Multi-AP Power Control Using Iterative SINR Balancing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing power control methods in wireless communication networks struggle to balance interference and gain effectively when multiple access points serve multiple user equipment due to the complexity of multiple signal and interference sources, leading to suboptimal communication quality.

Innovation Solution

A power control method that adjusts power control parameters for access points based on signal-to-interference-plus-noise ratios (SINRs) of multiple terminals, using threshold parameter sets to dynamically determine target SINRs and iteratively adjust power until a stop condition is met, balancing signal and interference sources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional single-link power control method is used, then power control is simple to implement, but it cannot handle multiple APs serving multiple UEs with multiple signal and interference sources

Engineering Contradiction:

Improvecapability to handle multiple APs and UEsVSAvoidpower control process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the power control process into multiple independent stages: initial power control based on single-link SINR, iterative power adjustment based on multi-link SINR, and convergence determination. This segmentation allows the system to handle multiple APs and UEs by breaking down the complex power control into manageable steps, each focusing on specific aspects of the multi-user environment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent transitions from single-link power control to multi-link power control by introducing the dimension of inter-user and inter-AP interference. The iterative adjustment process adds another dimension of optimization by considering the impact of power changes on multiple simultaneous links, enabling the system to manage complexity through systematic multi-dimensional optimization.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If multiple APs serve multiple UEs simultaneously, then network service capability is enhanced, but interference and gain cannot be balanced well leading to poor communication quality

Engineering Contradiction:

Improvenetwork service capabilityVSAvoidcommunication quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where each AP measures and reports SINR values to the controller, which then uses this feedback information to iteratively adjust power control parameters. The feedback loop continues until convergence is achieved, ensuring that interference and gain are dynamically balanced across multiple links to maintain communication quality while supporting enhanced network service capability.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent dynamically changes power control parameters based on measured SINR values and target SINR requirements. By iteratively adjusting power parameters and comparing them against target values, the system achieves optimal balance between signal gain and interference suppression, enabling both high productivity and reliable communication quality in multi-AP multi-UE scenarios.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If iterative power adjustment is performed, then power control reliability is improved, but adjustment time and computational resources increase

Engineering Contradiction:

Improvepower control reliabilityVSAvoidpower adjustment time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs preliminary power control adjustments based on initial SINR measurements before entering the iterative refinement process. This preliminary action establishes a baseline power configuration that is already partially optimized, reducing the number of iterative adjustments needed and thereby decreasing the overall time required while maintaining high reliability through systematic optimization.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamic power adjustment with a convergence criterion that automatically determines when to stop iterating. The system dynamically adapts the adjustment process based on whether target SINR values are achieved, preventing unnecessary iterations and optimizing the balance between reliability and time consumption by stopping adjustment once sufficient convergence is reached.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12538239B2Power control method and apparatus, and communication node, and storage medium

Publication Date: 2026.01.27 ZTE CORP

AI summary

Provided are a power control method and apparatus, a communication node, and a storage medium. The power control method includes: acquiring initial power control information, where the initial power control information includes a power control parameter of each of access points (APs) providing a service for each of terminals, the number of the terminals is K, K is an integer greater than 1, the number of the access points is M, and M is an integer greater than 1; determining SINR of the K terminals according to the initial power control information and determining L target SINRs, where L is a positive integer; and adjusting a power control parameter of a target AP according to the SINRs of the K terminals and the L target SINRs until an iteration adjustment stop condition is satisfied, and an adjusted power control parameter is obtained.