Wireless Device Transmit Power Control via Neighbor Path Loss
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Solution Overview
Problem
Existing wireless local area networks (WLANs) face interference issues between access points due to uncontrolled transmit power, which affects signal coverage and efficiency.
Innovation Solution
A method and device for adjusting transmit power based on path losses between wireless devices, using a neighbor path loss set and target power to optimize signal strength and reduce interference, ensuring complete coverage without overpowering neighboring devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If transmit power of each access point is increased to ensure complete coverage area, then coverage area is improved, but interference between access points increases
Solution Approach 1:
The patent dynamically adjusts the transmit power parameter of access points based on measured path losses to neighboring devices. By changing the power parameter adaptively rather than using fixed high power, the system achieves complete coverage while minimizing interference with neighboring access points.
Solution Approach 2:
The patent implements a feedback mechanism where path loss measurements from neighboring wireless devices are continuously monitored and used to adjust transmit power. This closed-loop control ensures that coverage requirements are met while automatically reducing power when interference levels become problematic.
2Object-generated harmful factors
If transmit power is dynamically adjusted based on path loss measurements, then interference is reduced, but device complexity increases
Solution Approach 1:
The patent enables wireless devices to autonomously measure path losses and calculate appropriate power adjustments without requiring complex centralized control. Each device independently performs measurements and adjusts its own transmit power, simplifying the overall system architecture while achieving interference reduction.
Solution Approach 2:
The patent performs path loss measurements and power calculations in advance before actual data transmission begins. By pre-determining optimal power levels based on measured conditions, the system avoids complex real-time adjustments during active communication, reducing operational complexity.
Data Source
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AI summary
A transmit power control method, a device, and a wireless controller are disclosed. The method includes: obtaining a path loss between a to-be-adjusted wireless device and each of multiple wireless devices; and adjusting a transmit power of the to-be-adjusted wireless device according to a neighbor path loss and a target power. The neighbor path loss is a function of a neighbor path loss set. The neighbor path loss set is a set of path losses of a neighbor wireless device set. The neighbor wireless device set is a set of at least two wireless devices among the multiple wireless devices, where path losses between the at least two wireless devices and the to-be-adjusted wireless device are lowest, and a difference between neighboring path losses is less than or equal to a threshold. The threshold is used to layer the multiple wireless devices. A layer closest to the to-be-adjusted wireless device is used as a reference, to adjust the transmit power, and interference between wireless devices is reduced while ensuring complete coverage of a wireless signal in a coverage area.