Spatial Stream Allocation for MU-MIMO Capacity
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Solution Overview
Problem
Current wireless communication systems, such as those adhering to the IEEE 802.11ax standard, are limited to eight spatial streams for MU-MIMO, which may not meet the growing demands of wireless devices, as they restrict the number of spatial streams that can be used, leading to inefficiencies in communication resource utilization.
Innovation Solution
A wireless network and device configuration that supports up to 16 spatial streams for MU-MIMO communications, with each device allocated a minimum of two to a maximum of four spatial streams, utilizing a control information element to specify stream allocations efficiently, reducing communication overhead and optimizing spatial stream allocation tables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of spatial streams is restricted to eight for MU-MIMO communications, then compliance with governing wireless communication standards is maintained, but the network capacity and communication resource utilization are insufficient to meet the growing demands of wireless devices
Solution Approach 1:
The patent segments the spatial stream allocation into discrete units of 2, 3, or 4 streams per device, with a maximum of 16 total spatial streams. This segmentation allows flexible allocation that meets higher capacity demands while maintaining manageable configuration complexity through standardized allocation units.
Solution Approach 2:
The patent implements dynamic spatial stream allocation where the access point can flexibly assign between 2-4 spatial streams to each wireless device based on channel conditions and demand. This dynamic approach enables the system to adapt to growing device demands while optimizing resource utilization, resolving the contradiction between capacity and complexity.
2Productivity
If more spatial streams are allocated to increase network capacity, then communication resource utilization improves, but the overhead in spatial allocation tables increases
Solution Approach 1:
The patent applies local quality by tailoring the spatial stream allocation to individual device needs and channel conditions. Each device receives a customized allocation (2-4 streams) based on its specific requirements, optimizing resource utilization while minimizing unnecessary allocation information overhead for devices that don't require high stream counts.
Solution Approach 2:
The patent changes the allocation parameter structure by using compact indicators that specify the number of spatial streams (2, 3, or 4) rather than full configuration details. This parameter optimization maintains high communication resource utilization while reducing control information overhead in the allocation tables.
3Reliability
If each wireless device is allocated a minimum of two to a maximum of four spatial streams, then communication performance for each device is optimized, but the flexibility in allocation is reduced
Solution Approach 1:
The patent applies partial action by allocating a minimum of 2 spatial streams to each active device, ensuring adequate communication performance. The maximum of 4 streams per device provides sufficient capacity for most scenarios while maintaining flexibility. This partial allocation approach ensures reliability without over-allocating resources, balancing performance optimization with allocation flexibility.
Data Source
AI summary
In some examples, a first wireless device includes a network interface to communicate over up to 16 spatial streams in a wireless network with a plurality of wireless devices, and at least one processor configured to send a control information element that specifies, for each of a plurality of the wireless devices, a respective allocation of a minimum of two to a maximum of four spatial streams from the 16 spatial streams.