SRS Resource Group Configuration for Panel-Specific Uplink Control
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Solution Overview
Problem
Existing wireless communication technologies in NR Release-15 support only single-panel based UL transmission, limiting efficient utilization of multiple panels for improved reliability and throughput, as they lack panel-specific configurations and power control for multi-panel operations.
Innovation Solution
Implementing panel-specific configurations and power control by defining panel IDs and configuring unique power control parameters for each panel, enabling independent power control loops and panel-specific transmission through explicit or implicit methods, such as using SRS resource groups or DL-RS groups to manage power control per panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-panel based UL transmission is used, then device complexity is reduced, but UL transmission efficiency and reliability are limited
Solution Approach 1:
The patent segments the UL transmission system into multiple independent panels, where each panel can be configured and controlled separately. This is achieved by introducing panel-specific parameters such as panel IDs, panel-specific power control parameters, and panel-specific TCI states, allowing the system to divide the transmission task across multiple panels to improve reliability through diversity gain.
Solution Approach 2:
The patent implements dynamic panel selection and configuration mechanisms where the network can dynamically activate or deactivate specific panels based on channel conditions, traffic requirements, and interference scenarios. This dynamic control is achieved through RRC configuration messages that can enable or disable specific panels and their associated parameters.
2Productivity
If panel-specific configurations are implemented, then UL transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The configuration is segmented into panel-specific parameters including panel IDs, panel-specific power control parameters (p0, alpha, pathloss reference), and panel-specific TCI states. This segmentation allows efficient independent control of each panel while maintaining manageable complexity through structured parameter organization.
Solution Approach 2:
Panel-specific configurations are pre-configured through RRC signaling before actual transmission occurs. The network pre-assigns panel IDs, power control parameters, and TCI states to each panel, so that during actual UL transmission, the UE can efficiently activate pre-configured panels without real-time configuration overhead.
3Reliability
If multiple TRPs are used, then reliability and robustness are improved, but interference coordination becomes more difficult
Solution Approach 1:
The patent applies local quality by associating each panel with specific TRPs and configuring panel-specific parameters optimized for each TRP-panel link. This includes panel-specific power control parameters tailored to the pathloss characteristics of each TRP and panel-specific TCI states that optimize beamforming for each TRP connection, thereby managing interference through localized optimization.
Solution Approach 2:
The system implements feedback mechanisms where the network monitors the performance of each panel-TRP link and dynamically adjusts panel-specific parameters such as power control parameters and TCI states. This feedback-driven optimization helps coordinate interference among multiple TRPs by adapting to changing channel conditions and interference patterns.
Data Source
AI summary
Methods, a base unit and a remote unit are disclosed. According to one embodiment, a method at a base unit, comprise: transmitting to a remote unit a first message which includes a configuration related to two or more Sounding Reference Signal (SRS) resource groups each of which contains one or more SRS resources for codebook or non-codebook based UL transmission, wherein the one or more SRS resources in one SRS resource groups are transmitted by only one panel; and transmitting to the remote unit a second message which includes a set of power control parameters configured for each SRS resource group, wherein the set of power control parameters includes at least target receiving power, pathloss compensation factor and pathloss reference signal.