Single-hop cooperative broadcasting method for safety message of Internet of Vehicles based on hidden Markov model

Abstract

The invention discloses a single-hop cooperative broadcasting method for a safety message of Internet of Vehicles based on a hidden Markov model, and belongs to the field of Internet of Vehicles. A receiving success rate of collaborative rebroadcasting is further improved by improving the prediction accuracy of an initialized broadcasting result. The method comprises the following steps of firstly, predicting a channel state by utilizing a received power sequence; secondly, carrying out initialized broadcasting; thirdly, selecting an optimal cooperative node according to an overlap ratio of the transmission range of each alternative node and a predicted failure node set; and finally, carrying out collaborative rebroadcasting, and making the selected cooperative node and a source node retransmit a data packet in a time slot of the source node. The hidden Markov model is introduced into the cooperative broadcasting method, so that the prediction accuracy of the initialized broadcasting result is improved, and thus the more targeted cooperative node can be selected for cooperative rebroadcasting, and the receiving success rate can be further improved.

Description

technical field [0001] The invention belongs to the field of Internet of Vehicles, in particular to a method for single-hop cooperative broadcasting of safety messages of Internet of Vehicles based on a hidden Markov model. Background technique [0002] In order to solve the increasingly serious traffic congestion, frequent accidents and other problems, the Internet of Vehicles has emerged as the times require, and has become the focus of common attention of governments, domestic and foreign universities and major companies. Through various sensors and communication modules installed on the vehicle, the vehicle can not only perceive the surrounding things, but also share information with other surrounding vehicles, pedestrians and infrastructure. The Internet of Vehicles can provide a variety of services. Generally speaking, these services can be divided into the following three categories: (1) safety applications (such as: collision warning, blind spot warning, and change a...

AI Technical Summary

Problems solved by technology

Although the existing technology has introduced cooperative retransmission into the single-hop broadcast method to resist the decline in the reception success rate caused by the fading of the wireless channel, the method adopted in the prior art to predict the reception result based on the historical reception success rate The accuracy is low, and the cooperative retransmission is poorly targeted

Images