Wireless Apparatus Dynamic CCA Threshold for Overlapping BSS Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The reliability of wireless communication is compromised due to decreased throughput and increased transmission delay in scenarios where multiple basic service sets (BSSs) using the same frequency channel overlap, leading to interference issues.
Innovation Solution
A wireless apparatus that includes a reception unit to receive frames with identification information for priority levels and a carrier sensing control unit to determine a threshold based on this information, allowing for accurate channel usage state determination and reduced interference by adjusting the clear channel assessment (CCA) threshold accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple BSSs use the same frequency channel, then spectrum utilization is improved, but interference increases and communication reliability deteriorates
Solution Approach 1:
The patent applies local quality by setting different CCA thresholds for different priority levels of frames. High-priority frames use a first threshold while low-priority frames use a second threshold, allowing differentiated channel access based on local frame characteristics rather than a uniform threshold across all traffic types.
Solution Approach 2:
The patent changes the CCA threshold parameter based on frame priority identification information. The carrier sensing control unit determines whether to apply a first threshold or second threshold by examining the priority level in the received frame, dynamically adjusting the sensing parameter to balance spectrum utilization and communication reliability.
2Measurement precision
If CCA threshold is lowered to detect more frames, then interference detection is improved, but transmission delay increases due to more frequent channel deferrals
Solution Approach 1:
The patent makes the CCA threshold dynamic by adjusting it based on frame priority. The carrier sensing control unit selects between a first threshold and a second threshold depending on the priority level identified in the frame, allowing the system to adapt threshold sensitivity to traffic requirements rather than using a static threshold.
Solution Approach 2:
The patent applies partial action by using a more sensitive threshold (first threshold) only for high-priority frames that require accurate interference detection, while using a less sensitive threshold (second threshold) for low-priority frames where excessive sensitivity would cause unnecessary delays. This selective application optimizes the balance between detection accuracy and transmission timing.
Data Source
AI summary
A wireless apparatus according to one aspect of the present invention includes a reception unit configured to receive, on a frequency channel, a frame including first identification information for identifying the priority level of the frame, and a carrier sensing control unit configured to determine a threshold based on the first identification information, and determine a usage state of the frequency channel based on a comparison between received power of the frame and the determined threshold.