Side Link Feedback Resource Allocation in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving feedback information for side link messages, particularly in D2D and V2X communication scenarios, where resource collisions and interference affect data transmission and reception.
Innovation Solution
A method where a first UE selects a first resource for message transmission and determines a second resource for feedback, based on the position of the first resource, to transmit feedback information on the second resource, which can include acknowledgement or collision information, using energy levels and SINR to assess collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If feedback information is transmitted on the same resource as the side link message, then resource utilization is improved, but resource collision and interference increase
Solution Approach 1:
The patent divides the feedback transmission into two separate resources: the first resource for side link message transmission and the second resource for feedback information transmission. This segmentation prevents resource collision while maintaining efficient resource utilization by dedicating specific resources to specific functions.
Solution Approach 2:
The patent introduces a second resource as an intermediary channel for feedback transmission. This intermediary resource acts as a mediator between the message transmission and the feedback, allowing feedback to be transmitted without directly conflicting with the original message resource.
2Object-affected harmful factors
If a separate second resource is allocated for feedback transmission, then resource collision is reduced, but resource overhead increases
Solution Approach 1:
The patent dynamically determines the second resource based on the first resource selection. The second resource is determined to be dependent on the position of the first resource, allowing the system to adapt resource allocation dynamically rather than using fixed overhead resources, thus reducing overall resource overhead while maintaining collision avoidance.
3Productivity
If feedback transmission is implemented in D2D/V2X communication, then network load is reduced, but feedback reliability decreases due to direct link limitations
Solution Approach 1:
The patent implements a structured feedback mechanism where feedback information is transmitted on a dedicated second resource. This feedback channel allows receiving UEs to provide acknowledgments, collision information, and other feedback about the side link message, improving reliability through explicit feedback while maintaining the benefits of direct D2D/V2X communication for load reduction.
Data Source
AI summary
An embodiment of the present invention relates to a method for transmitting or receiving a side link signal by a first terminal in a wireless communication system, the method comprising the steps of: selecting a first resource through which the first terminal will transmit a message; determining a second resource, which is determined dependent on the position of the selected first resource and is to be used for performing feedback; and transmitting feedback information on the message and the second resource, wherein the feedback information is feedback information relating to a broadcast message received through at least a part of the second resource.