Spatial Reuse Transmission Control Under OBSS Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional spatial reuse (SR) techniques in wireless networks undesirably allow or restrict transmissions based on power levels, leading to interference or reduced throughput due to inadequate consideration of signal strength and noise levels at both the access point and associated stations.
Innovation Solution
A method and device for determining expected received signal strengths and noise floors at both the first and second wireless stations, allowing or disallowing transmissions based on specific signal strength ratios to minimize interference and maximize throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional spatial reuse techniques allow transmissions based on power levels, then wireless medium utilization is improved, but interference with TXOP owner transmissions occurs
Solution Approach 1:
The patent changes the decision parameter from simple power level thresholds to a composite metric comparing expected received signal strength ratios. Specifically, it compares the ratio of first expected received signal strength to (second expected received signal strength plus noise floor) against the ratio of third expected received signal strength to noise floor. This parameter transformation enables more accurate interference prediction while maintaining wireless medium utilization.
2Reliability
If conventional spatial reuse techniques restrict transmissions to prevent interference, then transmission reliability is improved, but wireless medium throughput is reduced
Solution Approach 1:
The patent incorporates feedback mechanisms where wireless devices measure and report received signal strength indicators (RSSI) and other channel conditions to the transmitting device. This feedback enables dynamic adjustment of transmission decisions based on actual channel conditions rather than static thresholds, thereby maintaining reliability while improving throughput through better resource utilization.
3Productivity
If spatial reuse transmissions are allowed without considering signal strength ratios, then transmission opportunities increase, but network performance degradation occurs
Solution Approach 1:
The patent performs preliminary calculations of expected received signal strengths and their ratios before making transmission decisions. By pre-computing these metrics and comparing them against threshold criteria, the system can proactively determine whether a spatial reuse transmission will benefit network performance, thereby increasing transmission opportunities only when they are likely to succeed.
Data Source
AI summary
This disclosure provides systems, methods and apparatuses for selectively using spatial reuse (SR) transmissions in the presence of an overlapping basic service set (OBSS) transmission. In some implementations, a wireless communication device may transmit data to another wireless communication device using SR packets in the presence of an OBSS transmission or interference only when the signal strength of SR packets received at the other wireless communication device is greater than an amount of signal degradation of the OBSS transmission caused by the SR transmission.