V2X Resource Reselection via Terminal Collaboration
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Solution Overview
Problem
The hidden station problem affects the re-evaluation and pre-emption determination of selected resources in V2X sidelink communication systems, leading to reduced communication reliability due to the inability to correctly decode sidelink control information and measure SL-RSRP, resulting in resource collisions and interference.
Innovation Solution
A resource reselection method and device that involves collaboration between terminals to perform resource exclusion and reselection, where one terminal transmits priority data and resource sets to assist the other in determining resource availability and pre-emption, using parameters like resource selection windows to mitigate the hidden station issue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If terminals perform resource selection autonomously without coordination, then resource selection speed is improved, but communication reliability deteriorates due to hidden station problem
Solution Approach 1:
The patent introduces a coordination mechanism where terminals exchange resource set information and exclusion results through message transmission. This intermediary coordination process allows terminals to share resource availability knowledge, resolving the hidden station problem while maintaining efficient autonomous selection. The coordination message acts as a mediator that enables reliable resource allocation without central control.
2Measurement precision
If terminals perform re-evaluation of selected resources, then resource allocation accuracy is improved, but time consumption increases due to hidden station problem impact
Solution Approach 1:
The patent implements preliminary resource exclusion procedures where terminals pre-determine excluded resources based on received resource set information before final selection. By performing this exclusion action in advance and sharing results through coordination messages, terminals avoid time-consuming re-evaluation processes during actual resource selection, thus reducing re-evaluation time while maintaining accuracy.
3Reliability
If terminals transmit resource set information for coordination, then resource management reliability is improved, but information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential resource set information and exclusion results needed for coordination, rather than transmitting complete resource management data. By taking out and transmitting only the critical exclusion status and resource availability information, the system achieves reliable resource management with minimized information transmission overhead.
Data Source
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AI summary
A resource reselection method and apparatus, and a device and a storage medium, which relate to the field of communications. The method comprises: a first terminal sending, to a second terminal, a priority of data to be sent (102); the first terminal receiving a resource set sent by the second terminal (110); and when re-evaluating a selected resource or determining whether the selected resource is preempted by other terminals, the first terminal determining, according to the resource set, whether to perform reselection regarding the selected resource (112).