Coordinated Spatial Reuse via Service Period Signaling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing service periods for coordinated spatial reuse across different basic service sets (BSSs), leading to interference issues and reduced system capacity.
Innovation Solution
The proposed solution involves a method where a first wireless device associated with a first BSS transmits control messages to a second wireless device associated with a second BSS, indicating service periods designated for spatial reuse and an interference threshold. This allows the second BSS to communicate with its associated devices during these service periods, adjusting transmission powers to maintain acceptable interference levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple BSSs transmit simultaneously without coordination, then system capacity and resource utilization improve, but interference between BSSs increases and communication reliability deteriorates
Solution Approach 1:
The patent implements periodic service periods with alternating phases: spatial reuse periods where multiple BSSs can transmit simultaneously, and non-spatial reuse periods where transmissions are restricted. This periodic switching enables system capacity improvement during spatial reuse periods while maintaining communication reliability during non-spatial reuse periods, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent dynamically adjusts transmission parameters including power levels, service period configurations, and spatial reuse eligibility based on real-time channel conditions and interference levels. This dynamic adaptation allows the system to optimize capacity when conditions permit while ensuring reliability when interference becomes problematic, balancing the contradiction between system capacity and communication reliability.
2Productivity
If transmission power is increased to improve data rates, then spectral efficiency improves, but interference to other BSSs increases
Solution Approach 1:
The patent applies different transmission power levels and spatial reuse permissions to different BSSs based on their local channel conditions, geographic location, and interference environment. BSSs experiencing low interference can transmit at higher powers for improved data rates, while BSSs in interference-prone areas use lower powers, thus achieving high data rates where possible without generating excessive interference elsewhere.
Solution Approach 2:
The patent changes transmission parameters including power levels, modulation schemes, and service period allocations based on channel conditions. During spatial reuse periods, parameters are optimized for high data rates; during non-spatial reuse periods or when interference thresholds are exceeded, parameters are adjusted to reduce interference, thereby resolving the contradiction between data rates and interference generation.
3Productivity
If spatial reuse is allowed continuously to improve resource utilization, then spectral efficiency improves, but interference management complexity increases
Solution Approach 1:
The patent segments the transmission timeline into distinct service periods: spatial reuse periods where multiple BSSs can transmit, and non-spatial reuse periods with restricted transmissions. This segmentation simplifies interference management by creating predictable transmission patterns and clear boundaries, reducing the complexity of coordinating continuous spatial reuse while maintaining high spectral efficiency during designated spatial reuse periods.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for service period based coordinated spatial reuse. Some aspects relate to long term signaling to reduce the amount of signaling while achieving the gain associated with coordinated spatial reuse as compared to distributed spatial reuse. A first wireless device associated with a first basic service set (BSS) may transmit a beacon indicating a set of service periods designated for spatial reuse and an interference threshold. A second wireless device associated with a second BSS may receive the beacon and may communicate with one or more other wireless devices associated with the second BSS during the set of service periods designated for spatial reuse in accordance with the indicated interference threshold. Accordingly, the wireless devices in the second BSS may communicate at a power level that causes an acceptable level of interference at the first BSS.