V2X Resource Reservation and Collision Handling
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Solution Overview
Problem
In vehicle-to-everything (V2X) communication, resource collisions occur when multiple terminals transmit signals using the same time/frequency resources, leading to inefficiencies and challenges in reporting collision-related information, especially when the amount exceeds the capacity of assigned resources.
Innovation Solution
A method for transmitting V2X signals involves reserving multiple V2X transmission resources based on a single scheduling assignment, reselecting resources when collisions occur, and prioritizing the reporting of collision information to avoid repeated collisions, using energy detection and scheduling assignment analysis to determine resource overlap and collision severity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple terminals transmit V2X signals using the same time/frequency resources, then resource utilization is improved, but resource collisions occur leading to transmission failures
Solution Approach 1:
The patent applies preliminary action by performing resource reservation in advance through scheduling assignments. Terminals reserve V2X transmission resources before actual transmission occurs, allowing the system to plan resource allocation proactively and avoid collisions by pre-coordinating resource usage across multiple terminals.
Solution Approach 2:
The patent implements feedback mechanisms where terminals detect resource collisions and report collision-related information to the network. This feedback enables the network to adjust scheduling assignments and reassign resources dynamically, resolving the contradiction by using collision information to improve future resource allocation decisions.
2Device complexity
If a single scheduling assignment reserves multiple V2X transmission resources, then signaling overhead is reduced, but resource collision detection and resolution becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the collision detection and resolution process into distinct stages: resource reservation based on scheduling assignments, collision detection through energy measurement or decoding attempts, collision information reporting, and resource reselection. This segmentation manages complexity by handling each aspect separately rather than simultaneously.
Solution Approach 2:
The patent introduces collision information reporting as an intermediary mechanism between resource reservation and collision resolution. Terminals report collision-related information (such as resource indices or energy levels) to the network, which then mediates the resolution by providing updated scheduling assignments, simplifying the overall detection and resolution process.
3Loss of information
If collision-related information is reported for all detected collisions, then complete collision information is provided, but reporting capacity is exceeded when multiple collisions occur
Solution Approach 1:
The patent extracts only the most essential collision-related information for reporting, such as resource indices, energy levels, or collision severity indicators, rather than reporting all possible collision details. This extraction approach provides sufficient information for collision resolution while staying within reporting capacity constraints.
Solution Approach 2:
The patent applies partial action by reporting a subset of collision information that is sufficient for resolution rather than attempting to report all collision details. When reporting capacity is limited, the system reports partial collision information (e.g., only the most severe collisions or representative samples) to maintain operational effectiveness within resource constraints.
4Ease of operation
If V2X transmission resources are reserved without reselection, then resource allocation simplicity is maintained, but repeated collisions occur reducing transmission efficiency
Solution Approach 1:
The patent introduces dynamics by enabling resource reselection when collisions are detected. Instead of static resource allocation, terminals can dynamically change their assigned resources based on collision detection results, maintaining operational simplicity through standardized reselection procedures while improving transmission efficiency by avoiding repeated collisions on the same resources.
Data Source
AI summary
Provided are a method by which a terminal transmits a vehicle-to-everything (V2X) signal in a wireless communication system, and a terminal using the method. The method comprises: reserving a plurality of V2X transmission resources on the basis of one scheduling assignment; reselecting a V2X transmission resource if a resource collision occurs for a certain time or more among the plurality of reserved V2X transmission resources; and transmitting a V2X signal by using the reselected V2X transmission resource.