Transmission Power Control Using Priority-Based Attenuation
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently controlling transmission power when transmitting multiple signals, particularly when the sum of transmission powers exceeds the maximum allowed power, leading to potential interference and reduced performance.
Innovation Solution
The method involves prioritizing transmission powers of physical channels and adjusting them to prevent exceeding the maximum transmission power limit, using techniques such as power control commands, attenuation coefficients, and priority-based reductions to ensure efficient power allocation across multiple component carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to maintain signal quality when multiple signals are transmitted, then communication reliability is improved, but the maximum transmission power limit is exceeded causing interference and performance degradation
Solution Approach 1:
The patent dynamically adjusts transmission power parameters by introducing attenuation coefficients that modify the calculated transmission power for each physical channel. When the sum of transmission powers exceeds the maximum limit, the system changes the power parameters by applying attenuation factors to reduce individual channel powers, thereby preventing interference while maintaining acceptable communication reliability.
Solution Approach 2:
The patent implements dynamic power control by continuously monitoring the sum of transmission powers across multiple physical channels and adjusting power allocation in real-time. The system dynamically determines attenuation coefficients based on current transmission conditions and applies them to individual channels, enabling adaptive power management that responds to changing system states and prevents power limit violations.
2Object-affected harmful factors
If transmission power is reduced to comply with maximum power limits, then interference is minimized, but signal quality and communication performance deteriorate
Solution Approach 1:
The patent applies different attenuation coefficients to different physical channels based on their individual characteristics, priorities, and channel conditions. Instead of uniformly reducing power across all channels, the system selectively applies power attenuation to specific channels where it is most appropriate, preserving signal quality in critical channels while reducing power in less critical channels to comply with maximum power limits.
Solution Approach 2:
The patent modifies transmission power parameters by calculating attenuation coefficients that are specific to each physical channel. These parameter changes are designed to minimize the impact on communication reliability by adjusting power levels in a controlled manner that maintains acceptable signal quality while ensuring the total transmission power does not exceed the maximum limit.
3Adaptability or versatility
If power is allocated to multiple physical channels simultaneously, then communication versatility is improved, but the complexity of power management increases
Solution Approach 1:
The patent simplifies power management complexity by introducing a systematic parameter change approach using attenuation coefficients. The method provides a structured framework for adjusting power parameters across multiple channels based on calculated coefficients, making the complex power allocation process more manageable and systematic while maintaining the ability to allocate power to multiple physical channels simultaneously.
Solution Approach 2:
The patent segments the power management process into distinct steps: calculating individual channel powers, summing them to check against the maximum limit, determining attenuation coefficients when needed, and applying these coefficients to individual channels. This segmentation of the power control process into manageable stages reduces the perceived complexity while enabling versatile multi-channel communication.
Data Source
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AI summary
The present invention relates to a radio communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a radio communication system, said method comprising the steps of determining the transmission power for both a first channel and a second channel independently from one another; reducing at least the transmission power of the first channel or the transmission power of the second channel in consideration of a channel priority when the sum of the transmission power of the first channel and the transmission power of the second channel exceeds a maximum transmission power, and transmitting signals at the same time to a base station through the first channel and the second channel.