Trigger Frame Configuration for A-PPDU in WLAN
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Solution Overview
Problem
Current WLAN systems, such as IEEE 802.11ax, face challenges in maintaining communication stability in dense environments and do not support maximum data throughput required for applications like 4k and 8k video streaming and virtual reality, necessitating a new system like IEEE 802.11be for extremely high throughput and low latency.
Innovation Solution
The method involves determining to operate in A-PPDU transmission, where a trigger frame is transmitted with specific fields indicating the presence of special user information for different variants, allowing for efficient resource allocation and multiplexing of EHT STAs with other amendment compliant devices, enabling operation in wider bandwidths like 320 MHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If A-PPDU transmission with multiple variants is implemented, then data throughput is improved, but device complexity increases
Solution Approach 1:
The trigger frame is segmented into multiple special user information fields, where each field corresponds to a specific variant (e.g., first variant, second variant). This segmentation allows the system to manage multiple variants independently within a single trigger frame, enabling high throughput A-PPDU transmission while organizing the complex structure in a manageable way through clear field delimitation and variant-specific information blocks.
2Adaptability or versatility
If multiple special user information fields are added to trigger frame, then adaptability is improved, but device complexity increases
Solution Approach 1:
The trigger frame structure is designed with universal multi-functionality by incorporating multiple special user information fields that can accommodate different variants (first variant, second variant, etc.). Each field serves a specific variant type, allowing the same trigger frame structure to universally support multiple variant configurations. This approach enables the system to adapt to different transmission requirements while maintaining a unified frame structure, thereby improving adaptability without proportionally increasing complexity.
3Loss of time
If A-PPDU transmission is used for high throughput, then loss of time is reduced, but reliability may worsen in dense environments
Solution Approach 1:
The system employs dynamic variant selection where different variants can be chosen based on transmission conditions and requirements. The trigger frame includes multiple special user information fields that allow dynamic allocation and configuration for different variants, enabling the system to adapt to changing environmental conditions in dense deployments. This dynamic approach optimizes transmission latency by selecting appropriate variants while maintaining reliability through condition-based adaptation.
Data Source
AI summary
A method performed by a transmitter in a wireless local area network (WLAN) includes: determining to operate in A(aggregated)-PPDU transmission, wherein the A-PPDU transmission includes transmission of multiple sub-PPDUs with different variants; and transmitting, to a receiver, a trigger frame including a first field and a second field, wherein the first field indicates whether a first special user information field including first additional common information for a first variant is present; and wherein the second field indicates whether a second special user information field including second additional common information for a second variant is present, and wherein the first special user information field is located before the second special user information field in the trigger frame.