Base Station Power Amplifier Bias Gating for Idle OFDMA Symbols
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, especially in high-speed technologies like WiMAX and LTE, the RF power amplifier in base stations consumes a significant amount of power due to fluctuating data traffic, necessitating a method to control power consumption effectively.
Innovation Solution
A transmission power control method for the power amplifier in base stations that involves checking scheduling information to identify symbols carrying no user data and turning off the bias of the power amplifier for those symbol durations, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the power amplifier operates continuously to support high bandwidth and peak-to-average-power ratio requirements, then the system can handle fluctuating data traffic, but power consumption increases significantly
Solution Approach 1:
The patent applies periodic action by enabling the power amplifier to operate in a discontinuous manner - turning on during periods when data transmission is required and turning off during periods of low or no traffic. This periodic operation pattern allows the system to maintain adaptability to fluctuating traffic while significantly reducing average power consumption compared to continuous operation.
Solution Approach 2:
The patent implements dynamics by making the power amplifier's operational state variable rather than fixed. The amplifier dynamically transitions between active and inactive states based on real-time traffic conditions, allowing the system to adapt its power consumption level to match the current data transmission requirements, thus resolving the contradiction between adaptability and energy use.
2Use of energy by moving object
If the power amplifier is controlled to reduce power consumption during low traffic periods, then energy efficiency improves, but system reliability may be compromised
Solution Approach 1:
The patent employs feedback mechanisms to monitor traffic conditions and system state, using this information to intelligently control the power amplifier's operation. The feedback loop ensures that the amplifier is activated when traffic demands require it and deactivated when conditions permit, maintaining system reliability while optimizing power consumption based on actual operational needs.
Solution Approach 2:
The patent applies preliminary action by preparing the power amplifier for rapid activation before traffic bursts occur. The system maintains readiness mechanisms that allow the amplifier to quickly transition from inactive to active state when traffic conditions change, ensuring that reliability is not compromised despite reduced power consumption during low-traffic periods.
Data Source
AI summary
A power control method of a base station in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA) is provided for reducing power consumption by turning off the bias of the power amplifier for the duration of a symbol carrying no user data. The method includes checking scheduling information of radio resources, detecting a symbol carrying no user data, based on the scheduling information, and turning off a bias of the power amplifier for a symbol duration of the symbol carrying no user data. The transmission power control method is capable of reducing power consumption of the base station by turning off the bias of the power amplifier of the base station for the symbol duration in which no user data is transmitted.