Communication Apparatus Malfunction Diagnosis With Congestion Control
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Solution Overview
Problem
Existing communication systems face challenges in performing malfunction diagnosis without obstructing the transmission and reception of other information, particularly in vehicle-vehicle communication systems where high response rates can hinder normal communication functions.
Innovation Solution
A communication system that includes a first and second communication apparatus, where the first apparatus transmits a signal to specify itself and the second apparatus responds only when the congestion degree is below a predetermined threshold, allowing for malfunction determination without interfering with other communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a communication apparatus broadcasts a response request to surrounding communication apparatus for malfunction diagnosis, then the malfunction determination is improved, but a lot of responses occur and the original communication is prevented due to high response rate
Solution Approach 1:
The system dynamically adjusts the response behavior of communication apparatus based on real-time congestion degree detection. When congestion is detected, apparatus suppress responses; when not congested, apparatus respond normally to diagnosis requests. This dynamic adaptation resolves the contradiction between maintaining diagnosis reliability and ensuring normal communication productivity.
Solution Approach 2:
The system changes the parameter of response transmission based on the congestion degree parameter. By monitoring communication congestion levels and adjusting whether to transmit responses accordingly, the system optimizes the balance between malfunction diagnosis effectiveness and normal communication flow, preventing response storms while maintaining diagnostic capability.
2Reliability
If communication apparatus transmit response signals frequently for malfunction determination, then the diagnosis function is improved, but communication congestion increases and obstructs other information transmission
Solution Approach 1:
The system implements feedback control by having communication apparatus monitor the congestion degree of communication channels and adjust their response transmission behavior accordingly. This feedback mechanism prevents response signals from causing congestion by suppressing transmissions when congestion is detected, thus eliminating the harmful effect while maintaining the diagnostic function.
Solution Approach 2:
The response transmission behavior is made dynamic rather than static. Apparatus continuously assess communication conditions and adjust their response strategy in real-time, transmitting responses only when communication channels are not congested. This dynamic approach prevents the accumulation of response signals that would cause congestion while still enabling effective malfunction diagnosis.
Data Source
AI summary
A communication system including a first communication apparatus and a second communication apparatus is provided. The first communication apparatus includes a communication portion. The second communication apparatus includes a communication portion. The first communication apparatus includes a first transmission portion. The first transmission portion transmits a first signal to another communication apparatus. The first signal at least includes information enabling to specify the first communication apparatus. The second communication apparatus includes a second transmission portion. The second transmission portion transmits a second signal to the first communication apparatus. The first communication apparatus includes a malfunction determination portion. The malfunction determination portion determines whether the communication portion of the first communication apparatus is out of order. The communication system includes a congestion determination portion. At least one of the first signal and the second signal is transmitted.