Coordinated AP Transmission Framework for Beamforming and Spatial Reuse
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Solution Overview
Problem
Existing wireless communication networks face challenges in efficiently coordinating resource allocation and transmission modes to optimize performance under varying channel conditions and interference scenarios, particularly in environments with multiple access points and stations.
Innovation Solution
A unified framework for coordinated transmission modes, including coordinated beamforming (CBF), coordinated spatial reuse (CSR), and dedicated TXOP, enables dynamic selection and utilization of transmission modes based on channel measurements and capabilities, facilitating improved communication performance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If coordinated transmission modes are implemented among multiple access points, then spectral efficiency and system capacity are improved, but device complexity and coordination overhead increase
Solution Approach 1:
The patent introduces a unified framework that acts as an intermediary coordination mechanism among multiple access points. This framework standardizes the coordination process through defined message exchanges (coordinated trigger request frames and response frames), enabling APs to cooperate for coordinated beamforming and spatial reuse without requiring complex ad-hoc negotiation protocols, thus improving system capacity while controlling coordination complexity.
Solution Approach 2:
The framework enables dynamic parameter changes in transmission modes by allowing APs to exchange capability information and operational parameters through standardized frames. This allows the network to adapt coordination parameters (such as beamforming vectors, spatial reuse factors) based on current channel conditions and AP capabilities, optimizing system capacity without permanent complex configurations.
2Reliability
If dynamic transmission mode selection is implemented based on channel measurements, then communication performance and reliability are improved, but measurement and processing requirements increase
Solution Approach 1:
The patent implements preliminary channel measurements through coordinated sounding procedures where access points transmit sounding frames before actual data transmission. This preliminary action allows STAs to measure channel state information in advance, and APs to exchange this measurement information through standardized frames, enabling reliable transmission mode selection without requiring complex real-time measurements during data transmission.
Solution Approach 2:
The framework establishes feedback mechanisms where channel measurement results are exchanged between APs and STAs through standardized message formats. This feedback enables dynamic transmission mode selection based on actual channel conditions, improving communication reliability while keeping measurement requirements manageable through structured feedback protocols rather than continuous complex monitoring.
3Productivity
If coordinated beamforming and spatial reuse are utilized, then data rates and spectral efficiency are enhanced, but interference management complexity increases
Solution Approach 1:
The patent segments the interference management function into distinct coordinated transmission modes (coordinated beamforming mode and spatial reuse mode) that can be independently selected and configured. This segmentation allows the system to apply appropriate interference management techniques for each mode through standardized coordination frames, enhancing data rates without requiring a single complex universal interference management solution.
Solution Approach 2:
The framework enables dynamic switching between different transmission modes (coordinated beamforming, spatial reuse, or dedicated TXOP) based on current network conditions and AP capabilities. This dynamics allows the system to optimize data rates by selecting the most appropriate mode for each scenario while keeping interference management complexity manageable through mode-specific protocols rather than continuously complex adaptation.
Data Source
AI summary
This disclosure provides methods, components, devices and systems for using a unified framework for coordinated transmission modes, such as a coordinated beamforming (CBF) mode, a coordinated spatial reuse (CSR) transmission mode, and a dedicated transmission opportunity (TXOP) transmission mode. Some aspects more specifically relate to a sharing and shared access point (AP) exchanging communications that facilitate the utilization of a transmission mode. In some implementations, a first AP may transmit, to a second AP, a trigger message that includes an indication of a first station (STA) to be scheduled during a TXOP. The second AP may respond with an indication of whether the second AP can attenuate a transmit signal to the first STA to facilitate the CBF mode. The first STA may proceed with communications via the CBF mode, CSR mode, or dedicated mode in accordance with whether the second AP can attenuate the signal, among other considerations.