Base Station Antenna Transmit Power Adjustment via Precoding Matrix
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In radio communication systems, the uniform reduction of transmit powers across all base station antennas to meet power constraints leads to unnecessary loss of performance in coverage and capacity, as it reduces the transmit power of antennas that do not exceed the maximum limit, thereby deteriorating network performance.
Innovation Solution
A method and apparatus that adjust the precoding matrix based on the largest antenna transmit power and a preset threshold to discriminate between antennas, allowing for differential power adjustments, ensuring that only necessary reductions occur, thereby maintaining higher performance levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform power reduction is applied to all base station antennas to meet power constraints, then the transmit power constraint conditions are satisfied, but the transmit power of antennas that do not exceed the maximum limit is reduced unnecessarily, leading to performance loss in coverage and capacity
Solution Approach 1:
The patent applies local quality by differentiating power adjustment strategies for different antennas based on their individual power consumption characteristics. Instead of uniform power reduction, the system identifies specific antennas that exceed power limits and applies power reduction only to those antennas, while maintaining full power for antennas that are within limits. This localized approach preserves the performance of non-excessive antennas while satisfying overall power constraints.
2Reliability
If transmit powers of all base station antennas are reduced evenly, then the maximum transmit power limit is met, but the transmit power of power-limited antenna sets that do not exceed the limit is reduced to a lower level, causing unnecessary performance loss
Solution Approach 1:
The system implements local quality by calculating individual power adjustment factors for different power-limited antenna sets based on their specific power consumption and limit compliance status. Antennas within power limits receive adjustment factors of 1 (no reduction), while exceeding antennas receive reduced factors. This localized differentiation maximizes transmit power utilization while ensuring limit compliance.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the power adjustment factor α for different antenna sets based on their power consumption characteristics and limit compliance. The system calculates optimal α values that satisfy power constraints while minimizing performance impact, changing the power parameter selectively rather than uniformly across all antennas.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention provides a method and an apparatus for adjusting transmit powers of base station antennas, and a base station. The method includes: receiving an input precoding matrix of a transmit power-limited antenna set, where the precoding matrix is determined according to a scheduling result of a user equipment communicating with a base station in each layer of each subband in a system; adjusting the precoding matrix according to a transmit power limit requirement of the transmit power-limited antenna set, a system capacity improvement requirement, or a coverage performance improvement requirement to obtain an adjusted precoding matrix; and adjusting a stream transmit power of the transmit power-limited antenna set by using the adjusted precoding matrix, where the stream transmit power of the transmit power-limited antenna set is a sum of powers for transmitting a stream of the transmit power-limited antenna set on all antennas in the transmit power-limited antenna set, and the stream is data sent in a layer of a subband in the system to the user equipment.