Configured Grant Uplink Control for Rank-Above-4 Antenna Ports
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Solution Overview
Problem
Existing communication systems face challenges in effectively controlling uplink transmission using more than four antenna ports, leading to suppressed communication throughput and decreased radio resource use efficiency.
Innovation Solution
A terminal and base station are designed to support configured grant-based transmission with more than four antenna ports by implementing specific configurations and controls, such as higher layer signaling and physical layer activation/deactivation signals, to manage CG PUSCH transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If configured grant-based transmission with rank larger than 4 is implemented, then communication throughput can be increased, but radio resource use efficiency decreases
Solution Approach 1:
The patent changes the transmission parameter (rank) from the conventional limit of 4 to larger values (5 or more), enabling higher throughput while implementing control mechanisms to manage resource efficiency. The base station configures specific rank values through higher layer signaling to optimize the balance between throughput and resource usage.
2Productivity
If more than four antenna ports are used for UL transmission, then spectra efficiency can be increased, but control complexity increases
Solution Approach 1:
The patent segments the control process into two distinct parts: higher layer signaling for configuring the maximum rank and antenna port parameters, and physical layer signaling for dynamic activation and deactivation of configured grants. This segmentation simplifies the overall control complexity by separating long-term configuration from short-term dynamic control.
Solution Approach 2:
The patent introduces dynamic activation and deactivation mechanisms for configured grants through physical layer downlink control information (DCI). This allows the system to adaptively enable or disable uplink transmissions based on current channel conditions and resource availability, managing complexity through dynamic rather than static control.
Data Source
Figure 1A~1D
Figure 2
Figure 3A~3B
AI summary
To appropriately control UL transmission using more than four antenna ports. A terminal according to an aspect of the present disclosure includes a receiving section that receives configuration information for a configured grant transmission regarding a rank larger than 4, and a transmitting section that performs the configured grant transmission, based on the configuration information.