PHY Rate Adaptation for PPDU Transmission Padding Reduction
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies due to excessive MAC padding required to comply with minimal MPDU size requirements, leading to wasted channel resources and reduced throughput.
Innovation Solution
A rate-setting mechanism is implemented to optimize rate-dependent parameters for PPDU transmission, such as reducing the PHY transmission rate or selecting a narrower channel bandwidth, to minimize MAC padding and enhance transmission robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MAC padding is added to meet minimal MPDU size requirements, then transmission robustness is improved, but channel resources are wasted and throughput is reduced
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the PHY transmission rate and channel bandwidth based on the actual MPDU size and channel conditions. When MPDUs are small, the system reduces the transmission rate or narrows the bandwidth to minimize the required padding, thereby maintaining robustness while improving throughput. This resolves the contradiction by adapting parameters to the specific transmission scenario rather than using fixed settings.
2Reliability
If MAC padding is added to meet minimal MPDU size requirements, then transmission robustness is improved, but airtime utilization is reduced
Solution Approach 1:
The patent implements dynamics by making the transmission parameters (rate and bandwidth) adjustable and adaptive rather than fixed. The system dynamically selects optimal parameters based on real-time conditions including MPDU size and channel quality, allowing the system to minimize padding requirements while maintaining robustness. This dynamic adaptation prevents airtime waste that would occur with static, overly conservative padding settings.
3Productivity
If higher transmission rate is used, then productivity is improved, but MAC padding requirements increase
Solution Approach 1:
The patent applies parameter changes by adjusting the transmission rate and bandwidth based on the relationship between MPDU size and padding requirements. When higher rates are used, the system monitors the resulting padding overhead and dynamically reduces the rate or bandwidth if padding becomes excessive. This creates an optimized balance between transmission speed and padding loss, resolving the contradiction through adaptive parameter selection.
Data Source
AI summary
For example, a wireless communication station (STA) may be configured to determine a selected setting of one or more rate-dependent parameters for transmission of a Physical layer (PHY) Protocol Data Unit (PPDU) based on a minimal Medium Access Control (MAC) Protocol Data Unit (MPDU) size requirement such that, for at least one MPDU of the PPDU, a first count of MAC padding bits to pad the MPDU according to the selected setting of the one or more rate-dependent parameters is less than a second count of MAC padding bits to pad the MPDU according to a channel-based setting of the one or more rate-dependent parameters, wherein, the channel-based setting of the one or more rate-dependent parameters is based on a condition of a wireless communication channel for transmission of the PPDU; and to transmit the PPDU according to a transmission data rate based on the selected setting.