STA Trigger Frame TXOP Sharing NAV Timeout
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Solution Overview
Problem
Current wireless LAN systems face challenges in efficiently managing transmission opportunities (TXOP) for non-Access Point (AP) Stations (STA) to share and set network allocation vectors (NAV) within a multi-link operation, limiting their ability to transmit and receive data effectively.
Innovation Solution
A method and device where a STA receives a trigger frame from an AP to share a TXOP, allowing the STA to transmit Physical Layer Protocol Data Units (PPDU) with duration information set based on the shared TXOP, regardless of the NAV set by the AP or another STA, even after a NAV timeout, enabling efficient data transmission and reception within a shared TXOP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-AP STA shares TXOP and transmits data regardless of NAV timeout, then data transmission efficiency is improved, but network coordination and collision avoidance may deteriorate
Solution Approach 1:
The non-AP STA performs preliminary actions by receiving and storing the trigger frame and NAV information before the NAV timeout occurs. The STA prepares the duration information and transmission parameters in advance, so that when the NAV timeout occurs, the STA can immediately transmit data without waiting for recoordination, thus improving transmission efficiency while maintaining network coordination through pre-established rules
Solution Approach 2:
The trigger frame acts as an intermediary mechanism that carries NAV information and transmission permissions from the AP to non-AP STAs. This intermediary structure allows the STA to operate autonomously after receiving the trigger frame, improving efficiency, while the AP maintains overall network coordination through the initial trigger frame distribution
2Productivity
If non-AP STA sets duration information based on shared TXOP, then transmission opportunity utilization is improved, but complexity of NAV management increases
Solution Approach 1:
The non-AP STA applies local quality by setting duration information specifically for its own transmission within the shared TXOP, rather than managing the entire TXOP. The STA only needs to calculate and set duration based on its specific data transmission requirements, which simplifies NAV management compared to managing the complete TXOP while still improving transmission opportunity utilization
Solution Approach 2:
The TXOP management is segmented into AP-controlled portions and STA-autonomous portions. The AP sets the overall TXOP framework through the trigger frame, while individual STAs segment and manage their own duration information within that framework. This segmentation reduces the complexity burden on individual STAs while improving overall transmission utilization
Data Source
AI summary
Disclosed is a method by which a station (STA) transmits a frame in a wireless communication system. The STA according to the present invention receives, from an access point (AP), a trigger frame indicating uplink transmission, and transmits a physical layer protocol data unit (PPDU) to the AP and/or another STA within a shared transmission opportunity (TXOP), on the basis of the trigger frame. Here, the trigger frame is used to share, with the STA, a part or all of the TXOP obtained by the AP. Also, the PPDU includes duration information indicating the TXOP for transmission of the PPDU, and the duration information is configured on the basis of the shared TXOP.