Base Station Power Control for Code-Division Shared Channels
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Solution Overview
Problem
In current data transmission processing procedures, especially for physical downlink shared channels, the flexibility of power control is compromised when multiple terminal devices share a single power control factor during code division multiplexing, leading to suboptimal signal quality.
Innovation Solution
A method where a base station separately modulates and allocates power to each terminal device's bit stream using distinct modulation schemes and power control factors, ensuring independent power allocation while maintaining code division multiplexing, thereby improving power control flexibility and signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple terminal devices share a single power control factor during code division multiplexing, then device complexity is reduced, but power control flexibility deteriorates
Solution Approach 1:
The patent segments the power control process by introducing separate power control factors for different terminal devices. Instead of using a single unified power control factor for all devices sharing a code division multiplexing resource, the system now applies device-specific power control factors (e.g., first power control factor for first terminal device, second power control factor for second terminal device), enabling independent power adjustment for each device while maintaining code division multiplexing structure
Solution Approach 2:
The patent implements local quality by allowing different power control parameters to be applied to different terminal devices within the same code division multiplexing group. Each terminal device can have its own power control factor tailored to its specific channel conditions, quality requirements, and service type, rather than applying a uniform power control strategy to all devices
2Device complexity
If multiple terminal devices share a single power control factor, then system simplicity is improved, but signal quality deteriorates
Solution Approach 1:
The patent segments the power control mechanism to provide device-specific power adjustment. By introducing separate power control factors for different terminal devices (first power control factor, second power control factor, etc.), the system can optimize signal quality for each device independently based on its channel conditions, modulation scheme, and service requirements, rather than using a single粗放 power control factor
Solution Approach 2:
The patent changes the power control parameters from a single unified factor to multiple device-specific factors. This parameter change enables the system to adjust power allocation dynamically for each terminal device according to its specific needs, improving signal quality through precise power control while maintaining the overall system structure
Data Source
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AI summary
A power control method and a device are provided. The method includes: modulating a first bit stream by using a first modulation scheme, to obtain a first modulation symbol, modulating a second bit stream by using a second modulation scheme, to obtain a second modulation symbol, and modulating, by using a third modulation scheme, a combined bit stream obtained by combining the first bit stream and the second bit stream, to obtain a joint modulation symbol; obtaining a first modification coefficient and a second modification coefficient based on the first modulation symbol, the second modulation symbol, and the joint modulation symbol; modifying the first modulation symbol by using the first modification coefficient, to obtain a first modified modulation symbol, and modifying the second modulation symbol by using the second modification coefficient, to obtain a second modified modulation symbol; separately performing power control processing on the first modified modulation symbol and the second modified modulation symbol, combining a first modified modulation symbol obtained after the power control and a second modified modulation symbol obtained after the power control, and sending, to a terminal device, a combined modulation symbol obtained after the power control.