Extremely High Throughput Signal Field Preamble Puncturing for 320 MHz Bands
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Solution Overview
Problem
Current wireless LAN communication standards, such as IEEE 802.11ax, are limited to using Preamble Puncturing in frequency bandwidths up to 160 MHz, whereas the emerging IEEE 802.11be standard aims to extend this to 320 MHz, necessitating a solution to effectively implement Preamble Puncturing in wider bandwidths.
Innovation Solution
The proposed solution involves a communication apparatus that transmits wireless frames with specific preambles, including Legacy Short Training Field (L-STF), Legacy Long Training Field (L-LTF), and Extremely High Throughput (EHT) fields, which include information about Preamble Puncturing when operating in a 320 MHz frequency bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Preamble Puncturing is applied in IEEE 802.11ax standard, then frequency band utilization is improved for bandwidths up to 160 MHz, but the technique cannot be extended to 320 MHz bandwidth
Solution Approach 1:
The patent modifies the EHT-SIG-A field parameters to include a new Preamble Puncturing indicator that enables 320 MHz bandwidth operation. This parameter change allows the system to extend the puncturing technique from 160 MHz to 320 MHz by updating the signal field structure with additional bits that indicate the applicable bandwidth and puncturing pattern.
Solution Approach 2:
The patent segments the frequency bandwidth into 20 MHz units and defines specific puncturing patterns for different bandwidth configurations. By dividing the 320 MHz bandwidth into manageable segments and defining puncturing patterns for each segment, the system can effectively apply Preamble Puncturing at the wider bandwidth while maintaining compatibility with existing processing mechanisms.
2Productivity
If frequency bandwidth is extended from 160 MHz to 320 MHz, then throughput is improved, but compatibility with existing 802.11ax devices is reduced
Solution Approach 1:
The patent includes a Legacy Signal Field (L-SIG) and EHT-SIG-A field structure that provides preliminary information about the transmission parameters before the actual data transmission begins. This preliminary signaling allows receiving devices to understand the 320 MHz bandwidth configuration and puncturing patterns in advance, enabling them to properly process the transmission even if they support only up to 160 MHz.
Solution Approach 2:
The EHT-SIG-A field acts as an intermediary between the transmitter and receiver, carrying control information that mediates the compatibility issue. This intermediate signaling layer allows the system to announce 320 MHz operation while providing receiving devices with the necessary information to process the transmission appropriately, thus bridging the gap between new and existing standards.
Data Source
AI summary
A communication apparatus capable of performing wireless communication conforming to the IEEE 802.11 standard includes a transmission unit configured to transmit a wireless frame having preambles and data fields of a physical layer (PHY). The preambles include a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an Extremely High Throughput Signal A Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF). The EHT-SIG-A includes information about Preamble Puncturing in a case where a 320 MHz frequency bandwidth is to be used by the communication apparatus.