Trigger-Based PPDU Length Field Adaptation for Multi-Format Wireless Stations

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Solution Overview

Problem

Existing wireless communication methods struggle to efficiently support multiple PPDU formats, leading to difficulties in wireless communication terminals in handling diverse PPDU formats.

Innovation Solution

A wireless communication method where a station receives a triggering frame and determines the value of a length field in a signaling field of a trigger-based PPDU based on the type of the triggering frame and the PPDU format, allowing for efficient transmission of TB PPDUs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single PPDU format is used in existing wireless communication methods, then the system complexity is low and ease of operation is maintained, but the adaptability to support diverse communication requirements and multiple formats is poor

Engineering Contradiction:

Improvesupport for multiple PPDU formatsVSAvoidcomplexity in handling diverse PPDU formats

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent changes the parameter of the length field format based on the PPDU format type. Specifically, when the PPDU format is HE TB PPDU, the length field uses a first format; when it is EHT TB PPDU, the length field uses a second format. This parameter change allows the system to support multiple PPDU formats adaptably while maintaining clear distinction between formats through different length field interpretations, thereby resolving the contradiction between adaptability and device complexity.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If multiple PPDU formats are supported without a unified determination method, then the adaptability is improved, but the difficulty of detecting and measuring the correct format increases

Engineering Contradiction:

Improvecapability to handle diverse PPDU formatsVSAvoiddifficulty in determining length field value

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies preliminary action by determining the PPDU format type before interpreting the length field value. The receiving device first identifies whether the PPDU is HE TB PPDU or EHT TB PPDU format, then based on this preliminary determination, correctly interprets the length field value according to the corresponding format rules. This preliminary format identification action prevents confusion in detecting and measuring the length field, thereby reducing the difficulty while maintaining multi-format support.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250132881A1Wireless communication method supporting plurality of PPDU formats, and wireless communication terminal using same

Publication Date: 2025.04.24 WILUS INSTITUTE OF STANDARDS & TECHNOLOGY INC

AI summary

A station that wirelessly communicates is disclosed. The station comprises a transceiver and a processor. The processor is configured to: receive, using the transceiver, a triggering frame that triggers transmission by the station; on the basis of the type of triggering frame and a type of trigger-based (TB) physical layer protocol data unit (PPDU) transmitted in response to the triggering frame, determine a value of a Length field of a signaling field of the trigger-based PPDU, the Length field indicating a value used to calculate a duration of the TB PPDU; and transmit the TB PPDU.