Enhanced Trigger Frame Segmentation for 802.11be Throughput
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Solution Overview
Problem
Existing IEEE 802.11 wireless communication protocols lack support for enhanced features such as increased bandwidth and spatial streams, necessitating new trigger frame formats to facilitate efficient uplink communications.
Innovation Solution
The implementation of enhanced trigger frames that include a MAC header, a common information field, and a special user information field with subfields for configuring non-legacy PPDU transmissions, supporting bandwidths up to 320 MHz and 16 spatial streams, while being backwards compatible with legacy STAs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing IEEE 802.11 trigger frame formats are used, then legacy compatibility is maintained, but support for enhanced features (bandwidth >160 MHz, 16 spatial streams) is insufficient
Solution Approach 1:
The trigger frame is segmented into distinct fields: a common information field containing UL BW and spatial stream parameters, and multiple user information fields (including special user information fields) containing individual STA configurations. This segmentation allows legacy STAs to process only the common field while non-legacy STAs can access extended user information for enhanced features.
Solution Approach 2:
The trigger frame format is designed to serve multiple functions simultaneously: it maintains backward compatibility with legacy STAs through the common information field structure, while also supporting enhanced features (bandwidth >160 MHz, 16 spatial streams) through special user information fields. The same frame structure universally serves both legacy and non-legacy STAs.
2Productivity
If new trigger frame formats supporting enhanced features are implemented, then bandwidth and spatial stream capacity increase, but compatibility with legacy STAs deteriorates
Solution Approach 1:
Different parts of the trigger frame have different quality characteristics: the common information field maintains legacy-compatible formatting for broad compatibility, while special user information fields contain enhanced parameters (UL BW extension subfield, spatial stream parameters) for high-performance STAs. Each STA processes only the portion relevant to its capability level.
Solution Approach 2:
The trigger frame dynamically adapts to the capabilities of receiving STAs through the presence of special user information fields. Non-legacy STAs can identify and process these extended fields when present, while legacy STAs automatically ignore them and process only the common information field, enabling dynamic compatibility adjustment.
3Loss of information
If special user information fields are added to trigger frames, then configuration information for non-legacy PPDUs is complete, but frame structure complexity increases
Solution Approach 1:
The special user information fields are nested within the existing trigger frame structure as extensions of the user information list. Each special user information field contains nested subfields (UL BW extension, spatial stream parameters) that provide detailed configuration information without creating a completely new frame structure, reducing overall complexity.
Data Source
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AI summary
This disclosure provides methods, devices and systems for generating enhanced trigger frames. Some implementations more specifically relate to trigger frame designs that support gains in data throughput achievable in accordance with the IEEE 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an enhanced trigger frame may be used to solicit a non-legacy trigger-based (TB) physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) from one or more wireless stations (STAs). In some implementations, the enhanced trigger frame may be configurable to support multiple versions of the IEEE 802.11 standard. For example, an enhanced trigger frame may be configured in accordance with a legacy trigger frame format or a non-legacy trigger frame format. Thus, when configured in accordance with the legacy trigger frame format, the enhanced trigger frame can also be used to a legacy TB PPDU from one or more STAs.