Spatial Reuse via Joint Transmit Power and Detection Threshold Adjustment
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Solution Overview
Problem
In wireless networks, especially those operating under IEEE 802.11 standards, achieving efficient spatial reuse is challenging due to the growing density of devices and limited spectrum availability, leading to interference issues and reduced performance, particularly in dense environments where legacy devices and new protocols coexist.
Innovation Solution
The proposed solution involves adjusting the transmit power and packet detection thresholds for stations in overlapping basic service sets (OBSS) to reduce interference, allowing stations to reuse channels while ensuring protection for ongoing links, by implementing a mechanism that reduces transmit power and adjusts the number of stations that can reuse channels, potentially using a 'coin flip' condition to further limit access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit power is reduced to protect ongoing links, then interference to legacy devices is reduced, but spatial reuse efficiency deteriorates
Solution Approach 1:
The patent adjusts transmit power parameters dynamically based on channel conditions and device types. By changing power levels adaptively rather than using fixed reduction, the system protects ongoing links while maintaining sufficient spatial reuse capability.
Solution Approach 2:
Different transmit power levels are applied to different spatial locations and device types. Legacy devices receive enhanced protection through lower power transmission, while HEW devices can utilize higher power when appropriate, creating localized quality differences that resolve the contradiction.
2Productivity
If packet detection threshold is increased to allow more stations to reuse channels, then spatial reuse improves, but interference protection capability deteriorates
Solution Approach 1:
The packet detection threshold is adjusted dynamically based on channel conditions, device type, and spatial reuse requirements. This parameter change allows the system to optimize between spatial reuse capability and interference protection on a per-situation basis.
Solution Approach 2:
The threshold adjustment mechanism is dynamic rather than static. The system can adaptively change detection thresholds in response to varying channel conditions and traffic patterns, enabling both high spatial reuse when conditions permit and strong protection when needed.
3Productivity
If more stations are allowed to reuse channels simultaneously, then network throughput increases, but interference levels increase
Solution Approach 1:
Transmit power and detection threshold parameters are adjusted to enable more stations to access the channel simultaneously while controlling interference levels through coordinated parameter changes across the network.
Solution Approach 2:
The system uses feedback mechanisms to monitor interference levels and adjust channel access parameters accordingly. When interference exceeds thresholds, the system dynamically modifies transmission parameters to reduce interference while maintaining throughput.
Data Source
AI summary
An exemplary aspect is directed toward methods, apparatus, and systems related to spatial reuse with overlapping basic service set. A device may determine an overlapping basic service set (OBSS) associated with one or more access points. The device may then reduce a transmit power by a first margin. The device may then increase a packet detection threshold associated with the OBSS by a second margin. The device then sends an uplink data frame to at least one of the one or more access points.