EHT-SIG-A HARQ Subfield for Rapid Recognition
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Solution Overview
Problem
Current communication devices lack a mechanism to quickly determine whether Hybrid Automatic Repeat Request (HARQ) is used in data transmission, which hinders efficient data processing and power management.
Innovation Solution
Incorporating a subfield in the EHT-SIG-A of the radio frame's preamble to indicate the use of HARQ, allowing communication devices to recognize and manage HARQ-based data transmission efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a subfield indicating HARQ usage is added to the EHT-SIG-A, then communication devices can quickly recognize whether HARQ is used in data transmission, but the structure of the radio frame becomes more complex
Solution Approach 1:
The HARQ indication information is nested within the existing EHT-SIG-A field structure of the radio frame preamble. By embedding the HARQ subfield inside the established signal field hierarchy, the patent enables quick HARQ recognition without adding a separate top-level structure, thus minimizing the increase in overall frame complexity while achieving the goal of rapid HARQ usage identification
Solution Approach 2:
The HARQ usage indication is placed in the preamble section of the radio frame, which is transmitted before the data field. This preliminary placement allows receiving devices to determine HARQ configuration in advance before processing the actual data, enabling proactive adjustment of reception parameters and efficient resource allocation without delaying data transmission
2Productivity
If HARQ with soft combining is used, then data transmission efficiency is improved, but the device complexity increases due to additional processing requirements
Solution Approach 1:
The patent enables receiving devices to autonomously determine whether HARQ is being used by checking the subfield in EHT-SIG-A, allowing them to self-adjust their processing mode without requiring complex external control mechanisms. Devices can independently switch between HARQ processing and conventional ARQ processing based on the indicated usage, reducing the need for complex coordination logic while maintaining high transmission efficiency
Data Source
AI summary
A communication device transmits a radio frame including a preamble and a data field of a physical layer (PHY). The preamble includes an L-STF (Legacy Short Training Field), an (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), and the EHT-SIG-A includes a subfield in which information concerning whether Hybrid Automatic Repeat request (HARQ) is used in transmission of data included in the data field is set.