PUSCH Power Control via SRI Association for Flexible Beam Updating
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Solution Overview
Problem
The existing mechanism for determining transmitting parameters of uplink transmission in new radio (NR) technology is not perfect, particularly in high frequency bands, leading to issues with beam pair variations and increased signaling overhead due to flexible beam updating.
Innovation Solution
A method for determining transmitting parameters of uplink transmission by associating sounding reference signal resources with pathloss measurement parameters, using MAC CE to update spatial relations and power control parameters for CC groups, optimizing the parameter determination process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam pair updating mechanism is made flexible to adapt to time-varying positions, then beam accuracy and coverage are improved, but signaling overhead increases
Solution Approach 1:
The patent segments the beam management process by introducing separate reference signals (CSI-RS for downlink, SRS for uplink) that can be independently configured and updated. This allows the system to update beam parameters selectively rather than through comprehensive MAC CE signaling, reducing overhead while maintaining accuracy.
Solution Approach 2:
The patent performs preliminary beam training and reference signal configuration before actual data transmission. By pre-establishing beam pairs and their associations through RRC signaling and physical layer references, the system avoids the need for frequent MAC CE updates during operation, thereby reducing signaling overhead.
2Adaptability or versatility
If MAC CE signaling is used to update transmitting parameters, then beam updating flexibility is achieved, but the mechanism becomes complex and inefficient
Solution Approach 1:
The patent replaces the MAC CE-based mechanical signaling mechanism with a more efficient physical layer mechanism. By using SRI fields in DCI and associating them with pre-configured reference signals, the system achieves beam updating flexibility through simpler, faster physical layer signaling rather than higher-layer MAC protocols.
Solution Approach 2:
The patent creates a universal reference signal framework where CSI-RS and SRS can serve multiple functions: beam training, beam refinement, and as references for pathloss measurement. This multi-functionality eliminates the need for separate dedicated signaling mechanisms, simplifying the overall system while maintaining flexibility.
3Measurement precision
If association between SRI and pathloss measurement parameter is established, then power control accuracy is improved, but configuration complexity increases
Solution Approach 1:
The patent merges the beam identification function (SRI) with the pathloss measurement reference function by associating SRI values with specific CSI-RS or SRS resources. This consolidation allows the same reference signal to serve dual purposes, improving power control accuracy without requiring separate configuration mechanisms.
Solution Approach 2:
The patent performs preliminary association configuration between SRI and pathloss measurement parameters through RRC signaling before operation. By pre-establishing these associations and making them available in the codebook or through higher-layer configuration, the system achieves accurate power control without complex real-time signaling or configuration during transmission.
Data Source
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AI summary
Provided are a transmitting parameter determination method, an electronic device, an apparatus and a medium. The transmitting parameter determination method includes: determining a power control parameter of physical uplink shared channel (PUSCH) transmission according to association information between a sounding reference signal resource indicator (SRI) and a PUSCH power control parameter. The power control parameter of the PUSCH transmission includes at least one of an open-loop power control parameter of a PUSCH, a closed-loop power control parameter of a PUSCH, or a pathloss measurement parameter of a PUSCH.