Multi-PSDU PPDU Transmission for Low-Latency Wireless LAN
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Solution Overview
Problem
Existing wireless LAN technologies face challenges in improving throughput, reducing latency, and enhancing reliability for high-efficiency and low-latency applications, particularly in supporting multiple spatial streams and ultra-high reliability.
Innovation Solution
The method involves generating and transmitting a PPDU that includes multiple PSDUs, utilizing multi-layer transmission to enhance throughput and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional single-PSDU transmission is used, then device complexity is low, but throughput is limited
Solution Approach 1:
The patent segments the transmission by incorporating multiple PSDUs (Physical Service Data Units) within a single PPDU (Physical Protocol Data Unit) structure. This allows multiple data streams to be transmitted simultaneously over the wireless medium, thereby increasing throughput without requiring multiple separate transmission protocols or devices. The segmentation enables efficient utilization of available bandwidth by parallelizing data transmission.
Solution Approach 2:
The patent introduces multi-layer transmission across multiple spatial streams (dimensions), allowing data to be transmitted simultaneously through multiple spatial paths. This dimensional expansion from single-stream to multi-stream transmission increases throughput capacity while maintaining manageable device complexity through structured signal processing.
2Loss of time
If traditional transmission methods are used, then latency is higher, but system reliability is maintained
Solution Approach 1:
The patent enables continuous transmission of multiple PSDUs within a single PPDU frame, eliminating gaps between individual data unit transmissions. This continuous multi-PSDU transmission reduces overall latency by utilizing the entire available transmission time effectively, while maintaining reliability through the structured PPDU encapsulation that ensures complete data delivery.
Solution Approach 2:
The patent prepares multiple PSDUs for simultaneous transmission by organizing them in advance within the PPDU structure before transmission begins. This preliminary organization allows the transmitter to send multiple data units in one coordinated action rather than sequentially, reducing latency while maintaining system reliability through pre-validated data structures.
3Productivity
If multi-layer transmission with multiple PSDUs is implemented, then throughput is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal PPDU structure that can encapsulate multiple PSDUs of different types and sizes while maintaining a consistent transmission framework. This multi-functional PPDU design allows the system to handle various data transmission scenarios through a single unified protocol, increasing throughput without proportionally increasing device complexity.
Solution Approach 2:
The patent implements a nested structure where multiple PSDUs are contained within a single PPDU envelope. This nesting approach allows complex multi-PSDU transmissions to be managed through a simplified outer PPDU structure, effectively hiding the complexity of multiple data units within a single manageable transmission unit, thereby increasing throughput while controlling device complexity.
4Loss of time
If multiple PSDUs are transmitted in a single PPDU, then latency is reduced, but processing complexity increases
Solution Approach 1:
The patent segments the received PPDU into multiple individual PSDUs at the receiver, allowing parallel processing of multiple data units. This segmentation enables the receiver to extract and process multiple PSDUs simultaneously from a single PPDU transmission, reducing overall processing latency while managing complexity through systematic decomposition of the incoming data stream.
Data Source
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AI summary
A method and device for PPDU transmission/reception in a wireless LAN system are disclosed. The method performed by means of a first STA, according to the present disclosure, may comprise the steps of: generating PPDU; and transmitting the PPDU to a second STA.