Vehicle Broadcast Resource Collision Avoidance via Dynamic Selection
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Solution Overview
Problem
In the Internet of Vehicles (IoV) system, vehicles broadcasting their information experience message collisions due to overlapping resource usage, leading to reduced transmission success rates and decreased driving safety, as they cannot effectively detect and avoid colliding interference between broadcast messages.
Innovation Solution
An apparatus and method that utilize a sending module to broadcast vehicle information at a selected idle resource location, detected by a receiving module which identifies colliding interference through collision identifiers, allowing vehicles to reselect resource locations and avoid message collisions, thereby ensuring successful message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If vehicles broadcast status information at a frequency of 1-10 Hz (cycle of 100 ms to 1000 ms), then real-time awareness of surrounding vehicles is improved, but message collisions increase causing receiving vehicles to fail to successfully receive broadcast messages
Solution Approach 1:
The patent segments the broadcast resource into multiple resource locations (first resource location for sending, second resource location for detection) within each cycle. Vehicles are divided into sending vehicles and detecting vehicles based on their roles in different time slots, allowing simultaneous broadcasting without collision by spatial-temporal separation.
Solution Approach 2:
The patent implements dynamic resource selection where vehicles randomly select resource locations for sending and detection in each cycle. This dynamic allocation adapts to changing traffic conditions and vehicle densities, distributing the broadcasting load across available resources to minimize collisions while maintaining high broadcast frequency.
2Quantity of substance
If multiple vehicles broadcast simultaneously in a high-density area (200-1000 vehicles), then comprehensive information coverage is improved, but colliding interference increases reducing transmission reliability
Solution Approach 1:
The patent introduces an additional dimension of resource location selection beyond simple time-frequency resources. By adding the dimension of random resource location assignment within each cycle, the system transforms the one-dimensional collision problem into a multi-dimensional resource allocation problem, significantly reducing interference in high-density scenarios.
Solution Approach 2:
The patent implements a feedback mechanism where detecting vehicles monitor the first resource location for colliding interference and send detection results to the network side. The network side uses this feedback to adjust resource allocation and guide vehicles to select alternative resource locations, creating a closed-loop system that adapts to interference conditions.
Data Source
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AI summary
The present invention provides an apparatus and a method for sending vehicle broadcast information. The apparatus for sending vehicle broadcast information broadcasts a message of first vehicle information at a first resource location of each cycle, where the message of the first vehicle information includes at least driving information of a vehicle that carries first UE; detects, at a second resource location of each cycle, a message of second vehicle information sent by second UE, where the message of the second vehicle information includes at least driving information and a first collision identifier that are of a vehicle that carries the second UE, and the first collision identifier is used to indicate that colliding interference exists at the first resource location of the first UE in each cycle; and the apparatus for sending vehicle broadcast information selects an idle resource location at the second resource location, and uses the selected idle resource location as the first resource location of the first UE in each cycle. This reduces a message collision and ensures that a vehicle successfully receives a broadcast message of a surrounding vehicle, thereby improving driving safety.