Data transmission method and system based on vehicle track

Abstract

The invention relates to a data transmission method and a data transmission system based on vehicle tracks. The data transmission method based on vehicle tracks comprises steps that mobile nodes are disposed on all vehicles, fixed nodes are arranged at partial intersections, and a source node is arranged in a network access point; when the source node needs to send a message to a target vehicle, whether any fixed node exists on a progressing track of the target vehicle is determined; if any fixed node exists on the progressing track of the target vehicle, then the source node finds a tail node for message transmission on the progressing track of the target vehicle; the source node predicts every node distribution location at any moment according to the vehicle progressing tracks reported by every mobile node, and then according to the principle of minimum message transmission time delay, a transmission node sequence from the source node to the tail node is selected based on the node distribution location and the message transmission time delay of the node; the message is transmitted to the tail node along the transmission node sequence, and the tail node then forwards the message to the mobile node on the target vehicle. The data transmission method and the data transmission system based on vehicle tracks improve effectiveness and reliability of data transmission and at the same time effectively reduce data transmission cost.

Description

technical field [0001] The invention relates to the field of communication, in particular to a data transmission method and system based on vehicle trajectory. Background technique [0002] At present, the infrastructure-to-vehicle (Internet access point to mobile vehicle) data transmission method in VANET (Vehicular Ad-hoc Network, vehicle self-organizing network) mainly includes the infrastructure-to-vehicle data transmission based on trajectory prediction proposed by Tian et al. Algorithm, the infrastructure-to-vehicle data transmission method based on the trajectory of the target vehicle is proposed for the first time. The algorithm assumes that each intersection has a fixed node. When there is a message to be sent, it predicts a series of fixed nodes that the destination node (ie, the mobile node on the destination vehicle) will pass through, and finds a fixed node from them, so that the source node When the message arrives at the fixed node, the probability that the d...

AI Technical Summary

Problems solved by technology

This algorithm solves the problems of large infrastructure-to-vehicle transmission delay jitter and low success rate. However, due to the need to install fixed nodes at each intersection, there is a large demand for VANET network construction and high maintenance costs, and its research results are difficult. Direct application in reality cannot be the ultimate effective means to solve problems

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