V2X Communication Device Multi-Transceiver Channel Access
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Solution Overview
Problem
In V2X communication, providing reliable and efficient multi-channel access for various services is challenging due to the need for flexible and efficient allocation of intervals, particularly for safety-related services which require high reliability and low latency.
Innovation Solution
A data communication method using a V2X communication device with multiple transceivers, where service advertisement information is received through a control channel using one transceiver and service data is received through a service channel based on the advertisement information, with specific time units allocated for safety and non-safety services, including critical safety intervals, to minimize contention and enhance resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple frequency bands are used for various V2X services, then service diversity and functionality are improved, but communication contention and interference between services increase
Solution Approach 1:
The patent segments the communication resources by dividing the sync interval into distinct first time unit and second time unit, and by separating control channel and service channel operations. This segmentation allows different services to operate in dedicated time-frequency resources, reducing contention while maintaining service diversity across multiple frequency bands.
2Reliability
If safety-related services are prioritized with dedicated time slots, then delivery reliability and latency are improved, but resource utilization efficiency for non-safety services deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the sync interval structure allows flexible assignment of first and second time units. Safety-critical services are guaranteed dedicated resources in the first time unit, while the second time unit can be dynamically allocated to non-safety services based on traffic demand, thus maintaining both high reliability for safety services and efficient resource utilization overall.
3Productivity
If multi-channel access is implemented for various services, then service capacity and throughput are improved, but channel contention and access complexity increase
Solution Approach 1:
The patent employs periodic sync intervals with a structured pattern of first and second time units. This periodic structure simplifies channel access by providing predictable, repeating opportunities for different services to access their designated channels, reducing access complexity compared to ad-hoc multi-channel approaches while maintaining high service throughput through dedicated service channels.
Data Source
AI summary
A data communication method for a V2X communication apparatus is disclosed. A data communication method for a V2X communication apparatus including a plurality of transceivers according to an embodiment of the present invention comprises the steps of: receiving service advertisement information over a control channel (CCH) by using a first transceiver; and receiving, on the basis of the service advertisement information, service data over a service channel (SCH) by using a second transceiver, wherein accessing the control channel is performed on the basis of a sync interval, and the sync interval includes a first time unit and a second time unit.