Coordinator AP Power Signaling for Multi-AP Interference Control
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Solution Overview
Problem
In multi-AP communication systems, radio interference can reduce communication speed due to inappropriate transmission power settings among APs and STAs.
Innovation Solution
A communication device that cooperates with an access point to perform data communication, transmitting frames that include information for identifying the access point and specifying transmission power, enabling coordinated power management among multiple APs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each AP or STA transmits radio waves at transmission power set by themselves, then each device can operate independently, but radio interference increases and communication speed decreases
Solution Approach 1:
The Coordinator AP acts as an intermediary that centralizes transmission power management. It collects power settings from multiple APs and STAs, processes this information, and distributes optimized power settings back to the devices. This mediator approach resolves the contradiction by maintaining independent device operation while preventing radio interference through centralized coordination.
Solution Approach 2:
The system implements feedback loops where the Coordinator AP receives transmission power information from APs and STAs, analyzes the current radio environment, and sends back adjusted power settings. This feedback mechanism enables dynamic adaptation of transmission power to maintain high communication speed while preventing interference, resolving the contradiction between independent operation and communication performance.
2Productivity
If multiple APs cooperate to perform data communication with STAs, then throughput increases due to increased spatial streams, but coordination of transmission power becomes necessary to avoid radio interference
Solution Approach 1:
The Coordinator AP serves as a dedicated intermediary that handles the complex coordination tasks among multiple APs and STAs. By centralizing the coordination function in a single entity, the system achieves high throughput through cooperative transmission while managing the coordination complexity centrally rather than requiring complex peer-to-peer coordination among all devices.
Solution Approach 2:
The patent merges the coordination functions of multiple APs into a single Coordinator AP. This consolidation combines the distributed coordination tasks into one centralized entity, enabling multiple APs to cooperate for high throughput while reducing overall system complexity by eliminating the need for complex inter-AP coordination protocols.
3Reliability
If transmission power is increased to improve signal strength, then communication reliability improves, but radio interference increases and reduces overall communication speed
Solution Approach 1:
The Coordinator AP dynamically adjusts transmission power parameters based on real-time radio environment conditions, device locations, and traffic demands. By continuously optimizing the power parameter rather than using fixed high or low settings, the system maintains communication reliability when needed while minimizing interference to preserve overall communication speed.
Solution Approach 2:
The system implements dynamic transmission power control where the Coordinator AP continuously monitors communication conditions and adjusts power settings in real-time. This dynamic approach allows transmission power to adapt to changing conditions, maintaining reliability during poor signal conditions while reducing power during good conditions to minimize interference and maintain high communication speed.
Data Source
AI summary
A communication device that performs wireless communication that complies with IEEE 802.11 series of standards, including: at least one memory that stores a set of instructions, and at least one processor that executes the instructions, the instructions, when executed, causing the device to perform operations including: cooperating with an access point to perform data communication with a station, wherein in the cooperating, transmitting, to the access point, a frame instructing the access point to communicate with the station, the frame including information for identifying the access point and information regarding transmission power.