NR Sidelink Resource Re-Evaluation for Preemption Detection
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Solution Overview
Problem
In resource allocation mode 2 for NR sidelink communication, there is no effective method to determine whether a reserved resource has been preempted by another terminal, leading to potential transmission collisions or interference.
Innovation Solution
A re-evaluation mechanism is implemented at a first time point to assess target resources, including reserved resources at a second time point and periodic resources within a resource period, to identify preemption and facilitate resource reselection, thereby avoiding transmission collisions or interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource allocation mode 2 is used for autonomous resource selection, then terminal autonomy and flexibility are improved, but transmission reliability deteriorates due to inability to detect preemption
Solution Approach 1:
The terminal performs re-evaluation of reserved resources at a first time point before the second time point when resource reservation information is sent. This preliminary action allows the terminal to detect preemption early and perform resource reselection in advance, preventing transmission collisions while maintaining autonomous operation mode 2
Solution Approach 2:
The patent implements a feedback mechanism where the terminal monitors and evaluates its reserved resources by detecting preemption indicators from other terminals. This feedback loop enables the terminal to identify preempted resources and trigger resource reselection, thereby maintaining transmission reliability in autonomous mode 2 operation
2Reliability
If resource reselection is performed to avoid transmission collision, then transmission reliability is improved, but time loss increases due to resource re-evaluation and reselection processes
Solution Approach 1:
Resource re-evaluation is performed at a first time point before the second time point, allowing early detection of preemption. This timing arrangement enables the terminal to initiate resource reselection in advance, avoiding last-minute conflicts and reducing the actual time loss during transmission
Solution Approach 2:
The patent implements dynamic resource management where the terminal continuously monitors resource status and adaptively performs reselection only when preemption is detected. This dynamic approach avoids unnecessary reselection operations, reducing time loss while maintaining reliability when actually needed
Data Source
AI summary
A resource processing method, a resource processing apparatus, and a terminal, and pertains to the field of communications technologies. The method includes: performing re-evaluation on a target resource at a first time point, where the target resource includes at least one of the following: a first reserved resource corresponding to a second time point; a second reserved resource indicated by first resource reservation information; and a third reserved resource indicated by the first resource reservation information; where the first resource reservation information is to be sent at the second time point, the first time point is before the second time point, the second reserved resource is an aperiodic resource, and the third reserved resource is a resource within a resource period of a periodic resource.