Multi-Panel Power Control for 5G Uplink Interference
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Solution Overview
Problem
Current 5G NR Release-15 uplink beam-specific power control solutions fail to account for pathloss measurements between different antenna panels during simultaneous multi-panel transmission, leading to uplink interference issues, which can saturate receivers and disrupt data and control signal reception.
Innovation Solution
Implementing inter-antenna panel pathloss power difference measurements and interference-aware UL TX power control procedures to adjust transmission power, identifying and mitigating potential interference by computing pathloss differences and adjusting power levels accordingly, ensuring proper power control for simultaneous multi-panel transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simultaneous multi-panel transmission is implemented to enhance uplink coverage and reliability, then system robustness and coverage are improved, but uplink interference increases causing receiver saturation and disrupting data/control signal reception
Solution Approach 1:
The patent dynamically adjusts transmission power parameters for different antenna panels based on computed pathloss power differences. By changing the power parameter adaptively rather than using fixed power levels, the system maintains reliable multi-panel transmission while preventing receiver saturation from excessive interference
Solution Approach 2:
The patent implements a feedback mechanism where the UE computes pathloss measurements between different antenna panels and reports pathloss power difference indicators to the network. The network uses this feedback information to adjust uplink power control parameters, creating a closed-loop system that balances transmission reliability with interference control
2Device complexity
If traditional uplink power control is used without inter-panel pathloss measurements, then device complexity and signaling overhead are kept low, but interference management precision is insufficient leading to receiver saturation
Solution Approach 1:
The patent segments the pathloss measurement process into panel-specific measurements, where the UE separately measures pathloss for each antenna panel and computes power differences between panels. This segmentation enables precise interference management for each panel while keeping the overall implementation modular and manageable
Solution Approach 2:
The patent introduces pathloss power difference indicators as an intermediary measurement parameter. Instead of directly controlling absolute power levels, the system uses these intermediate difference indicators to adjust relative power levels between panels, simplifying the control mechanism while improving measurement precision
Data Source
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AI summary
Systems, methods, apparatuses, and computer program products for multi-antenna panel transmission power control are provided.