Remote Control Delay Detection Using Round-Trip Time Stamps
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Solution Overview
Problem
Existing delay detection systems, such as Patent Literature 1, fail to accurately monitor delays in a remote control system as a whole, particularly in self-driving vehicles, due to reliance on partial delay measurements, which can lead to safety issues during remote operation.
Innovation Solution
A delay detection method and device that involve adding time information to mobile body information and operation signals, allowing for comprehensive delay detection by calculating round-trip delays based on first and second time information, enabling accurate monitoring and safety measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If partial delay measurement is used to simplify the detection system, then device complexity is reduced, but measurement precision deteriorates because the system cannot monitor delays in the system as a whole
Solution Approach 1:
The delay detection is segmented into multiple measurement points: first time information is added at the mobile body when generating mobile body information, and second time information is added at the terminal when generating operation signals. This segmentation allows each component to contribute to the overall delay measurement without requiring a monolithic complex detection system, thereby reducing device complexity while maintaining comprehensive measurement precision.
2Measurement precision
If round-trip delay measurement is implemented to improve system-wide monitoring, then measurement precision is improved, but device complexity increases due to multiple time information tracking requirements
Solution Approach 1:
The first time information is preliminarily added to the mobile body information at the source (mobile body) before transmission to the terminal. This preliminary action ensures that the time reference is established early in the signal flow, simplifying subsequent delay calculations at the terminal and reducing the overall complexity of time information tracking while enabling accurate round-trip delay measurement.
3Reliability
If comprehensive time information tracking is used to detect system-wide delays, then reliability is improved for safety measures, but loss of time increases due to additional processing steps
Solution Approach 1:
The mobile body and terminal autonomously attach time information to their respective signals without requiring external time synchronization infrastructure. The mobile body attaches first time information to its information, and the terminal attaches second time information to operation signals. This self-service approach eliminates the need for complex external time distribution systems, reducing processing overhead and time loss while maintaining high reliability for delay detection and safety measures.
Data Source
AI summary
A delay detection method, which is a delay detection method to be executed by a mobile body that is remotely controllable by an operator, includes: adding first time information to mobile body information indicating a state of the mobile body, and transmitting, to a terminal of the operator, the mobile body information to which the first time information has been attached; receiving an operation signal that includes details of remote control performed by the operator in response to the mobile body information, the operation signal including second time information that is based on the first time information included in the mobile body information; and detecting a delay in a remote control system including the mobile body and the terminal, based on the second time information and a predetermined time.