Spatial Reuse Indication for Dense-Network Interference Control
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Solution Overview
Problem
In highly dense wireless network deployments, the network throughput is insufficient due to mutual interference between wireless access devices and terminal devices, leading to inadequate communication performance.
Innovation Solution
Implement a spatial reuse indication method that limits the range of nodes in spatial reuse to a spatial reuse group, using a spatial reuse limitation indication and group indication to reduce the number of nodes participating in spatial reuse, thereby minimizing interference and improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spatial reuse is allowed for all nodes in overlapping basic service sets, then network throughput can be improved in dense deployments, but mutual interference between nodes increases and system performance deteriorates
Solution Approach 1:
The patent divides the overlapping basic service sets into multiple spatial reuse groups, where each group contains one or more BSSs. By segmenting the node population into distinct groups, the patent enables spatial reuse to be applied selectively within groups rather than universally across all nodes, thereby reducing mutual interference while maintaining throughput improvements in dense deployments
2Object-affected harmful factors
If spatial reuse is restricted only to nodes in the same basic service set, then mutual interference is reduced, but the ability to improve throughput in dense deployments is limited
Solution Approach 1:
The patent creates spatial reuse groups that can include multiple BSSs, allowing nodes from different BSSs to be grouped together. This segmentation approach enables controlled spatial reuse across BSS boundaries while maintaining interference management, thus improving throughput in dense deployments without causing uncontrolled interference
3Productivity
If spatial reuse is enabled without group limitations, then more nodes can participate in spatial reuse increasing throughput, but the complexity of managing interference and coordination increases
Solution Approach 1:
The patent introduces spatial reuse groups as organizational units that simplify management. Each group is identified by a group ID, and nodes within groups can perform spatial reuse with simplified rules. This segmentation reduces the complexity of managing spatial reuse across all nodes by providing a structured framework that limits coordination requirements to within-group interactions
Data Source
AI summary
Embodiments of this application disclose a spatial reuse indication method and a wireless communications apparatus, thereby reducing a quantity of nodes that can participate in spatial reuse, reducing mutual interference between nodes in spatial reuse, and improving spatial reuse system performance. The method in some implementations includes a first access point generates a spatial reuse limitation indication and a spatial reuse group indication. The spatial reuse limitation indication can be used to indicate whether only a node in a spatial reuse group is allowed for spatial reuse and to indicate the spatial reuse group. The spatial reuse group includes one or more basic service sets. The first access point sends the spatial reuse limitation indication and the spatial reuse group indication.