Remote Radio Head DC Power Control for Cable Loss Reduction
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Solution Overview
Problem
Cellular base stations face significant power loss and increased costs due to the long distances of DC power cables required to supply remote radio heads, leading to inefficient power delivery and higher operational expenses.
Innovation Solution
A programmable power supply system that adjusts the voltage of the DC power signal based on the resistance and current of the power cable to maintain a substantially constant voltage at the remote radio head, reducing power loss and using a DC-to-DC converter to optimize power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If DC power is supplied over long distances to remote radio heads, then coverage and signal quality are improved, but power loss increases
Solution Approach 1:
The system dynamically adjusts the voltage of DC power signals based on cable resistance and current to maintain constant voltage at the remote radio head, reducing power loss while enabling long-distance power delivery for improved coverage and signal quality
Solution Approach 2:
The programmable power supply uses feedback control to monitor and adjust output voltage in real-time, compensating for voltage drops in long power cables and minimizing energy loss while maintaining reliable power delivery to remote locations
2Loss of energy
If higher voltage is used to reduce current and power loss, then power delivery efficiency is improved, but equipment complexity increases
Solution Approach 1:
The system dynamically adjusts voltage parameters based on cable resistance and current conditions, optimizing power delivery efficiency while using a programmable power supply that manages complexity through software control rather than complex hardware
3Loss of energy
If voltage is adjusted to maintain constant voltage at remote radio head, then power loss is reduced, but device complexity increases
Solution Approach 1:
The programmable power supply adjusts voltage parameters dynamically to maintain constant voltage at the remote radio head, reducing power loss while managing system complexity through intelligent control algorithms
Solution Approach 2:
The system implements feedback control to automatically adjust voltage and maintain constant output at the remote end, reducing power loss while using software-based control to manage device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power loss and operational costs by maintaining a stable voltage at the remote radio head, allowing for the use of smaller diameter cables and minimizing the need for additional equipment at the tower, thereby lowering capital and maintenance expenditures.
Implementation Method 1
A voltage level of the DC power signal that is output from the power supply is adjusted so that the DC power signal at a radio end of the power cable that is remote from the power supply has a substantially constant voltage notwithstanding variation in a current level of the DC power signal
Data Source
AI summary
Methods of powering a radio that is mounted on a tower of a cellular base station are provided in which a direct current (“DC”) power signal is provided to the radio over a power cable and a voltage level of the output of the power supply is adjusted so as to provide a substantially constant voltage at a first end of the power cable that is remote from the power supply. Related cellular base stations and programmable power supplies are also provided.