TRP-Specific SRS Power Control Without Unified TCI State
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Solution Overview
Problem
Insufficient study on transmission power control for uplink transmission in future radio communication systems, particularly when simultaneous multi-panel UL transmission is supported and multiple TRPs are involved, leading to reduced communication throughput.
Innovation Solution
A terminal with a receiving section to receive information for transmission power control of multiple sounding reference signals (SRSs) using multiple TRPs and a control section to manage transmission power based on specific information for each TRP, even when a unified TCI state is not indicated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous multi-panel UL transmission using multiple TRPs is supported, then uplink throughput and reliability are improved, but transmission power control becomes insufficient leading to reduced communication throughput
Solution Approach 1:
The patent segments the transmission power control by dividing SRS resources into multiple groups, where each group is associated with a specific TRP. This allows independent power control for each TRP's SRS resources, resolving the insufficiency of unified power control in multi-TRP scenarios while maintaining improved uplink throughput through simultaneous multi-panel transmission.
2Device complexity
If a unified TCI state is not indicated for multiple TRPs, then device complexity is reduced, but transmission power control appropriateness deteriorates
Solution Approach 1:
The patent applies local quality by associating different SRS resource groups with different TRPs and applying TRP-specific power control parameters to each group. This allows appropriate transmission power control for each TRP without requiring complex unified TCI state indication, thus maintaining low device complexity while improving power control appropriateness.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3C
AI summary
A terminal according to one aspect of the present disclosure includes a receiving section that receives first information and second information for transmission power control of a plurality of sounding reference signals (SRSs) using a plurality of transmission/reception points (TRPs), and a control section that controls a transmission power of an SRS corresponding to a first TRP of the plurality of TRPs, based on the first information, and controls a transmission power of an SRS corresponding to a second TRP of the plurality of TRPs, based on the second information, when a unified Transmission Configuration Indication (TCI) state is not indicated. According to one aspect of the present disclosure, it is possible to appropriately perform transmission power control.