Selective Probe Response Suppression Based on SNR
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In crowded wireless environments, multiple access points respond to probe requests, leading to unnecessary probe responses that degrade communication performance by increasing overhead and collision probability, thereby reducing throughput and network utilization.
Innovation Solution
An access point selectively provides probe responses based on a signal-to-noise ratio (SNR) and a dynamically determined threshold value, which considers the number and SNR of neighboring access points, as well as estimated wireless coverage, to reduce unnecessary responses and improve communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all access points transmit probe responses to probe requests, then complete network coverage is maintained, but network overhead and collision probability increase
Solution Approach 1:
The access point changes the parameter of probe response transmission by introducing an SNR threshold criterion. Instead of transmitting probe responses unconditionally, the access point evaluates the SNR of received probe requests and selectively transmits probe responses only when the SNR exceeds the threshold, thereby reducing unnecessary transmissions and network overhead while maintaining coverage for legitimate clients
Solution Approach 2:
The system implements feedback by using the SNR measurement of probe requests to control probe response transmission. The access point continuously monitors SNR levels and adjusts its probe response behavior based on this feedback, creating a closed-loop control mechanism that adapts to current wireless conditions
2Adaptability or versatility
If all access points transmit probe responses to probe requests, then all devices can be reached, but throughput decreases due to increased collisions
Solution Approach 1:
The access point modifies the transmission behavior parameter by introducing SNR-based selective response. Probe responses are transmitted only when SNR > threshold, which reduces the number of simultaneous transmissions in crowded environments, thereby decreasing collision probability and improving overall network throughput while still reaching all legitimate devices
3Ease of operation
If probe responses are transmitted without SNR filtering, then all probe requests are acknowledged, but network utilization decreases
Solution Approach 1:
The system changes the operational parameter of probe response transmission by adding an SNR threshold filter. This ensures that probe requests are acknowledged selectively based on signal quality, reducing unnecessary acknowledgments from distant or interfering access points, thereby improving network utilization while maintaining ease of operation for valid connections
Data Source
AI summary
An access point that selectively provides a probe response is described. During operation, the access point may receive a probe request associated with an electronic device. In response, the access point may selectively provide the probe response based at least in part on a signal-to-noise ratio (SNR) associated with the probe request and a threshold value. For example, the probe response may be provided when the SNR is greater than the threshold value, and otherwise the probe request may be discarded or ignored. Moreover, the access point may dynamically determine the threshold value based at least in part on: one or more other access points that are in wireless communication range of the access point; SNRs associated with the one or more other access points; and/or an estimated wireless coverage provided by the one or more other access points.