Mobile Station Antenna Power Optimization
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Solution Overview
Problem
The use of multiple transmission antennas in wireless communication systems leads to increased power consumption due to the need for multiple amplifiers and digital-to-analog converters, which is inefficient and affects communication quality.
Innovation Solution
Determining the optimal number of transmission antennas based on a parameter related to transmission power, such as amplifier distortion, to reduce power consumption and improve communication efficiency, while also selecting the most suitable communication scheme to maximize spectrum efficiency and minimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission antennas are used in mobile stations, then communication quality and data capacity are improved, but power consumption increases extremely due to multiple amplifiers and D/A converters
Solution Approach 1:
The patent implements dynamic switching between single-antenna and multi-antenna transmission modes based on real-time communication conditions. The mobile station determines whether to use multiple transmission antennas by evaluating parameters such as buffer status, channel conditions, and power consumption thresholds, thereby adapting the antenna configuration to current operational needs rather than using a fixed multi-antenna setup
Solution Approach 2:
The patent changes the operational parameters of the transmission system by introducing a determination mechanism that evaluates multiple factors (buffer status, channel quality, power consumption) to dynamically adjust the number of active transmission antennas. This parameter-based decision-making allows the system to optimize between communication quality and power consumption by selecting appropriate antenna configurations based on current system state
2Productivity
If multiple transmission antennas are used, then large-capacity communications are enabled, but device complexity increases due to additional amplifiers and D/A converters
Solution Approach 1:
The system dynamically adjusts the number of active transmission antennas based on data capacity requirements and channel conditions. When high data capacity is needed and channel conditions support it, multiple antennas are activated; otherwise, the system reverts to single-antenna operation, thereby managing device complexity adaptively rather than requiring full multi-antenna capability to be always active
Solution Approach 2:
The patent extracts or activates only the necessary number of transmission antennas and associated components (amplifiers, D/A converters) based on current communication requirements. Instead of having all multi-antenna components permanently active and contributing to device complexity, the system selectively activates only what is needed for the current transmission task, effectively taking out only the required subsystem components
Data Source
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AI summary
To reduce power consumption in a mobile station apparatus in uplink, while making the system more efficient, the mobile station apparatus has a plurality of transmission antennas 7, performs wireless communications with a base station apparatus, and is provided with a PDCCH reception part 2 that receives designation information for designating the number of transmission antennas to use from the base station apparatus, a PH calculation part 5 that calculates PH (Power Headroom) indicative of a difference between maximum transmission power and transmission power required to achieve desired reception power in the base station apparatus, and a PUSCH transmission part 6 that transmits a signal including the PH to the base station apparatus using the number of transmission antennas designated by the designation information.