Multi-Channel Vehicular Communication Apparatus
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Solution Overview
Problem
In wireless communication networks, especially in vehicular environments, the single channel-based CSMA/CA method leads to increased probability of communication delays and failures due to frequent packet collisions and lack of priority for emergency data transmission.
Innovation Solution
A multi-channel operation method and apparatus for vehicle or roadside base station communication systems, utilizing a channel synchronization unit and data transmitting/receiving unit to alternate between control and service channels based on user priority orders and random backoff times, ensuring efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single channel-based CSMA/CA method is used, then device complexity is reduced, but communication reliability deteriorates due to frequent packet collisions in high-density vehicular environments
Solution Approach 1:
The patent divides a single radio channel into multiple logical channels (control channel and service channels) that can be alternately accessed. This segmentation allows different types of data to be transmitted on different channels, reducing packet collisions and improving communication reliability in vehicular environments without requiring multiple physical radio frequencies.
Solution Approach 2:
The patent implements periodic switching between control channel and service channels using a defined channel interval structure. Each channel interval contains a control channel portion followed by a service channel portion, creating a periodic pattern that organizes channel access and reduces collisions while maintaining manageable system complexity.
2Device complexity
If a single channel-based CSMA/CA method is used, then device complexity is reduced, but transmission delay increases due to lack of priority handling for emergency data
Solution Approach 1:
The patent assigns different qualities or priorities to different channels: the control channel is designated for high-priority emergency data and control messages, while service channels handle general data traffic. This local differentiation of channel quality enables priority-based transmission without complex device architecture, reducing delay for critical communications.
3Adaptability or versatility
If the quantity of communication nodes increases, then network coverage is improved, but communication reliability deteriorates due to increased packet collision probability
Solution Approach 1:
The patent segments the available transmission opportunities into multiple channels (control and service channels) that are alternately activated. This segmentation allows multiple communication nodes to access the network simultaneously on different channels, maintaining reliability even as node quantity increases and network coverage expands.
Solution Approach 2:
The periodic alternation between control channel intervals and service channel intervals creates structured transmission opportunities that scale well with network size. Each period provides dedicated control and data transmission slots, allowing numerous nodes to coordinate access systematically, improving reliability as node density increases.
Data Source
AI summary
In a vehicle communication system, a multi channel operation apparatus for communication of a vehicle or a road side base station operates a multi channel in one physical layer and differentially transmits a frame through a corresponding channel according to a user priority order value of a frame to transmit.