Uplink Transmit Configuration via Interference-Based MCS Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies face challenges in efficiently configuring uplink transmissions in trigger-based multi-user uplink transmissions, particularly in minimizing multi-user interference and optimizing Modulation and Coding Scheme (MCS) settings for reliable and high-throughput communications.
Innovation Solution
The proposed solution involves an Access Point (AP) dynamically adjusting transmit parameters, such as Modulation and Coding Scheme (MCS), Number of Spatial Streams (Nss), and Resource Unit (RU) allocation, based on expected interference values and target Packet Error Rate (PER) performances, to optimize uplink transmissions in trigger-based multi-user scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the AP uses fixed MCS settings for uplink transmissions, then device complexity is reduced, but throughput performance and reliability cannot be optimized for varying interference conditions
Solution Approach 1:
The patent implements dynamic MCS selection where the AP determines expected interference values and selects appropriate MCS indices from a table based on these interference conditions. This allows the system to adapt transmission parameters in real-time according to channel conditions, resolving the contradiction between fixed simplicity and dynamic performance optimization
Solution Approach 2:
The system changes the MCS parameter dynamically based on expected interference values. The AP calculates interference metrics and maps these to specific MCS indices, enabling throughput optimization without requiring complex device-side decision-making, thus balancing performance with manageable complexity
2Productivity
If the AP configures aggressive MCS settings to maximize throughput, then productivity increases, but reliability deteriorates due to higher Packet Error Rates in high-interference conditions
Solution Approach 1:
The patent implements a feedback mechanism where the AP determines expected interference values based on channel conditions and uses these to select appropriate MCS settings. This closed-loop approach ensures that throughput is maximized only when channel conditions permit, automatically reducing MCS aggressiveness when interference increases, thus maintaining both productivity and reliability
Solution Approach 2:
The system performs preliminary interference assessment before selecting MCS settings. By calculating expected interference values in advance and mapping them to appropriate MCS indices, the system proactively configures reliable transmission parameters before data transmission begins, preventing error occurrences rather than correcting them later
3Reliability
If the AP uses conservative MCS settings to ensure reliability, then Packet Error Rate decreases, but throughput performance is reduced
Solution Approach 1:
The patent employs dynamic MCS adjustment where conservative settings are used only when interference conditions warrant them. The AP continuously assesses channel conditions and transitions between conservative and aggressive MCS settings as needed, ensuring reliability is maintained only when necessary while maximizing throughput when conditions allow
4Productivity
If the AP dynamically adjusts transmit parameters based on expected interference, then throughput performance and reliability are optimized, but device complexity increases due to additional configuration requirements
Solution Approach 1:
The patent implements self-service at the AP side where the access point autonomously determines expected interference values and selects appropriate MCS settings without requiring complex coordination with connected devices. This centralizes the complexity management at the AP which has better channel state information, while keeping device-side operations simple
Solution Approach 2:
The system performs preliminary determination of expected interference values and MCS selection before uplink transmission begins. By pre-configuring appropriate MCS settings based on current channel conditions, the system avoids complex real-time adjustments during transmission, simplifying the overall configuration process while maintaining optimization benefits
Data Source
AI summary
For example, a wireless communication device may be configured to determine an expected interference-based value corresponding to an Uplink (UL) transmission from a wireless communication station (STA) in a Trigger-Based (TB) Multi-User (MU) UL transmission to be communicated from a plurality of STAs to the wireless communication device; to determine one or more transmit (Tx) configuration parameters for the STA based on the expected interference-based value corresponding to the UL transmission from the STA; and to transmit a trigger frame to trigger the TB MU UL transmission, the trigger frame including the one or more Tx configuration parameters to configure the UL transmission from the STA.