PPDU Reception via RU Aggregation with Preamble Puncturing
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Solution Overview
Problem
Current WLAN systems face challenges in efficiently transmitting and receiving Physical Protocol Data Units (PPDUs) across multiple Resource Units (RUs) with preamble puncturing, especially in next-generation wireless LAN systems like IEEE 802.11be.
Innovation Solution
The proposed solution involves a method and apparatus for receiving a PPDU through a broadband in a WLAN system, utilizing a 240 MHz/320 MHz tone plan and performing RU aggregation during single-user PPDU transmission, considering preamble puncturing in units of 20 MHz/80 MHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preamble puncturing is applied in units of 20 MHz/80 MHz across multiple RUs, then transmission reliability is improved by avoiding interference in specific sub bands, but device complexity increases due to the need to manage and coordinate puncturing patterns across aggregated RUs
Solution Approach 1:
The broadband is divided into multiple 80 MHz bands, each containing multiple 20 MHz channels. Preamble puncturing is applied selectively to specific 20 MHz channels within each 80 MHz band. This segmentation allows independent control of puncturing patterns in different frequency segments, improving reliability by avoiding interference in affected sub bands while managing complexity through localized rather than global puncturing coordination.
2Productivity
If RU aggregation is performed to increase bandwidth utilization, then productivity is improved by transmitting data over broader frequency spectrum, but device complexity increases due to the need to coordinate multiple RUs with different puncturing patterns
Solution Approach 1:
The aggregated RUs are organized into separate 80 MHz bands, with each band potentially having different puncturing patterns. This segmentation allows the system to utilize broad frequency spectrum for high throughput while managing complexity by treating each 80 MHz band as a manageable unit with its own puncturing configuration, rather than coordinating all RUs as a single complex entity.
Solution Approach 2:
Different puncturing patterns can be applied to different 80 MHz bands based on local interference conditions. Each band can be optimized independently with appropriate puncturing patterns, allowing the system to achieve high overall throughput by utilizing clean frequency regions while avoiding localized interference through selective puncturing in affected bands.
3Reliability
If selective puncturing is applied to specific 20 MHz channels within 80 MHz bands, then transmission reliability is improved by avoiding interfered sub bands, but manufacturing precision requirements increase for accurately identifying and applying puncturing patterns
Solution Approach 1:
The frequency spectrum is segmented into standardized 80 MHz bands, each containing four 20 MHz channels. Puncturing patterns are defined at the 80 MHz band level rather than individually for each 20 MHz channel. This segmentation simplifies the configuration process by providing a hierarchical structure where higher-level band patterns automatically determine lower-level channel puncturing, reducing the precision requirements for individual channel configuration while maintaining reliable interference avoidance.
Data Source
AI summary
Proposed are a method and device for receiving a PPDU in a wireless LAN system. Specifically, a reception STA receives a PPDU through a wide band from a transmission STA, and decodes the PPDU. The wide band is a 320/160+160 MHz band configured from a first band and a second band. When the first band is an 80 MHz band in which puncturing is performed in units of 20 MHz, the first band includes a first RU which is an aggregate of a 484RU and a 242RU. The second band is a 240 MHz band excluding the first band in the wide band, and includes a second RU which is an aggregate of three 996 RUs. The PPDU includes a control field and a data field. The data field is received via a first multi-RU which is an aggregate of the first and second RUs.