EHT MU PPDU Frame Structure for 320 MHz RU Allocation
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Solution Overview
Problem
Existing IEEE 802.11 standards lack an appropriate frame configuration for communicating information about resource unit (RU) allocation when using a bandwidth of 320 MHz, which is necessary for achieving high throughput in multi-user communication.
Innovation Solution
A communication apparatus and method that generates and transmits an Extremely High Throughput (EHT) Multi-User (MU) Physical Layer Protocol Data Unit (PPDU) with specific fields, including an RU allocation subfield of N×8 bits, to facilitate communication with a bandwidth of 320 MHz, using an appropriate frame configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bandwidth is extended to 320 MHz to achieve high throughput, then the throughput is improved, but the existing frame configuration cannot properly communicate RU allocation information
Solution Approach 1:
The patent segments the signal field into two parts: EHT-SIG-A (common field) and EHT-SIG-B (user-specific field). The RU allocation information is specifically placed in the EHT-SIG-B field with an RU allocation subfield that contains N×8 bits where N=8 for 320 MHz bandwidth. This segmentation allows the frame configuration to properly accommodate and communicate RU allocation information for extended bandwidth operations while maintaining backward compatibility with legacy standards through the common field structure.
2Productivity
If multi-user communication is implemented with multiple partners, then the communication efficiency is improved, but the frame structure becomes more complex
Solution Approach 1:
The patent creates a universal frame structure that serves multiple functions: the L-STF, L-LTF, and L-SIG fields maintain compatibility with legacy IEEE 802.11 standards while the EHT-SIG-A and EHT-SIG-B fields enable new EHT-specific multi-user communication features. The common field structure can accommodate various bandwidth configurations (20 MHz to 320 MHz) and multi-user scenarios through the flexible RU allocation subfield, making the frame structure universally applicable across different communication modes without requiring completely separate frame formats for each scenario.
Data Source
AI summary
A communication apparatus communicates an Extremely High Throughput (EHT) Multi-User (MU) Physical Layer Protocol Data Unit (PPDU) including an Extremely High Throughput-Signal-B (EHT-SIG-B) including a resource unit (RU) allocation subfield including N×8 bits, where N=8 holds in a case where the communication apparatus uses a bandwidth of 320 MHz as a bandwidth.