HARQ Feedback Merging for Wireless Overhead Reduction

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Solution Overview

Problem

Current wireless communication systems, particularly in 5G NR, face inefficiencies due to repetitive Hybrid Automatic Repeat Request (HARQ) processes being transmitted multiple times, leading to increased overhead and reduced performance.

Innovation Solution

A method and apparatus for identifying and transmitting repetitive HARQ processes only once, by receiving requests for different types of HARQ codebooks, identifying repetitive processes, and transmitting feedback accordingly, thereby reducing redundant data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If feedback for repetitive HARQ processes is transmitted multiple times, then reliability of feedback delivery is improved, but overhead and resource consumption increase

Engineering Contradiction:

Improvefeedback delivery reliabilityVSAvoidfeedback overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines multiple feedback transmissions for repetitive HARQ processes into a single unified feedback message. The wireless device identifies repetitive HARQ processes across different codebooks and merges their feedback into one transmission, eliminating redundant feedback messages while maintaining reliable delivery to the network entity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal feedback mechanism that handles both repetitive and non-repetitive HARQ processes through a single feedback transmission framework. This multi-functional approach allows the system to deliver feedback for multiple process types simultaneously, reducing overall overhead while maintaining comprehensive coverage.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If feedback for repetitive HARQ processes is transmitted multiple times, then feedback delivery is ensured, but system performance deteriorates due to redundancy

Engineering Contradiction:

Improvefeedback deliveryVSAvoidsystem performance

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent merges multiple feedback transmissions into one consolidated feedback message for repetitive HARQ processes. This combining approach ensures reliable delivery to the network entity while eliminating the performance-deteriorating redundancy of multiple separate transmissions.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If feedback for repetitive HARQ processes is transmitted multiple times, then feedback completeness is improved, but resource consumption increases

Engineering Contradiction:

Improvefeedback completenessVSAvoidtransmission energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent combines feedback for repetitive HARQ processes into a single transmission event, maintaining complete feedback delivery to the network entity while significantly reducing the energy consumption associated with multiple separate transmissions.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20230344559A1Transmitting feedback for repetitive HARQ processes

Publication Date: 2023.10.26 QUALCOMM INC

AI summary

Example implementations include a method, apparatus and computer-readable medium of wireless communication, comprising receiving a request for a first type of hybrid automatic repeat request (HARQ) codebook and a second type of HARQ codebook. The implementations further include identifying one or more HARQ processes in the first type of HARQ codebook that are repetitive in the second type of HARQ codebook. Additionally, the implementations further include transmitting corresponding feedback of the one or more repetitive HARQ processes only once to a network entity.