Dual-Threshold Carrier Sense for Interference Detection
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Solution Overview
Problem
In near-field wireless communication, it is challenging to determine whether errors in transmission/reception processing are due to interference or other factors, especially when using high sensitivity carrier sense thresholds, which can lead to incorrect interference detection and inefficient error handling.
Innovation Solution
Implementing a two-level carrier sense mechanism with different thresholds to differentiate between idle and busy states, allowing for accurate determination of interference by comparing busy determination times using both the first and second carrier sense thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a high sensitivity carrier sense threshold is used to enable near-field communication, then connection facilitation is improved, but interference detection accuracy deteriorates
Solution Approach 1:
The patent segments the carrier sense mechanism into two distinct levels: a first carrier sense threshold for connection facilitation and a second carrier sense threshold for interference detection. This segmentation allows each threshold to serve its specific function independently, resolving the contradiction between connection ease and detection accuracy.
Solution Approach 2:
The patent applies different sensitivity levels (qualities) to different detection purposes: high sensitivity for connection establishment and low sensitivity for interference detection. This local quality differentiation enables the system to optimize for each specific function without compromise.
2Device complexity
If a single carrier sense threshold is used, then device complexity is reduced, but the ability to differentiate error causes deteriorates
Solution Approach 1:
The patent divides the error detection capability into two segments: one for detecting connection-related issues and another for detecting interference-related issues. This segmentation enables accurate error cause differentiation while maintaining manageable system complexity through modular design.
Solution Approach 2:
The patent performs preliminary carrier sense checks using both thresholds before transmission to establish a baseline state. This preliminary action enables the system to compare pre- and post-transmission states and accurately determine error causes without requiring complex real-time analysis.
3Measurement precision
If carrier sense is performed continuously to improve interference detection, then power consumption increases
Solution Approach 1:
The patent implements periodic carrier sense checks at specific intervals (before transmission, during transmission, and after transmission) rather than continuous monitoring. This periodic action maintains adequate interference detection capability while significantly reducing power consumption compared to continuous monitoring.
Data Source
AI summary
According to one embodiment, a wireless communication apparatus is provided with first and second determination units. The first unit determines based on a first carrier sense threshold whether busy state or not and specifies a first time when busy state is determined with the first threshold, and determines based on a second carrier sense threshold smaller than the first threshold whether busy state or not and specifies a second time when busy state is determined. The second unit determines, if at least busy state is determined based on the second threshold and the second time precedes a reference time equal to or earlier than the first time, to perform processing for avoiding interference.