Telematics Control Unit Wireless Activity Logging
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Solution Overview
Problem
Existing vehicle communication systems face challenges in efficiently monitoring and resolving malfunctions, particularly due to the mobile nature of vehicles, which makes diagnosing cellular network issues and component malfunctions difficult and resource-intensive.
Innovation Solution
A telematics control unit (TCU) is configured to periodically record wireless activity data related to authentication, attachment, signaling, detachment, and handover procedures, and transmit relevant logs to a remote diagnostic server for analysis, using protocols like MQTT for efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vehicle communication systems continuously monitor and log all wireless activity data, then diagnostic accuracy and malfunction detection capability are improved, but device complexity and data storage requirements increase
Solution Approach 1:
The patent segments the logging process by creating separate log files for different types of wireless activities (authentication logs, attachment logs, signaling logs, detachment logs, handover logs). This segmentation allows the system to monitor comprehensive wireless activity without creating a single overwhelming data structure, thereby maintaining diagnostic accuracy while managing system complexity through organized modular logging.
Solution Approach 2:
The system performs preliminary actions by continuously logging wireless activity data in real-time before malfunctions occur. The TCU proactively records authentication, attachment, signaling, detachment, and handover procedures in structured log files, so when a malfunction is detected, the diagnostic server already has pre-prepared data to analyze, eliminating the need for post-malfunction data collection and improving diagnostic speed.
2Ease of operation
If the TCU transmits all logged wireless activity data to the remote diagnostic server, then remote diagnostic capability is improved, but data transmission time and network resource consumption increase
Solution Approach 1:
The patent extracts and transmits only the specific log files relevant to the detected malfunction type. When a malfunction is detected, the system identifies which log file corresponds to the malfunction (authentication log, attachment log, signaling log, detachment log, or handover log) and transmits only that specific file to the remote diagnostic server, rather than transmitting all logged data. This extraction approach maintains comprehensive remote diagnostic capability while significantly reducing data transmission time and network resource consumption.
3Reliability
If the system logs detailed wireless activity data for all procedures, then malfunction analysis completeness is improved, but processing power and memory requirements increase
Solution Approach 1:
The patent divides wireless activity logging into five distinct segmented log files based on procedure type: authentication procedures, attachment procedures, signaling procedures, detachment procedures, and handover procedures. Each log file captures detailed data for its specific procedure type with dedicated data structures and formats. This segmentation allows the system to maintain complete malfunction analysis capability for each procedure type while reducing overall processing resource consumption by only actively managing and analyzing the relevant log file when a malfunction occurs, rather than continuously processing all data simultaneously.
Data Source
AI summary
A vehicle system includes a telematics control unit (TCU) coupled to a plurality of vehicle controllers. The TCU is configured to periodically record in a log wireless activity data relating to an authentication, attachment, signaling, detachment, and handover procedure of the TCU to provide one or more remote vehicle services. The TCU is further configured to, responsive to detecting a cellular malfunction from the logged data, wirelessly transmit at least a portion of the log that corresponds to the cellular malfunction offboard the vehicle for a remote server configured to diagnose operation of the TCU.