Vehicle Sensor Data Transmission Control for 5G Shadowing
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Solution Overview
Problem
In 5G communication systems, high-frequency radio waves have high spatial-propagation directivity, leading to signal strength decrease and increased shadowing effects, causing communication failures with vehicle-mounted devices, resulting in wasteful retransmissions and discarded sensor data due to intercepted signals by architectural structures and moving bodies.
Innovation Solution
A vehicle-mounted device with a collector, transmitter, buffer unit, and controller that determines and manages transmission based on predetermined conditions, prioritizing sensor data with shorter delay times, and a server that classifies and processes sensor data accordingly to suppress wasteful retransmissions and ensure effective data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor data is continuously transmitted to external apparatus, then communication reliability is improved, but wasteful retransmissions occur due to shadowing effects in 5G high-frequency communication
Solution Approach 1:
The determination unit preliminarily determines whether shadowing is occurring before transmission begins. When shadowing is detected, the controller suspends transmission in advance, preventing wasteful retransmissions. This preliminary detection and suspension mechanism resolves the contradiction by avoiding unnecessary transmission attempts during shadowing conditions while maintaining reliability through selective transmission during favorable conditions.
Solution Approach 2:
The system continuously monitors communication conditions and uses feedback to dynamically control transmission. When shadowing is detected, the determination unit provides feedback to the controller, which then suspends transmission. This feedback mechanism enables the system to adapt to changing communication conditions, preventing wasteful retransmissions while maintaining reliability through condition-based transmission decisions.
2Loss of energy
If transmission is suspended during shadowing, then wasteful retransmissions are suppressed, but sensor data may be discarded due to transmission failures
Solution Approach 1:
The buffer unit stores sensor data in advance during shadowing conditions before transmission resumes. This preliminary storage action ensures that when transmission is suspended, data is not lost but rather preserved for later transmission, resolving the contradiction between suppressing wasteful retransmissions and preventing data loss.
Solution Approach 2:
The buffer unit acts as a cushioning mechanism that absorbs and stores sensor data during shadowing periods. This beforehand cushioning ensures that when transmission is suspended due to shadowing, the data is protected and can be transmitted later without loss, thereby preventing information loss while avoiding wasteful retransmissions during shadowing conditions.
3Loss of information
If all sensor data is transmitted concurrently, then data completeness is improved, but transmission time is increased due to large data volume
Solution Approach 1:
The buffer unit segments sensor data into multiple categories based on delay time requirements. The controller then transmits different segments at different rates and times, allowing data completeness to be maintained while reducing overall transmission time through prioritized, segmented transmission rather than simultaneous transmission of all data.
Solution Approach 2:
The controller transmits sensor data selectively based on priority and delay time requirements rather than transmitting all data simultaneously. This partial action approach ensures that critical data with shorter delay times is transmitted first, maintaining data completeness for essential information while reducing transmission time by excluding non-critical data from immediate transmission.
4Speed
If high-frequency 5G radio waves are used, then communication speed is improved, but shadowing effects increase causing signal strength decrease
Solution Approach 1:
The determination unit continuously monitors communication quality and provides feedback about shadowing conditions to the controller. This feedback mechanism enables the system to detect and respond to shadowing effects in real-time, allowing the controller to suspend transmission when shadowing occurs, thereby mitigating the harmful effects of 5G shadowing while maintaining high communication speed during favorable conditions.
Data Source
AI summary
A vehicle-mounted device collects and transmits sensor data to an external apparatus, a buffer unit that stores the sensor data. A determination unit that determines whether or not a predetermined condition is satisfied, and a controller that controls transmission of the sensor data by the transmitter to the external apparatus. The controller causes the transmitter to stop transmitting the sensor data collected by the collector to the external apparatus when the determination unit determines that the predetermined condition is satisfied, and causes, when a determination result obtained by the determination unit changes to indicate that the predetermined condition is not satisfied after the determination unit determines that the predetermined condition is satisfied, the transmitter to concurrently transmit the sensor data stored in the buffer unit to the external apparatus while giving priority to sensor data with a shorter delay time based on priority levels according to delay time.