Wireless Feedback Channel Retransmission Using Auxiliary Resource Cues
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Solution Overview
Problem
In wireless communication systems, particularly in NR-V2X sidelink mode 2, resource conflicts during retransmission lead to reduced reliability and increased delay due to hidden node problems, as transmitting devices select resources without knowing the allocation status of other devices within their communication range.
Innovation Solution
The receiving-side electronic device feeds back auxiliary information to the transmitting-side device to help determine appropriate resources for retransmission, avoiding conflicts by providing information on resources used by other devices, enabling the transmitting-side to select or reselect resources based on this feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transmitting devices select resources independently without knowing other devices' allocation status, then device complexity is reduced and ease of operation is improved, but resource conflicts occur leading to reduced reliability and increased delay
Solution Approach 1:
The patent implements a feedback mechanism where the receiving device sends auxiliary information back to the transmitting device about resource usage status. This feedback loop enables the transmitting device to adjust its resource selection for retransmission based on actual channel conditions and resource availability, resolving the contradiction between simple independent selection and reliable retransmission.
Solution Approach 2:
The patent performs preliminary resource sensing and auxiliary information acquisition before retransmission. The receiving device proactively provides information about resource usage status in advance, allowing the transmitting device to pre-determine suitable resources for retransmission, avoiding conflicts before they occur.
2Device complexity
If transmitting devices use blind retransmission without resource conflict detection, then device complexity is reduced, but retransmission delay increases due to resource conflicts
Solution Approach 1:
The auxiliary information from the receiving device acts as an intermediary that bridges the transmitting device and the actual resource usage status. This intermediary information allows the transmitting device to make informed resource selection without complex direct detection mechanisms, reducing complexity while avoiding delays from blind retransmission.
3Reliability
If the receiving device provides detailed auxiliary information about resource usage, then resource conflict avoidance is improved, but feedback channel overhead increases
Solution Approach 1:
The patent applies local quality by providing auxiliary information selectively and selectively processing it. The receiving device provides resource usage information only for relevant resources, and the transmitting device processes only the necessary portions of this information for its specific retransmission needs, optimizing the balance between accuracy and overhead.
Data Source
AI summary
The present disclosure relates to method and device for enhancing feedback channel in wireless communication. There is provided a receiving-side electronic device for a receiving side of a communication system, which includes a processing circuit configured to receive initial transmission information from a first electronic device among more than one transmitting-side electronic devices for a transmitting side of the communication system; in case that data information in the initial transmission information cannot be successfully decoded, acquire auxiliary information; and feedback the auxiliary information to the first electronic device, so that the first electronic device can perform the information retransmission by using the resources determined based on the auxiliary information.