WLAN Spatial Reuse Transmission Power Control for Overlapping BSSs
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Solution Overview
Problem
In densely populated wireless LAN environments, interference and collisions between access points and electronic devices occur due to the independent and competitive nature of wireless LAN communication, leading to decreased performance and increased power consumption.
Innovation Solution
An electronic device is equipped with a processor that optimizes antenna transmission power during overlapping basic service set-packet detection (OBSS-PD) spatial reuse transmission by determining an optimal value based on received signals from adjacent BSSs, adjusting transmission power to minimize interference and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to improve communication reliability, then signal quality improves, but interference to adjacent BSSs increases and power consumption increases
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on the received signal strength from adjacent BSSs. When the received signal strength indicator (RSSI) from adjacent BSS is below a threshold, the device transmits at a first power level; when RSSI exceeds the threshold, transmission is suspended. This parameter-based control resolves the contradiction by adapting transmission power to environmental conditions.
Solution Approach 2:
The patent implements a feedback mechanism where the device continuously monitors the RSSI from adjacent BSSs and adjusts its transmission behavior accordingly. The processor receives signals from adjacent BSS, evaluates the signal strength, and provides feedback control on whether to transmit and at what power level, thereby preventing interference while maintaining communication reliability.
2Reliability
If transmission power is increased to ensure successful signal delivery, then communication performance improves, but power consumption increases
Solution Approach 1:
The patent changes transmission power parameters dynamically based on channel conditions. By monitoring RSSI from adjacent BSS and comparing it against thresholds, the system adjusts transmission power to the minimum necessary level to ensure successful delivery, avoiding unnecessary high-power transmissions and reducing overall power consumption.
Solution Approach 2:
The patent introduces dynamic transmission power adjustment rather than using a fixed power level. The transmission power is adapted in real-time based on the received signal strength from adjacent BSS, allowing the system to optimize the balance between reliable signal delivery and power consumption according to current environmental conditions.
3Ease of operation
If multiple access points operate independently and competitively, then each access point can secure transmission opportunities, but interference and collisions increase leading to decreased overall performance
Solution Approach 1:
The patent uses the received signal strength from adjacent BSS as an intermediary indicator to coordinate transmission decisions. By monitoring the RSSI from neighboring access points and using it as a basis for transmission control, the system enables indirect coordination between independently operating access points, reducing collisions while preserving operational independence.
Data Source
AI summary
An electronic device is provided. The electronic device includes an antenna, a communication module configured to support wireless local area network (LAN) communication, memory storing one or more computer programs; and a processor communicatively coupled to the antenna, the communication module, and the memory, wherein the one or more computer programs include computer-executable instructions that, when executed by the processor, cause the electronic device to perform wireless LAN communication by being connected to a first access point of a first basic service set (BSS) by using the communication module, receive a signal transmitted from at least one device belonging to a second BSS having coverage of which at least portion overlaps the coverage of the first BSS while connected to the first access point, identify whether spatial reuse transmission to the first access point is possible in an environment in which the first BSS and the second BSS overlap each other based on the signal received from the second BSS, determine an optimal value of transmission power of the antenna during the spatial reuse transmission in case that the spatial reuse transmission is possible, and perform spatial reuse transmission to the first access point by using the antenna according to the determined optimal value of the transmission power, wherein the one or more computer programs further include computer-executable instructions that, when executed by the processor, in order to determine the optimal value of the transmission power of the antenna, cause the electronic device to configure an initial value of the transmission power of the antenna, transmit a signal to the first access point through the antenna with a transmission power lower than the initial value in case that a signal transmission with the transmission power of the initial value to the first access point is successful, and determine the optimal value of the transmission power based on the transmission power at previous successful signal transmission in case that the signal transmission to the first access point fails.