Adaptive EIRP Management for Multi-Link WLAN Devices
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Solution Overview
Problem
Current wireless network technologies face challenges in maintaining Equivalent Isotropically Radiated Power (EIRP) regulations when using Multi-Link Devices (MLDs) with multiple radios operating in the same sub-band, leading to potential interference and reduced flexibility in operating modes.
Innovation Solution
The implementation of adaptive EIRP management across co-located radios in APs, where power is allocated based on Modulation and Coding Scheme (MCS), path loss compensation, and antenna selection, ensuring compliance with regulatory limits while maximizing data throughput and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple radios operate concurrently in the same sub-band with maximum power, then data throughput and aggregation capabilities are improved, but EIRP regulatory limits are exceeded causing interference
Solution Approach 1:
The patent implements dynamic EIRP management where transmit power levels are continuously adjusted based on real-time conditions. The system calculates path loss for each radio link and dynamically allocates power to maintain compliance with regulatory limits while maximizing throughput. This dynamic adjustment allows the system to adapt to changing channel conditions, client distances, and traffic demands without violating EIRP constraints.
Solution Approach 2:
The patent applies different power levels to different radio links based on their specific characteristics. Each radio link is evaluated independently for path loss, client position, and channel conditions, then assigned an optimized power level. This localized power allocation ensures that each link operates at its maximum effective power while the aggregate EIRP across all links remains compliant with regulatory limits.
2Object-affected harmful factors
If transmit power is reduced to comply with EIRP regulations, then interference is minimized, but data throughput and network performance deteriorate
Solution Approach 1:
The patent changes the power allocation parameters dynamically based on channel conditions. Instead of using fixed power levels, the system calculates optimal power values by considering path loss, client position, MCS (Modulation and Coding Scheme), and traffic requirements. This parameter optimization allows the system to achieve maximum throughput within EIRP constraints by precisely tuning power levels to match actual channel conditions.
Solution Approach 2:
The patent implements a feedback mechanism where the system continuously monitors channel conditions, client positions, and transmission performance. Based on this feedback, the EIRP management algorithm adjusts power allocation in real-time to maintain optimal throughput while ensuring regulatory compliance. The system uses information about path loss, signal quality, and traffic demands to make informed power adjustment decisions.
3Device complexity
If power is allocated equally across all radio links, then implementation is simplified, but efficiency is reduced due to ignoring path loss and channel conditions
Solution Approach 1:
The patent segments the power allocation process into distinct evaluation steps for each radio link. The system separately calculates path loss, determines channel conditions, evaluates traffic requirements, and assigns optimal power levels for each link independently. This segmented approach manages complexity by breaking down the overall power allocation problem into manageable per-link decisions while still achieving system-optimal results through coordinated EIRP management.
Data Source
AI summary
Optimal determination of transmit power level for MLDs in A Wireless Local Area Network (WLAN). An AP can establish synchronous downlink multi-link operations with another MLD. A first link and a second link between the AP and the MLD both operate in a same sub-band. The AP can then determine the same power level for both the first link and second link. After establishing the same power level, the AP can then determine a second power level for the first link and a third power level for the second link. The second power level is greater than the third power level. The AP can then provide the second power level for the first link and the third power level for the second link.