Trigger Frame HARQ Feedback Types for EHT WLAN Throughput
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Solution Overview
Problem
There is a need for communication apparatuses and methods that facilitate hybrid automatic repeat request (HARQ) operation in Extremely High Throughput (EHT) Wireless Local Area Networks (WLAN) to provide better link adaptation and higher throughput, as existing solutions have not adequately addressed HARQ operation in this context.
Innovation Solution
The implementation of communication apparatuses that generate and transmit trigger frames with user information fields indicating multiple HARQ feedback types, and receive and process trigger-based physical layer protocol data units (PPDUs) to support HARQ operations, enabling efficient data transmission and retransmissions in EHT WLAN environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HARQ operation is implemented in EHT WLAN to improve link adaptation and throughput, then system performance is improved, but device complexity increases due to multiple HARQ feedback types and trigger frame processing
Solution Approach 1:
The trigger frame is segmented into multiple user information fields, with each field corresponding to a specific user and indicating a particular HARQ feedback type. This segmentation allows the system to manage multiple HARQ processes independently while maintaining overall system throughput, resolving the contradiction by organizing complexity into manageable units
Solution Approach 2:
The trigger frame structure is designed with multi-functionality to support multiple HARQ feedback types (ACK, NACK, DTX) within a single frame format. This universal structure eliminates the need for separate trigger frames for each feedback type, reducing device complexity while maintaining the ability to improve throughput through selective feedback mechanisms
2Reliability
If multiple HARQ feedback types are indicated in user information fields to improve link adaptation, then reliability is improved, but information processing complexity increases
Solution Approach 1:
Each user information field within the trigger frame is assigned local quality by indicating a specific HARQ feedback type relevant to that user's transmission status. This localized indication allows the system to improve link adaptation for each user independently without requiring complex global processing, as each field self-containedly specifies the appropriate feedback mechanism
Solution Approach 2:
The system implements a feedback mechanism where the trigger frame explicitly indicates the HARQ feedback type that should be used for each user. This structured feedback approach improves reliability by ensuring the correct feedback mechanism is applied, while the automated nature of the feedback type indication reduces manual information processing complexity
Data Source
AI summary
Present disclosure provides a communication apparatus comprising circuitry, which, in operation, generates a first trigger frame that includes one or more user information fields, and a transmitter, which, in operation, transmits the generated trigger frame; wherein each of the one or more user information fields indicates one of more than one hybrid automatic repeat request (HARQ) feedback types.