Trigger Frame Bandwidth Field Configuration for 320 MHz WLAN
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current WLAN systems face challenges in efficiently indicating and supporting the bandwidth of TB A-PPDU in next-generation wireless local area networks, particularly in aggregating HE TB PPDU and EHT TB PPDU through a trigger frame, which affects backward compatibility and spatial reuse in multi-user environments.
Innovation Solution
A method and apparatus are proposed to configure a bandwidth field and indicator bits within the trigger frame to distinguish between 320-1 MHz and 320-2 MHz bands, allowing efficient transmission of HE TB PPDU and EHT TB PPDU, including spatial reuse fields to manage interference and bandwidth allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bandwidth field is used to indicate the bandwidth of TB A-PPDU, then the signaling structure is simple, but it cannot simultaneously support both HE TB PPDU and EHT TB PPDU with different bandwidth configurations
Solution Approach 1:
The bandwidth indication is segmented into two separate bandwidth fields: a first bandwidth field for indicating the bandwidth of HE TB PPDU and a second bandwidth field for indicating the bandwidth of EHT TB PPDU. This segmentation allows each field to independently configure bandwidth for its respective PPDU type, resolving the contradiction between simple signaling structure and versatile bandwidth indication capability.
Solution Approach 2:
The solution adds a dimensional distinction by introducing separate bandwidth fields for different PPDU types (HE and EHT) within the same trigger frame. This dimensional separation in the signaling structure enables independent bandwidth configuration for each PPDU type without increasing overall structural complexity, as each field operates in its own dimension.
2Adaptability or versatility
If separate bandwidth fields are added for HE and EHT TB PPDU, then both PPDU types can be supported, but the trigger frame structure becomes more complex
Solution Approach 1:
The trigger frame is designed with universal multi-functionality by incorporating both a first bandwidth field and a second bandwidth field that can simultaneously support HE TB PPDU and EHT TB PPDU configurations. This universal structure allows the same trigger frame format to handle multiple PPDU types with different bandwidth requirements, achieving versatility without proportionally increasing complexity.
Solution Approach 2:
The solution employs parameter changes by introducing additional bandwidth fields with specific values that indicate different PPDU types and their corresponding bandwidth configurations. The bandwidth fields contain encoded information that changes parameters based on the PPDU type, allowing the system to support multiple PPDU types while maintaining a structured and manageable frame format.
3Productivity
If the bandwidth field is configured to support 320 MHz band, then high throughput is achieved, but backward compatibility with HE STA is compromised
Solution Approach 1:
The trigger frame implements local quality by providing different bandwidth field configurations for different receiving stations. HE STA can utilize the first bandwidth field configured for 80 MHz operation, while EHT STA can utilize the second bandwidth field configured for 320 MHz operation. This local differentiation ensures that each STA type receives appropriate bandwidth configuration, achieving high throughput for capable devices while maintaining backward compatibility with legacy devices.
Solution Approach 2:
The solution introduces dynamics by making the bandwidth configuration adaptive based on the receiving STA type. The bandwidth fields are dynamically interpreted by different STA types: HE STA interprets the first bandwidth field for 80 MHz operation, while EHT STA interprets the second bandwidth field for 320 MHz operation. This dynamic interpretation allows the system to achieve high throughput when EHT STA is present while maintaining backward compatibility with HE STA.
4Productivity
If spatial reuse fields are added to manage interference in multi-user environments, then network efficiency is improved, but the signaling overhead increases
Solution Approach 1:
The solution merges spatial reuse functionality into the existing trigger frame structure by integrating spatial reuse fields with the bandwidth indication fields. The spatial reuse fields are combined with the first and second bandwidth fields to provide both bandwidth configuration and spatial reuse management in a unified structure, improving network efficiency in multi-user environments while minimizing additional signaling overhead through consolidation.
Data Source
AI summary
The present disclosure proposes a method and a device for configuring a bandwidth field and an indicator bit to indicate a bandwidth of a TB A-PPDU in a wireless LAN system. Specifically, a reception STA receives a trigger frame from a transmission STA. The reception STA transmits a TB A-PPDU to the transmission STA via a 320 MHz band. The trigger frame includes a common information field, a special user information field, and a first and a second bit. The common information field includes a first bandwidth field. The special user information field includes a second bandwidth field. The TB A-PPDU includes an HE TB PPDU for a primary 160 MHz channel and an EHT TB PPDU for a secondary 160 MHz channel.