640 MHz Spatial Reuse Subfields in Trigger-Based PPDU
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current IEEE 802.11 standards are limited to a maximum radio wave bandwidth of 320 MHz, which restricts the appropriate frame structure for communicating information regarding spatial reuse when using wider bandwidths, such as 640 MHz.
Innovation Solution
A communication apparatus is designed to transmit a trigger-based physical layer protocol data unit (PPDU) that includes specific subfields for spatial reuse information, allowing for appropriate communication of spatial reuse data even when using a 640 MHz bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the radio wave bandwidth is extended beyond 320 MHz to improve throughput, then the throughput is improved, but there is no appropriate frame structure that can communicate information regarding spatial reuse
Solution Approach 1:
The 640 MHz bandwidth is divided into two 320 MHz subbands, with separate spatial reuse fields (spatial reuse 1 and spatial reuse 2) allocated to each subband. This segmentation allows the system to handle wider bandwidth while maintaining compatibility with existing frame structures designed for 320 MHz, thereby improving throughput without creating an entirely new complex frame structure.
2Productivity
If the radio wave bandwidth is extended to 640 MHz to improve throughput, then the throughput is improved, but the compatibility with existing IEEE 802.11 standards is reduced
Solution Approach 1:
The frame structure is designed to be universal by incorporating spatial reuse fields that work with both 320 MHz and 640 MHz bandwidths. The existing L-STF, L-LTF, L-SIG, and U-SIG fields maintain their original functions, while adding spatial reuse 1 and spatial reuse 2 fields that can accommodate both bandwidth configurations, ensuring backward compatibility and broad adaptability across IEEE 802.11 standards.
Data Source
AI summary
In a case where a bandwidth of 640 MHz is used, a high reliability trigger-based physical layer protocol data unit (HR TB PPDU) is transmitted that includes a universal signal (U-SIG) including a spatial reuse 1 subfield indicating information regarding spatial reuse in a first 320 MHz subband and a spatial reuse 2 subfield indicating information regarding spatial reuse in a second 320 MHz subband.