MU-MIMO Tx EHT-MCS Map Capability Indicator
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Solution Overview
Problem
Current wireless communication systems face challenges in managing data transmission resources effectively in multi-user MIMO (MU-MIMO) configurations, particularly due to limitations in transmitter capabilities and precoding algorithms, which affect the maximum supportable Modulation and Coding Schemes (MCS) and spatial streams in MU-MIMO communications.
Innovation Solution
The introduction of new subfields in management frames such as Beacon Frames and Association Response Frames, called 'MU-MIMO Tx EHT-MCS Map', allows for the communication of transmitter capabilities between access points (APs) and stations (STAs), enabling the optimization of communication channels and improving precoder performance by indicating supported MCS and spatial streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If receiver capabilities are communicated during sounding procedure, then RX capability information is available, but TX capability information is not provided
Solution Approach 1:
Instead of only indicating receiver capabilities as in prior art, this patent inverts the approach by having the receiver indicate transmitter capabilities. The station receives a capability indicator from the access point that specifies the maximum MCS and spatial streams the AP transmitter can support in MU-MIMO communications, enabling the receiver to make informed transmission decisions.
Solution Approach 2:
The capability indicator is communicated in advance during the sounding procedure or association process, before actual data transmission begins. This preliminary indication of transmitter capabilities allows the receiver to prepare appropriate transmission parameters and optimize MU-MIMO performance from the outset.
2Reliability
If maximum supportable MCS for MU-MIMO is determined by RX capability, then receiver limitations are considered, but transmitter capabilities such as precoding algorithm are not accounted for
Solution Approach 1:
The system implements feedback by having the receiver communicate back to the transmitter its assessment of the transmitter's capabilities. The station sends a capability indicator that reflects what it has determined about the AP's transmitter capabilities, creating a feedback loop that improves the accuracy of capability assessment.
3Productivity
If transmitter capabilities are not communicated, then channel optimization is limited, but additional capability indication mechanisms increase frame complexity
Solution Approach 1:
The capability indicator is merged with existing management frames such as beacon frames, association response frames, or sounding frames. By combining the capability indication function with already-transmitted frames, the patent avoids creating separate overhead frames and minimizes additional complexity while enabling channel optimization.
Data Source
AI summary
A method of communication between a first node and a second node operating in a communications network. The method includes sending, by the first node, to the second node, a first transmission to configure a communication channel between the first node and the second node. The first transmission includes a first frame including a first capability indicator. The first capability indicator indicates a first MU-MIMO capability of a transmitter of the first node. The first multi-user (MU)-MIMO capability includes a first Modulation and Coding Scheme (MCS) processable by the first node or a first number of spatial streams (NSS) processable by the first node.