V2V Sensor Data Sharing via Latency Budgets
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Solution Overview
Problem
Vehicle-to-vehicle (V2V) communication systems face challenges in efficiently sharing sensor data, such as pedestrian and obstacle information, without overloading the network, as multiple vehicles may transmit the same data, leading to increased bandwidth usage and potential congestion.
Innovation Solution
Implementing a method where vehicles associate a transmission latency budget with sensed data and only transmit if they receive the information outside of this budget, using listen-before-talk mechanisms and resource-to-location mapping to avoid redundant transmissions and optimize channel resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all vehicles broadcast sensor information about the same obstacle or pedestrian, then complete information coverage is achieved, but bandwidth usage and network load increase significantly
Solution Approach 1:
The patent extracts only the necessary sensing information about observed objects (pedestrians, obstacles, vehicles) and transmits it selectively through V2V communications rather than having all vehicles broadcast complete sensor data. This reduces the quantity of transmitted information while maintaining essential safety coverage.
Solution Approach 2:
Multiple vehicles share and combine their sensor observations about the same road objects through V2V communications. Instead of each vehicle independently broadcasting, the system merges information from multiple sources, allowing vehicles to relay observations about objects they detect, thereby achieving comprehensive coverage with reduced redundant transmissions.
2Reliability
If vehicles transmit sensor data frequently to ensure timely information sharing, then road safety is improved, but network congestion and data redundancy increase
Solution Approach 1:
The transmission frequency and latency budget are made dynamic based on the criticality of the observed object. Critical objects (e.g., pedestrians, obstacles) have shorter latency budgets requiring faster transmission, while less critical objects allow longer intervals. This dynamic adjustment ensures timely safety information while reducing unnecessary frequent transmissions that cause network congestion.
3Quantity of substance
If vehicles use listen-before-talk mechanisms and resource-to-location mapping, then redundant transmissions are reduced, but device complexity and processing requirements increase
Solution Approach 1:
Vehicles perform preliminary checks using listen-before-talk mechanisms before transmitting sensor data. The system preemptively determines whether transmission is necessary by checking if other vehicles are already broadcasting information about the same object, thereby avoiding redundant transmissions before they occur rather than detecting and eliminating redundancy after transmission.
Data Source
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AI summary
Wireless communications systems and methods related to sharing of sensor data among vehicles are provided. A first vehicle receives, from a second vehicle, first sensing information associated with a first object. The first vehicle detects sensor data associated with a second object. The first vehicle transmits second sensing information associated with the second object based on at least the sensor data, the first sensing information, and a transmission latency budget for the second sensing information. The first sensing information includes geographical location information of the first object. The second sensing information includes geographical location information of the second object. Other aspects, embodiments, and features are also claimed and described.