D2D Communication for Emergency Vehicle Priority
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Solution Overview
Problem
Current navigation systems fail to effectively manage emergency situations on roads, as they do not provide adequate communication or control mechanisms for emergency vehicles to navigate through traffic efficiently and safely.
Innovation Solution
A device-to-device (D2D) communication system that allows emergency vehicles to transmit emergency messages to other vehicles and traffic lights, prioritizing signal allocation and providing real-time information to ensure safe and rapid passage, using millimeter wave beamforming for enhanced communication in challenging environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If navigation service is provided to vehicle drivers, then drivers can identify road situation and traffic information, but it is difficult to cope with emergency situations suddenly occurring on a road
Solution Approach 1:
The navigation system is enhanced with multiple functions including emergency situation detection, D2D communication for transmitting emergency messages to other vehicles and traffic lights, and automatic traffic light control. This multi-functionality allows the same system to serve both routine navigation and emergency response purposes, resolving the contradiction between reliability for emergency coping and adaptability for various operational modes.
Solution Approach 2:
A D2D communication module acts as an intermediary between the emergency vehicle's navigation system and other road users (vehicles and traffic lights). This intermediary enables the navigation system to not only display information but also actively communicate emergency status and control traffic signals, thereby enhancing emergency coping capability while maintaining the system's navigational functions.
2Speed
If emergency vehicle transmits emergency messages to other vehicles and traffic lights using D2D communication, then safe and rapid passage is ensured, but signal transmission resources may be insufficient in congested areas
Solution Approach 1:
The system implements feedback mechanisms where the emergency vehicle continuously monitors transmission quality and resource availability through D2D communication. Based on this feedback, the system dynamically adjusts transmission power, message frequency, and prioritization levels to ensure rapid passage while optimizing resource consumption. The traffic lights also provide feedback on their current state, allowing the emergency vehicle to plan its route and transmission strategy accordingly.
Solution Approach 2:
The system changes transmission parameters such as power level, message interval, and communication frequency dynamically based on the emergency vehicle's speed, location, and surrounding environment. In congested areas with limited resources, parameters are adjusted to maintain critical communications while reducing overall energy consumption, thus resolving the contradiction between speed of passage and resource usage.
3Loss of time
If traffic light is controlled on the basis of D2D communication by emergency vehicle electronic device, then emergency vehicle can pass rapidly, but other vehicles may experience traffic disruption
Solution Approach 1:
The system performs preliminary actions by notifying traffic lights of the approaching emergency vehicle before the vehicle reaches the intersection. The traffic light receives the emergency message in advance and prepares to switch to green signal, allowing the emergency vehicle to pass rapidly without stopping. This preliminary action minimizes the emergency vehicle's waiting time while giving other vehicles advance notice to prepare for the signal change, thus balancing rapid passage with overall traffic flow management.
Solution Approach 2:
The system allows the emergency vehicle to skip the normal traffic signal waiting process by directly controlling the traffic light to green through D2D communication. This skipping mechanism enables rapid passage for the emergency vehicle while the system manages the impact on other vehicles through coordinated signal timing and advance notification, resolving the contradiction between reducing waiting time and maintaining overall traffic productivity.
4Reliability
If millimeter wave beamforming is used for enhanced communication, then communication reliability in challenging environments is improved, but device complexity increases
Solution Approach 1:
The beamforming system is segmented into separate functional modules including signal generation, phase control, and amplitude control units. Each module handles a specific aspect of the beamforming process, making the overall complex system more manageable and maintainable. This segmentation allows the system to achieve high communication reliability in challenging environments while keeping device complexity organized and controllable through modular architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables emergency vehicles to navigate through traffic efficiently by prioritizing signal allocation and providing real-time information, reducing the risk of collisions and ensuring safe and rapid passage, even in areas with limited visual fields.
Implementation Method 1
providing vehicle driving-related information on the basis of a transmission/reception beam pair of a road side unit (RSU) and an on-board unit (OBU), in a system supporting millimeter wave beamforming
Data Source
AI summary
A method and apparatus for traffic safety are provided using vehicle driving-related information obtained on the basis of a transmission/reception beam pair of a road side unit (RSU) and a vehicle on-board unit (OBU), thereby reducing a probability that vehicle collisions occur where visual fields may be obscured. The method includes setting a path from a current location of the electronic device to a destination, and transmitting a message indicating an emergency situation to other devices located on the path while moving to the destination. The method further includes determining a transmission/reception beam pair of the electronic device and a road apparatus, using a reference signal received from the road apparatus, transmitting a signal including information for the transmission/reception beam pair to the road apparatus, and receiving, from the road apparatus, a message warning that the electronic device and another neighboring electronic device are approaching each other.