Triggered TXOP Sharing for Multi-STA Timing Allocation in WLAN
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Solution Overview
Problem
Existing wireless LAN systems face challenges in efficiently managing transmission opportunities (TXOP) for multiple peer-to-peer (P2P) communications, particularly in supporting enhanced features like Extremely High Throughput (EHT) and ultra-high reliability (UHR), which are not adequately addressed by current IEEE 802.11 standards.
Innovation Solution
A method and device for transmitting and receiving in an enhanced triggered transmission opportunity (TXOP) sharing procedure, involving a trigger frame with common and user info fields for multiple stations (STAs), allowing for the allocation of time durations based on the order of user info fields, and enabling multiple P2P communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple peer-to-peer communications are supported in triggered TXOP sharing procedure, then communication versatility is improved, but device complexity increases due to multiple user info fields and timing coordination requirements
Solution Approach 1:
The trigger frame is segmented into a common info field and multiple user info fields, where each user info field corresponds to a specific STA. This segmentation allows the AP to independently configure and allocate resources for multiple P2P communications within a single trigger frame, thereby supporting versatile multi-user scenarios while maintaining structured and manageable frame organization.
Solution Approach 2:
The trigger frame structure is designed with multi-functionality to support both traditional triggered TXOP sharing and enhanced multi-P2P communication scenarios. The common info field provides universal parameters applicable to all STAs, while the plurality of user info fields enables customized resource allocation for different P2P pairs, making the mechanism universally applicable to various communication patterns.
2Productivity
If time duration allocation is based on order of user info fields, then transmission efficiency is improved, but measurement precision deteriorates due to difficulty in accurately determining allocation timing
Solution Approach 1:
The AP performs preliminary action by pre-defining and signaling the order of user info fields in the trigger frame before the actual TXOP allocation. Each user info field contains explicit timing information indicating when the corresponding STA should transmit. This preliminary configuration allows STAs to accurately determine their transmission timing without complex real-time calculations, thereby maintaining both high transmission efficiency and precise timing allocation.
Solution Approach 2:
The system incorporates feedback mechanisms where STAs acknowledge receipt of the trigger frame and confirm their allocated timing. The AP monitors whether STAs transmit at the correct time based on their user info field order, and can adjust subsequent trigger frames to refine timing accuracy. This feedback loop ensures that timing precision is maintained and improved over multiple TXOP sharing cycles.
Data Source
AI summary
Disclosed are a method and device for transmission or reception in an enhanced triggered transmission opportunity sharing procedure in a wireless LAN system. The method performed by a station (STA) in a wireless LAN system according to an embodiment disclosed herein comprises the steps of: receiving, from an access point (AP), a trigger frame related to the sharing of a transmission opportunity (TXOP); and transmitting, to the AP, a response frame to the trigger frame. The trigger frame includes a common information field and a plurality of user information fields for a plurality of STAs including the STA, and the starting point of a time period allocated to the STA in the TXOP can be identified on the basis of the order of the user information field for the STA among the plurality of user information fields.