Sidelink Transmission State Feedback for Retransmission Control
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Solution Overview
Problem
Existing 5G communication systems face challenges in determining sidelink transmission failures, leading to inefficient resource allocation for retransmissions and suboptimal utilization of resources.
Innovation Solution
A method and device for feeding back sidelink transmission that allows a network device to determine data transmission success or failure on a sidelink, enabling it to allocate or refrain from allocating retransmission resources accordingly, using uplink feedback resources and processing capability information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device allocates retransmission resources to the terminal device without determining sidelink transmission status, then the terminal device can potentially recover from transmission failures, but resources are wasted on unnecessary retransmissions when transmission actually succeeds
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device sends sidelink transmission status information to the network device. The network device then determines whether to allocate retransmission resources based on this feedback. This resolves the contradiction by ensuring resources are allocated only when necessary, improving both transmission reliability and resource utilization efficiency.
2Reliability
If the network device determines sidelink transmission status by allocating retransmission resources, then transmission reliability improves, but resource allocation complexity and overhead increase
Solution Approach 1:
The patent introduces a feedback channel where terminal devices report sidelink transmission status to the network device. This simplifies the network device's determination process from actively managing retransmissions to reactively allocating resources based on reported status, reducing allocation complexity while maintaining reliability.
Solution Approach 2:
The terminal device autonomously determines its own transmission status and reports it to the network device, which then makes resource allocation decisions. This self-service approach reduces the network device's complexity by transferring part of the determination burden to the terminal device.
3Productivity
If the network device does not determine sidelink transmission status, then resource allocation is simpler and faster, but transmission failures cannot be identified and corrected
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices actively report their transmission status to the network device. This allows the network device to maintain simple and fast resource allocation processes while still obtaining the information needed to improve transmission reliability through targeted retransmission resource allocation.
Data Source
AI summary
The present application provides a method for feeding back a sidelink transmission state, comprising: a terminal device obtains an uplink feedback resource, the uplink feedback resource being used for transmitting sidelink feedback information; the terminal device performs sidelink feedback processing. The solution enables a network device to determine the data transmission state on a sidelink. After determining that data transmission on the sidelink fails, the network device can allocate retransmission resources to the terminal device, thereby improving success rate of sidelink transmission; or after determining that data transmission on the sidelink succeeds, the network device does not allocate retransmission resources to the terminal device any longer, thereby improving utilization of the resources.