Coordinated Beamforming CSI Feedback for Multi-BSS Interference
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing interference and optimizing channel state information (CSI) feedback in coordinated beamforming (CoBF) across multiple access points (APs) and stations (STAs) in wireless local area networks (WLANs, particularly in scenarios involving multiple BSSs, leading to suboptimal performance and increased interference.
Innovation Solution
The proposed methods involve outputting packets to solicit CSI feedback from multiple wireless stations, compressing the feedback, and providing it to other nodes to enhance coordinated beamforming by optimizing CSI processing and reducing interference through techniques like joint NDPs and enhanced CSI feedback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If CSI feedback is collected from multiple wireless stations in coordinated beamforming scenarios, then interference mitigation capability is improved, but feedback overhead and processing complexity increase
Solution Approach 1:
The patent segments the CSI feedback collection process by having different wireless stations provide feedback for different channels. Specifically, a first wireless station provides CSI feedback for a first channel while a second wireless station provides CSI feedback for a second channel, allowing distributed collection of interference information without requiring all stations to report all channels.
Solution Approach 2:
The patent introduces a first wireless node as an intermediary that collects, compresses, and relays CSI feedback between multiple wireless stations and wireless nodes. This intermediary consolidates the feedback information and performs compression before providing it to the second wireless node, reducing the overall feedback overhead in the network.
2Measurement precision
If CSI feedback from multiple wireless stations is collected for coordinated beamforming, then beamforming coordination accuracy is improved, but system complexity increases
Solution Approach 1:
The system divides the CSI feedback collection into segmented tasks where different wireless stations are responsible for different channels. This segmentation allows each station to perform simpler measurements while the overall system achieves comprehensive coverage through coordination.
Solution Approach 2:
The first wireless node acts as an intermediary that manages the complexity of coordinating multiple wireless stations. It consolidates feedback from multiple stations, performs compression, and relays information to the second wireless node, thereby managing system complexity centrally while enabling distributed measurements.
3Productivity
If compressed CSI feedback is provided between wireless nodes, then feedback transmission efficiency is improved, but compression processing complexity increases
Solution Approach 1:
The first wireless node serves as an intermediary that performs the compression processing of CSI feedback before relaying it to the second wireless node. This centralizes the computationally intensive compression task at a specific node, improving transmission efficiency while concentrating processing complexity at the intermediary rather than distributing it across all nodes.
Data Source
AI summary
Certain aspects of the present disclosure provides a method for wireless communication performable at a first wireless station, generally including obtaining one or more packets from a first wireless node and at least one second wireless node, wherein the wireless station and first wireless node are associated with a first basic service set (BSS) and the second wireless node is associated with a second BSS, generating channel state information (CSI) feedback, based on the one or more packets, for a first channel between the wireless station and the first wireless node and for a second channel between the wireless station and the second wireless node, and providing the CSI feedback to at least the first wireless node.