Sidelink NACK Feedback for Uplink Resource Utilization
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Solution Overview
Problem
In Vehicle to Everything (V2X) systems, when terminal devices transmit sidelink data that does not require sidelink feedback, the allocated uplink resources are wasted as there is no mechanism for utilizing these resources effectively.
Innovation Solution
The terminal device sends a Negative Acknowledgment (NACK) on the uplink resource when sidelink data does not need sidelink feedback, triggering the network device to allocate a retransmission resource, thereby optimizing the use of uplink resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminal device transmits sidelink data without sidelink feedback on allocated sidelink resource, then transmission simplicity is improved, but uplink resource utilization deteriorates due to wasted uplink resources
Solution Approach 1:
The patent introduces a feedback mechanism where the terminal device sends NACK or ACK to the network device on uplink resources based on whether sidelink feedback is needed. This feedback allows the network device to intelligently allocate retransmission resources, transforming the wasted uplink resources into useful control information that optimizes resource utilization while maintaining transmission simplicity
2Loss of energy
If terminal device sends NACK to network device on uplink resource when sidelink data does not need feedback, then uplink resource utilization is improved, but device complexity increases due to additional signaling
Solution Approach 1:
The uplink resource serves multiple functions: it carries both traditional uplink data and the new NACK/ACK feedback for sidelink transmission status. By making the uplink resource multi-functional, the patent improves resource utilization without requiring separate dedicated feedback channels, thereby limiting the increase in signaling complexity
3Reliability
If network device allocates retransmission resource based on NACK from terminal device, then transmission reliability is improved, but resource allocation complexity increases
Solution Approach 1:
The terminal device autonomously determines whether sidelink feedback is needed and self-generates the NACK/ACK feedback without requiring complex network device intervention. This self-service approach simplifies the resource allocation process for the network device, as it only needs to respond to clear feedback signals rather than making complex decisions about when retransmission is needed
Data Source
AI summary
Disclosed are an information sending method and apparatus, an information receiving method and apparatus, and a device and a storage medium, wherein same relate to the field of mobile communications. The information sending method comprises: a terminal device sending a negative acknowledgement (NACK) to a network device on an uplink resource when sidelink data transmitted on a sidelink resource does not need sidelink feedback. The information receiving method comprises: a network device receiving a NACK sent by a terminal device on an uplink resource; and allocating a retransmission resource of sidelink data to the terminal device according to the NACK. By means of the present application, uplink resources can be effectively utilized, and the transmission success rate of sidelink data and the resource utilization rate of the uplink resources can be improved.