Central Coordinator ATT Value Adjustment for Wireless AP Interference
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Solution Overview
Problem
In high-density wireless LAN environments, existing methods for setting frequency channels and transmission power values lead to interference among access points, resulting in decreased communication quality and throughput, especially in urban areas or large networks where manual parameter setting is difficult and inefficient.
Innovation Solution
A wireless communication system where a central coordinator adjusts the attenuator value (ATT value) for each access point based on detected signal levels from neighboring APs, optimizing the service area and throughput by calculating an optimal ATT value using an RSSI threshold to ensure prescribed service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the number of access points is increased to provide wider service area, then the service coverage is improved, but interference among access points increases and throughput decreases
Solution Approach 1:
The patent dynamically adjusts transmission power parameters for each access point based on real-time detection of neighboring AP signal levels. The central coordinator calculates optimal transmission power values that allow multiple APs to coexist in high-density environments without causing excessive interference, thereby maintaining both wide service coverage and acceptable throughput levels.
Solution Approach 2:
The system implements a feedback mechanism where each access point detects the signal level of neighboring APs and reports this information to the central coordinator. The coordinator uses this feedback to continuously optimize transmission power settings, creating a closed-loop control system that adapts to changing network conditions and maintains optimal performance as APs are added or removed.
2Reliability
If manual parameter setting is performed for each access point, then communication quality can be optimized, but the complexity and time required for setup increases significantly
Solution Approach 1:
The system enables automatic self-configuration of transmission power parameters through the central coordinator, which detects the wireless environment and calculates optimal settings without human intervention. Each access point automatically reports its detected signal levels, and the coordinator automatically computes and distributes the optimal transmission power values, eliminating the need for manual parameter tuning while maintaining high communication quality.
Solution Approach 2:
The central coordinator acts as an intermediary between access points and the network configuration process. It collects environmental data from multiple APs, performs the complex calculations to determine optimal transmission power settings, and distributes these settings to individual APs. This intermediary approach simplifies the overall system by centralizing the complex parameter optimization task.
3Area of stationary object
If transmission power is increased to expand service area, then coverage is improved, but interference with neighboring access points increases
Solution Approach 1:
The patent applies different transmission power settings to each access point based on its local environment and the detected signal levels of neighboring APs. Instead of using a uniform transmission power level across the network, the system tailors the transmission power for each AP to its specific location and surrounding conditions, allowing some APs to transmit at higher powers while others use lower powers, thereby expanding overall coverage while minimizing local interference.
Data Source
AI summary
The each AP includes a control unit that detects, as the wireless environment information, a signal detection level for one or more neighboring APs positioned in the neighborhood of the AP and notifies the detected signal detection level to the central coordinator, and controls the ATT value by the setting in the central coordinator; and the central coordinator includes a parameter calculation unit that calculates the ATT value for each the APs, based on the signal detection level for each the neighboring wireless access point notified from the plurality of APs and based on an RSSI threshold at which each the APs is able to secure a prescribed service area.