Closed Loop Transmit Power Control for Dense Wi-Fi Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The deployment of a large number of access points in wireless networks, particularly in the 6 GHz spectrum, leads to challenges in power control due to increased co-channel interference, sticky clients, and roaming delays, which are exacerbated by automated frequency coordination (AFC) requirements.
Innovation Solution
A closed loop transmit power control method is implemented, which identifies access points operating in low power indoor (LPI) and standard power (SP) modes, determines composite RF density scores, and designates seed access points to minimize power updates and optimize channel reuse, thereby reducing co-channel contention and improving network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of access points is increased to improve network coverage, then network coverage is improved, but co-channel interference increases
Solution Approach 1:
The patent dynamically adjusts transmit power parameters of access points based on RF density measurements and feedback from the network environment. By changing the power parameter adaptively rather than statically, the system can increase coverage area while controlling interference levels through closed-loop power control.
Solution Approach 2:
The patent implements a closed-loop feedback mechanism where access points monitor RF density, measure network performance metrics, and adjust their transmit power accordingly. This feedback system allows the network to self-optimize, maintaining coverage while minimizing co-channel interference through continuous adaptation.
2Power
If transmit power is increased to improve signal strength, then signal strength is improved, but co-channel contention increases
Solution Approach 1:
The patent dynamically adjusts transmit power parameters of access points based on RF density measurements and feedback from the network environment. By changing the power parameter adaptively rather than statically, the system can increase coverage area while controlling interference levels through closed-loop power control.
Solution Approach 2:
The patent transforms static power settings into dynamic, adaptive power control. Access points continuously adjust their transmit power based on real-time RF density measurements and network conditions, allowing signal strength to be optimized without generating excessive contention through rigid high-power settings.
3Productivity
If frequency coordination is automated to improve deployment efficiency, then deployment efficiency is improved, but power control complexity increases
Solution Approach 1:
The patent implements self-service through automated RF density measurement and closed-loop power control algorithms that operate autonomously without manual intervention. The system self-configures power settings based on measured conditions, maintaining efficiency while managing complexity through standardized automated procedures rather than manual configuration.
Solution Approach 2:
The patent performs preliminary RF density measurements and power level determinations before full network operation begins. By pre-configuring power settings based on initial measurements and then refining them through closed-loop control, the system reduces deployment complexity while maintaining automated efficiency.
Data Source
AI summary
A network of access points may be provided. Access points operating in a low power indoor (LPI) mode and access points operating in a standard power (SP or SPI) mode are identified. The access points operating in an SP or SPI mode are sorted by available frequencies and maximum power budget. For each access point in the network, a composite radio frequency (RF) density score is determined, wherein higher density scores correspond to a denser population of access points in the network. If the composite RF density score is above a determined level, the access point that supports frequencies below a threshold level and that have an effective isotropic radiated power (EiRP) above a determined level are determined as a seed candidate. At least one of the seed candidates is determined as a seed access point.