures. The single-layer structure provides quick indication for dynamic scenarios, while the double-layer structure provides precise indication when needed. The system can dynamically switch between these structures based on channel conditions and requirements, optimizing both precision and complexity.
Solution Approach 2:
The patent adds a hierarchical dimension to beam indication by introducing double-layer signaling. Instead of transmitting all beam information in a single layer, it creates two levels: data link layer for beam set indication and physical layer for specific beam indication. This dimensional change reduces the information burden on any single signaling channel.
3Area of stationary object
If multiple transmit beams are used for data transmission, then signal coverage is improved, but interference between beams increases
Solution Approach 1:
The patent employs feedback mechanisms where the receiving device measures signals from multiple beams and provides feedback to the transmitting device. Based on this feedback, the transmitting device can adjust beamforming weights and power allocation to maximize signal coverage while minimizing interference between concurrent beams through iterative optimization.
Data Source
AI summary
A data transmission method, a transmitting device, and a receiving device are disclosed. The method is applicable to a wireless communications system including a plurality of beams, and includes: determining, by a transmitting device, beam indication information and at least one transmit beam used for sending data to a receiving device; sending, by the transmitting device, the beam indication information to the receiving device; and transmitting, by the transmitting device, the data by using the at least one transmit beam. The transmitting device sends the beam indication information to indicate, to the receiving device, a corresponding receive beam used for receiving the data transmitted by the transmitting device.