Sidelink Terminal Resource Collision Prevention via Feedback
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Solution Overview
Problem
In NR sidelink communication, autonomous resource selection by terminals can lead to unreliable communication due to differences in resource quality between transmission and reception sides, particularly when other terminals are unviewable, causing interference and reducing communication reliability.
Innovation Solution
A terminal is configured to receive reservation information from multiple terminals, identify a first terminal, and transmit information related to the same resource, allowing it to receive data from a second terminal in the same resource, thereby improving communication reliability by preventing resource collisions and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminals autonomously select resources in D2D communication, then communication flexibility and power saving are improved, but communication reliability deteriorates due to resource quality differences between transmission and reception sides
Solution Approach 1:
The patent implements a feedback mechanism where the reception side terminal measures resource quality and feeds back this information to the transmission side terminal. This allows the transmission side to adjust its resource selection based on actual reception conditions, resolving the reliability issue while maintaining autonomous operation.
Solution Approach 2:
The patent introduces resource quality information as an intermediary element that mediates between the autonomous resource selection and reliable communication. This information acts as a bridge, allowing terminals to make informed decisions without direct base station control.
2Use of energy by moving object
If terminals perform partial sensing for power saving, then energy consumption is reduced, but resource quality assessment accuracy deteriorates due to limited sensing scope
Solution Approach 1:
The patent enables terminals to self-adjust their sensing strategy based on their specific situation. Terminals can perform partial sensing when power saving is critical and supplement with additional measurements when reliability is more important, allowing each terminal to optimize its own energy-quality tradeoff.
Solution Approach 2:
The patent allows terminals to dynamically change sensing parameters such as sensing window size and measurement frequency based on current communication requirements and battery status, enabling flexible adaptation between power saving and measurement accuracy.
3Speed
If the transmission side terminal selects resources based on its own sensing results, then resource selection speed is improved, but resource collision probability increases due to unviewable terminals causing interference
Solution Approach 1:
The patent implements preliminary resource quality measurement and feedback before actual data transmission. By assessing resource quality in advance and sharing this information, terminals can avoid collisions without significantly delaying the communication process.
Solution Approach 2:
The reception side terminal provides feedback about resource quality and potential interference to the transmission side. This feedback loop enables the transmission side to adjust its resource selection to avoid collisions with unviewable terminals while maintaining fast resource selection.
Data Source
AI summary
Provided is a terminal including: a receiving unit configured to receive reservation information for reserving resources from a plurality of terminals, at least one of the reserved resources being a same resource; a controlling unit configured to identify a first terminal from among the plurality of terminals; and a transmitting unit configured to transmit information related to the same resource to the first terminal, wherein the receiving unit receives data from a second terminal in the same resource.