SRI-Based Power Control for Multi-Panel Wireless Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power control for multi-beam operations, particularly in multi-TRP scenarios, leading to suboptimal performance and interference issues.
Innovation Solution
The use of sounding reference signal resource indicators (SRIs) for power control indication, allowing UEs to determine and adjust transmission power based on specific parameters, enhancing power control accuracy and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional power control methods are used in multi-TRP scenarios, then system complexity is reduced, but power control precision deteriorates leading to suboptimal performance
Solution Approach 1:
The SRI field in DCI is designed to serve multiple functions: it identifies SRS resources for channel state information reporting and simultaneously indicates power control parameters for multi-panel PUSCH transmissions. This multi-functionality allows the system to achieve precise power control without adding separate dedicated signaling fields, thereby improving power control precision while avoiding excessive system complexity
Solution Approach 2:
The patent utilizes existing SRI parameter fields and reinterprets or extends their functionality to carry power control indications. By changing the interpretation of existing parameters rather than introducing new complex signaling structures, the system achieves enhanced power control precision while maintaining relatively simple system architecture
2Object-affected harmful factors
If multi-panel transmission is implemented without enhanced SRI, then device complexity is minimized, but interference control worsens due to insufficient power adjustment granularity
Solution Approach 1:
The SRI structure is segmented into multiple fields with specific functions: one or more SRI fields identify different SRS resource sets, while associated power control parameter fields provide granular power adjustment for each panel. This segmentation allows independent optimization of power control for each transmission panel, enabling precise interference control without requiring complete redesign of the SRI structure
Solution Approach 2:
The SRI configuration is made dynamic through DCI signaling, allowing the network to adaptively adjust power control parameters based on real-time channel conditions and interference levels. This dynamic adjustment capability enables the system to respond to changing interference conditions without increasing static structural complexity
3Measurement precision
If separate power control signaling is added for multi-beam operations, then power control accuracy is improved, but signaling overhead increases
Solution Approach 1:
Power control indications are merged with existing SRI signaling in the DCI structure. The SRI fields that already identify SRS resources are combined with power control parameter fields to form an integrated signaling mechanism. This merging allows the system to convey both resource identification and power control information in a single signaling message, improving power control accuracy while avoiding the overhead of separate dedicated power control signaling
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a control message, wherein the control message includes, for a multi-panel transmission, a first sounding reference signal (SRS) resource indicator (SRI) and a second SRI. The UE may determine power control information for the multi-panel transmission, wherein the power control information includes first power control information for a first transmission and second power control information for a second transmission. The UE may transmit the first transmission and the second transmission, in accordance with the first power control information and the second power control information, respectively, using a set of panels. Numerous other aspects are described.