V2X Multi-Channel Operation Method for Safety Services
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Solution Overview
Problem
In V2X communication, there is a need for a flexible and efficient configuration of time intervals for multi-channel operation to ensure high reliable forwarding and provision of safety services, particularly in environments using multiple frequency bands.
Innovation Solution
A multi-channel operation method for V2X communication devices that involves accessing a control channel for service advertisement and a service channel for data transmission, with channel access based on a sync interval comprising a CCH interval and an SCH interval, and an enhanced mode allowing control signal exchange during both intervals to minimize contention and optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple frequency bands are used for V2X communication, then service diversity and capacity are improved, but channel contention and latency increase
Solution Approach 1:
The patent segments the communication channels into control channels (CCH) and service channels (SCH), with further subdivision into CCH intervals and SCH intervals within sync intervals. This segmentation allows different types of traffic to be handled in dedicated time slots, reducing channel contention and latency by preventing collisions between control and data transmissions.
Solution Approach 2:
The patent implements periodic sync intervals that alternate between CCH intervals and SCH intervals. This periodic structure enables predictable channel access patterns, where control information is exchanged during CCH intervals and service data is transmitted during SCH intervals, thereby reducing random contention and improving timing predictability for safety services.
2Ease of operation
If control channel and service channel operations are separated, then channel access organization is improved, but system complexity increases
Solution Approach 1:
The patent merges the control channel and service channel operations into a unified multi-channel framework where both CCH and SCH share the same physical medium but are separated in time within sync intervals. This approach improves channel access organization through structured time-division multiplexing while avoiding the need for completely separate physical channels, thereby limiting the increase in system complexity.
Solution Approach 2:
The patent introduces dynamic channel coordination modes that can adaptively switch between different operational patterns. The system can dynamically adjust the allocation of CCH and SCH intervals within sync intervals based on traffic conditions, allowing flexible optimization of channel access organization without requiring rigid fixed structures that would increase complexity.
3Productivity
If enhanced mode is used for channel coordination, then resource utilization efficiency is improved, but implementation complexity increases
Solution Approach 1:
The patent employs parameter changes by introducing an enhanced coordination mode that modifies the timing and allocation parameters of CCH and SCH intervals within sync intervals. This enhanced mode optimizes resource utilization by adjusting interval durations and frequencies based on service requirements, particularly for safety services, while maintaining a parameter-based configuration approach that limits implementation complexity through standardized parameter sets.
Data Source
AI summary
Disclosed is a multi-channel operation method of a V2X communication device. The multi-channel operation method according to an embodiment of the present invention includes accessing a control channel (CCH) for a service advertisement information exchange, receiving the service advertisement information via the accessed control channel, accessing a service channel (SCH) for the transmission or reception of service data for service provision based on the service advertisement information, and receiving the service data via the service channel.