HARQ Code Block Segmentation for EHT WLAN Throughput
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Solution Overview
Problem
There is a lack of effective communication apparatuses and methods for hybrid automatic repeat request (HARQ) operation in Extremely High Throughput (EHT) Wireless Local Area Network (WLAN), particularly in supporting better link adaptation and higher throughput compared to 802.11ax HE WLAN.
Innovation Solution
The disclosure provides communication apparatuses and methods that generate and transmit signals with a signal field indicating user-specific allocations, segmenting aggregate medium access control protocol data units (A-MPDUs) into code blocks, and receiving null data packets or MAC frames carrying HARQ feedback information, enabling HARQ operation in 802.11be EHT WLAN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HARQ operation is implemented in 802.11be EHT WLAN, then link adaptation and throughput are improved, but device complexity increases due to code block segmentation and feedback mechanisms
Solution Approach 1:
The A-MPDU is segmented into multiple code blocks, allowing selective HARQ feedback and retransmission at the code block level rather than requiring retransmission of the entire A-MPDU. This segmentation enables more granular error handling and improves throughput by retransmitting only failed code blocks.
Solution Approach 2:
The patent implements HARQ feedback mechanisms where the receiver sends feedback information about successfully received and failed code blocks to the transmitter. This feedback enables the transmitter to perform selective retransmission, improving link adaptation and overall throughput while managing complexity through structured feedback protocols.
2Productivity
If code block segmentation is applied to A-MPDU, then retransmission efficiency is improved, but processing complexity increases
Solution Approach 1:
The A-MPDU is divided into multiple code blocks with individual identification. This segmentation allows the receiver to identify and feedback only the failed code blocks, and the transmitter to retransmit only those specific code blocks, improving retransmission efficiency by avoiding redundant transmission of successfully received data.
Solution Approach 2:
Different code blocks within the A-MPDU can have different transmission qualities and error rates. The HARQ mechanism treats each code block locally, providing targeted feedback and retransmission for only those code blocks that failed, rather than treating the entire A-MPDU uniformly. This local quality approach improves efficiency while managing processing complexity.
Data Source
AI summary
The present disclosure provides a communication apparatus including circuitry, which, in operation, generates a transmission signal that includes a signal field and a data field, the signal field indicating one or more user-specific allocations in the data field. An aggregate medium access control protocol data unit (A-MPDU) transmitted in each of the one or more user-specific allocations is segmented into one or more code blocks. The communication apparatus includes a transmitter, which, in operation, transmits the generated transmission signal and a receiver, which, in operation, receives a null data packet (NDP) or a medium access control (MAC) frame carrying hybrid automatic repeat request (HARQ) feedback information for the one or more code blocks.