In-Vehicle Communication Control Device Queue Status Monitoring
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Solution Overview
Problem
In on-vehicle communication systems, when connected to external networks, out-of-vehicle communication devices may transmit information that exceeds buffer capacity, leading to discarded data and reduced information transmission efficiency due to lack of free space in target devices.
Innovation Solution
A communication control device and method that acquire status information of queues in switching devices to determine if communication data can be transmitted without overflowing, allowing for speed restriction or cessation of transmission to prevent overflow, thereby optimizing data transmission from external devices to out-of-vehicle communication devices within the vehicle network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the out-of-vehicle communication device transmits communication data to the switching device, then the information transmission efficiency is improved, but the queue buffer may overflow causing data loss
Solution Approach 1:
The communication control device performs preliminary actions by acquiring queue status information before transmission and determining transmission restriction in advance. This prevents buffer overflow by proactively controlling transmission based on current queue conditions, ensuring data integrity while maintaining transmission efficiency.
Solution Approach 2:
The system implements feedback by continuously monitoring queue status information and using this feedback to dynamically adjust transmission restrictions. The communication control device acquires queue status, determines appropriate restriction levels, and applies them to control transmission from external devices, creating a closed-loop control system that balances transmission efficiency and data integrity.
2Productivity
If the transmission speed is increased to improve communication efficiency, then the productivity is improved, but the buffer overflow risk increases causing data loss
Solution Approach 1:
The transmission restriction is made dynamic rather than static. The communication control device continuously acquires queue status information and adjusts transmission restrictions based on real-time conditions. This dynamic adaptation allows the system to optimize communication efficiency when buffers are available while preventing data loss when buffers are near capacity.
Solution Approach 2:
The system changes transmission parameters (restriction levels) based on queue status. By monitoring buffer occupancy and adjusting transmission restrictions accordingly, the system optimizes communication efficiency when space is available and prevents data loss when buffers are full, adapting transmission characteristics to current system state.
3Quantity of substance
If the queue buffer size is increased to store more data, then the data storage capacity is improved, but the device complexity and resource consumption increase
Solution Approach 1:
The communication control device performs self-service by autonomously monitoring queue status and determining transmission restrictions without requiring manual intervention or complex external control systems. This self-regulating mechanism manages buffer utilization efficiently without adding significant system complexity.
Solution Approach 2:
The system uses feedback from queue status monitoring to automatically control transmission restrictions. This closed-loop approach allows the system to efficiently manage buffer capacity and prevent overflow without requiring oversized buffers or complex external management infrastructure.
Data Source
AI summary
A communication control device used in an on-vehicle communication system including an out-of-vehicle communication device being one of a plurality of function units provided in a vehicle and being capable of communicating with an external device outside the vehicle, and a switching device being capable of relaying communication data from one of the function units to another one of the function units, comprises: an acquisition unit that acquires status information indicating a status of a queue for storing in the switching device at least communication data from the out-of-vehicle communication device; and a control unit that determines restriction of transmission of communication data from the external device to the out-of-vehicle communication device based on the status information acquired by the acquisition unit.