V2X Signal Transmission Using Hierarchical Time-Frequency Hopping
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting signals for V2X communication, particularly in resource allocation and frequency hopping, which are not adequately addressed by existing technologies like LTE, leading to limitations in cost reduction, service availability, and power consumption.
Innovation Solution
A method for transmitting vehicle-to-everything (V2X) signals using a hierarchical time-frequency hopping approach, where resource units of varying sizes are configured to apply time-frequency hopping within each other, allowing for flexible resource allocation and addressing the half-duplex problem, thereby enhancing channel diversity and signal transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hierarchical time-frequency hopping is implemented for V2X signal transmission, then channel diversity is improved and the half-duplex problem is resolved, but device complexity increases
Solution Approach 1:
The resource pool is segmented into multiple resource units with different sizes (first size and second size), allowing the system to handle different V2X signal types and transmission requirements independently. This segmentation enables flexible resource allocation while maintaining manageable device complexity through modular resource management.
Solution Approach 2:
Resource units of different sizes are nested within the same resource pool, with smaller resource units contained within or alongside larger ones. This nested structure allows efficient packing of resources and enables the system to allocate appropriate resource unit sizes based on transmission needs, improving channel diversity while avoiding excessive complexity.
2Adaptability or versatility
If resource units of varying sizes are configured for flexible resource allocation, then service availability is improved, but device complexity increases
Solution Approach 1:
The system dynamically selects resource unit sizes based on transmission requirements, allowing flexible adaptation to different V2X service types (e.g., BSR, PHR, data transmissions). This dynamic allocation improves service availability by matching resource granularity to actual needs while keeping device complexity manageable through rule-based selection criteria.
Solution Approach 2:
The resource allocation mechanism changes the parameter of resource unit size according to transmission requirements. By varying this parameter dynamically, the system achieves flexible resource allocation for different services without requiring completely different allocation mechanisms, thus balancing adaptability and complexity.
3Reliability
If time-frequency hopping is applied within resource units, then channel diversity is enhanced, but loss of time increases due to hopping overhead
Solution Approach 1:
Time-frequency hopping is applied periodically within resource units, creating structured opportunities for channel diversity while maintaining predictable timing patterns. This periodic approach ensures adequate channel sampling without excessive hopping frequency, balancing channel diversity benefits against time loss from hopping overhead.
Data Source
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AI summary
The present invention relates to a method and a device for transmitting a vehicle to everything (V2X) signal of user equipment for V2X communication in a wireless communication system. Particularly, the present invention comprises the steps of: receiving a resource pool configuration of which a first resource unit and a second resource unit, set for V2X communication, are defined; and transmitting the V2X signal, according to the resource pool configuration, through a specific resource region among the entire time-frequency hopped resource region, wherein the first resource unit is a multiple of the second resource unit, a first resource region corresponding to the first resource unit comprises a plurality of second resource regions corresponding to the second resource unit, and with respect to time-frequency hopping, frequency axis-based hopping or time axis-based hopping is determined according to a period of the V2X signal.