Per-Stream MCS Allocation in Wireless PDU Transmission
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Solution Overview
Problem
Existing PDU transmission structures in wireless communication systems inefficiently manage modulation and coding schemes (MCS) across multiple spatial streams, leading to inefficiencies in transmission rate and efficiency due to uniform application of MCS based on the lowest quality channel, and lack real-time verification of packet error rates (PER) when different MCSs are applied.
Innovation Solution
An electronic device independently allocates multiple medium access control (MAC) protocol data units (MPDUs) to spatial streams and applies different MCSs to each stream based on their individual channel quality, enabling real-time MCS determination and verification of PER for each stream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform MCS is applied to all spatial streams based on the lowest quality channel, then transmission reliability is maintained, but transmission efficiency deteriorates
Solution Approach 1:
The patent applies different MCS values to different spatial streams based on their individual channel qualities. Specifically, it determines a first MCS for a first spatial stream and a second MCS for a second spatial stream, where the MCS values differ according to the respective channel conditions of each stream, rather than uniformly applying the same MCS to all streams.
Solution Approach 2:
The patent segments the transmission by independently managing MCS for each spatial stream. It divides the single uniform MCS approach into multiple differentiated MCS values, allowing each spatial stream to be optimized independently based on its channel quality, thereby resolving the contradiction between reliability and efficiency.
2Productivity
If different MCSs are applied to multiple spatial streams, then transmission efficiency is improved, but real-time verification of packet error rates deteriorates
Solution Approach 1:
The patent incorporates feedback mechanisms to verify transmission accuracy for each spatial stream. It determines transmission accuracy for each spatial stream based on feedback information, and uses this feedback to dynamically adjust MCS values, thereby enabling real-time verification even when different MCSs are applied to different streams.
Solution Approach 2:
The system performs self-verification by using feedback from each spatial stream to automatically determine transmission accuracy and adjust MCS values without external intervention. This self-service approach handles the verification complexity internally, maintaining transmission efficiency while ensuring accuracy.
3Productivity
If MCS is optimized for each spatial stream, then transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements local quality optimization by determining MCS values specific to each spatial stream's channel conditions. It evaluates the channel quality of each stream independently and assigns appropriate MCS values, thereby optimizing transmission efficiency without requiring complex centralized control for the entire system.
Solution Approach 2:
The patent employs dynamic MCS adjustment based on real-time channel conditions. It continuously monitors channel quality for each spatial stream and adapts MCS values accordingly, allowing the system to maintain optimal performance while managing complexity through adaptive rather than static configuration.
Data Source
AI summary
An electronic device includes: a wireless communication module, comprising communication circuitry, at least one processor, comprising processing circuitry, memory storing instructions, wherein at least one processor, individually or collectively, is configured to execute the instructions and to cause the electronic device to: independently allocate, to a plurality of spatial streams, a plurality of medium access control (MAC) protocol data units (MPDUs) included in a physical layer convergence procedure (PLCP) PDU (PPDU); and transmit the PPDU to an external electronic device through the wireless communication module by applying different modulation and coding schemes (MCSs) to the plurality of spatial streams.