Base Station Antenna Power Control with Common and Individual Adjustments
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Solution Overview
Problem
Existing base station systems face challenges in efficiently controlling transmission and reception power across multiple antennas using a shared frequency channel, leading to increased circuit complexity and cost, as well as delayed power control precision when using multiple control lines, especially with a large number of antennas.
Innovation Solution
A base station configuration that includes power change units for each antenna, a power control unit, a common power change management unit, and individual power notification units to manage and notify power changes, allowing for power control using a reduced number of control lines by pre-storing individual power change amounts and calculating a common power change amount for each target terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple control lines are used to control power change units in each antenna, then power control precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the control of multiple power change units by introducing a common power change amount that is shared across all antennas, reducing the need for separate control lines for each antenna while maintaining power control precision through the combination of common and individual power adjustments
2Measurement precision
If multiple control lines are used to control power change units in each antenna, then power control precision is improved, but processing time increases
Solution Approach 1:
The patent combines the common power change amount notification with individual power change amounts, allowing the power control unit to process power adjustments for multiple antennas in parallel rather than sequentially, thereby reducing processing time while maintaining precision
Solution Approach 2:
The power control unit pre-calculates and stores individual power change amounts for each antenna based on previous communication conditions, so that when power control is needed, only the common power change amount needs to be notified immediately, reducing the real-time processing time
3Productivity
If the number of antennas is increased, then communication capacity is improved, but the amount of control information increases
Solution Approach 1:
The patent merges the control information for multiple antennas into a single common power change amount that applies to all antennas, significantly reducing the total control information required while still enabling individual power adjustment capabilities through pre-stored individual power change amounts
Data Source
AI summary
Provided are n antennas and n power change units; a power control unit; a power change management unit managing a common power change amount and an individual power change amount; a common power notification unit notifying the power control unit of the common power change amount in accordance with a target terminal; an individual power notification unit notifying the power control unit in advance of the individual power change amount in accordance with the each terminal at a prescribed timing, in which the power control unit stores the individual power change amount in a storage unit, and performs control of power changing by adding up the common power change amount in accordance with the target terminal, which is notified from the common power notification unit, and the individual power change amount.