A-PPDU Phase Rotation Across Mixed Bandwidth PPDU Aggregation
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Solution Overview
Problem
Existing wireless communication systems face challenges in aggregating different formats of physical layer protocol data units (PPDUs) and applying phase rotation to achieve extremely high throughput (EHT) with improved peak-to-average power ratio (PAPR) and reliability.
Innovation Solution
A method and system for configuring and determining aggregated physical layer protocol data units (A-PPDUs) with phase rotation applied based on associated bandwidths, involving at least one first and one second PPDU, to enhance communication performance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If aggregated physical layer protocol data units (A-PPDUs) are configured to support multiple bandwidths (20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz), then adaptability and versatility are improved, but device complexity increases due to the need to handle multiple PPDU formats and apply phase rotation across different bandwidth configurations
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting phase rotation based on the configured bandwidth of the A-PPDU. Different bandwidth configurations (20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz) trigger different phase rotation patterns, allowing the system to adapt to various bandwidth requirements while maintaining controlled complexity through standardized rotation rules for each bandwidth level
Solution Approach 2:
The patent segments the A-PPDU into multiple PPDUs that can be independently configured for different bandwidths. Each PPDU within the aggregation can be assigned a specific bandwidth (20, 40, 80, 160, or 320 MHz), allowing flexible composition of aggregated units that adapt to channel conditions and service requirements without requiring a complete system redesign for each bandwidth scenario
2Reliability
If phase rotation is applied to A-PPDUs according to configured bandwidth, then peak-to-average power ratio (PAPR) is improved, but manufacturing precision and measurement precision requirements increase for accurate phase rotation implementation
Solution Approach 1:
The patent changes the phase rotation parameter dynamically based on the A-PPDU bandwidth configuration. By linking phase rotation values to the configured bandwidth (20, 40, 80, 160, 320 MHz), the system achieves PAPR improvement through standardized phase adjustments that are easier to implement with controlled precision requirements, rather than requiring arbitrary high-precision phase control
3Productivity
If multiple PPDU formats are aggregated in A-PPDU, then productivity and throughput are improved, but difficulty of detecting and measuring increases due to format heterogeneity
Solution Approach 1:
The patent creates a universal A-PPDU structure that can accommodate multiple PPDU formats (different bandwidths and types) within a single aggregated unit. The standardized A-PPDU framework provides common signaling and structure elements that enable receivers to detect and measure heterogeneous PPDUs using unified procedures, thereby maintaining high throughput while reducing detection complexity compared to handling each format separately
Data Source
AI summary
An access point (AP), a station (STA), and a wireless communication method are provided. The wireless communication method includes configuring, by an access point (AP), an aggregated physical layer (PHY) protocol data unit (A-PPDU) to a set of stations (STAs), wherein the A-PPDU comprises at least one first PPDU and at least one second PPDU, and phase rotation is applied to the A-PPDU according to at least one bandwidth associated with at least one of the A-PPDU, the at least one first PPDU, and the at least one second PPDU. This can solve issues in the prior art, apply phase rotation to an A-PPDU, improve peak-to-average power ratio (PAPR) of the A-PPDU, achieve extremely high throughput (EHT), provide a good communication performance, and/or provide high reliability.