MU-MIMO Bandwidth Allocation for Wireless Network Throughput
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Solution Overview
Problem
Conventional MU-MIMO communication in wireless networks is limited by the requirement for each station to have the same available bandwidth, leading to congestion and decreased throughput when stations have different bandwidths, as only the shared bandwidth is utilized, resulting in inefficient use of available resources.
Innovation Solution
A networking device determines the available bandwidth for each station and assigns unique bandwidths and spatial streams, allowing partial overlap and differing assignments, generating a data packet that indicates these allocations to enable simultaneous MU-MIMO communication, thereby optimizing bandwidth utilization across all stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sequential SU-MIMO communication is used to maintain compatibility with existing networks, then device complexity is reduced, but network throughput and data communication speed decrease when multiple stations are present
Solution Approach 1:
The patent segments the available bandwidth into multiple sub-bands and assigns different spatial streams to different stations within each sub-band. This segmentation enables simultaneous multi-user communication while maintaining manageable device complexity through structured resource allocation.
Solution Approach 2:
The patent introduces a new dimension of communication by enabling simultaneous transmissions across multiple spatial streams and frequency sub-bands. This transforms the single-user sequential communication model into a multi-user parallel communication system, significantly improving network throughput.
2Adaptability or versatility
If bandwidth is restricted to the shared available bandwidth of all stations, then compatibility with stations of different bandwidths is improved, but bandwidth utilization efficiency deteriorates
Solution Approach 1:
The patent applies local quality by assigning different bandwidth portions to different stations based on their individual capabilities. Each station receives bandwidth allocation optimized for its specific requirements, allowing simultaneous operation at different bandwidth levels without restricting any single station to the minimum common bandwidth.
Solution Approach 2:
The patent changes the bandwidth parameter dynamically by allowing stations to operate at different bandwidth levels simultaneously. The system adjusts bandwidth allocation per station based on available resources and station capabilities, transforming the fixed shared bandwidth model into a flexible variable bandwidth system.
3Productivity
If the same spatial streams are assigned to multiple stations, then device complexity is reduced, but communication reliability and throughput deteriorate due to interference
Solution Approach 1:
The patent introduces asymmetry in spatial stream assignment by allocating different spatial streams to different stations. This asymmetric allocation eliminates interference between simultaneous transmissions while maintaining systematic resource management, thereby improving both throughput and reliability.
Data Source
AI summary
A wireless network includes a networking device and various stations. The networking device determines an available bandwidth of each station of the wireless network. Further, the networking device assigns a bandwidth and at least one spatial stream to each station. The bandwidth assigned to each station is less than or equal to the available bandwidth of the corresponding station. Further, the bandwidth assigned to one station is different from and partially overlaps with the bandwidth assigned to another station. Similarly, the spatial stream assigned to one station is different from the spatial stream assigned to another station. The networking device generates a data packet indicative of the bandwidth and the spatial stream assigned to each station of the wireless network, and transmits the data packet to each station to enable multi-user multiple-input-multiple-output (MU-MIMO) communication between the networking device and the stations.