Direct HARQ Feedback Multiplexing in V2X Uplink Channels
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Solution Overview
Problem
In Vehicle to Everything (V2X) technologies, direct communication methods face resource conflicts due to overlapping timing of Hybrid Auto Repeat Request (HARQ) feedback and uplink information, leading to inefficiencies in data transmission.
Innovation Solution
A data transmission method where HARQ feedback information and uplink information are sent on the same physical layer uplink channel within a target time unit, satisfying a predetermined timing relationship to avoid resource conflicts and ensure timely processing, allowing for efficient multiplexing transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct HARQ feedback information and uplink information are sent on separate channels, then channel resource allocation is simplified, but resource conflicts occur due to overlapping timing
Solution Approach 1:
The patent merges direct HARQ feedback information and uplink information into the same physical uplink channel for transmission. This is achieved by multiplexing the feedback information with uplink control information or uplink data, thereby utilizing existing channel resources and avoiding the need for separate channel allocation while resolving resource conflicts.
Solution Approach 2:
The physical uplink channel is designed to serve multiple functions: transmitting both direct HARQ feedback information and uplink information (control information or data). This multi-functionality allows the same channel resource to handle different types of transmissions without requiring separate dedicated channels for each purpose.
2Productivity
If HARQ feedback information is sent separately, then timing alignment is simpler, but resource conflicts and transmission inefficiencies occur
Solution Approach 1:
The patent combines HARQ feedback information transmission with uplink information transmission in the same time unit and channel, thereby improving resource utilization and transmission efficiency while managing timing alignment through established multiplexing procedures.
3Productivity
If multiplexing transmission is implemented, then resource utilization improves, but processing complexity increases
Solution Approach 1:
The patent implements multiplexing by combining HARQ feedback information with uplink control information or uplink data in the same physical channel. The feedback information is processed and transmitted together with existing uplink transmissions, utilizing established multiplexing mechanisms to manage processing complexity.
Data Source
AI summary
A data transmission method, and a device are provided. The method includes: when direct hybrid auto repeat request HARQ feedback information and uplink information are to be sent within a target time unit, and the direct HARQ feedback information and the uplink information satisfy a predetermined timing relationship, sending, by a first terminal, the direct HARQ feedback information and the uplink information to an access network device on the same physical layer uplink channel within the target time unit. The direct HARQ feedback information is configured to indicate a receiving state corresponding to direct data, and the direct data is physical layer data sent by the first terminal to a second terminal through a direct link.