Radio Terminal Multi-Panel Uplink Power Control Under Carrier Limits
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Solution Overview
Problem
In future radio communication systems, the challenge of appropriately controlling transmission power for each panel during simultaneous uplink transmission using multiple panels remains unclear, leading to potential reductions in communication throughput.
Innovation Solution
A terminal with a control section that reduces transmission power for at least one panel or cancels UL transmission when the total power exceeds the maximum per component carrier, ensuring appropriate power control for each panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous uplink transmission using multiple panels is supported, then uplink throughput and reliability are improved, but transmission power control becomes unclear and may fail
Solution Approach 1:
The patent segments the uplink transmission by introducing panel-specific transmission power control parameters (PO_PUSCH_panel, alpha_panel, pathloss reference signals per panel). Each panel is assigned dedicated power control parameters, allowing independent power management. This segmentation resolves the contradiction by enabling precise power control for each panel while maintaining simultaneous multi-panel transmission capability.
Solution Approach 2:
The patent applies local quality by configuring different power control parameters for different panels based on their specific channel conditions and transmission requirements. Each panel can have customized pathloss reference signals and power offsets, allowing optimized power distribution across panels. This local customization ensures reliable power control while maintaining high throughput through simultaneous transmission.
2Productivity
If transmission power per component carrier is increased, then communication throughput is improved, but maximum transmission power limit is exceeded
Solution Approach 1:
The patent implements dynamic power allocation across multiple panels using panel-specific power control parameters. The system dynamically adjusts the power distribution by selecting appropriate pathloss reference signals and applying panel-specific power offsets (PO_PUSCH_panel). This dynamic adjustment allows the system to maximize total transmission power up to the maximum limit while maintaining optimal throughput by adapting to varying channel conditions on different panels.
Solution Approach 2:
The patent changes key power control parameters (PO_PUSCH, alpha, pathloss reference signal values) on a per-panel basis to optimize the total transmission power utilization. By modifying these parameters dynamically for each panel according to channel quality and transmission priorities, the system achieves maximum throughput without exceeding the maximum transmission power limit per component carrier.
3Power
If transmission power is reduced for power control, then maximum transmission power limit is maintained, but communication throughput may be reduced
Solution Approach 1:
The patent merges the transmission power control across multiple panels to achieve optimal total power utilization. By combining the power contributions from multiple panels with panel-specific power control parameters, the system maintains the maximum transmission power limit while achieving higher aggregate throughput than single-panel transmission. The merging of multi-panel transmissions with coordinated power control resolves the contradiction by distributing power efficiently across panels.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a control section that, when uplink (UL) simultaneous transmission from multiple panels is supported, and transmission power per component carrier exceeds maximum transmission power per the component carrier, determines to reduce transmission power for at least one panel or cancel UL transmission, and a transmitting section that controls UL transmission, based on the determination. According to one aspect of the present disclosure, it is possible to appropriately perform transmission power control for each panel.