Programmable Base Station Power Supply for Remote Radio Cable Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Cellular base stations face significant power loss when delivering DC power to remote radio heads located at the top of tall towers, due to the high voltage and current requirements, leading to increased operational costs and signal degradation.
Innovation Solution
A programmable power supply that senses the current drawn by the remote radio head and adjusts the voltage output to maintain a constant voltage level at the remote end, reducing power loss by minimizing the current flowing through the power cable, which can be achieved by inputting the resistance or other cable characteristics into the power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DC power is delivered to the remote radio head at the top of the tower, then the radio can be located remotely to improve signal quality, but significant power loss occurs in the power cable due to high voltage and current requirements
Solution Approach 1:
The system dynamically changes the voltage and current parameters delivered through the power cable. By adjusting these electrical parameters based on cable characteristics and load conditions, the system optimizes power transmission efficiency while maintaining reliable operation of the remote radio head, thereby reducing power loss without compromising signal quality
Solution Approach 2:
The system incorporates feedback mechanisms that monitor power delivery conditions and adjust transmission parameters accordingly. This feedback loop enables the system to compensate for cable losses and maintain optimal power delivery to the remote radio head, reducing overall power loss while ensuring reliable operation
2Power
If high current is used to deliver power to the remote radio head, then sufficient power can be supplied, but power loss in the cable increases due to the square of the current
Solution Approach 1:
The system dynamically adjusts voltage and current parameters based on cable characteristics and load requirements. By optimizing these electrical parameters, the system achieves sufficient power delivery to the remote radio head while minimizing I²R losses in the cable, resolving the contradiction between power delivery and power loss
3Loss of energy
If larger diameter power cables are used to reduce power loss, then power loss decreases, but device complexity and installation difficulty increase
Solution Approach 1:
The system uses parameter changes to optimize power transmission efficiency without requiring larger cables. By dynamically adjusting voltage and current based on cable characteristics, the system achieves reduced power loss with standard cable specifications, avoiding the complexity and installation difficulties associated with larger diameter cables
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 significantly reduces power loss and operating costs by maintaining a constant voltage level at the remote radio head, allowing for the use of smaller diameter power cables and longer cabling connections, while improving signal quality.
Implementation Method 1
delivering a DC power signal to a remote radio head over a power cable may be accomplished with reduced power loss by setting the voltage of the DC power signal supplied by the DC power supply to a level that minimizes power loss in the power cable
Implementation Method 2
a DC power signal may be delivered over a power cable to a remote radio head that is mounted on a tower of a cellular base station
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
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.