Base Station Antenna Array Vertical Beam Power Control
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently controlling transmission power using multiple antennas, particularly in reducing interference to neighboring cells and optimizing channel state information measurement in high-density networks like FD-MIMO systems.
Innovation Solution
The method involves transmitting reference signals at various vertical angles through a 2D antenna array, allowing user equipment to measure channel state information and report it back to the base station, which adjusts transmission power accordingly to minimize interference and optimize signal direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission power is increased to improve data rate and system capacity, then productivity increases, but interference to neighboring cells increases
Solution Approach 1:
The patent applies local quality by configuring different reference signal powers for different antenna ports based on their specific beamforming directions and interference characteristics. Each antenna port's reference signal power is locally optimized according to its spatial direction, allowing high power transmission in directions with low interference while maintaining lower power in directions that may cause or experience high interference to neighboring cells.
Solution Approach 2:
The patent changes the power parameter of reference signals dynamically based on beamforming configurations and channel state information. The reference signal power is adjusted as a variable parameter rather than being fixed, allowing the system to optimize the balance between data rate and interference by modifying power levels according to real-time spatial and channel conditions.
2Measurement precision
If reference signal power is increased to improve channel state information measurement accuracy, then measurement precision improves, but use of energy increases
Solution Approach 1:
The patent applies local quality by setting different reference signal powers for different antenna ports based on their specific measurement requirements and spatial directions. Antenna ports that require higher measurement accuracy or operate in directions with poorer channel conditions are assigned higher reference signal powers, while ports with good channel conditions or less critical measurement requirements use lower powers, optimizing the overall energy efficiency.
Solution Approach 2:
The patent applies partial action by not uniformly increasing reference signal power across all antenna ports, but only increasing power where necessary for specific measurement accuracy requirements. This selective approach avoids excessive energy consumption while still achieving the needed measurement precision in critical directions and ports.
Data Source
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AI summary
The present invention relates to a 5G or pre-5G communication system for supporting a higher data transmission rate beyond a 4G communication system such as LTE and, more particularly, to a method and a device for controlling transmission power, the method being performed in a base station of a wireless communication system using multiple antennas. The method for controlling transmission power comprises the step of: transmitting a reference signal at a plurality of vertical angles that differ from each other by means of an antenna arrangement; receiving channel state information, which is related to beamforming of a transmission signal, from a terminal which has received the reference signal and measured a channel state; and transmitting the transmission signal to the terminal by means of transmission power which corresponds to the channel state information.