Margin-Time Control Sequencing for Mixed Traffic Communication
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Solution Overview
Problem
Existing general control systems face challenges in managing real-time communication and control in complex environments with varying radio wave conditions and mixed mobile and pedestrian traffic, leading to delayed information sharing and increased collision risks due to inconsistent reaction times.
Innovation Solution
A general control system that calculates margin times based on sensing, communication, and reaction times to determine the execution order of applications and communications, ensuring real-time performance by prioritizing processing based on these times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If recognition information is shared with mobile bodies or persons having poor radio wave conditions, then communication reliability is improved, but communication time increases and real-time performance deteriorates
Solution Approach 1:
The system dynamically adjusts communication strategies based on real-time radio wave conditions. The communication time variation depending on place is addressed by making the communication approach adaptive rather than static, allowing the system to select appropriate communication methods based on current channel quality
Solution Approach 2:
The system performs preliminary estimation of communication required time before actual communication occurs. By calculating the margin time based on estimated communication time, sensing time, and reaction time in advance, the system can prioritize communications that are likely to meet real-time requirements
2Ease of operation
If information is shared in the order of mobile body and person, then processing sequence is simplified, but collision risk increases when person has poor communication state
Solution Approach 1:
The execution order of applications is dynamically determined based on calculated margin times rather than following a fixed sequence. The processing management unit adjusts the order of executing applications for different control targets (mobile bodies vs. persons) based on their specific communication conditions and reaction times, making the system adaptable to varying situations
Solution Approach 2:
Different communication and processing strategies are applied to different control targets based on their individual characteristics. The system calculates separate margin times for mobile bodies and persons, and determines execution orders specific to each target type, rather than applying a uniform approach to all
3Reliability
If control reaction time is extended for mobile bodies, then control accuracy is improved, but real-time performance deteriorates when persons are involved
Solution Approach 1:
The system applies different reaction time parameters and control strategies to different control targets. Mobile bodies with longer reaction times receive appropriate prioritization in the execution order, while persons with shorter reaction times are handled with corresponding adjustments, allowing each to receive appropriate attention without compromising overall real-time performance
Solution Approach 2:
The margin time calculation is performed in advance for each control target based on their specific reaction time characteristics. This preliminary calculation allows the system to pre-determine the execution order that will ensure both mobile bodies and persons receive control instructions within their respective time requirements
Data Source
AI summary
A control system comprises: moving body detecting units transmitting information about moving bodies; and a control system receives the moving body information and transmits it to a control processing unit. The control system comprises: a surplus time calculation unit that calculates a first surplus time on the basis of the response time and an estimated time required for communication control of the moving body; a processing management unit that determines an execution sequence for the control information; an application unit that calculates control information on the basis of the information about moving bodies and the execution sequence determined by the processing management unit; and a transmission control unit that calculates a second surplus time on the basis of the response time of the moving body and the actual time required for communication control, and transmits control information to the control processing unit according to the second surplus time.