Wi-Fi Spatial Reuse Feedback for OBSS Interference Errors
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Solution Overview
Problem
In conventional Spatial Reuse (SR) processing, communication errors occur due to undesired signals with higher strength from other apparatuses in an Overlapping Basic Service Set (OBSS), leading to unstable communication as the cause of errors cannot be appropriately determined.
Innovation Solution
A communication apparatus that includes a processor to detect interference and notify the transmitting apparatus of reception errors based on signal strengths, allowing adjustments such as changing modulation or prohibiting Spatial Reuse (SR) to improve reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Spatial Reuse (SR) processing is enabled to improve wireless medium efficiency in OBSS environments, then communication productivity increases, but communication reliability deteriorates due to reception errors caused by stronger interfering signals from other BSSs
Solution Approach 1:
The receiving apparatus feeds back information about received signals and detected errors to the transmitting apparatus. This feedback mechanism enables the transmitting apparatus to adjust its transmission parameters (such as power level or modulation scheme) based on actual reception conditions, thereby maintaining reliability while preserving SR benefits.
Solution Approach 2:
The system dynamically adjusts transmission parameters based on real-time signal strength measurements and error detection. The transmitting apparatus modifies its operation characteristics (power, modulation, coding) according to the feedback information, enabling adaptive communication that maintains both efficiency and reliability under varying OBSS conditions.
2Device complexity
If SR processing is performed to enable simultaneous communication in overlapping BSSs, then device complexity is reduced, but measurement precision of signal strength and error detection deteriorates
Solution Approach 1:
The receiving apparatus performs multiple functions using the same hardware: it detects signal strength for SR decisions, identifies error conditions, and provides feedback to the transmitter. This multi-functional approach maintains measurement precision without increasing device complexity, as a single receiving unit handles all measurement and detection tasks.
3Loss of time
If SR processing is enabled to improve throughput in OBSS environments, then loss of time is reduced, but loss of information increases due to undetected reception errors
Solution Approach 1:
The feedback mechanism enables error detection and correction by informing the transmitting apparatus of reception failures. This allows for retransmission of corrupted packets, preventing information loss while maintaining the time efficiency benefits of SR processing through rapid error notification and correction.
Data Source
AI summary
A communication apparatus that executes communication compliant with IEEE 802.11, the communication apparatus includes a first receiving unit configured to receive at least part of a first communication frame including information indicating that Special Reuse (SR) is allowed, the first communication frame having been transmitted by a first different communication apparatus, a detecting unit configured to detect a second communication frame that interferes with reception of the first communication frame, the second communication frame having been transmitted by a second different communication apparatus, and a notifying unit configured to notify the first different communication apparatus of an error in reception of the first communication frame, based on a signal strength of the signal received by the first receiving unit and a signal strength of the second communication frame detected by the detecting unit.