Wireless Terminal Power Scaling for Carrier Aggregation
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Solution Overview
Problem
The distribution of transmission power to multiple base stations in wireless communication systems, particularly in heterogeneous networks, is inefficient due to the lack of prioritization and optimal power allocation between macro and small cells, leading to suboptimal power use and potential retransmissions.
Innovation Solution
A wireless communication apparatus and method that uses different scaling factors for transmission power to prioritize power allocation based on propagation loss and available maximum transmission power, ensuring adequate reception power at each base station, with higher priority given to signals transmitted to base stations with lower propagation loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is distributed equally among multiple base stations using carrier aggregation, then communication coverage is maintained, but power efficiency deteriorates and retransmissions increase
Solution Approach 1:
The patent applies local quality by assigning different transmission power levels to different base stations based on their specific propagation loss characteristics. The terminal device calculates separate scaling factors for each base station, allowing localized optimization of power distribution rather than uniform allocation, thereby improving power efficiency while maintaining communication quality.
Solution Approach 2:
The patent changes the power distribution parameter by introducing different scaling factors for different base stations. Instead of using a single uniform power level, the system dynamically adjusts transmission power parameters based on propagation loss measurements, enabling optimized power allocation that reduces overall power consumption while maintaining reliable communication.
2Reliability
If transmission power is increased to ensure adequate reception at all base stations, then communication reliability is improved, but total power consumption increases
Solution Approach 1:
The patent changes the transmission power parameter by calculating individual scaling factors for each base station based on their specific propagation loss. This allows the system to use just enough power for each base station without excessive over-provisioning, thereby maintaining reception power adequacy while minimizing total transmission power consumption.
Solution Approach 2:
The patent applies partial action by allocating transmission power selectively to each base station according to its specific needs rather than providing full power to all. The scaling factors ensure that each base station receives adequate (but not excessive) power, optimizing the balance between reliability and power consumption.
3Use of energy by moving object
If different scaling factors are used for power distribution to multiple base stations, then power efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the terminal device to autonomously calculate and adjust transmission power scaling factors for each base station based on propagation loss measurements. The system performs self-optimization without requiring complex external control mechanisms, thereby improving power distribution efficiency while keeping the control system relatively simple.
Solution Approach 2:
The patent uses feedback by measuring propagation loss for each base station and using these measurements to calculate appropriate scaling factors. This closed-loop approach allows the system to adaptively optimize power distribution based on actual channel conditions, improving efficiency while maintaining manageable complexity through straightforward feedback-based control.
Data Source
AI summary
There is provided a wireless communication apparatus which achieves high efficiency in power use in such a manner that transmission power is adequately distributed in simultaneous transmission to multiple base stations. The wireless communication apparatus provided by the present invention, at the same time, transmits a first data signal to a first base station apparatus by using a first CC and transmits a second data signal to a second base station apparatus by using a second CC. The wireless communication apparatus includes a transmission-power controller that scales transmission power by using different scaling factors for the first data signal and the second data signal, when the sum of transmission power of the first data signal and transmission power of the second data signal is larger than a predetermined value. The transmission power of the first data signal is calculated to obtain predetermined reception power in the first base station apparatus. The transmission power of the second data signal is calculated to obtain predetermined reception power in the second base station apparatus.