Terminal Resource Selection Feedback for Sidelink Reliability
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Solution Overview
Problem
In wireless communication systems, especially in NR sidelink communication, autonomous resource selection between terminals can lead to unreliable communication due to differing resource quality perceptions between transmission and reception sides, particularly when another terminal is out of sight.
Innovation Solution
A terminal is equipped with a transmission unit to send a transport block using a resource selected from a pool, a reception unit to receive resource selection information from another terminal, and a control unit to select or reselect resources based on this information, ensuring improved communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If terminals autonomously select resources in resource allocation mode 2, then communication flexibility and autonomy are improved, but communication reliability deteriorates due to differing resource quality perceptions 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 caused by autonomous selection without feedback.
Solution Approach 2:
The patent applies preliminary action by having the reception-side terminal perform resource quality measurement and send feedback information before the transmission-side terminal makes its resource selection decision. This preliminary feedback enables the transmission side to choose resources that are actually suitable for reception, preventing reliability issues before they occur.
2Device complexity
If the transmission-side terminal performs sensing autonomously, then device complexity is reduced, but measurement precision deteriorates because the reception-side terminal may have significantly different resource quality perception
Solution Approach 1:
The patent introduces an intermediary approach where the reception-side terminal acts as the measurement reference. Instead of the transmission side autonomously sensing resources, the reception side measures resource quality and communicates this information back, making the reception side the intermediary that defines resource quality for the pair.
3Ease of operation
If resource selection is performed autonomously without coordination, then ease of operation is improved, but communication reliability worsens due to potential interference from other terminals
Solution Approach 1:
The patent uses feedback to enable coordination between terminals. The reception-side terminal provides feedback information about resource quality and detected interference, allowing the transmission-side terminal to make informed decisions that balance operational simplicity with communication reliability.
Data Source
AI summary
A terminal includes: a transmission unit configured to transmit transport block to a first terminal using a resource selected in a resource pool; a reception unit configured to receive information related to resource selection from another terminal; and a control unit configured to select or reselect a resource in the resource pool. The transmission unit transmits a transport block to the first terminal using the selected or reselected resource.