RU Indication Across PPDU Subblocks for Low-Overhead 320 MHz Wi‑Fi
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Solution Overview
Problem
Existing resource unit indication methods in 802.11ax result in significant overheads when supporting OFDMA or MU-MIMO transmission in larger bandwidths, such as 320 MHz, leading to inefficiencies in data transmission.
Innovation Solution
The method involves dividing the transmission bandwidth into subblocks and using a one-to-one correspondence between these subblocks and first fields within the PPDU to indicate resource units allocated to stations, allowing for combinations of subblocks or segments to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource unit indication methods are used in 802.11ax for larger bandwidths, then data transmission capacity is improved, but overhead increases significantly
Solution Approach 1:
The patent divides the bandwidth into multiple subblocks and divides the resource unit indication information into multiple parts, with each part corresponding to a specific subblock. This segmentation allows the indication information to be distributed across different subblocks rather than transmitted as a single large block, reducing the overhead in any single location while maintaining the ability to indicate resource units across the entire large bandwidth.
2Measurement precision
If resource unit indication information is transmitted for each 20 MHz segment, then resource allocation precision is improved, but overhead increases
Solution Approach 1:
The patent merges the resource unit indication information from multiple 20 MHz segments into a unified indication structure. Instead of transmitting separate indication information for each 20 MHz segment (which would multiply the overhead), the patent creates a consolidated indication that covers multiple segments while maintaining the precision needed for resource allocation in each segment.
3Adaptability or versatility
If the bandwidth is divided into more subblocks, then resource allocation flexibility is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by having each subblock's resource unit indication information tailored to that specific subblock's requirements. Each part of the divided indication information is optimized for its corresponding subblock, allowing flexible resource allocation within each local region while keeping the overall system manageable through this modular, localized approach.
Data Source
AI summary
A resource unit indication method and apparatus, and a storage medium, where the method includes: an access point (AP) sending a physical protocol data unit (PPDU) to a plurality of stations (STAs), where a transmission bandwidth of the PPDU is divided into M subblocks, M is an integer greater than 1, the transmission bandwidth is greater than or equal to 80 megahertz (MHz), the PPDU includes M first fields, the M first fields are in a one-to-one correspondence with the M subblocks, the first field is transmitted on a corresponding subblock, and the first field is used to indicate a resource unit (RU) allocated by the AP to at least one of the plurality of STAs.