Distributed MU-MIMO Resource Sharing via Unused BSS Indication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently utilizing unused resources across multiple basic service sets (BSSs) to enhance data throughput and reduce interference, particularly in distributed multi-user multiple-input multiple-output (MU-MIMO) systems.
Innovation Solution
The system generates and transmits frames indicating unused resources within one BSS to other BSSs, allowing for coordinated beamforming and resource sharing, thereby enabling simultaneous transmissions and receptions across multiple BSSs, reducing interference and optimizing spatial and frequency resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple BSSs operate independently using traditional resource allocation, then each BSS maintains simple operation and control, but unused resources cannot be shared and data throughput is limited
Solution Approach 1:
The patent introduces a coordination mechanism where one BSS acts as a master and others as slaves, with the master BSS receiving resource availability information from slave BSSs and coordinating resource sharing. This intermediary coordination structure enables resource sharing across BSSs while maintaining manageable complexity through hierarchical control.
Solution Approach 2:
The patent enables BSSs to serve multiple functions - each BSS can operate independently for its primary coverage area while simultaneously sharing unused resources with other BSSs. The resource sharing mechanism allows the same physical infrastructure to serve both local and neighboring BSS requirements, increasing overall system productivity.
2Productivity
If unused resources are shared across multiple BSSs, then resource utilization improves and throughput increases, but interference management becomes more complex
Solution Approach 1:
The patent applies different resource allocation strategies to different spatial locations and BSSs. Each BSS identifies its specific unused resources and shares them selectively with neighboring BSSs based on local conditions. This localized approach to resource sharing allows optimization for each BSS's specific environment while managing interference on a per-BSS basis.
Solution Approach 2:
The patent converts the potentially harmful effect of unused resources (which represent wasted capacity) into a beneficial resource that can be shared with neighboring BSSs. By identifying and sharing these previously idle resources, the system transforms what would be empty spectrum into useful capacity for other BSSs, improving overall utilization while the coordination mechanism manages any resulting interference.
3Productivity
If coordinated beamforming is implemented across multiple BSSs, then spatial resource optimization improves, but the complexity of transmit precoding and channel state information management increases
Solution Approach 1:
The patent segments the coordinated beamforming process into distinct functional components: channel state information collection at each BSS, resource availability identification, coordination signaling between master and slave BSSs, and transmit precoding application. This segmentation allows each component to be managed independently, reducing the overall complexity of implementing coordinated beamforming across multiple BSSs.
Data Source
AI summary
Certain aspects relate to methods and apparatus for wireless communication. The apparatus generally includes a processing system configured to generate a first frame including an indication of unused resources in a first basic service set (BSS) available to be shared with one or more wireless nodes in one or more second BSSs. The apparatus also includes a first interface configured to output the first frame for transmission to the one or more wireless nodes.