Dynamic Transmission Power Control for Wireless Access Point Interference
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Solution Overview
Problem
Existing wireless communications networks face inefficiencies in managing interference from neighboring cells, leading to wasted spectrum resources due to static frequency spectrum division, which cannot adapt to transient changes in service and user distribution.
Innovation Solution
A method and apparatus for improving network spectrum resource utilization by dynamically determining and adjusting transmission powers between access points based on feedback interference power parameters, allowing for efficient scheduling and data frame transmission even when channels are occupied by other access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static frequency spectrum division is used to reduce interference from neighboring cells, then interference management is simplified, but spectrum resource utilization deteriorates due to inability to adapt to transient changes
Solution Approach 1:
The patent implements dynamic frequency spectrum division where access points can flexibly select and switch between different frequency bands (first frequency band for non-occupying, second frequency band for occupying) based on real-time channel occupation detection. This dynamic approach allows the system to adapt to transient changes in service and user distribution while maintaining simple interference management through predefined frequency band rules.
2Productivity
If access points transmit at full power without coordination, then transmission efficiency is maximized, but interference to other cells increases significantly
Solution Approach 1:
The patent applies local quality by assigning different transmission power characteristics to different frequency bands based on local interference conditions. When a access point detects channel occupation, it switches to a second frequency band with reduced transmission power (power reduction value) that is specifically designed to minimize interference to the occupying cell, while maintaining adequate communication quality for local users.
Solution Approach 2:
The system implements feedback through channel occupation detection mechanisms where access points continuously monitor whether their transmission channel is being occupied by neighboring cells. Based on this feedback, they dynamically adjust their operating frequency band and transmission power levels to balance transmission efficiency with interference reduction to neighboring cells.
3Adaptability or versatility
If dynamic power adjustment is implemented to reduce interference, then spectrum resource utilization improves, but signaling overhead increases due to power parameter coordination
Solution Approach 1:
The patent uses lightweight, predefined power reduction values associated with each frequency band configuration instead of complex continuous power negotiation. These discrete power adjustment parameters are simple to signal and process, enabling dynamic spectrum utilization without imposing heavy signaling overhead for power coordinate between access points.
4Object-generated harmful factors
If centralized scheduling is used to coordinate transmissions, then interference coordination is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent enables each access point to autonomously detect channel occupation status and independently select appropriate frequency bands and power levels without requiring centralized scheduling. This self-service mechanism achieves effective interference coordination through distributed decision-making based on local observations, significantly reducing system complexity and signaling overhead compared to centralized approaches.
Data Source
AI summary
The present invention provides a data frame sending and receiving method and apparatus. The data frame sending method includes: receiving, by a first access point, first interference power parameters fed back by associated stations of the first access point, and receiving second interference power parameters sent by a second access point; if determining that a channel on which the first access point works is currently being occupied by the second access point, determining to-be-scheduled stations and transmission powers of the first access point for the to-be-scheduled stations, sending scheduling indication signaling at the determined transmission powers, and receiving scheduling indication response signaling sent by a schedulable station; and sending a data frame to the schedulable station at a transmission power corresponding to the schedulable station among the determined transmission powers.