A-PPDU Aggregation Across HE and EHT PPDUs for Multi-STA Throughput
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Solution Overview
Problem
Existing wireless communication systems face challenges in aggregating different formats of physical layer protocol data units (PPDUs) to achieve extremely high throughput (EHT) and ensure high reliability, particularly in environments with densely deployed access points and overlapping coverage areas.
Innovation Solution
The proposed solution involves configuring an aggregated physical layer protocol data unit (A-PPDU) with PPDUs having equal symbol durations and guard intervals, enabling efficient downlink and uplink transmissions between access points and stations, and supporting multiple STA generations through bandwidth allocation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different formats of PPDUs are aggregated in A-PPDU to achieve extremely high throughput, then throughput performance is improved, but the complexity of generating and managing A-PPDU increases due to unclear formats and bandwidth allocation rules
Solution Approach 1:
The A-PPDU is segmented into multiple PPDU components, each with clearly defined formats and roles. The patent specifies that an A-PPDU comprises a first PPDU (HE PPDU) and a second PPDU (EHT PPDU), where each component has standardized structure and function, enabling systematic generation and management while achieving high throughput through aggregation of these segmented units
Solution Approach 2:
The patent establishes clear parameter specifications for A-PPDU generation, including bandwidth allocation rules (320 MHz total bandwidth with specific allocations to HE and EHT STAs), symbol duration requirements (equal durations for first and second PPDUs), and guard interval configurations. These standardized parameter changes enable automated A-PPDU generation while maintaining high throughput performance
2Productivity
If bandwidth is increased to support more users and higher throughput, then system capacity is improved, but the difficulty of detecting and measuring compatible PPDU formats increases
Solution Approach 1:
The patent ensures equipotential detection by requiring that the first PPDU and second PPDU have equal symbol durations and compatible guard intervals. This equipotential design allows both HE and EHT STAs to detect and measure the PPDUs using standardized procedures, eliminating detection difficulty while supporting increased system capacity through broader bandwidth operation
Solution Approach 2:
The A-PPDU structure is designed with universal compatibility, where the first PPDU (HE format) and second PPDU (EHT format) both adhere to common detection and measurement standards. The standardized fields and equal symbol durations enable universal detection mechanisms to work across different PPDU formats, facilitating system capacity expansion without increasing measurement difficulty
3Adaptability or versatility
If multiple STA generations coexist in the same BSS to maximize throughput, then system versatility is improved, but the complexity of managing different PPDU formats increases
Solution Approach 1:
The patent segments the PPDU formats into distinct first PPDUs (HE format for legacy STAs) and second PPDUs (EHT format for advanced STAs), with each segment having clearly defined characteristics. This segmentation allows APs to manage different STA generations systematically by assigning appropriate PPDU formats to different user groups while maintaining overall system versatility
Solution Approach 2:
The patent applies local quality by allowing different PPDU formats to be used in different parts of the A-PPDU structure - the first PPDU portion serves HE STAs with its specific format requirements, while the second PPDU portion serves EHT STAs with its enhanced format. This localized format differentiation enables multiple STA generations to coexist without increasing overall management complexity
Data Source
AI summary
An access point (AP), a station (STA), and an information transmission method are provided. The information transmission method includes configuring, by an access point (AP), an aggregated physical layer (PHY) protocol data unit (A-PPDU) used for downlink transmission to a set of STAs, wherein the A-PPDU comprises a first PPDU and at least one second PPDU if a number of first symbols of the first PPDU is equal to a number of second symbols of the second PPDU and/or a first field of the first PPDU has a same symbol duration and/or a same guard interval (GI) duration as a second field of the second PPDU; and determining, by the AP, an uplink transmission from a STA of the set of STAs, wherein the uplink transmission is in response to the A-PPDU used for downlink transmission. This can aggregate different formats of PPDUs.