Wireless Access Point EIRP Control Using Client Position
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless access points face limitations in achieving maximum transmitter Effective Isotropic Radiated Power (EIRP) due to regulatory restrictions on bandwidth and transmit power, leading to reduced radiated power and array gain variations based on antenna geometry and client position, especially in MIMO environments.
Innovation Solution
A method involving a controller that determines client position and pathloss using trigger frames and uplink transmissions, calculates directional gain, and adjusts transmit power to optimize array gain, thereby improving EIRP by using 3D Multi-User MIMO Composite Directional Gain to stay within regulatory limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If regulatory restrictions on bandwidth and transmit power are imposed, then EIRP is limited, but array gain variations based on antenna geometry and client position increase
Solution Approach 1:
The system dynamically adjusts transmit power based on real-time client position and calculated directional gain. The controller continuously monitors client location and modifies EIRP settings to optimize performance while maintaining regulatory compliance, transforming a static power configuration into an adaptive system that responds to changing spatial conditions
Solution Approach 2:
The patent applies different transmit power levels and directional gain calculations specific to each client's position and antenna geometry. Instead of using a uniform power setting for all clients, the system tailors the EIRP configuration to local conditions, optimizing array gain for each client-ap antenna pair while staying within regulatory limits
2Productivity
If maximum transmit power is used, then throughput increases, but regulatory power limits are exceeded
Solution Approach 1:
The system changes the transmit power parameter dynamically based on client position and directional gain calculations. By adjusting this key parameter in real-time, the system achieves optimal throughput without consistently operating at maximum power, thereby avoiding regulatory violations while maintaining high productivity when conditions permit
3Power
If directional gain calculation based on client position is implemented, then EIRP improvement is achieved, but system complexity increases
Solution Approach 1:
The system determines client position and calculates directional gain automatically without requiring external intervention or complex manual configuration. The controller self-manages the entire process of position determination, pathloss calculation, and EIRP optimization, reducing the burden on operators while achieving improved power efficiency
Solution Approach 2:
The system uses feedback from client position data and uplink transmissions to continuously refine directional gain calculations and adjust transmit power. This closed-loop approach allows the system to adapt to changing conditions automatically, achieving improved EIRP through intelligent feedback-driven control rather than complex open-loop systems
Data Source
AI summary
Improving transmitter Effective Isotropic Radiated Power (EIRP) may be provided. Improving EIRP may include sending a trigger frame to a client and receiving an uplink transmission from the client in response. A client Transmission (TX) power and a Received Signal Strength Indication (RSSI) associated with the client may be determined using the uplink transmission. Next, a client location may be determined. A pathloss associated with the client may be determined using the client location and the uplink transmission. A directional gain may then be determined using the client TX power, the pathloss, and the RSSI. An array gain is determined based on the directional gain. An Access Point (AP) TX power is adjusted based on the array gain.