Dynamic SU-MIMO MU-MIMO Switching for Wireless Performance
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Solution Overview
Problem
MU-MIMO transmission in wireless communications can be sensitive to STA mobility and have significant overhead, leading to lower transmission performance and increased power usage, making SU-MIMO a more favorable option for certain stations despite MU-MIMO's potential for higher aggregate throughput.
Innovation Solution
A standard compliant action frame is used by STAs to toggle between SU-MIMO and MU-MIMO transmissions based on preferences, including a MU toggle field to indicate preferred transmission methods, cause fields for reasons not to join MU-MIMO, and cost fields for the significance of these reasons, allowing the AP to determine the best transmission method based on network conditions and STA requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MU-MIMO transmission is used to increase network utilization and aggregate throughput, then network utilization is improved, but transmission performance for individual STAs deteriorates due to sensitivity to STA mobility and significant overhead
Solution Approach 1:
The patent implements dynamic switching between SU-MIMO and MU-MIMO transmission modes based on real-time network conditions and STA characteristics. The AP receives feedback from STAs about their preferred transmission type and dynamically adjusts the transmission mode, allowing the system to adapt to changing conditions such as STA mobility, thereby resolving the contradiction between maintaining high network utilization and ensuring reliable transmission performance.
Solution Approach 2:
The system changes the transmission mode parameter (SU-MIMO vs. MU-MIMO) based on STA feedback and network conditions. By allowing STAs to indicate their preference through feedback frames and the AP to adjust transmission parameters accordingly, the system optimizes both network utilization and individual transmission performance by selecting the appropriate MIMO mode for each scenario.
2Productivity
If MU-MIMO transmission is used to transmit data to multiple STAs simultaneously, then aggregate throughput is improved, but power usage increases due to additional channel sounding and beamforming feedback
Solution Approach 1:
The system enables STAs to self-determine their preferred transmission mode based on their own power consumption considerations and transmission performance requirements. STAs autonomously generate feedback indicating whether they prefer SU-MIMO or MU-MIMO, allowing them to optimize their own power usage without requiring complex centralized power management, thereby reducing overall system power consumption while maintaining high aggregate throughput.
3Productivity
If MU-MIMO transmission is used in dense environments with many STAs, then throughput to each STA is improved, but overhead increases leading to better performance with SU-MIMO for individual STAs
Solution Approach 1:
The patent implements a feedback mechanism where STAs indicate their preferred transmission mode (SU-MIMO or MU-MIMO) through feedback frames. The AP uses this feedback to determine the appropriate transmission mode for each STA. This feedback-driven approach allows the system to account for overhead considerations and select the transmission mode that optimizes throughput while minimizing unnecessary overhead for each individual STA scenario.
Data Source
AI summary
Disclosed herein are system, method, and computer program product embodiments for indicating a preference to receive a single-user multiple input multiple output (SU-MIMO) or multi-user multiple input multiple output (MU-MIMO) transmission from an access point (AP). Embodiments include generating a standard action frame that contains an action field that species a preference to receive a SU-MIMO or MU-MIMO transmission from the AP. A station (STA) can transmit the generated action frame to the AP. The STA can receive an acknowledgement frame from the AP that indicates the AP is configured to use the requested transmission method. The STA can then receive data from the AP using the requested transmission method.