NFRP Trigger Frame Scheduling for EHT Null Data Packet Feedback
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Solution Overview
Problem
The challenge of scheduling an EHT station to send an EHT TB NDP report is not adequately addressed in the 802.11be standard, given the increased bandwidth requirements compared to the 802.11ax standard.
Innovation Solution
A method and apparatus that utilize NFRP trigger frames to include HE and EHT modulation bandwidth indication information, allowing for the scheduling of EHT stations to send EHT TB NDPs within their respective bandwidths, using user information fields to determine resource allocation and subcarrier set indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the 802.11ax standard is used with HE TB NDP, then the feedback report procedure can be implemented, but the bandwidth is limited to 160 MHz and cannot support EHT stations requiring 320 MHz bandwidth
Solution Approach 1:
The NFRP trigger frame is designed to serve multiple functions: it can schedule both HE stations (for 160 MHz bandwidth) and EHT stations (for 320 MHz bandwidth) using a single unified frame structure. The frame includes both HE modulation bandwidth indication information and EHT modulation bandwidth indication information, allowing it to adapt to different station types and bandwidth requirements without requiring separate trigger frames
Solution Approach 2:
The trigger frame incorporates dynamic bandwidth indication fields that can be configured based on the specific requirements of the stations being scheduled. The HE modulation bandwidth indication information and EHT modulation bandwidth indication information allow the frame to adapt its parameters dynamically, enabling the system to switch between 160 MHz and 320 MHz bandwidth modes as needed
2Adaptability or versatility
If separate trigger frames are designed for HE stations and EHT stations, then bandwidth support is adequate, but the system complexity and overhead increase significantly
Solution Approach 1:
The patent merges the scheduling functions for HE stations and EHT stations into a single NFRP trigger frame. By combining HE modulation bandwidth indication information and EHT modulation bandwidth indication information in one frame, the system reduces the number of trigger frames needed while maintaining support for both station types and their respective bandwidth requirements
Solution Approach 2:
The unified NFRP trigger frame is designed to handle multiple station types and bandwidth configurations simultaneously, improving feedback report efficiency by reducing overhead and enabling the AP to collect resource request feedback from both HE and EHT stations in a single scheduling operation
3Adaptability or versatility
If the NFRP trigger frame includes both HE and EHT modulation bandwidth indication information, then both HE and EHT stations can be scheduled efficiently, but the frame size and processing complexity increase
Solution Approach 1:
The NFRP trigger frame is segmented into distinct fields: HE modulation bandwidth indication information and EHT modulation bandwidth indication information. This segmentation allows each station type to extract only the relevant information it needs, reducing processing complexity while maintaining comprehensive scheduling capability for both HE and EHT stations
Data Source
AI summary
A trigger based null data packet transmission method and a related apparatus are provided, which relate to wireless communication, and are applied to a wireless local area network supporting an 802.11be standard. The method includes: receiving, by an EHT station, an NFRP trigger frame; determining whether a resource for scheduling the EHT station is in an EHT modulation bandwidth or an HE modulation bandwidth based on information in the NFRP trigger frame; and sending an EHT TB NDP if the resource is in the EHT modulation bandwidth; or sending an HE TB NDP if the resource is in the HE modulation bandwidth, where the NFRP trigger frame includes a first user information field, and is used to schedule the EHT station to send the HE TB NDP in the HE modulation bandwidth and send the EHT TB NDP in the EHT modulation bandwidth.