V2X User Equipment Resource Selection via Sensing
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Solution Overview
Problem
In V2X communication, the method of user equipment autonomously selecting resources for D2D signals leads to resource conflicts and delays, particularly in high-density and high-speed scenarios, as existing sensing-based resource selection methods may result in signal collisions and increased transmission delays.
Innovation Solution
The user equipment employs a resource selection method that includes a detection unit for sensing available resources, a selection unit for choosing resources within a limited selection window, and a transmission unit for transmitting signals using these selected resources, with optional reservation windows to reduce conflicts and delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user equipment autonomously selects resources for D2D signal transmission, then resource allocation flexibility is improved, but resource conflicts and signal collisions occur
Solution Approach 1:
The patent applies preliminary action by performing sensing in advance to detect resources occupied by other user equipment before selecting transmission resources. The sensing window is set prior to the resource selection window, allowing the system to identify and avoid resources that would cause collisions, thus resolving the contradiction between autonomous resource selection flexibility and signal collision prevention
Solution Approach 2:
The patent implements feedback by using sensing results from detected D2D signals to inform resource selection decisions. The system continuously monitors the radio environment, feeds back occupancy information to the resource selection process, and adjusts resource choices based on this feedback to avoid conflicts while maintaining autonomous selection capability
2Measurement precision
If sensing window size is increased to detect more occupied resources, then resource selection accuracy is improved, but time delay for resource selection increases
Solution Approach 1:
The patent applies segmentation by dividing the sensing process into distinct time windows: a sensing window for detecting occupied resources and a subsequent resource selection window for choosing transmission resources. This segmentation allows the system to perform comprehensive sensing without extending the total time delay, as the sensing and selection phases are separated in time
Solution Approach 2:
The patent uses preliminary action by completing the sensing operation in advance during a dedicated sensing window before the resource selection window begins. This allows thorough detection of occupied resources to be performed beforehand, so that when resource selection occurs, the decision can be made quickly based on already-acquired sensing information
Data Source
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AI summary
There is provided user equipment that selects a resource for transmitting a signal based on a sensing result. The user equipment includes a detection unit that detects, by performing sensing in a time window for sensing, one or more resources capable of transmitting a signal in a time window for resource selection after the time window for sensing; a selection unit that selects a resource for transmitting a signal from the one or more detected resources; and a transmission unit that transmits the signal using the selected resource for transmitting the signal.