Communication System Data Transmission Interval Control
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Solution Overview
Problem
In communication systems where vehicles exchange data via a communication bus, unauthorized data transmission can lead to improper processing, causing authorized data to be discarded along with unauthorized data, thereby preventing execution of processing based on authorized data.
Innovation Solution
A communication system where a receiving device sets a time range and a transmitting device changes the transmission interval if multiple data pieces are received within that range, distinguishing between authorized and unauthorized data to prevent improper processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiving device discards all received specification data when multiple pieces are received within one transmission cycle, then unauthorized specification data is prevented from causing improper processing, but authorized specification data is also discarded along with unauthorized data
Solution Approach 1:
The patent segments the received specification data into authorized data and unauthorized data based on their transmission timing characteristics. By analyzing whether multiple pieces of data were received within one transmission cycle, the system can identify and separate authorized data (transmitted at regular intervals) from unauthorized data (transmitted at irregular intervals), thereby preventing unauthorized data from causing improper processing while preserving authorized data for execution.
2Productivity
If the receiving device accepts all received specification data without verification, then processing based on authorized data can be executed, but unauthorized specification data may cause improper processing
Solution Approach 1:
The patent implements preliminary verification of received specification data by checking the transmission timing before executing processing. The receiving device determines whether multiple pieces of data were received within one transmission cycle of the authorized transmitting device. This preliminary action allows the system to identify unauthorized data in advance and prevent it from causing improper processing, while still enabling execution of processing based on verified authorized data.
3Reliability
If the transmission interval is changed when multiple data pieces are received within the time range, then authorized and unauthorized data can be differentiated, but communication timing may become unstable
Solution Approach 1:
The patent introduces dynamic adjustment of the transmission interval based on the reception status of specification data. When multiple pieces of data are received within one transmission cycle, the transmission interval is extended to prevent further unauthorized data reception. When data reception is normal, the transmission interval returns to the original cycle. This dynamic adjustment enables the system to differentiate between authorized and unauthorized data while maintaining communication timing stability through controlled, conditional changes.
Data Source
AI summary
A communication system includes: a receiving device configured to receive data, and repeatedly set a time range; and a transmitting device configured to repeatedly transmit data to the receiving device at a first time interval, and change a transmission interval at which data is transmitted to the receiving device to a second time interval, which is different from the first time interval, if the number of pieces of data received by the receiving device within the time range is 2 or more.