A car networking transmission method and device based on information freshness

Abstract

The embodiment of the present invention provides a transmission method and device for the Internet of Vehicles based on information freshness, which is applied in the technical field of the Internet of Vehicles. The method includes: according to the initial objective function and within the preset time period T, the vehicle collection node does not send data Packet time, the information age of the vehicle collection node is a fixed value, and the update objective function is obtained; the network is constrained by minimizing the rate of change of the Lyapunov function, and the final objective function is obtained, and the upper limit of the final objective function is calculated at T=1. By minimizing The upper limit is determined to minimize the suboptimal solution of the final objective function, and the update strategy function and the routing algorithm function are obtained. The update strategy is determined according to the update strategy function, and the measurement factor is determined according to the Q-learning algorithm and the routing algorithm function. The vehicle acquisition node performs information based on the update strategy. Update the decision, select the neighbor node with the largest weighing factor to transmit the data packet. The invention can reduce computational complexity and information age.

Description

Technical field [0001] The present invention relates to the technical field of the Internet of Vehicles, in particular to a method and device for Internet of Vehicles transmission based on information freshness. Background technique [0002] With the development of science and technology and the advancement of technology, various sensor devices have become popular, covering almost every corner. They are mainly used for information collection and transmission to support applications such as environmental monitoring, vehicle positioning, and anomaly detection. The timeliness of this type of information is especially important, and its importance is also positively related to timeliness, and its importance generally declines sharply with the passage of time. In order to measure the timeliness of information, scholars have proposed the indicator of information age. Information age can be used to measure the timeliness of information in a network. The meaning of information age refer...

AI Technical Summary

Problems solved by technology

In the prior art, the routing algorithm obtained by optimizing the throughput in the multi-hop network takes the network indicators such as throughput and delay as the optimization target, although it can maximize the network throughput and improve the resource utilization, but it cannot measure the network The information timeliness of each node in

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