Multi-Link Device Channel Sounding Optimization
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Solution Overview
Problem
Current Wi-Fi technologies face challenges in optimizing channel sounding procedures for multi-link devices, leading to inefficiencies in beamforming and data transmission, particularly in environments requiring high data throughput and low latency.
Innovation Solution
The proposed solution involves an improved channel sounding procedure where a multi-link device (MLD) initiates channel sounding on one link while receiving feedback from a subgroup of receivers on the same link and another distinct link, leveraging the capability to communicate on multiple physical communication links, thereby optimizing the channel sounding process by offloading some of the sounding process to a different radio link within the same association context.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel sounding is performed on a single link, then the procedure is simpler to implement, but system throughput is limited and transmission latency increases
Solution Approach 1:
The patent divides the channel sounding process into segments across multiple links. The MLD performs channel sounding on a first link with a first group of receivers and simultaneously on a second link with a second group of receivers, allowing parallel processing and improved throughput without overwhelming complexity
Solution Approach 2:
The patent extends the channel sounding procedure from a single-link (one-dimensional) approach to a multi-link (multi-dimensional) approach by utilizing multiple communication links simultaneously, thereby increasing system capacity and reducing latency through spatial parallelism
2Loss of time
If channel sounding is performed across multiple links simultaneously, then transmission latency is reduced, but the complexity of coordinating feedback reception increases
Solution Approach 1:
The patent segments the feedback reception process by assigning different receiver groups to different links. The MLD receives feedback from the first group of receivers on the first link and from the second group of receivers on the second link, organizing complexity through structured segmentation
Solution Approach 2:
Each link independently handles its own feedback reception process. The MLD autonomously manages feedback from each receiver group on their respective links without requiring complex cross-link coordination, allowing each link to serve itself in the feedback process
3Measurement precision
If beamforming is optimized using traditional single-link sounding, then implementation is straightforward, but beamforming accuracy deteriorates in multi-link environments
Solution Approach 1:
The patent creates a universal channel sounding framework that functions across multiple links simultaneously. The MLD performs channel sounding that is applicable to both links, obtaining comprehensive channel state information that improves beamforming accuracy for multi-link operations while maintaining a unified implementation approach
Data Source
AI summary
A system and method for optimizing a channel sounding procedure of a multi-link device (MLD) is disclosed. The improved channel sounding procedure disclosed herein involves an MLD requesting channel sounding information from a group of receivers on a first channel representing a first physical frequency, but receiving channel sounding information from a subgroup of the receivers on one or more other channels representing different physical frequencies. In this manner, the channel sounding procedure on a specific link of an MLD is optimized by offloading some of the sounding process to a different radio link that is also operational for the MLD as part of the same association context.