Trigger Frame Format Indication for Flexible TB PPDU Transmission
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Solution Overview
Problem
Current wireless local area network (WLAN) systems face challenges in efficiently transmitting and receiving trigger-based (TB) physical layer protocol data units (PPDUs), particularly in supporting TB A-PPDUs through trigger frames to enhance transmission flexibility and accommodate diverse traffic types.
Innovation Solution
The method involves an access point (AP) transmitting a trigger frame that includes information on supporting different types of TB PPDUs and allocating specific bandwidth for their transmission. Stations (STAs) then use this information to transmit TB PPDUs of varying formats within allocated bandwidths, allowing for flexible uplink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single format of TB PPDU is supported, then the system structure is simple, but the transmission flexibility is limited
Solution Approach 1:
The patent implements dynamic format indication in the trigger frame, where the AP can dynamically specify which TB PPDU format (HE or EHT) each STA should transmit. This allows the system to adapt transmission formats in real-time based on traffic requirements while maintaining a unified basic structure, thus improving flexibility without proportionally increasing complexity.
Solution Approach 2:
The patent changes the format parameter through the trigger frame's format indication field. By modifying this parameter dynamically, the system can switch between different TB PPDU formats (HE vs EHT) without changing the fundamental system architecture, enabling flexible adaptation while controlling complexity through parameter management rather than structural changes.
2Adaptability or versatility
If multiple types of TB PPDUs are supported, then diverse traffic types can be handled, but the bandwidth allocation becomes complex
Solution Approach 1:
The patent applies local quality by allocating different bandwidths to different STAs based on their specific traffic requirements and format types. Each STA receives customized bandwidth allocation in the trigger frame corresponding to its assigned format (HE or EHT), allowing diverse traffic handling while managing complexity through localized, targeted allocations rather than complex global allocation schemes.
3Adaptability or versatility
If TB A-PPDU transmission is enabled, then uplink transmission flexibility is increased, but the coordination overhead increases
Solution Approach 1:
The patent merges the format indication information with the existing trigger frame structure. By combining the format specification with bandwidth allocation and other coordination information in a single trigger frame, the system enables TB A-PPDU transmission flexibility without requiring separate coordination messages, thus reducing overall coordination overhead while maintaining uplink flexibility.
Data Source
AI summary
Disclosed are a method and device for a TB PPDU transmission and reception operation in a wireless LAN system. A method by which a first STA transmits a PPDU in a wireless LAN system according to an embodiment disclosed herein may comprise the steps of: receiving a trigger frame from an access point (AP), wherein the trigger frame includes first information related to supporting the transmission of a first type of TB PPDU and a second type of TB PPDU, and second information related to the bandwidth for TB PPDU transmission; and transmitting the first type of TB PPDU to the AP within a first bandwidth in the overall bandwidth identified by a first type of the first STA through the second information.