Mine Fleet Server Communication Timing Control
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Solution Overview
Problem
In mine environments, autonomous dump trucks experience communication congestion at wireless base stations due to overlapping communication timings, leading to delays and increased server load, which affects productivity and communication reliability.
Innovation Solution
A vehicle travel control system that sets travel-permitted segments and calculates communication timings to disperse the transmission of permission request information, ensuring a predetermined threshold difference between haulage vehicles' communication timings, thereby reducing congestion and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple dump trucks transmit permission request information simultaneously to the same wireless base station, then communication coverage is maintained, but communication congestion occurs and reliability deteriorates
Solution Approach 1:
The patent implements periodic action by calculating and determining communication timings for multiple haulage vehicles to transmit permission request information at different time points. The communication timing determination unit compares calculated timings and determines whether the difference meets a predetermined threshold, ensuring vehicles transmit periodically rather than simultaneously, thus avoiding congestion while maintaining coverage.
2Loss of energy
If data identification information is used to reduce transmission amount, then communication load is reduced, but overlapping transmission timings are not prevented
Solution Approach 1:
The patent applies segmentation by dividing the communication process into distinct phases: calculating communication timings based on vehicle positions, determining whether timing differences meet thresholds, and then transmitting data identification information only when timing conditions are satisfied. This segmentation separates the timing coordination function from the data transmission function, preventing congestion while maintaining reduced data load.
3Area of stationary object
If wireless base stations are arranged scatteredly to cover travel routes, then communication coverage is improved, but communication congestion occurs at overlapping coverage areas
Solution Approach 1:
The patent implements preliminary action by calculating communication timings in advance based on vehicle positions and travel routes before actual transmission occurs. The communication timing calculation unit determines when each vehicle should transmit, and the determination unit verifies timing differences meet thresholds, preventing congestion before it occurs at scattered base stations while maintaining comprehensive coverage.
Data Source
AI summary
To provide a technology that enables dump trucks to travel smoothly even in a mine where electromagnetic wave conditions are bad. The invention is a vehicle travel system in which haulage vehicles 20 traveling in a premise of a mine along predetermined travel routes 60 and a fleet management server for managing operations of haulage vehicles are connected in communication together via wireless communication network and that sets a travel-permitted segment n+1 so that difference between a communication timing at which the haulage vehicle 20-1 transmits permission request information to the fleet management server from a provisional permission-requesting point RP and communication timing at which other haulage vehicle transmits the permission request information to the same wireless base station may become more than or equal to a predetermined threshold value.