Multi-Beam Downlink Control Signaling for Reliable TRP Transmission
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Solution Overview
Problem
Existing data transmission methods in new radio (NR) technology face reliability issues due to the use of single beam directions for downlink control signaling, particularly when multiple transmission reception points (TRPs) or panels are involved, leading to poor reliability and robustness.
Innovation Solution
Implementing a data transmission method that sends the same downlink control signaling using the same time domain resource on multiple beam directions with different frequency domain resources, allowing for retransmission across multiple TRPs/panels, and configuring new CORESET pool indexes and TCI states to manage these resources effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single beam direction is used for downlink control signaling, then device complexity is reduced, but reliability deteriorates
Solution Approach 1:
The patent segments the downlink control signaling transmission by dividing it into multiple transmission occasions across different beam directions. Each transmission occasion uses a separate beam direction and potentially different time-frequency resources, allowing the system to achieve diversity gain without requiring a completely new unified transmission structure. This segmentation approach resolves the contradiction by maintaining manageable complexity while improving reliability through multiple independent transmission paths.
Solution Approach 2:
The patent introduces additional dimensions to the transmission system by utilizing multiple beam directions (spatial dimension), multiple time occasions (time dimension), and potentially different frequency resources (frequency dimension). This multi-dimensional approach allows the system to transmit the same downlink control signaling through multiple independent paths, achieving reliability improvement without proportionally increasing device complexity through a fundamentally new transmission architecture.
2Reliability
If multiple beam directions are used for downlink control signaling, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the complex multi-beam transmission task into segmented transmission occasions, where each occasion uses a specific beam direction. This segmentation allows the system to manage complexity by handling one beam direction at a time while achieving overall reliability improvement through the combination of multiple segmented transmissions. The network device and terminal can process each beam direction independently rather than simultaneously managing all beams at once.
Solution Approach 2:
The patent employs periodic transmission of the same downlink control signaling across multiple beam directions in different transmission occasions. This periodic action pattern allows the system to reuse the same signaling content across multiple opportunities, reducing the need for complex real-time adaptation while achieving reliability through repeated transmissions. The periodic nature provides predictability that simplifies device complexity management.
3Reliability
If multiple TRPs/panels are used for transmission, then reliability is improved, but resource management complexity increases
Solution Approach 1:
The patent segments the resource management task by associating different transmission occasions with different TRPs or panels. Each TRP/panel can be independently configured and managed for specific transmission occasions, allowing the system to achieve diversity gain while managing complexity through independent resource pools. This segmentation enables straightforward resource allocation where each TRP/panel manages its own resources without requiring complex cross-TRP coordination.
Solution Approach 2:
The patent enables each TRP or panel to independently manage its own transmission resources and configurations without requiring centralized complex coordination. Each TRP/panel can autonomously handle its transmission occasions, reducing the overall resource management complexity while still achieving improved reliability through the combined effect of multiple independent TRPs/panels transmitting the same downlink control signaling.
Data Source
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AI summary
A data transmission method and a data transmission apparatus. The data transmission method is applied to a network device and comprises: configuring a plurality of different frequency domain resources, and configuring a same time domain resource for the plurality of different frequency domain resources; and sending, by means of the plurality of different frequency domain resources, a same downlink control signaling in multiple beam directions using the same time domain resource. By means of the present disclosure, repeated transmission of the same downlink control signaling can be achieved, and communication reliability can be improved.