SRS Resource Set Indication for Multi-Panel Uplink Power Control
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Solution Overview
Problem
Existing 3GPP Release 15 SRS configurations are inadequate for supporting multi-panel uplink transmissions in frequencies above 6 GHz, particularly in scenarios where independent power control among different panels is required, as they lack the flexibility to manage power distribution across multiple antenna ports effectively.
Innovation Solution
The proposed SRS configuration allows for multiple SRS resource sets, each associated with a different panel, enabling independent power control and indicating these resources in the DCI for codebook and non-codebook based UL transmissions, facilitating simultaneous transmission from multiple panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only one SRS resource set is configured per BWP in 3GPP Rel. 15, then the configuration complexity is low, but the system cannot support multi-panel uplink transmissions with independent power control
Solution Approach 1:
The patent divides the SRS resources into multiple SRS resource sets, where each set is associated with a specific panel. This segmentation allows independent power control and resource management for each panel, enabling multi-panel uplink transmissions while maintaining clear organizational structure for each resource set
Solution Approach 2:
The patent introduces a new dimension to the SRS configuration by adding panel association. Instead of a single flat SRS resource set configuration, the system now operates in a multi-dimensional space where each SRS resource set is linked to a specific panel, enabling independent control across different spatial dimensions
2Adaptability or versatility
If multiple SRS resource sets are configured for independent power control, then multi-panel transmission capability is enhanced, but the DCI signaling overhead increases
Solution Approach 1:
The patent creates a unified SRS resource set configuration framework that serves multiple functions: it supports both single-panel and multi-panel transmissions, provides independent power control when needed, and maintains backward compatibility with existing Rel. 15 systems. The same configuration structure adapts to different transmission scenarios
3Ease of operation
If SRS resources are indicated in DCI for codebook-based transmission, then uplink transmission flexibility is improved, but the processing complexity at gNB increases
Solution Approach 1:
The patent performs preliminary configuration of multiple SRS resource sets with their associated panels and power control parameters before actual uplink transmission. This pre-configuration allows the gNB to simply indicate which SRS resource set to use via DCI without performing complex real-time calculations, reducing processing complexity during transmission
Data Source
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AI summary
The embodiments herein relate to a method performed by a network node and a network node. The method comprises (301) setting a higher-layer parameter usage in at least one sounding reference signal, SRS, resource set configuration to nonCodebook or Codebook, wherein each configured SRS resource set comprises one or more SRS resources, and scheduling a physical uplink shared channel (PUSCH) transmission via a downlink control information (DCI) wherein at least two SRS resources are indicated via a sounding reference signal resource indicator (SRI) field of the DCI, wherein each SRS resource is associated with a different SRS resource set; and receiving (302) from the user equipment a physical uplink shared channel that is transmitted using the ports associated with the indicated SRS resources.