Multi-AP Multi-Link Coordination for Joint Channel Sounding
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Solution Overview
Problem
Access point multi-link device (AP MLD) capabilities fail to meet transmission requirements, necessitating improvements for enhanced performance.
Innovation Solution
Implement multi-AP MLD joint channel sounding, coordinated transmission, data sharing, and seamless roaming through coordinated communication methods involving AP and non-AP MLDs, utilizing functional modules and computer programs to manage channel sounding, data re-mapping, and transmission parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional single AP MLD capability is used, then device simplicity is maintained, but transmission requirements cannot be met
Solution Approach 1:
Multiple AP MLDs are merged into a coordinated transmission system where they work together as a unified entity. The patent establishes coordination mechanisms including joint channel sounding, coordinated uplink multi-user multiple-input multiple-output (MU-MIMO), and coordinated orthogonal frequency-division multiple access (OFDMA) to enable multiple AP MLDs to function collectively, thereby enhancing transmission capability while managing complexity through standardized protocols.
Solution Approach 2:
The system segments transmission functions across multiple AP MLDs, allowing each AP MLD to handle specific users or data streams independently while contributing to overall system performance. This segmentation enables parallel processing of multiple users through coordinated uplink MU-MIMO and coordinated OFDMA, improving productivity without requiring each individual AP MLD to handle all transmissions alone.
2Reliability
If multi-AP MLD coordinated transmission is implemented, then transmission performance is improved, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where AP MLDs exchange channel state information and transmission status to coordinate their actions. Through joint channel sounding, each AP MLD receives feedback about channel conditions from non-AP MLDs, and this feedback is used to adjust transmission parameters dynamically, ensuring reliable communication while managing coordination complexity through structured information exchange protocols.
Solution Approach 2:
The system dynamically changes transmission parameters such as modulation and coding schemes, resource allocation, and beamforming weights based on channel conditions and coordination requirements. These parameter adjustments enable the system to adapt to varying conditions while maintaining reliability, with the complexity managed through standardized parameter sets and coordination protocols defined in the patent.
3Measurement precision
If joint channel sounding is performed by multiple AP MLDs, then channel information accuracy is improved, but signaling overhead increases
Solution Approach 1:
Multiple AP MLDs merge their channel sounding operations into a coordinated process where they simultaneously or sequentially sound channels and aggregate the results. This joint channel sounding approach improves channel information accuracy by combining measurements from multiple AP MLDs while reducing total signaling overhead compared to independent sounding by each AP MLD, as the coordination allows for more efficient information exchange and result aggregation.
Data Source
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AI summary
A wireless communication method and a device are provided. As such, it is possible to realize multi-access point multi-link device (AP MLD) joint channel sounding, multi-AP MLD coordinated transmission, data sharing between multiple AP MLDs, and/or seamless roaming of a non-AP MLD.