Multi-AP Spatial Reuse Coordination With OBSS Power Detection
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Solution Overview
Problem
Existing multi-AP coordination schemes in wireless local area networks (WLANs) lack detailed implementation methods for achieving improved throughput and interference control through coordinated spatial reuse (CSR) under the IEEE 802.11be standard.
Innovation Solution
Proposed protocols and algorithms for multi-AP CSR that utilize measured interference levels and OBSS power detection to form spatial reuse groups, coordinate downlink and uplink transmissions, and apply TX power control and receiver interference cancellation to optimize spatial reuse and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-AP coordination schemes are implemented to improve throughput and interference control, then spatial reuse gain is enhanced, but device complexity and implementation difficulty increase due to lack of detailed implementation methods
Solution Approach 1:
The patent segments the multi-AP coordination system into distinct functional modules: OBSS PD parameter determination unit, spatial reuse group formation unit, and coordinated transmission unit. Each module handles specific tasks independently, making the overall complex system manageable and implementable through standardized procedures.
Solution Approach 2:
The patent introduces OBSS PD (Overlapping Basic Service Set Power Detection) parameters as adjustable variables that control the behavior of spatial reuse. By changing these parameters, the system can optimize performance under different conditions without requiring fundamental changes to the coordination mechanism, thus managing complexity while maintaining adaptability.
2Object-affected harmful factors
If OBSS power detection and interference measurement are performed to optimize spatial reuse, then interference control is improved, but measurement precision requirements and detection difficulty increase
Solution Approach 1:
The patent implements feedback mechanisms where APs continuously measure OBSS power levels and adjust their transmission parameters accordingly. The system uses measured interference levels from neighboring APs to dynamically control spatial reuse behavior, creating a closed-loop control system that improves interference management through adaptive responses rather than requiring ultra-precise static measurements.
Solution Approach 2:
The patent performs preliminary OBSS power detection and interference measurement before coordinated transmissions begin. By pre-assessing the interference environment and determining appropriate OBSS PD parameters in advance, the system reduces the need for real-time high-precision measurements during actual data transmissions, thereby lowering measurement precision requirements while maintaining effective interference control.
3Productivity
If spatial reuse groups are formed with multiple APs to enhance spatial reuse gain, then productivity increases, but device complexity increases due to coordination requirements
Solution Approach 1:
The patent applies homogeneity by treating all APs in the spatial reuse group with standardized coordination procedures and parameter settings. Rather than requiring custom coordination strategies for each AP pair, the system uses uniform OBSS PD parameter determination and coordinated transmission mechanisms across all participating APs, reducing coordination complexity through consistency.
Data Source
AI summary
An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.