Sidelink HARQ Feedback via PUCCH Intermediary

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Solution Overview

Problem

In new radio (NR) systems, there is a lack of specific steps and details on how a sidelink terminal transmits sidelink information, particularly for HARQ feedback mechanisms, which hinders efficient reliability and resource utilization in sidelink data transmissions.

Innovation Solution

A sidelink information transmission method that involves mapping sidelink information to target notification information and transmitting this information on a target resource, allowing terminals to effectively communicate sidelink HARQ-ACK information to control nodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sidelink HARQ feedback mechanism is introduced to improve transmission reliability, then the control node cannot directly know whether transmission is successful, requiring additional signaling steps

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidsignaling complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent uses the PUCCH channel as an intermediary to transmit sidelink HARQ feedback information from the terminal to the control node. Instead of direct sidelink feedback, the PUCCH serves as a mediator that carries the HARQ-ACK information through the uplink control channel, allowing the control node to indirectly obtain transmission status while maintaining system reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent enables the PUCCH channel to serve multiple functions: it not only carries uplink control information for downlink transmissions but also transports sidelink HARQ feedback information. This multi-functional use of existing infrastructure avoids the need for dedicated feedback channels, reducing overall system complexity while maintaining reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If terminal transmits sidelink information directly on sidelink, then resource utilization improves, but there is no discussion on specific steps and details of transmission

Engineering Contradiction:

Improveresource utilizationVSAvoidimplementation feasibility

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent pre-configures the terminal with the capability to map sidelink information to PUCCH resources and transmit through the uplink control channel. This preliminary setup ensures that when sidelink transmission status needs to be reported, the terminal already has the necessary mapping relationships and transmission procedures in place, making implementation straightforward and feasible.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The terminal autonomously performs the mapping of sidelink information to PUCCH resources and self-manages the transmission process without requiring complex external coordination. The terminal uses its own resources and capabilities to report feedback information, simplifying the overall system implementation while maintaining high resource utilization.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12267176B2Sidelink information transmission method, terminal, and control node

Publication Date: 2025.04.01 VIVO MOBILE COMM CO LTD

AI summary

Embodiments of this disclosure provide a sidelink information transmission method, a terminal, and a control node. The method includes: mapping sidelink information to target notification information; and transmitting the target notification information on a target resource.