A Cache Deployment Method for Internet of Vehicles under the State of Expressway Free Flow

Abstract

The invention discloses a cache deployment method of the Internet of Vehicles under the free flow state of the expressway. The method models the instant position of the vehicle under the free flow state on the expressway within a certain period of time as a one-dimensional Poisson point process, and adopts Gaussian mixture The model calculates the traffic flow density at this time as the density of the above Poisson point process. According to the popularity of different cache contents, this method adopts a probabilistic cache strategy to deploy cache in the vehicle unit, and uses stochastic geometric mathematical tools to model and analyze the cache hit rate of the Internet of Vehicles. Finally, the method establishes an optimization model to obtain the cache deployment method when the Internet of Vehicles cache hit rate is the highest. The present invention can relieve the bandwidth pressure of the backhaul link by pre-storing popular content in the vehicle-mounted unit, reduce repeated transmission of content and data transmission delay, and greatly improve the service experience of Internet of Vehicles users.

Description

technical field [0001] The invention relates to the technical field of Internet of Vehicles resource management, in particular to a method for deploying caches of Internet of Vehicles under free-flow state of expressways. Background technique [0002] The Internet of Vehicles involves multiple industries such as transportation, information communication, and the Internet. It is an important field for the deep integration of informatization and industrialization. It has huge industrial development potential, application market space, and considerable social benefits. Industrial transformation and upgrading, technological innovation and integrated development are of great significance. With the evolution of 5G communication technology and the development of intelligent vehicles, the Internet of Vehicles has higher and higher requirements for information transmission quality. Ultra-low latency and ultra-high reliability communication service guarantee is the key to the implemen...

AI Technical Summary

Problems solved by technology

[0004] At present, there are few studies on the Internet of Vehicles cache, and none of them has analyzed the impact of the cache strategy on the performance of the Internet of Vehicles cache from a global perspective. Therefore, a systematic analysis method is needed to guide the deployment of the Internet of Vehicles cache.

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