Terminal and Base Station Control for Multi-Panel PUSCH Switching
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Solution Overview
Problem
In future radio communication systems, the control of simultaneous transmission using multiple panels for uplink transmission is not sufficiently studied, leading to potential degradation in system performance such as throughput reduction, particularly in applying SRI and TPMI fields for codebook-based and non-codebook-based physical downlink shared channels.
Innovation Solution
A terminal and base station are designed to dynamically switch between multi-panel simultaneous transmission space division multiplexing and single-panel transmission, with appropriate application of SRI and TPMI fields through downlink control information, ensuring clear indication and configuration for multi-panel operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic switching between multi-panel simultaneous transmission SDM scheme and single-panel transmission is implemented, then system performance and throughput are improved, but control complexity and difficulty of detecting and measuring transmission scheme increases
Solution Approach 1:
The patent implements dynamic switching between multi-panel simultaneous transmission SDM scheme and single-panel transmission scheme based on channel conditions and transmission requirements. The transmission scheme is not fixed but can be dynamically adjusted, allowing the system to optimize throughput by selecting the appropriate scheme while managing control complexity through adaptive decision-making.
Solution Approach 2:
The patent segments the transmission control into distinct components: SRI fields for indicating SRS resources and TPMI fields for indicating precoding matrices. Each field is separately configured and interpreted based on the active transmission scheme, allowing independent optimization and simplifying the overall control structure despite the dynamic switching capability.
2Productivity
If multi-panel simultaneous transmission SDM scheme is used, then data rate and system performance are improved, but reliability of correct interpretation of control fields decreases
Solution Approach 1:
The patent applies different interpretation rules for SRI and TPMI fields depending on the active transmission scheme. When multi-panel SDM is active, the fields are interpreted according to multi-panel rules; when single-panel transmission is active, different interpretation rules apply. This local adaptation of field interpretation rules ensures reliable decoding regardless of the transmission scheme being used.
Solution Approach 2:
The patent introduces scheme indication information as an intermediary that mediates between the physical layer transmission and the higher layer interpretation of control fields. This intermediary provides the necessary context for correctly interpreting SRI and TPMI fields, ensuring that the terminal can reliably determine which interpretation rules to apply based on the current transmission scheme.
3Reliability
If clear indication and configuration for multi-panel operations is implemented, then reliability and throughput are improved, but device complexity increases
Solution Approach 1:
The patent designs the SRI and TPMI fields to serve multiple functions depending on the transmission scheme. The same field structures are used for both multi-panel simultaneous transmission and single-panel transmission, but their interpretation varies based on the active scheme. This multi-functionality reduces the need for separate control mechanisms for different transmission modes, thereby limiting the increase in terminal complexity while maintaining reliability.
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3C
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section to which, for a non-codebook based physical downlink shared channel (PUSCH), dynamic switching between a first scheme using multi-panel simultaneous transmission space division multiplexing (SDM) and a second scheme with transmission of the PUSCH associated with one panel is applied, the receiving section being configured to receive an indication indicating the second scheme, and a control section that applies a first sounding reference signal (SRS) resource indicator (SRI) field in downlink control information (DCI). According to one aspect of the present disclosure, it is possible to appropriately apply at least one of an SRI field and a TPMI field.