WLAN Power Adjustment via Reference Signal Feedback
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Solution Overview
Problem
WLAN networks in closed spaces, such as motor vehicles, face challenges in optimizing transmission power to balance energy efficiency and minimize interference, especially when movement between modules is negligible.
Innovation Solution
A device comprising a first WLAN module and a reference WLAN module adjusts transmission power based on received signal strength, ensuring that the signal at the reference module remains below a predefined upper threshold while maintaining sufficient reception for other modules, thereby reducing interference and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to ensure sufficient reception for all WLAN modules, then reliability of communication is improved, but energy consumption increases and interference with external networks worsens
Solution Approach 1:
The system dynamically changes the transmission power parameter based on the spatial distribution of WLAN modules. Instead of using a fixed high power level, the first WLAN module adjusts its transmission power according to the actual reception conditions of other modules, thereby reducing energy consumption while maintaining communication reliability.
Solution Approach 2:
The system implements a feedback mechanism where the first WLAN module receives signal strength information from other modules and adjusts its transmission power accordingly. This closed-loop control ensures that transmission power is optimized based on actual network conditions, preventing both energy waste and excessive interference.
2Reliability
If transmission power is increased to ensure sufficient reception for all WLAN modules, then reliability of communication is improved, but interference with external WLAN networks worsens
Solution Approach 1:
The system dynamically adjusts the transmission power parameter to the minimum necessary level for maintaining reliable communication within the limited space. By reducing transmission power to an optimal level rather than using maximum power, the system minimizes harmful electromagnetic radiation and interference with external WLAN networks while preserving internal communication reliability.
Solution Approach 2:
The system creates a localized communication environment where transmission power is optimized specifically for the limited space containing the WLAN modules. The first WLAN module transmits at a power level sufficient for local modules but insufficient to cause significant interference outside the defined space, thereby achieving local quality optimization.
3Loss of energy
If transmission power is reduced to save energy and minimize interference, then energy efficiency is improved and interference is reduced, but reception quality for distant modules worsens
Solution Approach 1:
The system dynamically adjusts transmission power parameters based on the actual spatial distribution and reception capabilities of WLAN modules. Rather than using a fixed low power level, the first WLAN module adapts its transmission power to ensure that all modules, including those at greater distances, receive sufficient signal strength for reliable communication.
Solution Approach 2:
The system transitions from static transmission power settings to dynamic adjustment based on real-time network conditions. The first WLAN module continuously monitors reception feedback from other modules and adapts its transmission power accordingly, ensuring that reception quality is maintained across varying distances and conditions while minimizing energy waste.
4Loss of energy
If a reference WLAN module is added to monitor signal strength and enable power adjustment, then energy efficiency and interference reduction are improved, but device complexity increases
Solution Approach 1:
The reference WLAN module performs multiple functions: it acts as a normal WLAN module for data communication and simultaneously serves as a reference for monitoring signal strength and enabling power adjustment of the first module. This multi-functionality reduces the need for separate dedicated monitoring hardware, thereby limiting the increase in system complexity.
Solution Approach 2:
The system merges the reference monitoring function with the existing WLAN module infrastructure. The reference WLAN module is integrated into the network as a regular module that also performs the additional function of providing signal strength feedback, combining multiple functions into a single component to minimize the increase in overall system complexity.
Data Source
AI summary
A device for the power adjustment of a WLAN network in a bounded space including a first WLAN module in the space, which serves to communicate with at least one second WLAN module located in the space, and at least one reference WLAN module, wherein the reference WLAN module is designed so that WLAN signals from the first WLAN module are received and a signal intensity is determined and transferred to the first WLAN module, wherein the first WLAN module is designed so the transmission power of the first WLAN module is adjusted according to the transferred signal intensity from the reference WLAN module so the received signal intensity at the reference WLAN module is less than a specified threshold value. Also disclosed is a method for the power adjustment of a WLAN network in a bounded space.