NR Sidelink Resource Allocation via Inter-UE Coordination Feedback
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Solution Overview
Problem
Current sidelink communication systems in New Radio (NR) V2X networks face challenges in resource allocation due to the lack of receiver-side information, leading to potential conflicts and reduced reliability, as they primarily rely on transmit-side sensing procedures without considering environmental factors at the receiver end.
Innovation Solution
The implementation of inter-UE coordination feedback mechanisms that allow receive UEs to provide feedback to transmit UEs, enabling the selection of preferred and non-preferred resource sets, and dynamic filtering procedures to enhance resource allocation decisions, thereby reducing conflicts and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transmit-side sensing procedures are used for resource allocation, then the system operation is simplified, but the reliability of resource allocation is reduced due to lack of receiver-side information
Solution Approach 1:
The patent implements inter-UE coordination feedback mechanisms where receiver UEs provide feedback information to transmit UEs about preferred and non-preferred resource sets. This feedback loop enables transmit UEs to make more reliable resource allocation decisions by considering receiver-side environmental factors, thereby resolving the contradiction between simplified operation and improved reliability.
Solution Approach 2:
The patent introduces feedback messages as an intermediary carrier that transmits receiver-side information from receiver UEs to transmit UEs. This intermediary mechanism allows transmit UEs to access previously unavailable receiver-side environmental information without fundamentally changing the distributed resource allocation architecture, thus improving reliability while maintaining ease of operation.
2Reliability
If inter-UE coordination feedback mechanisms are implemented, then the reliability of resource allocation is improved, but the device complexity increases
Solution Approach 1:
The patent segments the resource allocation process into distinct phases: sensing, feedback reception, and resource selection. By dividing the complex feedback processing into manageable segments with specific functions (identifying preferred resource sets, identifying non-preferred resource sets, and making allocation decisions), the system achieves improved reliability while keeping device complexity manageable through structured processing.
Solution Approach 2:
The patent performs preliminary actions by having receiver UEs pre-identify and report their preferred and non-preferred resource sets before transmit UEs make resource allocation decisions. This preliminary preparation of information reduces the complexity of real-time decision-making at transmit UEs, as the heavy lifting of environmental assessment is already completed by receiver UEs in advance.
3Reliability
If receiver UEs provide feedback information about preferred and non-preferred resource sets, then conflicts are reduced, but the loss of time for feedback transmission and processing occurs
Solution Approach 1:
The patent implements periodic feedback mechanisms where receiver UEs provide feedback information at regular intervals or triggered by specific events. This periodic action allows the system to balance conflict avoidance with time loss by updating resource allocation decisions at optimal intervals rather than continuously, thereby reducing unnecessary feedback overhead while maintaining effective conflict avoidance.
Data Source
AI summary
Various embodiments herein provide techniques related to resource selection for sidelink transmissions. In some embodiments, the resource selection procedure may related to identification of whether to use a first or second resource selection procedure. In some embodiments, the resource selection procedure may relate to removal of non-preferred resources from a list of candidate resources. Other embodiments may be described and/or claimed.