Communication Control Part Signal Rate Management
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Solution Overview
Problem
Existing communication apparatuses in in-vehicle networks can propagate the state of a receiving-side communication path to a transmitting-side communication path, leading to potential network congestion and failure in essential control communications.
Innovation Solution
A communication apparatus with a communication unit and a communication control part that manages the transmission of signals between two communication paths, where the control part adjusts the transmission rate based on the number of signals received from the first communication path, ensuring that the number of signals transmitted to the second path is less than the number received, thereby preventing propagation of traffic from the receiving-side to the transmitting-side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the communication apparatus forwards all received signals from the first communication path to the second communication path, then the communication apparatus maintains high signal transmission efficiency, but the state of the receiving-side communication path propagates to the transmitting-side communication path causing network congestion
Solution Approach 1:
The patent changes the transmission parameter by controlling the transmission period of signals from the first communication path to the second communication path. When the reception period is shorter than the transmission period, the system adjusts the transmission frequency to prevent traffic propagation while maintaining essential signal transmission, thus resolving the contradiction between transmission efficiency and communication stability
2Speed
If the communication apparatus transmits signals at the same rate as reception from the first communication path, then the signal transmission speed is maximized, but network congestion occurs due to propagation of receiving-side traffic state
Solution Approach 1:
The patent implements periodic action by setting a transmission period that is longer than the reception period. This creates a controlled rhythm in signal transmission where signals are sent at regular intervals rather than continuously at maximum speed, preventing traffic propagation while maintaining necessary communication throughput
Data Source
AI summary
A communication apparatus of an embodiment includes: a communication unit that is capable of communicating with a first communication path and a second communication path; and a communication control part that controls the communication unit and that transmits a signal to the second communication path based on a signal which is received from the first communication path, wherein when a number of signals that are received from the first communication path in a first predetermined time span is more than a predetermined number, the communication control part performs a control such that a relationship between a number m1 of signals which are received from the first communication path and a number m2 of signals which are transmitted to the second communication path becomes m1>m2.